MarketPeel
Insider Trading Intelligence
SB

Sean Brynjelsen

ETON
PRESIDENT & CEO · ETON PHARMACEUTICALS, INC. · CIK 0001669976
FILING MIX · LIFETIME59%/41%
BUYS
13
SELLS
9
TOTAL VALUE
$7.70M
COMPANIES
1
ACTIVE SINCE
Mar 2020
HOLDINGS NOW
833,694
AVG SELL PX
$22.26
TRADE KIND
SHOWING 22 / 22
Trades · vs SPY
Loading price series…
Performance · forward returns vs SPY
8 backtested trades · 8 horizons · 5 pending
Forward-return performance of every backtestable P/S trade by Sean Brynjelsen, 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
7d8+87.50%-4.88%+0.74%-5.62%-10.26%
14d8+87.50%-10.21%+0.55%-10.76%-20.37%
30d8+75.00%-9.80%+3.40%-13.21%-20.48%
60d8+87.50%-4.29%+4.69%-8.98%-21.77%
90d8+62.50%+2.55%+7.05%-4.50%-7.66%
180d8+75.00%-1.72%+11.23%-12.95%-24.71%
1y8+12.50%+38.70%+10.10%+7.96%-6.28%
2y8(5 pending)+66.67%+37.82%+21.25%+16.57%-0.34%
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
ETON · 833,694 shares · as of May 28, 2026
0786,9571,573,9152,360,8723,147,829202120222023202420252026SHARES HELD
Trading cadence · quarterly flow
BUY SELL
2020
2020
2020
2020
2021
2021
2021
2021
2022
2022
2022
2022
2023
2023
2023
2023
2024
2024
2024
2024
2025
2025
2025
2025
2026
2026
FLOW · 13 buys / 9 sellsCOVERAGE · 26 quarters
Form 4 filings · all activity
COMPANYTYPESHARESPRICEVALUEHELD AFTERTRADE DATEFILEDDETAILS
ETON
ETON PHARMACEUTICALS, INC.
SALE
President & CEO
148$32.67$4.8K833,694May 28, 2026May 29, 2026View →
ETON
ETON PHARMACEUTICALS, INC.
SALE
President & CEO
119,852$31.88$3.82M833,842May 28, 2026May 29, 2026View →
ETON
ETON PHARMACEUTICALS, INC.
PURCHASEGRANT
Stock grant
158,0463,047,312Jan 12, 2026Jan 14, 2026View →
ETON
ETON PHARMACEUTICALS, INC.
PURCHASEGRANT
Stock grant
100,5173,147,829Jan 12, 2026Jan 14, 2026View →
ETON
ETON PHARMACEUTICALS, INC.
SALE
President & CEO
5,015$15.39$77.2K2,889,266Jan 1, 2026Jan 14, 2026View →
ETON
ETON PHARMACEUTICALS, INC.
SALE
President & CEO
6,732$16.83$113.3K2,894,281Dec 12, 2025Dec 12, 2025View →
ETON
ETON PHARMACEUTICALS, INC.
SALE
President & CEO
70,000$16.81$1.18M2,873,513Jun 5, 2025Jun 5, 2025View →
ETON
ETON PHARMACEUTICALS, INC.
SALE
President & CEO
70,000$17.00$1.19M2,943,513Jun 4, 2025Jun 5, 2025View →
ETON
ETON PHARMACEUTICALS, INC.
SALE
President & CEO
400$19.02$7.6K3,013,513Jun 3, 2025Jun 5, 2025View →
ETON
ETON PHARMACEUTICALS, INC.
SALE
President & CEO
60,945$17.38$1.06M3,022,568Jun 3, 2025Jun 5, 2025View →
ETON
ETON PHARMACEUTICALS, INC.
SALE
President & CEO
8,655$18.38$159.1K3,013,913Jun 3, 2025Jun 5, 2025View →
ETON
ETON PHARMACEUTICALS, INC.
PURCHASEGRANT
Stock grant
72,00472,004Jan 3, 2025Jan 6, 2025View →
ETON
ETON PHARMACEUTICALS, INC.
PURCHASEGRANT
Stock grant
107,469107,469Jan 3, 2025Jan 6, 2025View →
ETON
ETON PHARMACEUTICALS, INC.
PURCHASEGRANT
Stock grant
438,6332,473,014Feb 13, 2024Feb 15, 2024View →
ETON
ETON PHARMACEUTICALS, INC.
PURCHASEGRANT
Stock grant
350,3811,951,881Mar 3, 2023Mar 3, 2023View →
ETON
ETON PHARMACEUTICALS, INC.
PURCHASE
Chief Executive Officer
10,000$2.10$21.0K1,040,000Sep 22, 2022Sep 23, 2022View →
ETON
ETON PHARMACEUTICALS, INC.
PURCHASEGRANT
Stock grant
110,000110,000Jul 12, 2022Jul 18, 2022View →
ETON
ETON PHARMACEUTICALS, INC.
PURCHASEGRANT
Stock grant
416,5001,601,500Feb 7, 2022Feb 28, 2022View →
ETON
ETON PHARMACEUTICALS, INC.
PURCHASE
President & CEO
10,000$4.32$43.2K1,030,000Aug 20, 2021Aug 20, 2021View →
ETON
ETON PHARMACEUTICALS, INC.
PURCHASE
President & CEO
5,000$5.96$29.8K1,030,000Jun 3, 2021Jun 3, 2021View →
ETON
ETON PHARMACEUTICALS, INC.
PURCHASEGRANT
Stock grant
245,0001,185,000May 3, 2021May 5, 2021View →
ETON
ETON PHARMACEUTICALS, INC.
PURCHASEGRANT
Stock grant
490,000490,000Mar 12, 2020Mar 16, 2020View →
Other insiders · ETON
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About this filer
CIK 0001669976
ROLE
President & CEO
PRIMARY
ETON
COMPANIES
1
ACTIVE SINCE
Mar 2020
MARKETPEEL · /INSIDER/0001669976DATA · SEC EDGAR · FORM 4 · CONSOLIDATED TAPE
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