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Insider Trading Intelligence
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Stephen M. Spinelli

NSSC
SENIOR VICE PRESIDENT OF SALES · NAPCO SECURITY TECHNOLOGIES, INC · CIK 0001812385
FILING MIX · LIFETIME27%/73%
BUYS
3
SELLS
8
TOTAL VALUE
$2.34M
COMPANIES
1
ACTIVE SINCE
Aug 2022
HOLDINGS NOW
14,900
AVG SELL PX
$32.71
TRADE KIND
SHOWING 11 / 11
Trades · vs SPY
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Performance · forward returns vs SPY
4 backtested trades · 8 horizons · 3 pendingHow are these numbers computed? →
Forward-return performance of every backtestable P/S trade by Stephen M. Spinelli, 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
7d4+100.00%-3.46%-0.15%-3.31%-3.29%
14d4+50.00%-1.55%+0.55%-2.10%-1.15%
30d4+0.00%+3.33%+1.66%+1.68%+1.11%
60d4+25.00%+4.32%+2.87%+1.45%+3.63%
90d4+50.00%-0.89%+4.16%-5.05%-10.15%
180d4+75.00%-5.78%+12.08%-17.86%-30.25%
1y4(1 pending)+66.67%-23.45%+14.57%-38.01%-56.09%
2y4(2 pending)+100.00%-28.40%+35.09%-63.49%-63.49%
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
NSSC · 14,900 shares · as of Mar 17, 2026
016,22032,44048,66064,8802023202420252026SHARES HELD
Trading cadence · quarterly flow
BUY SELL
2022
2022
2023
2023
2023
2023
2024
2024
2024
2024
2025
2025
2025
2025
2026
FLOW · 3 buys / 8 sellsCOVERAGE · 15 quarters
Form 4 filings · all activity
COMPANYTYPESHARESPRICEVALUEHELD AFTERTRADE DATEFILEDDETAILS
NSSC
NAPCO SECURITY TECHNOLOGIES, INC
SALE
Senior Vice President of Sales
13,972$10.02$140.0K9,980Mar 17, 2026Mar 19, 2026View →
NSSC
NAPCO SECURITY TECHNOLOGIES, INC
SALE
Senior Vice President of Sales
3,212$43.59$140.0K11,688Mar 17, 2026Mar 19, 2026View →
NSSC
NAPCO SECURITY TECHNOLOGIES, INC
PURCHASE
Senior Vice President of Sales
13,972$10.02$140.0K14,900Mar 17, 2026Mar 19, 2026View →
NSSC
NAPCO SECURITY TECHNOLOGIES, INC
SALE
Senior Vice president of Sales
19,000$40.25$764.8K928Nov 17, 2025Nov 18, 2025View →
NSSC
NAPCO SECURITY TECHNOLOGIES, INC
SALE
Senior Vice President of Sales
5,000$29.16$145.8K19,928Jun 6, 2025Jun 6, 2025View →
NSSC
NAPCO SECURITY TECHNOLOGIES, INC
SALE
Senior Vice President of Sales
2,565$52.14$133.7K24,928Jun 18, 2024Jul 29, 2024View →
NSSC
NAPCO SECURITY TECHNOLOGIES, INC
SALE
Senior Vice President of Sales
435$52.10$22.7K27,493Jun 18, 2024Jul 29, 2024View →
NSSC
NAPCO SECURITY TECHNOLOGIES, INC
SALE
Senior Vice President of Sales
8,000$45.00$360.0K27,928Feb 9, 2024Feb 13, 2024View →
NSSC
NAPCO SECURITY TECHNOLOGIES, INC
PURCHASE
Senior Vice President of Sales
35,928$10.02$360.0K35,928Feb 9, 2024Feb 13, 2024View →
NSSC
NAPCO SECURITY TECHNOLOGIES, INC
SALE
Senior Vice President of Sales
35,92823,952Feb 9, 2024Feb 13, 2024View →
NSSC
NAPCO SECURITY TECHNOLOGIES, INC
PURCHASEGRANT
Stock grant
5,000$26.94$134.7K64,880Aug 25, 2022Aug 31, 2022View →
Other insiders · NSSC
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About this filer
CIK 0001812385
ROLE
Senior Vice President of Sales
PRIMARY
NSSC
COMPANIES
1
ACTIVE SINCE
Aug 2022
MARKETPEEL · /INSIDER/0001812385DATA · SEC EDGAR · FORM 4 · CONSOLIDATED TAPE
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