Atrium Therapeutics
RNA · NASDAQ
$7.98+$0.37 (+4.86%)TodayMarket closed ·
Prev close $7.61
Who owns RNA
Largest institutional holders, from their latest 13F filings
The 10 largest institutions hold 42.3% of RNA’s shares.
- Sessa Capital8.8%
- T. Rowe Price Associates, Inc.8.3%
- BlackRock Institutional Trust Company, N.A.6.3%
- Vanguard Capital Management, LLC4.3%
- Next 6 largest institutions14.7%
- All other shareholders57.7%
| Holder | Shares | % of shares |
|---|---|---|
| Sessa Capital | 1.50M | 8.77% |
| T. Rowe Price Associates, Inc. | 1.43M | 8.33% |
| BlackRock Institutional Trust Company, N.A. | 1.07M | 6.27% |
| Vanguard Capital Management, LLC | 730.83K | 4.27% |
| CRCM L.P. | 641.54K | 3.75% |
| TIG Advisors, L.L.C. | 561.53K | 3.28% |
| Geode Capital Management, L.L.C. | 386.93K | 2.26% |
| Two Sigma Investments, LP | 345.48K | 2.02% |
| 683 Capital Management LLC | 300.00K | 1.75% |
| BlackRock Financial Management, Inc. | 274.73K | 1.61% |
Largest mutual fund holders
| Holder | Shares | % of shares |
|---|---|---|
| T. Rowe Price Health Sciences Fund | 566.43K | 3.31% |
| Vanguard Total Stock Market Index Fund | 518.42K | 3.03% |
| T. Rowe Price New Horizons Fund | 443.26K | 2.59% |
| iShares Russell 2000 ETF | 375.72K | 2.20% |
| Vanguard Extended Market Index Fund | 188.63K | 1.10% |
Insider trades
Form 4 filings by officers, directors and large holders
Insiders made no open-market buys or sales of RNA in the last 6 months.
| Insider | Type | Shares | Value |
|---|---|---|---|
| Younis Husam | Tax withholding | 11.22K | $100.38K |
| Kenney Stephanie | Tax withholding | 2.38K | $21.26K |
| Winslow Brendan R. | Tax withholding | 6.74K | $60.34K |
| Hoyos Rocio Martin | Tax withholding | 8.32K | $74.46K |
| Gallagher Kathleen P. | Tax withholding | 11.63K | $104.11K |
| Flanagan W. Michael | Tax withholding | 22.81K | $204.17K |
| Hughes Steven George | Tax withholding | 21.46K | $192.06K |
| Boyce Sarah | Tax withholding | 126.42K | $1.13M |
| Kenney Stephanie | Award | 60.00K | — |
| Kenney Stephanie | Award | 30.00K | — |
Short interest
Settled Sep 30, 2026
- Shares short
- 3.40M
- Days to cover
- 8.27
- % of shares outstanding
- 19.85%
- Average daily volume
- 410.85K
- Change since last report
- −0.1%
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