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$RNA All transactions

Atrium Therapeutics, Inc.

A

$ Value

$0

Shares

60,000

Price

$0

Filed

Apr 22

Insider

Name

Winslow Brendan R.

Title

Chief Financial Officer

CIK

0002105552

Roles

Officer

Transaction Details

Transaction Date

2026-04-20

Code

A

Table

Derivative

Ownership

Direct

Equity Swap

No

Shares After

60,000

Footnotes

Represents an award of restricted stock units ("RSUs"). Each RSU represents a contingent right to receive one share of the Issuer's common stock. Twenty-five percent (25%) of the RSUs shall vest on March 20, 2027, with the remaining RSUs vesting in three (3) substantially equal yearly installments each year thereafter, subject to the Reporting Person's continuous service to the Issuer on each such vesting date. | Twenty-five percent (25%) of the shares underlying this option shall vest and become exercisable on March 20, 2027, with the remaining shares vesting in thirty-six (36) substantially equal monthly installments each month thereafter, subject to the Reporting Person's continuous service to the Issuer on each such vesting date.

Filing Info

Accession No.

0001193125-26-170960

Form Type

4

Issuer CIK

0002093101

Winslow Brendan R.'s History

Date Ticker Type Value
2026-04-20 RNA A $0
2026-04-20 RNA A $0

Other Insiders at RNA (90d)

Insider Bought Sold Last
Hughes Steven George
Chief Medical Officer
2026-04-20
Gallagher Kathleen P.
See Remarks
2026-04-20
Kenney Stephanie
See Remarks
2026-04-20
Winslow Brendan R.
Chief Financial Officer
2026-04-20
Hoyos Rocio Martin
Chief Strategy Officer
2026-04-20
Younis Husam
Chief Scientific Officer
2026-04-20