LYEL insider trading — Lyell Immunopharma, Inc.
Over the last 90 days, insiders at Lyell Immunopharma, Inc. (LYEL) made 0 open-market purchases worth $0 and 9 open-market sales worth $215K, making them net sellers by $215K. The largest sale was by Seely Lynn (President and CEO), who sold 9,589 shares for $149K on Aug 21, 2026.
Updated Oct 16, 2026.
Recent LYEL insider transactions
Every Form 4 filed by Lyell Immunopharma, 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 12, 2026 | Aguirre Jarrad Mattieu | Chief Medical Officer | S · Sale | Direct | 422 | $8.63 | $4K | Form 4 |
| Sep 10, 2026 | Shook David | Chief Medical Officer | S · Sale | Direct | 500 | $12.70 | $6K | Form 4 |
| Aug 21, 2026 | Seely Lynn | President and CEO | S · Sale | Direct | 9,589 | $15.54 | $149K | Form 4 |
| Aug 21, 2026 | Hill Stephen J. | Chief Operating Officer | S · Sale | Direct | 989 | $15.54 | $15K | Form 4 |
| Aug 21, 2026 | Lee Gary K. | Chief Scientific Officer | S · Sale | Direct | 1,457 | $15.54 | $23K | Form 4 |
| Aug 10, 2026 | Bulis Veronica Sanchez | VP, Corporate Controller | S · Sale | Direct | 621 | $14.34 | $9K | Form 4 |
| Aug 10, 2026 | Lee Gary K. | Chief Scientific Officer | S · Sale | Direct | 131 | $14.34 | $2K | Form 4 |
| Aug 10, 2026 | Hill Stephen J. | Chief Operating Officer | S · Sale | Direct | 89 | $14.34 | $1K | Form 4 |
| Aug 10, 2026 | Seely Lynn | President and CEO | S · Sale | Direct | 390 | $14.34 | $6K | Form 4 |
| Jul 27, 2026 | Innovative Cellular Therapeutics Holdings Ltd | 10% Owner | J · Other | Direct | 82,500 | — | — | Form 4 |
| Jul 17, 2026 | Innovative Cellular Therapeutics Holdings Ltd | 10% Owner | S · Sale · 10b5-1 | Direct | 10 | $13.70 | $137 | Form 4 |
LYEL insider trading FAQ
Are insiders buying LYEL stock?
Not on the open market. In the last 90 days, Lyell Immunopharma, Inc. insiders made no open-market purchases, and 9 open-market sales totaling $215K. 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 LYEL?
Recent sellers: Aguirre Jarrad Mattieu, Bulis Veronica Sanchez, Hill Stephen J., Lee Gary K., Seely Lynn, Shook David.
Where does LYEL 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.