MarketPeel
Insider Trading Intelligence
LB

Linda M. Biles

MPTI
EXECUTIVE VP - FINANCE · M-TRON INDUSTRIES, INC. · CIK 0001823023
FILING MIX · LIFETIME61%/39%
BUYS
11
SELLS
7
TOTAL VALUE
$549.8K
COMPANIES
2
ACTIVE SINCE
Dec 2020
HOLDINGS NOW
47,196
AVG SELL PX
$28.47
TRADE KIND
SHOWING 18 / 18
Trades · vs SPY
Loading price series…
Performance · forward returns vs SPY
5 backtested trades · 8 horizons · 20 pendingHow are these numbers computed? →
Forward-return performance of every backtestable P/S trade by Linda M. Biles, 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+40.00%-3.20%+2.06%-5.26%-8.00%
14d5+40.00%-3.43%+3.00%-6.43%-8.54%
30d5+40.00%+19.53%+7.29%+10.22%+10.14%
60d5+40.00%+40.16%+6.52%+33.64%+37.15%
90d5(5 pending)
180d5(5 pending)
1y5(5 pending)
2y5(5 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
MPTI · 28,376 shares · as of May 4, 2026
07,35114,70122,05229,4022023202420252026SHARES HELD
Trading cadence · quarterly flow
BUY SELL
2020
2021
2021
2021
2021
2022
2022
2022
2022
2023
2023
2023
2023
2024
2024
2024
2024
2025
2025
2025
2025
2026
2026
FLOW · 11 buys / 7 sellsCOVERAGE · 23 quarters
Form 4 filings · all activity
COMPANYTYPESHARESPRICEVALUEHELD AFTERTRADE DATEFILEDDETAILS
MPTI
M-TRON INDUSTRIES, INC.
SALE
Executive VP - Finance
306$66.78$20.4K28,376May 4, 2026May 6, 2026View →
MPTI
M-TRON INDUSTRIES, INC.
SALE
Executive VP - Finance
2,70024,643Apr 14, 2026Apr 15, 2026View →
MPTI
M-TRON INDUSTRIES, INC.
SALE
Executive VP - Finance
72028,682Apr 14, 2026Apr 15, 2026View →
MPTI
M-TRON INDUSTRIES, INC.
PURCHASE
Executive VP - Finance
2,7000Apr 14, 2026Apr 29, 2026View →
MPTI
M-TRON INDUSTRIES, INC.
PURCHASE
Executive VP - Finance
24,6432,700Apr 9, 2026Apr 29, 2026View →
MPTI
M-TRON INDUSTRIES, INC.
PURCHASEGRANT
Stock grant
2,05929,402Apr 2, 2026Apr 7, 2026View →
LGL
LGL GROUP INC
PURCHASEGRANT
Stock grant
10,00018,820Jan 16, 2026Jan 21, 2026View →
MPTI
M-TRON INDUSTRIES, INC.
SALE
Executive VP - Finance
61727,343Aug 11, 2025Apr 7, 2026View →
MPTI
M-TRON INDUSTRIES, INC.
PURCHASEGRANT
Stock grant
10,00010,000Apr 4, 2025Apr 8, 2025View →
MPTI
M-TRON INDUSTRIES, INC.
PURCHASEGRANT
Stock grant
10,000$23.90$239.0K27,960Apr 19, 2024Apr 23, 2024View →
MPTI
M-TRON INDUSTRIES, INC.
SALE
V.P. Controller
1,539$35.70$54.9K17,960Dec 29, 2023Jan 3, 2024View →
MPTI
M-TRON INDUSTRIES, INC.
PURCHASEGRANT
Stock grant
9,000$11.30$101.7K19,499Aug 9, 2023Aug 11, 2023View →
MPTI
M-TRON INDUSTRIES, INC.
PURCHASEGRANT
Stock grant
7,217$13.10$94.5K11,627Oct 7, 2022Oct 12, 2022View →
LGL
LGL GROUP INC
SALE
VP, Controller
7,5338,820Oct 7, 2022Oct 12, 2022View →
LGL
LGL GROUP INC
SALE
VP/Controller
1,358$11.65$15.8K16,353Dec 29, 2021Dec 30, 2021View →
LGL
LGL GROUP INC
PURCHASE
VP/Controller
3,000$3.90$11.7K17,711Aug 25, 2021Aug 27, 2021View →
LGL
LGL GROUP INC
PURCHASE
VP/Controller
3,000$3.90$11.7K0Aug 25, 2021Aug 27, 2021View →
LGL
LGL GROUP INC
PURCHASEGRANT
Stock grant
10,76214,711Dec 29, 2020Dec 31, 2020View →
Other insiders · MPTI
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About this filer
CIK 0001823023
ROLE
Executive VP - Finance
PRIMARY
MPTI
COMPANIES
2
ACTIVE SINCE
Dec 2020
MARKETPEEL · /INSIDER/0001823023DATA · SEC EDGAR · FORM 4 · CONSOLIDATED TAPE
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