MarketPeel
Insider Trading Intelligence
MA

Michael G. Atieh

CB
DIRECTOR · CHUBB LTD · CIK 0001072501
FILING MIX · LIFETIME40%/60%
BUYS
10
SELLS
15
TOTAL VALUE
$1.97M
COMPANIES
3
ACTIVE SINCE
May 2020
HOLDINGS NOW
155,551
AVG SELL PX
$215.47
TRADE KIND
SHOWING 25 / 25
Trades · vs SPY
Loading price series…
Performance · forward returns vs SPY
7 backtested trades · 8 horizons · 2 pendingHow are these numbers computed? →
Forward-return performance of every backtestable P/S trade by Michael G. Atieh, 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+28.57%+0.29%+0.88%-0.59%-0.24%
14d7+42.86%+0.66%+1.48%-0.82%-0.87%
30d7+71.43%-1.69%+0.45%-2.14%-2.52%
60d7+85.71%-3.23%+2.89%-6.12%-7.47%
90d7+42.86%+1.02%+5.54%-4.52%-5.40%
180d7+0.00%+7.18%+8.17%-0.98%-5.38%
1y7+28.57%+12.87%+14.61%-1.74%-6.35%
2y7(2 pending)+0.00%+24.56%+27.04%-2.48%-9.27%
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
CB · 40,785.24 shares · as of May 21, 2026
010,23320,46530,69840,931202120222023202420252026SHARES HELD
Trading cadence · quarterly flow
BUY SELL
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 · 10 buys / 15 sellsCOVERAGE · 25 quarters
Form 4 filings · all activity
COMPANYTYPESHARESPRICEVALUEHELD AFTERTRADE DATEFILEDDETAILS
IMTX
IMMATICS N.V.
PURCHASEGRANT
Stock grant
48,00048,000Jun 16, 2026Jun 18, 2026View →
CB
CHUBB LTD
PURCHASEGRANT
Stock grant
68140,785.24May 21, 2026May 26, 2026View →
CB
CHUBB LTD
SALE
193$330.26$63.7K40,592.24May 21, 2026May 26, 2026View →
CB
CHUBB LTD
SALE
578$329.53$190.5K40,014.24May 21, 2026May 26, 2026View →
CB
CHUBB LTD
SALE
538$287.56$154.7K39,474.29Jun 16, 2025Jun 18, 2025View →
CB
CHUBB LTD
PURCHASEGRANT
Stock grant
77140,192.29May 15, 2025May 16, 2025View →
CB
CHUBB LTD
SALE
180$292.05$52.6K40,012.29May 15, 2025May 16, 2025View →
CB
CHUBB LTD
SALE
261$287.49$75.0K39,171.69Sep 3, 2024Sep 5, 2024View →
CB
CHUBB LTD
SALE
716$269.70$193.1K39,294.61May 17, 2024May 20, 2024View →
CB
CHUBB LTD
PURCHASEGRANT
Stock grant
71840,249.61May 16, 2024May 17, 2024View →
CB
CHUBB LTD
SALE
239$264.88$63.3K40,010.61May 16, 2024May 17, 2024View →
CB
CHUBB LTD
SALE
750$208.39$156.3K38,933.23Jul 28, 2023Aug 14, 2023View →
CB
CHUBB LTD
SALE
233$198.93$46.4K39,683.23May 17, 2023May 19, 2023View →
CB
CHUBB LTD
PURCHASEGRANT
Stock grant
95539,916.23May 17, 2023May 19, 2023View →
CB
CHUBB LTD
SALE
500$203.49$101.7K38,339.59May 20, 2022May 23, 2022View →
CB
CHUBB LTD
SALE
271$203.88$55.3K38,839.59May 19, 2022May 23, 2022View →
CB
CHUBB LTD
PURCHASEGRANT
Stock grant
93239,110.59May 19, 2022May 23, 2022View →
CB
CHUBB LTD
SALE
2,944$186.20$548.2K37,555.7Aug 18, 2021Aug 20, 2021View →
ECOR
ELECTROCORE, INC.
PURCHASEGRANT
Stock grant
66,76666,766Jun 11, 2021Jun 15, 2021View →
CB
CHUBB LTD
PURCHASEGRANT
Stock grant
1,08340,930.7May 20, 2021May 24, 2021View →
CB
CHUBB LTD
SALE
431$166.16$71.6K40,499.7May 20, 2021May 24, 2021View →
CB
CHUBB LTD
SALE
1,000$165.36$165.4K39,041.26Feb 10, 2021Feb 12, 2021View →
ECOR
ELECTROCORE, INC.
PURCHASEGRANT
Stock grant
112,500112,500Jun 12, 2020Jun 16, 2020View →
CB
CHUBB LTD
SALE
309$104.61$32.3K40,041.26May 20, 2020May 22, 2020View →
CB
CHUBB LTD
PURCHASEGRANT
Stock grant
1,72140,350.26May 20, 2020May 22, 2020View →
Other insiders · CB
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About this filer
CIK 0001072501
ROLE
Director
PRIMARY
CB
COMPANIES
3
ACTIVE SINCE
May 2020
MARKETPEEL · /INSIDER/0001072501DATA · SEC EDGAR · FORM 4 · CONSOLIDATED TAPE
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