First Tracks Biotherapeutics, Inc.
TRAX- Exchange
- Nasdaq
- Industry
- Pharmaceutical Preparations
- SEC CIK
- 0002091349
In the last 90 days, First Tracks Biotherapeutics, Inc. insiders filed 0 open-market purchases and 1 sale; 150 institutions reported holding it in 13F filings for Q2 2026, worth $685.8M in total; no superinvestor holds it.
Holders of 5% or more of TRAX
Holders whose latest Schedule 13D or 13G filing reports 5% or more of First Tracks Biotherapeutics, Inc., largest stake first. The change is against the holder's previous filing.
| Holder | Latest form | Stake | Change | First filed | Latest filing | Filing |
|---|---|---|---|---|---|---|
| EcoR1 Capital, LLC | 13G | 9.10%3.17M shares | New | Apr 22, 20261 filing | Apr 22, 2026 | SEC |
| TCG Crossover GP II, LLC | 13G | 8.30%2.90M shares | New | Aug 14, 20261 filing | Aug 14, 2026 | SEC |
| Sirenia Capital Management LP | 13G | 7.20%2.50M shares | New | Aug 14, 20261 filing | Aug 14, 2026 | SEC |
| FMR LLC | 13G | 5.90%2.05M shares | New | Aug 6, 20261 filing | Aug 6, 2026 | SEC |
| Affinity Asset Advisors, LLC | 13G | 5.80%2.03M shares | New | Aug 13, 20261 filing | Aug 13, 2026 | SEC |
| BlackRock, Inc. | 13G | 5.50%1.92M shares | New | Jul 28, 20261 filing | Jul 28, 2026 | SEC |
Stakes are as of each holder's latest filing. Holders whose last filing was in the old format (before December 18, 2024) have no stake on record and are not listed, and after an acquisition or delisting holders usually stop filing.
13D and 13G filings
6 Schedule 13D and 13G filings on First Tracks Biotherapeutics, Inc., newest first, including old-format filings without a stake.
| Filed (ET) | Filer | Form | Stake | Change | Event date | Filing |
|---|---|---|---|---|---|---|
| Aug 14, 20264:22 PM ET | TCG Crossover GP II, LLCand 4 others | 13G | 8.30%2.90M shares | New | Jun 30, 2026 | SEC |
| Aug 14, 20268:33 AM ET | Sirenia Capital Management LPand 1 other | 13G | 7.20%2.50M shares | New | Jun 30, 2026 | SEC |
| Aug 13, 20264:09 PM ET | Affinity Asset Advisors, LLCand 1 other | 13G | 5.80%2.03M shares | New | Jun 30, 2026 | SEC |
| Aug 6, 202610:20 AM ET | FMR LLCand 1 other | 13G | 5.90%2.05M shares | New | Jun 30, 2026 | SEC |
| Jul 28, 20264:44 PM ET | BlackRock, Inc. | 13G | 5.50%1.92M shares | New | Jun 30, 2026 | SEC |
| Apr 22, 20265:09 PM ET | EcoR1 Capital, LLCand 2 others | 13G | 9.10%3.17M shares | New | Apr 20, 2026 | SEC |
Form 144: proposed insider sales
Notices from officers, directors and other affiliates planning to sell First Tracks Biotherapeutics, Inc. shares.
No Form 144 notices for First Tracks Biotherapeutics, Inc. are on file.