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Schedule 13G/A

RCUS Schedule 13G/A filing by BlackRock

BlackRock reported beneficial ownership of 12.7M shares, representing 12% of Arcus Biosciences, Inc. in this filing.

FiledJan 8, 2026
Ownership dateDec 31, 2025
Reported shares12.7M
Reported ownership12%
Ownership details

Voting and dispositive power reported in the filing

These figures describe the reporting filer’s disclosed voting and investment authority. They should be read together with the reported share count and percentage.

Sole voting power 12.6M
Shared voting power 12.7M
Sole dispositive power 12.7M
Shared dispositive power 12.7M
Compared with the prior filing

How the reported position changed

This compares the current filing with the previous tracked Schedule 13 filing from the same reporting CIK for RCUS. A change between filings does not by itself establish when shares were bought or sold.

Previous filingNov 8, 2024
Reported share change+3,004,528
Ownership percentage change+1.4 pts
Previous filingThis filing
Reported shares9.7M12.7M
Reported ownership10.6%12%
Price context

Price dates alongside the ownership filing

Price data provides market context around the disclosure. It does not identify the filer’s actual transaction price.

Close near filing date$21.35as of Jan 8, 2026
Latest tracked price$28.80as of Aug 4, 2026
Source

Original filing and accession

Use the SEC filing as the primary source when you need the complete disclosure, footnotes, exhibits, or reporting-person details.

Reporting filer
BlackRock
CIK
CIK0002012383
Accession
0002012383-26-000038
Form
Schedule 13G/A
Read the filing in context

Understand what a Schedule 13 filing does—and does not—tell you.