Kalaris Therapeutics, Inc.
KLRS- Exchange
- Nasdaq
- Industry
- Biological Products, (No Diagnostic Substances)
- SEC CIK
- 0001754068
No open-market purchases or sales by Kalaris Therapeutics, Inc. insiders were filed in the last 90 days; 56 institutions reported holding it in 13F filings for Q2 2026, worth $73.4M in total; no superinvestor holds it.
13F holders, Q1 2026
Institutional positions in Kalaris Therapeutics, Inc. as of Mar 31, 2026. Investment managers with $100 million or more in US stocks report their long positions on Form 13F within 45 days after each quarter ends. How 13F works
- Institutional holders
- 58
- +8 vs. Q4 2025
- Shares held
- 18.6M
- +875.4K (+4.9%) vs. Q4 2025
- Total value
- $107.2M
- −$42.2M (−28.3%) vs. Q4 2025
- New holders
- 15
- 16 more added
- Sold out
- 7
- 7 more reduced
1 institution that held it in Q4 2025 haven't filed for Q1 2026 yet. Not filing isn't selling, so they aren't counted as sold out or in the changes above.
Compare with Q4 2025: new holders, sold out and not filed yet
Holders and value by quarter
Institutions reporting KLRS on Form 13F each quarter since Q1 2021, and the total value they reported. Values are as of each quarter end, so they also move with the share price.
| Quarter | Holders | Value |
|---|---|---|
| Q2 2026 | 56 | $73.4M |
| Q1 2026 | 58 | $107.2M |
| Q4 2025 | 51 | $151.9M |
| Q3 2025 | 32 | $76.4M |
| Q2 2025 | 30 | $35.7M |
| Q1 2025 | 32 | $111.4M |
| Q4 2024 | 53 | $20.7M |
| Q3 2024 | 60 | $36.3M |
| Q2 2024 | 72 | $33.9M |
| Q1 2024 | 77 | $36.4M |
| Q4 2023 | 82 | $28.5M |
| Q3 2023 | 90 | $115.5M |
| Q2 2023 | 94 | $183.6M |
| Q1 2023 | 89 | $156.0M |
| Q4 2022 | 86 | $193.1M |
| Q3 2022 | 87 | $293.7M |
| Q2 2022 | 84 | $109.6M |
| Q1 2022 | 84 | $184.1M |
| Q4 2021 | 84 | $329.4M |
| Q3 2021 | 80 | $640.3M |
| Q2 2021 | 84 | $521.8M |
| Q1 2021 | 75 | $624.4M |
Institutions, Q1 2026
Shares, value and share of portfolio for each institution holding Kalaris Therapeutics, Inc.; share changes are against Q4 2025.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| Samsara BioCapital, LLC | 12,948,081 | $74.7M | 7.26% | 00.0% | Unchanged |
| RTW Investments, LP | 1,300,000 | $7.50M | 0.07% | 00.0% | Unchanged |
| Paradigm Biocapital Advisors LP | 700,000 | $4.04M | 0.08% | 00.0% | Unchanged |
| Alyeska Investment Group, L.P. | 572,687 | $3.27M | 0.01% | +169,136+41.9% | Added |
| Siren, L.L.C. | 435,798 | $2.51M | 0.07% | 00.0% | Unchanged |
| Ikarian Capital, LLC | 360,000 | $2.08M | 0.30% | 00.0% | Unchanged |
| Propel Bio Management, LLC | 295,771 | $1.72M | 1.08% | +253,718+603.3% | Added |
| Vanguard Capital Management LLC | 255,348 | $1.47M | 0.00% | +255,348 | New |
| Kalehua Capital Management LLC | 135,585 | $782.3K | 0.55% | −4,316−3.1% | Reduced |
| Raymond James Financial Inc | 118,887 | $686.0K | 0.00% | +30,451+34.4% | Added |
| Goldman Sachs Group Inc | 110,503 | $637.6K | 0.00% | +76,200+222.1% | Added |
| Woodline Partners LP | 100,000 | $577.0K | 0.00% | 00.0% | Unchanged |
| ADAR1 Capital Management, LLC | 100,000 | $577.0K | 0.03% | 00.0% | Unchanged |
| Whi Trust Co LLC | 97,493 | $562.5K | 0.42% | 00.0% | Unchanged |
| Boothbay Fund Management, LLC | 92,261 | $532.3K | 0.01% | 00.0% | Unchanged |
| Geode Capital Management, LLC | 87,545 | $505.3K | 0.00% | +4,898+5.9% | Added |
| Simplify Asset Management Inc. | 87,426 | $504.4K | 0.01% | +67,352+335.5% | Added |
| Marshall Wace, LLP | 67,879 | $391.7K | 0.00% | −4,997−6.9% | Reduced |
| Renaissance Technologies LLC | 66,151 | $381.7K | 0.00% | −21,600−24.6% | Reduced |
| Millennium Management LLC | 59,534 | $343.5K | 0.00% | +59,534 | New |
| Susquehanna International Group, LLP | 52,684 | $304.0K | 0.00% | +39,828+309.8% | Added |
| 683 Capital Management, LLC | 45,000 | $259.6K | 0.02% | −35,590−44.2% | Reduced |
| Belpointe Asset Management LLC | 40,000 | $230.8K | 0.01% | 00.0% | Unchanged |
| Fortis Capital Advisors, LLC | 40,000 | $230.8K | 0.03% | 00.0% | Unchanged |
| Squarepoint Ops LLC | 39,773 | $229.5K | 0.00% | +14,406+56.8% | Added |
| Morgan Stanley | 38,344 | $221.2K | 0.00% | +10,396+37.2% | Added |
| Vanguard Fiduciary Trust Co | 36,717 | $211.9K | 0.00% | +36,717 | New |
| BlackRock, Inc. | 36,043 | $208.0K | 0.00% | −2,411−6.3% | Reduced |
| Two Sigma Investments, LP | 30,650 | $176.8K | 0.00% | +2,891+10.4% | Added |
| State Street Corp | 26,510 | $153.0K | 0.00% | +1,100+4.3% | Added |
| Bridgeway Capital Management, LLC | 22,500 | $129.8K | 0.00% | 00.0% | Unchanged |
| Stonepine Capital Management, LLC | 20,400 | $117.7K | 0.10% | +20,400 | New |
| Velan Capital Investment Management LP | 18,000 | $103.9K | 0.07% | +18,000 | New |
| RBF Capital, LLC | 17,391 | $100.3K | 0.00% | 00.0% | Unchanged |
| Northern Trust Corp | 14,449 | $83.4K | 0.00% | +795+5.8% | Added |
| Independent Advisor Alliance | 14,230 | $82.1K | 0.00% | +14,230 | New |
| Connor, Clark & Lunn Investment Management Ltd. | 13,655 | $78.8K | 0.00% | +3,496+34.4% | Added |
| WealthTrust Asset Management, LLC | 12,416 | $71.6K | 0.04% | +12,416 | New |
| HRT Financial LP | 11,617 | $67.0K | 0.00% | +11,617 | New |
| Qube Research & Technologies Ltd | 11,103 | $64.1K | 0.00% | +11,103 | New |
| Johnson Financial Group, Inc. | 10,000 | $57.7K | 0.00% | 00.0% | Unchanged |
| Citigroup Inc | 8,703 | $50.2K | 0.00% | +8,702+870,200.0% | Added |
| FMR LLC | 7,806 | $45.0K | 0.00% | 00.0% | Unchanged |
| UBS Group AG | 6,184 | $35.7K | 0.00% | +3,493+129.8% | Added |
| Barclays PLC | 5,280 | $30.5K | 0.00% | −785−12.9% | Reduced |
| Nano Cap New Millennium Growth Fund L P | 4,000 | $23.1K | 0.02% | 00.0% | Unchanged |
| Steward Partners Investment Advisory, LLC | 2,215 | $12.8K | 0.00% | +2,215 | New |
| Vanguard Global Advisers, LLC | 725 | $4.18K | 0.00% | +725 | New |
| BNP Paribas Arbitrage, SA | 652 | $3.76K | 0.00% | +600+1,153.8% | Added |
| Strengthening Families & Communities, LLC | 268 | $1.55K | 0.00% | +268 | New |
| Royal Bank of Canada | 103 | $1.00K | 0.00% | −10−8.8% | Reduced |
| Tower Research Capital LLC (TRC) | 139 | $802 | 0.00% | +139 | New |
| Fortitude Family Office, LLC | 114 | $658 | 0.00% | 00.0% | Unchanged |
| Parallel Advisors, LLC | 49 | $283 | 0.00% | 00.0% | Unchanged |
| JPMorgan Chase & Co | 50 | $265 | 0.00% | 00.0% | Unchanged |
| Federated Hermes, Inc. | 34 | $196 | 0.00% | +34 | New |
| Harbour Investments, Inc. | 13 | $75 | 0.00% | +13 | New |
| SBI Securities Co., Ltd. | 5 | $29 | 0.00% | 00.0% | Unchanged |
| Redmile Group, LLC | 0 | $0 | 0.00% | −82,955−100.0% | Sold out |
| Jane Street Group, LLC | 0 | $0 | 0.00% | −33,114−100.0% | Sold out |
| Omers Administration Corp | 0 | $0 | 0.00% | −30,000−100.0% | Sold out |
| Walleye Capital LLC | 0 | $0 | 0.00% | −11,225−100.0% | Sold out |
| XTX Topco Ltd | 0 | $0 | 0.00% | −10,897−100.0% | Sold out |
| Keel Point, LLC | 0 | $0 | 0.00% | −10,225−100.0% | Sold out |
| Bank of America Corp | 0 | $0 | 0.00% | −6,704−100.0% | Sold out |
| Vanguard Group Inc | – | – | – | – | Not filed |