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 |
| 2026-05-15 2:26 pm Sale | 2026-03-31 | 13G | IBIO INC PAR $0.001 IBIO | EcoR1 Capital LLC | 1,583,000 4.600% | -645,000 (-28.95%) | Filing History |
| 2026-05-15 2:25 pm Sale | 2026-03-31 | 13G | MEREO BIOPHARMA GROUP PLC ADR MREO | EcoR1 Capital LLC | 66,844,275 8.400% | -7,655,725 (-10.28%) | Filing History |
| 2026-05-15 2:24 pm Sale | 2026-03-31 | 13G | XENCOR INC XNCR | EcoR1 Capital LLC | 2,183,000 2.900% | -2,457,000 (-52.95%) | Filing History |
| 2026-05-15 2:16 pm Sale | 2026-03-31 | 13G | VOYAGER THERAPEUTICS INC VYGR | EcoR1 Capital LLC | 0 0.000% | -4,002,847 (Position Closed) | Filing History |
| 2026-05-07 7:26 pm Purchase | 2026-05-07 | 13G | ATARA BIOTHERAPEUTICS INC ATRA | EcoR1 Capital LLC | 1,552,000 17.400% | 836,147 (+116.80%) | Filing History |
| 2026-04-22 5:09 pm Purchase | 2026-04-20 | 13G | FIRST TRACKS BIOTHERAPEUTICS I TRAX | EcoR1 Capital LLC | 3,174,519 9.100% | 3,174,519 (New Position) | Filing History |
| 2026-02-17 6:34 pm Sale | 2025-12-31 | 13G | UNIQURE N V QURE | EcoR1 Capital LLC | 0 0.000% | -3,632,087 (Position Closed) | Filing History |
| 2026-02-17 6:29 pm Sale | 2025-12-31 | 13G | TANGO THERAPEUTICS INC TNGX | EcoR1 Capital LLC | 0 0.000% | -10,630,736 (Position Closed) | Filing History |
| 2026-02-17 6:24 pm Sale | 2025-12-31 | 13G | XENCOR INC XNCR | EcoR1 Capital LLC | 4,640,000 6.400% | -2,079,304 (-30.95%) | Filing History |
| 2026-02-17 6:21 pm Sale | 2025-12-31 | 13G | VOYAGER THERAPEUTICS INC VYGR | EcoR1 Capital LLC | 4,002,847 6.800% | -789 (-0.02%) | Filing History |
| 2026-01-20 2:01 pm Purchase | 2026-01-12 | 13D | AKTIS ONCOLOGY INC AKTS | EcoR1 Capital LLC | 4,862,335 9.100% | 4,862,335 (New Position) | Filing History |
| 2026-01-09 5:24 pm Purchase | 2026-01-02 | 13G | MEREO BIOPHARMA GROUP PLC ADR MREO | EcoR1 Capital LLC | 74,500,000 9.400% | 74,500,000 (New Position) | Filing History |
| 2025-12-17 5:42 pm Purchase | 2025-12-10 | 13G | IBIO INC PAR $0.001 IBIO | EcoR1 Capital LLC | 2,228,000 9.900% | 2,228,000 (New Position) | Filing History |
| 2025-11-19 5:39 pm Unchanged | 2025-11-16 | 13D | ZYMEWORKS INC ZYME | EcoR1 Capital LLC | 22,970,388 30.700% | 0 (Unchanged) | Filing History |
| 2025-11-14 4:19 pm Sale | 2025-09-30 | 13G | HILLEVAX INC HLVX | EcoR1 Capital LLC | 0 0.000% | -2,892,000 (Position Closed) | Filing History |
| 2025-11-14 4:17 pm Sale | 2025-09-30 | 13G | TECTONIC THERAPEUTIC INC TECX | EcoR1 Capital LLC | 0 0.000% | -935,121 (Position Closed) | Filing History |
| 2025-11-14 4:05 pm Purchase | 2025-09-30 | 13G | ATARA BIOTHERAPEUTICS INC ATRA | EcoR1 Capital LLC | 715,853 9.900% | 222,390 (+45.07%) | Filing History |
| 2025-11-14 3:47 pm Sale | 2025-09-30 | 13G | VOYAGER THERAPEUTICS INC VYGR | EcoR1 Capital LLC | 4,003,636 6.800% | -1,614,083 (-28.73%) | Filing History |
| 2025-11-14 3:46 pm Purchase | 2025-09-30 | 13G | NEUROGENE INC NGNE | EcoR1 Capital LLC | 1,442,902 9.900% | 160,734 (+12.54%) | Filing History |
| 2025-11-14 3:45 pm Sale | 2025-09-30 | 13G | APELLIS PHARMACEUTICALS INC CO APLS | EcoR1 Capital LLC | 3,447,156 2.700% | -7,725,912 (-69.15%) | Filing History |