Lynn Seely insider trades: Lyell Immunopharma (LYEL) stock buys and sales
Trades on the price chart
Daily close, with an arrow on each day they bought or sold
Companies
Where Lynn reports to the SEC
Open-market buys and sales
39 trades reported on SEC Form 4, newest first
| Date | Stock | Type | Shares | Price | Value | Holding | Reported |
|---|---|---|---|---|---|---|---|
| Aug 21, 2026 | LYEL | ↓ Sell | 9,589 | $15.54 | $149K | Direct | Aug 25, 2026 (4d) |
| Aug 10, 2026 | LYEL | ↓ Sell | 390 | $14.34 | $6K | Direct | Aug 11, 2026 (1d) |
| May 11, 2026 | LYEL | ↓ Sell | 388 | $18.91 | $7K | Direct | Jun 15, 2026 (35d) |
| Feb 11, 2026 | LYEL | ↓ Sell | 7,455 | $23.39 | $174K | Direct | Feb 12, 2026 (1d) |
| Feb 10, 2026 | LYEL | ↓ Sell | 438 | $23.12 | $10K | Direct | Feb 11, 2026 (1d) |
| Nov 10, 2025 | LYEL | ↓ Sell | 412 | $16.11 | $7K | Direct | Nov 12, 2025 (2d) |
| Aug 21, 2025 | LYEL | ↓ Sell | 7,257 | $10.54 | $77K | Direct | Aug 22, 2025 (1d) |
| Aug 12, 2025 | LYEL | ↓ Sell | 797 | $10.43 | $8K | Direct | Aug 13, 2025 (1d) |
| Mar 14, 2025 | LYEL | ↑ Buy | 175,000 | $0.61 | $106K | Direct | Mar 18, 2025 (4d) |
| Oct 22, 2014 | MDVN | ↓ Sell10b5-1 | 5,000 | $99.03 | $495K | Direct | Oct 23, 2014 (1d) |
| Oct 16, 2014 | MDVN | ↓ Sell | 29,346 | $89.93 | $2.6M | Direct | Oct 17, 2014 (1d) |
| Sep 18, 2014 | MDVN | ↓ Sell10b5-1 | 55,000 | $98.47 | $5.4M | Direct | Sep 18, 2014 (0d) |
| Sep 9, 2014 | MDVN | ↓ Sell10b5-1 | 20,000 | $94.60 | $1.9M | Direct | Sep 11, 2014 (2d) |
| Aug 27, 2014 | MDVN | ↓ Sell10b5-1 | 20,000 | $89.42 | $1.8M | Direct | Aug 28, 2014 (1d) |
| Aug 13, 2014 | MDVN | ↓ Sell10b5-1 | 20,000 | $83.62 | $1.7M | Direct | Aug 14, 2014 (1d) |
| Aug 12, 2014 | MDVN | ↓ Sell10b5-1 | 25,500 | $83.02 | $2.1M | Direct | Aug 12, 2014 (0d) |
| Jul 22, 2014 | MDVN | ↓ Sell10b5-1 | 7,500 | $73.96 | $555K | Direct | Jul 23, 2014 (1d) |
| Jul 2, 2014 | MDVN | ↓ Sell10b5-1 | 12,000 | $79.02 | $948K | Direct | Jul 7, 2014 (5d) |
| Jun 18, 2014 | MDVN | ↓ Sell10b5-1 | 15,000 | $74.75 | $1.1M | Direct | Jun 19, 2014 (1d) |
| Jul 26, 2012 | MDVN | ↓ Sell10b5-1 | 40,000 | $99.63 | $4.0M | Direct | Jul 27, 2012 (1d) |
| May 22, 2012 | MDVN | ↓ Sell10b5-1 | 12,500 | $88.51 | $1.1M | Direct | May 24, 2012 (2d) |
| May 17, 2012 | MDVN | ↓ Sell10b5-1 | 14,360 | $88.01 | $1.3M | Direct | May 21, 2012 (4d) |
| May 14, 2012 | MDVN | ↓ Sell10b5-1 | 35,640 | $88.08 | $3.1M | Direct | May 16, 2012 (2d) |
| Mar 8, 2012 | MDVN | ↓ Sell | 71,555 | $70.11 | $5.0M | Direct | Mar 12, 2012 (4d) |
| Mar 15, 2011 | MDVN | ↓ Sell | 50,000 | $16.48 | $824K | Direct | Mar 17, 2011 (2d) |
| Feb 15, 2011 | MDVN | ↓ Sell | 50,000 | $17.97 | $898K | Direct | Feb 16, 2011 (1d) |
| Jan 19, 2011 | MDVN | ↓ Sell | 50,000 | $15.02 | $751K | Direct | Jan 20, 2011 (1d) |
| Dec 7, 2009 | MDVN | ↓ Sell | 18,000 | $33.27 | $599K | Direct | Dec 8, 2009 (1d) |
| Sep 10, 2009 | MDVN | ↓ Sell | 18,000 | $25.87 | $466K | Direct | Sep 11, 2009 (1d) |
| Jul 1, 2009 | MDVN | ↓ Sell | 18,000 | $22.37 | $403K | Direct | Jul 2, 2009 (1d) |
| Mar 18, 2009 | MDVN | ↓ Sell | 18,000 | $16.64 | $299K | Direct | Mar 19, 2009 (1d) |
| Dec 3, 2008 | MDVN | ↓ Sell | 9,000 | $14.16 | $127K | Direct | Dec 5, 2008 (2d) |
| Sep 25, 2008 | MDVN | ↓ Sell | 9,000 | $29.57 | $266K | Direct | Sep 29, 2008 (4d) |
| Jun 9, 2008 | MDVN | ↓ Sell | 9,000 | $14.94 | $134K | Direct | Jun 11, 2008 (2d) |
| Mar 3, 2008 | MDVN | ↓ Sell | 9,000 | $15.64 | $141K | Direct | Mar 5, 2008 (2d) |
| Dec 3, 2007 | MDVN | ↓ Sell | 9,000 | $13.11 | $118K | Direct | Dec 5, 2007 (2d) |
| Sep 19, 2007 | MDVN | ↓ Sell | 9,000 | $18.94 | $170K | Direct | Sep 21, 2007 (2d) |
| Jun 5, 2007 | MDVN | ↓ Sell | 9,000 | $16.70 | $150K | Direct | Jun 7, 2007 (2d) |
| Mar 16, 2007 | MDVN | ↓ Sell | 9,000 | $17.80 | $160K | Direct | Mar 20, 2007 (4d) |
Each row is one filing's trades in one stock, summed. Shares and prices are as filed, before any later stock split.
Other LYEL insiders
Open-market trades in the last 12 months
About Lynn Seely's insider trades
Lynn Seely is President and CEO at Lyell Immunopharma (LYEL). Since Mar 16, 2007, Lynn has reported 1 open-market purchase worth $106K and 38 sales worth $39.1M on SEC Form 4. In the last 12 months: 6 sales ($353K).
13 sales (65% of the value sold) were made under a Rule 10b5-1 trading plan, which is set up months in advance and runs on a schedule, so they say little about how the insider sees the stock today.
Their filings also include grants and awards (36 filings), option exercises (32 filings), shares returned to the company (3 filings), other transactions (1 filing). These aren't open-market trades and aren't counted above.
How to read insider trades
Officers, directors and owners of more than 10% of a company must report trades in its stock on SEC Form 4, usually within two business days. Purchases with their own money are the stronger signal: insiders sell for many reasons (taxes, diversification, a house), but buy for one. See every LYEL insider trade, the latest insider trades across the market, or cluster buys, when several insiders buy the same stock within days.