MarketPeel
Insider Trading Intelligence
BS

Brian Schopfer

MIR
CHIEF FINANCIAL OFFICER · MIRION TECHNOLOGIES, INC. · CIK 0001885701
FILING MIX · LIFETIME36%/64%
BUYS
15
SELLS
27
TOTAL VALUE
$9.51M
COMPANIES
1
ACTIVE SINCE
Oct 2021
HOLDINGS NOW
913,290
AVG SELL PX
$18.57
TRADE KIND
SHOWING 42 / 42
Trades · vs SPY
Loading price series…
Performance · forward returns vs SPY
5 backtested trades · 8 horizons · 6 pending
Forward-return performance of every backtestable P/S trade by Brian Schopfer, 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
7d5+60.00%-4.03%+0.81%-4.84%-7.22%
14d5+80.00%-6.49%-0.10%-6.39%-6.14%
30d5+60.00%-1.72%+1.32%-3.05%-2.89%
60d5+80.00%-1.65%+4.15%-5.79%-9.50%
90d5+60.00%-1.11%+5.83%-6.93%-9.70%
180d5+60.00%-3.91%+10.29%-14.20%-20.18%
1y5(2 pending)+33.33%+8.90%+19.28%-10.37%-24.86%
2y5(4 pending)+0.00%+65.92%+26.20%+39.72%+39.72%
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
MIR · 913,290 shares · as of Apr 1, 2026
0251,108502,216753,3241,004,43220222023202420252026SHARES HELD
Trading cadence · quarterly flow
BUY SELL
2021
2022
2022
2022
2022
2023
2023
2023
2023
2024
2024
2024
2024
2025
2025
2025
2025
2026
2026
FLOW · 15 buys / 27 sellsCOVERAGE · 19 quarters
Form 4 filings · all activity
COMPANYTYPESHARESPRICEVALUEHELD AFTERTRADE DATEFILEDDETAILS
MIR
MIRION TECHNOLOGIES, INC.
SALE
Chief Financial Officer
7,377$18.59$137.1K913,290Apr 1, 2026Apr 2, 2026View →
MIR
MIRION TECHNOLOGIES, INC.
PURCHASEGRANT
Stock grant
64,906949,166Mar 2, 2026Mar 3, 2026View →
MIR
MIRION TECHNOLOGIES, INC.
SALE
Chief Financial Officer
28,499$21.61$615.9K920,667Mar 2, 2026Mar 3, 2026View →
MIR
MIRION TECHNOLOGIES, INC.
SALE
Chief Financial Officer
9,172$21.61$198.2K884,260Mar 1, 2026Mar 3, 2026View →
MIR
MIRION TECHNOLOGIES, INC.
SALE
Chief Financial Officer
8,500$23.76$202.0K893,432Dec 27, 2025Dec 29, 2025View →
MIR
MIRION TECHNOLOGIES, INC.
SALEGRANT
Gift
100901,932Dec 8, 2025Dec 9, 2025View →
MIR
MIRION TECHNOLOGIES, INC.
SALEGRANT
Gift
2,400902,032Dec 5, 2025Dec 9, 2025View →
MIR
MIRION TECHNOLOGIES, INC.
SALE
Chief Financial Officer
50,000$27.66$1.38M904,432Nov 6, 2025Nov 10, 2025View →
MIR
MIRION TECHNOLOGIES, INC.
SALE
Chief Financial Officer
50,000$27.65$1.38M954,432Nov 6, 2025Nov 10, 2025View →
MIR
MIRION TECHNOLOGIES, INC.
PURCHASEGRANT
Stock grant
100,0001,004,432Nov 6, 2025Nov 10, 2025View →
MIR
MIRION TECHNOLOGIES, INC.
SALE
Chief Financial Officer
100,000399,935Nov 6, 2025Nov 10, 2025View →
MIR
MIRION TECHNOLOGIES, INC.
SALEGRANT
Gift
15,000904,432Oct 30, 2025Nov 3, 2025View →
MIR
MIRION TECHNOLOGIES, INC.
SALE
Chief Financial Officer
75,000$21.00$1.57M919,432Jun 25, 2025Jun 27, 2025View →
MIR
MIRION TECHNOLOGIES, INC.
SALE
Chief Financial Officer
75,000499,935Jun 25, 2025Jun 27, 2025View →
MIR
MIRION TECHNOLOGIES, INC.
PURCHASEGRANT
Stock grant
75,000994,432Jun 25, 2025Jun 27, 2025View →
MIR
MIRION TECHNOLOGIES, INC.
PURCHASEGRANT
Stock grant
75,000994,432May 21, 2025May 23, 2025View →
MIR
MIRION TECHNOLOGIES, INC.
SALE
Chief Financial Officer
75,000$18.27$1.37M919,432May 21, 2025May 23, 2025View →
MIR
MIRION TECHNOLOGIES, INC.
SALE
Chief Financial Officer
75,000574,935May 21, 2025May 23, 2025View →
MIR
MIRION TECHNOLOGIES, INC.
SALE
Chief Financial Officer
29,149$17.43$508.1K919,432May 14, 2025May 16, 2025View →
MIR
MIRION TECHNOLOGIES, INC.
PURCHASEGRANT
Stock grant
65,154948,581May 14, 2025May 16, 2025View →
MIR
MIRION TECHNOLOGIES, INC.
SALE
Chief Financial Officer
14,801$14.50$214.6K883,427Apr 1, 2025Apr 3, 2025View →
MIR
MIRION TECHNOLOGIES, INC.
SALE
Chief Financial Officer
8,983$15.53$139.5K898,228Mar 1, 2025Mar 4, 2025View →
MIR
MIRION TECHNOLOGIES, INC.
PURCHASEGRANT
Stock grant
35,820923,615Feb 25, 2025Feb 27, 2025View →
MIR
MIRION TECHNOLOGIES, INC.
SALE
Chief Financial Officer
16,404$15.10$247.7K907,211Feb 25, 2025Feb 27, 2025View →
MIR
MIRION TECHNOLOGIES, INC.
SALE
Chief Financial Officer
8,538$18.10$154.5K887,795Dec 27, 2024Dec 31, 2024View →
MIR
MIRION TECHNOLOGIES, INC.
SALE
Chief Financial Officer
525,0000Dec 17, 2024Dec 19, 2024View →
MIR
MIRION TECHNOLOGIES, INC.
PURCHASE
Chief Financial Officer
525,000896,333Dec 17, 2024Dec 19, 2024View →
MIR
MIRION TECHNOLOGIES, INC.
PURCHASE
Chief Financial Officer
175,000371,333Nov 12, 2024Nov 14, 2024View →
MIR
MIRION TECHNOLOGIES, INC.
SALE
Chief Financial Officer
175,000525,000Nov 12, 2024Nov 14, 2024View →
MIR
MIRION TECHNOLOGIES, INC.
SALE
Chief Financial Officer
14,834$11.37$168.7K196,333Apr 1, 2024Apr 3, 2024View →
MIR
MIRION TECHNOLOGIES, INC.
SALE10b5-1
10b5-1 plan
90,910$11.00$1.00M211,167Mar 20, 2024Mar 21, 2024View →
MIR
MIRION TECHNOLOGIES, INC.
PURCHASEGRANT
Stock grant
90,910302,077Mar 20, 2024Mar 21, 2024View →
MIR
MIRION TECHNOLOGIES, INC.
SALE
Chief Financial Officer
90,910649,935Mar 20, 2024Mar 21, 2024View →
MIR
MIRION TECHNOLOGIES, INC.
PURCHASEGRANT
Stock grant
60,240211,167Mar 1, 2024Mar 5, 2024View →
MIR
MIRION TECHNOLOGIES, INC.
SALE
Chief Financial Officer
8,606$10.45$89.9K150,927Dec 27, 2023Dec 28, 2023View →
MIR
MIRION TECHNOLOGIES, INC.
SALE
Chief Financial Officer
7,451$8.54$63.6K159,533Apr 1, 2023Apr 4, 2023View →
MIR
MIRION TECHNOLOGIES, INC.
PURCHASEGRANT
Stock grant
49,689166,984Mar 29, 2023Mar 31, 2023View →
MIR
MIRION TECHNOLOGIES, INC.
SALE
Chief Financial Officer
8,606$6.49$55.9K117,295Dec 27, 2022Dec 28, 2022View →
MIR
MIRION TECHNOLOGIES, INC.
PURCHASEGRANT
Stock grant
49,566866,746Apr 1, 2022Apr 5, 2022View →
MIR
MIRION TECHNOLOGIES, INC.
PURCHASEGRANT
Stock grant
76,335817,180Dec 27, 2021Jan 3, 2022View →
MIR
MIRION TECHNOLOGIES, INC.
PURCHASEGRANT
Stock grant
76,335817,180Dec 27, 2021Dec 29, 2021View →
MIR
MIRION TECHNOLOGIES, INC.
PURCHASEGRANT
Stock grant
740,845740,845Oct 20, 2021Oct 22, 2021View →
Other insiders · MIR
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About this filer
CIK 0001885701
ROLE
Chief Financial Officer
PRIMARY
MIR
COMPANIES
1
ACTIVE SINCE
Oct 2021
MARKETPEEL · /INSIDER/0001885701DATA · SEC EDGAR · FORM 4 · CONSOLIDATED TAPE
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