Constantin Ionel Stefan

Insider Reports History

Location
Fremont, CA
Signature
/s/ Ricardo C. Rodriguez, attorney-in-fact on behalf of Constantin Ionel Stefan
All insider transactions
Transactions in reports broken out by “transaction date” reported in original SEC filing, see here for transactions aggregated across transaction date

Holdings reported by Constantin Ionel Stefan:

Company Role Class Num Shares Value Price $ Report Date Ownership
Amprius Technologies, Inc. Chief Technology Officer Common stock 748,696 $7,867,746 $10.51 11 Dec 2025 Direct
Amprius Technologies, Inc. Chief Technology Officer Stock Option (right to buy) 310,962 11 Dec 2025 Direct

Insider Reports Filed by Constantin Ionel Stefan

Symbol Company Period Transactions Value $ Form Type Role Filing Time
AMPX Amprius Technologies, Inc. 11 Dec 2025 3 -$2,077,132 4 Chief Technology Officer 15 Dec 2025, 18:25
AMPX Amprius Technologies, Inc. 21 Nov 2025 1 -$252,274 4 Chief Technology Officer 25 Nov 2025, 18:55
AMPX Amprius Technologies, Inc. 21 Aug 2025 1 -$130,592 4 Chief Technology Officer 25 Aug 2025, 20:04
AMPX Amprius Technologies, Inc. 21 May 2025 1 -$49,530 4 Chief Technology Officer 23 May 2025, 17:54
AMPX Amprius Technologies, Inc. 19 Mar 2025 1 $0 4 Chief Technology Officer 21 Mar 2025, 16:55
AMPX Amprius Technologies, Inc. 14 Mar 2025 2 +$3,402 4 Chief Technology Officer 18 Mar 2025, 17:07
AMPX Amprius Technologies, Inc. 21 Feb 2025 1 -$28,406 4 Chief Technology Officer 24 Feb 2025, 19:38
AMPX Amprius Technologies, Inc. 21 Nov 2024 1 -$16,846 4 Chief Technology Officer 22 Nov 2024, 16:21
AMPX Amprius Technologies, Inc. 23 Oct 2024 3 $0 4 Chief Technology Officer 25 Oct 2024, 18:33
AMPX Amprius Technologies, Inc. 21 Aug 2024 1 -$9,152 4 Chief Technology Officer 22 Aug 2024, 16:57
AMPX Amprius Technologies, Inc. 21 May 2024 2 -$12,587 4 Chief Technology Officer 24 May 2024, 21:08
AMPX Amprius Technologies, Inc. 19 Mar 2024 1 $0 4 Chief Technology Officer 19 Mar 2024, 19:33
AMPX Amprius Technologies, Inc. 14 Sep 2023 2 -$300,218 4 Chief Technology Officer 18 Sep 2023, 18:40
AMPX Amprius Technologies, Inc. 09 Sep 2023 2 +$4,000 4 Chief Technology Officer 12 Sep 2023, 17:43
AMPX Amprius Technologies, Inc. 14 Dec 2022 1 -$1,505 4 Chief Technology Officer 03 May 2023, 17:30
AMPX Amprius Technologies, Inc. 14 Dec 2022 2 +$1,500 4 Chief Technology Officer 15 Dec 2022, 17:40
AMPX Amprius Technologies, Inc. 14 Sep 2022 5 $0 4 Chief Technology Officer 16 Sep 2022, 19:24
AMPX Amprius Technologies, Inc. 14 Sep 2022 0 $0 3 Chief Technology Officer 16 Sep 2022, 18:55