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 |
| 2025-06-27 6:14 pm Purchase | 2025-06-26 | 13D | Zymeworks Inc. ZYME | EcoR1 Capital, LLC | 22,970,388 30.700% | 5,270,614 (+29.78%) | Filing History |
| 2025-05-29 9:08 pm Sale | 2025-05-27 | 13D | Prothena Corporation plc PRTA | EcoR1 Capital, LLC | 0 0.000% | -5,304,596 (Position Closed) | Filing History |
| 2025-05-19 6:33 pm Purchase | 2025-05-15 | 13D | Galapagos N.V. GLPG | EcoR1 Capital, LLC | 7,803,202 11.840% | 709,153 (+10.00%) | Filing History |
| 2025-05-16 7:22 pm Purchase | 2025-05-15 | 13D | iTeos Therapeutics, Inc. ITOS | EcoR1 Capital, LLC | 10,688,978 27.900% | 4,958,978 (+86.54%) | Filing History |
| 2025-05-15 2:28 pm Sale | 2025-03-31 | 13G | Third Harmonic Bio, Inc. THRD | EcoR1 Capital, LLC | 0 0.000% | -3,182,444 (Position Closed) | Filing History |
| 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% | -11,578,447 (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 |