CARSTEN BOESS - 27 Feb 2026 Form 4 Insider Report for Atrium Therapeutics, Inc.

Role
Director
Signature
/s/ Adam Grajewski, Attorney-in-Fact
Issuer symbol
N/A
Transactions as of
27 Feb 2026
Net transactions value
$0
Form type
4
Filing time
02 Mar 2026, 18:00:07 UTC
Previous filing
26 Feb 2026
SEC
View on sec.gov

Reporting Owners (1)

Name Relationship Address Signature Signature date CIK
BOESS CARSTEN Director C/O ATRIUM THERAPEUTICS, INC., 10578 SCIENCE CENTER DRIVE, SUITE 125, SAN DIEGO /s/ Adam Grajewski, Attorney-in-Fact 02 Mar 2026 0001277495

Derivative Securities (e.g., puts, calls, warrants, options, convertible securities)

Type Sym Class Transaction Value $ Shares Change % * Price $ Shares After Date Underlying Class Amount Exercise Price Ownership Footnotes
transaction Stock Option (Right to Buy) Award $0 +20,000 $0.000000 20,000 27 Feb 2026 Common Stock 20,000 $14.75 Direct F1
* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id Content
F1 The options were granted on February 27, 2026 and the shares underlying the options vest in equal monthly installments over the three years following the grant date, subject to the Reporting Person's continuous service to the Issuer on each such vesting date.