SEPN insider trading — Septerna, Inc.
Over the last 90 days, insiders at Septerna, Inc. (SEPN) made 0 open-market purchases worth $0 and 1 open-market sale worth $63.45M, making them net sellers by $63.45M. The largest sale 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 sold 1,493,000 shares for $63.45M on Aug 12, 2026.
Updated Oct 16, 2026.
Recent SEPN insider transactions
Every Form 4 filed by Septerna, 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 |
|---|---|---|---|---|---|---|---|---|
| Sep 1, 2026 | Long Daniel D. | SVP, Drug Discovery | M · Option exercise · 10b5-1 | Direct | 3,333 | $2.76 | $9K | Form 4 |
| Sep 1, 2026 | Long Daniel D. | SVP, Drug Discovery | S · Sale · 10b5-1 | Direct | 3,333 | $37.83 | $126K | Form 4 |
| Aug 12, 2026 | Third Rock Ventures V, L.P., Third Rock Ventures Gp V, Lp, Trv Gp V, Llc, Third Rock Ventures Vi, L.P., Third Rock Ventures Gp Vi, L.P., Trv Gp Vi, Llc | 10% Owner | S · Sale · 10b5-1 | Direct | 147,200 | $50.27 | $7.40M | Form 4 |
| Aug 12, 2026 | Ra Capital Management, L.P., Ra Capital Healthcare Fund Lp, Ra Capital Nexus Fund Iii, L.P., Kolchinsky Peter, Shah Rajeev M. | Director | S · Sale | Indirect | 1,493,000 | $42.50 | $63.45M | Form 4 |
| Aug 11, 2026 | Bhatt Elizabeth | President and COO | M · Option exercise · 10b5-1 | Direct | 25,000 | $5.79 | $145K | Form 4 |
| Aug 11, 2026 | Bhatt Elizabeth | President and COO | S · Sale · 10b5-1 | Direct | 25,000 | $44.00 | $1.10M | Form 4 |
| Aug 3, 2026 | Long Daniel D. | SVP, Drug Discovery | M · Option exercise · 10b5-1 | Direct | 3,334 | $2.76 | $9K | Form 4 |
| Aug 3, 2026 | Long Daniel D. | SVP, Drug Discovery | S · Sale · 10b5-1 | Direct | 3,334 | $34.47 | $115K | Form 4 |
SEPN insider trading FAQ
Are insiders buying SEPN stock?
Not on the open market. In the last 90 days, Septerna, Inc. insiders made no open-market purchases, and 1 open-market sale totaling $63.45M. 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 SEPN?
Recent sellers: Ra Capital Management, L.P., Ra Capital Healthcare Fund Lp, Ra Capital Nexus Fund Iii, L.P., Kolchinsky Peter, Shah Rajeev M..
Where does SEPN 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.