Atrium TherapeuticsRNA
13F holders, Q2 2026 (June 30)154holders −9
35new positions
46sold out
5famous investors
$13.45avg. 13F price*
At the end of Q2 2026, 154 institutions reported holding Atrium Therapeutics Inc. (RNA) in their 13F filings, down 9 from Q1 2026. 35 opened new positions and 46 sold out. The largest holders were Sessa Capital IM, L.P. ($20.2M), T. Rowe Price Associates Inc. ($19.8M) and BlackRock, Inc. ($19.5M). 5 famous investors held it, including Paul Tudor Jones (0.0% of Tudor Investment Corporation's portfolio), Israel Englander (0.0% of Millennium Management's portfolio) and Cliff Asness (0.0% of AQR Capital Management's portfolio).
- Company
- Atrium Therapeutics Inc.
- CUSIP
- 04965N104
- Latest filing quarter
- Q2 2026
History
Number of 13F holders
Total Exit/New Position Q1 2026 → Q2 2026
| Institutions | Total Value | |
|---|---|---|
| New Positions | 35 | $21.8M |
| Exits | 46 | $44.5M |
All 13F filers, Q1 2026 → Q2 2026: 3,881,482 shares bought and 4,416,812 shares sold, net −535,330 shares. Counts holders who added, trimmed, opened or closed a position; split-adjusted.
Ownership 154 holders
| Sessa Capital IM, L.P. | 0.35% | Add +172.0% | 1,500,000 | $20.2M |
| T. Rowe Price Associates Inc. | 0.00% | Reduce -5.2% | 1,472,984 | $19.8M |
| BlackRock, Inc. | 0.00% | Add +20.1% | 1,447,476 | $19.5M |
| Vanguard Capital Management LLC | 0.00% | Add +16.6% | 730,831 | $9.8M |
| CRCM LP | 5.67% | New | 641,539 | $8.6M |
| TIG Advisors, LLC | 0.35% | Reduce -7.6% | 561,533 | $7.6M |
| Geode Capital Management, LLC | 0.00% | Add +21.0% | 386,929 | $5.2M |
| Two Sigma Investments, LP | 0.00% | Add +93.5% | 345,481 | $4.6M |
| Goldman Sachs Group Inc. | 0.00% | Reduce -11.3% | 310,341 | $4.2M |
| 683 Capital Management, LLC | 0.39% | No change | 300,000 | $4.0M |
| State Street Corp. | 0.00% | Add +5.7% | 271,762 | $3.7M |
| Arbiter Partners Capital Management LLC | 1.88% | Add +13.6% | 261,288 | $3.5M |
| Cantor Fitzgerald, L. P. | 0.07% | Add +9.0% | 256,917 | $3.5M |
| Slotnik Capital, LLC | 0.89% | Add +31.3% | 237,637 | $3.2M |
| Weiss Asset Management LP | 0.05% | Reduce -8.7% | 219,730 | $3.0M |
| Millennium Management | 0.00% | Add +5.1% | 200,559 | $2.7M |
| Schonfeld Strategic Advisors LLC | 0.01% | Add +22.4% | 199,158 | $2.7M |
| AQR Capital Management | 0.00% | New | 172,235 | $2.3M |
| Nexpoint Asset Management, L.P. | 0.14% | No change | 150,025 | $2.0M |
| Polar Asset Management Partners Inc. | 0.05% | Add +114.3% | 150,000 | $2.0M |
| Squarepoint Ops LLC | 0.00% | Reduce -36.6% | 146,743 | $2.0M |
| Bracebridge Capital, LLC | 0.41% | No change | 139,239 | $1.9M |
| Nomura Holdings Inc. | 0.01% | Add +0.0% | 137,394 | $1.8M |
| Yakira Capital Management, Inc. | 0.53% | Add +5.1% | 133,047 | $1.8M |
| Bank of America Corp. | 0.00% | Reduce -2.5% | 132,833 | $1.8M |
| Charles Schwab Investment Management Inc. | 0.00% | Add +11.7% | 130,217 | $1.8M |
| Tudor Investment Corporation | 0.01% | Add +81.6% | 129,591 | $1.7M |
| DAFNA Capital Management LLC | 0.33% | New | 128,000 | $1.7M |
| Creek Drive Management Group LLC | 1.06% | Add +6.3% | 127,600 | $1.7M |
| Norges Bank | 0.00% | — | 126,575 | $1.7M |
| Anson Funds Management LP | 0.16% | New | 125,000 | $1.7M |
| Northern Trust Corp. | 0.00% | Add +21.5% | 119,781 | $1.6M |
| ExodusPoint Capital Management, LP | 0.01% | Add +51.4% | 117,275 | $1.6M |
| Trium Capital LLP | 0.96% | New | 113,278 | $1.5M |
| TD Asset Management Inc | 0.00% | No change | 111,200 | $1.5M |
| Vanguard Fiduciary Trust Co. | 0.00% | Add +15.6% | 109,961 | $1.5M |
| Jane Street Group, LLC | 0.00% | Add +450.3% | 109,810 | $1.5M |
| Athos Capital Ltd | 0.52% | No change | 107,965 | $1.5M |
| AWM Investment Company, Inc. | 0.13% | Add +115.0% | 107,500 | $1.4M |
| Balyasny Asset Management L.P. | 0.00% | Reduce -55.0% | 105,875 | $1.4M |
| Marble Bar Asset Management LLP | 0.97% | Reduce -29.4% | 103,849 | $1.4M |
| Vanguard Portfolio Management LLC | 0.00% | Reduce -70.6% | 101,195 | $1.4M |
| BlueCrest Capital Management Ltd | 0.06% | New | 100,000 | $1.3M |
| Adage Capital Partners Gp, L.L.C. | 0.00% | Reduce -45.5% | 100,000 | $1.3M |
| Credit Industriel Et Commercial | 0.22% | Add +290.1% | 89,723 | $1.2M |
| Groupe la Francaise | 0.01% | Add +170.3% | 80,273 | $1.1M |
| FIL Ltd | 0.00% | Reduce -2.5% | 76,500 | $1.0M |
| Caption Management, LLC | 0.04% | Reduce -27.3% | 75,277 | $1.0M |
| Citadel Advisors | 0.00% | Reduce -38.5% | 67,639 | $910K |
| Manufacturers Life Insurance Company, The | 0.00% | Add +0.8% | 62,853 | $845K |
| ADAR1 Capital Management, LLC | 0.04% | No change | 57,688 | $776K |
| Franklin Resources Inc. | 0.00% | New | 56,699 | $763K |
| Jacobs Levy Equity Management, Inc. | 0.00% | New | 53,992 | $726K |
| Oddo BHF Asset Management Sas | 0.03% | No change | 45,090 | $606K |
| Caxton Associates LLP | 0.01% | No change | 44,230 | $595K |
| Alethea Capital Management, LLC | 0.24% | No change | 43,758 | $589K |
| Canada Pension Plan Investment Board | 0.00% | No change | 41,970 | $564K |
| Morgan Stanley | 0.00% | Reduce -74.6% | 41,942 | $564K |
| Saba Capital Management, L.P. | 0.02% | No change | 39,640 | $533K |
| Bank of New York Mellon Corp | 0.00% | Reduce -10.2% | 39,252 | $528K |
| Y-Intercept (Hong Kong) Ltd | 0.01% | New | 35,103 | $472K |
| Kennedy Capital Management LLC | 0.01% | Add +3.0% | 34,979 | $470K |
| FMR LLC | 0.00% | Add +14.5% | 33,532 | $451K |
| Moran Wealth Management, LLC | 0.01% | New | 33,320 | $448K |
| Boussard & Gavaudan Gestion Sas | 0.05% | — | 32,845 | $447K |
| LMR Partners LLP | 0.00% | No change | 32,500 | $437K |
| Los Angeles Capital Management LLC | 0.00% | New | 31,477 | $423K |
| Nuveen, LLC | 0.00% | Add +22.8% | 31,071 | $418K |
| Jump Financial, LLC | 0.00% | New | 31,017 | $417K |
| Quantinno Capital Management LP | 0.00% | Add +120.2% | 27,418 | $369K |
| Twin Securities, Inc. | 0.18% | Reduce -46.9% | 26,517 | $357K |
| Odyssean, LLC | 0.05% | New | 21,233 | $286K |
| Brevan Howard Capital Management LP | 0.00% | Reduce -34.2% | 20,834 | $280K |
| Fractal Investments LLC | 0.03% | No change | 20,000 | $269K |
| UBS Group AG | 0.00% | Reduce -60.7% | 19,572 | $263K |
| Healthcare of Ontario Pension Plan Trust Fund | 0.00% | Reduce -9.7% | 18,590 | $250K |
| Vestcor Inc | 0.01% | No change | 17,499 | $235K |
| Wells Fargo & Company | 0.00% | Add +52.9% | 17,451 | $235K |
| Alliancebernstein L.P. | 0.00% | Add +31.9% | 17,110 | $229K |
| Rhumbline Advisers | 0.00% | Add +10.9% | 16,579 | $223K |
| Bluefin Capital Management, LLC | 0.06% | New | 16,011 | $215K |
| Renaissance Technologies | 0.00% | New | 14,971 | $201K |
| Deutsche Bank AG | 0.00% | Add +49.4% | 14,967 | $201K |
| Invesco Ltd. | 0.00% | Add +39.1% | 14,174 | $191K |
| Jupiter Topco LLC | 0.00% | — | 13,833 | $186K |
| AlphaCentric Advisors LLC | 0.15% | Add +1.4% | 13,478 | $181K |
| Axq Capital, LP | 0.02% | New | 11,377 | $153K |
| Kestra Private Wealth Services, LLC | 0.00% | New | 10,370 | $139K |
| MetLife Investment Management, LLC | 0.00% | Add +16.3% | 10,283 | $138K |
| Corsicana & Co. | 0.06% | New | 9,820 | $132K |
| JPMorgan Chase & Co. | 0.00% | Reduce -22.0% | 9,388 | $128K |
| BNP Paribas Financial Markets | 0.00% | Reduce -4.4% | 7,901 | $106K |
| Citigroup Inc. | 0.00% | Add +947.8% | 6,685 | $90K |
| MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd. | 0.00% | Reduce -30.4% | 6,602 | $89K |
| Vanguard Global Advisers, LLC | 0.00% | No change | 5,585 | $75K |
| Russell Investments Group, Ltd. | 0.00% | Add +16.6% | 4,475 | $60K |
| Skandinaviska Enskilda Banken AB (publ) | 0.00% | New | 4,400 | $59K |
| Walleye Trading LLC | 0.00% | Add +9.7% | 3,978 | $54K |
| Erste Asset Management GmbH | 0.00% | No change | 3,600 | $49K |
| Quantbot Technologies LP | 0.00% | New | 3,614 | $49K |
"% of holder's portfolio" is RNA's weight in each manager's 13F, not the share of Atrium Therapeutics Inc. the manager owns.