Atrium Therapeutics
Targets genetic drivers of rare cardiomyopathies with tissue-directed siRNA medicines.
$13.64
After-hours close+0.01 (+0.07%)
At close$13.63(−2.50%)
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Breakdown13F · Form 4
Institutions 84.61%Insiders —
Shares outstanding 17.11M · Float 15.72M · 91.9% free float
Institutions13F, as of Jun 30, 2026
159 holders · 14.47M shares · 41 new positions · 88 increased · 36 reduced · 46 closed
| Holder | Shares | % outstanding | Chg q/q | Filed |
|---|---|---|---|---|
| Sessa Capital Im, L.P. | 1.50M | 8.77% | +948.6K | Aug 14, 2026 |
| Price T Rowe Associates Inc /MD/ | 1.47M | 8.61% | −80.2K | Aug 14, 2026 |
| BlackRock, Inc. | 1.45M | 8.46% | +242.2K | Aug 7, 2026 |
| Vanguard Capital Management LLC | 730.8K | 4.27% | +104.0K | Aug 13, 2026 |
| CRCM LP | 641.5K | 3.75% | +641.5Knew | Aug 18, 2026 |
| Tig Advisors, LLC | 561.5K | 3.28% | −46.0K | Aug 14, 2026 |
| Geode Capital Management, LLC | 386.9K | 2.26% | +67.1K | Aug 12, 2026 |
| Two Sigma Investments, LP | 345.5K | 2.02% | +166.9K | Aug 14, 2026 |
Beneficial owners13D/G · 5% or more, as filed
| Holder | % of class | Shares | Form | Filed |
|---|---|---|---|---|
| Avoro Capital Advisors LLCincl. Behzad Aghazadeh | 8.30% | 9.94M | 13G | Nov 14, 2024 ↗ |
| Wellington Group Holdings LLPincl. Wellington Management Group LLP, Wellington Investment Advisors Holdings LLP +1 more | 5.97% | 7.03M | 13G | Nov 8, 2024 ↗ |
InsidersForm 4
Latest trades
Nothing filed in the last 12 months.
CongressHouse and Senate disclosures
Not reported.