Kalaris Therapeutics, Inc. - KLRS

Detailed investor-level table based on 13F positions.
Early Q1 2026 data: only 1 institutional holders reported so far. The full shareholder list will grow as more funds file with the SEC.

Shareholders (13F)

Quarter: Q4 2025 · Compare: Q3 2025
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
Samsara BioCapital, LLC History Added to 12,948,081 109,281 11.27% 8.64% 1 +1,500,000 13.1% Q4 2025 Feb 17, 2026
RTW INVESTMENTS, LP History New 1,300,000 10,972 0.11% 2 +1,300,000 New Q4 2025 Feb 17, 2026
Paradigm Biocapital Advisors LP History New 700,000 5,908 0.15% 3 +700,000 New Q4 2025 Feb 17, 2026
Siren, L.L.C. History Added to 435,798 3,678 0.11% 0.07% 4 +117,534 36.93% Q4 2025 Feb 13, 2026
Alyeska Investment Group, L.P. History New 403,551 3,402 0.01% 5 +403,551 New Q4 2025 Feb 13, 2026
Ikarian Capital, LLC History New 360,000 3,038 0.24% 6 +360,000 New Q4 2025 Feb 18, 2026
VANGUARD GROUP INC History Added to 292,790 2,471 0.0% 0.0% 7 +89,739 44.2% Q4 2025 Jan 29, 2026
Kalehua Capital Management LLC History New 139,901 1,180 1.17% 8 +139,901 New Q4 2025 Feb 13, 2026
Woodline Partners LP History Reduced 100,000 844 0.0% 0.01% 9 -141,102 -58.52% Q4 2025 Feb 17, 2026
ADAR1 Capital Management, LLC History New 100,000 844 0.06% 10 +100,000 New Q4 2025 Feb 18, 2026
WHI TRUST Co LLC History New 97,493 822 0.63% 11 +97,493 New Q4 2025 Feb 05, 2026
BOOTHBAY FUND MANAGEMENT, LLC History New 92,261 778 0.01% 12 +92,261 New Q4 2025 Feb 17, 2026
RAYMOND JAMES FINANCIAL INC History New 88,436 746 0.0% 13 +88,436 New Q4 2025 Feb 18, 2026
RENAISSANCE TECHNOLOGIES LLC History Reduced 87,751 740 0.0% 0.0% 14 -25,000 -22.17% Q4 2025 Feb 12, 2026
Redmile Group, LLC History No change 82,955 700 0.05% 0.05% 15 0 0.0% Q4 2025 Feb 17, 2026
GEODE CAPITAL MANAGEMENT, LLC History Added to 82,647 697 0.0% 0.0% 16 +18,096 28.03% Q4 2025 Feb 09, 2026
683 Capital Management, LLC History New 80,590 680 0.03% 17 +80,590 New Q4 2025 Feb 17, 2026
MARSHALL WACE, LLP History Added to 72,876 615 0.0% 0.0% 18 +58,761 416.3% Q4 2025 Feb 13, 2026
Propel Bio Management, LLC History New 42,053 354 0.3% 19 +42,053 New Q4 2025 Feb 11, 2026
Belpointe Asset Management LLC History No change 40,000 337 0.01% 0.01% 20 0 0.0% Q4 2025 Jan 27, 2026
Fortis Capital Advisors, LLC History No change 40,000 337 0.05% 0.04% 21 0 0.0% Q4 2025 Jan 27, 2026
BlackRock, Inc. History Reduced 38,454 324 0.0% 0.0% 22 -1,925 -4.77% Q4 2025 Feb 12, 2026
GOLDMAN SACHS GROUP INC History Added to 34,303 289 0.0% 0.0% 23 +11,838 52.7% Q4 2025 Mar 25, 2026
JANE STREET GROUP, LLC History New 33,114 279 0.0% 24 +33,114 New Q4 2025 Feb 12, 2026
OMERS ADMINISTRATION Corp History New 30,000 253 0.0% 25 +30,000 New Q4 2025 Feb 13, 2026
MORGAN STANLEY History Added to 27,948 235 0.0% 0.0% 26 +3,030 12.16% Q4 2025 Feb 13, 2026
TWO SIGMA INVESTMENTS, LP History New 27,759 234 0.0% 27 +27,759 New Q4 2025 Feb 17, 2026
Squarepoint Ops LLC History Reduced 25,367 214 0.0% 0.0% 29 -14,806 -36.86% Q4 2025 Feb 13, 2026
STATE STREET CORP History Added to 25,410 214 0.0% 0.0% 28 +2,800 12.38% Q4 2025 Feb 13, 2026
BRIDGEWAY CAPITAL MANAGEMENT, LLC History No change 22,500 189 0.0% 0.0% 30 0 0.0% Q4 2025 Feb 17, 2026
Simplify Asset Management Inc. History New 20,074 169 0.0% 31 +20,074 New Q4 2025 Feb 09, 2026
RBF Capital, LLC History No change 17,391 146 0.01% 0.0% 32 0 0.0% Q4 2025 Feb 17, 2026
NORTHERN TRUST CORP History New 13,654 115 0.0% 33 +13,654 New Q4 2025 Feb 17, 2026
SUSQUEHANNA INTERNATIONAL GROUP, LLP History New 12,856 108 0.0% 34 +12,856 New Q4 2025 Feb 17, 2026
Walleye Capital LLC History New 11,225 94 0.0% 35 +11,225 New Q4 2025 Feb 13, 2026
XTX Topco Ltd History New 10,897 91 0.0% 36 +10,897 New Q4 2025 Feb 17, 2026
Keel Point, LLC History New 10,225 86 0.01% 37 +10,225 New Q4 2025 Feb 12, 2026
Connor, Clark & Lunn Investment Management Ltd. History New 10,159 85 0.0% 38 +10,159 New Q4 2025 Feb 10, 2026
Johnson Financial Group, Inc. History No change 10,000 84 0.0% 0.0% 39 0 0.0% Q4 2025 Feb 12, 2026
FMR LLC History No change 7,806 65 0.0% 0.0% 40 0 0.0% Q4 2025 Feb 17, 2026
BANK OF AMERICA CORP /DE/ History Added to 6,704 56 0.0% 0.0% 41 +6,487 2989.4% Q4 2025 Feb 17, 2026
BARCLAYS PLC History New 6,065 51 0.0% 42 +6,065 New Q4 2025 Feb 13, 2026
NANO CAP NEW MILLENNIUM GROWTH FUND L P History New 4,000 33 0.03% 43 +4,000 New Q4 2025 Feb 06, 2026
UBS Group AG History Reduced 2,691 22 0.0% 0.0% 44 -2,561 -48.76% Q4 2025 Jan 29, 2026
ROYAL BANK OF CANADA History New 113 1 0.0% 45 +113 New Q4 2025 Feb 17, 2026
TANG CAPITAL MANAGEMENT LLC History Closed out 0 0 0.09% -418,241 -100.0% Q3 2025 Nov 14, 2025
MILLENNIUM MANAGEMENT LLC History Closed out 0 0 0.0% -24,923 -100.0% Q3 2025 Nov 14, 2025
FEDERATED HERMES, INC. History Closed out 0 0 0.0% -578 -100.0% Q3 2025 Nov 03, 2025
Strengthening Families & Communities, LLC History Closed out 0 0 0.0% -268 -100.0% Q3 2025 Nov 04, 2025
Fortitude Family Office, LLC History New 114 0 +114 New Q4 2025 Jan 15, 2026
BNP PARIBAS FINANCIAL MARKETS History Reduced 52 0 -89 -63.12% Q4 2025 Feb 10, 2026
Farther Finance Advisors, LLC History Closed out 0 0 -33 -100.0% Q3 2025 Oct 14, 2025
SBI Securities Co., Ltd. History Reduced 5 0 -3 -37.5% Q4 2025 Feb 03, 2026
JPMORGAN CHASE & CO History No change 50 0 0 0.0% Q4 2025 Feb 11, 2026
CITIGROUP INC History No change 1 0 0 0.0% Q4 2025 Feb 13, 2026
Parallel Advisors, LLC History No change 49 0 0 0.0% Q4 2025 Feb 11, 2026