Atrium Therapeutics, Inc. - RNA

Detailed investor-level table based on 13F positions.

Shareholders (13F)

Quarter: Q1 2026
13D/13G major owners: Ownership tab.
Methodology: Market value and % of portfolio use SEC reported VALUE ($000). For PUT/CALL positions this reflects reported underlying exposure, not premium cash paid/received. Details.
Rows: 0
Investor History Status Shares held Market value ($000) % of portfolio Previous % Rank Change in shares % change in shares Source Date reported
PRICE T ROWE ASSOCIATES INC /MD/ History New 1,553,210 20,767 0.0% 1 +1,553,210 New Q1 2026 May 15, 2026
BlackRock, Inc. History New 1,205,291 16,114 0.0% 2 +1,205,291 New Q1 2026 May 13, 2026
SUSQUEHANNA INTERNATIONAL GROUP, LLP History New 1,030,143 13,773 0.0% 3 +1,030,143 New Q1 2026 May 15, 2026
RA CAPITAL MANAGEMENT, L.P. History New 864,102 11,553 0.12% 4 +864,102 New Q1 2026 May 15, 2026
VANGUARD CAPITAL MANAGEMENT LLC History New 626,869 8,381 0.0% 5 +626,869 New Q1 2026 May 15, 2026
TIG Advisors, LLC History New 607,552 8,122 0.38% 6 +607,552 New Q1 2026 May 15, 2026
Pentwater Capital Management LP History New 602,649 8,057 0.04% 7 +602,649 New Q1 2026 May 15, 2026
O'Connor Alternative Investments LLC History New 578,011 7,728 0.66% 8 +578,011 New Q1 2026 May 15, 2026
Sessa Capital IM, L.P. History New 551,391 7,372 0.13% 9 +551,391 New Q1 2026 May 15, 2026
GOLDMAN SACHS GROUP INC History New 349,950 4,678 0.0% 10 +349,950 New Q1 2026 May 15, 2026
FARALLON CAPITAL MANAGEMENT LLC History New 349,360 4,670 0.03% 11 +349,360 New Q1 2026 May 15, 2026
VANGUARD PORTFOLIO MANAGEMENT LLC History New 344,369 4,604 0.0% 12 +344,369 New Q1 2026 May 08, 2026
GEODE CAPITAL MANAGEMENT, LLC History New 319,831 4,277 0.0% 13 +319,831 New Q1 2026 May 15, 2026
683 Capital Management, LLC History New 300,000 4,011 0.21% 14 +300,000 New Q1 2026 May 15, 2026
Bellevue Group AG History New 263,096 3,517 0.08% 15 +263,096 New Q1 2026 May 14, 2026
STATE STREET CORP History New 257,086 3,437 0.0% 16 +257,086 New Q1 2026 May 15, 2026
Weiss Asset Management LP History New 240,701 3,218 0.05% 17 +240,701 New Q1 2026 May 15, 2026
CANTOR FITZGERALD, L. P. History New 235,637 3,150 0.05% 18 +235,637 New Q1 2026 May 15, 2026
BALYASNY ASSET MANAGEMENT L.P. History New 235,115 3,143 0.0% 19 +235,115 New Q1 2026 May 15, 2026
Squarepoint Ops LLC History New 231,466 3,094 0.0% 20 +231,466 New Q1 2026 May 15, 2026
Arbiter Partners Capital Management LLC History New 230,000 3,075 1.76% 21 +230,000 New Q1 2026 May 12, 2026
Caption Management, LLC History New 204,392 2,732 0.02% 22 +204,392 New Q1 2026 May 15, 2026
MILLENNIUM MANAGEMENT LLC History New 190,859 2,551 0.0% 23 +190,859 New Q1 2026 May 15, 2026
ADAGE CAPITAL PARTNERS GP, L.L.C. History New 183,580 2,454 0.0% 24 +183,580 New Q1 2026 May 15, 2026
Slotnik Capital, LLC History New 180,945 2,419 0.71% 25 +180,945 New Q1 2026 May 15, 2026
AQR Arbitrage LLC History New 179,713 2,402 0.04% 26 +179,713 New Q1 2026 May 15, 2026
TWO SIGMA INVESTMENTS, LP History New 178,560 2,387 0.0% 27 +178,560 New Q1 2026 May 15, 2026
MORGAN STANLEY History New 165,036 2,206 0.0% 28 +165,036 New Q1 2026 May 15, 2026
Schonfeld Strategic Advisors LLC History New 162,759 2,176 0.02% 29 +162,759 New Q1 2026 May 15, 2026
NEXPOINT ASSET MANAGEMENT, L.P. History New 150,025 2,005 0.13% 30 +150,025 New Q1 2026 May 15, 2026
Marble Bar Asset Management LLP History New 147,000 1,965 1.93% 31 +147,000 New Q1 2026 May 14, 2026
JANUS HENDERSON GROUP PLC History New 139,973 1,871 0.0% 32 +139,973 New Q1 2026 May 18, 2026
Bracebridge Capital, LLC History New 139,239 1,861 0.05% 33 +139,239 New Q1 2026 May 15, 2026
NOMURA HOLDINGS INC History New 137,380 1,836 0.0% 34 +137,380 New Q1 2026 May 15, 2026
BANK OF AMERICA CORP /DE/ History New 136,248 1,821 0.0% 35 +136,248 New Q1 2026 May 15, 2026
Yakira Capital Management, Inc. History New 126,645 1,693 0.5% 36 +126,645 New Q1 2026 May 14, 2026
Creek Drive Management Group LLC History New 120,000 1,604 0.37% 37 +120,000 New Q1 2026 May 15, 2026
CHARLES SCHWAB INVESTMENT MANAGEMENT INC History New 116,598 1,558 0.0% 38 +116,598 New Q1 2026 May 15, 2026
TD ASSET MANAGEMENT INC History New 111,200 1,486 0.0% 39 +111,200 New Q1 2026 May 11, 2026
CITADEL ADVISORS LLC History New 109,936 1,469 0.0% 40 +109,936 New Q1 2026 May 15, 2026
Athos Capital Ltd History New 107,965 1,443 0.44% 41 +107,965 New Q1 2026 May 12, 2026
NORTHERN TRUST CORP History New 98,585 1,318 0.0% 42 +98,585 New Q1 2026 May 14, 2026
VANGUARD FIDUCIARY TRUST CO History New 95,128 1,271 0.0% 43 +95,128 New Q1 2026 May 08, 2026
FIL Ltd History New 78,500 1,049 0.0% 44 +78,500 New Q1 2026 May 15, 2026
TUDOR INVESTMENT CORP ET AL History New 71,359 954 0.0% 45 +71,359 New Q1 2026 May 15, 2026
Polar Asset Management Partners Inc. History New 70,000 935 0.02% 46 +70,000 New Q1 2026 May 15, 2026
Neuberger Berman Group LLC History New 69,294 926 0.0% 47 +69,294 New Q1 2026 May 14, 2026
Quarry LP History New 66,651 891 0.16% 48 +66,651 New Q1 2026 May 15, 2026
MANUFACTURERS LIFE INSURANCE COMPANY, THE History New 62,379 834 0.0% 49 +62,379 New Q1 2026 May 15, 2026
ADAR1 Capital Management, LLC History New 57,688 771 0.05% 50 +57,688 New Q1 2026 May 15, 2026
Centiva Capital, LP History New 55,895 747 0.01% 51 +55,895 New Q1 2026 May 14, 2026
Westchester Capital Management, LLC History New 55,236 738 0.03% 52 +55,236 New Q1 2026 May 15, 2026
AWM Investment Company, Inc. History New 50,000 668 0.07% 53 +50,000 New Q1 2026 May 15, 2026
Twin Securities, Inc. History New 49,913 667 0.32% 54 +49,913 New Q1 2026 May 15, 2026
UBS Group AG History New 49,814 666 0.0% 55 +49,814 New Q1 2026 May 05, 2026
ODDO BHF ASSET MANAGEMENT SAS History New 45,090 602 0.02% 56 +45,090 New Q1 2026 May 18, 2026
CAXTON ASSOCIATES LLP History New 44,230 591 0.01% 57 +44,230 New Q1 2026 May 14, 2026
ALETHEA CAPITAL MANAGEMENT, LLC History New 43,758 585 0.3% 58 +43,758 New Q1 2026 May 13, 2026
Bank of New York Mellon Corp History New 43,697 584 0.0% 59 +43,697 New Q1 2026 May 05, 2026
CANADA PENSION PLAN INVESTMENT BOARD History New 41,970 561 0.0% 60 +41,970 New Q1 2026 May 15, 2026
HIGHBRIDGE CAPITAL MANAGEMENT LLC History New 40,986 555 0.02% 61 +40,986 New Q1 2026 May 15, 2026
Saba Capital Management, L.P. History New 39,640 529 0.01% 62 +39,640 New Q1 2026 May 15, 2026
FIFTH LANE CAPITAL, LP History New 35,999 481 0.58% 63 +35,999 New Q1 2026 May 15, 2026
ROYAL BANK OF CANADA History New 35,698 477 0.0% 64 +35,698 New Q1 2026 May 15, 2026
KENNEDY CAPITAL MANAGEMENT LLC History New 33,977 454 0.01% 65 +33,977 New Q1 2026 May 13, 2026
MARSHALL WACE, LLP History New 33,691 450 0.0% 66 +33,691 New Q1 2026 May 14, 2026
LMR Partners LLP History New 32,500 434 0.0% 67 +32,500 New Q1 2026 May 15, 2026
Brevan Howard Capital Management LP History New 31,644 423 0.0% 68 +31,644 New Q1 2026 May 15, 2026
Walleye Trading LLC History New 30,428 406 0.0% 69 +30,428 New Q1 2026 May 08, 2026
Groupe la Francaise History New 29,698 397 0.01% 70 +29,698 New Q1 2026 May 21, 2026
FMR LLC History New 29,292 391 0.0% 71 +29,292 New Q1 2026 May 15, 2026
Woodline Partners LP History New 28,845 385 0.0% 72 +28,845 New Q1 2026 May 15, 2026
Nuveen, LLC History New 25,307 338 0.0% 73 +25,307 New Q1 2026 Apr 30, 2026
Cannon Global Investment Management, LLC History New 25,087 335 0.65% 74 +25,087 New Q1 2026 Apr 21, 2026
CREDIT INDUSTRIEL ET COMMERCIAL History New 23,000 307 0.02% 75 +23,000 New Q1 2026 Apr 29, 2026
Point72 Asset Management, L.P. History New 22,708 303 0.0% 76 +22,708 New Q1 2026 May 15, 2026
Fortress Investment Group LLC History New 22,033 294 0.07% 77 +22,033 New Q1 2026 May 15, 2026
HEALTHCARE OF ONTARIO PENSION PLAN TRUST FUND History New 20,590 275 0.0% 78 +20,590 New Q1 2026 May 14, 2026
Fractal Investments LLC History New 20,000 267 0.03% 79 +20,000 New Q1 2026 Apr 13, 2026
JANE STREET GROUP, LLC History New 19,955 266 0.0% 80 +19,955 New Q1 2026 May 12, 2026
Vestcor Inc History New 17,499 234 0.01% 81 +17,499 New Q1 2026 May 12, 2026
Grantham, Mayo, Van Otterloo & Co. LLC History New 15,444 206 0.0% 82 +15,444 New Q1 2026 May 14, 2026
RHUMBLINE ADVISERS History New 14,953 199 0.0% 83 +14,953 New Q1 2026 May 12, 2026
AlphaCentric Advisors LLC History New 13,286 177 0.18% 84 +13,286 New Q1 2026 May 07, 2026
Susquehanna Portfolio Strategies, LLC History New 13,110 175 0.0% 85 +13,110 New Q1 2026 May 15, 2026
ALLIANCEBERNSTEIN L.P. History New 12,970 173 0.0% 86 +12,970 New Q1 2026 May 15, 2026
PUBLIC SECTOR PENSION INVESTMENT BOARD History New 12,882 172 0.0% 87 +12,882 New Q1 2026 May 13, 2026
Quantinno Capital Management LP History New 12,454 166 0.0% 88 +12,454 New Q1 2026 May 15, 2026
JPMORGAN CHASE & CO History New 12,038 163 0.0% 89 +12,038 New Q1 2026 May 13, 2026
WELLS FARGO & COMPANY/MN History New 11,416 152 0.0% 90 +11,416 New Q1 2026 May 11, 2026
Magnetar Financial LLC History New 10,512 140 0.0% 91 +10,512 New Q1 2026 May 13, 2026
Invesco Ltd. History New 10,193 136 0.0% 92 +10,193 New Q1 2026 May 12, 2026
DEUTSCHE BANK AG\ History New 10,019 133 0.0% 93 +10,019 New Q1 2026 May 06, 2026
MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd. History New 9,488 126 0.0% 94 +9,488 New Q1 2026 May 15, 2026
MetLife Investment Management, LLC History New 8,845 118 0.0% 95 +8,845 New Q1 2026 May 14, 2026
BNP PARIBAS FINANCIAL MARKETS History New 8,267 110 0.0% 96 +8,267 New Q1 2026 May 12, 2026
Legal & General Group Plc History New 5,657 75 0.0% 97 +5,657 New Q1 2026 May 08, 2026
Vanguard Global Advisers, LLC History New 5,585 74 0.0% 98 +5,585 New Q1 2026 May 08, 2026
Russell Investments Group, Ltd. History New 3,839 51 0.0% 99 +3,839 New Q1 2026 May 08, 2026
GROUP ONE TRADING LLC History New 3,682 49 0.0% 100 +3,682 New Q1 2026 May 13, 2026
Erste Asset Management GmbH History New 3,600 48 0.0% 101 +3,600 New Q1 2026 May 11, 2026
Police & Firemen's Retirement System of New Jersey History New 3,175 42 0.0% 102 +3,175 New Q1 2026 Apr 29, 2026
Tower Research Capital LLC (TRC) History New 2,760 36 0.0% 104 +2,760 New Q1 2026 May 15, 2026
NEW YORK STATE COMMON RETIREMENT FUND History New 2,749 36 0.0% 103 +2,749 New Q1 2026 May 06, 2026
STRS OHIO History New 2,600 34 0.0% 105 +2,600 New Q1 2026 Apr 24, 2026
DIADEMA PARTNERS LP History New 2,512 33 0.01% 106 +2,512 New Q1 2026 May 15, 2026
BARCLAYS PLC History New 2,095 27 0.0% 107 +2,095 New Q1 2026 May 14, 2026
MAI Capital Management History New 1,293 17 0.0% 108 +1,293 New Q1 2026 May 15, 2026
NATIXIS History New 1,292 17 0.0% 109 +1,292 New Q1 2026 May 14, 2026
Ameritas Investment Partners, Inc. History New 950 12 0.0% 111 +950 New Q1 2026 May 13, 2026
PNC FINANCIAL SERVICES GROUP, INC. History New 943 12 0.0% 110 +943 New Q1 2026 May 08, 2026
Federation des caisses Desjardins du Quebec History New 810 10 0.0% 114 +810 New Q1 2026 May 13, 2026
Mint Tower Capital Management B.V. History New 781 10 0.0% 113 +781 New Q1 2026 May 04, 2026
PUBLIC EMPLOYEES RETIREMENT ASSOCIATION OF COLORADO History New 780 10 0.0% 112 +780 New Q1 2026 May 14, 2026
CITIGROUP INC History New 638 8 0.0% 115 +638 New Q1 2026 May 11, 2026
Steward Partners Investment Advisory, LLC History New 635 8 0.0% 117 +635 New Q1 2026 May 08, 2026
UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC History New 612 8 0.0% 116 +612 New Q1 2026 May 13, 2026
PenderFund Capital Management Ltd. History New 490 6 0.0% 119 +490 New Q1 2026 May 15, 2026
VAN ECK ASSOCIATES CORP History New 472 6 0.0% 118 +472 New Q1 2026 May 15, 2026
NISA INVESTMENT ADVISORS, LLC History New 384 5 0.0% 120 +384 New Q1 2026 Apr 30, 2026
KBC Group NV History New 337 5 0.0% 121 +337 New Q1 2026 May 07, 2026
Basecamp Wealth Advisors LLC History New 349 4 0.0% 125 +349 New Q1 2026 Jun 24, 2026
GAMMA Investing LLC History New 335 4 0.0% 124 +335 New Q1 2026 Apr 06, 2026
Mitsubishi UFJ Asset Management Co., Ltd. History New 331 4 0.0% 122 +331 New Q1 2026 May 12, 2026
QUADRANT CAPITAL GROUP LLC History New 316 4 0.0% 123 +316 New Q1 2026 May 13, 2026
US BANCORP \DE\ History New 297 3 0.0% 126 +297 New Q1 2026 May 14, 2026
Eurizon Capital SGR S.p.A. History New 287 3 0.0% 128 +287 New Q1 2026 May 08, 2026
Persistent Asset Partners Ltd History New 283 3 0.0% 127 +283 New Q1 2026 May 12, 2026
FNY Investment Advisers, LLC History New 152 1 0.0% 136 +152 New Q1 2026 Apr 15, 2026
Rockefeller Capital Management L.P. History New 142 1 0.0% 135 +142 New Q1 2026 May 14, 2026
AdvisorNet Financial, Inc History New 139 1 0.0% 131 +139 New Q1 2026 Apr 17, 2026
NewEdge Advisors, LLC History New 123 1 0.0% 133 +123 New Q1 2026 Jun 02, 2026
Westside Investment Management, Inc. History New 120 1 0.0% 132 +120 New Q1 2026 May 04, 2026
LONGFELLOW INVESTMENT MANAGEMENT CO LLC History New 107 1 0.0% 129 +107 New Q1 2026 May 12, 2026
Sterling Capital Management LLC History New 100 1 0.0% 130 +100 New Q1 2026 Apr 22, 2026
Parallel Advisors, LLC History New 76 1 0.0% 134 +76 New Q1 2026 Jun 02, 2026
GLAZER CAPITAL, LLC History New 2,634 0 +2,634 New Q1 2026 May 14, 2026
FIFTH THIRD BANCORP History New 59 0 +59 New Q1 2026 May 01, 2026
OSAIC HOLDINGS, INC. History New 58 0 +58 New Q1 2026 May 15, 2026
Allworth Financial LP History New 54 0 +54 New Q1 2026 May 14, 2026
Zurcher Kantonalbank (Zurich Cantonalbank) History New 49 0 +49 New Q1 2026 May 15, 2026
ASSETMARK, INC History New 34 0 +34 New Q1 2026 May 06, 2026
Pinnacle Wealth Planning Services, Inc. History New 34 0 +34 New Q1 2026 May 11, 2026
JONES FINANCIAL COMPANIES LLLP History New 29 0 +29 New Q1 2026 May 15, 2026
Smartleaf Asset Management LLC History New 25 0 +25 New Q1 2026 May 15, 2026
DANSKE BANK A/S History New 21 0 +21 New Q1 2026 May 12, 2026
CWM, LLC History New 21 0 +21 New Q1 2026 May 14, 2026
ROTHSCHILD INVESTMENT LLC History New 19 0 +19 New Q1 2026 May 07, 2026
Covestor Ltd History New 13 0 +13 New Q1 2026 May 05, 2026
Advisory Services Network, LLC History New 12 0 +12 New Q1 2026 May 15, 2026
BESSEMER GROUP INC History New 9 0 +9 New Q1 2026 May 06, 2026
Centerpoint Advisors, LLC History New 5 0 +5 New Q1 2026 May 07, 2026
NORTHWESTERN MUTUAL WEALTH MANAGEMENT CO History New 4 0 +4 New Q1 2026 May 07, 2026
EverSource Wealth Advisors, LLC History New 4 0 +4 New Q1 2026 May 15, 2026
Torren Management, LLC History New 4 0 +4 New Q1 2026 Apr 30, 2026
Keating Financial Advisory Services, Inc. History New 3 0 +3 New Q1 2026 May 15, 2026
MassMutual Private Wealth & Trust, FSB History New 2 0 +2 New Q1 2026 Apr 13, 2026
Bell Investment Advisors, Inc History New 2 0 +2 New Q1 2026 Apr 17, 2026
Truvestments Capital LLC History New 1 0 +1 New Q1 2026 May 13, 2026
True Wealth Design, LLC History New 1 0 +1 New Q1 2026 Apr 13, 2026
Root Financial Partners, LLC History New 1 0 +1 New Q1 2026 Apr 24, 2026
Bare Financial Services, Inc History New 1 0 +1 New Q1 2026 May 14, 2026
Cornerstone Financial Management LLC History New 1 0 +1 New Q1 2026 May 08, 2026