MarketPeel
Insider Trading Intelligence
SH

Stephen J. Hill

LYEL
CHIEF OPERATING OFFICER · LYELL IMMUNOPHARMA, INC. · CIK 0001866154
FILING MIX · LIFETIME57%/43%
BUYS
17
SELLS
13
TOTAL VALUE
$47.2K
COMPANIES
1
ACTIVE SINCE
Mar 2022
HOLDINGS NOW
17,894
AVG SELL PX
$17.35
TRADE KIND
SHOWING 30 / 30
Trades · vs SPY
Loading price series…
Performance · forward returns vs SPY
6 backtested trades · 8 horizons · 14 pending
Forward-return performance of every backtestable P/S trade by Stephen J. Hill, 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
7d6+16.67%+2.56%-0.28%+2.83%+1.92%
14d6+33.33%+6.62%+0.20%+6.42%+2.98%
30d6+16.67%+23.50%+0.36%+23.14%+19.73%
60d6+16.67%+36.14%+1.52%+34.62%+45.18%
90d6+33.33%+31.27%+5.46%+25.81%+43.55%
180d6(2 pending)+0.00%+95.56%+8.07%+87.50%+109.02%
1y6(6 pending)
2y6(6 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 · 17,894 shares · as of May 11, 2026
0225,000450,000675,000900,0002023202420252026SHARES HELD
Trading cadence · quarterly flow
BUY SELL
2022
2022
2022
2022
2023
2023
2023
2023
2024
2024
2024
2024
2025
2025
2025
2025
2026
2026
FLOW · 17 buys / 13 sellsCOVERAGE · 18 quarters
Form 4 filings · all activity
COMPANYTYPESHARESPRICEVALUEHELD AFTERTRADE DATEFILEDDETAILS
LYEL
LYELL IMMUNOPHARMA, INC.
SALE
Chief Operating Officer
89$18.92$1.7K17,894May 11, 2026Jun 15, 2026View →
LYEL
LYELL IMMUNOPHARMA, INC.
SALE
Chief Operating Officer
1,236$23.39$28.9K17,795Feb 11, 2026Feb 12, 2026View →
LYEL
LYELL IMMUNOPHARMA, INC.
SALE
Chief Operating Officer
109$23.12$2.5K19,031Feb 10, 2026Feb 11, 2026View →
LYEL
LYELL IMMUNOPHARMA, INC.
PURCHASEGRANT
Stock grant
65,00065,000Feb 10, 2026Feb 11, 2026View →
LYEL
LYELL IMMUNOPHARMA, INC.
PURCHASEGRANT
Stock grant
4,00019,140Feb 9, 2026Feb 11, 2026View →
LYEL
LYELL IMMUNOPHARMA, INC.
SALE
Chief Operating Officer
95$16.12$1.5K15,750Nov 10, 2025Nov 12, 2025View →
LYEL
LYELL IMMUNOPHARMA, INC.
PURCHASEGRANT
Stock grant
75,00075,000Oct 27, 2025Oct 29, 2025View →
LYEL
LYELL IMMUNOPHARMA, INC.
SALE
Chief Operating Officer
1,004$10.54$10.6K15,845Aug 21, 2025Aug 22, 2025View →
LYEL
LYELL IMMUNOPHARMA, INC.
PURCHASEGRANT
Stock grant
8,00016,849Aug 20, 2025Aug 22, 2025View →
LYEL
LYELL IMMUNOPHARMA, INC.
SALE
Chief Operating Officer
94$10.34$9728,849Aug 12, 2025Aug 13, 2025View →
LYEL
LYELL IMMUNOPHARMA, INC.
SALE
Chief Operating Officer
91$10.53$9588,943Aug 11, 2025Aug 13, 2025View →
LYEL
LYELL IMMUNOPHARMA, INC.
PURCHASEGRANT
Stock grant
112,500172,899Feb 10, 2025Feb 26, 2025View →
LYEL
LYELL IMMUNOPHARMA, INC.
PURCHASEGRANT
Stock grant
450,000450,000Feb 10, 2025Feb 26, 2025View →
LYEL
LYELL IMMUNOPHARMA, INC.
PURCHASEGRANT
Stock grant
56,25056,250Feb 10, 2025Feb 26, 2025View →
LYEL
LYELL IMMUNOPHARMA, INC.
PURCHASEGRANT
Stock grant
40,00048,928Feb 9, 2024Feb 13, 2024View →
LYEL
LYELL IMMUNOPHARMA, INC.
PURCHASEGRANT
Stock grant
400,000400,000Feb 9, 2024Feb 13, 2024View →
LYEL
LYELL IMMUNOPHARMA, INC.
PURCHASEGRANT
Stock grant
165,000165,000Nov 16, 2023Nov 20, 2023View →
LYEL
LYELL IMMUNOPHARMA, INC.
SALE
Chief Technical Ops. Officer
500,0000Nov 16, 2023Nov 20, 2023View →
LYEL
LYELL IMMUNOPHARMA, INC.
SALE
Chief Technical Ops. Officer
165,0000Nov 16, 2023Nov 20, 2023View →
LYEL
LYELL IMMUNOPHARMA, INC.
PURCHASEGRANT
Stock grant
700,000700,000Nov 16, 2023Nov 20, 2023View →
LYEL
LYELL IMMUNOPHARMA, INC.
PURCHASEGRANT
Stock grant
450,000450,000Nov 16, 2023Nov 20, 2023View →
LYEL
LYELL IMMUNOPHARMA, INC.
PURCHASEGRANT
Stock grant
85,00085,000Nov 16, 2023Nov 20, 2023View →
LYEL
LYELL IMMUNOPHARMA, INC.
SALE
Chief Technical Ops. Officer
85,0000Nov 16, 2023Nov 20, 2023View →
LYEL
LYELL IMMUNOPHARMA, INC.
SALE
Chief Technical Ops. Officer
450,0000Nov 16, 2023Nov 20, 2023View →
LYEL
LYELL IMMUNOPHARMA, INC.
SALE
Chief Technical Ops. Officer
100,0000Nov 16, 2023Nov 20, 2023View →
LYEL
LYELL IMMUNOPHARMA, INC.
PURCHASEGRANT
Stock grant
100,000100,000Nov 16, 2023Nov 20, 2023View →
LYEL
LYELL IMMUNOPHARMA, INC.
PURCHASEGRANT
Stock grant
500,000500,000Nov 16, 2023Nov 20, 2023View →
LYEL
LYELL IMMUNOPHARMA, INC.
SALE
Chief Technical Ops. Officer
700,0000Nov 16, 2023Nov 20, 2023View →
LYEL
LYELL IMMUNOPHARMA, INC.
PURCHASEGRANT
Stock grant
900,000900,000Feb 24, 2023Feb 28, 2023View →
LYEL
LYELL IMMUNOPHARMA, INC.
PURCHASEGRANT
Stock grant
700,000700,000Mar 16, 2022Mar 18, 2022View →
Other insiders · LYEL
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About this filer
CIK 0001866154
ROLE
Chief Operating Officer
PRIMARY
LYEL
COMPANIES
1
ACTIVE SINCE
Mar 2022
MARKETPEEL · /INSIDER/0001866154DATA · SEC EDGAR · FORM 4 · CONSOLIDATED TAPE
FREE · DAILY · 6 AM ET

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