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About 69.9% of KLRS shares are held by financial institutions. CITIGROUP INC is the top corporate investor, holding 1 shares valued at $8.00. A 0% stake in Kalaris Therapeutics Inc is owned by the company. FEDERATED HERMES, INC. owns 0 shares valued at -, which translates its holding of 0% of the stake in the company.
| Date | Holder | % Stake | Shares Held | Total Value ($) | Shares | % Change in Portfolio |
|---|---|---|---|---|---|---|
| Dec 31, 2025 | CITIGROUP INC | 0% | 1 | 8 | 0 | 0 |
| Dec 31, 2025 | FEDERATED HERMES, INC. | 0% | 0 | - | -578 | -100.00% |
| Dec 31, 2025 | TANG CAPITAL MANAGEMENT LLC | 0% | 0 | - | -418.24K | -100.00% |
| Dec 31, 2025 | BLACKROCK, INC. | 0.21% | 38.45K | 324.55K | -1.93K | -4.77% |
| Dec 31, 2025 | FORTIS CAPITAL ADVISORS, LLC | 0.21% | 40K | 337.6K | 0 | 0 |
| Dec 31, 2025 | BELPOINTE ASSET MANAGEMENT LLC | 0.21% | 40K | 337.6K | 0 | 0 |
| Dec 31, 2025 | PROPEL BIO MANAGEMENT, LLC | 0.22% | 42.05K | 354.93K | 42.05K | +100.00% |
| Dec 31, 2025 | MARSHALL WACE, LLP | 0.39% | 72.88K | 615.07K | 58.76K | +416.30% |
| Dec 31, 2025 | GEODE CAPITAL MANAGEMENT, LLC | 0.44% | 82.65K | 697.6K | 18.1K | +28.03% |
| Dec 31, 2025 | SBI SECURITIES CO., LTD. | 0% | 5 | 42 | -3 | -37.50% |
| Dec 31, 2025 | PARALLEL ADVISORS, LLC | 0% | 49 | 414 | 0 | 0 |
| Dec 31, 2025 | JPMORGAN CHASE & CO | 0% | 50 | 422 | 0 | 0 |
| Dec 31, 2025 | BNP PARIBAS ARBITRAGE, SNC | 0% | 52 | 439 | -89 | -63.12% |
| Dec 31, 2025 | FORTITUDE FAMILY OFFICE, LLC | 0% | 114 | 962 | 114 | +100.00% |
| Dec 31, 2025 | WALLEYE CAPITAL LLC | 0.06% | 11.23K | 94.74K | 11.23K | +100.00% |
| Dec 31, 2025 | OMERS ADMINISTRATION CORP | 0.16% | 30K | 253.2K | 30K | +100.00% |
| Dec 31, 2025 | 683 CAPITAL MANAGEMENT, LLC | 0.43% | 80.59K | 680.18K | 80.59K | +100.00% |
| Dec 31, 2025 | REDMILE GROUP, LLC | 0.44% | 82.96K | 700.14K | 0 | 0 |
| Dec 31, 2025 | BARCLAYS PLC | 0.03% | 6.07K | 51.19K | 6.07K | +100.00% |
| Dec 31, 2025 | BANK OF AMERICA CORP /DE/ | 0.04% | 6.7K | 56.58K | 6.49K | +2,989.40% |
| Dec 31, 2025 | FMR LLC | 0.04% | 7.81K | 65.88K | 0 | 0 |
| Dec 31, 2025 | NORTHERN TRUST CORP | 0.07% | 13.65K | 115.24K | 13.65K | +100.00% |
| Dec 31, 2025 | RBF CAPITAL, LLC | 0.09% | 17.39K | 146.78K | 0 | 0 |
| Dec 31, 2025 | SIMPLIFY ASSET MANAGEMENT INC. | 0.11% | 20.07K | 169.43K | 20.07K | +100.00% |
| Dec 31, 2025 | SQUAREPOINT OPS LLC | 0.14% | 25.37K | 214.1K | -14.81K | -36.86% |
| Dec 31, 2025 | STATE STREET CORP | 0.14% | 25.41K | 214.46K | 2.8K | +12.38% |
| Dec 31, 2025 | MORGAN STANLEY | 0.15% | 27.95K | 235.88K | 3.03K | +12.16% |
| Dec 31, 2025 | ALYESKA INVESTMENT GROUP, L.P. | 2.16% | 403.55K | 3.4M | 403.55K | +100.00% |
| Dec 31, 2025 | RENAISSANCE TECHNOLOGIES LLC | 0.47% | 87.75K | 740.62K | -25K | -22.17% |
| Dec 31, 2025 | BOOTHBAY FUND MANAGEMENT, LLC | 0.49% | 92.26K | 778.68K | 92.26K | +100.00% |
| Dec 31, 2025 | ADAR1 CAPITAL MANAGEMENT, LLC | 0.53% | 100K | 844K | 100K | +100.00% |
| Dec 31, 2025 | WOODLINE PARTNERS LP | 0.53% | 100K | 844K | -141.1K | -58.52% |
| Dec 31, 2025 | CONNOR, CLARK & LUNN INVESTMENT MANAGEMENT LTD. | 0.05% | 10.16K | 85.74K | 10.16K | +100.00% |
| Dec 31, 2025 | JOHNSON FINANCIAL GROUP, INC. | 0.05% | 10K | 84.4K | 0 | 0 |
| Dec 31, 2025 | 0.52% | 97.49K | 822.84K | 97.49K | +100.00% | |
| Dec 31, 2025 | IKARIAN CAPITAL, LLC | 1.93% | 360K | 3.04M | 360K | +100.00% |
| Dec 31, 2025 | PARADIGM BIOCAPITAL ADVISORS LP | 3.74% | 700K | 5.91M | 700K | +100.00% |
| Dec 31, 2025 | RTW INVESTMENTS, LP | 6.95% | 1.3M | 10.97M | 1.3M | +100.00% |
| Dec 31, 2025 | SAMSARA BIOCAPITAL, LLC | 69.23% | 12.95M | 109.28M | 1.5M | +13.10% |
| Dec 31, 2025 | SIREN, L.L.C. | 2.33% | 435.8K | 3.68M | 117.53K | +36.93% |
| Dec 31, 2025 | JANE STREET GROUP, LLC | 0.18% | 33.11K | 279.48K | 33.11K | +100.00% |
| Dec 31, 2025 | UBS GROUP AG | 0.01% | 2.69K | 22.71K | -2.56K | -48.76% |
| Dec 31, 2025 | KEEL POINT, LLC | 0.05% | 10.23K | 86.3K | 10.23K | +100.00% |
| Dec 31, 2025 | XTX TOPCO LTD | 0.06% | 10.9K | 91.97K | 10.9K | +100.00% |
| Dec 31, 2025 | SUSQUEHANNA INTERNATIONAL GROUP, LLP | 0.07% | 12.86K | 108.51K | 12.86K | +100.00% |
| Dec 31, 2025 | GOLDMAN SACHS GROUP INC | 0.18% | 34.3K | 289.52K | 11.84K | +52.70% |
| Dec 31, 2025 | ROYAL BANK OF CANADA | 0% | 113 | 1K | 113 | +100.00% |
| Dec 31, 2025 | BRIDGEWAY CAPITAL MANAGEMENT, LLC | 0.12% | 22.5K | 189.9K | 0 | 0 |
| Dec 31, 2025 | TWO SIGMA INVESTMENTS, LP | 0.15% | 27.76K | 234.29K | 27.76K | +100.00% |
| Dec 31, 2025 | RAYMOND JAMES FINANCIAL INC | 0.47% | 88.44K | 746.4K | 88.44K | +100.00% |
| Dec 31, 2025 | NANO CAP NEW MILLENNIUM GROWTH FUND L P | 0.02% | 4K | 33.76M | 4K | +100.00% |
| Dec 31, 2025 | VANGUARD GROUP INC | 1.57% | 292.79K | 2.47M | 89.74K | +44.20% |
| Dec 31, 2025 | FARTHER FINANCE ADVISORS, LLC | 0% | 0 | - | -33 | -100.00% |
| Dec 31, 2025 | STRENGTHENING FAMILIES & COMMUNITIES, LLC | 0% | 0 | - | -268 | -100.00% |
| Dec 31, 2025 | MILLENNIUM MANAGEMENT LLC | 0% | 0 | - | -24.92K | -100.00% |
| Sep 30, 2025 | BELPOINTE ASSET MANAGEMENT LLC | 0.21% | 40K | 231.2K | 40K | +100.00% |
| Sep 30, 2025 | BANK OF AMERICA CORP /DE/ | 0% | 217 | 1.25K | -56 | -20.51% |
| Sep 30, 2025 | JPMORGAN CHASE & CO | 0% | 50 | 289 | 0 | 0 |
| Sep 30, 2025 | SIREN, L.L.C. | 1.7% | 318.26K | 1.84M | 35.68K | +12.63% |
| Sep 30, 2025 | VANGUARD GROUP INC | 1.09% | 203.05K | 1.17M | 73.21K | +56.39% |
| Sep 30, 2025 | RENAISSANCE TECHNOLOGIES LLC | 0.6% | 112.75K | 651.7K | 16K | +16.54% |
| Sep 30, 2025 | FMR LLC | 0.04% | 7.81K | 45.12K | 0 | 0 |
| Sep 30, 2025 | MILLENNIUM MANAGEMENT LLC | 0.13% | 24.92K | 144.06K | -29.17K | -53.92% |
| Sep 30, 2025 | STRENGTHENING FAMILIES & COMMUNITIES, LLC | 0% | 268 | 1.55K | 268 | +100.00% |
| Sep 30, 2025 | BNP PARIBAS ARBITRAGE, SNC | 0% | 141 | 815 | 0 | 0 |
| Sep 30, 2025 | SBI SECURITIES CO., LTD. | 0% | 8 | 46 | -2 | -20.00% |
| Sep 30, 2025 | CITIGROUP INC | 0% | 1 | 6 | 1 | +100.00% |
| Sep 30, 2025 | RAYMOND JAMES FINANCIAL INC | 0% | 0 | - | -2.63K | -100.00% |
| Sep 30, 2025 | GILEAD SCIENCES, INC. | 0% | 0 | - | -317.79K | -100.00% |
| Sep 30, 2025 | GEODE CAPITAL MANAGEMENT, LLC | 0.35% | 64.55K | 373.15K | 39.08K | +153.38% |
| Sep 30, 2025 | BLACKROCK, INC. | 0.22% | 40.38K | 233.39K | 2.22K | +5.83% |
| Sep 30, 2025 | FORTIS CAPITAL ADVISORS, LLC | 0.21% | 40K | 231.2K | 40K | +100.00% |
| Sep 30, 2025 | XTX TOPCO LTD | 0% | 0 | - | -24.23K | -100.00% |
| Sep 30, 2025 | OCTAGON CAPITAL ADVISORS LP | 0% | 0 | - | -360K | -100.00% |
| Sep 30, 2025 | MARSHALL WACE, LLP | 0.08% | 14.12K | 81.59K | 0 | 0 |
| Sep 30, 2025 | JOHNSON FINANCIAL GROUP, INC. | 0.05% | 10K | 57.8K | 10K | +100.00% |
| Sep 30, 2025 | UBS GROUP AG | 0.03% | 5.25K | 30.36K | 1.14K | +27.60% |
| Sep 30, 2025 | FEDERATED HERMES, INC. | 0% | 578 | 3.34K | -56 | -8.83% |
| Sep 30, 2025 | TWO SIGMA ADVISERS, LP | 0% | 0 | - | -20.28K | -100.00% |
| Sep 30, 2025 | SAMSARA BIOCAPITAL, LLC | 61.22% | 11.45M | 66.17M | 0 | 0 |
| Sep 30, 2025 | TANG CAPITAL MANAGEMENT LLC | 2.24% | 418.24K | 2.42M | 57.38K | +15.90% |
| Sep 30, 2025 | WOODLINE PARTNERS LP | 1.29% | 241.1K | 1.39M | 241.1K | +100.00% |
| Sep 30, 2025 | REDMILE GROUP, LLC | 0.44% | 82.96K | 479.48K | 0 | 0 |
| Sep 30, 2025 | SQUAREPOINT OPS LLC | 0.21% | 40.17K | 232.2K | -18.92K | -32.02% |
| Sep 30, 2025 | MORGAN STANLEY | 0.13% | 24.92K | 144.03K | 22.95K | +1,168.74% |
| Sep 30, 2025 | STATE STREET CORP | 0.12% | 22.61K | 130.69K | 11.9K | +111.11% |
| Sep 30, 2025 | BRIDGEWAY CAPITAL MANAGEMENT, LLC | 0.12% | 22.5K | 130.05K | 22.5K | +100.00% |
| Sep 30, 2025 | GOLDMAN SACHS GROUP INC | 0.12% | 22.47K | 129.85K | 22.47K | +100.00% |
| Sep 30, 2025 | RBF CAPITAL, LLC | 0.09% | 17.39K | 100.52K | 0 | 0 |
| Sep 30, 2025 | PARALLEL ADVISORS, LLC | 0% | 49 | 283 | 0 | 0 |
| Sep 30, 2025 | FARTHER FINANCE ADVISORS, LLC | 0% | 33 | 191 | 0 | 0 |
| Sep 30, 2025 | TOWER RESEARCH CAPITAL LLC (TRC) | 0% | 0 | - | -2.15K | -100.00% |
| Jun 30, 2025 | SIREN, L.L.C. | 1.51% | 282.59K | 754.51K | 0 | 0 |
| Jun 30, 2025 | JPMORGAN CHASE & CO | 0% | 50 | 134 | -245 | -83.05% |
| Jun 30, 2025 | STATE STREET CORP | 0.06% | 10.71K | 28.6K | 0 | 0 |
| Jun 30, 2025 | RBF CAPITAL, LLC | 0.09% | 17.39K | 46.43K | 0 | 0 |
| Jun 30, 2025 | XTX TOPCO LTD | 0.13% | 24.23K | 64.71K | 24.23K | +100.00% |
| Jun 30, 2025 | GEODE CAPITAL MANAGEMENT, LLC | 0.14% | 25.48K | 68.04K | -1.31K | -4.89% |
| Jun 30, 2025 | WOODLINE PARTNERS LP | 0% | 0 | - | -21.52K | -100.00% |
| Jun 30, 2025 | MORGAN STANLEY | 0.01% | 1.96K | 5.24K | 668 | +51.54% |
| Jun 30, 2025 | TOWER RESEARCH CAPITAL LLC (TRC) | 0.01% | 2.15K | 5.75K | 719 | +50.14% |
| Jun 30, 2025 | TWO SIGMA ADVISERS, LP | 0.11% | 20.28K | 54.15K | -1.3K | -6.02% |
| Jun 30, 2025 | BLACKROCK, INC. | 0.2% | 38.16K | 101.88K | 10.64K | +38.68% |
| Jun 30, 2025 | BNP PARIBAS ARBITRAGE, SNC | 0% | 141 | 376 | 14 | +11.02% |
| Jun 30, 2025 | COLDSTREAM CAPITAL MANAGEMENT INC | 0% | 0 | - | -208 | -100.00% |
| Jun 30, 2025 | SUSQUEHANNA INTERNATIONAL GROUP, LLP | 0% | 0 | - | -13.8K | -100.00% |
| Jun 30, 2025 | ECOR1 CAPITAL, LLC | 0% | 0 | - | -201.72K | -100.00% |
| Jun 30, 2025 | EVERSOURCE WEALTH ADVISORS, LLC | 0% | 0 | - | -30 | -100.00% |
| Jun 30, 2025 | UBS GROUP AG | 0.02% | 4.12K | 10.99K | -5.15K | -55.56% |
| Jun 30, 2025 | RAYMOND JAMES FINANCIAL INC | 0.01% | 2.63K | 7.02K | 2.63K | +100.00% |
| Jun 30, 2025 | PARALLEL ADVISORS, LLC | 0% | 49 | 131 | 0 | 0 |
| Jun 30, 2025 | SAMSARA BIOCAPITAL, LLC | 61.22% | 11.45M | 30.57M | 0 | 0 |
| Jun 30, 2025 | TANG CAPITAL MANAGEMENT LLC | 1.93% | 360.86K | 963.49K | 51.64K | +16.70% |
| Jun 30, 2025 | OCTAGON CAPITAL ADVISORS LP | 1.93% | 360K | 961.2K | -121K | -25.16% |
| Jun 30, 2025 | GILEAD SCIENCES, INC. | 1.7% | 317.79K | 848.5K | -405.48K | -56.06% |
| Jun 30, 2025 | VANGUARD GROUP INC | 0.69% | 129.84K | 346.67K | 14.75K | +12.82% |
| Jun 30, 2025 | RENAISSANCE TECHNOLOGIES LLC | 0.52% | 96.75K | 258.33K | 77.5K | +402.58% |
| Jun 30, 2025 | REDMILE GROUP, LLC | 0.44% | 82.96K | 221.49K | 0 | 0 |
| Jun 30, 2025 | SBI SECURITIES CO., LTD. | 0% | 10 | 27 | 10 | +100.00% |
| Jun 30, 2025 | BANK OF AMERICA CORP /DE/ | 0% | 273 | 729 | -5.15K | -94.97% |
| Jun 30, 2025 | MILLENNIUM MANAGEMENT LLC | 0.29% | 54.09K | 144.43K | 37.51K | +226.21% |
| Jun 30, 2025 | SQUAREPOINT OPS LLC | 0.32% | 59.1K | 157.78K | 44.51K | +305.12% |
| Jun 30, 2025 | 0% | 10 | 27 | 10 | +100.00% | |
| Jun 30, 2025 | FARTHER FINANCE ADVISORS, LLC | 0% | 33 | 88 | 0 | 0 |
| Jun 30, 2025 | FEDERATED HERMES, INC. | 0% | 634 | 1.69K | 0 | 0 |
| Jun 30, 2025 | MARSHALL WACE, LLP | 0.08% | 14.12K | 37.69K | 0 | 0 |
| Jun 30, 2025 | FMR LLC | 0.04% | 7.81K | 20.84K | 0 | 0 |
| Mar 31, 2025 | BNP PARIBAS ARBITRAGE, SNC | 0% | 127 | 1.02K | 127 | +100.00% |
| Mar 31, 2025 | MARSHALL WACE, LLP | 0.08% | 14.12K | 113.34K | 14.12K | +100.00% |
| Mar 31, 2025 | VANGUARD GROUP INC | 0.62% | 115.09K | 924.14K | 115.09K | +100.00% |
| Mar 31, 2025 | PARALLEL ADVISORS, LLC | 0% | 49 | 393 | 49 | +100.00% |
| Mar 31, 2025 | WOODLINE PARTNERS LP | 0.12% | 21.52K | 172.8K | 21.52K | +100.00% |
| Mar 31, 2025 | OCTAGON CAPITAL ADVISORS LP | 2.57% | 481K | 3.86M | 481K | +100.00% |
| Mar 31, 2025 | SAMSARA BIOCAPITAL, LLC | 61.21% | 11.45M | 91.93M | 11.45M | +100.00% |
| Mar 31, 2025 | MILLENNIUM MANAGEMENT LLC | 0.09% | 16.58K | 133.15K | 16.58K | +100.00% |
| Mar 31, 2025 | RBF CAPITAL, LLC | 0.09% | 17.39K | 139.65K | 17.39K | +100.00% |
| Mar 31, 2025 | RENAISSANCE TECHNOLOGIES LLC | 0.1% | 19.25K | 154.59K | 19.25K | +100.00% |
| Mar 31, 2025 | TANG CAPITAL MANAGEMENT LLC | 1.65% | 309.22K | 2.48M | 309.22K | +100.00% |
| Mar 31, 2025 | BANK OF AMERICA CORP /DE/ | 0.03% | 5.42K | 43.56K | 5.42K | +100.00% |
| Mar 31, 2025 | COLDSTREAM CAPITAL MANAGEMENT INC | 0% | 208 | 1.67K | 208 | +100.00% |
| Mar 31, 2025 | MORGAN STANLEY | 0.01% | 1.3K | 10.41K | 1.3K | +100.00% |
| Mar 31, 2025 | TOWER RESEARCH CAPITAL LLC (TRC) | 0.01% | 1.43K | 11.52K | 1.43K | +100.00% |
| Mar 31, 2025 | FMR LLC | 0.04% | 7.81K | 62.68K | 7.81K | +100.00% |
| Mar 31, 2025 | SUSQUEHANNA INTERNATIONAL GROUP, LLP | 0.07% | 13.8K | 110.78K | 13.8K | +100.00% |
| Mar 31, 2025 | UBS GROUP AG | 0.05% | 9.26K | 74.37K | 9.26K | +100.00% |
| Mar 31, 2025 | TWO SIGMA ADVISERS, LP | 0.12% | 21.58K | 173.3K | 21.58K | +100.00% |
| Mar 31, 2025 | GEODE CAPITAL MANAGEMENT, LLC | 0.14% | 26.79K | 215.17K | 26.79K | +100.00% |
| Mar 31, 2025 | GILEAD SCIENCES, INC. | 3.87% | 723.27K | 5.81M | 723.27K | +100.00% |
| Mar 31, 2025 | STATE STREET CORP | 0.06% | 10.71K | 86K | 10.71K | +100.00% |
| Mar 31, 2025 | REDMILE GROUP, LLC | 0.44% | 82.96K | 666.13K | 82.96K | +100.00% |
| Mar 31, 2025 | FARTHER FINANCE ADVISORS, LLC | 0% | 33 | 264 | 33 | +100.00% |
| Mar 31, 2025 | BLACKROCK, INC. | 0.15% | 27.51K | 220.94K | 27.51K | +100.00% |
| Mar 31, 2025 | SQUAREPOINT OPS LLC | 0.08% | 14.59K | 117.13K | 14.59K | +100.00% |
| Mar 31, 2025 | JPMORGAN CHASE & CO | 0% | 295 | 2.37K | 295 | +100.00% |
| Mar 31, 2025 | ECOR1 CAPITAL, LLC | 1.08% | 201.72K | 1.62M | 201.72K | +100.00% |
| Mar 31, 2025 | SIREN, L.L.C. | 1.51% | 282.59K | 2.27M | 282.59K | +100.00% |
| Mar 31, 2025 | FEDERATED HERMES, INC. | 0% | 634 | 5.09K | 634 | +100.00% |
| Mar 31, 2025 | EVERSOURCE WEALTH ADVISORS, LLC | 0% | 30 | 241 | 30 | +100.00% |
Among the KLRS insiders holding of 16.17% of the stake in company, AKKARAJU SRINIVAS, , holds the largest shares of 1.98M. HAGEN BRETT R, Chief Accounting Officer, is the second largest KLRS insider with ownership of 0 shares. , , stands third with possession of - shares of that stake.
| Insiders | Designation | Shares Held |
|---|---|---|
| AKKARAJU SRINIVAS | 1.98M | |
| HAGEN BRETT R | Chief Accounting Officer | 0 |
| Date | Insider | Type | Cost | Shares | Value ($) | Shares Total |
|---|---|---|---|---|---|---|
| Mar 20, 2026 | HAGEN BRETT R | SALE | 6.72 | 1.92K | 12.87K | 0 |
| Dec 18, 2025 | AKKARAJU SRINIVAS | PURCHASE | 10.42 | 479.85K | 5M | 1.98M |
| Mar 26, 2025 | HAGEN BRETT R | SALE | 8.97 | 907 | 8.14K | 1.93K |