MarketPeel
Insider Trading Intelligence
TS

Thomas M. Stepien

AMPX
CHIEF EXECUTIVE OFFICER · AMPRIUS TECHNOLOGIES, INC. · CIK 0002067233
FILING MIX · LIFETIME50%/50%
BUYS
5
SELLS
5
TOTAL VALUE
$1.01M
COMPANIES
1
ACTIVE SINCE
May 2025
HOLDINGS NOW
36,914
AVG SELL PX
$15.13
TRADE KIND
SHOWING 10 / 10
Trades · vs SPY
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Performance · forward returns vs SPY
No backtest data available for Thomas M. Stepien. Backtests are computed for purchase (P) and sale (S) transactions with resolvable price history.
Holdings over time
AMPX · 36,914 shares · as of Jun 4, 2026
0190,000380,000570,000760,0002026SHARES HELD
Trading cadence · quarterly flow
BUY SELL
2025
2025
2025
2026
2026
FLOW · 5 buys / 5 sellsCOVERAGE · 5 quarters
Form 4 filings · all activity
COMPANYTYPESHARESPRICEVALUEHELD AFTERTRADE DATEFILEDDETAILS
AMPX
AMPRIUS TECHNOLOGIES, INC.
PURCHASEGRANT
Gift
36,91436,914Jun 4, 2026Jun 5, 2026View →
AMPX
AMPRIUS TECHNOLOGIES, INC.
SALEGRANT
Gift
36,914627,625Jun 4, 2026Jun 5, 2026View →
AMPX
AMPRIUS TECHNOLOGIES, INC.
SALEGRANT
Gift
30,384664,539Jun 4, 2026Jun 5, 2026View →
AMPX
AMPRIUS TECHNOLOGIES, INC.
SALE
Chief Executive Officer
2,000$20.97$41.9K625,625Jun 4, 2026Jun 5, 2026View →
AMPX
AMPRIUS TECHNOLOGIES, INC.
SALE
Chief Executive Officer
4,375$17.19$75.2K694,923May 27, 2026May 28, 2026View →
AMPX
AMPRIUS TECHNOLOGIES, INC.
SALE
Chief Executive Officer
60,702$14.79$897.7K699,298May 21, 2026May 26, 2026View →
AMPX
AMPRIUS TECHNOLOGIES, INC.
PURCHASEGRANT
Stock grant
150,000760,000Mar 4, 2026Mar 6, 2026View →
AMPX
AMPRIUS TECHNOLOGIES, INC.
PURCHASEGRANT
Stock grant
200,000610,000Dec 19, 2025Dec 22, 2025View →
AMPX
AMPRIUS TECHNOLOGIES, INC.
PURCHASEGRANT
Stock grant
200,000760,000Dec 19, 2025May 7, 2026View →
AMPX
AMPRIUS TECHNOLOGIES, INC.
PURCHASEGRANT
Stock grant
400,000400,000May 1, 2025May 6, 2025View →
Other insiders · AMPX
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About this filer
CIK 0002067233
ROLE
Chief Executive Officer
PRIMARY
AMPX
COMPANIES
1
ACTIVE SINCE
May 2025
MARKETPEEL · /INSIDER/0002067233DATA · SEC EDGAR · FORM 4 · CONSOLIDATED TAPE
FREE · DAILY · 6 AM ET

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