Statement of Changes in Beneficial Ownership (Form 4)

FORM 4 Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b). Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP OF SECURITIES Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934 or Section 30(h) of the Investment Company Act of 1940

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1. Name and Address of Reporting Person * ACKMAN WILLIAM A 2. Issuer Name and Ticker or Trading Symbol Pershing Square SPARC Holdings, Ltd./DE [N/A] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) __X__ Director __X__ 10% Owner __X__ Officer (give title below) _____ Other (specify below) Chief Executive Officer (Last) (First) (Middle) 787 ELEVENTH AVENUE, 9TH FLOOR 3. Date of Earliest Transaction (Month/Day/Year) 04/21/2026 (Street) NEW YORK, NY 10019 4. If Amendment, Date Original Filed (Month/Day/Year) 6. Individual or Joint/Group Filing (Check Applicable Line) ___ Form filed by One Reporting Person _X_ Form filed by More than One Reporting Person (City) (State) (Zip) Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned

1.Title of Security (Instr. 3) 2. Transaction Date (Month/Day/Year) 2A. Deemed Execution Date, if any (Month/Day/Year) 3. Transaction Code (Instr. 8) 4. Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5) 5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4) 6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 7. Nature of Indirect Beneficial Ownership (Instr. 4) Code V Amount (A) or (D) Price Common Stock 04/21/2026 J 0 (1)(2) D (1) 422,533(1)(2) I See footnotes(3)(4)(5)

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Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned
(e.g., puts, calls, warrants, options, convertible securities)

1. Title of Derivative Security (Instr. 3)

2. Conversion or Exercise Price of Derivative Security

3. Transaction Date (Month/Day/Year)

3A. Deemed Execution Date, if any (Month/Day/Year)

4. Transaction Code (Instr. 8)

5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4, and 5)

6. Date Exercisable and Expiration Date (Month/Day/Year)

7. Title and Amount of Underlying Securities (Instr. 3 and 4)

8. Price of Derivative Security (Instr. 5)

9. Number of Derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)

10. Ownership Form of Derivative Security: Direct (D) or Indirect (I) (Instr. 4)

11. Nature of Indirect Beneficial Ownership (Instr. 4)

Code

V

(A)

(D)

Date Exercisable

Expiration Date

Title

Amount or Number of Shares

Forward Purchase Shares

(6)(7)

(6)(7)

(6)(7)

See footnote 6(6)(7)

250,000

250,000(6)(7)

I

See footnotes(3)(4)(5)

Forward Purchase Shares (Right to buy)

(8)(9)

(8)(9)

(8)(9)

See footnote 8(8)(9)

3,250,000

3,250,000(8)(9)

I

See footnotes(3)(4)(5)

Sponsor Warrants

(10)(11)

04/21/2026

J

0 (1)(10)

(10)(11)

(10)(11)

See footnote 10(10)(11)

(10)(11)

(1)(10)

$35,892,480(10)(11)

I

See footnotes(3)(4)(5)

Reporting Owners

Reporting Owner Name / Address	Relationships
	Director	10% Owner	Officer	Other
ACKMAN WILLIAM A 787 ELEVENTH AVENUE 9TH FLOOR NEW YORK, NY 10019	X	X	Chief Executive Officer
Pershing Square Capital Management, L.P. 787 ELEVENTH AVENUE 9TH FLOOR NEW YORK, NY 10019		X
PSCM GP, LLC 787 ELEVENTH AVENUE 9TH FLOOR NEW YORK, NY 10019		X

Signatures

/s/ William A. Ackman		04/23/2026
**Signature of Reporting Person		Date
PERSHING SQUARE CAPITAL MANAGEMENT, L.P., By: /s/ William A. Ackman, Authorized Signatory		04/23/2026
**Signature of Reporting Person		Date
PSCM GP, LLC, By: /s/ William A. Ackman, Authorized Signatory		04/23/2026
**Signature of Reporting Person		Date

Explanation of Responses:

*	If the form is filed by more than one reporting person, see Instruction 4(b)(v).
**	Intentional misstatements or omissions of facts constitute Federal Criminal Violations. See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
(1)	On April 21, 2026, approximately 1.8% of the membership interest in the Sponsor (as defined below) were transferred from PSLP (as defined below) to PS Redemption, L.P. ("RedemptionCo"), which was formed for the purpose of giving effect to the redemption of certain limited partner interests of PSLP in connection with a special redemption opportunity that was consummated on April 21, 2026. The membership interest transferred to RedemptionCo represents a proportionate number of shares of the Issuer's common stock, par value $0.0001 per share ("Common Stock") and Sponsor Warrants (as defined below) held by the Sponsor. The transfer of the membership interest did not result in a change of aggregate ownership of the Issuer's common stock and Sponsor Warrants by the Sponsor.
(2)	(Continued from Footnote 1) The 422,533 shares of the Issuer's Common Stock were issued to the Sponsor prior to the Issuer's initial public distribution. The aggregate voting power of the 422,533 shares of Common Stock is equal to 100% of the total voting power of the Issuer's Common Stock outstanding immediately following the initial public distribution.
(3)	In addition to William A. Ackman, a citizen of the United States of America, this Form 4 is being filed jointly by Pershing Square Capital Management, L.P., a Delaware limited partnership ("Pershing Square"), and PSCM GP, LLC, a Delaware limited liability company ("PS Management" and collectively, the "Reporting Persons"), each of whom has the same business address as Pershing Square and may be deemed to have a pecuniary interest in securities reported on this Form 4 (the "Subject Securities").
(4)	Pershing Square advises the accounts of Pershing Square, L.P., a Delaware limited partnership ("PSLP"), Pershing Square International, Ltd., a Cayman Islands exempted company ("PS International"), and Pershing Square Holdings, Ltd., a limited liability company incorporated in Guernsey ("PSH" and together with PSLP and PS International, the "Pershing Square Funds") and RedemptionCo. The Pershing Square Funds and RedemptionCo are the members of Pershing Square SPARC Sponsor, LLC, a Delaware limited liability company ("Sponsor"). Pershing Square is the non-member manager of the Sponsor. Pershing Square also advises PS SPARC I Master, L.P. ("SPARC Master LP").
(5)	Pershing Square, as the investment adviser to the Pershing Square Funds and RedemptionCo, may be deemed to be the beneficial owner of the Subject Securities for purposes of Rule 16a-1(a) under the Securities Exchange Act of 1934. As the general partner of Pershing Square, PS Management may be deemed to be the beneficial owner of the Subject Securities for purposes of Rule 16a-1(a). By virtue of William A. Ackman's position as Chief Executive Officer of Pershing Square and as the managing member of PS Management, William A. Ackman may be deemed to be the beneficial owner of the Subject Securities for purposes of Rule 16a-1(a). Each of the Reporting Persons disclaims any beneficial ownership of any of the Subject Securities, except to the extent of any pecuniary interest therein.
(6)	Reflects securities acquirable by the Pershing Square Funds in connection with that certain committed forward purchase agreement ("Committed Forward Purchase Agreement"), dated September 29, 2023, between the Issuer and the Pershing Square Funds. Pursuant to the Committed Forward Purchase Agreement, the Pershing Square Funds are obligated to purchase, in one or more private placements to occur simultaneously with the closing of the Issuer's business combination, at least $250,000,000 and up to $1,000,000,000 of common shares of the surviving entity of the Issuer's business combination based upon the final exercise price (the "Final Exercise Price") of the Issuer's subscription warrants, referred to as SPARs, which will be publicly announced in connection with the business combination and which will be at least $10.00.
(7)	(Continued from Footnote 6) For purposes of this Form 4, the Reporting Persons have assumed a Final Exercise Price equal to $10.00 and therefore the Pershing Square Funds will be obligated to purchase 250,000 forward purchase shares ("Forward Purchase Shares") of the Issuer, at a price of $10.00 per Forward Purchase Share. The obligation of the Pershing Square Funds to purchase the Forward Purchase Shares may be allocated among the Pershing Square Funds from time to time. The Forward Purchase Shares will generally not be transferable, assignable or salable until 180 days after the consummation of the Issuer's business combination.
(8)	Reflects securities acquirable by SPARC Master LP in connection with that certain additional forward purchase agreement ("Additional Forward Purchase Agreement"), dated September 29, 2023, between the Issuer and SPARC Master LP. Pursuant to the Additional Forward Purchase Agreement, SPARC Master LP has the right, but not the obligation, to purchase, in one or two tranches, a number of common shares of the surviving entity of the Issuer's business combination up to an amount equal to $3,500,000,000 less the amount obligated to be purchased by the Pershing Square Funds pursuant to the Committed Forward Purchase Agreement.
(9)	(Continued from Footnote 8) For purposes of this Form 4, the Reporting Persons have assumed a Final Exercise Price equal to $10.00 and therefore the SPARC Master LP will have the right, but not the obligation, to purchase up to 3,250,000 additional forward purchase shares ("Additional Forward Purchase Shares") of the Issuer, at a price of $10.00 per Additional Forward Purchase Share. SPARC Master LP's right to purchase the Additional Forward Purchase Shares may be transferred, in whole or in part, to any entity that is managed by Pershing Square, but not to third parties. The Additional Forward Purchase Shares will generally not be transferable, assignable or salable until 180 days after the consummation of the Issuer's business combination.
(10)	Prior to the Issuer's initial public distribution, Sponsor purchased, in a private placement, an aggregate of $35,892,480 of sponsor warrants ("Sponsor Warrants"), which will be exercisable, in the aggregate, for an amount of shares up to 4.95% of the outstanding shares (on a fully diluted basis) of the post-combination company, at a per share exercise price equal to 120% of the Final Exercise Price. The actual percentage of shares on a fully diluted basis into which the Sponsor Warrants are exercisable will be depend on and be decreased ratably in the event that (1) the aggregate funds raised at the closing of the business combination from the exercise of the SPARs and the amount purchased by SPARC Master LP pursuant to the Additional Forward Purchase Agreement, if any, is less than (2) the amount of funds that would have been raised if 100% of the issued SPARs had been exercised at the closing of the business combination.
(11)	(Continued from Footnote 10) The Sponsor Warrants will generally not be transferable, assignable or salable until three years after the consummation of the Issuer's business combination, and expire 10 years after the date of the Issuer's business combination.

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