TRXB insider trading — TRex Bio, Inc.
Over the last 90 days, insiders at TRex Bio, Inc. (TRXB) made 2 open-market purchases worth $3.80M and 0 open-market sales worth $0, making them net buyers by $3.80M. The largest purchase was by Alexandria Venture Investments, Llc (10% Owner), who bought 178,571 shares for $2.50M on Oct 13, 2026. 2 different insiders bought shares in this period — a cluster buy, which many investors watch closely.
Updated Oct 16, 2026.
Recent TRXB insider transactions
Every Form 4 filed by TRex Bio, Inc. officers, directors and 10% owners in the last 90 days, newest first. P = open-market purchase, S = open-market sale; other codes are awards, option exercises, tax withholding or gifts.
| Trade date | Insider | Role | Type | Ownership | Shares | Price | Value | Filing |
|---|---|---|---|---|---|---|---|---|
| Oct 13, 2026 | Alexandria Venture Investments, Llc | 10% Owner | C · Conversion | Direct | 1,167,930 | — | — | Form 4 |
| Oct 13, 2026 | Alexandria Venture Investments, Llc | 10% Owner | P · Purchase | Direct | 178,571 | $14.00 | $2.50M | Form 4 |
| Oct 13, 2026 | Marcus Joel S | Director | C · Conversion | Direct | 41,871 | — | — | Form 4 |
| Oct 13, 2026 | Svlsf Vi, Llc, Sv Life Sciences Fund Vi (Gp), L.P., Sv Life Sciences Fund Vi, L.P. | 10% Owner | C · Conversion | Indirect | 2,789,593 | — | — | Form 4 |
| Oct 8, 2026 | Svlsf Vi, Llc, Sv Life Sciences Fund Vi (Gp), L.P., Sv Life Sciences Fund Vi, L.P. | 10% Owner | P · Purchase | Indirect | 92,857 | $14.00 | $1.30M | Form 4 |
TRXB insider trading FAQ
Are insiders buying TRXB stock?
Yes. In the last 90 days, TRex Bio, Inc. insiders made 2 open-market purchases totaling $3.80M, and no open-market sales. Purchases with the insider's own money are generally seen as a stronger signal than sales, which happen for many reasons (taxes, diversification, planned 10b5-1 sales).
Who are the insiders trading TRXB?
Recent buyers: Alexandria Venture Investments, Llc, Svlsf Vi, Llc, Sv Life Sciences Fund Vi (Gp), L.P., Sv Life Sciences Fund Vi, L.P..
Where does TRXB insider trading data come from?
Every transaction comes from SEC Form 4 filings on EDGAR. Company officers, directors and 10% owners must file a Form 4 within two business days of buying or selling. InsiderBolt reads these filings directly from the SEC.
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Insider trading data is for informational purposes only and is not investment advice. Filings can be amended; always confirm details on SEC EDGAR.