Stefan Constantin Ionel

Insider CIK 1940928 · AMPX Chief Technology Officer

Track record PRO

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Track record

See how this insider's past purchases performed 30 and 90 days later, and a conviction score on each buy.

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Trades across companies

Ticker	Code	Trade	Filed	Shares	Price	Value	Owned after
AMPX Amprius Technologies, Inc.	S Sale	2026-08-21	2026-08-25	29,681	$10.34	$306.9K	771,629	SEC↗
AMPX Amprius Technologies, Inc.	S Sale	2026-08-21	2026-08-25	29,681	$10.34	$306.9K	771,629	SEC↗
AMPX Amprius Technologies, Inc.	S Sale	2026-05-27	2026-05-28	3,208	$17.19	$55.1K	801,310	SEC↗
AMPX Amprius Technologies, Inc.	S Sale	2026-05-21	2026-05-26	28,812	$14.79	$426.1K	804,518	SEC↗
AMPX Amprius Technologies, Inc.	A Award	2026-03-04	2026-03-06	110,000	—	$0	833,330	SEC↗
AMPX Amprius Technologies, Inc.	S Sale	2026-02-23	2026-02-24	25,366	$10.16	$257.7K	723,330	SEC↗
AMPX Amprius Technologies, Inc.	M Exercise deriv	2026-01-28	2026-01-30	39,600	—	$0	0	SEC↗
AMPX Amprius Technologies, Inc.	M Exercise deriv	2026-01-28	2026-01-30	90	—	$0	0	SEC↗
AMPX Amprius Technologies, Inc.	S Sale	2026-01-28	2026-01-30	39,690	$12.00	$476.3K	748,696	SEC↗
AMPX Amprius Technologies, Inc.	M Exercise	2026-01-28	2026-01-30	90	$0.62	$56	748,786	SEC↗
AMPX Amprius Technologies, Inc.	M Exercise	2026-01-28	2026-01-30	39,600	$0.05	$2.0K	788,386	SEC↗
AMPX Amprius Technologies, Inc.	M Exercise deriv	2026-01-23	2026-01-23	1,600	—	$0	39,600	SEC↗
AMPX Amprius Technologies, Inc.	S Sale	2026-01-23	2026-01-23	1,600	$12.00	$19.2K	748,696	SEC↗
AMPX Amprius Technologies, Inc.	M Exercise	2026-01-23	2026-01-23	1,600	$0.05	$80	750,296	SEC↗
AMPX Amprius Technologies, Inc.	M Exercise deriv	2026-01-22	2026-01-23	166,104	—	$0	0	SEC↗
AMPX Amprius Technologies, Inc.	M Exercise deriv	2026-01-22	2026-01-23	72,795	—	$0	0	SEC↗
AMPX Amprius Technologies, Inc.	M Exercise deriv	2026-01-22	2026-01-23	253,928	—	$0	41,200	SEC↗
AMPX Amprius Technologies, Inc.	M Exercise	2026-01-22	2026-01-23	253,928	$0.05	$12.7K	1,002,624	SEC↗
AMPX Amprius Technologies, Inc.	M Exercise	2026-01-22	2026-01-23	72,795	$0.45	$32.8K	1,075,419	SEC↗
AMPX Amprius Technologies, Inc.	M Exercise	2026-01-22	2026-01-23	166,104	$0.05	$8.3K	1,241,523	SEC↗
AMPX Amprius Technologies, Inc.	S Sale	2026-01-22	2026-01-23	492,827	$12.04	$5.93M	748,696	SEC↗
AMPX Amprius Technologies, Inc.	M Exercise deriv	2026-01-21	2026-01-23	15,883	—	$0	166,104	SEC↗
AMPX Amprius Technologies, Inc.	M Exercise deriv	2026-01-21	2026-01-23	15,834	—	$0	295,128	SEC↗
AMPX Amprius Technologies, Inc.	M Exercise deriv	2026-01-21	2026-01-23	41,563	—	$0	90	SEC↗
AMPX Amprius Technologies, Inc.	M Exercise	2026-01-21	2026-01-23	15,883	$0.05	$794	821,976	SEC↗
AMPX Amprius Technologies, Inc.	S Sale	2026-01-21	2026-01-23	73,280	$12.00	$879.4K	748,696	SEC↗
AMPX Amprius Technologies, Inc.	M Exercise	2026-01-21	2026-01-23	41,563	$0.62	$25.8K	790,259	SEC↗
AMPX Amprius Technologies, Inc.	M Exercise	2026-01-21	2026-01-23	15,834	$0.05	$792	806,093	SEC↗
AMPX Amprius Technologies, Inc.	M Exercise deriv	2025-12-11	2025-12-15	125,000	—	$0	310,962	SEC↗
AMPX Amprius Technologies, Inc.	S Sale	2025-12-11	2025-12-15	198,255	$10.51	$2.08M	748,696	SEC↗
AMPX Amprius Technologies, Inc.	M Exercise	2025-12-11	2025-12-15	125,000	$0.05	$6.3K	946,951	SEC↗
AMPX Amprius Technologies, Inc.	S Sale	2025-11-21	2025-11-25	25,024	$10.08	$252.2K	821,951	SEC↗
AMPX Amprius Technologies, Inc.	S Sale	2025-08-21	2025-08-25	19,159	$6.82	$130.7K	846,975	SEC↗
AMPX Amprius Technologies, Inc.	S Sale	2025-05-21	2025-05-23	20,366	$2.43	$49.5K	866,134	SEC↗
AMPX Amprius Technologies, Inc.	A Award	2025-03-19	2025-03-21	461,540	—	$0	886,500	SEC↗
AMPX Amprius Technologies, Inc.	M Exercise deriv	2025-03-14	2025-03-18	3,471	—	$0	0	SEC↗
AMPX Amprius Technologies, Inc.	M Exercise	2025-03-14	2025-03-18	3,471	$0.98	$3.4K	424,960	SEC↗
AMPX Amprius Technologies, Inc.	S Sale	2025-02-21	2025-02-24	9,066	$3.13	$28.4K	421,489	SEC↗
AMPX Amprius Technologies, Inc.	S Sale	2024-11-21	2024-11-22	8,575	$1.96	$16.8K	430,555	SEC↗
AMPX Amprius Technologies, Inc.	A Award deriv	2024-10-23	2024-10-25	3,471	—	$0	3,471	SEC↗
AMPX Amprius Technologies, Inc.	A Award deriv	2024-10-23	2024-10-25	41,653	—	$0	41,653	SEC↗
AMPX Amprius Technologies, Inc.	A Award deriv	2024-10-23	2024-10-25	139,613	—	$0	139,613	SEC↗
AMPX Amprius Technologies, Inc.	S Sale	2024-08-21	2024-08-22	8,800	$1.04	$9.2K	386,168	SEC↗
AMPX Amprius Technologies, Inc.	S Sale	2024-05-22	2024-05-24	4,121	$1.36	$5.6K	394,968	SEC↗
AMPX Amprius Technologies, Inc.	S Sale	2024-05-21	2024-05-24	5,272	$1.33	$7.0K	399,089	SEC↗
AMPX Amprius Technologies, Inc.	A Award	2024-03-19	2024-03-19	374,570	—	$0	404,361	SEC↗
AMPX Amprius Technologies, Inc.	S Sale	2023-09-15	2023-09-18	33,630	$3.89	$130.8K	29,791	SEC↗
AMPX Amprius Technologies, Inc.	S Sale	2023-09-14	2023-09-18	46,370	$3.66	$169.7K	63,421	SEC↗
AMPX Amprius Technologies, Inc.	M Exercise deriv	2023-09-09	2023-09-12	80,000	—	$0	435,962	SEC↗
AMPX Amprius Technologies, Inc.	M Exercise	2023-09-09	2023-09-12	80,000	$0.05	$4.0K	109,791	SEC↗
AMPX Amprius Technologies, Inc.	F Tax w/h	2022-12-14	2023-05-03	209	$7.20	$1.5K	29,791	SEC↗
AMPX Amprius Technologies, Inc.	M Exercise deriv	2022-12-14	2022-12-15	30,000	—	$0	515,962	SEC↗
AMPX Amprius Technologies, Inc.	M Exercise	2022-12-14	2022-12-15	30,000	$0.05	$1.5K	30,000	SEC↗
AMPX Amprius Technologies, Inc.	A Award deriv	2022-09-14	2022-09-16	218,385	—	$0	218,385	SEC↗
AMPX Amprius Technologies, Inc.	A Award deriv	2022-09-14	2022-09-16	181,987	—	$0	181,987	SEC↗
AMPX Amprius Technologies, Inc.	A Award deriv	2022-09-14	2022-09-16	545,962	—	$0	545,962	SEC↗
AMPX Amprius Technologies, Inc.	A Award deriv	2022-09-14	2022-09-16	72,795	—	$0	72,795	SEC↗
AMPX Amprius Technologies, Inc.	A Award deriv	2022-09-14	2022-09-16	72,795	—	$0	72,795	SEC↗