Amprius Technologies

AMPX13F as of Jun 30, 2026 · next update ~Nov 14

Limited coverage

Only 1 fund we track owns this stock, so quarterly sentiment and aggregates may be sparse.

Who's buying AMPX

Top funds mostly added to Amprius Technologies in Q2 (Apr⁠–⁠Jun)

Buying:

Funds1InsidersCongress

Top funds
1 of 1 bought more, 0 sold some. Largest: Polen Capital Management, $6.5M (0% of its portfolio).
Insiders
No buys, 27 sales in 12 months.
Congress
No trades disclosed in the last 12 months.

1 fund$6.5M held0.1% avg. weightQ2: 1 bought / 0 sold

13F reports are a snapshot as of Jun 30, 2026; funds may have traded since. Insiders often sell for personal reasons (taxes, diversification, planned sales).

Share price · market data, not from 13F reports

Q2 2026

Insider trades (Form 4)

Last 2 years · 41 filings

Date	Insider	Type	Shares	Price	Value
Aug 21, 2026	Kang Sun Director	Sold	62,101	$10.34	$642K
Aug 21, 2026	Constantin Ionel Stefan CTO	Sold	29,681	$10.34	$307K
Aug 21, 2026	Thomas M Stepien CEO	Sold	31,529	$10.26	$324K
Jun 15, 2026	Donald R Dixon Director	Sold	85,000	$17.17	$1.46M
Jun 9, 2026	Donald R Dixon Director	Sold	40,000	$19.13	$765K
Jun 4, 2026	Thomas M Stepien CEO	Sold	2,000	$20.97	$42K
May 27, 2026	Kang Sun Director	Sold	356	$17.19	$6K
May 27, 2026	Thomas M Stepien CEO	Sold	4,375	$17.19	$75K
May 27, 2026	Constantin Ionel Stefan CTO	Sold	3,208	$17.19	$55K
May 26, 2026	Donald R Dixon Director	Sold	17,895	$17.90	$320K
May 21, 2026	Kang Sun Director	Sold	67,796	$14.79	$1.00M
May 21, 2026	Constantin Ionel Stefan CTO	Sold	28,812	$14.79	$426K
May 21, 2026	Thomas M Stepien CEO	Sold	60,702	$14.79	$898K
Apr 1, 2026	Kang Sun Director	Sold	1,500,000	$15.91	$23.86M
Mar 23, 2026	Kang Sun Director	Sold	217,869	$18.80	$4.10M
Mar 12, 2026	Wen Hsuan Hsieh Director	Sold	413,146	$18.44	$7.62M
Mar 10, 2026	Steven Chu Director	Sold	322,197	$18.20	$5.86M
Feb 23, 2026	Kang Sun Director	Sold	61,251	$10.16	$622K
Feb 23, 2026	Constantin Ionel Stefan CTO	Sold	25,366	$10.16	$258K
Jan 28, 2026	Constantin Ionel Stefan CTO	Sold	39,690	$12.00	$476K
Jan 21, 2026	Constantin Ionel Stefan CTO	Sold	567,707	$12.03	$6.83M
Jan 16, 2026	Kang Sun Director	Sold	993,733	$11.06	$10.99M
Jan 12, 2026	Kang Sun Director	Sold	506,267	$10.10	$5.11M
Dec 11, 2025	Constantin Ionel Stefan CTO	Sold	198,255	$10.51	$2.08M
Nov 21, 2025	Constantin Ionel Stefan CTO	Sold	25,024	$10.08	$252K
Nov 21, 2025	Kang Sun CEO	Sold	68,655	$10.08	$692K
Nov 17, 2025	Kang Sun CEO	Sold	1,000,000	$10.60	$10.60M
Aug 21, 2025	Constantin Ionel Stefan CTO	Sold	19,159	$6.82	$131K
Aug 21, 2025	Sandra Wallach CFO	Sold	28,390	$6.82	$194K
Aug 21, 2025	Kang Sun CEO	Sold	65,654	$6.82	$448K
May 21, 2025	Constantin Ionel Stefan CTO	Sold	20,366	$2.43	$50K
May 21, 2025	Sandra Wallach CFO	Sold	27,595	$2.43	$67K
May 21, 2025	Kang Sun CEO	Sold	69,786	$2.43	$170K
Feb 21, 2025	Kang Sun CEO	Sold	34,353	$3.13	$108K
Feb 21, 2025	Sandra Wallach CFO	Sold	18,142	$3.13	$57K
Feb 21, 2025	Constantin Ionel Stefan CTO	Sold	9,066	$3.13	$28K
Feb 21, 2025	Jonathan Bornstein President	Sold	13,527	$3.13	$42K
Nov 21, 2024	Kang Sun CEO	Sold	33,779	$1.96	$66K
Nov 20, 2024	Jonathan Bornstein President	Sold	166,706	$1.93	$322K
Nov 21, 2024	Sandra Wallach CFO	Sold	17,158	$1.96	$34K
Nov 21, 2024	Constantin Ionel Stefan CTO	Sold	8,575	$1.96	$17K