DaveManuel.com · Institutional Ownership · Who Owns It
Atrium Therapeutics Inc (RNA)
Institutional ownership reported to the SEC as of Q2 2026, across 3 quarters.
156
Reporting holders
$224.7M
Reported value
92.1%
Of shares outstanding
0.4%
Calls
5.3%
Puts
-5
Holder change
Institutions report 15,751,559 shares against 17,105,643 outstanding. Shares only - option lines are excluded, which is why this can be compared with the company at all. The count comes from the cover page of the company's own most recent report, so it is dated when that was filed rather than at quarter end. A figure this high can overstate: where an adviser and a sub-adviser both report the same shares, both are counted.
Calls and puts are the parts of reported value carried in derivative lines rather than shares, and they point in opposite directions: a manager holding calls is positioned for the security, one holding puts against it - or hedging shares they already own, which is why index funds carry so many. Most sites add the two together and report one figure, which averages away the only interesting part.
Holders
| Filer | Value | Shares | Their book | Held | Change |
|---|---|---|---|---|---|
| Sessa Capital IM, L.P. | $20.2M | 1,500,000 | 0.34% | 2q | +172.0%+$12.8M |
| PRICE T ROWE ASSOCIATES INC /MD/ | $19.8M | 1,472,984 | 0.00% | 2q | -5.2%-$1.1M |
| BlackRock, Inc. | $19.5M | 1,447,476 | 0.00% | 2q | +20.1%+$3.3M |
| CRCM LP | $17.3M | 1,283,078 | 5.68% | new | NEW |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | $11.3M PUT | options only | 0.00% | 2q | OPTIONS |
| Arbiter Partners Capital Management LLC | $10.5M | 783,864 | 1.83% | 2q | +240.8%+$7.4M |
| VANGUARD CAPITAL MANAGEMENT LLC | $9.8M | 730,831 | 0.00% | 2q | +16.6%+$1.4M |
| TIG Advisors, LLC | $7.6M | 561,533 | 0.33% | 2q | -7.6%-$619.0K |
| CANTOR FITZGERALD, L. P. | $6.9M | 513,834 | 0.04% | 2q | +118.1%+$3.7M |
| GEODE CAPITAL MANAGEMENT, LLC | $5.2M | 386,929 | 0.00% | 2q | +21.0%+$902.7K |
| TWO SIGMA INVESTMENTS, LP | $4.6M | 345,481 | 0.00% | 2q | +93.5%+$2.2M |
| GOLDMAN SACHS GROUP INC | $4.2M | 310,341 | 0.00% | 2q | -11.3%-$532.7K |
| 683 Capital Management, LLC | $4.0M | 300,000 | 0.20% | 2q | HELD |
| STATE STREET CORP | $3.7M | 271,762 | 0.00% | 2q | +5.7%+$197.4K |
| Slotnik Capital, LLC | $3.2M | 237,637 | 0.83% | 2q | +31.3%+$762.5K |
| Weiss Asset Management LP | $3.0M | 219,730 | 0.03% | 2q | -8.7%-$282.1K |
| MILLENNIUM MANAGEMENT LLC | $2.7M | 200,559 | 0.00% | 2q | +5.1%+$130.5K |
| Schonfeld Strategic Advisors LLC | $2.7M | 199,158 | 0.01% | 2q | +22.4%+$489.6K |
| AQR CAPITAL MANAGEMENT LLC | $2.3M | 172,235 | 0.00% | new | NEW |
| NEXPOINT ASSET MANAGEMENT, L.P. | $2.0M | 150,025 | 0.13% | 2q | HELD |
| Polar Asset Management Partners Inc. | $2.0M | 150,000 | 0.03% | 2q | +114.3%+$1.1M |
| Squarepoint Ops LLC | $2.0M | 146,743 | 0.00% | 2q | -36.6%-$1.1M |
| Bracebridge Capital, LLC | $1.9M | 139,239 | 0.03% | 2q | HELD |
| NOMURA HOLDINGS INC | $1.8M | 137,394 | 0.00% | 2q | HELD |
| Caption Management, LLC | $1.8M incl. $817.8K options CALL | 75,277 | 0.01% | 2q | -27.3%-$688.4K |
| Yakira Capital Management, Inc. | $1.8M | 133,047 | 0.51% | 2q | +5.1%+$86.1K |
| BANK OF AMERICA CORP /DE/ | $1.8M | 132,833 | 0.00% | 2q | -2.5%-$45.9K |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC | $1.8M | 130,217 | 0.00% | 2q | +11.7%+$183.2K |
| TUDOR INVESTMENT CORP ET AL | $1.7M | 129,591 | 0.00% | 2q | +81.6%+$783.2K |
| DAFNA Capital Management LLC | $1.7M | 128,000 | 0.33% | new | NEW |
| Creek Drive Management Group LLC | $1.7M | 127,600 | 0.83% | 2q | +6.3%+$102.2K |
| NORGES BANK | $1.7M | 126,575 | 0.00% | new | NEW |
| Anson Funds Management LP | $1.7M | 125,000 | 0.10% | new | NEW |
| NORTHERN TRUST CORP | $1.6M | 119,781 | 0.00% | 2q | +21.5%+$285.1K |
| ExodusPoint Capital Management, LP | $1.6M | 117,275 | 0.01% | 2q | +51.4%+$535.8K |
| Trium Capital LLP | $1.5M | 113,278 | 0.94% | new | NEW |
| TD Asset Management Inc | $1.5M | 111,200 | 0.00% | 2q | HELD |
| VANGUARD FIDUCIARY TRUST CO | $1.5M | 109,961 | 0.00% | 2q | +15.6%+$199.5K |
| JANE STREET GROUP, LLC | $1.5M | 109,810 | 0.00% | 2q | +450.3%+$1.2M |
| Athos Capital Ltd | $1.5M | 107,965 | 0.52% | 2q | HELD |
| AWM Investment Company, Inc. | $1.4M | 107,500 | 0.13% | 2q | +115.0%+$773.4K |
| Balyasny Asset Management L.P. | $1.4M | 105,875 | 0.00% | 2q | -55.0%-$1.7M |
| Marble Bar Asset Management LLP | $1.4M | 103,849 | 0.97% | 2q | -29.4%-$580.4K |
| VANGUARD PORTFOLIO MANAGEMENT LLC | $1.4M | 101,195 | 0.00% | 2q | -70.6%-$3.3M |
| ADAGE CAPITAL PARTNERS GP, L.L.C. | $1.3M | 100,000 | 0.00% | 2q | -45.5%-$1.1M |
| BlueCrest Capital Management Ltd | $1.3M | 100,000 | 0.04% | new | NEW |
| CREDIT INDUSTRIEL ET COMMERCIAL | $1.2M | 89,723 | 0.08% | 2q | +290.1%+$897.4K |
| Groupe la Francaise | $1.1M | 80,273 | 0.01% | 2q | +170.3%+$680.2K |
| FIL Ltd | $1.0M | 76,500 | 0.00% | 2q | -2.5%-$26.9K |
| CITADEL ADVISORS LLC | $909.7K | 67,639 | 0.00% | 2q | -38.5%-$568.9K |
| MANUFACTURERS LIFE INSURANCE COMPANY, THE | $845.4K | 62,853 | 0.00% | 2q | +0.8%+$6.4K |
| ADAR1 Capital Management, LLC | $775.9K | 57,688 | 0.04% | 2q | HELD |
| FRANKLIN RESOURCES INC | $762.6K | 56,699 | 0.00% | new | NEW |
| JACOBS LEVY EQUITY MANAGEMENT, INC | $726.2K | 53,992 | 0.00% | new | NEW |
| ODDO BHF ASSET MANAGEMENT SAS | $606.5K | 45,090 | 0.03% | 2q | HELD |
| CAXTON ASSOCIATES LLP | $594.9K | 44,230 | 0.01% | 2q | HELD |
| ALETHEA CAPITAL MANAGEMENT, LLC | $588.5K | 43,758 | 0.24% | 2q | HELD |
| CANADA PENSION PLAN INVESTMENT BOARD | $564.5K | 41,970 | 0.00% | 2q | HELD |
| MORGAN STANLEY | $564.1K | 41,942 | 0.00% | 2q | -74.6%-$1.7M |
| Saba Capital Management, L.P. | $533.2K | 39,640 | 0.01% | 2q | HELD |
| Bank of New York Mellon Corp | $527.9K | 39,252 | 0.00% | 2q | -10.2%-$59.8K |
| Y-Intercept (Hong Kong) Ltd | $472.1K | 35,103 | 0.01% | new | NEW |
| KENNEDY CAPITAL MANAGEMENT LLC | $470.5K | 34,979 | 0.01% | 2q | +2.9%+$13.5K |
| GROUP ONE TRADING LLC | $451.6K incl. $403.5K options CALL+PUT | 3,575 | 0.00% | 2q | -2.9%-$13.5K |
| FMR LLC | $451.0K | 33,532 | 0.00% | 2q | +14.5%+$57.0K |
| Moran Wealth Management, LLC | $448.2K | 33,320 | 0.01% | new | NEW |
| BOUSSARD & GAVAUDAN GESTION SAS | $447.2K | 32,845 | 0.02% | new | FIRST |
| LMR Partners LLP | $437.1K | 32,500 | 0.00% | 2q | HELD |
| LOS ANGELES CAPITAL MANAGEMENT LLC | $423.4K | 31,477 | 0.00% | new | NEW |
| Nuveen, LLC | $417.9K | 31,071 | 0.00% | 2q | +22.8%+$77.5K |
| Jump Financial, LLC | $417.2K | 31,017 | 0.00% | new | NEW |
| Walleye Trading LLC | $401.9K incl. $348.4K options CALL+PUT | 3,978 | 0.00% | 2q | +9.6%+$35.4K |
| Quantinno Capital Management LP | $368.8K | 27,418 | 0.00% | 2q | +120.2%+$201.3K |
| Twin Securities, Inc. | $356.7K | 26,517 | 0.16% | 2q | -46.9%-$314.7K |
| Odyssean, LLC | $285.6K | 21,233 | 0.05% | new | NEW |
| Brevan Howard Capital Management LP | $280.2K | 20,834 | 0.00% | 2q | -34.2%-$145.4K |
| Fractal Investments LLC | $269.0K | 20,000 | 0.03% | 2q | HELD |
| UBS Group AG | $263.2K | 19,572 | 0.00% | 2q | -60.7%-$406.8K |
| HEALTHCARE OF ONTARIO PENSION PLAN TRUST FUND | $250.0K | 18,590 | 0.00% | 2q | -9.7%-$26.9K |
| Vestcor Inc | $235.0K | 17,499 | 0.01% | 2q | HELD |
| WELLS FARGO & COMPANY/MN | $234.7K | 17,451 | 0.00% | 2q | +52.9%+$81.2K |
| ALLIANCEBERNSTEIN L.P. | $228.8K | 17,110 | 0.00% | 2q | +31.9%+$55.4K |
| RHUMBLINE ADVISERS | $223.0K | 16,579 | 0.00% | 2q | +10.9%+$21.9K |
| BLUEFIN CAPITAL MANAGEMENT, LLC | $215.3K | 16,011 | 0.05% | new | NEW |
| RENAISSANCE TECHNOLOGIES LLC | $201.4K | 14,971 | 0.00% | new | NEW |
| DEUTSCHE BANK AG\ | $201.3K | 14,967 | 0.00% | 2q | +49.4%+$66.6K |
| Invesco Ltd. | $190.6K | 14,174 | 0.00% | 2q | +39.1%+$53.5K |
| Jupiter Topco LLC | $185.6K | 13,833 | 0.00% | new | FIRST |
| AlphaCentric Advisors LLC | $181.3K | 13,478 | 0.15% | 2q | +1.4%+$2.6K |
| AXQ CAPITAL, LP | $153.0K | 11,377 | 0.02% | new | NEW |
| KESTRA PRIVATE WEALTH SERVICES, LLC | $139.5K | 10,370 | 0.00% | new | NEW |
| MetLife Investment Management, LLC | $138.3K | 10,283 | 0.00% | 2q | +16.3%+$19.3K |
| Corsicana & Co. | $132.1K | 9,820 | 0.06% | new | NEW |
| JPMORGAN CHASE & CO | $128.1K | 9,388 | 0.00% | 2q | -22.0%-$36.2K |
| BNP PARIBAS FINANCIAL MARKETS | $106.3K | 7,901 | 0.00% | 2q | -4.4%-$4.9K |
| CITIGROUP INC | $89.9K | 6,685 | 0.00% | 2q | +947.8%+$81.3K |
| MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd. | $88.8K | 6,602 | 0.00% | 2q | -30.4%-$38.8K |
| Vanguard Global Advisers, LLC | $75.1K | 5,585 | 0.00% | 2q | HELD |
| Russell Investments Group, Ltd. | $60.2K | 4,475 | 0.00% | 2q | +16.6%+$8.6K |
| Skandinaviska Enskilda Banken AB (publ) | $59.2K | 4,400 | 0.00% | new | NEW |
Showing the largest 100 of 156 reported holders.
What the company announced
Form 8-K filings from the last 120 days, showing only the items worth a reader's attention. Earnings releases, exhibit attachments and general disclosures are filed constantly and are left out. Filed is when the SEC received it; event is the date the company says the thing happened.
| Filed | Event date | What | Source |
|---|---|---|---|
| 2026-10-08 | 2026-10-07 | Material agreement entered | filing |
Quarter by quarter
Coverage begins with the quarter ending 2018-12-31. Earlier filings exist only as occasional late amendments, too sparse to describe a market, so they are not shown.
| Quarter | Holders | Value | Shares | New | Added | Trimmed | Options |
|---|---|---|---|---|---|---|---|
| Q3 2026 | 15 | $600.4K | 72,624 | 3 | 6 | 5 | 0.0% |
| Q2 2026 | 156 | $224.7M | 15,751,559 | 39 | 45 | 36 | 5.7% |
| Q1 2026 | 161 | $214.9M | 14,832,550 | 158 | 0 | 0 | 7.7% |