Supplemental Prospectus (Form 424B5)

Filed Pursuant to Rule 424(b)(5)
Registration No. 333-291911

TABLE OF CONTENTS

PROSPECTUS SUPPLEMENT

PROSPECTUS

S-i

ABOUT THIS PROSPECTUS SUPPLEMENT

We provide information to you about this offering in two separate documents. The accompanying prospectus provides general information about us and the securities we and the Selling Securityholders may offer from time to time, some of which do not apply to this offering. This prospectus supplement provides additional information about us and describes the specific details regarding this offering and the securities offered hereby. Generally, when we refer to this prospectus, we are referring to both this prospectus supplement and the accompanying prospectus combined. To the extent there is a conflict between the information contained in this prospectus supplement, on the one hand, and the information contained in the accompanying prospectus or in any document incorporated by reference that was filed with the Securities and Exchange Commission (the "SEC"), before the date of this prospectus supplement, on the other hand, you should rely on the information in this prospectus supplement.

As permitted under the rules of the SEC, this prospectus supplement incorporates important business information about Symbotic Inc. that is contained in documents that we file with the SEC, but that are not included in or delivered with this prospectus supplement. All of the summaries are qualified in their entirety by the actual documents. You may obtain copies of these documents, without charge, from the web site maintained by the SEC at www.sec.gov, as well as other sources. See "Where You Can Find More Information." Before purchasing any securities, you should carefully read this prospectus supplement together with the additional information described under the headings "Where You Can Find More Information" and "Information We Incorporate by Reference."

You should rely only on the information contained or incorporated by reference in this prospectus supplement and any free writing prospectus prepared by or on behalf of us or to which we have referred you. Neither we, the Selling Securityholders nor the underwriters have authorized any other person to provide you with different information. If anyone provides you with different or inconsistent information, you should not rely on it. We and the Selling Securityholders take no responsibility for, and can provide no assurance as to the reliability of, any other information that others may give you. You should assume that the information contained in this prospectus supplement or any free writing prospectus is accurate as of the date on its respective cover, and that any information incorporated by reference is accurate only as of the date of the document incorporated by reference, unless we indicate otherwise. Our business, financial condition, results of operations and prospects may have changed since those dates.

Neither we, the Selling Securityholders nor the underwriters are making offers to sell the securities described in this prospectus supplement in any jurisdiction in which an offer or solicitation is not authorized or in which the person making such offer or solicitation is not qualified to do so or to anyone to whom it is unlawful to make an offer or solicitation.

Unless the context indicates otherwise, references in this prospectus supplement to the "Company," "Symbotic," "we," "us," "our" and similar terms refer to Symbotic Inc. and its consolidated subsidiaries.

S-1

CAUTIONARY NOTE REGARDING FORWARD-LOOKING STATEMENTS

This prospectus supplement, the accompanying prospectus and the documents incorporated by reference herein and therein may contain forward-looking statements within the meaning of the Private Securities Litigation Reform Act of 1995, Section 27A of the Securities Act of 1933, as amended (the "Securities Act"), and Section 21E of the Securities Exchange Act of 1934, as amended (the "Exchange Act"). These statements include, but are not limited to, our expectations or predictions of future financial or business performance or conditions. Forward-looking statements are inherently subject to risks, uncertainties and assumptions. Generally, statements that are not historical facts, including statements concerning our possible or assumed future actions, business strategies, events or results of operations, are forward-looking statements. These statements may be preceded by, followed by or include the words "believes," "estimates," "expects," "projects," "forecasts," "may," "will," "should," "seeks," "plans," "scheduled," "anticipates," or "intends" or similar expressions.

Forward-looking statements contained in this prospectus supplement include, but are not limited to, statements about our ability to, or expectations that we will:

S-2

Forward-looking statements made in this prospectus supplement, the accompanying prospectus and the documents incorporated by reference herein and therein may also include, but are not limited to, statements with respect to:

Such forward-looking statements involve risks and uncertainties that may cause actual events, results or performance to differ materially from those indicated by such statements. Certain of these risks are identified and discussed in other sections of this prospectus supplement and the accompanying prospectus, including under the heading "Risk Factors" elsewhere in this prospectus supplement and in the documents we incorporate by reference. These risk factors will be important to consider in determining future results and should be reviewed in their entirety. These forward-looking statements are expressed in good faith, and we believe there is a reasonable basis for them. However, there can be no assurance that the events, results or trends identified in these forward-looking statements will occur or be achieved. Forward-looking statements are provided for the purposes of assisting the reader in understanding our financial performance, financial position and cash flows as of and for periods ended on certain dates and to present information about management's current expectations and plans relating to the future, and the reader is cautioned not to place undue reliance on these forward-looking statements because of their inherent uncertainty and to appreciate the limited purposes for which they are being used by management. While we believe that the assumptions and expectations reflected in the forward-looking statements are reasonable based on information currently available to management, there is no assurance that such assumptions and expectations will prove to have been correct.

The forward-looking statements made in this prospectus supplement, the accompanying prospectus and the documents incorporated by reference herein and therein relate only to events as of the date on which the statements are made and are based on the beliefs, estimates, expectations and opinions of management on that date. We are not under any obligation, and expressly disclaim any obligation, to update, alter or otherwise revise any forward-looking statements made in this prospectus supplement, the accompanying prospectus and the documents incorporated by reference herein and therein, whether as a result of new information, future events or otherwise, except as required by law.

Annualized and estimated numbers are not forecasts and may not reflect actual results.

S-3

S-4

S-5

RISK FACTORS

Investing in our Class A Common Stock involves risks. You should carefully consider and evaluate the risk factors discussed below and under the heading "Risk Factors" in our most recent Annual Report on Form 10-K and subsequent Quarterly Reports on Form 10-Q that we file with the SEC, which are incorporated herein by reference, together with the risk factors and other information contained in or incorporated by reference into this prospectus supplement and the accompanying prospectus, before making an investment decision. The occurrence of one or more of the events or circumstances described in these risk factors, alone or in combination with other events or circumstances, may have a material adverse effect on our business, reputation, revenue, financial condition, results of operations and future prospects, in which case the market price of our Class A Common Stock could decline, and you could lose part or all of your investment. The risks and uncertainties described in the documents incorporated by reference herein are not the only risks and uncertainties that we may face.

For more information about our SEC filings, please see "Where You Can Find More Information" and "Information We Incorporate by Reference."

Risks Related to this Offering

We have broad discretion in the use of the net proceeds from this offering.

Our management will have broad discretion in the application of the net proceeds from this offering and could spend the proceeds in ways with which you may not agree. Accordingly, you will be relying on the judgment of our management with regard to the use of the net proceeds, and you will not have the opportunity, as part of your investment decision, to assess whether the proceeds are being used appropriately. It is possible that the net proceeds will be invested or otherwise used in a way that does not yield a favorable, or any, return for us.

You may also experience dilution as a result of this offering, which may adversely affect the per share trading price of our Class A Common Stock.

This offering may have a dilutive effect on our earnings per share after giving effect to the issuance of our Class A Common Stock in this offering and the receipt of the respective expected net proceeds. See "Dilution." The actual amount of dilution from this offering will be based on numerous factors, particularly the use of proceeds and the return generated by such investment, and cannot be determined at this time.

S-6

SELLING SECURITYHOLDERS

The following table sets forth certain information provided by or on behalf of the Selling Securityholders regarding the beneficial ownership of the Selling Securityholders of our Class A Common Stock and the shares of Class A Common Stock being offered by the Selling Securityholders. The applicable percentage ownership of the securities after the offering is based on approximately 113,911,644 shares of Class A Common Stock, 76,296,208 shares of Class V-1 common stock, and 403,559,196 shares of Class V-3 common stock outstanding as of December 2, 2025. Information with respect to shares of Class A Common Stock owned beneficially after the offering assumes the sale of all of the shares of Class A Common Stock offered and no other purchases or sales of our securities. We cannot advise you as to whether Selling Securityholders will in fact sell any or all of such shares of Class A Common Stock.

S-7

USE OF PROCEEDS

We estimate that our net proceeds from this offering will be approximately $  million (or approximately $  million if the underwriters exercise their option to purchase additional Class A Common Stock in full), after deducting the underwriting discounts, commissions and any offering expenses payable by us in this offering. We intend to use the net proceeds from this offering for general corporate purposes.

All of the Class A Common Stock offered by the Selling Securityholders pursuant to this prospectus supplement will be sold by the Selling Securityholders for their own respective accounts. We will not receive any proceeds from the sale of our securities by the Selling Securityholders pursuant to this prospectus supplement.

S-8

CAPITALIZATION

The following table sets forth the Symbotic cash and cash equivalents, marketable securities and equity as of September 27, 2025 on:

S-9

DILUTION

If you purchase our securities in this offering, your interest will be diluted to the extent of the difference between the public offering price per share of our Class A Common Stock and the net tangible book value per share of our Class A Common Stock after this offering.

Our net tangible book value as of September 27, 2025 was $344,197,702 or $3.06 per share of Class A Common Stock. Net tangible book value per share is determined by dividing our total tangible assets, less total liabilities, by the number of shares of our Class A Common Stock outstanding as of September 27, 2025. Dilution with respect to net tangible book value per share represents the difference between the amount per share paid by purchasers in this offering and the as adjusted net tangible book value per share of our Class A Common Stock immediately after this offering.

After giving effect to the sale of shares of our Class A Common Stock in this offering (assuming no exercise of the underwriters' option to purchase additional shares), at a public offering price of $  , our as adjusted net tangible book value as of September 27, 2025 would have been $   million, or $   per share of Class A Common Stock. This represents an immediate increase in net tangible book value of $   per share of Class A Common Stock to existing stockholders and an immediate dilution of $   per share of Class A Common Stock to new investors purchasing shares of our Class A Common Stock.

If the underwriters exercise their option to purchase additional shares of our Class A Common Stock from us in this offering in full, the as adjusted net tangible book value per share after this offering would be $   per share and the dilution in as adjusted net tangible book value per share to new investors purchasing Class A Common Stock in this offering would be $   per share, after deducting underwriting discounts and commissions and estimated offering expenses payable by us.

The table and discussion above do not take into account Class A Common Stock that may be issued from time to time under any employee stock purchase plans or other incentive plans after September 27, 2025.

S-10

UNDERWRITING

The Company, the Selling Securityholders and the underwriters named below have entered into an underwriting agreement with respect to the shares being offered. Subject to certain conditions, each underwriter has severally agreed to purchase the number of shares indicated in the following table. Goldman Sachs & Co. LLC and Citigroup Global Markets Inc. are acting as joint book-running managers and as representatives of the underwriters.

The underwriters are committed to take and pay for all of the shares being offered, if any are taken, other than the shares covered by the option described below unless and until this option is exercised.

The underwriters have an option to buy up to an additional 1,500,000 shares from the Company to cover sales by the underwriters of a greater number of shares than the total number set forth in the table above. They may exercise that option for 30 days. If any shares are purchased pursuant to this option, the underwriters will severally purchase shares in approximately the same proportion as set forth in the table above.

The following table shows the per share and total underwriting discounts and commissions to be paid to the underwriters by the Company and the Selling Securityholders. Such amounts are shown assuming both no exercise and full exercise of the underwriters' option to purchase 1,500,000 additional shares.

Shares sold by the underwriters to the public will initially be offered at the initial public offering price set forth on the cover of this prospectus supplement. Any shares sold by the underwriters to securities dealers may be sold at a discount of up to $   per share from the initial public offering price. After the initial offering of the shares, the representatives may change the offering price and the other selling terms. The offering of the shares by the underwriters is subject to receipt and acceptance and subject to the underwriters' right to reject any order in whole or in part.

The Company, certain officers and directors and their respective affiliates and the Selling Securityholders have agreed with the underwriters, subject to certain exceptions, not to dispose of or hedge any of their common stock or securities convertible into or exchangeable for shares of common stock during the period from the date of this prospectus supplement continuing through the date 60 days after the date of this prospectus supplement (the "Lock-Up Period"), except with the prior written consent of the representatives.

The lock-up restrictions described above applicable to the Company do not apply to (A) the Class A Common Stock to be offered hereunder, (B) the Class A Common Stock or any such substantially similar securities to be issued pursuant to employee incentive plans or similar plans existing as of the date of the underwriting agreement, (C) the Class A Common Stock or any such substantially similar securities to be issued upon the conversion, exchange or exercise of securities outstanding as of the date of the underwriting agreement, (D) the filing by the Company of any registration statement on Form S-8 with the SEC relating to the offering of

S-11

securities pursuant to the terms of such employee incentive plans or similar plans existing on the date of the underwriting agreement, (E) the issuance and transfer of the Class A Common Stock in compliance with the Company's existing obligations under the Amended and Restated Registration Rights Agreement, dated as of June 7, 2022, by and among the Company, SVF Sponsor III (DE) LLC, certain legacy directors of SVF Investment Corp. 3 and certain directors, officers and stockholders of the Company as described in this prospectus supplement and the accompanying prospectus and (F) the issuance by the Company of shares of the Class A Common Stock or securities convertible into shares of the Class A Common Stock in connection with an acquisition, business combination or other strategic transaction, provided that the aggregate number of shares of Class A Common Stock issued pursuant to clause (F) during the Lock-Up Period will not exceed 10% of the total number of shares of Class A Common Stock issued and outstanding as of the date of such acquisition, business combination or strategic transaction, as the case may be, and provided further that holders of any shares of Class A Common Stock issued pursuant to clause (F) shall agree in writing to be subject to the restrictions set forth therein for the duration of the Lock-Up Period.

The restrictions described above applicable to certain officers and directors and their respective affiliates and the Selling Securityholders are also subject to specified exceptions, including the following:

(a) transfers (i) as one or more bona fide gifts or charitable contributions, or for bona fide estate planning purposes, (ii) upon death by will, testamentary document or intestate succession, (iii) (x) if the lock-up party is a natural person, to any member of the undersigned's immediate family or to any trust for the direct or indirect benefit of the lock-up party or the immediate family of the lock-up party, or to any corporation, partnership, limited liability company or other business entity that is an affiliate of the lock-up party or any investment fund or other entity which fund or entity is controlled or managed by the undersigned or affiliates of the lock-up party, or (y) if the lock-up party is a trust, to a trustor or beneficiary of the trust or the estate of a beneficiary of such trust, (iv) to a partnership, limited liability company or other entity of which the lock-up party and the immediate family of the lock-up party are the legal and beneficial owner of all of the outstanding equity securities or similar interests, (v) to a nominee or custodian of a person or entity to whom a disposition or transfer would be permissible under clauses (a)(i) through (iv) above, (vi) if the lock-up party is a corporation, partnership, limited liability company or other business entity, (A) to another corporation, partnership, limited liability company or other business entity that is an affiliate of the lock-up party, or to any investment fund or other entity which fund or entity is controlled or managed by the undersigned or affiliates of the lock-up party, or (B) as part of a distribution by the undersigned to its stockholders, partners, members or other equityholders or to the estate of any such stockholders, partners, members or other equityholders, (vii) by operation of law, such as pursuant to a qualified domestic order, divorce settlement, divorce decree or separation agreement, or otherwise pursuant to an order of a court or regulatory agency, (viii) to the Company from a current or former director, officer, employee, contractor, consultant or other service provider of the Company, (ix) if the lock-up party is not an officer or director of the Company, in connection with a sale of the lock-up party's shares of Class A Common Stock acquired (A) from the underwriters in this offering or (B) in open market transactions after the closing date of this offering, (x) (A) to the public or the Company in connection with the vesting and settlement of restricted stock units (including, by way of "net" or "cashless" exercise, "sell-to-cover" or any other method to satisfy tax withholding obligations as determined by the Company) that are already vested, scheduled to expire or may vest during the Lock-Up Period, including any sale to the public or transfer to the Company for the payment of tax withholdings or remittance payments due as a result of such vesting or settlement or (B) to the Company in connection with the vesting and settlement of other equity awards or with the exercise of warrants or options (including, in each case, by way of "net" or "cashless" exercise) that are already vested, scheduled to expire or may vest during the Lock-Up Period, including any transfer to the Company for the payment of tax withholdings or remittance payments due as a result of such vesting, settlement, or in connection with the conversion of convertible securities, provided in the case of (x)(A) and (x)(B), all such transfers are pursuant to equity awards granted under a stock incentive plan or other equity award plan, or pursuant to the terms of convertible securities, each as described in the registration statement and this prospectus supplement, provided further that any securities received upon such vesting, settlement, exercise or conversion shall be subject to the terms of the lock-up agreement and (xi) pursuant to a Rule 10b5-1 trading arrangement; provided that (A) in the case of clauses (a)(i), (ii), (iii), (iv), (v) and (vi) above, such transfer or distribution shall not involve a disposition

S-12

for value, (B) in the case of clauses (a)(i), (ii), (iii), (iv), (v) and (vi) above, it shall be a condition to the transfer or distribution that the donee, devisee, transferee or distributee, as the case may be, shall sign and deliver a lock-up agreement in the form of the lock-up agreement, (C) in the case of clauses (a)(ii), (iii), (iv) and (v) above, no filing by any party (including, without limitation, any donor, donee, devisee, transferor, transferee, distributor or distributee) under the Exchange Act, or other public filing, report or announcement reporting a reduction in beneficial ownership of securities subject to the lock-up agreement shall be required or shall be voluntarily made in connection with such transfer or distribution, and (D) in the case of clauses (a)(i), (vi), (vii), (viii), (ix), (x) and (xi) above, no filing under the Exchange Act or other public filing, report or announcement shall be voluntarily made, and if any such filing, report or announcement shall be legally required during the Lock-Up Period, such filing, report or announcement shall clearly indicate in the footnotes thereto the circumstances of such transfer or distribution;

(b) entrance into a written plan meeting the requirements of Rule 10b5-1 under the Exchange Act relating to the transfer, sale or other disposition of the lock-up parties securities, if then permitted by the Company, provided that none of the securities subject to such plan may be transferred, sold or otherwise disposed of until after the expiration of the Lock-Up Period, and no public announcement, report or filing under the Exchange Act, or any other public filing, report or announcement, shall be voluntarily made during the Lock-Up Period regarding the establishment of such plan; provided further that, for the avoidance doubt, any required announcement or filing under the Exchange Act, including disclosures under Regulation S-K Item 408(a), by or on behalf of the undersigned or the Company regarding the establishment of such plan shall be permitted so long as such announcement or filing shall include a statement to the effect that no transfer of any lock-up party's securities may be made under such plan during the Lock-Up Period;

(c) transfer of the lock-up party's securities pursuant to a bona fide third-party tender offer, merger, consolidation or other similar transaction made to all holders of the Company's capital stock involving a change of control of the Company; provided that in the event that such tender offer, merger, consolidation or other similar transaction is not completed, the lock-up party's securities shall remain subject to the provisions of the lock-up agreement;

(d) the sale of shares of Class A Common Stock pursuant to the underwriting agreement or (ii) any exchange or conversion of securities subject to the lock-up agreement solely for or to other securities subject to the lock-up agreement, provided that the securities received shall be subject to the provisions of the lock-up agreement; and

(e) with respect to the Selling Securityholders, transfer of the Selling Securityholders' securities subject to the lock-up agreement pursuant to the pledge, hypothecation or other granting of a security interest in any securities subject to the lock-up agreement to one or more lending institutions as collateral or security for any loan, advance, extension of credit or other similar financing arrangement and any transfer upon foreclosure upon such securities; provided, that (unless entered into prior to the execution of the lock-up agreement) to the extent any such financial institution enforces its security interest during the term of the Lock-Up Period by way of a sale, transfer, appropriation or other disposition, each purchaser or transferee shall execute and deliver to each of the representatives a lock-up agreement in substantially the form of the lock-up agreement in respect of the remainder of the Lock-Up Period; provided, further, that the Selling Securityholders shall provide each of the representatives prior written notice informing them of any public filing, report or announcement made by or on behalf of the Selling Securityholders with respect to thereto.

In connection with the offering, the underwriters may purchase and sell shares of common stock in the open market. These transactions may include short sales, stabilizing transactions and purchases to cover positions created by short sales. Short sales involve the sale by the underwriters of a greater number of shares than they are required to purchase in the offering, and a short position represents the amount of such sales that have not been covered by subsequent purchases. A "covered short position" is a short position that is not greater than the amount of additional shares for which the underwriters' option described above may be exercised. The underwriters may cover any

S-13

covered short position by either exercising their option to purchase additional shares or purchasing shares in the open market. In determining the source of shares to cover the covered short position, the underwriters will consider, among other things, the price of shares available for purchase in the open market as compared to the price at which they may purchase additional shares pursuant to the option described above. "Naked" short sales are any short sales that create a short position greater than the amount of additional shares for which the option described above may be exercised. The underwriters must cover any such naked short position by purchasing shares in the open market. A naked short position is more likely to be created if the underwriters are concerned that there may be downward pressure on the price of the common stock in the open market after pricing that could adversely affect investors who purchase in the offering. Stabilizing transactions consist of various bids for or purchases of common stock made by the underwriters in the open market prior to the completion of the offering.

The underwriters may also impose a penalty bid. This occurs when a particular underwriter repays to the underwriters a portion of the underwriting discount received by it because the representatives have repurchased shares sold by or for the account of such underwriter in stabilizing or short covering transactions.

Purchases to cover a short position and stabilizing transactions, as well as other purchases by the underwriters for their own respective accounts, may have the effect of preventing or retarding a decline in the market price of the Company's stock, and together with the imposition of the penalty bid, may stabilize, maintain or otherwise affect the market price of the common stock. As a result, the price of the common stock may be higher than the price that otherwise might exist in the open market. The underwriters are not required to engage in these activities and may end any of these activities at any time. These transactions may be effected on NASDAQ, in the over-the-counter market or otherwise.

European Economic Area

In relation to each Member State of the European Economic Area (each a "Relevant Member State"), no common shares have been offered or will be offered pursuant to the offering to the public in that Relevant Member State prior to the publication of a prospectus in relation to the common shares which has been approved by the competent authority in that Relevant Member State or, where appropriate, approved in another Relevant Member State and notified to the competent authority in that Relevant Member State, all in accordance with the Prospectus Regulation, except that the common shares may be offered to the public in that Relevant Member State at any time:

provided that no such offer of the common shares shall require the Company and/or Selling Securityholders or any underwriter to publish a prospectus pursuant to Article 3 of the Prospectus Regulation or supplement a prospectus pursuant to Article 23 of the Prospectus Regulation.

For the purposes of this provision, the expression an 'offer to the public' in relation to the common shares in any Relevant Member State means the communication in any form and by any means of sufficient information on the terms of the offer and any Shares to be offered so as to enable an investor to decide to purchase any common shares, and the expression "Prospectus Regulation" means Regulation (EU) 2017/1129.

Each person in a Relevant Member State who receives any communication in respect of, or who acquires any common shares under the offering contemplated hereby will be deemed to have represented, warranted and agreed to and with each of the underwriters and their affiliates and the Company that:

S-14

The Company, the Selling Securityholders, the underwriters and their affiliates, and others will rely upon the truth and accuracy of the foregoing representation, acknowledgement and agreement.

United Kingdom

This prospectus supplement and any other material in relation to the common shares described herein is only being distributed to, and is only directed at, and any investment or investment activity to which this prospectus supplement relates is available only to, and will be engaged in only with persons who are (i) persons having professional experience in matters relating to investments who fall within the definition of investment professionals in Article 19(5) of the Financial Services and Markets Act 2000 (Financial Promotion) Order 2005 ("FPO"); or (ii) high net worth entities falling within Article 49(2)(a) to (d) of the FPO; or (iii) outside the United Kingdom (the "UK") (all such persons together being referred to as "Relevant Persons"). The common shares are only available in the UK to, and any invitation, offer or agreement to purchase or otherwise acquire the common shares will be engaged in only with, the Relevant Persons. This prospectus supplement and its contents are confidential and should not be distributed, published or reproduced (in whole or in part) or disclosed by recipients to any other person in the UK. Any person in the UK that is not a Relevant Person should not act or rely on this prospectus supplement or any of its contents.

No common shares have been offered or will be offered pursuant to the offering to the public in the United Kingdom prior to the publication of a prospectus in relation to the common shares which has been approved by the Financial Conduct Authority, except that the common shares may be offered to the public in the United Kingdom at any time:

provided that no such offer of the common shares shall require the Company, the Selling Securityholders and/or any underwriters or any of their affiliates to publish a prospectus pursuant to Section 85 of the FSMA or supplement a prospectus pursuant to Article 23 of the UK Prospectus Regulation. For the purposes of this provision, the expression an "offer to the public" in relation to the common shares in the United Kingdom means the communication in any form and by any means of sufficient information on the terms of the offer and any common shares to be offered so as to enable an investor to decide to purchase or subscribe for any common shares and the expression "UK Prospectus Regulation" means Regulation (EU) 2017/1129 as it forms part of domestic law by virtue of the European Union (Withdrawal) Act 2018.

Each person in the UK who receives any communication in respect of, or who acquires any common shares under the offering contemplated hereby or to whom any offer is made will be deemed to have represented, acknowledged and agreed to and with the Company, the underwriters and their affiliates that:

S-15

The Company, the underwriters and their affiliates, and others will rely upon the truth and accuracy of the foregoing representation, acknowledgement and agreement.

Canada

The securities may be sold in Canada only to purchasers purchasing, or deemed to be purchasing, as principal that are accredited investors, as defined in National Instrument 45-106 Prospectus Exemptions or subsection 73.3(1) of the Securities Act (Ontario), and are permitted clients, as defined in National Instrument 31-103 Registration Requirements, Exemptions, and Ongoing Registrant Obligations. Any resale of the securities must be made in accordance with an exemption form, or in a transaction not subject to, the prospectus requirements of applicable securities laws.

Securities legislation in certain provinces or territories of Canada may provide a purchaser with remedies for rescission or damages if this prospectus supplement (including any amendment thereto) contains a misrepresentation, provided that the remedies for rescission or damages are exercised by the purchaser within the time limit prescribed by the securities legislation of the purchaser's province or territory. The purchaser should refer to any applicable provisions of the securities legislation of the purchaser's province or territory of these rights or consult with a legal advisor.

Pursuant to section 3A.3 of National Instrument 33-105 Underwriting Conflicts (NI 33-105), the underwriters are not required to comply with the disclosure requirements of NI 33-105 regarding underwriter conflicts of interest in connection with this offering.

Hong Kong

The shares may not be offered or sold in Hong Kong by means of any document other than (i) in circumstances which do not constitute an offer to the public within the meaning of the Companies (Winding Up and Miscellaneous Provisions) Ordinance (Cap. 32 of the Laws of Hong Kong) ("Companies (Winding Up and Miscellaneous Provisions) Ordinance") or which do not constitute an invitation to the public within the meaning of the Securities and Futures Ordinance (Cap. 571 of the Laws of Hong Kong) ("Securities and Futures Ordinance"), or (ii) to "professional investors" as defined in the Securities and Futures Ordinance and any rules made thereunder, or (iii) in other circumstances which do not result in the document being a "prospectus" as defined in the Companies (Winding Up and Miscellaneous Provisions) Ordinance, and no advertisement, invitation or document relating to the shares may be issued or may be in the possession of any person for the purpose of issue (in each case whether in Hong Kong or elsewhere), which is directed at, or the contents of which are likely to be accessed or read by, the public in Hong Kong (except if permitted to do so under the securities laws of Hong Kong) other than with respect to shares which are or are intended to be disposed of only to persons outside Hong Kong or only to "professional investors" in Hong Kong as defined in the Securities and Futures Ordinance and any rules made thereunder.

Singapore

This prospectus supplement has not been registered as a prospectus with the Monetary Authority of Singapore. Accordingly, this prospectus supplement and any other document or material in connection with the

S-16

offer or sale, or invitation for subscription or purchase, of the shares may not be circulated or distributed, nor may the shares be offered or sold, or be made the subject of an invitation for subscription or purchase, whether directly or indirectly, to persons in Singapore other than (i) to an institutional investor (as defined under Section 4A of the Securities and Futures Act, Chapter 289 of Singapore (the "SFA")) under Section 274 of the SFA, (ii) to a relevant person (as defined in Section 275(2) of the SFA) pursuant to Section 275(1) of the SFA, or any person pursuant to Section 275(1A) of the SFA, and in accordance with the conditions specified in Section 275 of the SFA or (iii) otherwise pursuant to, and in accordance with the conditions of, any other applicable provision of the SFA, in each case subject to conditions set forth in the SFA.

Where the shares are subscribed or purchased under Section 275 of the SFA by a relevant person which is a corporation (which is not an accredited investor (as defined in Section 4A of the SFA)) the sole business of which is to hold investments and the entire share capital of which is owned by one or more individuals, each of whom is an accredited investor, the securities (as defined in Section 239(1) of the SFA) of that corporation shall not be transferable for 6 months after that corporation has acquired the shares under Section 275 of the SFA except: (1) to an institutional investor under Section 274 of the SFA or to a relevant person (as defined in Section 275(2) of the SFA), (2) where such transfer arises from an offer in that corporation's securities pursuant to Section 275(1A) of the SFA, (3) where no consideration is or will be given for the transfer, (4) where the transfer is by operation of law, (5) as specified in Section 276(7) of the SFA, or (6) as specified in Regulation 32 of the Securities and Futures (Offers of Investments) (Shares and Debentures) Regulations 2005 of Singapore ("Regulation 32").

Where the shares are subscribed or purchased under Section 275 of the SFA by a relevant person which is a trust (where the trustee is not an accredited investor (as defined in Section 4A of the SFA)) whose sole purpose is to hold investments and each beneficiary of the trust is an accredited investor, the beneficiaries' rights and interest (howsoever described) in that trust shall not be transferable for 6 months after that trust has acquired the shares under Section 275 of the SFA except: (1) to an institutional investor under Section 274 of the SFA or to a relevant person (as defined in Section 275(2) of the SFA), (2) where such transfer arises from an offer that is made on terms that such rights or interest are acquired at a consideration of not less than S$200,000 (or its equivalent in a foreign currency) for each transaction (whether such amount is to be paid for in cash or by exchange of securities or other assets), (3) where no consideration is or will be given for the transfer, (4) where the transfer is by operation of law, (5) as specified in Section 276(7) of the SFA, or (6) as specified in Regulation 32.

Japan

The securities have not been and will not be registered under the Financial Instruments and Exchange Act of Japan (Act No. 25 of 1948, as amended), or the FIEA. The securities may not be offered or sold, directly or indirectly, in Japan or to or for the benefit of any resident of Japan (including any person resident in Japan or any corporation or other entity organized under the laws of Japan) or to others for reoffering or resale, directly or indirectly, in Japan or to or for the benefit of any resident of Japan, except pursuant to an exemption from the registration requirements of the FIEA and otherwise in compliance with any relevant laws and regulations of Japan.

The Company and the Selling Securityholders estimate that their share of the total expenses of the offering, excluding underwriting discounts and commissions, will be approximately $1.2 million. The Company has agreed to reimburse the underwriters for certain out-of-pocket expenses incurred in connection with this offering, in an amount not to exceed $25,000.

The Company and the Selling Securityholders have agreed to indemnify the several underwriters against certain liabilities, including liabilities under the Securities Act.

The underwriters and their respective affiliates are full service financial institutions engaged in various activities, which may include sales and trading, commercial and investment banking, advisory, investment

S-17

management, investment research, principal investment, hedging, market making, brokerage and other financial and non-financial activities and services. Certain of the underwriters and their respective affiliates have provided, and may in the future provide, a variety of these services to the issuer and to persons and entities with relationships with the issuer, for which they received or will receive customary fees and expenses.

In the ordinary course of their various business activities, the underwriters and their respective affiliates, officers, directors and employees may purchase, sell or hold a broad array of investments and actively trade securities, derivatives, loans, commodities, currencies, credit default swaps and other financial instruments for their own respective accounts and for the accounts of their customers, and such investment and trading activities may involve or relate to assets, securities and/or instruments of the issuer (directly, as collateral securing other obligations or otherwise) and/or persons and entities with relationships with the issuer. The underwriters and their respective affiliates may also communicate independent investment recommendations, market color or trading ideas and/or publish or express independent research views in respect of such assets, securities or instruments and may at any time hold, or recommend to clients that they should acquire, long and/or short positions in such assets, securities and instruments.

S-18

VALIDITY OF SECURITIES

The validity of our Class A Common Stock offered hereby will be passed upon by Sullivan & Cromwell LLP. Certain legal matters in connection with this offering will be passed upon for the underwriters by Skadden, Arps, Slate, Meagher & Flom LLP, New York, New York. Certain legal matters in connection with this offering will be passed upon for the Selling Securityholders by Latham & Watkins LLP.

EXPERTS

The audited financial statements incorporated by reference in this prospectus supplement and elsewhere in the registration statement have been so incorporated by reference in reliance upon the report of Grant Thornton LLP, independent registered public accountants, upon the authority of said firm as experts in accounting and auditing.

S-19

WHERE YOU CAN FIND MORE INFORMATION

We have filed with the SEC a registration statement on Form S-3 with respect to the securities offered by this prospectus supplement. This prospectus supplement and the accompanying prospectus are a part of that registration statement and do not contain all of the information included in the registration statement. For further information pertaining to us, the Selling Securityholders and our securities, you should refer to the registration statement and to its exhibits. Statements contained in or incorporated by reference into this prospectus supplement concerning the contents of any contract or any other document are not necessarily complete. If a contract or document has been filed as an exhibit to the registration statement or one of our filings with the SEC that is incorporated by reference into the registration statement, we refer you to the copy of the contract or document that has been filed. Each statement contained in or incorporated by reference into this prospectus supplement relating to a contract or document filed as an exhibit is qualified in all respects by the filed exhibit.

We are subject to the information reporting requirements of the Exchange Act, and we file annual, quarterly and current reports, proxy statements and other information with the SEC. Our SEC filings are available to the public over the internet at the SEC's website at www.sec.gov and on our website at www.symbotic.com. All internet addresses provided in this prospectus supplement or the accompanying prospectus are for informational purposes only and are not intended to be hyperlinks. In addition, the information on, or accessible through, our website, or any other website described herein, is not a part of, and is not incorporated or deemed to be incorporated by reference in, this prospectus supplement or the accompanying prospectus or other offering materials.

S-20

INFORMATION WE INCORPORATE BY REFERENCE

The SEC allows us to "incorporate by reference" into this prospectus supplement the information in documents we file with it, which means that we can disclose important information to you by referring you to those documents. The information incorporated by reference is considered to be a part of this prospectus supplement, and information that we file later with the SEC will automatically update and supersede this information. Any statement contained in any document incorporated or deemed to be incorporated by reference herein shall be deemed to be modified or superseded for purposes of this prospectus supplement to the extent that a statement contained in or omitted from this prospectus supplement or free writing prospectus, or in any other subsequently filed document that also is or is deemed to be incorporated by reference herein, modifies or supersedes such statement. Any such statement so modified or superseded shall not be deemed, except as so modified or superseded, to constitute a part of this prospectus supplement.

We are incorporating by reference in this prospectus supplement, and have incorporated by reference in the accompanying prospectus, the documents listed below, which we have already filed with the SEC, and any future filings we make with the SEC under Sections 13(a), 13(c), 14 or 15(d) of the Exchange Act, except in each case as to any portion of any report or document that is deemed furnished to the SEC and not deemed filed under such provisions:

We will not, however, incorporate by reference in this prospectus supplement any documents or portions thereof that are not deemed "filed" with the SEC, including any information furnished pursuant to Item 2.02 or Item 7.01 of our current reports on Form 8-K unless, and except to the extent, specified in such current reports.

We will provide you with a copy of any of these filings (other than an exhibit to these filings, unless the exhibit is specifically incorporated by reference into the filing requested) and any other information incorporated by reference hereto at no cost, if you submit a request to us by writing or telephoning us at the following address and telephone number:

Symbotic Inc.

200 Research Drive

Wilmington, MA 01887

Telephone: (978) 284-2800

Attention: Corporate Secretary

S-21

PROSPECTUS

Class A Common Stock

Preferred Stock

Debt Securities

Offered by Symbotic Inc.

Up to 48,915,312 Shares of Class A Common Stock

Offered by the Selling Securityholders

This prospectus relates to the offer and sale from time to time by us of Class A common stock, par value $0.0001 per share ("Class A Common Stock"), preferred stock and debt securities described herein. This prospectus also relates to the offer and sale from time to time by the selling securityholders identified in this prospectus or their permitted transferees (the "Selling Securityholders"), of up to an aggregate of 48,915,312 shares of Class A Common Stock, 31,090,000 of which were purchased at a price of, or acquired based on a value of $10.00 per share, by certain of the Selling Securityholders. We will not receive any proceeds from the sale of Class A Common Stock by the Selling Securityholders pursuant to this prospectus.

We will bear all costs, expenses and fees in connection with the registration of the securities we offer on a primary basis. The Selling Securityholders will bear all commissions and discounts, if any, attributable to their respective sales of the shares of Class A Common Stock.

We may offer and sell the securities directly, through agents we select from time to time or to or through underwriters or dealers we select, or through a combination of these methods. In addition, the Selling Securityholders may offer and sell our securities from time to time. We will provide specific information about any Selling Securityholders in one or more supplements to this prospectus. If we, or the Selling Securityholders, use any agents, underwriters or dealers to sell the securities, we will name them and describe their compensation in a prospectus supplement. The price to the public of those securities and the net proceeds we, or any Selling Securityholders, expect to receive from that sale will also be set forth in a prospectus supplement.

Our registration of the securities covered by this prospectus does not mean that either we, or the Selling Securityholders, will issue, offer or sell, as applicable, any of the securities. The Selling Securityholders may offer and sell the securities covered by this prospectus in a number of different ways and at varying prices. We provide more information about how the Selling Securityholders may sell the securities in the section entitled "Plan of Distribution" and in supplements or amendments to this prospectus as applicable.

Specific terms of the securities to be offered will be provided in one or more supplements to this prospectus. The specific plan of distribution for any securities to be offered will also be provided in a prospectus supplement. Prospectus supplements may also add, update or change information in this prospectus. You should read this prospectus and any prospectus supplement or amendment carefully before you invest in our securities.

Our Class A Common Stock is listed on the Nasdaq Global Market ("NASDAQ") under the symbol "SYM."

Investing in our securities involves risks that are described in the "Risk Factors" section beginning on page 2 of this prospectus and any risk factors described in any applicable prospectus supplement and in the documents we incorporate by reference.

Neither the Securities and Exchange Commission nor any state securities commission has approved or disapproved of the securities to be issued under this prospectus or determined if this prospectus is truthful or complete. Any representation to the contrary is a criminal offense.

The date of this prospectus is December 3, 2025.

TABLE OF CONTENTS

i

ABOUT THIS PROSPECTUS

This prospectus is part of a registration statement on Form S-3 that we filed with the Securities and Exchange Commission (the "SEC") using the automatic "shelf" registration process. Under this shelf registration process, the Selling Securityholders may, from time to time, sell the securities offered by them described in this prospectus. We will receive proceeds from the sale by us of the securities offered by us but will not receive any proceeds from the sale by the Selling Securityholders of the securities offered by them, as described in this prospectus.

Neither we nor the Selling Securityholders have authorized anyone to provide you with any information or to make any representations other than those contained in this prospectus, any applicable prospectus supplement, or any free writing prospectuses prepared by or on behalf of us or to which we have referred you. Neither we nor the Selling Securityholders take responsibility for, and can provide no assurance as to the reliability of, any other information that others may give you. Neither we nor the Selling Securityholders will make an offer to sell these securities in any jurisdiction where the offer or sale is not permitted.

We may also provide a prospectus supplement or post-effective amendment to the registration statement to add information to, or update or change information contained in, this prospectus. You should read both this prospectus and any applicable prospectus supplement or post-effective amendment to the registration statement together with the additional information incorporated herein by reference or to which we refer you in the section of this prospectus entitled "Where You Can Find More Information." You should assume that the information contained or incorporated by reference in this prospectus or any prospectus supplement is accurate only as of the date on the front of those documents, regardless of the time of delivery of this prospectus or any applicable prospectus supplement, or any sale of a security. Our business, financial condition, results of operations and prospects may have changed since those dates.

This prospectus and the information incorporated herein by reference contains summaries of certain provisions contained in some of the documents described herein, but reference is made to the actual documents for complete information. All of the summaries are qualified in their entirety by the actual documents. Copies of some of the documents referred to herein have been filed, will be filed or will be incorporated by reference as exhibits to the registration statement of which this prospectus is a part, and you may obtain copies of those documents as described below under "Where You Can Find More Information."

Unless the context indicates otherwise, references in this prospectus to the "Company," "Symbotic," "we," "us," "our" and similar terms refer to SVF Investment Corp. 3 ("SVF 3") prior to the Business Combination (the "Business Combination") described in our Form 10-K (as defined below) and Symbotic Inc. and its consolidated subsidiaries following the Business Combination.

1

RISK FACTORS

Investing in our securities involves risks. You should carefully consider and evaluate the risk factors discussed below and under the heading "Risk Factors" in our most recent Annual Report on Form 10-K and subsequent Quarterly Reports on Form 10-Q that we file with the SEC, which are incorporated herein by reference, together with the risk factors and other information contained in or incorporated by reference into this prospectus and the applicable prospectus supplement, before making an investment decision. The occurrence of one or more of the events or circumstances described in these risk factors, alone or in combination with other events or circumstances, may have a material adverse effect on our business, reputation, revenue, financial condition, results of operations and future prospects, in which case the market price of our securities could decline, and you could lose part or all of your investment. The risks and uncertainties described in the documents incorporated by reference herein are not the only risks and uncertainties that we may face.

For more information about our SEC filings, please see "Where You Can Find More Information" and "Information We Incorporate by Reference."

Risks Related to Ownership of Our Common Stock

The securities being offered in this prospectus represent a substantial percentage of our outstanding Class A Common Stock, and the sales of such securities could cause the market price of our Class A Common Stock to decline significantly, despite the fact that certain existing stockholders who purchased securities in the Company at a price below the current trading price of such securities may experience a positive rate of return. The public stockholders may not experience a similar rate of return.

This prospectus relates, among other things, to the offer of Class A Common Stock by us and the offer and resale from time to time by the Selling Securityholders of up to 48,915,312 shares of Class A Common Stock, 31,090,000 of which were purchased at a price of, or acquired based on a value of $10.00 per share, by certain of the Selling Securityholders.

The market price for our Class A Common Stock could decline as a result of the sales of our Class A Common Stock offered by us and the Selling Securityholders pursuant to this prospectus, and such declines could be significant. The Class A Common Stock offered by us and the Selling Securityholders pursuant to this prospectus represent a substantial percentage of our total outstanding common stock as of the date of this prospectus. The sale of all securities being offered in this prospectus could result in a significant decline in the public trading price of our Class A Common Stock. Despite such a decline in the public trading price, the Selling Securityholders may still experience a positive rate of return on the securities they purchased due to the difference in the prices at which the Selling Securityholders purchased their shares of Class A Common Stock. Based on the closing price of our Class A Common Stock on December 2, 2025, which was $66.95 per share, the Class A Common Stock offered by the Selling Securityholders pursuant to this prospectus may experience potential profit of up to $55.95 per share. The public securityholders may not experience a similar rate of return on the securities they purchase due to differences in the purchase prices and the current trading price.

2

CAUTIONARY NOTE REGARDING FORWARD-LOOKING STATEMENTS

This prospectus contains forward-looking statements within the meaning of the Private Securities Litigation Reform Act of 1995, Section 27A of the Securities Act of 1933, as amended, which we refer to as the Securities Act, and Section 21E of the Securities Exchange Act of 1934, as amended, which we refer to as the Exchange Act. These statements include, but are not limited to, our expectations or predictions of future financial or business performance or conditions. Forward-looking statements are inherently subject to risks, uncertainties and assumptions, both known and unknown, including, but not limited to, those described in the "Risk Factors" section of our Annual Report on Form 10-K and Quarterly Reports on Form 10-Q. Generally, statements that are not historical facts, including statements concerning our possible or assumed future actions, business strategies, events, backlog, or results of operations, are forward-looking statements. These statements may be preceded by, followed by or include the words "believes," "estimates," "expects," "projects," "forecasts," "may," "will," "should," "seeks," "plans," "scheduled," "anticipates," or "intends" or similar expressions.

Such forward-looking statements involve risks and uncertainties that may cause actual events, results or performance to differ materially from those indicated by such statements. Certain of these risks are identified and discussed in other sections of this prospectus and in the documents we incorporate by reference, including those described in the section captioned "Risk Factors" in our most recent Annual Report on Form 10-K, and any updates to those Risk Factors in our most recent Quarterly Report on Form 10-Q. These risk factors will be important to consider in determining future results and should be reviewed in their entirety. These forward-looking statements are expressed in good faith, and we believe there is a reasonable basis for them. However, there can be no assurance that the events, results or trends identified in these forward-looking statements will occur or be achieved. Forward-looking statements are provided for the purposes of assisting the reader in understanding our financial performance, financial position and cash flows as of and for periods ended on certain dates and to present information about management's current expectations and plans relating to the future, and the reader is cautioned not to place undue reliance on these forward-looking statements because of their inherent uncertainty and to appreciate the limited purposes for which they are being used by management. While we believe that the assumptions and expectations reflected in the forward-looking statements are reasonable based on information currently available to management, there is no assurance that such assumptions and expectations will prove to have been correct.

The forward-looking statements made in this prospectus relate only to events as of the date on which the statements are made and are based on the beliefs, estimates, expectations and opinions of management on that date. You should review carefully the section captioned "Risk Factors" in this prospectus, the section captioned "Risk Factors" in our most recent Annual Report on Form 10-K and Quarterly Report on Form 10-Q, and in the sections captioned "Management's Discussion and Analysis of Financial Condition and Results of Operations" in our most recent Annual Report on Form 10-K and Quarterly Report on Form 10-Q for a more complete discussion of these and other factors that may affect our business. We are not under any obligation, and expressly disclaim any obligation, to update, alter or otherwise revise any forward-looking statements made in this prospectus, whether as a result of new information, future events or otherwise, except as required by law.

3

THE COMPANY

Symbotic Inc. is a Delaware corporation. Our vision is to make the supply chain work better for everyone. We do this by developing, commercializing, and deploying innovative, comprehensive technology solutions that dramatically improve supply chain operations. We automate the processing of pallets, cases, and items (known as eaches) in large warehouses.

Corporate Information

Our principal executive offices are located at 200 Research Drive, Wilmington, Massachusetts 01887 and our telephone number at that address is (978) 284-2800. Our website is located at www.symbotic.com. We do not incorporate the information contained on, or accessible through, our corporate website into this prospectus, and you should not consider it part of this prospectus. We have included our website address only as an inactive textual reference and do not intend it to be an active link to our website.

4

USE OF PROCEEDS

Unless otherwise indicated in a prospectus supplement, the net proceeds from our sale of securities will be used for general corporate purposes.

All of the Class A Common Stock offered by the Selling Securityholders pursuant to this prospectus will be sold by the Selling Securityholders for their respective accounts. We will not receive any proceeds from the sale of our securities by the Selling Securityholders pursuant to this prospectus.

DESCRIPTION OF CAPITAL STOCK

As of December 2, 2025, Symbotic had one class of securities registered under Section 12 of the Exchange Act: our Class A Common Stock.

The rights of Symbotic stockholders are governed by Delaware law, our charter (the "Charter") and bylaws (the "Bylaws"). The following description of the terms of Symbotic's capital stock is not complete and is qualified in its entirety by reference to the applicable provisions of Delaware law as well as the Charter and Bylaws incorporated by reference herein. We urge you to read the applicable provisions of Delaware law as well as the Charter and Bylaws, incorporated by reference to this prospectus, respectively, carefully and in their entirety because they describe your rights as a Symbotic stockholder.

Authorized and Outstanding Stock

The Charter authorizes the issuance of shares, each with a par value of $0.0001 per share, consisting of:

Class A Common Stock

As of December 2, 2025, there are 113,911,644 shares of Class A Common Stock outstanding. All shares of Class A Common Stock are fully paid and non-assessable.

Voting rights. Each holder of Class A Common Stock is entitled to one vote for each share of Class A Common Stock held of record by such holder on all matters submitted to a vote of the stockholders. Holders of Class A Common Stock will vote together with other holders of common stock as a single class on all matters (or, if any holders of any series of preferred stock are entitled to vote together with the holders of common stock, as a single class with the holders of such series of preferred stock). Notwithstanding the foregoing, the holders of shares of any series of common stock will be entitled to vote as a separate class upon any amendment to the Charter (including by merger, consolidation, reorganization or similar event) that would adversely alter or change the powers, preferences or special rights of such series of common stock. Except as expressly required by law, holders of common stock, as such, will not be entitled to vote on any amendment to the Charter (including any certificate of designation) that relates solely to the rights, powers, preferences (or the qualifications, limitations or restrictions thereof) or other terms of one or more outstanding series of preferred stock if the holders of such affected series are entitled, either separately or together with the holders of one or more other such series, to vote thereon pursuant to the Charter (including any certificate of designation) or pursuant to the Delaware General Corporation Law, as amended (the "DGCL").

5

Dividend rights. Subject to the rights and preferences of any holders of any outstanding series of preferred stock, the holders of Class A Common Stock will be entitled to the payment of dividends and other distributions of cash, stock or property on the Class A Common Stock when, as and if declared by the board of directors in accordance with law.

Rights upon liquidation. Subject to the rights and preferences of any holders of any shares of any outstanding series of preferred stock, in the event of any liquidation, dissolution or winding up, whether voluntary or involuntary, our funds and assets that may be legally distributed to our stockholders will be distributed among the holders of the then-outstanding Class A Common Stock pro rata in accordance with the number of shares of Class A Common Stock held by each such holder.

Other rights. The holders of Class A Common Stock have no preemptive or conversion rights or other subscription rights. There are no redemption or sinking fund provisions applicable to the Class A Common Stock. The rights, preferences and privileges of holders of the Class A Common Stock will be subject to those of the holders of any shares of the preferred stock we may issue in the future.

Class V-1 Common Stock and Class V-3 Common Stock

As of December 2, 2025, there are 74,296,208 shares of Class V-1 common stock and 403,559,196 shares of Class V-3 common stock outstanding. All shares of Class V-1 common stock and Class V-3 common stock are fully paid and non-assessable.

Voting rights. Each holder of Class V-1 common stock is entitled to one vote for each share of Class V-1 common stock held of record by such holder on all matters submitted to a vote of the stockholders, and each holder of Class V-3 common stock is entitled to three votes for each share of Class V-3 common stock held of record by such holder on all matters submitted to a vote of the stockholders. Holders of Class V-1 common stock and Class V-3 common stock will vote together with other holders of common stock as a single class on all matters (or, if any holders of any series of preferred stock are entitled to vote together with the holders of common stock, as a single class with the holders of such series of preferred stock). Notwithstanding the foregoing, the holders of shares of any series of common stock will be entitled to vote as a separate class upon any amendment to the Charter (including by merger, consolidation, reorganization or similar event) that would adversely alter or change the powers, preferences or special rights of such series of common stock. Except as expressly required by law, holders of common stock, as such, will not be entitled to vote on any amendment to the Charter (including any certificate of designation) that relates solely to the rights, powers, preferences (or the qualifications, limitations or restrictions thereof) or other terms of one or more outstanding series of preferred stock if the holders of such affected series are entitled, either separately or together with the holders of one or more other such series, to vote thereon pursuant to the Charter (including any certificate of designation) or pursuant to the DGCL.

Dividend rights. Except as provided in the Charter with respect to certain stock adjustments, dividends of cash or property may not be declared or paid on shares of Class V-1 common stock or Class V-3 common stock.

Rights upon liquidation. The holders of shares of Class V-1 common stock and Class V-3 common stock will not be entitled to receive any assets of Symbotic in the event of any voluntary or involuntary liquidation, dissolution or winding up of Symbotic.

Other rights. The holders of Class V-1 common stock and Class V-3 common stock have no preemptive or other subscription rights. There are no sinking fund provisions applicable to the Class V-1 common stock or Class V-3 common stock. The rights, preferences and privileges of holders of the Class V-1 common stock and Class V-3 common stock will be subject to those of the holders of any shares of the preferred stock we may issue in the future. Subject to the terms of the New Symbotic Holdings' Second Amended and Restated LLC Agreement (the "New Symbotic Holdings LLC Agreement"), holders of New Symbotic Holdings common units

6

may cause us to redeem all or any portion of such holder's New Symbotic Holdings common units, and in connection with such redemption, we may be required to deliver Class A common units to such holder.

Conversion of Class V-3 Common Stock. Class V-3 common stock converts into Class V-1 common stock in certain situations, including automatically seven years following the Business Combination.

Transfer of Class V-1 Common Stock and Class V-3 Common Stock. No holder of Class V-1 common stock or Class V-3 common stock may transfer such shares to any person unless such holder also simultaneously transfers an equal number of such holder's New Symbotic Holdings common units to the same person in accordance with the terms of the New Symbotic Holdings LLC Agreement. Upon a transfer of New Symbotic Holdings common units in accordance with the New Symbotic Holdings LLC Agreement, an equal number of shares of Class V-1 common stock and/or Class V-3 common stock that correspond to such New Symbotic Holdings common units will automatically and simultaneously be transferred to the same transferee of such New Symbotic Holdings common units. Any attempted or purported transfer of shares of Class V-1 common stock and Class V-3 common stock in violation of the foregoing restrictions will be null and void.

Cancellation of Class V-1 Common Stock and Class V-3 Common Stock. In the event that any outstanding share of Class V-1 common stock or Class V-3 common stock ceases to be held directly or indirectly by a holder of a New Symbotic Holdings common units, such share will automatically be transferred to Symbotic and cancelled for no consideration.

Further Issuance of Class V-3 Common Stock. We will not issue additional shares of Class V-3 common stock.

Preferred Stock

As of the date hereof, no preferred stock is issued and outstanding. The Charter authorizes our board of directors to establish one or more series of preferred stock. Unless required by law or any stock exchange, the authorized shares of preferred stock are available for issuance without further action by the holders of the common stock. The board of directors has the discretion to determine the voting powers and the designations, preferences and relative, participating, optional or other special rights, and qualifications, limitations or restrictions thereof, including, without limitation, dividend rights, conversion rights, redemption privileges and liquidation preferences, of each series of preferred stock.

The issuance of preferred stock may have the effect of delaying, deferring or preventing a change in control of Symbotic without further action by the stockholders. Additionally, the issuance of preferred stock may adversely affect the holders of the common stock by restricting dividends on the common stock, diluting the voting power of the common stock or subordinating the liquidation rights of the common stock. As a result of these or other factors, the issuance of preferred stock could have an adverse impact on the market price of the common stock.

Dividends

Declaration and payment of any dividend will be subject to the discretion of our board of directors. The timing and amount of dividends will be dependent upon, among other things, our business prospects, results of operations, financial condition, cash requirements and availability, debt repayment obligations, capital expenditure needs, contractual restrictions, covenants in the agreements governing current and future indebtedness, industry trends, the provisions of Delaware law affecting the payment of dividends and distributions to stockholders and any other factors or considerations our board of directors may regard as relevant.

7

We currently intend to retain all available funds and any future earnings to fund the development and growth of the business and therefore do not anticipate declaring or paying any cash dividends on common stock in the foreseeable future.

Anti-Takeover Provisions

The Charter and Bylaws contain provisions that may delay, defer or discourage another party from acquiring control of us. We expect that these provisions, which are summarized in this section, will discourage coercive takeover practices or inadequate takeover bids. These provisions are also designed to encourage persons seeking to acquire control of us to first negotiate with our board of directors, which may result in an improvement of the terms of any such acquisition in favor of the stockholders. However, they also give our board of directors the power to discourage acquisitions that some stockholders may favor.

These provisions include:

Authorized but Unissued Shares. The authorized but unissued shares of our common stock and preferred stock are available for future issuance without stockholder approval, subject to any limitations imposed by the listing standards of NASDAQ. These additional shares may be used for a variety of corporate finance transactions, acquisitions and employee benefit plans. The existence of authorized but unissued and unreserved common stock and preferred stock could make more difficult or discourage an attempt to obtain control of us by means of a proxy contest, tender offer, merger or otherwise.

Business Combinations. Symbotic will not be governed by Section 203 of the DGCL. In general, Section 203 prohibits a publicly held Delaware corporation from engaging in a business combination, such as a merger, with an "interested stockholder" (which includes a person or group owning 15% or more of the corporation's voting stock) for a period of three years following the date the person became an interested stockholder, unless (with certain exceptions) the business combination or the transaction in which the person became an interested stockholder is approved in a prescribed manner. Accordingly, Symbotic will not be subject to any anti-takeover effects of Section 203. Nevertheless, the Charter contains provisions that will have a similar effect to Section 203, which will take effect from and after the Restriction Effective Time, except that such restrictions on business combinations shall not apply to any interested stockholder that became such prior to the Restriction Effective Time.

Stockholder Action; Special Meetings of Stockholders. The Charter provides that stockholders may not take action by written consent, but may only take action at annual or special meetings of stockholders. As a result, a holder controlling a majority of Symbotic capital stock would not be able to amend our bylaws or remove directors without holding a meeting of stockholders called in accordance with our bylaws. Further, the Charter provides that special meetings of our stockholders may be called, for any purpose or purposes, at any time only by or at the direction of our board of directors, the chairperson of Symbotic's board of directors or the Chief Executive Officer, and will not be called by any other person or persons. These provisions might delay the ability of stockholders to force consideration of a proposal or for stockholders controlling a majority of Symbotic capital stock to take any action, including the removal of directors.

Advance Notice Requirements for Stockholder Proposals and Director Nominations. In addition, our Bylaws established an advance notice procedure for stockholder proposals to be brought before an annual meeting or special meeting of stockholders. Generally, in order for any matter to be "properly brought" before a meeting, the matter must be (i) specified in a notice of meeting given by or at the direction of our board of directors, (ii) if not specified in a notice of meeting, otherwise brought before the meeting by the board of directors, or (iii) otherwise properly brought before the meeting by a stockholder who (a) was a stockholder on the date of giving the notice, on the record date for the determination of the stockholders entitled to vote at the meeting and at the time of the meeting, (b) entitled to vote at the meeting, and (c) has complied with the advance notice procedures specified in our Bylaws or properly made such proposal in accordance with Rule 14a-8 under

8

the Exchange Act and the rules and regulations thereunder, which proposal has been included in the proxy statement for the annual meeting. Stockholders may not nominate persons for election to our board of directors at any special meeting of stockholders.

Further, for business and nominations of persons for election to the board of directors to be properly brought before an annual meeting by a stockholder, the stockholder must (i) provide Timely Notice (as defined below) thereof in writing and in proper form to the Secretary and (ii) provide any updates or supplements to such notice at the times and in the forms required by the Bylaws.

To be timely, a stockholder's notice must be received in accordance with an "Acceptable Delivery Method" not earlier than the 120^th day, and not later than the 90^th day, prior to the first anniversary of the preceding year's annual meeting of stockholders; provided, however, that in the event that no annual meeting was held in the previous year or the annual meeting is called for a date that is more than 30 days earlier or delayed (other than as a result of adjournment or recess) by more than 60 days later than such anniversary date, or, if the first public disclosure of the date of such annual meeting is less than 100 days prior to the date of such annual meeting, such stockholders' notice must be received no earlier than the 120^th day prior to such annual meeting and not later than the later of (1) the 90^th day prior to such annual meeting and (2) the 10^th day following the day on which public disclosure of the date of such annual meeting is first made by the Company (such notice within such time periods, "Timely Notice").

Stockholders at an annual meeting or special meeting may only consider proposals or nominations properly brought before a meeting of stockholders. These provisions could have the effect of delaying stockholder actions that are favored by the holders of a majority of the outstanding voting securities until the next stockholder meeting.

Amendment of Charter or Bylaws. Our Bylaws may be amended or repealed by a majority vote of the board of directors or by the holders of at least sixty-six and two-thirds percent (66 2/3%) of the voting power of all of the then-outstanding shares entitled to vote generally in the election of directors, voting together as a single class. The affirmative vote of a majority of the board of directors and at least sixty-six and two-thirds percent (66 2/3%) in voting power of the outstanding shares entitled to vote thereon would be required to amend certain provisions of the Charter.

Quorum

Our Bylaws provide that, at any meeting of the board of directors, a majority of the total number of directors then in-office constitutes a quorum.

No Cumulative Voting

Under Delaware law, the right to vote cumulatively does not exist unless the certificate of incorporation expressly authorizes cumulative voting. The Charter does not authorize cumulative voting.

Limitations on Liability and Indemnification of Officers and Directors

Our Charter and Bylaws provide indemnification and advancement of expenses for the directors and officers to the fullest extent permitted by the DGCL, subject to certain limited exceptions. We have entered into indemnification agreements with each of our directors and officers. In some cases, the provisions of those indemnification agreements may be broader than the specific indemnification provisions contained under Delaware law. In addition, as permitted by Delaware law, the Charter and Bylaws include provisions that eliminate the personal liability of directors for monetary damages resulting from breaches of certain fiduciary duties as a director. The effect of this provision is to restrict our rights and the rights of our stockholders in derivative suits to recover monetary damages against a director for breach of fiduciary duties as a director.

9

These provisions may be held not to be enforceable for violations of the federal securities laws of the United States.

Dissenters' Rights of Appraisal and Payment

Under the DGCL, with certain exceptions, Symbotic's stockholders will have appraisal rights in connection with a merger or consolidation of Symbotic. Pursuant to Section 262 of the DGCL, stockholders who properly demand and perfect appraisal rights in connection with such merger or consolidation will have the right to receive payment of the fair value of their shares as determined by the Delaware Court of Chancery.

Stockholders' Derivative Actions

Under the DGCL, any of our stockholders may bring an action in the company's name to procure a judgment in its favor, also known as a derivative action, provided that the stockholder bringing the action is a holder of our shares at the time of the transaction to which the action relates.

Forum Selection

The Charter provides that unless we consent in writing to the selection of an alternative forum, to the fullest extent permitted by applicable law, the Court of Chancery of the State of Delaware will be the sole and exclusive forum for any internal or intra-corporate claim or any action asserting a claim governed by the internal affairs doctrine as defined by the laws of the State of Delaware, including, but not limited to, (i) any derivative action or proceeding brought on behalf of Symbotic; (ii) any action asserting a claim of breach of a fiduciary duty owed by any director, officer or other employee or stockholder of Symbotic to Symbotic or its stockholders; or (iii) any action asserting a claim arising pursuant to any provision of the DGCL or the Charter or the Bylaws, or as to which the DGCL confers jurisdiction on the Court of Chancery of the State of Delaware, will be a state court located within the State of Delaware (or, if no court located within the State of Delaware has jurisdiction, the federal district court for the District of Delaware). Further, unless we consent in writing to the selection of an alternative forum, to the fullest extent permitted by applicable law, the sole and exclusive forum for any action asserting a cause of action arising under the Securities Act and the rules and regulations promulgated thereunder will be the federal district court for the District of Delaware (or if such court does not have jurisdiction over such action, any other federal district court) of the United States; provided that, if such forum is illegal, invalid or unenforceable, the sole and exclusive forum for any action asserting a cause of action arising under the Securities Act will be the Court of Chancery of the State of Delaware.

Stockholder Registration Rights

Symbotic entered into the A&R Registration Rights Agreement, pursuant to which, among other things, SVF Sponsor III (DE) LLC, certain of SVF 3's independent directors and certain Symbotic equityholders have specified rights to require Symbotic to register all or a portion of their shares under the Securities Act. Certain stockholders also have certain customary registration rights pursuant to the Subscription Agreements that SVF 3 entered into with such parties on December 21, 2021, pursuant to which the subscribers collectively subscribed for 20,500,000 shares of Class A Common Stock at $10.00 per share, for an aggregate commitment amount of $205,000,000.

Trading Symbol and Market

Our Class A Common Stock is listed on NASDAQ under the symbol "SYM."

10

DESCRIPTION OF DEBT SECURITIES

The following description, together with the additional information we include in any applicable prospectus supplement, summarizes certain general terms and provisions of the debt securities that we may offer in one or more series under this prospectus. When we offer to sell a particular series of debt securities, we will describe the specific terms of the series in a supplement to this prospectus. We will also indicate in the supplement to what extent the general terms and provisions described in this prospectus apply to a particular series of debt securities.

We may issue debt securities either separately, or together with, or upon the conversion or exercise of or in exchange for, other securities described in this prospectus. Debt securities may be our senior, senior subordinated or subordinated obligations and, unless otherwise specified in a supplement to this prospectus, the debt securities will be our direct, unsecured obligations.

The debt securities will be issued under an indenture between us and a trustee to be named therein. We have summarized select portions of the form of indenture below. The summary is not complete. The form of the indenture has been filed as an exhibit to the registration statement and you should read the indenture for provisions that may be important to you.

General

We can issue an unlimited amount of debt securities under the indenture that may be in one or more series with the same or various maturities, at par, at a premium, or at a discount. The terms of each series of debt securities will be established by or pursuant to a resolution of our board of directors and set forth in an officer's certificate or a supplemental indenture. The particular terms of each series of debt securities will be described in a prospectus supplement relating to such series (including any pricing supplement or term sheet), including the following terms, if applicable:

11

We may issue debt securities that provide for an amount less than their stated principal amount to be due and payable upon maturity or a declaration of acceleration of their maturity following an event of default pursuant to the terms of the indenture. We will provide you with information on the federal income tax considerations and other special considerations applicable to any of these debt securities in the applicable prospectus supplement.

If we denominate the purchase price of any of the debt securities in a foreign currency or currencies or a foreign currency unit or units, or if the principal of and any premium and interest on any series of debt securities is payable in a foreign currency or currencies or a foreign currency unit or units, we will provide you with information on the restrictions, elections, general tax considerations, specific terms and other information with respect to that issue of debt securities and such foreign currency or currencies or foreign currency unit or units in the applicable prospectus supplement.

Transfer and Exchange

Each debt security will be represented by either one or more global securities registered in the name of The Depository Trust Company, or the depositary, or a nominee of the depositary (we will refer to any such debt

12

security as a "global debt security"), or a certificate issued in definitive registered form (we will refer to any debt security represented by a certificate as a "certificated debt security") as set forth in the applicable prospectus supplement. Except as set forth below, global debt securities will not be issuable in certificated form.

Certificated Debt Securities. You may transfer or exchange certificated debt securities at any office we maintain for this purpose in accordance with the terms of the indenture. No service charge will be made for any transfer or exchange of certificated debt securities, but we may require payment of a sum sufficient to cover any tax or other governmental charge payable in connection with a transfer or exchange.

You may effect the transfer of certificated debt securities and the right to receive the principal of, premium and interest on certificated debt securities only by surrendering the certificate representing those certificated debt securities and either reissuance by us or the trustee of the certificate to the new holder or the issuance by us or the trustee of a new certificate to the new holder.

Global Debt Securities and Book-Entry System. Each global debt security will be deposited with, or on behalf of, the depositary, and registered in the name of the depositary or a nominee of the depositary. Beneficial interests in global debt securities will not be issuable in certificated form unless (i) the depositary has notified us that it is unwilling or unable to continue as depositary for such global debt security or has ceased to be qualified to act as such as required by the indenture and we fail to appoint a successor depositary within 90 days of such event, (ii) we determine, in our sole discretion, not to have such securities represented by one or more global securities or (iii) any other circumstances shall exist, in addition to or in lieu of those described above, as may be described in the applicable prospectus supplement. Unless and until a global debt security is exchanged for certificated debt securities under the limited circumstances described in the previous sentence, a global debt security may not be transferred except as a whole by the depositary to its nominee or by the nominee to the depositary, or by the depositary or its nominee to a successor depositary or to a nominee of the successor depositary.

Covenants

We will set forth in the applicable prospectus supplement any restrictive covenants applicable to any issue of debt securities.

No Protection In the Event of a Change of Control

Unless we state otherwise in the applicable prospectus supplement, the debt securities will not contain any provisions which may afford holders of the debt securities protection in the event we have a change in control or in the event of a highly leveraged transaction (whether or not such transaction results in a change in control) which could adversely affect holders of debt securities.

Consolidation, Merger and Sale of Assets

Symbotic may not consolidate with or merge with or into, or convey, transfer or lease all or substantially all of its assets to any person (a "successor person") unless:

13

Events of Default

"Event of Default" means with respect to any series of debt securities, any of the following:

No event of default with respect to a particular series of debt securities (except as to certain events of bankruptcy, insolvency or reorganization) necessarily constitutes an event of default with respect to any other series of debt securities. The occurrence of certain events of default or an acceleration under the indenture may constitute an event of default under certain indebtedness of ours or our subsidiaries outstanding from time to time.

If an event of default with respect to any series of debt securities at the time outstanding occurs and is continuing (other than an event of default resulting from certain events of bankruptcy, insolvency or reorganization), then the trustee or the holders of not less than 25% in principal amount of the outstanding debt securities of that series may, by a notice in writing to us (and to the trustee if given by the holders), declare to be due and payable immediately the principal of (or, if the debt securities of that series are discount securities, that portion of the principal amount as may be specified in the terms of that series) and accrued and unpaid interest, if any, on all debt securities of that series. In the case of an event of default resulting from certain events of bankruptcy, insolvency or reorganization, the principal amount (or such specified amount) of and accrued and unpaid interest, if any, on all outstanding debt securities will become and be immediately due and payable without any declaration or other act on the part of the trustee or any holder of outstanding debt securities. At any time after a declaration of acceleration with respect to debt securities of any series has been made, but before a judgment or decree for payment of the money due has been obtained by the trustee, the holders of a majority in principal amount of the outstanding debt securities of that series, by written notice to us and the trustee, may rescind and annul such declaration of acceleration and its consequences if all events of default, other than the non-payment of accelerated principal and interest, if any, with respect to debt securities of that series, have been cured or waived as provided in the indenture. We refer you to the prospectus supplement relating to any series of debt securities that are discount securities for the particular provisions relating to acceleration of a portion of the principal amount of such discount securities upon the occurrence of an event of default.

The indenture provides that the trustee will be under no obligation to perform any duty or exercise any of its rights or powers under the indenture unless the trustee receives indemnity satisfactory to it against any cost, liability or expense which might be incurred by it in performing such duty or exercising such right of power.

Subject to certain rights of the trustee, the holders of a majority in principal amount of the outstanding debt securities of any series will have the right to direct the time, method and place of conducting any proceeding for any remedy available to the trustee or exercising any trust or power conferred on the trustee with respect to the debt securities of that series.

14

No holder of any debt security of any series will have any right to institute any proceeding, judicial or otherwise, with respect to the indenture or for the appointment of a receiver or trustee, or for any remedy under the indenture, unless:

Notwithstanding any other provision in the indenture, the holder of any debt security will have an absolute and unconditional right to receive payment of the principal of, and any interest on, that debt security on or after the due dates expressed in that debt security (or, in the case of redemption, on the redemption date) and to institute suit for the enforcement of any such payment and such rights shall not be impaired without the consent of such holder.

The indenture requires us, within 120 days after the end of our fiscal year, to furnish to the trustee a statement as to compliance with the indenture from our principal executive officer, principal financial officer or principal accounting officer. If a default or event of default occurs and is continuing with respect to the debt securities of any series and if it is actually known to a responsible officer of the trustee, the trustee shall mail to each holder of the debt securities of that series notice of a default or event of default within 60 days after it occurs or, if later, after a responsible officer of the trustee has knowledge of such default or event of default. The indenture provides that the trustee may withhold notice to the holders of debt securities of any series of any default or event of default (except in payment on any debt securities of that series) with respect to debt securities of that series if the trustee determines in good faith that withholding notice is in the interest of the holders of those debt securities.

Modification and Waiver

We and the trustee may modify and amend or supplement the indenture or the debt securities of one or more series without the consent of any holder of any debt security:

15

We may also modify and amend the indenture with the consent of the holders of at least a majority in principal amount of the outstanding debt securities of each series affected by the modifications or amendments. We may not make any modification or amendment without the consent of the holders of each affected debt security then outstanding if that amendment will:

Except for certain specified provisions, the holders of at least a majority in principal amount of the outstanding debt securities of any series may, on behalf of the holders of all debt securities of that series, by written notice to the trustee, waive our compliance with provisions of the indenture or the debt securities with respect to such series. The holders of a majority in principal amount of the outstanding debt securities of any series may, on behalf of the holders of all the debt securities of such series, waive any past default under the indenture with respect to that series and its consequences, except a default in the payment of the principal of, or any interest on, any debt security of that series; provided, however, that the holders of a majority in principal amount of the outstanding debt securities of any series may rescind an acceleration and its consequences, including any related payment default that resulted from the acceleration.

16

Defeasance of Debt Securities and Certain Covenants in Certain Circumstances

Legal Defeasance. The indenture provides that, unless otherwise provided by the terms of the applicable series of debt securities, we may be discharged from any and all obligations in respect of the debt securities of any series (subject to certain exceptions). We will be so discharged upon the deposit with the trustee, in trust, of money and/or U.S. government obligations or, in the case of debt securities denominated in a single currency other than U.S. dollars, government obligations of the government that issued or caused to be issued such currency, that, through the payment of interest and principal in accordance with their terms, will provide money in an amount sufficient in the opinion of a nationally recognized firm of independent public accountants or investment bank to pay and discharge each installment of principal and interest, if any, on and any mandatory sinking fund payments in respect of the debt securities of that series on the stated maturity of those payments in accordance with the terms of the indenture and those debt securities.

This discharge may occur only if, among other things, we have delivered to the trustee an opinion of counsel stating that we have received from, or there has been published by, the United States Internal Revenue Service a ruling or, since the date of execution of the indenture, there has been a change in the applicable United States federal income tax law, in either case to the effect that, and based thereon such opinion shall confirm that, the holders of the debt securities of that series will not recognize income, gain or loss for United States federal income tax purposes as a result of the deposit, defeasance and discharge and will be subject to United States federal income tax on the same amounts and in the same manner and at the same times as would have been the case if the deposit, defeasance and discharge had not occurred.

Defeasance of Certain Covenants. The indenture provides that, unless otherwise provided by the terms of the applicable series of debt securities, upon compliance with certain conditions:

The conditions include:

Governing Law

The indenture and the debt securities, including any claim or controversy arising out of or relating to the indenture or the securities, will be governed by the laws of the State of New York (without regard to the conflicts of laws provisions thereof other than Sections 5-1401 of the General Obligations Law).

17

SELLING SECURITYHOLDERS

The Selling Securityholders listed in the table below may offer and sell any or all of the shares of Class A Common Stock set forth below pursuant to this prospectus. When we refer to the "Selling Securityholders" in this prospectus, we refer to the persons listed in the table below, and the pledgees, donees, transferees, assignees, successors and other permitted transferees that hold any of the Selling Securityholders' interest in the shares of Class A Common Stock after the date of this prospectus. The following table sets forth certain information provided by or on behalf of the Selling Securityholders regarding the beneficial ownership of the Selling Securityholders of our Class A Common Stock and the shares of Class A Common Stock being offered by the Selling Securityholders. The applicable percentage ownership of the securities being offered hereby is based on approximately 113,911,644 shares of Class A Common Stock, 74,296,208 shares of Class V-1 Common Stock, and 403,559,196 shares of Class V-3 Common Stock outstanding as of December 2, 2025. Information with respect to shares of Class A Common Stock owned beneficially after the offering assumes the sale of all of the shares of Class A Common Stock offered and no other purchases or sales of our securities.

We cannot advise you as to whether the Selling Securityholders will in fact sell any or all of such shares of Class A Common Stock.

18

PLAN OF DISTRIBUTION

We, or the Selling Securityholders, may sell the securities from time to time pursuant to underwritten public offerings, negotiated transactions, block trades or a combination of these methods or through underwriters or dealers, through agents and/or directly to one or more purchasers. The securities may be distributed from time to time in one or more transactions:

Each prospectus will indicate if the securities offered thereby will be listed on any securities exchange.

Offers to purchase the securities being offered by this prospectus may be solicited directly. Agents may also be designated to solicit offers to purchase the securities from time to time. Any agent involved in the offer or sale of our securities will be identified in a prospectus supplement.

If a dealer is utilized in the sale of the securities being offered by this prospectus, the securities will be sold to the dealer, as principal. The dealer may then resell the securities to the public at varying prices to be determined by the dealer at the time of resale.

If an underwriter is utilized in the sale of the securities being offered by this prospectus, an underwriting agreement will be executed with the underwriter at the time of sale and the name of any underwriter will be provided in the prospectus supplement that the underwriter will use to make resales of the securities to the public. In connection with the sale of the securities, we, the Selling Securityholders or the purchasers of securities for whom the underwriter may act as agent, may compensate the underwriter in the form of underwriting discounts or commissions. The underwriter may sell the securities to or through dealers, and those dealers may receive compensation in the form of discounts, concessions or commissions from the underwriters and/or commissions from the purchasers for which they may act as agent. Unless otherwise indicated in a prospectus supplement, an agent will be acting on a best efforts basis and a dealer will purchase securities as a principal, and may then resell the securities at varying prices to be determined by the dealer.

Any compensation paid to underwriters, dealers or agents in connection with the offering of the securities, and any discounts, concessions or commissions allowed by underwriters to participating dealers will be provided in the applicable prospectus supplement. Underwriters, dealers and agents participating in the distribution of the securities may be deemed to be underwriters within the meaning of the Securities Act, and any discounts and commissions received by them and any profit realized by them on resale of the securities may be deemed to be underwriting discounts and commissions. We, or the Selling Securityholders, may enter into agreements to indemnify underwriters, dealers and agents against civil liabilities, including liabilities under the Securities Act, or to contribute to payments they may be required to make in respect thereof and to reimburse those persons for certain expenses.

The securities may or may not be listed on a national securities exchange. To facilitate the offering of securities, certain persons participating in the offering may engage in transactions that stabilize, maintain or otherwise affect the price of the securities. This may include over-allotments or short sales of the securities, which involve the sale by persons participating in the offering of more securities than were sold to them. In these circumstances, these persons would cover such over-allotments or short positions by making purchases in the open market or by exercising their over-allotment option, if any. In addition, these persons may stabilize or maintain the price of the securities by bidding for or purchasing securities in the open market or by imposing penalty bids, whereby selling concessions allowed to dealers participating in the offering may be reclaimed if

19

securities sold by them are repurchased in connection with stabilization transactions. The effect of these transactions may be to stabilize or maintain the market price of the securities at a level above that which might otherwise prevail in the open market. These transactions may be discontinued at any time.

If indicated in the applicable prospectus supplement, underwriters or other persons acting as agents may be authorized to solicit offers by institutions or other suitable purchasers to purchase the securities at the public offering price set forth in the prospectus supplement, pursuant to delayed delivery contracts providing for payment and delivery on the date or dates stated in the prospectus supplement. These purchasers may include, among others, commercial and savings banks, insurance companies, pension funds, investment companies and educational and charitable institutions. Delayed delivery contracts will be subject to the condition that the purchase of the securities covered by the delayed delivery contracts will not at the time of delivery be prohibited under the laws of any jurisdiction in the United States to which the purchaser is subject. The underwriters and agents will not have any responsibility with respect to the validity or performance of these contracts.

We, or the Selling Securityholders, may engage in at-the-market offerings into an existing trading market in accordance with rule 415(a)(4) under the Securities Act. In addition, we, or the Selling Securityholders, may enter into derivative transactions with third parties, or sell securities not covered by this prospectus to third parties in privately negotiated transactions. If the applicable prospectus supplement so indicates, in connection with those derivatives, the third parties may sell securities covered by this prospectus and the applicable prospectus supplement, including in short sale transactions. If so, the third party may use securities pledged by us or borrowed from us, the Selling Securityholders or others to settle those sales or to close out any related open borrowings of common stock, and may use securities received from us or the Selling Securityholders in settlement of those derivatives to close out any related open borrowings of our common stock. In addition, we, or the Selling Securityholders, may loan or pledge securities to a financial institution or other third party that in turn may sell the securities using this prospectus and an applicable prospectus supplement. Such financial institution or other third party may transfer its economic short position to investors in our securities or in connection with a concurrent offering of other securities.

The underwriters, dealers and agents may engage in transactions with us, or perform services for us, in the ordinary course of business for which they receive compensation.

In connection with one or more offerings of the securities registered hereunder, we may enter into lock-up agreements with certain of our directors, officers and/or stockholders. Specific terms of the lock-up restrictions will be provided in the applicable prospectus supplements.

20

MATERIAL U.S. FEDERAL INCOME TAX CONSEQUENCES

The following summary is a discussion of U.S. federal income tax considerations of the ownership and disposition of Class A Common Stock by a Non-U.S. holder. As used herein, the term "Non-U.S. holder" means a beneficial owner of Class A Common Stock who or that is for U.S. federal income tax purposes:

but generally does not include an individual who is present in the U.S. for 183 days or more in the relevant calendar year. If you are such an individual, you should consult your tax advisor regarding the U.S. federal income tax consequences of the acquisition, ownership and sale or other disposition of our Class A Common Stock.

This section applies only to Non-U.S. holders who hold shares of Class A Common Stock as capital assets for U.S. federal income tax purposes (generally, property held for investment) and that are purchased from us or the Selling Securityholders.

This section is general in nature and does not discuss all aspects of U.S. federal income taxation that might be relevant to a particular holder in light of such holder's circumstances or status, nor does it address tax considerations applicable to a holder subject to special rules, including:

This discussion is based on the Code, and administrative pronouncements, judicial decisions and final, temporary and proposed Treasury Regulations all as of the date hereof, changes to any of which subsequent to the date of this prospectus may affect the tax consequences described herein (possibly with retroactive effect).

This discussion does not address any aspect of state, local or non-U.S. taxation, or any U.S. federal taxes other than income taxes (such as estate or gift tax consequences, the alternative minimum taxes or the Medicare tax on investment income). Each of the foregoing is subject to change, possibly with retroactive effect. You should consult your tax advisors with respect to the application of U.S. federal tax laws to your particular situation, as well as any tax consequences arising under the laws of any state, local or non-U.S. jurisdiction.

21

If a partnership (or any entity or arrangement so characterized for U.S. federal income tax purposes) holds Class A Common Stock, the tax treatment of such partnership and a person treated as a partner of such partnership will generally depend on the status of the partner and the activities of the partnership. Partnerships holding any Class A Common Stock and persons that are treated as partners of such partnerships should consult their tax advisors as to the particular U.S. federal income tax consequences to them of the ownership and disposition of Class A Common Stock.

THE FOLLOWING IS FOR INFORMATIONAL PURPOSES ONLY. ALL STOCKHOLDERS SHOULD CONSULT THEIR TAX ADVISORS REGARDING THE TAX CONSEQUENCES OF THE OWNERSHIP AND DISPOSITION OF CLASS A COMMON STOCK, INCLUDING THE EFFECTS OF U.S. FEDERAL, STATE AND LOCAL AND NON-U.S. TAX LAWS.

Distributions

In general, any distributions we make to a Non-U.S. holder of shares of Class A Common Stock, to the extent paid out of our current or accumulated earnings and profits (as determined under U.S. federal income tax principles), will constitute dividends for U.S. federal income tax purposes. Provided such dividends are not effectively connected with the Non-U.S. holder's conduct of a trade or business within the United States (and are not attributable to a U.S. permanent establishment under an applicable treaty), we or the applicable withholding agent will be required to withhold tax from the gross amount of the dividend at a rate of 30%, unless such Non-U.S. holder is eligible for a reduced rate of withholding tax under an applicable income tax treaty and provides proper certification of its eligibility for such reduced rate (usually on an IRS Form W-8BEN or W-8BEN-E). If a Non-U.S. holder is eligible for a reduced rate of U.S. withholding tax under a tax treaty, the Non-U.S. holder may obtain a refund of any amounts withheld in excess of that rate by filing a refund claim with the IRS. Any distribution not constituting a dividend will be treated first as reducing (but not below zero) the Non-U.S. holder's adjusted tax basis in its shares of Class A Common Stock and, to the extent such distribution exceeds the Non-U.S. holder's adjusted tax basis, as gain realized from the sale or other disposition of the Class A Common Stock, which will be treated as described under "-Taxable Disposition of Class A Common Stock" below. In addition, if we or the applicable withholding agent determine that we are likely to be classified as a "U.S. real property holding corporation" (see "-Taxable Disposition of Class A Common Stock" below), we or the applicable withholding agent may withhold 15% of the portion of any distribution that that is not treated as a dividend for U.S. federal income tax purposes.

Dividends that we pay to a Non-U.S. holder that are effectively connected with such Non-U.S. holder's conduct of a trade or business within the United States (and if a tax treaty applies, are attributable to a U.S. permanent establishment or fixed base maintained by the Non-U.S. holder) will generally not be subject to U.S. withholding tax, provided such Non-U.S. holder complies with certain certification and disclosure requirements (usually by providing an IRS Form W-8ECI). Instead, the effectively connected dividends will be subject to regular U.S. income tax as if the Non-U.S. holder were a U.S. person, subject to an applicable income tax treaty providing otherwise. A Non-U.S. corporation receiving effectively connected dividends may also be subject to an additional "branch profits tax" imposed at a rate of 30% (or a lower treaty rate).

Taxable Disposition of Class A Common Stock

A Non-U.S. holder generally will not be subject to U.S. federal income or withholding tax in respect of gain realized on a sale, taxable exchange or other taxable disposition of Class A Common Stock, unless:

22

Unless an applicable treaty provides otherwise, gain described in the first bullet point above will be subject to tax at generally applicable U.S. federal income tax rates as if the Non-U.S. holder were a U.S. person. Any gains described in the first bullet point above of a Non-U.S. holder that is a foreign corporation may also be subject to an additional "branch profits tax" at a 30% rate (or lower treaty rate).

If the second bullet point above applies to a Non-U.S. holder, gain recognized by such holder on the sale, exchange or other disposition of Class A Common Stock will be subject to tax at generally applicable U.S. federal income tax rates. In addition, if Class A Common Stock will not be treated as regularly traded on an established securities market, then a buyer of Class A Common Stock from such holder may be required to withhold U.S. federal income tax at a rate of 15% of the amount realized upon such disposition. We will be classified as a United States real property holding corporation if the fair market value of our "United States real property interests" equals or exceeds 50% of the sum of the fair market value of our worldwide real property interests plus our other assets used or held for use in a trade or business, as determined for U.S. federal income tax purposes. Although there can be no assurance, we do not believe that we are, or have been, a United States real property holding corporation. We can provide no assurance as to our future status as a United States real property holding corporation.

Information Reporting and Backup Withholding

Information returns may be filed with the IRS in connection with payments of dividends and the proceeds from a sale or other disposition of Class A Common Stock. A Non-U.S. holder may have to comply with certification procedures to establish that it is not a United States person in order to avoid information reporting and backup withholding requirements. The certification procedures required to claim a reduced rate of withholding under a treaty will satisfy the certification requirements necessary to avoid the backup withholding as well. The amount of any backup withholding from a payment to a Non-U.S. holder will be allowed as a credit against such holder's U.S. federal income tax liability and may entitle such holder to a refund, provided that the required information is timely furnished to the IRS.

FATCA Withholding Taxes

Provisions commonly referred to as "FATCA" impose withholding of 30% on payments of dividends on Class A Common Stock to "foreign financial institutions" (which is broadly defined for this purpose and in general includes investment vehicles) and certain other non-U.S. entities unless various U.S. information reporting and due diligence requirements (generally relating to ownership by U.S. persons of interests in or accounts with those entities) have been satisfied by, or an exemption applies to, the payee (typically certified as to by the delivery of a properly completed IRS Form W-8BEN-E). The IRS has issued proposed regulations (on which taxpayers may rely until final regulations are issued) that provide that these withholding requirements would generally not apply to gross proceeds from sales or other dispositions of property that would give rise to U.S. source dividend income, such as Class A Common Stock. Foreign financial institutions located in jurisdictions that have an intergovernmental agreement with the United States governing FATCA may be subject to different rules. Under certain circumstances, a holder might be eligible for refunds or credits of such withholding taxes, and a Non-U.S. holder might be required to file a U.S. federal income tax return to claim such refunds or credits. Prospective investors should consult their tax advisors regarding the effects of FATCA on their investment in our securities.

ALL NON-U.S. HOLDERS ARE URGED TO CONSULT THEIR TAX ADVISORS REGARDING THE

U.S. FEDERAL, STATE, LOCAL AND FOREIGN TAX CONSEQUENCES OF INVESTING IN OUR

SECURITIES TO THEM.

23

EXPERTS

The audited financial statements incorporated by reference in this prospectus and elsewhere in the registration statement have been so incorporated by reference in reliance upon the report of Grant Thornton LLP, independent registered public accountants, upon the authority of said firm as experts in accounting and auditing.

VALIDITY OF SECURITIES

The validity of the securities offered by this prospectus will be passed upon by Sullivan & Cromwell LLP.

24

WHERE YOU CAN FIND MORE INFORMATION

We have filed with the SEC a registration statement on Form S-3 with respect to the securities offered by this prospectus. This prospectus is a part of that registration statement. This prospectus does not contain all of the information included in the registration statement. For further information pertaining to us and our securities, you should refer to the registration statement and to its exhibits. Statements contained in or incorporated by reference into this prospectus concerning the contents of any contract or any other document are not necessarily complete. If a contract or document has been filed as an exhibit to the registration statement or one of our filings with the SEC that is incorporated by reference into the registration statement, we refer you to the copy of the contract or document that has been filed. Each statement contained in or incorporated by reference into this prospectus relating to a contract or document filed as an exhibit is qualified in all respects by the filed exhibit.

We are subject to the information reporting requirements of the Exchange Act, and we file annual, quarterly and current reports, proxy statements and other information with the SEC. Our SEC filings are available to the public over the internet at the SEC's website at www.sec.gov and on our website at www.symbotic.com. The information found on, or that can be accessed from or that is hyperlinked to, our website is not part of this prospectus. You may inspect a copy of the registration statement through the SEC's website, as provided herein.

25

INFORMATION WE INCORPORATE BY REFERENCE

The SEC allows us to "incorporate by reference" into this prospectus the information in documents we file with it, which means that we can disclose important information to you by referring you to those documents. The information incorporated by reference is considered to be a part of this prospectus, and information that we file later with the SEC will automatically update and supersede this information. Any statement contained in any document incorporated or deemed to be incorporated by reference herein shall be deemed to be modified or superseded for purposes of this prospectus to the extent that a statement contained in or omitted from this prospectus or any accompanying prospectus supplement or free writing prospectus, or in any other subsequently filed document that also is or is deemed to be incorporated by reference herein, modifies or supersedes such statement. Any such statement so modified or superseded shall not be deemed, except as so modified or superseded, to constitute a part of this prospectus.

We incorporate by reference the documents listed below and any future documents that we file with the SEC (excluding any portion of such documents that are furnished and not filed with the SEC) under Sections 13(a), 13(c), 14 or 15(d) of the Exchange Act (1) after the date of the initial filing of the registration statement of which this prospectus forms a part prior to the effectiveness of the registration statement and (2) after the date of this prospectus until the offering of the securities registered hereunder is terminated:

We will not, however, incorporate by reference in this prospectus any documents or portions thereof that are not deemed "filed" with the SEC, including any information furnished pursuant to Item 2.02 or Item 7.01 of our current reports on Form 8-K unless, and except to the extent, specified in such current reports.

We will provide you with a copy of any of these filings (other than an exhibit to these filings, unless the exhibit is specifically incorporated by reference into the filing requested) and any other information incorporated by reference hereto at no cost, if you submit a request to us by writing or telephoning us at the following address and telephone number:

Symbotic Inc.

200 Research Drive

Wilmington, MA 01887

Telephone: (978) 284-2800

Attention: Corporate Secretary

26

10,000,000 Shares

Class A Common Stock

PROSPECTUS SUPPLEMENT

Joint Book-Running Managers

December 3, 2025