Kalaris Therapeutics, Inc. Common Stock
KLRS • NASDAQ
Kalaris Therapeutics, Inc. Common Stock is a publicly traded company on NASDAQ, with a market cap of $165.9M. As of Q3 2025, 71% of shares are held by 31 institutional investors, with Samsara BioCapital, LLC as the largest holder at 61.21%.
Market Cap$165.9M
Overview
Overview of institutional ownership in KLRS as of Q3 2025 with a market cap of $108.1M
All Institutions
- Institutions
- 31
- Value Held
- $76.4M
- Shares Held
- 13.2M
- Avg Position
- $2.5M
- Median Position
- $130.1K
Hedge Funds
- Hedge Funds
- 5
- Value Held
- $2.9M
- Shares Held
- 501.9K
- Avg Position
- $580.2K
- Median Position
- $479.5K
Ownership Breakdown
Based on market cap of $108.1M as of Q3 2025. Institutional (non-HF) excludes hedge funds to avoid double counting.
Biggest Investors
Institutions with the largest positions in KLRS as of Q3 2025
| Institution | Position Value |
|---|---|
 Samsara BioCapital, LLC Venture Capital | $66.2M 8.64% of portfolio |
T TANG CAPITAL MANAGEMENT LLC Institution | $2.4M 0.10% of portfolio |
S Siren, L.L.C. Institution | $1.8M 0.08% of portfolio |
 Woodline Partners LP Hedge Fund•Long/Short | $1.4M 0.01% of portfolio |
 VANGUARD GROUP INC Institution | $1.2M 0.00% of portfolio |
 RENAISSANCE TECHNOLOGIES LLC Hedge Fund•Quant | $651.7K 0.00% of portfolio |
R Redmile Group, LLC Hedge Fund•Sector | $479.5K 0.05% of portfolio |
 GEODE CAPITAL MANAGEMENT LLC ETF Provider | $373.1K 0.00% of portfolio |
B BlackRock, Inc. Institution | $233.4K 0.00% of portfolio |
S Squarepoint Ops LLC Hedge Fund•Quant | $232.2K 0.00% of portfolio |
Net Capital Flow
Institutional buying and selling activity for KLRS in Q3 2025
- Traded
- +$1.5M
- Buyers
- 17
- Sellers
- 11
- Total Bought
- +$3.7M
- Total Sold
- −$2.2M
- Avg Position
- $2.0M
Biggest Buyers
| Institution | Net Bought |
|---|---|
Woodline Partners LP Hedge Fund•Long/Short | +$1.4M +241.1K shares |
VANGUARD GROUP INC Institution | +$423.2K +73.2K shares |
T TANG CAPITAL MANAGEMENT LLC Institution | +$331.7K +57.4K shares |
 Fortis Capital Advisors, LLC RIA/Wealth | +$231.2K +40.0K shares |
 Belpointe Asset Management LLC RIA/Wealth | +$231.2K +40.0K shares |
GEODE CAPITAL MANAGEMENT LLC ETF Provider | +$225.9K +39.1K shares |
S Siren, L.L.C. Institution | +$206.2K +35.7K shares |
 MORGAN STANLEY RIA/Wealth | +$132.7K +23.0K shares |
B BRIDGEWAY CAPITAL MANAGEMENT INC Long Only Manager | +$130.1K +22.5K shares |
 GOLDMAN SACHS GROUP INC Institution | +$129.8K +22.5K shares |
Biggest Sellers
| Institution | Net Sold |
|---|---|
 Octagon Capital Advisors LP Hedge Fund•Sector | −$961.2K −360.0K shares |
 GILEAD SCIENCES, INC. Institution | −$848.5K −317.8K shares |
 MILLENNIUM MANAGEMENT LLC Hedge Fund•Multi-Strategy | −$168.6K −29.2K shares |
S Squarepoint Ops LLC Hedge Fund•Quant | −$109.4K −18.9K shares |
X XTX Topco Ltd Institution | −$64.7K −24.2K shares |
 TWO SIGMA ADVISERS, LLC Hedge Fund•Multi-Strategy | −$54.2K −20.3K shares |
 RAYMOND JAMES FINANCIAL INC RIA/Wealth | −$7.0K −2.6K shares |
T Tower Research Capital LLC Institution | −$5.7K −2.2K shares |
 FEDERATED INVESTORS INC /PA/ Long Only Manager | −$323.7 −56.0 shares |
 BANK OF AMERICA CORP /DE/ Institution | −$323.6 −56.0 shares |
Entry and Exit Activity
Institutions that initiated new positions or completely exited KLRS in Q3 2025
- New Positions
- 7
- New Value
- $781.7K
- Exited Positions
- 6
- Exited Value
- $1.9M
New Positions
| Institution | Position Value |
|---|---|
Belpointe Asset Management LLC RIA/Wealth | $231.2K 40.0K shares |
Fortis Capital Advisors, LLC RIA/Wealth | $231.2K 40.0K shares |
B BRIDGEWAY CAPITAL MANAGEMENT INC Long Only Manager | $130.1K 22.5K shares |
GOLDMAN SACHS GROUP INC Institution | $129.8K 22.5K shares |
 Johnson Financial Group, Inc. RIA/Wealth | $57.8K 10.0K shares |
S Strengthening Families & Communities, LLC Institution | $1.5K 268.0 shares |
 CITIGROUP INC Institution | $6.0 1.0 shares |
Exited Positions
| Institution | Previous Position |
|---|---|
Octagon Capital Advisors LP Hedge Fund•Sector | $961.2K 360.0K shares |
GILEAD SCIENCES, INC. Institution | $848.5K 317.8K shares |
X XTX Topco Ltd Institution | $64.7K 24.2K shares |
TWO SIGMA ADVISERS, LLC Hedge Fund•Multi-Strategy | $54.2K 20.3K shares |
RAYMOND JAMES FINANCIAL INC RIA/Wealth | $7.0K 2.6K shares |
T Tower Research Capital LLC Institution | $5.7K 2.2K shares |
Options Activity
Institutions with the largest Call and Put options positions in KLRS as of Q3 2025
- Call Positions
- 0
- Call Value
- -
- Put Positions
- 0
- Put Value
- -
Call Positions
| Institution | Position Value |
|---|---|
| No call positions found | |
Put Positions
| Institution | Position Value |
|---|---|
| No put positions found | |
Most Committed Institutions
Institutions with KLRS as the highest % of their portfolio as of Q3 2025
| Institution | Portfolio Weight |
|---|---|
Samsara BioCapital, LLC Venture Capital | 8.64% $66.2M |
T TANG CAPITAL MANAGEMENT LLC Institution | 0.10% $2.4M |
S Siren, L.L.C. Institution | 0.08% $1.8M |
R Redmile Group, LLC Hedge Fund•Sector | 0.05% $479.5K |
Fortis Capital Advisors, LLC RIA/Wealth | 0.04% $231.2K |
Belpointe Asset Management LLC RIA/Wealth | 0.01% $231.2K |
Woodline Partners LP Hedge Fund•Long/Short | 0.01% $1.4M |
R RBF Capital, LLC Institution | 0.00% $100.5K |
B BRIDGEWAY CAPITAL MANAGEMENT INC Long Only Manager | 0.00% $130.1K |
Johnson Financial Group, Inc. RIA/Wealth | 0.00% $57.8K |
Hedge Fund Spotlight
Discover hedge funds investing in KLRS
R
Redmile Group, LLC
Hedge Fund • Sector
Portfolio ManagerAmrit Nmn Nagpal
- Portfolio Value
- $1.0B
- Positions
- 40
- Last Reported
- Q3 2025
Sector Allocation
Position in Kalaris Therapeutics, Inc. Common Stock
- Market Value
- $479.5K
- Shares Held
- 83.0K
- Portfolio Weight
- 0.05%
- Owned Since
- 2025-Q1
| Top Holding | Sector | Market Value | Weight |
|---|---|---|---|
Biotechnology Healthcare | $145.4M | 14.15% | |
Biotechnology Healthcare | $116.8M | 11.36% | |
Biotechnology Healthcare | $98.1M | 9.55% |
