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Insider · CIK 0001587114

EcoR1 Capital, LLC

CIK 0001587114 Name as filed on the most recent filing

Filed as EcoR1 Capital, LLC (54)

133 transaction lines · from 54 filings · filed 2014-03-28 to 2026-05-11 The span is the filing dates this catalog holds, not the entity's full filing history. Absence here is not evidence of absence at the SEC.

How this page attributes a trade

A line appears here when the filing that carries it names this CIK as a reporting owner, not only when the parser picked this CIK as the line's primary owner. That is why a joint filing appears on both owners' pages rather than vanishing from the second one. The catalog never merges two CIKs into one person and never splits one CIK into two: identity here is the SEC's own identifier and nothing else.

01

Issuers this insider has filed against

Ordered by last-seen filing date, newest first. Roles are as filed on the Form 4 and are not normalised.

Fault

This container could not be filled from the store. It is showing nothing because a read failed, not because no insider filed: those are different facts and this catalog will not let one stand in for the other. The last ingest the store recorded was 2026-08-20 05:22 UTC.

No issuer is recorded

The catalog holds no filing linking this CIK to an issuer.

02

Transactions

Every stored Form 4 line naming this reporting owner, newest transaction date first. Each row links to the filing it came from.

68 transactions · Newest transaction date first, id breaking the tie.

Fault

This container could not be filled from the store. It is showing nothing because a read failed, not because no insider filed: those are different facts and this catalog will not let one stand in for the other. The last ingest the store recorded was 2026-08-20 05:22 UTC.

Transactions filed by this insider
Direction Date Issuer Code Shares Price Value USD Filing
2026-05-07 Atara Biotherapeutics, Inc.
ATRA 		P, Open-market purchase 507,407 acquired 9.35 4,744,255.45 Form 4, filing 0000935836-26-000239
2026-04-20 First Tracks Biotherapeutics, Inc.
TRAX 		S, Open-market sale 4,705,575 acquired 13.81 64,999,989.70 Form 4, filing 0000935836-26-000208
2026-01-12 Aktis Oncology, Inc.
AKTS 		P, Open-market purchase 2,077,779 acquired 18.00 37,400,022.00 Form 4, filing 0000935836-26-000031
2026-01-12 Aktis Oncology, Inc.
AKTS 		P, Open-market purchase 144,443 acquired 18.00 2,599,974.00 Form 4, filing 0000935836-26-000031
2025-07-30 Adaptimmune Therapeutics PLC
ADAP 		S, Open-market sale 27,433,338 disposed 0.10 2,800,943.81 Form 4, filing 0000935836-25-000476
2025-07-29 Adaptimmune Therapeutics PLC
ADAP 		S, Open-market sale 2,687,460 disposed 0.10 271,970.95 Form 4, filing 0000935836-25-000476
2025-07-28 Adaptimmune Therapeutics PLC
ADAP 		S, Open-market sale 33,931,740 disposed 0.11 3,817,320.75 Form 4, filing 0000935836-25-000476
2025-05-19 Zymeworks Inc.
ZYME 		P, Open-market purchase 5,919 acquired 11.78 69,738.25 Form 4, filing 0000935836-25-000389
2025-05-15 Zymeworks Inc.
ZYME 		P, Open-market purchase 49,502 acquired 11.43 565,847.46 Form 4, filing 0000935836-25-000389
2025-05-15 iTeos Therapeutics, Inc.
ITOS 		P, Open-market purchase 3,300,000 acquired 8.00 26,400,000.00 Form 4, filing 0000935836-25-000384
2025-05-14 iTeos Therapeutics, Inc.
ITOS 		P, Open-market purchase 1,658,978 acquired 7.41 12,285,561.58 Form 4, filing 0000935836-25-000384
2025-05-06 Prothena Corp Public Ltd Co
PRTA 		S, Open-market sale 1,984,053 disposed 7.64 15,164,712.29 Form 4, filing 0000935836-25-000309
2025-05-05 Prothena Corp Public Ltd Co
PRTA 		S, Open-market sale 977,693 disposed 8.11 7,930,165.69 Form 4, filing 0000935836-25-000309
2025-05-02 Prothena Corp Public Ltd Co
PRTA 		S, Open-market sale 3,317,938 disposed 8.36 27,744,929.35 Form 4, filing 0000935836-25-000309
2025-04-17 Zymeworks Inc.
ZYME 		P, Open-market purchase 54,760 acquired 11.52 630,818.77 Form 4, filing 0000935836-25-000292
2025-04-16 Zymeworks Inc.
ZYME 		P, Open-market purchase 73,953 acquired 11.16 825,589.11 Form 4, filing 0000935836-25-000292
2025-04-04 Zymeworks Inc.
ZYME 		P, Open-market purchase 196,438 acquired 11.17 2,193,799.94 Form 4, filing 0000935836-25-000266
2025-04-03 Zymeworks Inc.
ZYME 		P, Open-market purchase 120,770 acquired 11.84 1,430,170.42 Form 4, filing 0000935836-25-000266
2025-04-02 Zymeworks Inc.
ZYME 		P, Open-market purchase 74,360 acquired 11.85 881,017.28 Form 4, filing 0000935836-25-000259
2025-04-01 Zymeworks Inc.
ZYME 		P, Open-market purchase 48,658 acquired 11.60 564,646.90 Form 4, filing 0000935836-25-000259
2025-03-31 Zymeworks Inc.
ZYME 		P, Open-market purchase 4,397 acquired 11.75 51,658.15 Form 4, filing 0000935836-25-000259
2025-03-26 Zymeworks Inc.
ZYME 		P, Open-market purchase 43,848 acquired 12.24 536,857.37 Form 4, filing 0000935836-25-000253
2025-03-25 Zymeworks Inc.
ZYME 		P, Open-market purchase 53,501 acquired 12.91 690,451.81 Form 4, filing 0000935836-25-000253
2025-03-24 Zymeworks Inc.
ZYME 		P, Open-market purchase 22,689 acquired 13.08 296,846.99 Form 4, filing 0000935836-25-000245
2025-03-21 Zymeworks Inc.
ZYME 		P, Open-market purchase 31,033 acquired 12.78 396,517.95 Form 4, filing 0000935836-25-000245
2025-03-20 Zymeworks Inc.
ZYME 		P, Open-market purchase 73,476 acquired 12.93 949,883.03 Form 4, filing 0000935836-25-000245
2025-03-19 Zymeworks Inc.
ZYME 		P, Open-market purchase 58,306 acquired 12.64 737,232.73 Form 4, filing 0000935836-25-000239
2025-03-18 Zymeworks Inc.
ZYME 		P, Open-market purchase 113,880 acquired 12.65 1,440,855.31 Form 4, filing 0000935836-25-000239
2025-03-17 Zymeworks Inc.
ZYME 		P, Open-market purchase 56,277 acquired 12.23 688,464.68 Form 4, filing 0000935836-25-000239
2025-03-13 Zymeworks Inc.
ZYME 		P, Open-market purchase 468,356 acquired 12.48 5,847,237.32 Form 4, filing 0000935836-25-000225
2025-03-12 Zymeworks Inc.
ZYME 		P, Open-market purchase 292,934 acquired 12.25 3,587,826.34 Form 4, filing 0000935836-25-000225
2025-03-11 Zymeworks Inc.
ZYME 		P, Open-market purchase 320,690 acquired 11.49 3,685,850.52 Form 4, filing 0000935836-25-000225
2025-01-17 Zymeworks Inc.
ZYME 		P, Open-market purchase 19,748 acquired 13.87 273,997.58 Form 4, filing 0000935836-25-000074
2025-01-16 Zymeworks Inc.
ZYME 		P, Open-market purchase 121,681 acquired 13.88 1,689,540.68 Form 4, filing 0000935836-25-000074
2025-01-15 Zymeworks Inc.
ZYME 		P, Open-market purchase 39,029 acquired 14.01 546,671.40 Form 4, filing 0000935836-25-000067
2025-01-14 Zymeworks Inc.
ZYME 		P, Open-market purchase 54,500 acquired 13.56 739,265.25 Form 4, filing 0000935836-25-000067
2025-01-13 Zymeworks Inc.
ZYME 		P, Open-market purchase 74,125 acquired 13.39 992,874.72 Form 4, filing 0000935836-25-000067
2025-01-10 Zymeworks Inc.
ZYME 		P, Open-market purchase 204,098 acquired 13.13 2,678,990.35 Form 4, filing 0000935836-25-000048
2025-01-08 Zymeworks Inc.
ZYME 		P, Open-market purchase 21,021 acquired 14.07 295,828.53 Form 4, filing 0000935836-25-000048
2025-01-02 Anaptysbio, Inc
ANAB 		P, Open-market purchase 6,646 acquired 12.95 86,069.69 Form 4, filing 0000935836-25-000008
2025-01-02 Zymeworks Inc.
ZYME 		P, Open-market purchase 157,880 acquired 14.78 2,333,403.25 Form 4, filing 0000935836-25-000007
2024-12-31 Anaptysbio, Inc
ANAB 		P, Open-market purchase 13,268 acquired 12.93 171,512.78 Form 4, filing 0000935836-25-000008
2024-12-31 Zymeworks Inc.
ZYME 		P, Open-market purchase 146,501 acquired 14.57 2,134,446.32 Form 4, filing 0000935836-25-000007
2024-12-30 Anaptysbio, Inc
ANAB 		P, Open-market purchase 65,184 acquired 12.92 842,059.95 Form 4, filing 0000935836-25-000008
2024-12-30 Zymeworks Inc.
ZYME 		P, Open-market purchase 58,988 acquired 14.47 853,326.31 Form 4, filing 0000935836-25-000007
2024-12-27 Zymeworks Inc.
ZYME 		P, Open-market purchase 101,659 acquired 14.49 1,473,181.23 Form 4, filing 0000935836-24-000785
2024-12-26 Zymeworks Inc.
ZYME 		P, Open-market purchase 16,692 acquired 14.38 240,037.64 Form 4, filing 0000935836-24-000785
2024-12-24 Zymeworks Inc.
ZYME 		P, Open-market purchase 11,958 acquired 14.12 168,895.99 Form 4, filing 0000935836-24-000785
2024-12-23 Zymeworks Inc.
ZYME 		P, Open-market purchase 251,502 acquired 14.25 3,584,104.70 Form 4, filing 0000935836-24-000780
2024-12-20 Zymeworks Inc.
ZYME 		P, Open-market purchase 704,488 acquired 14.08 9,917,500.27 Form 4, filing 0000935836-24-000780

This column is intentionally blank

No transaction line is stored for this reporting owner, though the catalog holds filings naming them. That happens when the filings report only holdings or only positions the store does not carry, and when a parse failed; each filing page states its own parse status.

Search the catalog
Codes on this page
P, Open-market purchase
Open-market purchase
S, Open-market sale
Open-market sale

Every value is as reported on the Form 4. A price the filing did not report is marked Not reported and no value is computed from it. Codes outside the open market, drawn in grey behind a dashed rule, are compensation and administrative machinery rather than a decision to trade at the prevailing price.

What this insider's stored lines contain

Exact counts over every stored line for this entity. This is a statement of composition, not a filter: the only filter this page offers is the open-market one above, because that is the only one an index serves today.

  • Open-market purchase 47
  • Open-market sale 21
  • Option exercise 0
  • Grant or award 0
  • Tax withholding 0
  • Disposition to the issuer 0
  • In-the-money option exercise 0

How to cite this page

ebomi catalog. EcoR1 Capital, LLC, insider transactions. Retrieved 2026-08-20 from https://ebomi.com/insider/0001587114

Balogh, A. Insider trading. Scientific Data 10, 237 (2023) doi:10.1038/s41597-023-02147-6

This page as JSON The JSON twin is shaped by the same read model as this page, so the two cannot disagree. Its envelope carries the canonical URL, the retrieval time, the coverage claim, and the licence statement.