ATRIUM THERAPEUTICS INC

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RNA·04965N104·US·Common Stock-13D/G

RNA (ATRIUM THERAPEUTICS INC) is held by 81 institutional investors as of Q2 2026. Largest holders: BlackRock, Inc. ($19.5M), VANGUARD CAPITAL MANAGEMENT LLC ($9.8M), GEODE CAPITAL MANAGEMENT, LLC ($5.2M). Net institutional sentiment: Mixed.

81

Holders

(5 Elite)

$93.6M

Total Value

47% (86)

Consensus

40 buying - 46 selling

13F: Jun 30, 2026Insider & Congress: Updated regularly

Smart Money Verdict

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Institutional (13F)25

Insider (Form 4)38

Activist (13D/13G)51

Congressional (STOCK Act)32

Holder Quality

52

★★★★★

Elite

42

★★★★

Strong

60

★★★

Solid

18

★★

Below

11

★

Weak

Held by 81 funds

5 elite

Who's Trading

Source dates: Price Aug 28, 2026 · Insiders Jan 23, 2026 · Activists Aug 14, 2026 · Congress none

ActivistRA Capital Management, L.P.0.0%Aug 14, 2026

ActivistT. Rowe Price Associates, Inc.8.6%Aug 14, 2026

ActivistSISessa Capital IM, L.P.8.8%Aug 14, 2026

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Top Holders

Top Holders (81)History

AllNewIncreasedHeldDecreasedExited

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Fund	Action	Shares	Value	Weight	Est. P&L	Conviction
BlackRock, Inc.	Increased	1.4M(+20.1%)	$19.5M	0.0%	-10.84%	34
VAVANGUARD CAPITAL MANAGEMENT LLC	Increased	730,831(+16.6%)	$9.8M	0.0%	-11.16%	32
GEODE CAPITAL MANAGEMENT, LLC	Increased	386,929(+21.0%)	$5.2M	0.0%	-10.76%	32
TWO SIGMA INVESTMENTS, LP	Increased	345,481(+93.5%)	$4.6M	0.0%	-6.56%	43
GOLDMAN SACHS GROUP INC	Decreased	310,341(-11.3%)	$4.2M	0.0%	-12.95%	0
STATE STREET CORP	Increased	271,762(+5.7%)	$3.7M	0.0%	-12.28%	28
CANTOR FITZGERALD, L. P.	Increased	256,917(+9.0%)	$3.5M	0.0%	-11.92%	29
MILLENNIUM MANAGEMENT LLC	Increased	200,559(+5.1%)	$2.7M	0.0%	-12.35%	28
Schonfeld Strategic Advisors LLC	Increased	199,158(+22.4%)	$2.7M	0.0%	-10.64%	32
AQR CAPITAL MANAGEMENT LLC	New	172,235	$2.3M	0.0%	+1.41%	36
SOSquarepoint Ops LLC	Decreased	146,743(-36.6%)	$2M	0.0%	-12.95%	0
NOMURA HOLDINGS INC	Increased	137,394(+0.0%)	$1.8M	0.0%	-12.95%	26
BANK OF AMERICA CORP /DE/	Decreased	132,833(-2.5%)	$1.8M	0.0%	-12.95%	0
CHARLES SCHWAB INVESTMENT MANAGEMENT INC	Increased	130,217(+11.7%)	$1.8M	0.0%	-11.65%	29
TUDOR INVESTMENT CORP ET AL	Increased	129,591(+81.6%)	$1.7M	0.0%	-7.04%	40
NORTHERN TRUST CORP	Increased	119,781(+21.5%)	$1.6M	0.0%	-10.72%	31
ExodusPoint Capital Management, LP	Increased	117,275(+51.4%)	$1.6M	0.0%	-8.55%	36
TD ASSET MANAGEMENT INC	Unchanged	111,200	$1.5M	0.0%	-12.95%	0
VFVANGUARD FIDUCIARY TRUST CO	Increased	109,961(+15.6%)	$1.5M	0.0%	-11.26%	29
JANE STREET GROUP, LLC	Increased	109,810(+450.3%)	$1.5M	0.0%	-1.54%	41

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Data sourced from four public-disclosure sources: SEC 13F, Form 4, 13D/13G, and House/Senate STOCK Act disclosures. Not financial advice. Full disclaimer