Form4insider filings, from the source

Company · CIK 0002093101 · SIC 2834 — Pharmaceutical Preparations · Nasdaq

Atrium Therapeutics, Inc. · RNA

Insider activity reported against this company. All insider holders · On EDGAR ↗

1M3M6M1Y2YAll datashares as filed — not split-adjusted

Reported at this company — common stock

TradeReported (ET)InsiderSharesAvg priceTotalOwned afterΔ stakeFlags
Sep 18, 2026 FForm 4 →Sep 22, 4:24 pm EDTHusam YounisChief Scientific Officer11,216$8.95$100,38341,441—
Sep 18, 2026 FForm 4 →Sep 22, 4:23 pm EDTSteven George HughesChief Medical Officer21,459$8.95$192,05851,638—
Sep 18, 2026 FForm 4 →Sep 22, 4:20 pm EDTW. Michael FlanaganDirector22,812$8.95$204,16731,974—
Sep 18, 2026 FForm 4 →Sep 22, 4:20 pm EDTSarah BoyceDirector126,418$8.95$1,131,441138,668—
Sep 18, 2026 FForm 4 →Sep 22, 4:18 pm EDTStephanie KenneySee Remarks2,375$8.95$21,25633,085—
Sep 18, 2026 FForm 4 →Sep 22, 4:17 pm EDTKathleen P. GallagherSee Remarks, Director11,632$8.95$104,106119,729—
Sep 18, 2026 FForm 4 →Sep 22, 4:17 pm EDTBrendan R. WinslowChief Financial Officer6,742$8.95$60,34136,859—
Sep 18, 2026 FForm 4 →Sep 22, 4:15 pm EDTRocio Martin HoyosChief Strategy Officer8,320$8.95$74,46438,340—

Reported at this company — derivatives (options, RSUs, warrants)

No reported derivative activity in this period.