Kalaris Therapeutics
KLRS · NASDAQ
$2.07+$0.16 (+8.38%)TodayMarket closed ·
Prev close $1.91
Who owns KLRS
Largest institutional holders, from their latest 13F filings
The 10 largest institutions hold 75.1% of KLRS’s shares.
- Samsara BioCapital, LLC54.1%
- RTW Investments L.P.5.5%
- ElevateBio LLC3.0%
- Alyeska Investment Group, L.P.2.4%
- Next 6 largest institutions10.0%
- All other shareholders24.9%
| Holder | Shares | % of shares |
|---|---|---|
| Samsara BioCapital, LLC | 12.88M | 54.15% |
| RTW Investments L.P. | 1.30M | 5.46% |
| ElevateBio LLC | 724.99K | 3.05% |
| Alyeska Investment Group, L.P. | 572.69K | 2.41% |
| Ferrara (Napoleone) | 504.00K | 2.12% |
| Invus Public Equities Advisors, LLC | 435.80K | 1.83% |
| F2 MG Ltd | 427.31K | 1.80% |
| Vanguard Capital Management, LLC | 398.71K | 1.68% |
| Ikarian Capital LLC | 360.00K | 1.51% |
| UBS Financial Services, Inc. | 262.13K | 1.10% |
Largest mutual fund holders
| Holder | Shares | % of shares |
|---|---|---|
| Vanguard Total Stock Market Index Fund | 255.34K | 1.07% |
| Vanguard Extended Market Index Fund | 137.37K | 0.58% |
| Fidelity Extended Market Index Fund | 58.88K | 0.25% |
| EA Bridgeway Ultra-Small Company Market ETF | 32.50K | 0.14% |
| iShares Micro-Cap ETF | 26.27K | 0.11% |
Insider trades
Form 4 filings by officers, directors and large holders
Over the last 6 months, insiders bought $1.18M (1 trade) of KLRS on the open market, with no sales.
| Insider | Type | Shares | Value |
|---|---|---|---|
| Vandekop Amy O'Leary | Award | 10.00K | — |
| KEATING LAURIE | Award | 18.00K | — |
| Bayko Liisa Ann | Award | 220.00K | — |
| Ferrara Napoleone | Award | 9.00K | — |
| Dybbs Michael | Award | 9.00K | — |
| Jovan-Embiricos Morana | Award | 9.00K | — |
| Hallal David | Award | 9.00K | — |
| ADAMIS ANTHONY P | Award | 9.00K | — |
| AKKARAJU SRINIVAS | Award | 9.00K | — |
| PATTERSON LEONE D | Award | 9.00K | — |
Short interest
Settled Sep 30, 2026
- Shares short
- 331.88K
- Days to cover
- 4.56
- % of shares outstanding
- 1.40%
- Average daily volume
- 72.77K
- Change since last report
- +4.2%
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