| Filer | Ownership | Change % | Holdings Value | Net Change | Nb Shares | Change % | Reporting Name | Report Period |
|---|---|---|---|---|---|---|---|---|
| Madison Avenue Partners, LP | 6.4% | $37,150,652 | 2,614,402 | Madison Avenue Partners, LP | 07 May 2025 | |||
| TANG CAPITAL MANAGEMENT LLC | 7.9% | $38,268,569 | 2,418,984 | TANG CAPITAL MANAGEMENT, LLC | 15 Oct 2025 | |||
| ExodusPoint Capital Management, LP | 6.3% | $28,675,722 | 1,907,899 | ExodusPoint Capital Management, LP | 10 Nov 2025 | |||
| VANGUARD GROUP INC | 5% | -22% | $31,056,075 | -$21,193,964 | 1,525,355 | -41% | The Vanguard Group | 31 Dec 2025 |
| ALKEON CAPITAL MANAGEMENT LLC | 2.7% | $15,645,210 | 1,101,000 | Alkeon Capital Management LLC | 31 Dec 2024 | |||
| D. E. SHAW & CO, L.P. | 3.9% | -24% | $14,745,042 | -$15,400,944 | 756,156 | -51% | D. E. Shaw & Co., L.P. | 31 Dec 2025 |
| FMR LLC | 1.7% | $10,010,547 | 704,472 | FMR LLC | 31 Jan 2025 | |||
| JPMORGAN CHASE & CO | 0.2% | -102% | $1,617,141 | -$35,146,204 | 113,803 | -96% | JPMORGAN CHASE & CO. | 30 Apr 2025 |
As of 31 Dec 2025, 103 institutional investors reported holding 12,944,968 shares of Keros Therapeutics, Inc. - Common Stock, $0.0001 par value per share (KROS). This represents 67% of the company’s total 19,388,615 outstanding shares.
The largest institutional shareholders of Keros Therapeutics, Inc. - Common Stock, $0.0001 par value per share (KROS) together control 79% of the company’s outstanding shares — a level of ownership often associated with strong institutional conviction and long‑term capital commitment.
| Institution | Ownership % | Shares Held | Share Change % | Portfolio % | Holdings Value |
|---|---|---|---|---|---|
| BlackRock, Inc. | 12% | 2,290,532 | -16% | 0% | $46,635,220 |
| VANGUARD GROUP INC | 7.9% | 1,525,355 | -44% | 0% | $31,056,228 |
| ARROWSTREET CAPITAL, LIMITED PARTNERSHIP | 6.9% | 1,334,516 | +416% | 0.02% | $27,170,746 |
| STATE STREET CORP | 5.5% | 1,075,993 | -17% | 0% | $21,907,217 |
| Madison Avenue Partners, LP | 4.2% | 823,707 | -70% | 0.72% | $16,770,675 |
| Qube Research & Technologies Ltd | 4% | 783,918 | +159% | 0.02% | $15,960,570 |
| JACOBS LEVY EQUITY MANAGEMENT, INC | 4% | 768,425 | +27% | 0.06% | $15,645,133 |
| D. E. Shaw & Co., Inc. | 3.9% | 755,473 | -43% | 0.01% | $15,381,430 |
| FEDERATED HERMES, INC. | 3.4% | 654,724 | +27% | 0.02% | $13,330,180 |
| GEODE CAPITAL MANAGEMENT, LLC | 3.3% | 635,208 | -24% | 0% | $12,935,496 |
| RENAISSANCE TECHNOLOGIES LLC | 3.1% | 591,686 | +282% | 0.02% | $12,046,727 |
| GOLDMAN SACHS GROUP INC | 3% | 590,517 | -55% | 0% | $12,022,926 |
| CITADEL ADVISORS LLC | 2.4% | 472,520 | +168% | 0.01% | $9,620,507 |
| Nantahala Capital Management, LLC | 1.9% | 360,419 | -71% | 0.44% | $7,338,131 |
| Connor, Clark & Lunn Investment Management Ltd. | 1.7% | 321,346 | -4.1% | 0.02% | $6,542,605 |
| TWO SIGMA INVESTMENTS, LP | 1.6% | 318,439 | +286% | 0.01% | $6,483,418 |
| HRT FINANCIAL LP | 1.3% | 260,891 | +510% | 0.02% | $5,311,000 |
| Weiss Asset Management LP | 1.3% | 254,063 | 0.08% | $5,172,723 | |
| NORTHERN TRUST CORP | 1.3% | 250,571 | -25% | 0% | $5,101,626 |
| MORGAN STANLEY | 1.2% | 230,492 | -42% | 0% | $4,692,833 |
| MILLENNIUM MANAGEMENT LLC | 1.1% | 220,209 | +313% | 0% | $4,483,455 |
| DEUTSCHE BANK AG\ | 1% | 195,281 | +740% | 0% | $3,975,921 |
| ALGERT GLOBAL LLC | 1% | 193,607 | +305% | 0.06% | $3,942,000 |
| Man Group plc | 0.98% | 190,207 | -1.4% | 0.01% | $3,872,615 |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC | 0.96% | 186,779 | -36% | 0% | $3,802,820 |
| Period | Reported Shares, Excl. Options | Value, Excl. Options | Value Change | Price (Median) | Investors |
|---|---|---|---|---|---|
| 2025 Q4 | 12,944,968 | $263,387,126 | -$79,878,434 | $20.36 | 103 |
| 2025 Q3 | 35,272,212 | $558,014,186 | -$7,638,925 | $15.82 | 151 |
| 2025 Q2 | 35,922,272 | $479,567,957 | +$53,894,426 | $13.35 | 134 |
| 2025 Q1 | 32,796,190 | $334,208,916 | -$101,548,195 | $10.19 | 154 |
| 2024 Q4 | 36,741,918 | $581,640,265 | -$99,583,348 | $15.83 | 159 |
| 2024 Q3 | 34,948,467 | $2,029,993,469 | +$197,656,348 | $58.07 | 162 |
| 2024 Q2 | 31,483,081 | $1,437,735,495 | -$1,704,535 | $45.70 | 150 |
| 2024 Q1 | 31,378,208 | $2,077,197,760 | +$376,189,592 | $66.20 | 144 |
| 2023 Q4 | 25,748,679 | $1,023,986,857 | +$107,389,201 | $39.76 | 119 |
| 2023 Q3 | 22,915,590 | $730,562,303 | +$10,983,703 | $31.88 | 106 |
| 2023 Q2 | 22,423,232 | $900,980,099 | +$13,493,306 | $40.18 | 121 |
| 2023 Q1 | 22,003,238 | $936,983,921 | +$94,494,039 | $42.70 | 128 |
| 2022 Q4 | 19,814,952 | $951,517,038 | +$88,887,412 | $48.02 | 122 |
| 2022 Q3 | 18,166,429 | $683,394,048 | +$33,259,877 | $37.62 | 107 |
| 2022 Q2 | 17,360,328 | $479,673,115 | +$10,253,619 | $27.63 | 101 |
| 2022 Q1 | 16,425,972 | $892,979,574 | +$13,785,386 | $54.38 | 101 |
| 2021 Q4 | 16,155,340 | $944,400,680 | +$68,408,989 | $58.51 | 96 |
| 2021 Q3 | 13,732,777 | $543,300,250 | -$15,835,150 | $39.56 | 86 |
| 2021 Q2 | 14,120,390 | $599,680,759 | -$43,588,395 | $42.47 | 79 |
| 2021 Q1 | 14,412,080 | $887,014,019 | -$122,639,102 | $61.55 | 83 |
| 2020 Q4 | 16,029,747 | $1,129,296,879 | +$301,336,670 | $70.54 | 81 |
| 2020 Q3 | 11,780,724 | $454,579,430 | +$33,779,230 | $38.57 | 49 |
| 2020 Q2 | 10,926,163 | $409,790,602 | +$409,790,602 | $37.51 | 51 |