Stefan Constantin Ionel - Insider Non-Derivative Transactions at Amprius Technologies, Inc. (AMPX) - (SEC)

Updated on January 3, 2026.

According to recent SEC insider information filed on Dec 11, 2025, Stefan Constantin Ionel's relationship to Amprius Technologies, Inc. (AMPX) is Officer (Chief Technology Officer), and currently has 946,951 shares of Common stock.

The chart below shows the number of shares owned, and the table shows the recent insider transactions.

You can see similar information for other AMPX insiders.

Related Topics: SEC Topic List.

Data Source: SEC.

Stefan Constantin Ionel - Insider Non-Derivative Transactions of AMPX Common stock

Stefan Constantin Ionel - Insider Non-Derivative Transactions at AMPX

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Date	Transaction	No. of Shares	Price Per Share	Shares Owned After Transactions
Dec 12, 2025	Sell -- (Common stock)	198255	10.51	748696
Dec 12, 2025	M -- (Common stock)	125000	0.05	946951
Nov 22, 2025	Sell -- (Common stock)	25024	10.08	821951
Aug 22, 2025	Sell -- (Common stock)	19159	6.82	846975
May 22, 2025	Sell -- (Common stock)	20366	2.43	866134
Mar 20, 2025	Acquisition -- (Common stock)	461540	0	886500
Mar 15, 2025	M -- (Common stock)	3471	0.98	424960
Feb 22, 2025	Sell -- (Common stock)	9066	3.13	421489
Nov 22, 2024	Sell -- (Common stock)	8575	1.96	430555
Aug 22, 2024	Sell -- (Common stock)	8800	1.04	386168
May 23, 2024	Sell -- (Common stock)	4121	1.36	394968
May 22, 2024	Sell -- (Common stock)	5272	1.33	399089
Mar 20, 2024	Acquisition -- (Common stock)	374570	0	404361
Sep 16, 2023	Sell -- (Common stock)	33630	3.89	29791
Sep 15, 2023	Sell -- (Common stock)	46370	3.66	63421
Sep 10, 2023	M -- (Common stock)	80000	0.05	109791
Dec 15, 2022	F -- (Common stock)	209	7.2	29791