SEC Form 3

FORM 3

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 INITIAL STATEMENT OF 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* ORBIMED ADVISORS LLC (Last) (First) (Middle) 601 LEXINGTON AVENUE, 54TH FLOOR (Street) NEW YORK NY 10022 (City) (State) (Zip)	2. Date of Event Requiring Statement (Month/Day/Year) 01/25/2024	3. Issuer Name and Ticker or Trading Symbol ArriVent Biopharma, Inc. [ AVBP ]
		4. Relationship of Reporting Person(s) to Issuer (Check all applicable) X Director X 10% Owner Officer (give title below) Other (specify below)	5. If Amendment, Date of 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

Table I - Non-Derivative Securities Beneficially Owned
1. Title of Security (Instr. 4)	2. Amount of Securities Beneficially Owned (Instr. 4)	3. Ownership Form: Direct (D) or Indirect (I) (Instr. 5)	4. Nature of Indirect Beneficial Ownership (Instr. 5)

Table II - Derivative Securities Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 4)	2. Date Exercisable and Expiration Date (Month/Day/Year)		3. Title and Amount of Securities Underlying Derivative Security (Instr. 4)		4. Conversion or Exercise Price of Derivative Security	5. Ownership Form: Direct (D) or Indirect (I) (Instr. 5)	6. Nature of Indirect Beneficial Ownership (Instr. 5)
	Date Exercisable	Expiration Date	Title	Amount or Number of Shares
Series A Preferred Stock	(1)	(1)	Common Stock	821,827(2)	(2)	I	See footnotes(3)(5)
Series A Preferred Stock	(1)	(1)	Common Stock	821,827(2)	(2)	I	See footnotes(4)(5)
Series B Preferred Stock	(1)	(1)	Common Stock	469,615(2)	(2)	I	See footnotes(3)(5)
Series B Preferred Stock	(1)	(1)	Common Stock	469,615(2)	(2)	I	See footnotes(4)(5)

1. Name and Address of Reporting Person* ORBIMED ADVISORS LLC (Last) (First) (Middle) 601 LEXINGTON AVENUE, 54TH FLOOR (Street) NEW YORK NY 10022 (City) (State) (Zip) Relationship of Reporting Person(s) to Issuer X Director X 10% Owner Officer (give title below) Other (specify below)

1. Name and Address of Reporting Person* OrbiMed Capital GP VIII LLC (Last) (First) (Middle) 601 LEXINGTON AVENUE, 54TH FLOOR (Street) NEW YORK NY 10022 (City) (State) (Zip) Relationship of Reporting Person(s) to Issuer X Director X 10% Owner Officer (give title below) Other (specify below)

1. Name and Address of Reporting Person* OrbiMed Advisors IV Ltd (Last) (First) (Middle) 601 LEXINGTON AVENUE, 54TH FLOOR (Street) NEW YORK NY 10022 (City) (State) (Zip) Relationship of Reporting Person(s) to Issuer X Director X 10% Owner Officer (give title below) Other (specify below)

1. Name and Address of Reporting Person* OrbiMed Asia GP IV, L.P. (Last) (First) (Middle) 601 LEXINGTON AVENUE, 54TH FLOOR (Street) NEW YORK, NY 10022 (City) (State) (Zip) Relationship of Reporting Person(s) to Issuer X Director X 10% Owner Officer (give title below) Other (specify below)

Explanation of Responses:

1. The shares of preferred stock will automatically convert into the Issuer's common stock in accordance with the Issuer's Amended and Restated Certificate of Incorporation immediately prior to the completion of the Issuer's initial public offering.

2. The shares of preferred stock will convert into common stock immediately prior to the closing of the Issuer's initial public offering using a calculation defined in the Issuer's Amended and Restated Certificate of Incorporation, as amended, based on the initial purchase price and the conversion rate in effect at the time of conversion. The shares of preferred stock will convert on a 15.21-for-1 basis and such conversion rate is reflected in the amount of common stock underlying the security.

3. These securities are held of record by OrbiMed Asia Partners IV, L.P. ("OAP IV"). OrbiMed Asia GP IV, L.P. ("Asia GP IV") is the general partner of OAP IV and OrbiMed Advisors IV Limited ("Advisors IV") is the general partner of Asia GP IV. OrbiMed Advisors LLC ("OrbiMed Advisors") is the advisory company of OAP IV. By virtue of such relationships, Asia GP IV, Advisors IV, and OrbiMed Advisors may be deemed to have voting power and investment power over the securities held by OAP IV and as a result, may be deemed to have beneficial ownership over such securities. OrbiMed Advisors exercises voting and investment power through a management committee comprised of Carl L. Gordon, Sven H. Borho, and W. Carter Neild, each of whom disclaims beneficial ownership of the shares held by OAP IV.

4. These securities are held of record by OrbiMed Private Investments VIII, L.P. ("OPI VIII"). OrbiMed Capital GP VIII LLC ("GP VIII") is the general partner of OPI VIII and OrbiMed Advisors is the managing member of GP VIII. By virtue of such relationships, GP VIII and OrbiMed Advisors may be deemed to have voting power and investment power over the securities held by OPI VIII and as a result, may be deemed to have beneficial ownership over such securities. OrbiMed Advisors exercises voting and investment power through a management committee comprised of Carl L. Gordon, Sven H. Borho, and W. Carter Neild, each of whom disclaims beneficial ownership of the shares held by OPI VIII.

5. This report on Form 3 is jointly filed by OrbiMed Advisors, GP VIII, Advisors IV, and Asia GP IV. Each of the Reporting Persons disclaims beneficial ownership of the securities reported herein for purposes of Rule 16a-1(a) under the Securities Exchange Act of 1934, as amended (the "Exchange Act"), except to the extent of its pecuniary interest therein, if any. The Reporting Persons have designated a representative, Carl L. Gordon, a member of OrbiMed Advisors, to serve on the Issuer's board of directors. This report shall not be deemed an admission that any such entity or person is a beneficial owner of such securities for purpose of Section 16 of the Exchange Act, or for any other purpose.

	OrbiMed Advisors LLC By: /s/ Douglas Coon, Chief Compliance Officer	01/25/2024
	OrbiMed Capital GP VIII LLC By: /s/ Douglas Coon, Chief Compliance Officer	01/25/2024
	OrbiMed Advisors IV Limited By: /s/ Douglas Coon, Chief Compliance Officer	01/25/2024
	OrbiMed Asia GP IV, L.P. By: /s/ Douglas Coon, Chief Compliance Officer	01/25/2024
	** Signature of Reporting Person	Date
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