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Atrium Therapeutics, Inc. (RNA)

Atrium Therapeutics, Inc. (RNA) Insider Trading

Directors, officers and holders of more than 10% of RNA report their trades in its stock on SEC Form 4, within two business days. Each row below is one Form 4 transaction line. The one-letter code says what kind of transaction it was: only P (purchase) and S (sale) are open-market or private trades; awards, option exercises, tax withholding and gifts carry other codes.

Recent Form 4 transactions

The 50 most recent of 279 transactions on file: 0 with code P, 18 with code S and 32 with other codes.

DateInsiderCodeShares
Sep 18, 2026Younis HusamF Tax Payment11,216
Sep 18, 2026Winslow Brendan R.F Tax Payment6,742
Sep 18, 2026Boyce SarahF Tax Payment126,418
Sep 18, 2026Gallagher Kathleen P.F Tax Payment11,632
Sep 18, 2026Flanagan W. MichaelF Tax Payment22,812
Sep 18, 2026Kenney StephanieF Tax Payment2,375
Sep 18, 2026Hughes Steven GeorgeF Tax Payment21,459
Sep 18, 2026Hoyos Rocio MartinF Tax Payment8,320
Apr 20, 2026Gallagher Kathleen P.A Award205,000
Apr 20, 2026Younis HusamA Award60,000
Apr 20, 2026Winslow Brendan R.A Award30,000
Apr 20, 2026Hughes Steven GeorgeA Award30,000
Apr 20, 2026Kenney StephanieA Award60,000
Apr 20, 2026Hoyos Rocio MartinA Award60,000
Apr 20, 2026Hoyos Rocio MartinA Award30,000
Apr 20, 2026Kenney StephanieA Award30,000
Apr 20, 2026Winslow Brendan R.A Award60,000
Apr 20, 2026Younis HusamA Award30,000
Apr 20, 2026Gallagher Kathleen P.A Award102,500
Apr 20, 2026Hughes Steven GeorgeA Award60,000
Feb 27, 2026WILSON TROY EDWARDA Award20,000
Feb 27, 2026Flanagan W. MichaelA Award20,000
Feb 27, 2026BOESS CARSTENA Award20,000
Feb 27, 2026Boyce SarahA Award20,000
Feb 27, 2026Skerjanec SimonaA Award20,000
Jan 21, 2026Hughes Steven GeorgeS Sale2,017
Jan 21, 2026Flanagan W. MichaelS Sale2,558
Jan 21, 2026Boyce SarahS Sale6,394
Jan 21, 2026Hughes Steven GeorgeS Sale2,878
Jan 21, 2026Boyce SarahS Sale7,993
Jan 21, 2026Flanagan W. MichaelS Sale3,976
Jan 21, 2026MacLean Michael FS Sale1,807
Jan 21, 2026MacLean Michael FS Sale2,735
Jan 21, 2026LEVIN ARTHUR AS Sale1,758
Jan 21, 2026McCarthy TeresaS Sale1,453
Jan 21, 2026McCarthy TeresaS Sale1,476
Jan 7, 2026Flanagan W. MichaelS Sale2,373
Jan 7, 2026Moriarty John BS Sale2,374
Jan 7, 2026MacLean Michael FS Sale1,974
Jan 7, 2026McCarthy TeresaS Sale1,965
Jan 7, 2026Hughes Steven GeorgeS Sale2,373
Jan 7, 2026Calderaro Charles IIIS Sale3,727
Jan 7, 2026Boyce SarahS Sale8,576
Dec 19, 2025LEVIN ARTHUR AG Gift1,330
Dec 18, 2025Boyce SarahG Gift29,159
Dec 17, 2025Calderaro Charles IIIA Award23,250
Dec 17, 2025Calderaro Charles IIIF Tax Payment9,726
Dec 17, 2025Flanagan W. MichaelF Tax Payment13,695
Dec 17, 2025Flanagan W. MichaelA Award27,500
Dec 17, 2025Mosbrooker EricA Award72,000

The full Form 4 history is on the RNA company page (Insider Trades card, View all).

Questions about this data

Which insider transactions are open-market trades?

Code P (open market or private purchase) and code S (open market or private sale). Code F is shares withheld to pay tax on vesting stock, A is an award from the company, M and X are option exercises and G is a gift. None of those is the insider choosing to buy or sell in the market.

How quickly are insider trades reported?

A Form 4 is due before the end of the second business day after the trade. The date shown is the transaction date from the form.

Who has to file Form 4?

Officers, directors and beneficial owners of more than 10% of a class of the company’s registered equity, under Section 16 of the Securities Exchange Act.

Look up any code in the Form 4 transaction code reference, or read Form 4 codes explained.