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.
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 |