Stepien Thomas M

Insider

Chief Executive Officer

Trades at: AMPX

30D 90D 1Y

Net shares · 90d

-67.1K

0 buy · 67.1K sell

Net value · 90d

-$1.0M

$0 in · $1.0M out

Sentiment · 90d

Net selling

0% buying · 100% selling

Open-market trades · 90d

0 buy · 67.1K sell

Net buy / sell volume (all companies)

Tap or hover the chart for daily net volume. Green = net buying, red = net selling.

All transactions

Show open-market only

AMPX Sell·S
Jun 4, 26

Chief Executive Officer

$41.9K

2.0K sh · $20.97

Own -0%
AMPX Other·G
Jun 4, 26

Chief Executive Officer

$0

36.9K sh

Own -50%
AMPX Other·G
Jun 4, 26

Chief Executive Officer

$0

36.9K sh

Own -6%
AMPX Other·G
Jun 4, 26

Chief Executive Officer

$0

30.4K sh

Own -4%
AMPX Sell·S
May 27, 26

Chief Executive Officer

$75.2K

4.4K sh · $17.19

Own -1%
AMPX Sell·S
May 21, 26

Chief Executive Officer

$897.7K

60.7K sh · $14.79

Own -8%

Date▾	Ticker	Role	Type	Shares	Own Δ	Price	Value
Jun 4, 2026	AMPX	Chief Executive Officer	Sell S	2.0K	-0%	$20.97	$41.9K
Jun 4, 2026	AMPX	Chief Executive Officer	Other G	36.9K	-50%	—	$0
Jun 4, 2026	AMPX	Chief Executive Officer	Other G	36.9K	-6%	—	$0
Jun 4, 2026	AMPX	Chief Executive Officer	Other G	30.4K	-4%	—	$0
May 27, 2026	AMPX	Chief Executive Officer	Sell S	4.4K	-1%	$17.19	$75.2K
May 21, 2026	AMPX	Chief Executive Officer	Sell S	60.7K	-8%	$14.79	$897.7K

About Stepien Thomas M

This profile aggregates every SEC Form 4 insider transaction reported by Stepien Thomas M across all companies they trade. Open-market purchases (code P) and sales (code S) are the highest-signal, discretionary trades; grants (A), option exercises (M) and gifts (G) reflect compensation rather than conviction and carry no market price. Figures cover the selected period and update as new filings are ingested.