MarketPeel
Insider Trading Intelligence
LS

Lynn Seely

LYEL
PRESIDENT AND CEO · LYELL IMMUNOPHARMA, INC. · CIK 0001327111
FILING MIX · LIFETIME60%/40%
BUYS
12
SELLS
8
TOTAL VALUE
$389.5K
COMPANIES
1
ACTIVE SINCE
Jun 2022
HOLDINGS NOW
73,878
AVG SELL PX
$16.92
TRADE KIND
SHOWING 20 / 20
Trades · vs SPY
Loading price series…
Performance · forward returns vs SPY
7 backtested trades · 8 horizons · 15 pending
Forward-return performance of every backtestable P/S trade by Lynn Seely, measured at 8 horizons from 7 days to 2 years. Deduped per economic event so co-filings count once. Excess return = trade return minus SPY return over the same window.
HORIZONTRADESWIN RATEINSIDER RETURNSPY RETURNMEAN EXCESSMEDIAN EXCESST-STAT
7d7+14.29%+2.05%-0.16%+2.21%+1.72%
14d7+28.57%+4.60%+0.03%+4.57%+2.66%
30d7+14.29%+16.72%-0.25%+16.97%+18.48%
60d7+14.29%+26.58%+1.96%+24.62%+37.00%
90d7+28.57%+24.41%+5.77%+18.64%+29.67%
180d7(2 pending)+20.00%+78.79%+9.70%+69.09%+106.05%
1y7(6 pending)+100.00%+81.62%+18.03%+63.59%+63.59%
2y7(7 pending)
How to read this: Insider Returnis the average raw return of the filer's trades over the horizon. SPY Return is what SPY did over those same windows — reference only, not a comparison. The headline alpha number is Mean Excess = Insider − SPY; green means the filer beat SPY, red means they trailed it. Win rate is the share of individual trades where the filer beat SPY. T-statvalues above 2 mean the alpha is unlikely to be chance given the sample size. "Pending" counts trades where the horizon hasn't elapsed yet; their stats are not included in the row average.
Holdings over time
LYEL · 73,878 shares · as of May 11, 2026
01,875,0003,750,0005,625,0007,500,0002023202420252026SHARES HELD
Trading cadence · quarterly flow
BUY SELL
2022
2022
2022
2023
2023
2023
2023
2024
2024
2024
2024
2025
2025
2025
2025
2026
2026
FLOW · 12 buys / 8 sellsCOVERAGE · 17 quarters
Form 4 filings · all activity
COMPANYTYPESHARESPRICEVALUEHELD AFTERTRADE DATEFILEDDETAILS
LYEL
LYELL IMMUNOPHARMA, INC.
SALE
President and CEO
388$18.91$7.3K73,878May 11, 2026Jun 15, 2026View →
LYEL
LYELL IMMUNOPHARMA, INC.
SALE
President and CEO
7,455$23.39$174.4K74,266Feb 11, 2026Feb 12, 2026View →
LYEL
LYELL IMMUNOPHARMA, INC.
PURCHASEGRANT
Stock grant
155,000155,000Feb 10, 2026Feb 11, 2026View →
LYEL
LYELL IMMUNOPHARMA, INC.
SALE
President and CEO
438$23.12$10.1K81,721Feb 10, 2026Feb 11, 2026View →
LYEL
LYELL IMMUNOPHARMA, INC.
PURCHASEGRANT
Stock grant
20,00082,159Feb 9, 2026Feb 11, 2026View →
LYEL
LYELL IMMUNOPHARMA, INC.
SALE
President and CEO
412$16.11$6.6K67,159Nov 10, 2025Nov 12, 2025View →
LYEL
LYELL IMMUNOPHARMA, INC.
PURCHASEGRANT
Stock grant
175,000175,000Oct 27, 2025Oct 29, 2025View →
LYEL
LYELL IMMUNOPHARMA, INC.
SALE
President and CEO
7,257$10.54$76.5K67,571Aug 21, 2025Aug 22, 2025View →
LYEL
LYELL IMMUNOPHARMA, INC.
PURCHASEGRANT
Stock grant
40,00074,828Aug 20, 2025Aug 22, 2025View →
LYEL
LYELL IMMUNOPHARMA, INC.
SALE
President and CEO
406$10.34$4.2K34,828Aug 12, 2025Aug 13, 2025View →
LYEL
LYELL IMMUNOPHARMA, INC.
SALE
President and CEO
391$10.53$4.1K35,234Aug 11, 2025Aug 13, 2025View →
LYEL
LYELL IMMUNOPHARMA, INC.
PURCHASE
President and CEO
175,000$0.61$106.2K712,500Mar 14, 2025Mar 18, 2025View →
LYEL
LYELL IMMUNOPHARMA, INC.
PURCHASEGRANT
Stock grant
168,750168,750Feb 10, 2025Feb 26, 2025View →
LYEL
LYELL IMMUNOPHARMA, INC.
PURCHASEGRANT
Stock grant
337,500537,500Feb 10, 2025Feb 26, 2025View →
LYEL
LYELL IMMUNOPHARMA, INC.
PURCHASEGRANT
Stock grant
1,350,0001,350,000Feb 10, 2025Feb 26, 2025View →
LYEL
LYELL IMMUNOPHARMA, INC.
PURCHASEGRANT
Stock grant
200,000200,000Feb 9, 2024Feb 13, 2024View →
LYEL
LYELL IMMUNOPHARMA, INC.
SALE
President and CEO
7,500,0000Nov 16, 2023Nov 20, 2023View →
LYEL
LYELL IMMUNOPHARMA, INC.
PURCHASEGRANT
Stock grant
7,500,0007,500,000Nov 16, 2023Nov 20, 2023View →
LYEL
LYELL IMMUNOPHARMA, INC.
PURCHASEGRANT
Stock grant
7,500,0007,500,000Dec 15, 2022Dec 19, 2022View →
LYEL
LYELL IMMUNOPHARMA, INC.
PURCHASEGRANT
Stock grant
65,00065,000Jun 8, 2022Jun 10, 2022View →
Other insiders · LYEL
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About this filer
CIK 0001327111
ROLE
President and CEO
PRIMARY
LYEL
COMPANIES
1
ACTIVE SINCE
Jun 2022
MARKETPEEL · /INSIDER/0001327111DATA · SEC EDGAR · FORM 4 · CONSOLIDATED TAPE
FREE · DAILY · 6 AM ET

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