KLRS Kalaris Therapeutics, Inc.
Kalaris Therapeutics, Inc. (KLRS) Institutional Ownership
What the institutions did with KLRS last quarter, from their 13F filings. Counting managers rather than shares is the point: a single index fund adding to a position tells you far less than four hundred separate managers all deciding to. Positions as reported for the quarter ended June 30, 2026.
Every manager below opens. Subscribers can see any firm's whole portfolio — every position, its weight, and what they bought, trimmed and exited last quarter.
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Each block is one manager, sized by shares held and colored by how much they moved the position last quarter. Green added, red cut, grey stood pat.
Largest holders
| Manager | Shares | % of reported |
|---|---|---|
| SAMSARA BIOCAPITAL, LLC | 12.9M | 71.4% |
| RTW INVESTMENTS, LP | 1.3M | 7.2% |
| Alyeska Investment Group, L.P. | 572.7K | 3.2% |
| Siren, L.L.C. | 435.8K | 2.4% |
| VANGUARD CAPITAL MANAGEMENT LLC | 398.7K | 2.2% |
| Ikarian Capital, LLC | 360.0K | 2.0% |
| UBS Group AG | 262.1K | 1.5% |
| RENAISSANCE TECHNOLOGIES LLC | 149.4K | 0.8% |
| MARSHALL WACE, LLP | 139.2K | 0.8% |
| GEODE CAPITAL MANAGEMENT, LLC | 114.0K | 0.6% |
| Woodline Partners LP | 100.0K | 0.6% |
| ADAR1 Capital Management, LLC | 100.0K | 0.6% |
| WHI TRUST Co LLC | 97.5K | 0.5% |
| RAYMOND JAMES FINANCIAL INC | 97.2K | 0.5% |
| CITADEL ADVISORS LLC | 95.8K | 0.5% |
| BOOTHBAY FUND MANAGEMENT, LLC | 92.3K | 0.5% |
| Verdad Advisers, LP | 80.3K | 0.4% |
| MORGAN STANLEY | 72.3K | 0.4% |
| VANGUARD FIDUCIARY TRUST CO | 66.2K | 0.4% |
| BlackRock, Inc. | 54.4K | 0.3% |
| Belpointe Asset Management LLC | 40.0K | 0.2% |
| Fortis Capital Advisors, LLC | 40.0K | 0.2% |
| Pale Fire Capital SE | 39.6K | 0.2% |
| Squarepoint Ops LLC | 38.8K | 0.2% |
| BRIDGEWAY CAPITAL MANAGEMENT, LLC | 32.5K | 0.2% |
Largest changes
| Manager | Action | Previous | Current | Change |
|---|---|---|---|---|
| Paradigm Biocapital Advisors LP | Sold Out | 700.0K | 0 | -700.0K |
| Propel Bio Management, LLC | Sold Out | 295.8K | 0 | -295.8K |
| Kalehua Capital Management LLC | Sold Out | 271.2K | 0 | -271.2K |
| UBS Group AG | Increased | 6.2K | 262.1K | +255.9K |
| VANGUARD CAPITAL MANAGEMENT LLC | Increased | 255.3K | 398.7K | +143.4K |
| CITADEL ADVISORS LLC | New | 0 | 95.8K | +95.8K |
| GOLDMAN SACHS GROUP INC | Reduced | 110.5K | 16.1K | -94.4K |
| Simplify Asset Management Inc. | Sold Out | 87.4K | 0 | -87.4K |
| RENAISSANCE TECHNOLOGIES LLC | Increased | 66.2K | 149.4K | +83.2K |
| Verdad Advisers, LP | New | 0 | 80.3K | +80.3K |
| MARSHALL WACE, LLP | Increased | 67.9K | 139.2K | +71.3K |
| SAMSARA BIOCAPITAL, LLC | Reduced | 12.9M | 12.9M | -66.9K |
| MILLENNIUM MANAGEMENT LLC | Sold Out | 59.5K | 0 | -59.5K |
| 683 Capital Management, LLC | Sold Out | 45.0K | 0 | -45.0K |
| Pale Fire Capital SE | New | 0 | 39.6K | +39.6K |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | Reduced | 52.7K | 14.2K | -38.5K |
| MORGAN STANLEY | Increased | 38.3K | 72.3K | +34.0K |
| Trexquant Investment LP | New | 0 | 29.7K | +29.7K |
| VANGUARD FIDUCIARY TRUST CO | Increased | 36.7K | 66.2K | +29.5K |
| GEODE CAPITAL MANAGEMENT, LLC | Increased | 87.5K | 114.0K | +26.5K |
| RAYMOND JAMES FINANCIAL INC | Reduced | 118.9K | 97.2K | -21.7K |
| BlackRock, Inc. | Increased | 36.0K | 54.4K | +18.4K |
| Quadrature Capital Ltd | New | 0 | 16.5K | +16.5K |
| Connor, Clark & Lunn Investment Management Ltd. | Increased | 13.7K | 30.0K | +16.4K |
| DIMENSIONAL FUND ADVISORS LP | New | 0 | 16.0K | +16.0K |
| NORTHERN TRUST CORP | Increased | 14.4K | 25.8K | +11.4K |
| Qube Research & Technologies Ltd | Sold Out | 11.1K | 0 | -11.1K |
| Virtu Financial LLC | New | 0 | 10.8K | +10.8K |
| Sigma Planning Corp | New | 0 | 10.2K | +10.2K |
| BRIDGEWAY CAPITAL MANAGEMENT, LLC | Increased | 22.5K | 32.5K | +10.0K |
| Johnson Financial Group, Inc. | Sold Out | 10.0K | 0 | -10.0K |
| Stonepine Capital Management, LLC | Increased | 20.4K | 30.1K | +9.7K |
| CITIGROUP INC | Sold Out | 8.7K | 0 | -8.7K |
| NANO CAP NEW MILLENNIUM GROWTH FUND L P | Increased | 4.0K | 12.5K | +8.5K |
| WealthTrust Asset Management, LLC | Increased | 12.4K | 20.4K | +8.0K |
| Velan Capital Investment Management LP | Increased | 18.0K | 25.0K | +7.0K |
| TWO SIGMA INVESTMENTS, LP | Reduced | 30.7K | 23.8K | -6.8K |
| BARCLAYS PLC | Reduced | 5.3K | 303 | -5.0K |
| Independent Advisor Alliance | Increased | 14.2K | 18.1K | +3.9K |
| Tower Research Capital LLC (TRC) | Increased | 139 | 2.6K | +2.4K |
| HRT FINANCIAL LP | Increased | 11.6K | 13.7K | +2.1K |
| Squarepoint Ops LLC | Reduced | 39.8K | 38.8K | -998 |
| BNP PARIBAS FINANCIAL MARKETS | Reduced | 652 | 52 | -600 |
| Fortitude Family Office, LLC | Sold Out | 114 | 0 | -114 |
| ROYAL BANK OF CANADA | Reduced | 103 | 12 | -91 |
| FEDERATED HERMES, INC. | Sold Out | 34 | 0 | -34 |
| Caitong International Asset Management Co., Ltd | New | 0 | 7 | +7 |
13F filings are due 45 days after quarter end and cover long positions in U.S.-listed equities only, so this is a lagged and partial picture: shorts, bonds and foreign listings never appear. Options positions are excluded here rather than folded into the share counts. Political ownership is coming.