Real time Form 13D and 13G transaction reports:
- Schedule 13D must be filed within ten days after a person or an organization acquires beneficial ownership of more than 5% of a voting class of a company's equity securities.
- Due to inconsistent filing format, it is highly recommended that you read the orignal filing form.
- Shares have beem adjusted for stock split.
"Insiders might sell their shares for any number of reasons, but they buy them for only one: they think the price will rise"
- Peter Lynch
What is insider trading>>
- Peter Lynch
What is insider trading>>
| Reported DateTime | Transaction Date | Type | Company Symbol | Filed By Symbol | Shares Owned % Owned | Shares Vs. Prev Report | View |
| 2025-05-15 2:24 pm Purchase | 2025-03-31 | 13G | Tectonic Therapeutic, Inc. TECX | EcoR1 Capital, LLC | 935,121 5.000% | 85,978 (+10.13%) | Filing History |
| 2025-05-15 2:19 pm Sale | 2025-03-31 | 13G | TScan Therapeutics, Inc. TCRX | EcoR1 Capital, LLC | 662,833 1.300% | -4,337,167 (-86.74%) | Filing History |
| 2025-05-15 2:16 pm Sale | 2025-03-31 | 13G | Mersana Therapeutics, Inc. MRSN | EcoR1 Capital, LLC | 0 0.000% | -463,138 (Position Closed) | Filing History |
| 2025-05-15 2:06 pm Purchase | 2025-03-31 | 13G | Kalaris Therapeutics Inc KLRS | EcoR1 Capital, LLC | 201,718 1.100% | 201,718 (New Position) | Filing History |
| 2025-05-15 2:04 pm Purchase | 2025-03-31 | 13G | Immunome, Inc. IMNM | EcoR1 Capital, LLC | 4,079,415 4.700% | 200,000 (+5.16%) | Filing History |
| 2025-05-15 1:56 pm Sale | 2025-03-31 | 13G | Arvinas, Inc. ARVN | EcoR1 Capital, LLC | 0 0.000% | -6,800,493 (Position Closed) | Filing History |
| 2025-05-15 1:53 pm Sale | 2025-03-31 | 13G | Aligos Therapeutics, Inc. ALGS | EcoR1 Capital, LLC | 210,634 3.900% | -145,483 (-40.85%) | Filing History |
| 2025-05-13 7:10 pm Purchase | 2025-05-13 | 13G | iTeos Therapeutics, Inc. ITOS | EcoR1 Capital, LLC | 5,730,000 14.900% | 3,073,360 (+115.69%) | Filing History |
| 2025-05-08 7:43 pm Purchase | 2025-05-01 | 13G | iTeos Therapeutics, Inc. ITOS | EcoR1 Capital, LLC | 2,656,640 6.900% | 1,048,024 (+65.15%) | Filing History |
| 2025-05-06 7:08 pm Sale | 2025-05-02 | 13D | Prothena Corporation plc PRTA | EcoR1 Capital, LLC | 5,304,596 9.900% | -6,279,684 (-54.21%) | Filing History |
| 2025-04-08 4:24 pm Purchase | 2025-04-04 | 13D | Zymeworks Inc. ZYME | EcoR1 Capital, LLC | 17,699,774 25.400% | 841,356 (+4.99%) | Filing History |
| 2025-03-17 7:50 pm Purchase | 2025-03-13 | 13D | Zymeworks Inc. ZYME | EcoR1 Capital, LLC | 16,858,418 24.200% | 1,138,257 (+7.24%) | Filing History |
| 2025-02-18 6:25 pm Purchase | 2025-02-17 | 13D | Zymeworks Inc. ZYME | EcoR1 Capital, LLC | 15,720,161 22.800% | 309,083 (+2.01%) | Filing History |
| 2025-02-14 1:17 pm Purchase | 2024-12-31 | 13G | AlloVir, Inc. ALVR | EcoR1 Capital, LLC | 408,688 8.100% | 408,688 (New Position) | Filing History |
| 2025-02-14 1:04 pm Purchase | 2024-12-31 | 13G | Eton Pharmaceuticals, Inc. ETON | EcoR1 Capital, LLC | 1,981,003 7.700% | 583,334 (+41.74%) | Filing History |
| 2025-02-14 12:47 pm Sale | 2024-12-31 | 13G | Atea Pharmaceuticals, Inc. AVIR | EcoR1 Capital, LLC | 3,341,653 4.000% | -2,100,243 (-38.59%) | Filing History |
| 2025-02-14 12:33 pm Sale | 2024-12-31 | 13G | Tango Therapeutics, Inc. TNGX | EcoR1 Capital, LLC | 10,630,736 9.900% | -2,700,000 (-20.25%) | Filing History |
| 2025-02-14 12:26 pm Sale | 2024-12-31 | 13G | HOOKIPA Pharma Inc. HOOK | EcoR1 Capital, LLC | 388,861 4.000% | -182,866 (-31.98%) | Filing History |
| 2025-02-14 12:11 pm Sale | 2024-12-31 | 13G | Whitehawk Therapeutics Inc WHWK | EcoR1 Capital, LLC | 345,253 1.400% | -1,500,000 (-81.29%) | Filing History |
| 2025-01-13 7:18 pm Purchase | 2025-01-10 | 13D | Zymeworks Inc. ZYME | EcoR1 Capital, LLC | 15,411,078 22.400% | 718,797 (+4.89%) | Filing History |