InsiderClue
Stocks · Technology · Miscellaneous Electrical Machinery, Equipment & Supplies

Amprius Technologies, Inc.

AMPX Clue Score50
United States Fiscal year ends December CIK 0001899287 Results filed 4 Aug 2026
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What the insiders did Net selling

Individual transactions

37
Insider
Date
Role
Action
Shares
Price
Amount
Thomas M Stepien
24 Aug 2026
Chief Executive Officer
Sell
8,000
$10.03
$80.24K
Thomas M Stepien
21 Aug 2026
Chief Executive Officer
Sell
23,529
$10.34
$243.31K
Constantin Ionel Stefan
21 Aug 2026
Chief Technology Officer
Sell
29,681
$10.34
$306.93K
Kang Sun
21 Aug 2026
Director
Sell
62,101
$10.34
$642.19K
Donald R Dixon
15 Jun 2026
Director
Sell indirect
85,000
$17.17
$1.46M
Donald R Dixon
9 Jun 2026
Director
Sell indirect
40,000
$19.13
$765.20K
Thomas M Stepien
4 Jun 2026
Chief Executive Officer
Sell
2,000
$20.97
$41.94K
Constantin Ionel Stefan
27 May 2026
Chief Technology Officer
Sell
3,208
$17.19
$55.16K
Thomas M Stepien
27 May 2026
Chief Executive Officer
Sell
4,375
$17.19
$75.22K
Kang Sun
27 May 2026
Director
Sell
356
$17.19
$6.12K
Donald R Dixon
26 May 2026
Director
Sell indirect
17,895
$17.90
$320.25K
Thomas M Stepien
21 May 2026
Chief Executive Officer
Sell
60,702
$14.79
$897.69K
Constantin Ionel Stefan
21 May 2026
Chief Technology Officer
Sell
28,812
$14.79
$426.08K
Kang Sun
21 May 2026
Director
Sell
67,796
$14.79
$1.00M
Kang Sun
1 Apr 2026
Director
Sold after exercise
249,037
$16.78
$4.18M
Kang Sun
1 Apr 2026
Director
Sold after exercise
1,250,963
$15.73
$19.68M
Kang Sun
23 Mar 2026
Director
Sell indirect
65,046
$19.06
$1.24M
Kang Sun
23 Mar 2026
Director
Sell indirect
152,823
$18.69
$2.86M
Steven Chu
12 Mar 2026
Director
Sold after exercise
5,565
$18.53
$103.15K
Steven Chu
12 Mar 2026
Director
Sold after exercise
50,000
$18.21
$910.74K
Steven Chu
12 Mar 2026
Director
Sold after exercise
100,000
$18.65
$1.86M
Wen Hsuan HSIEH
12 Mar 2026
Director
Sold after exercise
130,646
$18.22
$2.38M
Wen Hsuan HSIEH
12 Mar 2026
Director
Sold after exercise
282,500
$18.55
$5.24M
Steven Chu
10 Mar 2026
Director
Sold after exercise
166,632
$17.92
$2.99M
Constantin Ionel Stefan
23 Feb 2026
Chief Technology Officer
Sell
25,366
$10.16
$257.60K
Kang Sun
23 Feb 2026
Director
Sell
61,251
$10.16
$622.03K
Constantin Ionel Stefan
28 Jan 2026
Chief Technology Officer
Sold after exercise
39,690
$12.00
$476.35K
Constantin Ionel Stefan
23 Jan 2026
Chief Technology Officer
Sold after exercise
1,600
$12.00
$19.20K
Constantin Ionel Stefan
22 Jan 2026
Chief Technology Officer
Sold after exercise
492,827
$12.04
$5.93M
Constantin Ionel Stefan
21 Jan 2026
Chief Technology Officer
Sold after exercise
73,280
$12.00
$879.41K
Kang Sun
20 Jan 2026
Director
Sold after exercise
43,185
$11.03
$476.27K
Kang Sun
16 Jan 2026
Director
Sold after exercise
950,548
$11.07
$10.52M
Kang Sun
12 Jan 2026
Director
Sold after exercise
506,267
$10.10
$5.11M
Constantin Ionel Stefan
11 Dec 2025
Chief Technology Officer
Sold after exercise
198,255
$10.51
$2.08M
Kang Sun
21 Nov 2025
Chief Executive Officer
Sell
68,655
$10.08
$692.13K
Constantin Ionel Stefan
21 Nov 2025
Chief Technology Officer
Sell
25,024
$10.08
$252.27K
Kang Sun
17 Nov 2025
Chief Executive Officer
Sold after exercise
1,000,000
$10.60
$10.60M

What was left out

Form 4 filings counted 35
Amendments (4/A) skipped 2
Filings about a different issuer 0
Unreadable filings 0
Joint filings 0
Sales on a Rule 10b5-1 plan 0
Sales straight out of an exercise 17
Sales at will 20
Transactions with no price 0
Shares from compensation/vesting 6,040,191
History held since 16 Sep 2022