LYEL insider trades & Congress trades
Lyell Immunopharma, Inc.: public insider filings and Congress disclosures, in one place.
Bourse has recorded 11 open-market insider transactions in Lyell Immunopharma, Inc. (LYEL) (2 purchases with code P and 9 sales with code S), the most recent on November 4, 2026.
In the last 90 days: 2 purchases by 2 insiders ($50.0M) and 9 sales by 6 ($215K).
Insider transactions
SEC Form 4, open-market purchases (P) and sales (S) only. Awards, option exercises and tax withholding are excluded. “After” shows the stock’s return over the month following the trade, where available.
| Date | Insider | Role | Type | Shares | Price | Value | After 1M |
|---|---|---|---|---|---|---|---|
| Nov 4, 2026 | ARCH Venture Fund XIII, L.P. | – | Buy | 2,321,262 | $10.77 | $25.0M | – |
| Nov 4, 2026 | ARCH Venture Partners IX, LLC | – | Buy | 2,321,262 | $10.77 | $25.0M | – |
| Oct 12, 2026 | Aguirre Jarrad Mattieu | Chief Medical Officer | Sell | 422 | $8.63 | $4K | – |
| Sep 10, 2026 | Shook David | Chief Medical Officer | Sell | 500 | $12.70 | $6K | – |
| Aug 21, 2026 | Lee Gary K. | Chief Scientific Officer | Sell | 1,457 | $15.54 | $23K | −0.3% |
| Aug 21, 2026 | Hill Stephen J. | Chief Operating Officer | Sell | 989 | $15.54 | $15K | −0.3% |
| Aug 21, 2026 | Seely Lynn | President and CEO | Sell | 9,589 | $15.54 | $149K | −0.3% |
| Aug 10, 2026 | Seely Lynn | President and CEO | Sell | 390 | $14.34 | $6K | −0.2% |
| Aug 10, 2026 | Hill Stephen J. | Chief Operating Officer | Sell | 89 | $14.34 | $1K | −0.2% |
| Aug 10, 2026 | Bulis Veronica Sanchez | VP, Corporate Controller | Sell | 621 | $14.34 | $9K | −0.2% |
| Aug 10, 2026 | Lee Gary K. | Chief Scientific Officer | Sell | 131 | $14.34 | $2K | −0.2% |
Data as of November 8, 2026. Public filings only. A purchase or sale by a politician or an insider does not by itself imply any wrongdoing.
New to these filings? Read how to read a Form 4, how Congress trades are disclosed and what insider cluster buying means. Sources and limits are on the Methodology page.
See these filings as they land
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