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Kalaris Therapeutics (KLRS) Institutional Ownership

Kalaris Therapeutics logo
$3.94 +0.04 (+1.03%)
As of 04:00 PM Eastern
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Institutional Ownership Changes (13F Filings) for Kalaris Therapeutics (NASDAQ:KLRS)

Current
Institutional Ownership
Percentage
66.05%
Number of
Institutional Buyers
(last 12 months)
35
Total
Institutional Inflows
(last 12 months)
$34.42M
Number of
Institutional Sellers
(last 12 months)
5
Total
Institutional Outflows
(last 12 months)
$920.01K
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KLRS Institutional Buying and Selling by Quarter

Kalaris Therapeutics Major Shareholders & Ownership History

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Reporting DateMajor Shareholder NameShares HeldMarket Value% of PortfolioQuarterly Change in SharesOwnership in CompanyDetails
8/21/2026 Pale Fire Capital SE39,626$161K0.0%N/A0.166%
8/21/2026 Velan Capital Investment Management LP25,000$102K0.1%+38.9%0.105%
8/20/2026 Susquehanna International Group LLP14,221$58K0.0%-73.0%0.060%
8/20/2026 Sigma Planning Corp10,167$41K0.0%N/A0.043%
8/18/2026 Stonepine Capital Management LLC30,122$122.60K0.0%N/A0.127%
8/14/2026 ADAR1 Capital Management LLC100,000$407K0.0%N/A0.420%
8/13/2026 Connor Clark & Lunn Investment Management Ltd.30,007$122K0.0%N/A0.126%
8/7/2026 BlackRock Inc.54,442$222K0.0%N/A0.229%
5/16/2026 Kalehua Capital Management LLC135,585$782K0.6%-3.1%0.570%
5/14/2026 Renaissance Technologies LLC66,151$382K0.0%-24.6%0.288%
5/7/2026 WealthTrust Asset Management LLC12,416$72K0.0%N/A0.054%
4/27/2026 Simplify Asset Management Inc.87,426$504K0.0%+335.5%0.381%
2/18/2026 XTX Topco Ltd10,897$92K0.0%N/A0.058%
2/18/2026 Ikarian Capital LLC360,000$3.04M0.2%N/A1.925%
2/18/2026 RTW Investments LP1,300,000$10.97M0.1%N/A6.952%
2/18/2026 Boothbay Fund Management LLC92,261$779K0.0%N/A0.493%
2/18/2026 683 Capital Management LLC80,590$680K0.0%N/A0.431%
2/17/2026 ADAR1 Capital Management LLC100,000$844K0.1%N/A0.535%
2/17/2026 Paradigm Biocapital Advisors LP700,000$5.91M0.2%N/A3.743%
2/16/2026 Squarepoint Ops LLC25,367$214K0.0%-36.9%0.136%
2/16/2026 OMERS ADMINISTRATION Corp30,000$253K0.0%N/A0.160%
2/16/2026 Barclays PLC6,065$51K0.0%N/A0.032%
2/13/2026 Marshall Wace LLP72,876$615K0.0%+416.3%0.390%
2/13/2026 Walleye Capital LLC11,225$95K0.0%N/A0.060%
2/13/2026 Kalehua Capital Management LLC139,901$1.18M1.1%N/A0.748%
2/13/2026 Alyeska Investment Group L.P.403,551$3.40M0.0%N/A2.158%
2/13/2026 Siren L.L.C.435,798$3.68M0.1%+36.9%2.330%
2/13/2026 State Street Corp25,410$214K0.0%+12.4%0.136%
2/12/2026 Jane Street Group LLC33,114$279K0.0%N/A0.177%
2/12/2026 Renaissance Technologies LLC87,751$741K0.0%-22.2%0.469%
2/12/2026 Keel Point LLC10,225$86K0.0%N/A0.055%
2/11/2026 Propel Bio Management LLC42,053$355K0.3%N/A0.225%
2/10/2026 Goldman Sachs Group Inc.34,303$290K0.0%+52.7%0.183%
2/9/2026 Geode Capital Management LLC82,647$698K0.0%+28.0%0.442%
2/9/2026 Simplify Asset Management Inc.20,074$169K0.0%N/A0.107%
2/6/2026 Nano Cap New Millennium Growth Fund L P4,000$34K0.0%N/A0.021%
2/5/2026 WHI TRUST Co LLC97,493$823K0.6%N/A0.521%
11/17/2025 Woodline Partners LP241,102$1.39M0.0%N/A1.289%
11/17/2025 Millennium Management LLC24,923$144K0.0%-53.9%0.133%
11/14/2025 Bridgeway Capital Management LLC22,500$130K0.0%N/A0.120%
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11/14/2025 Squarepoint Ops LLC40,173$232K0.0%-32.0%0.215%
11/13/2025 Johnson Financial Group Inc.10,000$58K0.0%N/A0.053%
11/3/2025 Belpointe Asset Management LLC40,000$231K0.0%N/A0.214%
10/31/2025 Fortis Capital Advisors LLC40,000$231K0.0%N/A0.214%
8/15/2025 Octagon Capital Advisors LP360,000$961K0.2%-25.2%1.925%
8/14/2025 Gilead Sciences Inc.317,789$848K0.1%-56.1%1.699%
8/12/2025 XTX Topco Ltd24,234$65K0.0%N/A0.130%


KLRS Institutional Ownership - Frequently Asked Questions

During the previous two years, 41 institutional investors and hedge funds held shares of Kalaris Therapeutics. The most heavily invested institutionals were RTW Investments LP ($10.97M), Paradigm Biocapital Advisors LP ($5.91M), Siren L.L.C. ($3.68M), Alyeska Investment Group L.P. ($3.40M), Ikarian Capital LLC ($3.04M), Woodline Partners LP ($1.39M), and Octagon Capital Advisors LP ($961K).Learn more on Kalaris Therapeutics' institutional investors.

66.05% of Kalaris Therapeutics' stock is owned by institutional investors. Learn more on KLRS's institutional investor holdings.

Of the 35 institutional investors that purchased Kalaris Therapeutics' stock in the last 24 months, the following investors and hedge funds have bought the highest volume of shares: RTW Investments LP ($1.30M), Paradigm Biocapital Advisors LP ($700K), Alyeska Investment Group L.P. ($403.55K), Ikarian Capital LLC ($360K), Woodline Partners LP ($241.10K), ADAR1 Capital Management LLC ($200K), and Kalehua Capital Management LLC ($139.90K).

Institutional investors have bought a total of 4,355,212 shares in the last 24 months. This purchase volume represents approximately $34.42M in transactions.

The following institutional investors have sold Kalaris Therapeutics stock in the last 24 months: Renaissance Technologies LLC ($46.60K), Susquehanna International Group LLP ($38.46K), Squarepoint Ops LLC ($33.73K), Millennium Management LLC ($29.17K), and Kalehua Capital Management LLC ($4.32K).

Institutional investors have sold a total of 152,276 shares in the last 24 months. This volume of shares sold represents approximately $920.01K in transactions.


Related Companies

Institutional ownership data for NASDAQ:KLRS is compiled from quarterly 13F filings submitted to the U.S. Securities and Exchange Commission (SEC), with the most recent received on 8/21/2026. New 13F filings are added each quarter as they're published.
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