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United States Machinery, Equipment & Components

Amprius Technologies Inc (AMPX)

Track

Over the last 90 days, Amprius Technologies Inc. has seen significant insider selling, with a net value of -$5,091,407. Executives contributed -$1,538,027 to this net sell-off. Notably, Director Donald R. Dixon and CEO Thomas M. Stepien have made substantial sales. The company's stock has experienced a 90-day price decline of 18.9%.
Stock chart
Ticker: AMPX Exchange: NYS
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• Purchase • Sale • Planned purchase • Planned sale Net purchase Net sale Activity signal Earnings
Top insiders
Trades
DIXON DONALD R
1 sale — total 100,000 USD
Sale 15 Jun 2026
Value US$3,183,705.68 | Price 102.74 | Shares 18,312
Sale 9 Jun 2026
Value US$4,069,032.24 | Price 473.71 | Shares 41,549
Proposed sale 8 Jun 2026
Value US$100,000.00 | Price 18.85 | Shares 1,000
Sale 4 Jun 2026
Value US$100,000.00 | Price 20.97 | Shares 1,000
Sale 4 Jun 2026
Value US$100,000.00 | Price 20.97 | Shares 1,000
Proposed sale 4 Jun 2026
Value US$100,000.00 | Price 20.97 | Shares 1,000
Sale 27 May 2026
Value US$6,120.89 | Price 17.19 | Shares 356
Sale 27 May 2026
Value US$75,221.56 | Price 17.19 | Shares 4,375
Proposed sale 27 May 2026
Value US$6,120.89 | Price 17.19 | Shares 356
Proposed sale 27 May 2026
Value US$75,221.56 | Price 17.19 | Shares 4,375
Sale 27 May 2026
Value US$55,156.75 | Price 17.19 | Shares 3,208
Proposed sale 27 May 2026
Value US$55,156.75 | Price 17.19 | Shares 3,208
Sale 26 May 2026
Value US$320,252.50 | Price 17.90 | Shares 17,895
Proposed sale 26 May 2026
Value US$315,846.75 | Price 17.65 | Shares 17,895
Sale 21 May 2026
Value US$1,002,594.37 | Price 14.79 | Shares 67,796
Proposed sale 21 May 2026
Value US$1,002,594.37 | Price 14.79 | Shares 67,796
Sale 21 May 2026
Value US$426,083.38 | Price 14.79 | Shares 28,812
Proposed sale 21 May 2026
Value US$426,083.38 | Price 14.79 | Shares 28,812
Sale 21 May 2026
Value US$897,685.46 | Price 14.79 | Shares 60,702
Proposed sale 21 May 2026
Value US$897,685.46 | Price 14.79 | Shares 60,702
Planned sale 1 Apr 2026
Value US$4,179,563.07 | Price 16.78 | Shares 249,037
Planned sale 1 Apr 2026
Value US$19,681,150.69 | Price 15.73 | Shares 1,250,963
Proposed sale 1 Apr 2026
Value US$25,290,000.00 | Price 16.86 | Shares 1,500,000
Planned sale 23 Mar 2026
Value US$1,239,705.21 | Price 19.06 | Shares 65,046
Planned sale 23 Mar 2026
Value US$2,855,696.42 | Price 18.69 | Shares 152,823
Proposed sale 23 Mar 2026
Value US$3,507,631.40 | Price 18.20 | Shares 192,727
Sale 12 Mar 2026
Value US$2,380,788.19 | Price 18.22 | Shares 130,646
Sale 12 Mar 2026
Value US$5,239,245.00 | Price 18.55 | Shares 282,500
Sale 12 Mar 2026
Value US$103,145.05 | Price 18.53 | Shares 5,565
Sale 12 Mar 2026
Value US$910,740.00 | Price 18.21 | Shares 50,000
Sale 12 Mar 2026
Value US$1,864,670.00 | Price 18.65 | Shares 100,000
Proposed sale 12 Mar 2026
Value US$7,618,412.24 | Price 18.44 | Shares 413,146
Proposed sale 12 Mar 2026
Value US$2,870,174.25 | Price 18.45 | Shares 155,565
Sale 10 Mar 2026
Value US$2,985,428.90 | Price 17.92 | Shares 166,632
Proposed sale 10 Mar 2026
Value US$2,985,428.90 | Price 17.92 | Shares 166,632
Sale 23 Feb 2026
Value US$622,034.53 | Price 10.16 | Shares 61,251
Sale 23 Feb 2026
Value US$257,604.41 | Price 10.16 | Shares 25,366
Proposed sale 23 Feb 2026
Value US$257,719.00 | Price 10.16 | Shares 25,366
Proposed sale 23 Feb 2026
Value US$622,034.53 | Price 10.16 | Shares 61,251
Planned sale 28 Jan 2026
Value US$476,351.44 | Price 12.00 | Shares 39,690
Planned sale 23 Jan 2026
Value US$19,200.00 | Price 12.00 | Shares 1,600
Planned sale 22 Jan 2026
Value US$5,931,912.19 | Price 12.04 | Shares 492,827
Planned sale 21 Jan 2026
Value US$879,411.30 | Price 12.00 | Shares 73,280
Proposed sale 21 Jan 2026
Value US$8,012,319.19 | Price 11.17 | Shares 717,307
Planned sale 20 Jan 2026
Value US$476,274.41 | Price 11.03 | Shares 43,185
Planned sale 16 Jan 2026
Value US$10,518,669.11 | Price 11.07 | Shares 950,548
Proposed sale 16 Jan 2026
Value US$10,341,581.25 | Price 10.15 | Shares 1,018,875
Planned sale 12 Jan 2026
Value US$5,111,474.14 | Price 10.10 | Shares 506,267
Proposed sale 12 Jan 2026
Value US$4,799,411.16 | Price 9.48 | Shares 506,267
Planned sale 11 Dec 2025
Value US$2,083,382.49 | Price 10.51 | Shares 198,255
Proposed sale 11 Dec 2025
Value US$2,188,735.20 | Price 11.04 | Shares 198,255
Proposed sale 21 Nov 2025
Value US$252,274.00 | Price 10.08 | Shares 25,024
Sale 21 Nov 2025
Value US$252,274.45 | Price 10.08 | Shares 25,024
Proposed sale 21 Nov 2025
Value US$692,132.00 | Price 10.08 | Shares 68,655
Sale 21 Nov 2025
Value US$692,131.65 | Price 10.08 | Shares 68,655
Planned sale 17 Nov 2025
Value US$10,595,300.00 | Price 10.60 | Shares 1,000,000
Proposed sale 17 Nov 2025
Value US$11,290,000.00 | Price 11.29 | Shares 1,000,000
Proposed sale 21 Aug 2025
Value US$130,592.00 | Price 6.82 | Shares 19,159
Sale 21 Aug 2025
Value US$130,591.58 | Price 6.82 | Shares 19,159
Proposed sale 21 Aug 2025
Value US$193,512.00 | Price 6.82 | Shares 28,390
Proposed sale 21 Aug 2025
Value US$447,511.00 | Price 6.82 | Shares 65,654
Sale 21 Aug 2025
Value US$193,511.92 | Price 6.82 | Shares 28,390
Sale 21 Aug 2025
Value US$447,510.79 | Price 6.82 | Shares 65,654
Proposed sale 21 May 2025
Value US$49,530.00 | Price 2.43 | Shares 20,366
Proposed sale 21 May 2025
Value US$67,111.00 | Price 2.43 | Shares 27,595
Proposed sale 21 May 2025
Value US$169,720.00 | Price 2.43 | Shares 69,786
Sale 21 May 2025
Value US$67,111.04 | Price 2.43 | Shares 27,595
Sale 21 May 2025
Value US$49,530.11 | Price 2.43 | Shares 20,366
Sale 21 May 2025
Value US$169,719.55 | Price 2.43 | Shares 69,786
Proposed sale 21 Feb 2025
Value US$42,382.80 | Price 3.13 | Shares 13,527
Proposed sale 21 Feb 2025
Value US$28,406.60 | Price 3.13 | Shares 9,066
Proposed sale 21 Feb 2025
Value US$56,842.50 | Price 3.13 | Shares 18,142
Proposed sale 21 Feb 2025
Value US$107,634.80 | Price 3.13 | Shares 34,353
Sale 21 Feb 2025
Value US$107,634.82 | Price 3.13 | Shares 34,353
Sale 21 Feb 2025
Value US$56,842.51 | Price 3.13 | Shares 18,142
Abbreviations B: Buy, S: Sell, PP: Planned purchase, PlS: Planned sale, PrS: Proposed sale, O: Option / Other
Notification date Transaction date B/S Transaction type Insider and/or position Nb. shares
Price
Value 		Number of shares Price Value Details
2026-06-16 2026-06-15 S Sale
DIXON DONALD R
Non-Executive Director
18,312 -40.6%
102.74
US$3,183,706 		18,312 -40.6% 102.74 US$3,183,706
2026-06-11 2026-06-09 S Sale
DIXON DONALD R
Non-Executive Director
41,549 -43.9%
473.71
US$4,069,032 		41,549 -43.9% 473.71 US$4,069,032
2026-06-08 2026-06-08 PrS Proposed sale
DIXON DONALD R

Director

Non-Executive Director
73,453
175.93
US$2,120,414 		73,453 175.93 US$2,120,414
2026-06-05 2026-06-04 S Sale
Stepien Thomas M

Chief Executive Officer

Executive Director
1,000 -0.3%
20.97
US$100,000 		1,000 -0.3% 20.97 US$100,000
2026-06-05 2026-06-04 S Sale
Stepien Thomas M

Chief Executive Officer

Executive Director
1,000 -0.3%
20.97
US$100,000 		1,000 -0.3% 20.97 US$100,000
2026-06-04 2026-06-04 PrS Proposed sale
THOMAS M STEPIEN

Officer; Director

Executive Director
1,000
20.97
US$100,000 		1,000 20.97 US$100,000
2026-05-28 2026-05-27 S Sale
2.0
Sun Kang
Non-Executive Director
356 -0.0%
17.19
US$6,121 		356 -0.0% 17.19 US$6,121
2026-05-28 2026-05-27 S Sale
Stepien Thomas M

Chief Executive Officer

Executive Director
4,375 -0.6%
17.19
US$75,222 		4,375 -0.6% 17.19 US$75,222
2026-05-28 2026-05-27 PrS Proposed sale
2.0
KANG SUN

Director

Non-Executive Director
356
17.19
US$6,121 		356 17.19 US$6,121
2026-05-28 2026-05-27 PrS Proposed sale
Thomas M. Stepien

Officer; Director

Executive Director
4,375
17.19
US$75,222 		4,375 17.19 US$75,222
2026-05-28 2026-05-27 S Sale
2.2
Stefan Constantin Ionel

Chief Technology Officer

Officer
3,208 -0.4%
17.19
US$55,157 		3,208 -0.4% 17.19 US$55,157
2026-05-28 2026-05-27 PrS Proposed sale
2.2
Constantin Ionel Stefan

Officer

Officer
3,208
17.19
US$55,157 		3,208 17.19 US$55,157
2026-05-28 2026-05-26 S Sale
DIXON DONALD R
Non-Executive Director
17,895 -3.6%
17.90
US$320,252 		17,895 -3.6% 17.90 US$320,252
2026-05-26 2026-05-26 PrS Proposed sale
DIXON DONALD R

Director

Non-Executive Director
17,895
17.65
US$315,847 		17,895 17.65 US$315,847
2026-05-26 2026-05-21 S Sale
2.0
Sun Kang
Non-Executive Director
67,796 -5.0%
14.79
US$1,002,594 		67,796 -5.0% 14.79 US$1,002,594
2026-05-26 2026-05-21 PrS Proposed sale
2.0
KANG SUN

Director

Non-Executive Director
67,796
14.79
US$1,002,594 		67,796 14.79 US$1,002,594
2026-05-26 2026-05-21 S Sale
2.2
Stefan Constantin Ionel

Chief Technology Officer

Officer
28,812 -3.5%
14.79
US$426,083 		28,812 -3.5% 14.79 US$426,083
2026-05-26 2026-05-21 PrS Proposed sale
2.2
Stefan Constantin Ionel

Officer

Officer
28,812
14.79
US$426,083 		28,812 14.79 US$426,083
2026-05-26 2026-05-21 S Sale
Stepien Thomas M

Chief Executive Officer

Executive Director
60,702 -8.0%
14.79
US$897,685 		60,702 -8.0% 14.79 US$897,685
2026-05-26 2026-05-21 PrS Proposed sale
Thomas M. Stepien

Officer; Director

Executive Director
60,702
14.79
US$897,685 		60,702 14.79 US$897,685
2026-04-02 2026-04-01 PlS Planned sale
2.0
Sun Kang
Non-Executive Director
249,037 -15.6%
16.78
US$4,179,563 		249,037 -15.6% 16.78 US$4,179,563
2026-04-02 2026-04-01 PlS Planned sale
2.0
Sun Kang
Non-Executive Director
1,250,963 -44.0%
15.73
US$19,681,151 		1,250,963 -44.0% 15.73 US$19,681,151
2026-04-01 2026-04-01 PrS Proposed sale
2.0
KANG SUN

Director; Officer

Executive Director
1,500,000
16.86
US$25,290,000 		1,500,000 16.86 US$25,290,000
2026-03-24 2026-03-23 PlS Planned sale
2.0
Sun Kang
Non-Executive Director
65,046 -53.6%
19.06
US$1,239,705 		65,046 -53.6% 19.06 US$1,239,705
2026-03-24 2026-03-23 PlS Planned sale
2.0
Sun Kang
Non-Executive Director
152,823 -55.7%
18.69
US$2,855,696 		152,823 -55.7% 18.69 US$2,855,696
2026-03-23 2026-03-23 PrS Proposed sale
2.0
KANG SUN

Director

Non-Executive Director
192,727
18.20
US$3,507,631 		192,727 18.20 US$3,507,631
2026-03-13 2026-03-12 S Sale
3.8
HSIEH Wen Hsuan
Non-Executive Director
130,646 -74.6%
18.22
US$2,380,788 		130,646 -74.6% 18.22 US$2,380,788
2026-03-13 2026-03-12 S Sale
3.8
HSIEH Wen Hsuan
Non-Executive Director
282,500 -61.7%
18.55
US$5,239,245 		282,500 -61.7% 18.55 US$5,239,245
2026-03-12 2026-03-12 S Sale
Chu Steven
Non-Executive Director
5,565 -4.2%
18.53
US$103,145 		5,565 -4.2% 18.53 US$103,145
2026-03-12 2026-03-12 S Sale
Chu Steven
Non-Executive Director
50,000 -27.3%
18.21
US$910,740 		50,000 -27.3% 18.21 US$910,740
2026-03-12 2026-03-12 S Sale
Chu Steven
Non-Executive Director
100,000 -35.3%
18.65
US$1,864,670 		100,000 -35.3% 18.65 US$1,864,670
2026-03-12 2026-03-12 PrS Proposed sale
3.8
WEN HSUAN HSIEH

Officer; Director

Executive Director
413,146
18.44
US$7,618,412 		413,146 18.44 US$7,618,412
2026-03-12 2026-03-12 PrS Proposed sale
STEVEN CHU

Board Seat
155,565
18.45
US$2,870,174 		155,565 18.45 US$2,870,174
2026-03-12 2026-03-10 S Sale
Chu Steven
Non-Executive Director
166,632 -56.7%
17.92
US$2,985,429 		166,632 -56.7% 17.92 US$2,985,429
2026-03-10 2026-03-10 PrS Proposed sale
STEVEN CHU

Board Seat
166,632
17.92
US$2,985,429 		166,632 17.92 US$2,985,429
2026-02-24 2026-02-23 S Sale
2.0
Sun Kang
Non-Executive Director
61,251 -4.4%
10.16
US$622,035 		61,251 -4.4% 10.16 US$622,035
2026-02-24 2026-02-23 S Sale
2.2
Stefan Constantin Ionel

Chief Technology Officer

Officer
25,366 -3.4%
10.16
US$257,604 		25,366 -3.4% 10.16 US$257,604
2026-02-24 2026-02-23 PrS Proposed sale
2.0
KANG SUN

Director

Non-Executive Director
61,251
10.16
US$622,035 		61,251 10.16 US$622,035
2026-02-24 2026-02-23 PrS Proposed sale
2.2
Stefan Constantin Ionel

Officer

Officer
25,366
10.16
US$257,719 		25,366 10.16 US$257,719
2026-01-30 2026-01-28 PlS Planned sale
2.2
Stefan Constantin Ionel

Chief Technology Officer

Officer
39,690 -5.0%
12.00
US$476,351 		39,690 -5.0% 12.00 US$476,351
2026-01-23 2026-01-23 PlS Planned sale
2.2
Stefan Constantin Ionel

Chief Technology Officer

Officer
1,600 -0.2%
12.00
US$19,200 		1,600 -0.2% 12.00 US$19,200
2026-01-23 2026-01-22 PlS Planned sale
2.2
Stefan Constantin Ionel

Chief Technology Officer

Officer
492,827 -39.7%
12.04
US$5,931,912 		492,827 -39.7% 12.04 US$5,931,912
2026-01-23 2026-01-21 PlS Planned sale
2.2
Stefan Constantin Ionel

Chief Technology Officer

Officer
73,280 -8.9%
12.00
US$879,411 		73,280 -8.9% 12.00 US$879,411
2026-01-21 2026-01-21 PrS Proposed sale
2.2
Stefan Constantin Ionel

Officer

Officer
717,307
11.17
US$8,012,319 		717,307 11.17 US$8,012,319
2026-01-20 2026-01-20 PlS Planned sale
2.0
Sun Kang
Non-Executive Director
43,185 -3.0%
11.03
US$476,274 		43,185 -3.0% 11.03 US$476,274
2026-01-20 2026-01-16 PlS Planned sale
2.0
Sun Kang
Non-Executive Director
950,548 -40.4%
11.07
US$10,518,669 		950,548 -40.4% 11.07 US$10,518,669
2026-01-16 2026-01-16 PrS Proposed sale
2.0
KANG SUN

Director; Officer

Executive Director
1,018,875
10.15
US$10,341,581 		1,018,875 10.15 US$10,341,581
2026-01-14 2026-01-12 PlS Planned sale
2.0
Sun Kang
Non-Executive Director
506,267 -26.5%
10.10
US$5,111,474 		506,267 -26.5% 10.10 US$5,111,474
2026-01-12 2026-01-12 PrS Proposed sale
2.0
KANG SUN

Director; Officer

Executive Director
506,267
9.48
US$4,799,411 		506,267 9.48 US$4,799,411
2025-12-15 2025-12-11 PlS Planned sale
2.2
Stefan Constantin Ionel

Chief Technology Officer

Officer
198,255 -20.9%
10.51
US$2,083,382 		198,255 -20.9% 10.51 US$2,083,382
2025-12-11 2025-12-11 PrS Proposed sale
2.2
Stefan Constantin Ionel

Officer

Officer
198,255
11.04
US$2,188,735 		198,255 11.04 US$2,188,735
2025-11-25 2025-11-21 PrS Proposed sale
2.2
Stefan Constantin Ionel

Officer

Officer
25,024
10.08
US$252,274 		25,024 10.08 US$252,274
2025-11-25 2025-11-21 PrS Proposed sale
2.0
Kang Sun

Officer; Director

Executive Director
68,655
10.08
US$692,132 		68,655 10.08 US$692,132
2025-11-25 2025-11-21 S Sale
2.0
Sun Kang

Chief Executive Officer

Executive Director
68,655 -4.7%
10.08
US$692,132 		68,655 -4.7% 10.08 US$692,132
2025-11-25 2025-11-21 S Sale
2.2
Stefan Constantin Ionel

Chief Technology Officer

Officer
25,024 -3.0%
10.08
US$252,274 		25,024 -3.0% 10.08 US$252,274
2025-11-19 2025-11-17 PlS Planned sale
2.0
Sun Kang

Chief Executive Officer

Executive Director
1,000,000 -40.4%
10.60
US$10,595,300 		1,000,000 -40.4% 10.60 US$10,595,300
2025-11-17 2025-11-17 PrS Proposed sale
2.0
KANG SUN

Director; Officer

Executive Director
1,000,000
11.29
US$11,290,000 		1,000,000 11.29 US$11,290,000
2025-08-25 2025-08-21 PrS Proposed sale
2.2
Stefan Constantin Ionel

OFFICER

Officer
19,159
6.82
US$130,592 		19,159 6.82 US$130,592
2025-08-25 2025-08-21 PrS Proposed sale
1.9
Sandra Wallach

Officer

Officer
28,390
6.82
US$193,512 		28,390 6.82 US$193,512
2025-08-25 2025-08-21 PrS Proposed sale
2.0
Kang Sun

Officer; Director

Executive Director
65,654
6.82
US$447,511 		65,654 6.82 US$447,511
2025-08-25 2025-08-21 S Sale
2.2
Stefan Constantin Ionel

Chief Technology Officer

Officer
19,159 -2.2%
6.82
US$130,592 		19,159 -2.2% 6.82 US$130,592
2025-08-25 2025-08-21 S Sale
1.9
Wallach Sandra

Chief Financial Officer

Officer
28,390 -2.7%
6.82
US$193,512 		28,390 -2.7% 6.82 US$193,512
2025-08-25 2025-08-21 S Sale
2.0
Sun Kang

Chief Executive Officer

Executive Director
65,654 -4.3%
6.82
US$447,511 		65,654 -4.3% 6.82 US$447,511
2025-05-23 2025-05-21 PrS Proposed sale
2.2
Constantin Ionel Stefan

Officer

Officer
20,366
2.43
US$49,530 		20,366 2.43 US$49,530
2025-05-23 2025-05-21 PrS Proposed sale
1.9
Sandra Wallach

Officer

Officer
27,595
2.43
US$67,111 		27,595 2.43 US$67,111
2025-05-23 2025-05-21 PrS Proposed sale
2.0
Kang Sun

Officer; Director

Executive Director
69,786
2.43
US$169,720 		69,786 2.43 US$169,720
2025-05-23 2025-05-21 S Sale
1.9
Wallach Sandra

Chief Financial Officer

Officer
27,595 -2.6%
2.43
US$67,111 		27,595 -2.6% 2.43 US$67,111
2025-05-23 2025-05-21 S Sale
2.2
Stefan Constantin Ionel

Chief Technology Officer

Officer
20,366 -2.3%
2.43
US$49,530 		20,366 -2.3% 2.43 US$49,530
2025-05-23 2025-05-21 S Sale
2.0
Sun Kang

Chief Executive Officer

Executive Director
69,786 -3.7%
2.43
US$169,720 		69,786 -3.7% 2.43 US$169,720
2025-02-24 2025-02-21 PrS Proposed sale
2.3
Jonathan Bornstein

Officer

Officer
13,527
3.13
US$42,383 		13,527 3.13 US$42,383
2025-02-24 2025-02-21 PrS Proposed sale
2.2
Constantin Ionel Stefan

Officer

Officer
9,066
3.13
US$28,407 		9,066 3.13 US$28,407
2025-02-24 2025-02-21 PrS Proposed sale
1.9
Sandra Wallach

Officer

Officer
18,142
3.13
US$56,842 		18,142 3.13 US$56,842
2025-02-24 2025-02-21 PrS Proposed sale
2.0
Kang Sun

Director; Officer

Executive Director
34,353
3.13
US$107,635 		34,353 3.13 US$107,635
2025-02-24 2025-02-21 S Sale
2.0
Sun Kang

Chief Executive Officer

Executive Director
34,353 -2.6%
3.13
US$107,635 		34,353 -2.6% 3.13 US$107,635
2025-02-24 2025-02-21 S Sale
1.9
Wallach Sandra

Chief Financial Officer

Officer
18,142 -2.6%
3.13
US$56,843 		18,142 -2.6% 3.13 US$56,843
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