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Schedule 13G

RNA Schedule 13G filing by BlackRock

BlackRock reported beneficial ownership of 892.4K shares, representing 12% of ATRIUM THERAPEUTICS INC in this filing.

FiledApr 27, 2026
Ownership dateMar 31, 2026
Reported shares892.4K
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 880.2K
Shared voting power 892.4K
Sole dispositive power 892.4K
Shared dispositive power 892.4K
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$12.90as of Apr 27, 2026
Latest tracked price$11.64as of Aug 5, 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
0002012383-26-001673
Form
Schedule 13G
Open SEC filing View RNA ownership history
Read the filing in context

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

How to read a Schedule 13G → Does a 13G mean the shares were just bought? → Filing date vs. ownership date →