Kalaris TherapeuticsKLRS
13F holders, Q2 2026 (June 30)56holders −2
9new positions
11sold out
2famous investors
$4.07avg. 13F price*
At the end of Q2 2026, 56 institutions reported holding Kalaris Therapeutics Inc. (KLRS) in their 13F filings, down 2 from Q1 2026. 9 opened new positions and 11 sold out. The largest holders were Samsara Biocapital, LLC ($52.4M), RTW Investments, LP ($5.3M) and Alyeska Investment Group, L.P. ($2.3M). 2 famous investors held it, including Jim Simons / Peter Brown (0.0% of Renaissance Technologies's portfolio) and Ken Griffin (0.0% of Citadel Advisors's portfolio).
- Company
- Kalaris Therapeutics Inc.
- CUSIP
- 482929106
- Latest filing quarter
- Q2 2026
History
Number of 13F holders
Total Exit/New Position Q1 2026 → Q2 2026
| Institutions | Total Value | |
|---|---|---|
| New Positions | 9 | $1.2M |
| Exits | 11 | $7.8M |
All 13F filers, Q1 2026 → Q2 2026: 1,040,490 shares bought and 1,588,280 shares sold, net −547,790 shares. Counts holders who added, trimmed, opened or closed a position; split-adjusted.
Ownership 56 holders
| Samsara Biocapital, LLC | 4.31% | Reduce -0.5% | 12,881,175 | $52.4M |
| RTW Investments, LP | 0.05% | No change | 1,300,000 | $5.3M |
| Alyeska Investment Group, L.P. | 0.01% | No change | 572,687 | $2.3M |
| Siren, L.L.C. | 0.04% | No change | 435,798 | $1.8M |
| Vanguard Capital Management LLC | 0.00% | Add +56.1% | 398,712 | $1.6M |
| Ikarian Capital, LLC | 0.24% | No change | 360,000 | $1.5M |
| UBS Group AG | 0.00% | Add +4138.9% | 262,131 | $1.1M |
| Renaissance Technologies | 0.00% | Add +125.8% | 149,351 | $608K |
| Marshall Wace, LLP | 0.00% | Add +105.1% | 139,201 | $567K |
| Geode Capital Management, LLC | 0.00% | Add +30.3% | 114,037 | $464K |
| ADAR1 Capital Management, LLC | 0.02% | No change | 100,000 | $407K |
| Woodline Partners LP | 0.00% | No change | 100,000 | $407K |
| WHI TRUST Co LLC | 0.26% | No change | 97,493 | $397K |
| Raymond James Financial Inc. | 0.00% | Reduce -18.3% | 97,164 | $395K |
| Citadel Advisors | 0.00% | New | 95,772 | $390K |
| Boothbay Fund Management, LLC | 0.01% | No change | 92,261 | $376K |
| Verdad Advisers, LP | 0.31% | New | 80,297 | $327K |
| Morgan Stanley | 0.00% | Add +88.6% | 72,326 | $294K |
| Vanguard Fiduciary Trust Co. | 0.00% | Add +80.2% | 66,179 | $269K |
| BlackRock, Inc. | 0.00% | Add +51.0% | 54,442 | $222K |
| Fortis Capital Advisors, LLC | 0.02% | No change | 40,000 | $163K |
| Belpointe Asset Management LLC | 0.01% | No change | 40,000 | $163K |
| Pale Fire Capital SE | 0.01% | New | 39,626 | $161K |
| Squarepoint Ops LLC | 0.00% | Reduce -2.5% | 38,775 | $158K |
| Bridgeway Capital Management, LLC | 0.00% | Add +44.4% | 32,500 | $132K |
| Stonepine Capital Management, LLC | 0.09% | Add +47.7% | 30,122 | $123K |
| Connor, Clark & Lunn Investment Management Ltd. | 0.00% | Add +119.8% | 30,007 | $122K |
| Trexquant Investment LP | 0.00% | New | 29,737 | $121K |
| State Street Corp. | 0.00% | No change | 26,510 | $108K |
| Northern Trust Corp. | 0.00% | Add +78.8% | 25,839 | $105K |
| Velan Capital Investment Management LP | 0.06% | Add +38.9% | 25,000 | $102K |
| Two Sigma Investments, LP | 0.00% | Reduce -22.2% | 23,847 | $97K |
| WealthTrust Asset Management, LLC | 0.04% | Add +64.4% | 20,416 | $83K |
| Independent Advisor Alliance | 0.00% | Add +27.4% | 18,125 | $74K |
| RBF Capital, LLC | 0.00% | No change | 17,391 | $71K |
| Quadrature Capital Ltd | 0.00% | New | 16,527 | $67K |
| Goldman Sachs Group Inc. | 0.00% | Reduce -85.5% | 16,054 | $65K |
| Dimensional Fund Advisors LP | 0.00% | New | 15,958 | $65K |
| Susquehanna International Group, LLP | 0.00% | Reduce -73.0% | 14,221 | $58K |
| HRT Financial LP | 0.00% | Add +18.1% | 13,723 | $55K |
| Nano Cap New Millennium Growth Fund L P | 0.04% | Add +212.5% | 12,500 | $51K |
| Virtu Financial LLC | 0.00% | New | 10,845 | $44K |
| Sigma Planning Corp | 0.00% | New | 10,167 | $41K |
| FMR LLC | 0.00% | No change | 7,806 | $32K |
| Tower Research Capital LLC (TRC) | 0.00% | Add +1741.7% | 2,560 | $10K |
| Steward Partners Investment Advisory, LLC | 0.00% | No change | 2,215 | $9K |
| Vanguard Global Advisers, LLC | 0.00% | No change | 725 | $3K |
| Barclays PLC | 0.00% | Reduce -94.3% | 303 | $1K |
| Strengthening Families & Communities, LLC | 0.00% | No change | 268 | $1K |
| BNP Paribas Financial Markets | 0.00% | Reduce -92.0% | 52 | $212 |
| JPMorgan Chase & Co. | 0.00% | No change | 50 | $211 |
| Parallel Advisors, LLC | 0.00% | No change | 49 | $199 |
| Harbour Investments, Inc. | 0.00% | No change | 13 | $53 |
| Caitong International Asset Management Co., Ltd | 0.00% | New | 7 | $28 |
| SBI Securities Co., Ltd. | 0.00% | No change | 5 | $20 |
| Royal Bank of Canada | 0.00% | Reduce -88.3% | 12 | $0 |
"% of holder's portfolio" is KLRS's weight in each manager's 13F, not the share of Kalaris Therapeutics Inc. the manager owns.