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Atrium Therapeutics, Inc.

RNA
Healthcare|Biotechnology|US
$8.34
+0.02 (+0.24%)
Tangible Book / Share
$12.54
Cash / Share
$15.45

Ownership Breakdown

87.9%
Float
17.1M
Shares Outstanding
15.0M
Float Shares

Major Holders (17)

Combined: 81.7%

Holders of 5%+ from their latest Schedule 13D/13G filing in the last two years. Percentages are as of each filing date.

HolderType% of ClassSharesFiledFiling
The Vanguard GroupInvestment adviser9.57%13,219,759Oct 30, 202513D/G
Sessa Capital IM, L.P.IA, PN8.80%1,500,000Aug 14, 202613D/G
John PetryHC, IN8.80%1,500,000Aug 14, 202613D/G
T. Rowe Price Associates, Inc.Investment adviser8.60%1,472,984Aug 14, 202613D/G
Wellington Management Company LLPInvestment adviser7.50%9,684,556May 12, 202513D/G
BlackRock, Inc.Holding company6.60%1,135,757Jul 27, 202613D/G
Avoro Capital Advisors LLCIA, OO5.54%8,515,792Feb 17, 202613D/G
Behzad AghazadehHC, IN5.54%8,515,792Feb 17, 202613D/G
Janus Henderson Group PLCHolding company4.60%6,939,503Feb 17, 202613D/G
Bristol-Myers Squibb CompanyCorporation4.30%5,075,304Nov 13, 202413D/G
Roderick WongHC, IN3.10%4,686,110Oct 29, 202513D/G
RTW Investments, LPIA, PN3.10%4,686,110Oct 29, 202513D/G
FMR LLCHolding company2.10%2,958,712Nov 7, 202513D/G
Abigail P. JohnsonIndividual2.10%2,958,712Nov 7, 202513D/G
Wellington Investment Advisors Holdings LLPHolding company0.50%723,118Feb 10, 202613D/G
Wellington Group Holdings LLPHolding company0.50%723,118Feb 10, 202613D/G
Wellington Management Group LLPHolding company0.50%723,118Feb 10, 202613D/G

Insider Trades (8)

Last 4 quarters: 0 acquired · 210,974 disposed
InsiderPositionDateTypeSharesPriceValueFiling
Younis HusamChief Scientific OfficerSep 18, 2026TAX W/H11,216$8.95$100.4KForm 4
Hughes Steven GeorgeChief Medical OfficerSep 18, 2026TAX W/H21,459$8.95$192.1KForm 4
Flanagan W. MichaeldirectorSep 18, 2026TAX W/H22,812$8.95$204.2KForm 4
Boyce SarahdirectorSep 18, 2026TAX W/H126,418$8.95$1.1MForm 4
Kenney StephanieSee RemarksSep 18, 2026TAX W/H2,375$8.95$21.3KForm 4
Gallagher Kathleen P.director, officer: See RemarksSep 18, 2026TAX W/H11,632$8.95$104.1KForm 4
Winslow Brendan R.Chief Financial OfficerSep 18, 2026TAX W/H6,742$8.95$60.3KForm 4
Hoyos Rocio MartinChief Strategy OfficerSep 18, 2026TAX W/H8,320$8.95$74.5KForm 4