TRXB insider filings
TRex Bio, Inc. — 23 most recent insider filings (SEC Forms 3/4/5) from EDGAR, normalized by FilingPulse. Latest filing: 2026-10-15. Screen TRXB transaction legs live →
Insider transaction summary — last 90 days
2026-07-29 to 2026-10-27, from the filings listed below: 23 insider filings (Forms 3/4/5). Counts and totals are arithmetic on values as filed — descriptive data, not a recommendation.
- Open-market purchases (code P, non-derivative): 3 legs across 2 filings by 4 insiders — 271,428 shares, $3,799,992 total (shares × price as filed).
- Open-market sales (code S, non-derivative): none reported.
- Other reported legs (grants, option exercises, tax withholding, gifts, derivative-security transactions, …): 21.
- Largest priced transaction: purchase of 178,571 shares @ $14.00 ($2,499,994) by Alexandria Venture Investments, LLC, filed 2026-10-15.
By insider — same window
Open-market purchase/sale legs on non-derivative securities, grouped by the filing's reporting owner(s); joint filings appear once. Dollar totals cover priced legs only (shares × price as filed). Ordered by priced transaction value, largest first.
| Insider | Filings | Purchases (P) | Sales (S) | Other legs |
|---|---|---|---|---|
| Alexandria Venture Investments, LLC — 10% owner | 2 | 1 leg · 178,571 sh · $2,499,994 | — | 3 |
| SVLSF VI, LLC — 10% owner & SV Life Sciences Fund VI (GP), L.P. — 10% owner & SV Life Sciences Fund VI, L.P. — 10% owner | 2 | 2 legs · 92,857 sh · $1,299,998 | — | 10 |
| MARCUS JOEL S — Director | 3 | — | — | 3 |
| Coy Travis Alan — Director | 2 | — | — | 1 |
| Gallagher Carol Giltner — Director | 2 | — | — | 1 |
| Gilmore Julie Ann — Director | 2 | — | — | 1 |
| Hirth Peter — Director | 2 | — | — | 1 |
| Ross Michael Jay — Director | 2 | — | — | 1 |
| Berner Laura — Chief Operating Officer | 1 | — | — | — |
| ELI LILLY & Co — 10% owner | 1 | — | — | — |
+4 more insiders in the window, not shown — every filing appears in the table below.
Recent insider filings — TRex Bio, Inc.
| Filed | Form | Insider | Reported transactions | Source |
|---|---|---|---|---|
| 2026-10-15 | 4 | Alexandria Venture Investments, LLC — 10% owner | Conversion (C): 1,167,930 · Purchase (P): 178,571 @ $14 · Conversion (C): 1,033,541 (derivative) @ $0 · Conversion (C): 3,480,387 (derivative) @ $0 | EDGAR |
| 2026-10-13 | 4 | MARCUS JOEL S — Director | Conversion (C): 41,871 · Conversion (C): 161,828 (derivative) @ $0 | EDGAR |
| 2026-10-13 | 4 | SVLSF VI, LLC — 10% owner SV Life Sciences Fund VI (GP), L.P. — 10% owner SV Life Sciences Fund VI, L.P. — 10% owner | Purchase (P): 89,783 @ $14 · Conversion (C): 1,574,074 @ $0 · Conversion (C): 475,411 @ $0 · Purchase (P): 3,074 @ $14 · Conversion (C): 53,892 @ $0 · Conversion (C): 16,277 @ $0 · +6 more | EDGAR |
| 2026-10-08 | 3 | SVLSF VI, LLC — 10% owner SV Life Sciences Fund VI (GP), L.P. — 10% owner SV Life Sciences Fund VI, L.P. — 10% owner | Holdings only — no transactions reported | EDGAR |
| 2026-10-08 | 4 | Coy Travis Alan — Director | Grant/award (A): 17,500 (derivative) @ $0 | EDGAR |
| 2026-10-08 | 4 | MARCUS JOEL S — Director | Grant/award (A): 17,500 (derivative) @ $0 | EDGAR |
| 2026-10-08 | 4 | Ross Michael Jay — Director | Grant/award (A): 17,500 (derivative) @ $0 | EDGAR |
| 2026-10-08 | 4 | Gilmore Julie Ann — Director | Grant/award (A): 17,500 (derivative) @ $0 | EDGAR |
| 2026-10-08 | 4 | Gallagher Carol Giltner — Director | Grant/award (A): 17,500 (derivative) @ $0 | EDGAR |
| 2026-10-08 | 4 | Hirth Peter — Director | Grant/award (A): 17,500 (derivative) @ $0 | EDGAR |
| 2026-10-08 | 3 | Berner Laura — Chief Operating Officer | Holdings only — no transactions reported | EDGAR |
| 2026-10-08 | 3 | Ross Michael Jay — Director | Holdings only — no transactions reported | EDGAR |
| 2026-10-08 | 3 | Hirth Peter — Director | Holdings only — no transactions reported | EDGAR |
| 2026-10-08 | 3 | Gilmore Julie Ann — Director | Holdings only — no transactions reported | EDGAR |
| 2026-10-08 | 3 | Coy Travis Alan — Director | Holdings only — no transactions reported | EDGAR |
| 2026-10-08 | 3 | Hants Brandon — Chief Financial Officer | Holdings only — no transactions reported | EDGAR |
| 2026-10-08 | 3 | Erwin Marion Johnston Jr. — Chief Executive Officer, Director | Holdings only — no transactions reported | EDGAR |
| 2026-10-08 | 3 | Zarrin Ali — Chief Scientific Officer | Holdings only — no transactions reported | EDGAR |
| 2026-10-08 | 3 | Kelman Ariella — Chief Medical Officer | Holdings only — no transactions reported | EDGAR |
| 2026-10-08 | 3 | MARCUS JOEL S — Director | Holdings only — no transactions reported | EDGAR |
| 2026-10-08 | 3 | Gallagher Carol Giltner — Director | Holdings only — no transactions reported | EDGAR |
| 2026-10-08 | 3 | ELI LILLY & Co — 10% owner | Holdings only — no transactions reported | EDGAR |
| 2026-10-08 | 3 | Alexandria Venture Investments, LLC — 10% owner | Holdings only — no transactions reported | EDGAR |
Recent 8-K events — TRex Bio, Inc.
Items classified from EDGAR index headers. Browse recent 8-K filings market-wide, by item code →
| Filed | Form | Items reported | Source |
|---|---|---|---|
| 2026-10-13 | 8-K | 5.03 — Amendments to Articles of Incorporation or Bylaws; Change in Fiscal Year 9.01 — Financial Statements and Exhibits | EDGAR |
Registration filings — TRex Bio, Inc.
Securities Act registration lifecycles tracked for this issuer (live-forward since 2026-08-01), threaded by SEC file number.
- SEC file 333-299018 (S-1) — latest: Final prospectus (424B4), filed 2026-10-09
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