TRex Bio, Inc.
TRXB- Exchange
- Nasdaq
- Industry
- Biological Products, (No Diagnostic Substances)
- SEC CIK
- 0002139097
In the last 90 days, TRex Bio, Inc. insiders filed 2 open-market purchases and 0 sales; no institution reported holding it in 13F filings for Q2 2026; no superinvestor holds it.
Open-market trades, last 90 days
Open-market purchases (P) and sales (S) by TRex Bio, Inc. insiders, counted by Form 4 filing. Trades with a flagged price and duplicate filings are left out.
- Open-market buys
- 2 filings
- 2 insiders, $3.80M in total
- Open-market sells
- 0 filings
- Insiders trading
- 2
- Net value
- +$3.80M
- Purchases minus sales
Insider roster
Directors, officers and 10% owners who have filed a Form 4 for TRex Bio, Inc., current and former, most recent filer first. Last reported holding is the position after the last non-derivative trade in their latest filing.
| Name | Title | Last reported holding | Last filing | Filings, past year |
|---|---|---|---|---|
| Alexandria Venture Investments, LLC | 10% Owner | 1,346,501 | Oct 15, 2026 | 1 |
| Marcus Joel S | Director | 41,871 | Oct 13, 2026 | 2 |
| SV Life Sciences Fund VI, L.P. | 10% Owner | 669,939Indirect | Oct 13, 2026 | 1 |
| SVLSF VI, LLC | 10% Owner | 669,939Indirect | Oct 13, 2026 | 1 |
| SV Life Sciences Fund VI (GP), L.P. | 10% Owner | 669,939Indirect | Oct 13, 2026 | 1 |
| Coy Travis Alan | Director | – | Oct 8, 2026 | 1 |
| Ross Michael Jay | Director | – | Oct 8, 2026 | 1 |
| Hirth Peter | Director | – | Oct 8, 2026 | 1 |
| Gallagher Carol Giltner | Director | – | Oct 8, 2026 | 1 |
| Gilmore Julie Ann | Director | – | Oct 8, 2026 | 1 |
Insider trades
Each row adds up one type of transaction in one Form 4 filing. Only open-market purchases (P) and sales (S) are shown by default; use the filters to see grants, option exercises and other codes.
| Filed (ET) | Trade date | Filing delay | Insider | Transaction | Shares | Avg price | Value | Holding change | Flags |
|---|---|---|---|---|---|---|---|---|---|
| Oct 15, 2026 (view filing)4:33 PM ET | Oct 13 | 2 days | Alexandria Venture Investments, LLC10% Owner | PPurchase | +178.6K | $14.00 | +$2.50M | +15.3%1.35M after | |
| Oct 13, 2026 (view filing)4:30 PM ET | Oct 8 | 5 days | SV Life Sciences Fund VI, L.P. and 2 others10% Owner | PPurchase | +92.9K | $14.00 | +$1.30M | New position7.36K after | 2 lots |