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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 460m ago
HOUSE PTR59m ago
SEC 13F59m ago
ROBINHOOD CHAIN59m ago
Corporate insider
SI

Stefan Constantin Ionel

Chief Technology OfficerCIK 0001940928

EDGAR filingsOpen in network
Disclosed transactions30
Buys / sells0 / 9
Max Insider Score34
Connections1with evidence

Disclosed transactions

ScoreActorSecuritySideValueExecutedDisclosedLagSourceEvidence
25
SI
Stefan Constantin IonelChief Technology Officer
AMPXAmprius Technologies, Inc.
Open-market sale
SELL$307K
29.7K sh
Aug 21, 2026Aug 25, 2026
traded Aug 21, 2026
+4dSEC FORM 4

Evidence

Verified connections

  • Insider ofevidence
    Amprius Technologies, Inc.Chief Technology Officer · Nov 25, 2025
22
SI
Stefan Constantin IonelChief Technology Officer
AMPXAmprius Technologies, Inc.
Open-market sale
SELL
$55K
3,208 sh
May 27, 2026
May 28, 2026
traded May 27, 2026
+1d
SEC FORM 4

Evidence

31
SI
Stefan Constantin IonelChief Technology Officer
AMPXAmprius Technologies, Inc.
Open-market sale
SELL$426K
28.8K sh
May 21, 2026May 26, 2026
traded May 21, 2026
+5dSEC FORM 4

Evidence

6
SI
Stefan Constantin IonelChief Technology Officer
AMPXAmprius Technologies, Inc.
Grant or award
A—
110.0K sh
Mar 4, 2026Mar 6, 2026
traded Mar 4, 2026
+2dSEC FORM 4

Evidence

5
SI
Stefan Constantin IonelChief Technology Officer
AMPXAmprius Technologies, Inc.
Option exercise
M—
90 sh
Jan 28, 2026Jan 30, 2026
traded Jan 28, 2026
+2dSEC FORM 4

Evidence

27
SI
Stefan Constantin IonelChief Technology Officer
AMPXAmprius Technologies, Inc.
Open-market sale
SELL$476K
39.7K sh
Jan 28, 2026Jan 30, 2026
traded Jan 28, 2026
+2dSEC FORM 4

Evidence

5
SI
Stefan Constantin IonelChief Technology Officer
AMPXAmprius Technologies, Inc.
Option exercise
M—
39.6K sh
Jan 28, 2026Jan 30, 2026
traded Jan 28, 2026
+2dSEC FORM 4

Evidence

5
SI
Stefan Constantin IonelChief Technology Officer
AMPXAmprius Technologies, Inc.
Option exercise
M$55.8
90 sh
Jan 28, 2026Jan 30, 2026
traded Jan 28, 2026
+2dSEC FORM 4

Evidence

9
SI
Stefan Constantin IonelChief Technology Officer
AMPXAmprius Technologies, Inc.
Option exercise
M$1,980
39.6K sh
Jan 28, 2026Jan 30, 2026
traded Jan 28, 2026
+2dSEC FORM 4

Evidence

13
SI
Stefan Constantin IonelChief Technology Officer
AMPXAmprius Technologies, Inc.
Option exercise
M$13K
253.9K sh
Jan 22, 2026Jan 23, 2026
traded Jan 22, 2026
+1dSEC FORM 4

Evidence

9
SI
Stefan Constantin IonelChief Technology Officer
AMPXAmprius Technologies, Inc.
Option exercise
M$8,305
166.1K sh
Jan 22, 2026Jan 23, 2026
traded Jan 22, 2026
+1dSEC FORM 4

Evidence

9
SI
Stefan Constantin IonelChief Technology Officer
AMPXAmprius Technologies, Inc.
Option exercise
M—
15.8K sh
Jan 21, 2026Jan 23, 2026
traded Jan 21, 2026
+2dSEC FORM 4

Evidence

9
SI
Stefan Constantin IonelChief Technology Officer
AMPXAmprius Technologies, Inc.
Option exercise
M—
15.9K sh
Jan 21, 2026Jan 23, 2026
traded Jan 21, 2026
+2dSEC FORM 4

Evidence

5
SI
Stefan Constantin IonelChief Technology Officer
AMPXAmprius Technologies, Inc.
Option exercise
M—
253.9K sh
Jan 22, 2026Jan 23, 2026
traded Jan 22, 2026
+1dSEC FORM 4

Evidence

5
SI
Stefan Constantin IonelChief Technology Officer
AMPXAmprius Technologies, Inc.
Option exercise
M—
72.8K sh
Jan 22, 2026Jan 23, 2026
traded Jan 22, 2026
+1dSEC FORM 4

Evidence

5
SI
Stefan Constantin IonelChief Technology Officer
AMPXAmprius Technologies, Inc.
Option exercise
M—
166.1K sh
Jan 22, 2026Jan 23, 2026
traded Jan 22, 2026
+1dSEC FORM 4

Evidence

5
SI
Stefan Constantin IonelChief Technology Officer
AMPXAmprius Technologies, Inc.
Option exercise
M—
1,600 sh
Jan 23, 2026Jan 23, 2026
traded Jan 23, 2026
+0dSEC FORM 4

Evidence

34
SI
Stefan Constantin IonelChief Technology Officer
AMPXAmprius Technologies, Inc.
Open-market sale
SELL$5.93M
492.8K sh
Jan 22, 2026Jan 23, 2026
traded Jan 22, 2026
+1dSEC FORM 4

Evidence

17
SI
Stefan Constantin IonelChief Technology Officer
AMPXAmprius Technologies, Inc.
Open-market sale
SELL$19K
1,600 sh
Jan 23, 2026Jan 23, 2026
traded Jan 23, 2026
+0dSEC FORM 4

Evidence

5
SI
Stefan Constantin IonelChief Technology Officer
AMPXAmprius Technologies, Inc.
Option exercise
M—
41.6K sh
Jan 21, 2026Jan 23, 2026
traded Jan 21, 2026
+2dSEC FORM 4

Evidence

9
SI
Stefan Constantin IonelChief Technology Officer
AMPXAmprius Technologies, Inc.
Option exercise
M$33K
72.8K sh
Jan 22, 2026Jan 23, 2026
traded Jan 22, 2026
+1dSEC FORM 4

Evidence

5
SI
Stefan Constantin IonelChief Technology Officer
AMPXAmprius Technologies, Inc.
Option exercise
M$80
1,600 sh
Jan 23, 2026Jan 23, 2026
traded Jan 23, 2026
+0dSEC FORM 4

Evidence

27
SI
Stefan Constantin IonelChief Technology Officer
AMPXAmprius Technologies, Inc.
Open-market sale
SELL$879K
73.3K sh
Jan 21, 2026Jan 23, 2026
traded Jan 21, 2026
+2dSEC FORM 4

Evidence

9
SI
Stefan Constantin IonelChief Technology Officer
AMPXAmprius Technologies, Inc.
Option exercise
M$26K
41.6K sh
Jan 21, 2026Jan 23, 2026
traded Jan 21, 2026
+2dSEC FORM 4

Evidence

5
SI
Stefan Constantin IonelChief Technology Officer
AMPXAmprius Technologies, Inc.
Option exercise
M$792
15.8K sh
Jan 21, 2026Jan 23, 2026
traded Jan 21, 2026
+2dSEC FORM 4

Evidence

5
SI
Stefan Constantin IonelChief Technology Officer
AMPXAmprius Technologies, Inc.
Option exercise
M$794
15.9K sh
Jan 21, 2026Jan 23, 2026
traded Jan 21, 2026
+2dSEC FORM 4

Evidence

9
SI
Stefan Constantin IonelChief Technology Officer
AMPXAmprius Technologies, Inc.
Option exercise
M$6,250
125.0K sh
Dec 11, 2025Dec 15, 2025
traded Dec 11, 2025
+4dSEC FORM 4

Evidence

17
SI
Stefan Constantin IonelChief Technology Officer
AMPXAmprius Technologies, Inc.
Option exercise
M—
125.0K sh
Dec 11, 2025Dec 15, 2025
traded Dec 11, 2025
+4dSEC FORM 4

Evidence

34
SI
Stefan Constantin IonelChief Technology Officer
AMPXAmprius Technologies, Inc.
Open-market sale
SELL$2.08M
198.3K sh
Dec 11, 2025Dec 15, 2025
traded Dec 11, 2025
+4dSEC FORM 4

Evidence

27
SI
Stefan Constantin IonelChief Technology Officer
AMPXAmprius Technologies, Inc.
Open-market sale
SELL$252K
25.0K sh
Nov 21, 2025Nov 25, 2025
traded Nov 21, 2025
+4dSEC FORM 4

Evidence