Atrium Therapeutics, Inc. · NASDAQ:RNA
Atrium Therapeutics, Inc. shareholders
As of Jun 30, 2026, 151 institutions reported holding Atrium Therapeutics, Inc., 90.6% of its shares. Largest: Sessa Capital IM, L.P., T. Rowe Price and BlackRock. New holders, exits, insiders and big stakes, each with its filing.
| Holder | Shares | % of Atrium Therapeutics, Inc. | Change | Filed |
|---|---|---|---|---|
| Sessa Capital IM, L.P. | 1.5M | 8.8% | +949K | Aug 14, 2026 |
| T. Rowe Price | 1.47M | 8.6% | −80,226 | Aug 14, 2026 |
| BlackRock | 1.45M | 8.5% | +242K | Aug 7, 2026 |
| Crcm LP | 1.28M | 7.5% | new | Aug 18, 2026 |
| Vanguard | 948K | 5.5% | −124K | Aug 13, 2026 |
| TIG Advisors, LLC | 562K | 3.3% | −46,019 | Aug 14, 2026 |
| Arbiter Partners Capital Management LLC | 523K | 3.1% | +293K | Aug 19, 2026 |
| Cantor Fitzgerald, L. P. | 514K | 3.0% | +278K | Aug 19, 2026 |
| Geode Capital | 387K | 2.3% | +67,098 | Aug 12, 2026 |
| Two Sigma | 345K | 2.0% | +167K | Aug 14, 2026 |