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 |
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%
Information on this page is provided for informational purposes only and is not a recommendation to buy, sell or hold any security. Investing involves risk, including possible loss of principal. Market data is delayed at least 15 minutes and is provided without warranty. Analyst ratings, price targets and company data come from third-party sources. Past performance does not guarantee future results.