ATRIUM THERAPEUTICS INC COM is a security (CUSIP 04965N104) tracked across SEC portfolio filings. 167 institutional managers reported $180.4M on Form 13F as of 2026-06-30; 22 registered fund positions totaling $22.2M via N-PORT as of 2026-05-31.
Showing 15 of 167 managers by value.
| Manager | Location | Value | Shares |
|---|---|---|---|
| BlackRock, Inc. | New York, NY | $16.1M | 1,205,291 |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | BALA CYNWYD, PA | $13.8M | 11,343 |
| RA CAPITAL MANAGEMENT, L.P. | Boston, MA | $11.6M | 864,102 |
| TIG Advisors, LLC | New York, NY | $8.1M | 607,552 |
| Pentwater Capital Management LP | Naples, FL | $8.1M | 602,649 |
| O'Connor Alternative Investments LLC | NEW YORK, NY | $7.7M | 578,011 |
| Sessa Capital IM, L.P. | NEW YORK, NY | $7.4M | 551,391 |
| GOLDMAN SACHS GROUP INC | NEW YORK, NY | $4.7M | 349,950 |
| FARALLON CAPITAL MANAGEMENT LLC | SAN FRANCISCO, CA | $4.7M | 349,360 |
| GEODE CAPITAL MANAGEMENT, LLC | BOSTON, MA | $4.3M | 319,831 |
| 683 Capital Management, LLC | NEW YORK, NY | $4.0M | 300,000 |
| Bellevue Group AG | Kuesnacht, V8 | $3.5M | 263,096 |
| STATE STREET CORP | BOSTON, MA | $3.4M | 257,086 |
| Weiss Asset Management LP | BOSTON, MA | $3.2M | 240,701 |
| CANTOR FITZGERALD, L. P. | NEW YORK, NY | $3.2M | 235,637 |
Showing 15 of 22 fund positions by value.
| Fund | Registrant | Value | % of fund |
|---|---|---|---|
| T. Rowe Price Health Sciences Fund, Inc. | T. ROWE PRICE HEALTH SCIENCES FUND, INC. | $8.9M | 8.18% |
| T. Rowe Price New Horizons Fund, Inc. | T. ROWE PRICE NEW HORIZONS FUND, INC. | $5.9M | 4.64% |
| BlackRock Event Driven Equity Fund | BlackRock Large Cap Series Funds, Inc. | $2.3M | 4.77% |
| VANGUARD EXTENDED MARKET INDEX FUND | VANGUARD INDEX FUNDS | $2.1M | 0.26% |
| VANGUARD RUSSELL 2000 INDEX FUND | VANGUARD SCOTTSDALE FUNDS | $818K | 0.47% |
| The Merger Fund | Merger Fund | $623K | 2.52% |
| T. Rowe Price Health Sciences Portfolio | T. ROWE PRICE EQUITY SERIES, INC. | $558K | 8.41% |
| Master Small Cap Index Series | Quantitative Master Series LLC | $257K | 0.53% |
| Fidelity SAI Merger Arbitrage Fund | Fidelity Greenwood Street Trust | $192K | 3.35% |
| The Gabelli ABC Fund | Gabelli Investor Funds Inc | $134K | 3.21% |
| VANGUARD BALANCED INDEX FUND | VANGUARD VALLEY FORGE FUNDS | $107K | 0.02% |
| VANGUARD INSTITUTIONAL TOTAL STOCK MARKET INDEX FUND | VANGUARD INSTITUTIONAL INDEX FUNDS | $92K | 0.03% |
| GDL Fund | GDL Fund | $67K | 5.81% |
| Virtus Westchester Event-Driven Fund | Virtus Event Opportunities Trust | $36K | 2.75% |
| Enterprise Mergers and Acquisitions Fund | Gabelli 787 Fund, Inc. | $27K | 4.69% |