Insider txns (12m)
11
Stock / equity
LYEL Lyell Immunopharma, Inc.
- Company
- Lyell Immunopharma, Inc.
- Security
- Equity
- Size, estimated from filings
- Small cap ($300M – $2B)
- Insiders on record
- 8
- Latest trade on record
- October 12, 2026
LYEL (Lyell Immunopharma, Inc.) has 11 disclosed insider transactions from 7 insiders in the last 12 months (0 open-market buys, 9 sales, about $215K at reported prices) and 0 congressional trades from 0 members of Congress. The most recent disclosure was filed October 13, 2026.
Open-market buys / sales
0 / 9
Congress trades (12m)
0
Distinct filers (12m)
7
Share price
Price and chart by TradingView for Lyell Immunopharma, Inc.. US share prices here are delayed, not real-time. The trade records on this page come from government filings, not from this chart.
LYEL in charts
Who is trading this stock
Which people account for the buying and selling over the last 12 months?
BoughtSold
6 people account for the disclosed buying and selling in LYEL over the last 12 months; the most active is Seely Lynn with $155K.
Prices insiders traded at
What price did insiders buy and sell at? Each marker is one open-market trade at the share price reported on its Form 4.
▲ Bought▼ SoldAverage reported price that day
Insiders reported 9 open-market trades in LYEL since Aug 10, 2026, at prices from $8.63 to $15.54; the most recent was a sale at $8.63 on Oct 12, 2026. These are the prices on the filings, not adjusted for stock splits, and not a market price series.
Insider holdings over time
Is an insider building or unwinding a position? Shares held directly after each filing.
Lee Gary K.Hill Stephen J.
Lee Gary K. reported 16,220 shares held after the latest filing, against 17,677 at the first on record.
Insiders trading LYEL
Everyone who filed a Form 4 for this ticker, by number of rows on record. "Bought" and "sold" count open-market purchases (code P) and sales only; awards, option exercises and shares withheld for tax are in the row count but not in those two columns.
| Insider | Role | Rows | Bought | Sold | Value bought | Value sold | Latest |
|---|---|---|---|---|---|---|---|
| Aguirre Jarrad Mattieu | Chief Medical Officer | 2 | 0 | 1 | — | $3,642 | October 12, 2026 |
| Hill Stephen J. | Chief Operating Officer | 2 | 0 | 2 | — | $17K | August 21, 2026 |
| Lee Gary K. | Chief Scientific Officer | 2 | 0 | 2 | — | $25K | August 21, 2026 |
| Seely Lynn | President and CEO | 2 | 0 | 2 | — | $155K | August 21, 2026 |
| GLAXOSMITHKLINE PLC | Insider | 2 | 0 | 0 | — | — | June 21, 2021 |
| Shook David | Chief Medical Officer | 1 | 0 | 1 | — | $6,350 | September 10, 2026 |
| Bulis Veronica Sanchez | VP, Corporate Controller | 1 | 0 | 1 | — | $8,905 | August 10, 2026 |
| Innovative Cellular Therapeutics Holdings Ltd | Insider | 1 | 0 | 0 | — | — | July 27, 2026 |
What kind of transactions these are 4 Form 4 codes
| Code | Meaning | Rows | Shares | Value at reported prices |
|---|---|---|---|---|
| S | Open-market sale | 9 | 14,188 | $215K |
| C | Conversion of a derivative | 2 | 60,506,378 | — |
| A | Grant or award | 1 | 47,500 | — |
| J | Other acquisition or disposal | 1 | 44,000 | — |
What each code means: Form 4 transaction codes.
Insider transactions
| Filer | Side | Trade date | Disclosed | Lag | Shares | Price | Value | Flags | Source | Share |
|---|---|---|---|---|---|---|---|---|---|---|
| Aguirre Jarrad Mattieu | Sell S | October 12, 2026 | October 13, 2026 | 1d | 422 | $9 | $3,642 | Form 4 ↗ | ||
| Aguirre Jarrad Mattieu | Other A | September 10, 2026 | September 10, 2026 | 0d | 47,500 | — | — | derivative | Form 4 ↗ | |
| Shook David | Sell S | September 10, 2026 | September 10, 2026 | 0d | 500 | $13 | $6,350 | Form 4 ↗ | ||
| Lee Gary K. | Sell S | August 21, 2026 | August 25, 2026 | 4d | 1,457 | $16 | $23K | Form 4 ↗ | ||
| Hill Stephen J. | Sell S | August 21, 2026 | August 25, 2026 | 4d | 989 | $16 | $15K | Form 4 ↗ | ||
| Seely Lynn | Sell S | August 21, 2026 | August 25, 2026 | 4d | 9,589 | $16 | $149K | Form 4 ↗ | ||
| Seely Lynn | Sell S | August 10, 2026 | August 11, 2026 | 1d | 390 | $14 | $5,593 | Form 4 ↗ | ||
| Hill Stephen J. | Sell S | August 10, 2026 | August 11, 2026 | 1d | 89 | $14 | $1,276 | Form 4 ↗ | ||
| Lee Gary K. | Sell S | August 10, 2026 | August 11, 2026 | 1d | 131 | $14 | $1,879 | Form 4 ↗ | ||
| Bulis Veronica Sanchez | Sell S | August 10, 2026 | August 11, 2026 | 1d | 621 | $14 | $8,905 | Form 4 ↗ | ||
| Innovative Cellular Therapeutics Holdings Ltd | Other J | July 27, 2026 | July 27, 2026 | 0d | 44,000 | — | — | Form 4 ↗ | ||
| GLAXOSMITHKLINE PLC | Exchange C | June 21, 2021 | June 23, 2021 | 2d | 30,253,189 | — | — | indirectderivative | Form 4 ↗ | |
| GLAXOSMITHKLINE PLC | Exchange C | June 21, 2021 | June 23, 2021 | 2d | 30,253,189 | — | — | indirect | Form 4 ↗ |
Congressional trades
No member of Congress has disclosed a trade in this ticker in the filings we have parsed.
Related stocks
Tickers traded by the same people who traded LYEL, by number of filers in common. It shows overlap in public filings and nothing else.
- WVE Wave Life Sciences, Inc. 1 filer in common
- BCYC BICYCLE THERAPEUTICS PLC 1 filer in common
- CVRX CVRx, Inc. 1 filer in common
- INVA Innoviva, Inc. 1 filer in common
- DBTX Decibel Therapeutics, Inc. 1 filer in common
- GNCA GENOCEA BIOSCIENCES, INC. 1 filer in common
- TBPH Theravance Biopharma, Inc. 1 filer in common
Guides for this page
- What is SEC Form 4? Who files: officers, directors and owners of more than 10% of a class of the company's shares.
- Form 4 transaction codes P = purchase. S = sale. These are the two market trades.
- Insider buying vs insider selling Selling outweighs buying by a wide margin in normal times.
- What disclosure data cannot tell you Filings are late by design: up to 45 days for Congress, two business days for insiders.
Sources and method
| Source | Filings | Rows | First filed | Newest filed | Read the originals |
|---|---|---|---|---|---|
| SEC EDGAR, Form 4 | 12 | 13 | June 23, 2021 | October 13, 2026 | Form 4 list on EDGAR |
Site built October 22, 2026. Every row in the tables above links to its own filing. To quote a figure, use the Cite button at the top of the page; see how to cite and reuse.
Insider rows are Form 4 filings for this issuer from SEC EDGAR; congressional rows are periodic transaction reports parsed from the House Clerk and the Senate eFD. Values use the reported price for Form 4 and the disclosed range for Congress. See methodology and corrections.
Not investment advice. Disclosures are shown as filed and may lag the trade or be amended. No recommendation is made or implied.