Stepien Thomas M
Chief Executive Officer
Stepien Thomas M has filed 7 SEC Form 4 filings (16 transaction rows) across 1 company, with disclosures dating back to 2025. 7 of those filings fall inside the rolling window. Most recent filing: Aug 25, 2026.
On the most recent filing, Stepien Thomas M is listed as Chief Executive Officer at Amprius Technologies, Inc. Inside the rolling window, Stepien Thomas M reported no open-market purchases and 5 open-market sales totaling $1.3M in AMPX. The largest disclosed transaction in the window is a sale of 60,702 AMPX shares on May 21, 2026, worth $898K.
Companies traded
Other insiders at AMPX
Insider Buying
$0
reported purchases (SEC code P)
Insider Selling
$1.3M
reported sales (SEC code S)
Companies
1
in the rolling window
Frequently asked questions
How many SEC Form 4 filings has Stepien Thomas M made?
Stepien Thomas M has filed 7 SEC Form 4 filings (16 transaction rows) across 1 company since 2025.
Which companies does Stepien Thomas M trade?
Stepien Thomas M has filed SEC Form 4 disclosures for 1 company, including AMPX.
When was Stepien Thomas M's most recent SEC Form 4 filing?
Stepien Thomas M's most recent SEC Form 4 filing on Tracefour is dated Aug 25, 2026.
What is Stepien Thomas M's job title?
On the most recent SEC Form 4 filings tracked by Tracefour, Stepien Thomas M is listed as Chief Executive Officer.
What is Stepien Thomas M's total buy and sell value in the current window?
Inside the rolling retention window, Stepien Thomas M bought $0 and sold $1.3M based on SEC Form 4 filings.
What was Stepien Thomas M's largest disclosed transaction?
The largest disclosed transaction in the current window is a sale of 60,702 AMPX shares on 2026-05-21, worth $898K, per SEC Form 4 filings.