INSIDER
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Data sources

Public disclosures only. Scores flag unusual patterns and are not evidence of wrongdoing. Not investment advice.

RH CHAIN…
OverviewFollow the MoneyDaily BriefLiveCongressCorporate InsidersGovernment MoneyPolitical InfluenceInstitutionsWashington NetworkFollow the PowerDisclosure ClockAI InvestigatorWatchlistConvergenceINSIDER AlphaSignal ledgerHistorical ReplayRobinhood ChainProofTradingTokenProAccountMethodologyMatch reviewLaunch readiness
01Overview02Follow the Money03Daily Brief04Live05Congress06Corporate Insiders07Government Money08Political Influence09Institutions10Washington Network11Follow the Power12Disclosure Clock13AI Investigator14Watchlist
ConvergenceINSIDER AlphaSignal ledgerHistorical ReplayRobinhood ChainProofTradingTokenProAccountMethodologyMatch reviewLaunch readiness
OverviewFollow the MoneyDaily BriefLiveCongressCorporate InsidersGovernment MoneyPolitical InfluenceInstitutionsWashington NetworkFollow the PowerDisclosure ClockAI InvestigatorWatchlistConvergenceINSIDER AlphaSignal ledgerHistorical ReplayRobinhood ChainProofTradingTokenProAccountMethodologyMatch reviewLaunch readiness
Data sources
SEC FORM 438m ago
HOUSE PTR37m ago
SEC 13F37m ago
ROBINHOOD CHAIN37m ago
Corporate insider
SM

Stepien Thomas M

Director, PresidentCIK 0002067233

EDGAR filingsOpen in network
Disclosed transactions15
Buys / sells0 / 5
Max Insider Score42
Connections1with evidence

Disclosed transactions

ScoreActorSecuritySideValueExecutedDisclosedLagSourceEvidence
8
SM
Stepien Thomas MDirector, Chief Executive Officer
AMPXAmprius Technologies, Inc.
Gift
G—
5,000 sh
Aug 25, 2026Aug 25, 2026
traded Aug 25, 2026
+0dSEC FORM 4

Evidence

Verified connections

  • Insider ofevidence
    Amprius Technologies, Inc.Director, President · Dec 22, 2025
5
SM
Stepien Thomas MDirector, Chief Executive Officer
AMPXAmprius Technologies, Inc.
Grant or award
A
—
346 sh
Aug 25, 2026
Aug 25, 2026
traded Aug 25, 2026
+0d
SEC FORM 4

Evidence

8
SM
Stepien Thomas MDirector, Chief Executive Officer
AMPXAmprius Technologies, Inc.
Gift
G—
5,000 sh
Aug 25, 2026Aug 25, 2026
traded Aug 25, 2026
+0dSEC FORM 4

Evidence

25
SM
Stepien Thomas MDirector, Chief Executive Officer
AMPXAmprius Technologies, Inc.
Open-market sale
SELL$243K
23.5K sh
Aug 21, 2026Aug 25, 2026
traded Aug 21, 2026
+4dSEC FORM 4

Evidence

8
SM
Stepien Thomas MDirector, Chief Executive Officer
AMPXAmprius Technologies, Inc.
Gift
G—
5,000 sh
Aug 25, 2026Aug 25, 2026
traded Aug 25, 2026
+0dSEC FORM 4

Evidence

25
SM
Stepien Thomas MDirector, Chief Executive Officer
AMPXAmprius Technologies, Inc.
Open-market sale
SELL$80K
8,000 sh
Aug 24, 2026Aug 25, 2026
traded Aug 24, 2026
+1dSEC FORM 4

Evidence

8
SM
Stepien Thomas MDirector, Chief Executive Officer
AMPXAmprius Technologies, Inc.
Gift
G—
346 sh
Aug 25, 2026Aug 25, 2026
traded Aug 25, 2026
+0dSEC FORM 4

Evidence

12
SM
Stepien Thomas MDirector, Chief Executive Officer
AMPXAmprius Technologies, Inc.
Gift
G—
36.9K sh
Jun 4, 2026Jun 5, 2026
traded Jun 4, 2026
+1dSEC FORM 4

Evidence

22
SM
Stepien Thomas MDirector, Chief Executive Officer
AMPXAmprius Technologies, Inc.
Open-market sale
SELL$42K
2,000 sh
Jun 4, 2026Jun 5, 2026
traded Jun 4, 2026
+1dSEC FORM 4

Evidence

8
SM
Stepien Thomas MDirector, Chief Executive Officer
AMPXAmprius Technologies, Inc.
Gift
G—
36.9K sh
Jun 4, 2026Jun 5, 2026
traded Jun 4, 2026
+1dSEC FORM 4

Evidence

8
SM
Stepien Thomas MDirector, Chief Executive Officer
AMPXAmprius Technologies, Inc.
Gift
G—
30.4K sh
Jun 4, 2026Jun 5, 2026
traded Jun 4, 2026
+1dSEC FORM 4

Evidence

25
SM
Stepien Thomas MDirector, Chief Executive Officer
AMPXAmprius Technologies, Inc.
Open-market sale
SELL$75K
4,375 sh
May 27, 2026May 28, 2026
traded May 27, 2026
+1dSEC FORM 4

Evidence

42
SM
Stepien Thomas MDirector, Chief Executive Officer
AMPXAmprius Technologies, Inc.
Open-market sale
SELL$898K
60.7K sh
May 21, 2026May 26, 2026
traded May 21, 2026
+5dSEC FORM 4

Evidence

17
SM
Stepien Thomas MDirector, Chief Executive Officer
AMPXAmprius Technologies, Inc.
Grant or award
A—
150.0K sh
Mar 4, 2026Mar 6, 2026
traded Mar 4, 2026
+2dSEC FORM 4

Evidence

17
SM
Stepien Thomas MDirector, President
AMPXAmprius Technologies, Inc.
Grant or award
A—
200.0K sh
Dec 19, 2025Dec 22, 2025
traded Dec 19, 2025
+3dSEC FORM 4

Evidence