[Form 4] Arcus Biosciences, Inc. Insider Trading Activity

Rhea-AI Filing Summary

Arcus Biosciences, Inc. reported that its general counsel sold company stock in mid-December 2025 in transactions related to restricted stock unit (RSU) vesting. On December 16, 2025, 7,658 shares of common stock were sold at a weighted average price of $21.8843, leaving 131,544 shares beneficially owned afterward. On December 17, 2025, a further 6,810 shares were sold at a weighted average price of $22.1595, resulting in 124,734 shares beneficially owned. The filing explains that these sales were made by the issuer on the reporting person’s behalf to cover tax withholding obligations triggered by RSU vesting under an equity administration policy implemented on May 22, 2025, and are described as non‑discretionary trades. The remaining holdings include one share acquired through the company’s employee stock purchase plan and the unvested portion of the reporting person’s RSU grants.

SEC Form 4

FORM 4

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

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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Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

X

Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

1. Name and Address of Reporting Person^*

Tang Carolyn C.

(Last) (First) (Middle)

C/O ARCUS BIOSCIENCES, INC.

3928 POINT EDEN WAY

(Street)

HAYWARD CA 94545

(City) (State) (Zip)

2. Issuer Name and Ticker or Trading Symbol
Arcus Biosciences, Inc. [ RCUS ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	General Counsel

3. Date of Earliest Transaction (Month/Day/Year)
12/16/2025

4. If Amendment, Date of Original Filed (Month/Day/Year)

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

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	12/16/2025		S		7,658(1)	D	$21.8843(2)	131,544(3)(4)	D
Common Stock	12/17/2025		S		6,810(1)	D	$22.1595(5)	124,734(4)	D

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 Securities Underlying Derivative Security (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: 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

Explanation of Responses:

1. Represents shares sold by the issuer on the reporting person's behalf to cover tax withholding obligations in connection with the vesting of certain RSUs (previously reported in Table I) following the date of grant. The sale occurred automatically pursuant to the Issuer's equity administration policy, which was implemented on May 22, 2025, and does not represent a discretionary trade by the reporting person.

2. The price reported in column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $21.42 to $22.39, inclusive. The reporting person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in this footnote.

3. Includes 1 share purchased on November 30, 2025 through the Company's Employee Stock Purchase Plan.

4. Includes the unvested portion of the reporting person's RSU grants.

5. The price reported in column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $21.92 to $22.42, inclusive. The reporting person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in this footnote.

Remarks:

	/s/ Carolyn Tang, Attorney-in-Fact	12/18/2025
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
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