Arcus Biosciences, Inc. — Director's Dealing 2025

Dec 18, 2025

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: Arcus Biosciences, Inc. (RCUS)
CIK: 0001724521
Period of Report: 2025-12-16

Reporting Person: Jaen Juan C. (President)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2025-12-16	Common Stock	S	11225	$21.8843	Disposed	355995	Direct
2025-12-17	Common Stock	S	9983	$22.1595	Disposed	346012	Direct

Holdings (Non-Derivative)

Security	Shares	Ownership
Common Stock	954063	Indirect

Footnotes

F1: 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.

F2: 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.

F3: Includes the unvested portion of the reporting person's RSU grants.

F4: 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.