InsiderTrades

Stepien Thomas M

SEC CIK 2067233 · EDGAR

Buying vs selling by month open-market trades, last 24 months, AMPX
BoughtSold

Companies

TickerCompanyTitleHoldingBoughtSoldTradesFirstLast
AMPXAmprius Technologies, Inc.Pres, Dir 578.8K — $1.34M 122025-05-012026-08-25

Most active insiders at AMPX, 12 months

#InsiderTitleBoughtSold
1 Sun KangDir —$57.63M
2 Stefan Constantin IonelCTO —$10.69M
3 HSIEH Wen HsuanDir —$7.62M
4 Chu StevenDir —$5.86M
5 DIXON DONALD RDir —$2.54M
6 Stepien Thomas MPres, Dir —$1.34M
7 RODRIGUEZ RICARDO C.CFO ——
8 SATTERTHWAITE LIVINGSTONDir ——
9 BAYLESS KATHLEEN ADir ——

Transactions 12

Type
Reset
X Filed Traded Ticker Company Insider Title Type Price Qty Owned ΔOwn Value
M 2026-08-25 17:21 2026-08-21+ AMPX Amprius Technologies, Inc. Stepien Thomas M CEO, Dir S - Sale $10.26 -31.5K 594.1K -5% -$323.6K
M 2026-08-25 17:21 2026-08-25 AMPX Amprius Technologies, Inc. Stepien Thomas M CEO, Dir G - Gift $0.00 -15.3K 578.8K -3% $0
I 2026-08-25 17:21 2026-08-25 AMPX Amprius Technologies, Inc. Stepien Thomas M CEO, Dir A - Grant $0.00 +346 37.3K +0.9% $0
M 2026-06-05 16:57 2026-06-04 AMPX Amprius Technologies, Inc. Stepien Thomas M CEO, Dir G - Gift $0.00 -67.3K 627.6K -10% $0
I 2026-06-05 16:57 2026-06-04 AMPX Amprius Technologies, Inc. Stepien Thomas M CEO, Dir G - Gift $0.00 +36.9K 36.9K New $0
2026-06-05 16:57 2026-06-04 AMPX Amprius Technologies, Inc. Stepien Thomas M CEO, Dir S - Sale $20.97 -2,000 625.6K -0.3% -$41.9K
2026-05-28 18:22 2026-05-27 AMPX Amprius Technologies, Inc. Stepien Thomas M CEO, Dir S - Sale $17.19 -4,375 694.9K -0.6% -$75.2K
2026-05-26 19:03 2026-05-21 AMPX Amprius Technologies, Inc. Stepien Thomas M CEO, Dir S - Sale $14.79 -60.7K 699.3K -8% -$897.7K
A 2026-05-07 16:53 2025-12-19 AMPX Amprius Technologies, Inc. Stepien Thomas M CEO, Dir A - Grant $0.00 +200.0K 760.0K +36% $0
2026-03-06 2026-03-04 AMPX Amprius Technologies, Inc. Stepien Thomas M CEO, Dir A - Grant $0.00 +150.0K 760.0K +25% $0
2025-12-22 2025-12-19 AMPX Amprius Technologies, Inc. Stepien Thomas M Pres, Dir A - Grant $0.00 +200.0K 610.0K +49% $0
2025-05-06 2025-05-01 AMPX Amprius Technologies, Inc. Stepien Thomas M Pres, Dir A - Grant $0.00 +400.0K 400.0K New $0

Purchase Sale Sale after option exercise All abbreviations