| Investor | Value | Of portfolio | Shares | Change | Quarter |
|---|---|---|---|---|---|
| Renaissance Technologies | $3.8M | 0.01% | 359.09K | −21% | Q2 2026 |
From each investor's quarterly 13F filing with the SEC: positions at the quarter's end, reported up to 45 days later. All investors
No member of Congress has disclosed a KROS trade since 2025.
From House and Senate STOCK Act reports. Members disclose trades, not holdings, as value ranges up to 45 days later, so amounts are estimates and “last move” is a hint at who still holds it, not a position. All recent congress trades
| Date | Insider | Transaction | Shares | Value |
|---|---|---|---|---|
| Aug 17, 2026 | Newton Charles W.Director | Sale at price 10.30 per share. | 551 | $5.67K |
| Aug 17, 2026 | Lerner Lorena Raquel Ph.D.Officer | Sale at price 10.29 per share. | 3.6K | $36.72K |
| Aug 17, 2026 | Cho EstherOfficer | Sale at price 10.29 per share. | 4.5K | $46.15K |
| Aug 16, 2026 | Bienaime Jean-JacquesDirector | Purchase at price 10.27 per share. | 1K | $10.27K |
| Jul 14, 2026 | Bienaime Jean-JacquesDirector | Purchase at price 10.61 per share. | 1K | $10.61K |
| Jun 30, 2026 | Prener AnneDirector | Stock Award(Grant) at price 0.00 per share. | 13.8K | — |
| Jun 14, 2026 | Bienaime Jean-JacquesDirector | Purchase at price 10.19 per share. | 1K | $10.19K |
| Jun 10, 2026 | Newton Charles W.Director | Sale at price 10.04 per share. | 550 | $5.52K |
| Jun 3, 2026 | Seth AlpnaDirector | Sale at price 10.72 per share. | 2.6K | $28.14K |
| Jun 3, 2026 | Farzan NimaDirector | Sale at price 10.73 per share. | 2.6K | $28.17K |
| Jun 3, 2026 | Knowles JuliusDirector | Sale at price 10.73 per share. | 2.6K | $28.17K |
| Jun 2, 2026 | Bienaime Jean-JacquesDirector | Stock Award(Grant) at price 0.00 per share. | 7.1K | — |
| Jun 2, 2026 | Gray Mary AnnDirector | Stock Award(Grant) at price 0.00 per share. | 7.1K | — |
| Jun 2, 2026 | Seth AlpnaDirector | Stock Award(Grant) at price 0.00 per share. | 7.1K | — |
| Jun 2, 2026 | Farzan NimaDirector | Stock Award(Grant) at price 0.00 per share. | 7.1K | — |
| Jun 2, 2026 | Knowles JuliusDirector | Stock Award(Grant) at price 0.00 per share. | 7.1K | — |
| May 14, 2026 | Bienaime Jean-JacquesDirector | Purchase at price 10.58 per share. | 1K | $10.58K |
| Apr 14, 2026 | Bienaime Jean-JacquesDirector | Purchase at price 11.70 per share. | 1K | $11.70K |
| Apr 1, 2026 | Seehra JasbirChief Executive Officer | Conversion of Exercise of derivative security at price 0.30 per share. | 55K | $16.50K |
| Mar 8, 2026 | Newton Charles W.Director | Stock Award(Grant) at price 0.00 per share. | 13.2K | — |
| Year | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Year |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2026 | -12.0 | -20.8 | -22.2 | 0.7 | 1.2 | -4.9 | -5.9 | 10.0 | 2.9 | -1.5 | −44.8% | ||
| 2025 | -28.0 | -2.8 | -8.0 | 41.7 | -2.0 | -5.7 | 7.3 | 6.2 | 4.0 | -3.8 | 14.8 | 16.5 | +28.6% |
| 2024 | 39.2 | 21.9 | -1.9 | -14.8 | -16.9 | -2.5 | 9.8 | -9.6 | 28.0 | -0.1 | -0.5 | -72.6 | −60.2% |
| 2023 | 22.0 | -9.1 | -19.8 | 3.9 | 7.9 | -16.0 | 4.2 | -16.2 | -9.2 | -10.5 | 6.3 | 31.0 | −17.2% |
| 2022 | -20.7 | 15.8 | 1.3 | -2.5 | -36.2 | -18.3 | 16.1 | 10.3 | 6.4 | 33.8 | -1.0 | -3.7 | −17.9% |
| 2021 | -19.1 | 14.8 | -6.0 | -4.5 | -7.2 | -22.2 | -13.4 | -8.6 | 17.6 | 5.5 | 33.7 | 4.9 | −17.1% |
| 2020 | -2.7 | 30.5 | -14.4 | 66.8 | -28.0 | 44.2 | 36.0 | -6.7 | +138.7% |
Buy / hold / sell counts
Keros Therapeutics, Inc., a clinical-stage biopharmaceutical company, develops and commercializes novel therapeutics to treat patients with disorders linked to dysfunctional signaling of the transforming growth factor-beta family of proteins in the United States. It develops rinvatercept, which acts as a ligand trap and inhibits the biological effects of myostatin and activin A in Phase 1 clinical trials for Duchenne Muscular Dystrophy and Amyotrophic Lateral Sclerosis; and elritercept to target TGF-ß signaling pathways to address diseases that arise from ineffective hematopoiesis in Phase 3 clinical trials for Myelodysplastic Syndromes and Phase 2 clinical trials for Myelofibrosis. The company has collaboration and license agreements with Hansoh (Shanghai) Healthtech Co., Ltd. to develop, manufacture, and commercialize elritercept and licensed products containing elritercept; and Takeda Pharmaceuticals U.S.A., Inc. to develop, manufacture, and commercialize elritercept and certain derivative compounds. Keros Therapeutics, Inc. was incorporated in 2015 and is headquartered in Lexington, Massachusetts.