Kalaris Therapeutics, Inc. (KLRS) — Institutional Holders, Q2 2026
57 institutional investment managers reported a KLRS position on SEC Form 13F-HR for the quarter ended June 30, 2026, with a combined reported value of $73.4M. Every filer is listed below, ranked by position value. Put and call option positions are excluded, and a firm filing several lots or share classes is shown once with its total.
KLRS in Q2 2026: what funds did
Funds that filed a 13F for both Q1 2026 and Q2 2026, by what they did with the common stock. Share counts are adjusted for any split between the two quarters; dollar figures are the change in shares at this quarter’s price.
Biggest buyers
- UBS Group AGAdded · +255,947 sh+$1.0M
- VANGUARD CAPITAL MANAGEMENTAdded · +143,364 sh+$583.5K
- CITADEL ADVISORSNew · +95,772 sh+$389.8K
- RENAISSANCE TECHNOLOGIESAdded · +83,200 sh+$338.6K
- Verdad AdvisersNew · +80,297 sh+$326.8K
Biggest sellers
- Paradigm Biocapital AdvisorsSold out · -700,000 sh-$2.8M
- Propel Bio ManagementSold out · -295,771 sh-$1.2M
- Kalehua Capital ManagementSold out · -135,585 sh-$551.8K
- GOLDMAN SACHS GROUPTrimmed · -94,449 sh-$384.4K
- Simplify Asset ManagementSold out · -87,426 sh-$355.8K
KLRS 13F holders ranked 1–57 of 57
| # | Institution | Shares | Value | % of portfolio | QoQShares vs Q1 2026 |
|---|---|---|---|---|---|
| 1 | Samsara BioCapital#1 · 12,881,175 sh | 12,881,175 | $52.4M | 4.31% | -0.5% |
| 2 | RTW INVESTMENTS#2 · 1,300,000 sh | 1,300,000 | $5.3M | 0.05% | 0.0% |
| 3 | Alyeska Investment Group, L.P.#3 · 572,687 sh | 572,687 | $2.3M | <0.01% | 0.0% |
| 4 | Siren, L.L.C.#4 · 435,798 sh | 435,798 | $1.8M | 0.04% | 0.0% |
| 5 | VANGUARD CAPITAL MANAGEMENT#5 · 398,712 sh | 398,712 | $1.6M | 0.00% | +56.1% |
| 6 | Ikarian Capital#6 · 360,000 sh | 360,000 | $1.5M | 0.16% | 0.0% |
| 7 | UBS Group AG#7 · 262,131 sh | 262,131 | $1.1M | <0.01% | +4138.9% |
| 8 | RENAISSANCE TECHNOLOGIES#8 · 149,351 sh | 149,351 | $607.9K | <0.01% | +125.8% |
| 9 | MARSHALL WACE, LLP#9 · 139,201 sh | 139,201 | $566.5K | <0.01% | +105.1% |
| 10 | GEODE CAPITAL MANAGEMENT#10 · 114,037 sh | 114,037 | $464.3K | 0.00% | +30.3% |
| 11 | Woodline Partners#11 · 100,000 sh | 100,000 | $407.0K | <0.01% | 0.0% |
| 12 | ADAR1 Capital Management#12 · 100,000 sh | 100,000 | $407.0K | 0.02% | 0.0% |
| 13 | WHI#13 · 97,493 sh | 97,493 | $396.8K | 0.26% | 0.0% |
| 14 | RAYMOND JAMES FINANCIAL#14 · 97,164 sh | 97,164 | $395.5K | <0.01% | -18.3% |
| 15 | CITADEL ADVISORS#15 · 95,772 sh | 95,772 | $389.8K | 0.00% | New |
| 16 | BOOTHBAY FUND MANAGEMENT#16 · 92,261 sh | 92,261 | $375.5K | <0.01% | 0.0% |
| 17 | Verdad Advisers#17 · 80,297 sh | 80,297 | $326.8K | 0.31% | New |
| 18 | MORGAN STANLEY#18 · 72,326 sh | 72,326 | $294.4K | 0.00% | +88.6% |
| 19 | VANGUARD FIDUCIARY#19 · 66,179 sh | 66,179 | $269.3K | <0.01% | +80.2% |
| 20 | BlackRock#20 · 54,442 sh | 54,442 | $221.6K | 0.00% | +51.0% |
| 21 | Belpointe Asset Management#21 · 40,000 sh | 40,000 | $162.8K | <0.01% | 0.0% |
| 22 | Fortis Capital Advisors#22 · 40,000 sh | 40,000 | $162.8K | 0.02% | 0.0% |
| 23 | Pale Fire Capital SE#23 · 39,626 sh | 39,626 | $161.3K | 0.01% | New |
| 24 | Squarepoint Ops#24 · 38,775 sh | 38,775 | $157.8K | <0.01% | -2.5% |
| 25 | BRIDGEWAY CAPITAL MANAGEMENT#25 · 32,500 sh | 32,500 | $132.3K | <0.01% | +44.4% |
| 26 | Stonepine Capital Management#26 · 30,122 sh | 30,122 | $122.6K | 0.06% | +47.7% |
| 27 | Connor, Clark & Lunn Investment Management Ltd.#27 · 30,007 sh | 30,007 | $122.1K | <0.01% | +119.8% |
| 28 | Trexquant Investment#28 · 29,737 sh | 29,737 | $121.0K | <0.01% | New |
| 29 | STATE STREET#29 · 26,510 sh | 26,510 | $107.9K | 0.00% | 0.0% |
| 30 | NORTHERN#30 · 25,839 sh | 25,839 | $105.2K | 0.00% | +78.8% |
| 31 | Velan Capital Investment Management#31 · 25,000 sh | 25,000 | $101.8K | 0.06% | +38.9% |
| 32 | TWO SIGMA INVESTMENTS#32 · 23,847 sh | 23,847 | $97.1K | <0.01% | -22.2% |
| 33 | WealthTrust Asset Management#33 · 20,416 sh | 20,416 | $83.1K | — | +64.4% |
| 34 | Independent Advisor Alliance#34 · 18,125 sh | 18,125 | $73.8K | <0.01% | +27.4% |
| 35 | RBF Capital#35 · 17,391 sh | 17,391 | $70.8K | <0.01% | 0.0% |
| 36 | Quadrature Capital Ltd#36 · 16,527 sh | 16,527 | $67.3K | <0.01% | New |
| 37 | GOLDMAN SACHS GROUP#37 · 16,054 sh | 16,054 | $65.3K | 0.00% | -85.5% |
| 38 | DIMENSIONAL FUND ADVISORS#38 · 15,958 sh | 15,958 | $65.0K | 0.00% | New |
| 39 | SUSQUEHANNA INTERNATIONAL GROUP, LLP#39 · 14,221 sh | 14,221 | $57.9K | 0.00% | -73.0% |
| 40 | HRT FINANCIAL#40 · 13,723 sh | 13,723 | $55.0K | <0.01% | +18.1% |
| 41 | NANO CAP NEW MILLENNIUM GROWTH FUND L P#41 · 12,500 sh | 12,500 | $50.9K | 0.04% | +212.5% |
| 42 | Virtu Financial#42 · 10,845 sh | 10,845 | $44.0K | <0.01% | New |
| 43 | Sigma Planning#43 · 10,167 sh | 10,167 | $41.4K | — | New |
| 44 | FMR#44 · 7,806 sh | 7,806 | $31.8K | 0.00% | 0.0% |
| 45 | Integrated Wealth Concepts#45 · 5,000 sh | 5,000 | $20.4K | <0.01% | New |
| 46 | Tower Research Capital (TRC)#46 · 2,560 sh | 2,560 | $10.4K | <0.01% | +1741.7% |
| 47 | Steward Partners Investment Advisory#47 · 2,215 sh | 2,215 | $9.0K | 0.00% | 0.0% |
| 48 | Vanguard Global Advisers#48 · 725 sh | 725 | $3.0K | 0.00% | 0.0% |
| 49 | BARCLAYS PLC#49 · 303 sh | 303 | $1.2K | 0.00% | -94.3% |
| 50 | Strengthening Families & Communities#50 · 268 sh | 268 | $1.1K | — | 0.0% |
| 51 | BNP PARIBAS FINANCIAL MARKETS#51 · 52 sh | 52 | $212.00 | 0.00% | -92.0% |
| 52 | JPMORGAN CHASE#52 · 50 sh | 50 | $211.00 | 0.00% | 0.0% |
| 53 | Parallel Advisors#53 · 49 sh | 49 | $199.00 | 0.00% | 0.0% |
| 54 | HARBOUR INVESTMENTS#54 · 13 sh | 13 | $53.00 | 0.00% | 0.0% |
| 55 | Caitong International Asset Management , Ltd#55 · 7 sh | 7 | $28.00 | 0.00% | New |
| 56 | SBI Securities , Ltd.#56 · 5 sh | 5 | $20.00 | — | 0.0% |
| 57 | ROYAL BANK OF CANADA#57 · 12 sh | 12 | $0.00 | 0.00% | -88.3% |
Funds that sold out of KLRS in Q2 2026 (11)
Held KLRS at the end of Q1 2026 and filed a Q2 2026 13F without it. Not in the list above, because they no longer hold it. Largest prior position first.
| Institution | Shares sold | Value in Q1 2026 |
|---|---|---|
| Paradigm Biocapital Advisors700,000 sh | 700,000 | $4.0M |
| Propel Bio Management295,771 sh | 295,771 | $1.7M |
| Kalehua Capital Management135,585 sh | 135,585 | $782.3K |
| Simplify Asset Management87,426 sh | 87,426 | $504.4K |
| MILLENNIUM MANAGEMENT59,534 sh | 59,534 | $343.5K |
| 683 Capital Management45,000 sh | 45,000 | $259.6K |
| Qube Research & Technologies Ltd11,103 sh | 11,103 | $64.1K |
| Johnson Financial Group10,000 sh | 10,000 | $57.7K |
| CITIGROUP8,703 sh | 8,703 | $50.2K |
| Fortitude Family Office114 sh | 114 | $658.00 |
| FEDERATED HERMES34 sh | 34 | $196.00 |
Source: Form 13F-HR filings on SEC EDGAR, Q2 2026. Values are as reported by each manager at quarter end. “% of portfolio” is the position’s share of the manager’s total reported 13F value for the same quarter. “New” means the manager filed a 13F for Q1 2026 without this position; a dash means no comparison is available. Where a manager’s own filing is internally inconsistent its value is withheld and it is listed last. 13F data shows reported holdings, not recommendations.