Key facts
- This page summarizes EcoR1 Capital, LLC's Form 4 filing for First Tracks Biotherapeutics, Inc. (TRAX).
- 1 reported transaction and 0 derivative rows are listed below.
- Accepted by SEC: 22 Apr 2026, 17:07.
EcoR1 Capital, LLC - 20 Apr 2026 Form 4 Insider Report for First Tracks Biotherapeutics, Inc. (TRAX)
- Reporting relationship
- 10%+ Owner
- Issuer ticker
- TRAX
- Reported as of
- 20 Apr 2026
- Net transaction value
- $0
- SEC form
- 4
- Accepted by SEC
- 22 Apr 2026, 17:07:53 UTC
- Prior SEC filing
- 12 Jan 2026
- Next SEC filing
- 11 May 2026
- Source filing
- View source filing
- Reporting owner signature
- /s/ Oleg Nodelman, Manager of EcoR1 Capital, LLC
Source evidence
Original filing metadata and source links for verification.
5 source fields
Reporting owner
1 detail
Key filing fact
EcoR1 Capital, LLC filed Form 4 for First Tracks Biotherapeutics, Inc. (TRAX) on 22 Apr 2026.
Change
- Previous filing in this sequence was filed on 12 Jan 2026.
- Current net transaction value: $0.
Research use
- This tells you what this filing adds before you inspect full transaction and derivative tables.
- You can trace every row back to the original SEC filing document.
Evidence
Filed on Form 4
View source filing
Ownership activity is grounded in SEC Form 4 disclosures.
Reporting Owners (1)
CIK 0001587114
Primary reporting owner
EcoR1 Capital, LLC
- Relationship
- 10%+ Owner
- Address
- 357 TEHAMA STREET #3, SAN FRANCISCO
- Signature
- /s/ Oleg Nodelman, Manager of EcoR1 Capital, LLC
- Signature date
- 22 Apr 2026
Reported non-derivative transactions
Shares, units, or other non-derivative securities reported in this filing.
TRAX
transaction
Common Stock
Sale
- Transaction value
- Shares
- +4,705,575
- Change %
- Price
- $13.81*
- Shares after
- 3,174,519
- Date
- 20 Apr 2026
- Ownership
- See Note
- Footnotes
- F1, F2, F3, F4
* marks a reported price that did not pass the local price check.
Additional SEC filing notes
Filing notes and footnotes
Section 16 status
EcoR1 Capital, LLC is no longer subject to Section 16 filing requirements. Form 4 or Form 5 obligations may still apply in specific circumstances.
Explanation of responses 4 footnotes
Footnote F1
The reporting persons are EcoR1 Capital, LLC ("EcoR1"), Oleg Nodelman and EcoR1 Capital Fund Qualified L.P. ("Qualified Fund"). EcoR1 is the investment adviser and general partner of private funds, including Qualified Fund (collectively, the "Funds"). Mr. Nodelman is the manager and controlling owner of EcoR1. EcoR1 is filing this Form 4 for itself, Mr. Nodelman and Qualified Fund. The filers are filing this Form 4 jointly, but not as a group, and each expressly disclaims membership in a group within the meaning of Rule 13d-5(b) under the Securities Exchange Act of 1934. The Funds hold these securities directly for the benefit of their investors. EcoR1 may be deemed to indirectly beneficially own them as the investment adviser to the Funds. Mr. Nodelman may be deemed to indirectly beneficially own them as the control person of EcoR1. The filers disclaim beneficial ownership of such securities except to the extent of their pecuniary interests therein.
Footnote F2
The Funds sold these share in a private placement described in the Form 8K filed by the Issuer on April 20, 2026.
Footnote F3
Qualified Fund sold 4,420,064 of the securities in this transaction.
Footnote F4
After this transaction, Qualified Fund holds 2,981,908 shares of the Issuer's Common Stock.