BBTX insider trading — Bambusa Therapeutics, Inc.
Over the last 90 days, insiders at Bambusa Therapeutics, Inc. (BBTX) made 3 open-market purchases worth $52.64M and 0 open-market sales worth $0, making them net buyers by $52.64M. The largest purchase was by Ra Capital Management, L.P., Ra Capital Healthcare Fund Lp, Ra Capital Nexus Fund Iii, L.P., Kolchinsky Peter, Shah Rajeev M. (Director), who bought 2,500,000 shares for $40.00M on Nov 2, 2026. 2 different insiders bought shares in this period — a cluster buy, which many investors watch closely.
Updated Nov 5, 2026.
Recent BBTX insider transactions
Every Form 4 filed by Bambusa Therapeutics, 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 |
|---|---|---|---|---|---|---|---|---|
| Nov 2, 2026 | Ra Capital Management, L.P., Ra Capital Healthcare Fund Lp, Ra Capital Nexus Fund Iii, L.P., Kolchinsky Peter, Shah Rajeev M. | Director | C · Conversion | Indirect | 4,475,938 | — | — | Form 4 |
| Nov 2, 2026 | Ra Capital Management, L.P., Ra Capital Healthcare Fund Lp, Ra Capital Nexus Fund Iii, L.P., Kolchinsky Peter, Shah Rajeev M. | Director | P · Purchase | Indirect | 2,500,000 | $16.00 | $40.00M | Form 4 |
| Oct 30, 2026 | Ra Capital Management, L.P., Ra Capital Healthcare Fund Lp, Ra Capital Nexus Fund Iii, L.P., Kolchinsky Peter, Shah Rajeev M. | Director | P · Purchase | Indirect | 453,820 | $14.63 | $6.64M | Form 4 |
| Nov 2, 2026 | Salvia Investment Gmbh | 10% Owner | C · Conversion | Direct | 4,769,701 | — | — | Form 4 |
| Nov 2, 2026 | Salvia Investment Gmbh | 10% Owner | P · Purchase | Direct | 375,000 | $16.00 | $6.00M | Form 4 |
| Nov 2, 2026 | Jeggle Helmut Wolfgang | Director | C · Conversion | Indirect | 4,769,701 | — | — | Form 4 |
| Nov 2, 2026 | Jeggle Helmut Wolfgang | Director | P · Purchase | Indirect | 375,000 | $16.00 | $6.00M | Form 4 |
| Nov 2, 2026 | Xu Shanshan, Mineng, Inc. | See remarks, 10% Owner | C · Conversion | Indirect | 163,596 | — | — | Form 4 |
BBTX insider trading FAQ
Are insiders buying BBTX stock?
Yes. In the last 90 days, Bambusa Therapeutics, Inc. insiders made 3 open-market purchases totaling $52.64M, 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 BBTX?
Recent buyers: Jeggle Helmut Wolfgang, Ra Capital Management, L.P., Ra Capital Healthcare Fund Lp, Ra Capital Nexus Fund Iii, L.P., Kolchinsky Peter, Shah Rajeev M..
Where does BBTX 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.
More stocks with insider activity
Insider trading data is for informational purposes only and is not investment advice. Filings can be amended; always confirm details on SEC EDGAR.