Initial Registration Statement for Employee Benefit Plan (Form S-8)

As filed with the Securities and Exchange Commission on March 5, 2026

Registration No. 333-

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM S-8

REGISTRATION STATEMENT

UNDER

THE SECURITIES ACT OF 1933

ArriVent BioPharma, Inc.

(Exact name of registrant as specified in its charter)

Delaware		86-3336099
(State or other jurisdiction of incorporation or organization)		(I.R.S. Employer Identification Number)

18 Campus Boulevard, Suite 100

Newtown Square, PA

(Address, including zip code, of registrant's principal executive offices)

ArriVent BioPharma, Inc. 2024 Employee, Director and Consultant Equity Incentive Plan

(Full title of the plan)

Zhengbin (Bing) Yao, Ph.D.

President and Chief Executive Officer

ArriVent BioPharma, Inc.

18 Campus Boulevard, Suite 100

Newtown Square, PA 19073

Telephone: (628) 277-4836

(Name, address and telephone number, including area code, of agent for service)

Copies to:

John T. Rudy

Matthew T. Simpson

Nishant M. Dharia

Mintz, Levin, Cohn, Ferris, Glovsky and Popeo, P.C.

One Financial Center

Boston, MA 02111

(617) 542-6000

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, a smaller reporting company or an emerging growth company. See the definitions of "large accelerated filer," "accelerated filer," "smaller reporting company," and "emerging growth company" in Rule 12b-2 of the Exchange Act.

Large accelerated filer	¨		Accelerated filer	¨
Non-accelerated filer	x		Smaller reporting company	x
			Emerging growth company	x

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 7(a)(2)(B) of the Securities Act. ¨

EXPLANATORY NOTE

This Registration Statement registers an aggregate of 2,122,612 additional shares (the "Shares") of common stock, par value $0.0001 per share, of ArriVent BioPharma, Inc. (the "Registrant"), reserved under the ArriVent BioPharma, Inc. 2024 Employee, Director and Consultant Equity Incentive Plan (the "2024 Plan"), representing an increase of 2,122,612 shares reserved under the 2024 Plan effective January 1, 2026 by operation of the 2024 Plan's "evergreen" provision. This registration statement registers additional securities of the same class as other securities for which registration statements filed on Form S-8 (File Nos. 333-276840 and 333-285480) relating to an employee benefit plan are effective. The information contained in the Registrant's registration statements on Form S-8 filed with the Securities and Exchange Commission on February 2, 2024 (File No. 333-276840) and March 3, 2025 (File No. 333-285480) is hereby incorporated by reference pursuant to General Instruction E of Form S-8.

PART II

INFORMATION REQUIRED IN THE REGISTRATION STATEMENT

Item 8. Exhibits.

Exhibit Number		Description		Schedule Form		File Number		Exhibit		Filing Date
4.1		Amended and Restated Certificate of Incorporation.		8-K		001-41929		3.1		January 30, 2024
4.2		Amended and Restated Bylaws.		8-K		001-41929		3.2		January 30, 2024
4.3		Specimen Common Stock Certificate.		S-1		333-276397		4.1		January 5, 2024
4.4		Amended and Restated Investors' Rights Agreement, dated as of December 16, 2022.		S-1		333-276397		4.2		January 5, 2024
5.1*		Opinion of Mintz, Levin, Cohn, Ferris, Glovsky and Popeo, P.C.
23.1*		Consent of Mintz, Levin, Cohn, Ferris, Glovsky and Popeo, P.C. (included in Exhibit 5.1).
23.2*		Consent of PricewaterhouseCoopers LLP.
23.3*		Consent of KPMG LLP.
24.1*		Power of Attorney (included on the signature page of this Registration Statement).
99.1+		2024 Employee, Director and Consultant Equity Incentive Plan, form of stock option agreement and form of restricted stock agreement thereunder.		S-1/A		333-276397		10.3		January 22, 2024
107*		Filing Fee Table.
*		Filed herewith.
+		Denotes management compensation plan or contract.

SIGNATURES

Pursuant to the requirements of the Securities Act of 1933, as amended, the Registrant certifies that it has reasonable grounds to believe that it meets all of the requirements for filing on Form S-8 and has duly caused this registration statement to be signed on its behalf by the undersigned, thereunto duly authorized, in Newtown Square, Pennsylvania, on this 5^th day of March, 2026.

	ARRIVENT BIOPHARMA, INC.
	By:	/s/ Zhengbin (Bing) Yao, Ph.D.
		Zhengbin (Bing) Yao, Ph.D.
		Chairman, President and Chief Executive Officer

POWER OF ATTORNEY

Each person whose signature appears below constitutes and appoints each of Zhengbin (Bing) Yao, Ph.D. and Winston Kung, MBA, acting alone or together with another attorney-in-fact, as his or her true and lawful attorney-in-fact and agent, with full power of substitution and resubstitution, for such person and in his or her name, place and stead, in any and all capacities, to sign any or all further amendments (including post-effective amendments) to this registration statement, and to file the same, with all exhibits thereto, and other documents in connection therewith, with the Securities and Exchange Commission, granting unto said attorneys-in-fact and agents, and each of them, full power and authority to do and perform each and every act and thing requisite and necessary to be done in and about the premises, as fully to all intents and purposes as he or she might or could do in person, hereby ratifying and confirming all that said attorney-in-fact and agent, or his or her substitute or substitutes, may lawfully do or cause to be done by virtue hereof.

Pursuant to the requirements of the Securities Act of 1933, as amended, this registration statement has been signed by the following persons in the capacities and on the date indicated.

Signature		Title		Date
/s/ Zhengbin (Bing) Yao, Ph.D.
Zhengbin (Bing) Yao, Ph.D.		Chairman, President and Chief Executive Officer (Principal Executive Officer)		March 5, 2026
/s/ Winston Kung, MBA
Winston Kung, MBA		Chief Financial Officer and Treasurer (Principal Financial Officer and Principal Accounting Officer)		March 5, 2026
/s/ James Healy, M.D., Ph.D.	Director			March 5, 2026
James Healy, M.D., Ph.D.
/s/ John Hohneker, M.D.		Director		March 5, 2026
John Hohneker, M.D.
/s/ Stuart Lutzker, M.D., Ph.D.		President of Research and Development and Director		March 5, 2026
Stuart Lutzker, M.D., Ph.D.
/s/ Chris W. Nolet		Director		March 5, 2026
Chris W. Nolet
/s/ Kristine Peterson		Director		March 5, 2026
Kristine Peterson
/s/ Merdad Parsey, M.D., Ph.D.		Director		March 5, 2026
Merdad Parsey, M.D., Ph.D.