64 institutions reported holding $108.0M of KALARIS THERAPEUTICS INC (KLRS) in SEC 13F filings for 2026-03-31. Largest institutional holders: SAMSARA BIOCAPITAL, LLC ($74.7M), RTW INVESTMENTS, LP ($7.5M), Paradigm Biocapital Advisors LP ($4.0M), Alyeska Investment Group, L.P. ($3.3M), Siren, L.L.C. ($2.5M). Source: SEC Form 13F.
| Rank | Institution | Value | Shares | Change |
|---|---|---|---|---|
| 1 | SAMSARA BIOCAPITAL, LLC | $74.7M | 12.9M | Hold |
| 2 | RTW INVESTMENTS, LP | $7.5M | 1.3M | Hold |
| 3 | Paradigm Biocapital Advisors LP | $4.0M | 700,000 | Hold |
| 4 | Alyeska Investment Group, L.P. | $3.3M | 572,687 | Added |
| 5 | Siren, L.L.C. | $2.5M | 435,798 | Hold |
| 6 | Ikarian Capital, LLC | $2.1M | 360,000 | Hold |
| 7 | Propel Bio Management, LLC | $1.7M | 295,771 | Added |
| 8 | Kalehua Capital Management LLC | $1.6M | 271,170 | Added |
| 9 | VANGUARD CAPITAL MANAGEMENT LLC | $1.5M | 255,348 | New |
| 10 | RAYMOND JAMES FINANCIAL INC | $685,978 | 118,887 | Added |
| 11 | GOLDMAN SACHS GROUP INC | $637,602 | 110,503 | Added |
| 12 | Woodline Partners LP | $577,000 | 100,000 | Hold |
| 13 | ADAR1 Capital Management, LLC | $577,000 | 100,000 | Hold |
| 14 | WHI TRUST Co LLC | $562,535 | 97,493 | Hold |
| 15 | BOOTHBAY FUND MANAGEMENT, LLC | $532,346 | 92,261 | Hold |
| 16 | GEODE CAPITAL MANAGEMENT, LLC | $505,341 | 87,545 | Added |
| 17 | Simplify Asset Management Inc. | $504,448 | 87,426 | Added |
| 18 | MARSHALL WACE, LLP | $391,662 | 67,879 | Trimmed |
| 19 | RENAISSANCE TECHNOLOGIES LLC | $381,691 | 66,151 | Trimmed |
| 20 | MILLENNIUM MANAGEMENT LLC | $343,511 | 59,534 | New |
| 21 | SUSQUEHANNA INTERNATIONAL GROUP, LLP | $303,987 | 52,684 | Added |
| 22 | 683 Capital Management, LLC | $259,650 | 45,000 | Trimmed |
| 23 | Belpointe Asset Management LLC | $230,800 | 40,000 | Hold |
| 24 | Fortis Capital Advisors, LLC | $230,800 | 40,000 | Hold |
| 25 | Squarepoint Ops LLC | $229,490 | 39,773 | Added |
Source: SEC Form 13F filings · as of 2026-03-31