AMPXAmprius Technologies, Inc.
- Market cap
- $1.19B
- as of 2026-10-23
- Latest close
- $8.18
- as of 2026-10-23
- Sector
- Industrials
- as of 2026-10-24
- Industry
- Electrical Equipment & Parts
- as of 2026-10-24
Cluster
No cluster in the last 90 days under the default rule (14d · ≥2 insiders · all roles).
Form 4 historysince 2023-10-12
Dashed line = amended filing (Form 4/A)
| Insider | Traded | Filed | Type | Shares | Price | Value | Owned after | 10b5-1 plan | Filing |
|---|---|---|---|---|---|---|---|---|---|
| Stepien Thomas MChief Executive Officer | Aug 25 | Aug 25 | G | 5,000 | $0.00 | $0 | 589,096 | No | Form 4 |
| Stepien Thomas MChief Executive Officer | Aug 25 | Aug 25 | G | 5,000 | $0.00 | $0 | 584,096 | No | Form 4 |
| Stepien Thomas MChief Executive Officer | Aug 25 | Aug 25 | G | 5,000 | $0.00 | $0 | 579,096 | No | Form 4 |
| Stepien Thomas MChief Executive Officer | Aug 25 | Aug 25 | G | 346 | $0.00 | $0 | 578,750 | No | Form 4 |
| Stepien Thomas MChief Executive Officer | Aug 25 | Aug 25 | A | 346 | $0.00 | $0 | 37,260 | No | Form 4 |
| Stepien Thomas MChief Executive Officer | Aug 24 | Aug 25 | S | 8,000 | $10.03 | Sale −$80,240 | 594,096 | No | Form 4 |
| Sun Kang | Aug 21 | Aug 25 | S | 62,101 | $10.34 | Sale −$642,124 | 1,218,397 | No | Form 4 |
| Stefan Constantin IonelChief Technology Officer | Aug 21 | Aug 25 | S | 29,681 | $10.34 | Sale −$306,902 | 771,629 | No | Form 4 |
| Stepien Thomas MChief Executive Officer | Aug 21 | Aug 25 | S | 23,529 | $10.34 | Sale −$243,290 | 602,096 | No | Form 4 |
| Dixon Donald R | Jun 15 | Jun 16 | S | 85,000 | $17.17 | Sale −$1,459,450 | 359,380 | No | Form 4 |
| Dixon Donald R | Jun 12 | Jun 16 | A | 10,423 | $0.00 | $0 | 280,079 | No | Form 4 |
| Bayless Kathleen A | Jun 12 | Jun 16 | A | 10,423 | $0.00 | $0 | 216,120 | No | Form 4 |
| Chu Steven | Jun 12 | Jun 16 | A | 10,423 | $0.00 | $0 | 137,762 | No | Form 4 |
| Satterthwaite Livingston | Jun 12 | Jun 16 | A | 10,423 | $0.00 | $0 | 346,506 | No | Form 4 |
| Dixon Donald R | Jun 9 | Jun 11 | S | 40,000 | $19.13 | Sale −$765,200 | 444,380 | No | Form 4 |
| Stepien Thomas MChief Executive Officer | Jun 4 | Jun 5 | G | 30,384 | $0.00 | $0 | 664,539 | No | Form 4 |
| Stepien Thomas MChief Executive Officer | Jun 4 | Jun 5 | G | 36,914 | $0.00 | $0 | 627,625 | No | Form 4 |
| Stepien Thomas MChief Executive Officer | Jun 4 | Jun 5 | G | 36,914 | $0.00 | $0 | 36,914 | No | Form 4 |
| Stepien Thomas MChief Executive Officer | Jun 4 | Jun 5 | S | 2,000 | $20.97 | Sale −$41,940 | 625,625 | No | Form 4 |
| Sun Kang | May 27 | May 28 | S | 356 | $17.19 | Sale −$6,120 | 1,280,498 | No | Form 4 |
| Stefan Constantin IonelChief Technology Officer | May 27 | May 28 | S | 3,208 | $17.19 | Sale −$55,146 | 801,310 | No | Form 4 |
| Stepien Thomas MChief Executive Officer | May 27 | May 28 | S | 4,375 | $17.19 | Sale −$75,206 | 694,923 | No | Form 4 |
| Dixon Donald R | May 26 | May 28 | S | 17,895 | $17.90 | Sale −$320,321 | 484,380 | No | Form 4 |
| Sun Kang | May 21 | May 26 | S | 67,796 | $14.79 | Sale −$1,002,703 | 1,280,854 | No | Form 4 |
| Stefan Constantin IonelChief Technology Officer | May 21 | May 26 | S | 28,812 | $14.79 | Sale −$426,129 | 804,518 | No | Form 4 |
| Stepien Thomas MChief Executive Officer | May 21 | May 26 | S | 60,702 | $14.79 | Sale −$897,783 | 699,298 | No | Form 4 |
| Sun Kang | May 5 | May 7 | A | 6,250 | $0.00 | $0 | 1,348,650 | No | Form 4 |
| Stepien Thomas MChief Executive Officer | Dec 19, 2025 | May 74/A | A | 200,000 | $0.00 | $0 | 760,000 | No | Form 4/A |
| Sun Kang | Apr 1 | Apr 2 | M | 1,312,505 | $1.78 | $2,336,259 | 2,654,905 | No | Form 4 |
| Sun Kang | Apr 1 | Apr 2 | M | 187,495 | $3.68 | $689,982 | 2,842,400 | No | Form 4 |
| Sun Kang | Apr 1 | Apr 2 | S | 1,250,963 | $15.73 | Sale −$19,677,648 | 1,591,437 | No | Form 4 |
| Sun Kang | Apr 1 | Apr 2 | S | 249,037 | $16.78 | Sale −$4,178,841 | 1,342,400 | No | Form 4 |
| Sun Kang | Apr 1 | Apr 2 | M · derivative | 1,312,505 | $1.78 | $2,336,259 | not reported | No | Form 4 |
| Sun Kang | Apr 1 | Apr 2 | M · derivative | 187,495 | $3.68 | $689,982 | 1,787,007 | No | Form 4 |
| Sun Kang | Mar 23 | Mar 24 | S | 152,823 | $18.69 | Sale −$2,856,262 | 121,452 | No | Form 4 |
| Sun Kang | Mar 23 | Mar 24 | S | 65,046 | $19.06 | Sale −$1,239,777 | 56,406 | No | Form 4 |
| HSIEH Wen Hsuan | Mar 12 | Mar 13 | M | 270,251 | $2.61 | $705,355 | 457,590 | No | Form 4 |
| HSIEH Wen Hsuan | Mar 12 | Mar 13 | S | 282,500 | $18.55 | Sale −$5,240,375 | 175,090 | No | Form 4 |
| HSIEH Wen Hsuan | Mar 12 | Mar 13 | S | 130,646 | $18.22 | Sale −$2,380,370 | 44,444 | No | Form 4 |
| HSIEH Wen Hsuan | Mar 12 | Mar 13 | M · derivative | 270,251 | $2.61 | $705,355 | not reported | No | Form 4 |
| Rodriguez Ricardo C.Chief Financial Officer | Mar 4 | Mar 134/A | A | 150,000 | $0.00 | $0 | 350,000 | No | Form 4/A |
| Chu Steven | Mar 12 | Mar 12 | M | 86,143 | $2.61 | $224,833 | 213,482 | No | Form 4 |
| Chu Steven | Mar 12 | Mar 12 | M | 69,422 | $0.62 | $43,042 | 282,904 | No | Form 4 |
| Chu Steven | Mar 12 | Mar 12 | S | 100,000 | $18.65 | Sale −$1,865,000 | 182,904 | No | Form 4 |
| Chu Steven | Mar 12 | Mar 12 | S | 50,000 | $18.21 | Sale −$910,500 | 132,904 | No | Form 4 |
| Chu Steven | Mar 12 | Mar 12 | S | 5,565 | $18.53 | Sale −$103,119 | 127,339 | No | Form 4 |
| Chu Steven | Mar 12 | Mar 12 | M · derivative | 86,143 | $2.61 | $224,833 | 184,108 | No | Form 4 |
| Chu Steven | Mar 12 | Mar 12 | M · derivative | 69,422 | $0.62 | $43,042 | not reported | No | Form 4 |
| Chu Steven | Mar 10 | Mar 12 | M | 104,132 | $0.62 | $64,562 | 293,971 | No | Form 4 |
| Chu Steven | Mar 10 | Mar 12 | S | 166,632 | $17.92 | Sale −$2,986,045 | 127,339 | No | Form 4 |
| Chu Steven | Mar 10 | Mar 12 | M · derivative | 104,132 | $0.62 | $64,562 | 69,422 | No | Form 4 |
| Stefan Constantin IonelChief Technology Officer | Mar 4 | Mar 6 | A | 110,000 | $0.00 | $0 | 833,330 | No | Form 4 |
| Stepien Thomas MChief Executive Officer | Mar 4 | Mar 6 | A | 150,000 | $0.00 | $0 | 760,000 | No | Form 4 |
| Sun Kang | Feb 23 | Feb 24 | S | 61,251 | $10.16 | Sale −$622,310 | 1,342,400 | No | Form 4 |
| Stefan Constantin IonelChief Technology Officer | Feb 23 | Feb 24 | S | 25,366 | $10.16 | Sale −$257,719 | 723,330 | No | Form 4 |
| Stefan Constantin IonelChief Technology Officer | Jan 28 | Jan 30 | M | 90 | $0.62 | $56 | 748,786 | No | Form 4 |
| Stefan Constantin IonelChief Technology Officer | Jan 28 | Jan 30 | M | 39,600 | $0.05 | $1,980 | 788,386 | No | Form 4 |
| Stefan Constantin IonelChief Technology Officer | Jan 28 | Jan 30 | S | 39,690 | $12.00 | Sale −$476,280 | 748,696 | No | Form 4 |
| Stefan Constantin IonelChief Technology Officer | Jan 28 | Jan 30 | M · derivative | 90 | $0.62 | $56 | not reported | No | Form 4 |
| Stefan Constantin IonelChief Technology Officer | Jan 28 | Jan 30 | M · derivative | 39,600 | $0.05 | $1,980 | not reported | No | Form 4 |
| Stefan Constantin IonelChief Technology Officer | Jan 23 | Jan 23 | M | 1,600 | $0.05 | $80 | 750,296 | No | Form 4 |
| Stefan Constantin IonelChief Technology Officer | Jan 23 | Jan 23 | S | 1,600 | $12.00 | Sale −$19,200 | 748,696 | No | Form 4 |
| Stefan Constantin IonelChief Technology Officer | Jan 23 | Jan 23 | M · derivative | 1,600 | $0.05 | $80 | 39,600 | No | Form 4 |
| Stefan Constantin IonelChief Technology Officer | Jan 22 | Jan 23 | M | 253,928 | $0.05 | $12,696 | 1,002,624 | No | Form 4 |
| Stefan Constantin IonelChief Technology Officer | Jan 22 | Jan 23 | M | 72,795 | $0.45 | $32,758 | 1,075,419 | No | Form 4 |
| Stefan Constantin IonelChief Technology Officer | Jan 22 | Jan 23 | M | 166,104 | $0.05 | $8,305 | 1,241,523 | No | Form 4 |
| Stefan Constantin IonelChief Technology Officer | Jan 22 | Jan 23 | S | 492,827 | $12.04 | Sale −$5,933,637 | 748,696 | No | Form 4 |
| Stefan Constantin IonelChief Technology Officer | Jan 22 | Jan 23 | M · derivative | 253,928 | $0.05 | $12,696 | 41,200 | No | Form 4 |
| Stefan Constantin IonelChief Technology Officer | Jan 22 | Jan 23 | M · derivative | 72,795 | $0.45 | $32,758 | not reported | No | Form 4 |
| Stefan Constantin IonelChief Technology Officer | Jan 22 | Jan 23 | M · derivative | 166,104 | $0.05 | $8,305 | not reported | No | Form 4 |
| Stefan Constantin IonelChief Technology Officer | Jan 21 | Jan 23 | M | 41,563 | $0.62 | $25,769 | 790,259 | No | Form 4 |
| Stefan Constantin IonelChief Technology Officer | Jan 21 | Jan 23 | M | 15,834 | $0.05 | $792 | 806,093 | No | Form 4 |
| Stefan Constantin IonelChief Technology Officer | Jan 21 | Jan 23 | M | 15,883 | $0.05 | $794 | 821,976 | No | Form 4 |
| Stefan Constantin IonelChief Technology Officer | Jan 21 | Jan 23 | S | 73,280 | $12.00 | Sale −$879,360 | 748,696 | No | Form 4 |
| Stefan Constantin IonelChief Technology Officer | Jan 21 | Jan 23 | M · derivative | 41,563 | $0.62 | $25,769 | 90 | No | Form 4 |
| Stefan Constantin IonelChief Technology Officer | Jan 21 | Jan 23 | M · derivative | 15,834 | $0.05 | $792 | 295,128 | No | Form 4 |
| Stefan Constantin IonelChief Technology Officer | Jan 21 | Jan 23 | M · derivative | 15,883 | $0.05 | $794 | 166,104 | No | Form 4 |
| Sun Kang | Jan 20 | Jan 20 | M | 43,185 | $1.78 | $76,869 | 1,446,836 | No | Form 4 |
| Sun Kang | Jan 20 | Jan 20 | S | 43,185 | $11.03 | Sale −$476,331 | 1,403,651 | No | Form 4 |
| Sun Kang | Jan 20 | Jan 20 | M · derivative | 43,185 | $1.78 | $76,869 | 1,312,505 | No | Form 4 |
| Sun Kang | Jan 16 | Jan 20 | M | 850,338 | $2.50 | $2,125,845 | 2,253,989 | No | Form 4 |
| Sun Kang | Jan 16 | Jan 20 | M | 100,210 | $1.78 | $178,374 | 2,354,199 | No | Form 4 |
| Sun Kang | Jan 16 | Jan 20 | S | 950,548 | $11.07 | Sale −$10,522,566 | 1,403,651 | No | Form 4 |
| Sun Kang | Jan 16 | Jan 20 | M · derivative | 850,338 | $2.50 | $2,125,845 | not reported | No | Form 4 |
| Sun Kang | Jan 16 | Jan 20 | M · derivative | 100,210 | $1.78 | $178,374 | 1,355,690 | No | Form 4 |
| Sun Kang | Jan 12 | Jan 14 | M | 180,802 | $0.62 | $112,097 | 1,584,453 | No | Form 4 |
| Sun Kang | Jan 12 | Jan 14 | M | 208,264 | $2.44 | $508,164 | 1,792,717 | No | Form 4 |
| Sun Kang | Jan 12 | Jan 14 | M | 117,201 | $2.50 | $293,003 | 1,909,918 | No | Form 4 |
| Sun Kang | Jan 12 | Jan 14 | S | 506,267 | $10.10 | Sale −$5,113,297 | 1,403,651 | No | Form 4 |
| Sun Kang | Jan 12 | Jan 14 | M · derivative | 180,802 | $0.62 | $112,097 | not reported | No | Form 4 |
| Sun Kang | Jan 12 | Jan 14 | M · derivative | 208,264 | $2.44 | $508,164 | not reported | No | Form 4 |
| Sun Kang | Jan 12 | Jan 14 | M · derivative | 117,201 | $2.50 | $293,003 | 850,338 | No | Form 4 |
| Stefan Constantin IonelChief Technology Officer | Dec 11, 2025 | Dec 15, 2025 | M | 125,000 | $0.05 | $6,250 | 946,951 | No | Form 4 |
| Stefan Constantin IonelChief Technology Officer | Dec 11, 2025 | Dec 15, 2025 | S | 198,255 | $10.51 | Sale −$2,083,660 | 748,696 | No | Form 4 |
| Stefan Constantin IonelChief Technology Officer | Dec 11, 2025 | Dec 15, 2025 | M · derivative | 125,000 | $0.05 | $6,250 | 310,962 | No | Form 4 |
| Sun KangChief Executive Officer | Nov 21, 2025 | Nov 25, 2025 | S | 68,655 | $10.08 | Sale −$692,042 | 1,403,651 | No | Form 4 |
| Stefan Constantin IonelChief Technology Officer | Nov 21, 2025 | Nov 25, 2025 | S | 25,024 | $10.08 | Sale −$252,242 | 821,951 | No | Form 4 |
| Sun KangChief Executive Officer | Nov 17, 2025 | Nov 19, 2025 | M | 202,934 | $0.98 | $198,875 | 1,675,240 | No | Form 4 |
| Sun KangChief Executive Officer | Nov 17, 2025 | Nov 19, 2025 | M | 727,950 | $0.05 | $36,398 | 2,403,190 | No | Form 4 |
| Sun KangChief Executive Officer | Nov 17, 2025 | Nov 19, 2025 | M | 27,463 | $0.62 | $17,027 | 2,430,653 | No | Form 4 |
| Sun KangChief Executive Officer | Nov 17, 2025 | Nov 19, 2025 | M | 41,653 | $0.62 | $25,825 | 2,472,306 | No | Form 4 |
| Sun KangChief Executive Officer | Nov 17, 2025 | Nov 19, 2025 | S | 1,000,000 | $10.60 | Sale −$10,600,000 | 1,472,306 | No | Form 4 |
| Sun KangChief Executive Officer | Nov 17, 2025 | Nov 19, 2025 | M · derivative | 202,934 | $0.98 | $198,875 | not reported | No | Form 4 |
| Sun KangChief Executive Officer | Nov 17, 2025 | Nov 19, 2025 | M · derivative | 727,950 | $0.05 | $36,398 | not reported | No | Form 4 |
| Sun KangChief Executive Officer | Nov 17, 2025 | Nov 19, 2025 | M · derivative | 27,463 | $0.62 | $17,027 | 180,802 | No | Form 4 |
| Sun KangChief Executive Officer | Nov 17, 2025 | Nov 19, 2025 | M · derivative | 41,653 | $0.62 | $25,825 | not reported | No | Form 4 |
| Rodriguez Ricardo C.Chief Financial Officer | Oct 6, 2025 | Oct 8, 2025 | A | 200,000 | $0.00 | $0 | 200,000 | No | Form 4 |
| Sun KangChief Executive Officer | Aug 21, 2025 | Aug 25, 2025 | S | 65,654 | $6.82 | Sale −$447,760 | 1,472,306 | No | Form 4 |
| Wallach SandraChief Financial Officer | Aug 21, 2025 | Aug 25, 2025 | S | 28,390 | $6.82 | Sale −$193,620 | 1,005,275 | No | Form 4 |
| Stefan Constantin IonelChief Technology Officer | Aug 21, 2025 | Aug 25, 2025 | S | 19,159 | $6.82 | Sale −$130,664 | 846,975 | No | Form 4 |
| Chu Steven | Jun 13, 2025 | Jun 17, 2025 | A | 44,444 | $0.00 | $0 | 189,839 | No | Form 4 |
| Bayless Kathleen A | Jun 13, 2025 | Jun 17, 2025 | A | 44,444 | $0.00 | $0 | 205,697 | No | Form 4 |
| Satterthwaite Livingston | Jun 13, 2025 | Jun 17, 2025 | A | 44,444 | $0.00 | $0 | 336,083 | No | Form 4 |
| Dixon Donald R | Jun 13, 2025 | Jun 17, 2025 | A | 44,444 | $0.00 | $0 | 394,656 | No | Form 4 |
| HSIEH Wen Hsuan | Jun 13, 2025 | Jun 17, 2025 | A | 44,444 | $0.00 | $0 | 187,339 | No | Form 4 |
| Sun KangChief Executive Officer | May 21, 2025 | May 23, 2025 | S | 69,786 | $2.43 | Sale −$169,580 | 1,812,235 | No | Form 4 |
| Wallach SandraChief Financial Officer | May 21, 2025 | May 23, 2025 | S | 27,595 | $2.43 | Sale −$67,056 | 1,033,665 | No | Form 4 |
| Stefan Constantin IonelChief Technology Officer | May 21, 2025 | May 23, 2025 | S | 20,366 | $2.43 | Sale −$49,489 | 866,134 | No | Form 4 |
| Stepien Thomas MPresident | May 1, 2025 | May 6, 2025 | A | 400,000 | $0.00 | $0 | 400,000 | No | Form 4 |
| Sun KangChief Executive Officer | Mar 19, 2025 | Mar 21, 2025 | A | 599,400 | $0.00 | $0 | 1,882,021 | No | Form 4 |
| Wallach SandraChief Financial Officer | Mar 19, 2025 | Mar 21, 2025 | A | 383,260 | $0.00 | $0 | 1,061,260 | No | Form 4 |
| Stefan Constantin IonelChief Technology Officer | Mar 19, 2025 | Mar 21, 2025 | A | 461,540 | $0.00 | $0 | 886,500 | No | Form 4 |
| Stefan Constantin IonelChief Technology Officer | Mar 14, 2025 | Mar 18, 2025 | M | 3,471 | $0.98 | $3,402 | 424,960 | No | Form 4 |
| Stefan Constantin IonelChief Technology Officer | Mar 14, 2025 | Mar 18, 2025 | M · derivative | 3,471 | $0.98 | $3,402 | not reported | No | Form 4 |
| Bornstein JonathanPresident of Amprius Lab | Mar 10, 2025 | Mar 12, 2025 | M | 3,471 | $0.98 | $3,402 | 422,668 | No | Form 4 |
| Bornstein JonathanPresident of Amprius Lab | Mar 10, 2025 | Mar 12, 2025 | M · derivative | 3,471 | $0.98 | $3,402 | not reported | No | Form 4 |
| Sun KangChief Executive Officer | Feb 21, 2025 | Feb 24, 2025 | S | 34,353 | $3.13 | Sale −$107,525 | 1,282,621 | No | Form 4 |
| Wallach SandraChief Financial Officer | Feb 21, 2025 | Feb 24, 2025 | S | 18,142 | $3.13 | Sale −$56,784 | 678,000 | No | Form 4 |
| Stefan Constantin IonelChief Technology Officer | Feb 21, 2025 | Feb 24, 2025 | S | 9,066 | $3.13 | Sale −$28,377 | 421,489 | No | Form 4 |
| Bornstein JonathanPresident of Amprius Lab | Feb 21, 2025 | Feb 24, 2025 | S | 13,527 | $3.13 | Sale −$42,340 | 419,197 | No | Form 4 |
| Sun KangChief Executive Officer | Nov 21, 2024 | Nov 22, 2024 | S | 33,779 | $1.96 | Sale −$66,207 | 1,316,974 | No | Form 4 |
| Wallach SandraChief Financial Officer | Nov 21, 2024 | Nov 22, 2024 | S | 17,158 | $1.96 | Sale −$33,630 | 696,142 | No | Form 4 |
| Stefan Constantin IonelChief Technology Officer | Nov 21, 2024 | Nov 22, 2024 | S | 8,575 | $1.96 | Sale −$16,807 | 430,555 | No | Form 4 |
| Bornstein JonathanPresident of Amprius Lab | Nov 21, 2024 | Nov 22, 2024 | S | 15,000 | $1.96 | Sale −$29,400 | 1,040,950 | No | Form 4 |
| Bornstein JonathanPresident of Amprius Lab | Nov 21, 2024 | Nov 22, 2024 | S | 18,170 | $1.96 | Sale −$35,613 | 454,131 | No | Form 4 |
| Bornstein JonathanPresident of Amprius Lab | Nov 20, 2024 | Nov 22, 2024 | S | 133,536 | $1.92 | Sale −$256,389 | 1,039,187 | No | Form 4 |
| Amprius, Inc. | Oct 23, 2024 | Oct 25, 2024 | J | 5,500,000 | not reported | not reported | 59,695,997 | No | Form 4 |
| Amprius, Inc. | Oct 23, 2024 | Oct 25, 2024 | J | 57,195,926 | not reported | not reported | 2,500,071 | No | Form 4 |
| Chu Steven | Oct 23, 2024 | Oct 25, 2024 | A · derivative | 173,554 | $0.78 | $135,372 | 173,554 | No | Form 4 |
| Chu Steven | Oct 23, 2024 | Oct 25, 2024 | A · derivative | 173,554 | $0.62 | $107,603 | 173,554 | No | Form 4 |
| Sun KangChief Executive Officer | Oct 23, 2024 | Oct 25, 2024 | A · derivative | 208,265 | $0.62 | $129,124 | 208,265 | No | Form 4 |
| Sun KangChief Executive Officer | Oct 23, 2024 | Oct 25, 2024 | A · derivative | 208,264 | $2.44 | $508,164 | 208,264 | No | Form 4 |
| Sun KangChief Executive Officer | Oct 23, 2024 | Oct 25, 2024 | A · derivative | 41,653 | $0.62 | $25,825 | 41,653 | No | Form 4 |
| Sun KangChief Executive Officer | Oct 23, 2024 | Oct 25, 2024 | A · derivative | 202,934 | $0.98 | $198,875 | 202,934 | No | Form 4 |
| Sun KangChief Executive Officer | Oct 23, 2024 | Oct 25, 2024 | A · derivative | 1,171,476 | $0.78 | $913,751 | 1,171,476 | No | Form 4 |
| Sun KangChief Executive Officer | Oct 23, 2024 | Oct 25, 2024 | A · derivative | 1,974,502 | $3.68 | $7,266,167 | 1,974,502 | No | Form 4 |
| Sun KangChief Executive Officer | Oct 23, 2024 | Oct 25, 2024 | A · derivative | 967,539 | $2.50 | $2,418,848 | 967,539 | No | Form 4 |
| Stefan Constantin IonelChief Technology Officer | Oct 23, 2024 | Oct 25, 2024 | A · derivative | 3,471 | $0.98 | $3,402 | 3,471 | No | Form 4 |
| Stefan Constantin IonelChief Technology Officer | Oct 23, 2024 | Oct 25, 2024 | A · derivative | 41,653 | $0.62 | $25,825 | 41,653 | No | Form 4 |
| Stefan Constantin IonelChief Technology Officer | Oct 23, 2024 | Oct 25, 2024 | A · derivative | 139,613 | $3.68 | $513,776 | 139,613 | No | Form 4 |
| Bornstein JonathanPresident of Amprius Lab | Oct 23, 2024 | Oct 25, 2024 | A · derivative | 3,471 | $0.98 | $3,402 | 3,471 | No | Form 4 |
| Bornstein JonathanPresident of Amprius Lab | Oct 23, 2024 | Oct 25, 2024 | A · derivative | 27,768 | $0.62 | $17,216 | 27,768 | No | Form 4 |
| Mirro Justin E | Sep 5, 2024 | Sep 5, 2024 | S | 110,000 | $0.81 | Sale −$89,100 | 2,073,042 | No | Form 4 |
| Mirro Justin E | Sep 5, 2024 | Sep 5, 2024 | S | 140,000 | $0.81 | Sale −$113,400 | 1,195,000 | No | Form 4 |
| Amprius, Inc. | Sep 4, 2024 | Sep 5, 2024 | S | 13,255 | $0.95 | Sale −$12,592 | 65,195,997 | No | Form 4 |
| Mirro Justin E | Sep 4, 2024 | Sep 5, 2024 | S | 150,000 | $0.94 | Sale −$141,000 | 2,183,042 | No | Form 4 |
| Mirro Justin E | Sep 4, 2024 | Sep 5, 2024 | S | 175,000 | $0.94 | Sale −$164,500 | 1,335,000 | No | Form 4 |
| Amprius, Inc. | Sep 3, 2024 | Sep 5, 2024 | S | 6,300 | $1.00 | Sale −$6,300 | 65,209,252 | No | Form 4 |
| Mirro Justin E | Sep 3, 2024 | Sep 5, 2024 | S | 60,000 | $1.00 | Sale −$60,000 | 2,333,042 | No | Form 4 |
| Mirro Justin E | Sep 3, 2024 | Sep 5, 2024 | S | 75,000 | $1.00 | Sale −$75,000 | 1,510,000 | No | Form 4 |
| Stefan Constantin IonelChief Technology Officer | Aug 21, 2024 | Aug 22, 2024 | S | 8,800 | $1.04 | Sale −$9,152 | 386,168 | No | Form 4 |
| Sun KangChief Executive Officer | Aug 21, 2024 | Aug 22, 2024 | S | 33,333 | $1.04 | Sale −$34,666 | 1,350,753 | No | Form 4 |
| Bornstein JonathanPresident of Amprius Lab | Aug 21, 2024 | Aug 22, 2024 | S | 18,644 | $1.04 | Sale −$19,390 | 1,528,251 | No | Form 4 |
| Wallach SandraChief Financial Officer | Aug 21, 2024 | Aug 22, 2024 | S | 17,606 | $1.04 | Sale −$18,310 | 713,300 | No | Form 4 |
| Satterthwaite Livingston | Aug 13, 2024 | Aug 14, 2024 | A | 283,019 | $0.00 | $0 | 291,639 | No | Form 4 |
| Mirro Justin E | Jul 23, 2024 | Jul 25, 2024 | A | 925,900 | not reported | not reported | 2,393,042 | No | Form 4 |
| Mirro Justin E | Jul 23, 2024 | Jul 25, 2024 | D · derivative | 4,700,000 | not reported | not reported | not reported | No | Form 4 |
| Mirro Justin E | Jun 14, 2024 | Jun 14, 2024 | S | 195,000 | $1.13 | Sale −$220,350 | 1,467,142 | No | Form 4 |
| Mirro Justin E | Jun 14, 2024 | Jun 14, 2024 | S | 65,000 | $1.13 | Sale −$73,450 | 1,585,000 | No | Form 4 |
| Mirro Justin E | Jun 13, 2024 | Jun 14, 2024 | S | 195,000 | $1.21 | Sale −$235,950 | 1,662,142 | No | Form 4 |
| Mirro Justin E | Jun 13, 2024 | Jun 14, 2024 | S | 65,000 | $1.22 | Sale −$79,300 | 1,650,000 | No | Form 4 |
| Mirro Justin E | Jun 12, 2024 | Jun 14, 2024 | S | 210,000 | $1.30 | Sale −$273,000 | 1,857,142 | No | Form 4 |
| Mirro Justin E | Jun 12, 2024 | Jun 14, 2024 | S | 70,000 | $1.30 | Sale −$91,000 | 1,715,000 | No | Form 4 |
| Dixon Donald R | Jun 7, 2024 | Jun 7, 2024 | A | 125,000 | $0.00 | $0 | 142,895 | No | Form 4 |
| Mirro Justin E | Jun 7, 2024 | Jun 7, 2024 | A | 125,000 | $0.00 | $0 | 142,895 | No | Form 4 |
| Gustanski Mary | Jun 7, 2024 | Jun 7, 2024 | A | 114,583 | $0.00 | $0 | 146,396 | No | Form 4 |
| Chu Steven | Jun 7, 2024 | Jun 7, 2024 | A | 125,000 | $0.00 | $0 | 145,395 | No | Form 4 |
| Bayless Kathleen A | Jun 7, 2024 | Jun 7, 2024 | A | 125,000 | $0.00 | $0 | 161,253 | No | Form 4 |
| HSIEH Wen Hsuan | Jun 7, 2024 | Jun 7, 2024 | A | 125,000 | $0.00 | $0 | 142,895 | No | Form 4 |
| Sun KangSee Remarks | May 22, 2024 | May 24, 2024 | S | 15,611 | $1.36 | Sale −$21,231 | 1,384,086 | No | Form 4 |
| Wallach SandraChief Financial Officer | May 22, 2024 | May 24, 2024 | S | 8,245 | $1.36 | Sale −$11,213 | 730,906 | No | Form 4 |
| Stefan Constantin IonelChief Technology Officer | May 22, 2024 | May 24, 2024 | S | 4,121 | $1.36 | Sale −$5,605 | 394,968 | No | Form 4 |
| Bornstein JonathanPresident of Amprius Lab | May 22, 2024 | May 24, 2024 | S | 8,731 | $1.36 | Sale −$11,874 | 1,546,895 | No | Form 4 |
| Sun KangSee Remarks | May 21, 2024 | May 24, 2024 | S | 19,973 | $1.33 | Sale −$26,564 | 1,399,697 | No | Form 4 |
| Wallach SandraChief Financial Officer | May 21, 2024 | May 24, 2024 | S | 10,549 | $1.33 | Sale −$14,030 | 739,151 | No | Form 4 |
| Stefan Constantin IonelChief Technology Officer | May 21, 2024 | May 24, 2024 | S | 5,272 | $1.33 | Sale −$7,012 | 399,089 | No | Form 4 |
| Bornstein JonathanPresident of Amprius Lab | May 21, 2024 | May 24, 2024 | S | 11,171 | $1.33 | Sale −$14,857 | 1,555,626 | No | Form 4 |
| Bornstein JonathanPresident of Amprius Lab | Apr 12, 2024 | Apr 15, 2024 | M | 1,007,867 | $0.05 | $50,393 | 1,566,797 | No | Form 4 |
| Bornstein JonathanPresident of Amprius Lab | Apr 12, 2024 | Apr 15, 2024 | M · derivative | 1,007,867 | $0.05 | $50,393 | 1 | No | Form 4 |
| Bornstein JonathanPresident of Amprius Lab | Apr 2, 2024 | Apr 3, 2024 | M | 125,983 | $0.05 | $6,299 | 684,913 | Yes | Form 4 |
| Bornstein JonathanPresident of Amprius Lab | Apr 2, 2024 | Apr 3, 2024 | S | 125,983 | $2.38 | Sale −$299,840 | 558,930 | Yes | Form 4 |
| Bornstein JonathanPresident of Amprius Lab | Apr 2, 2024 | Apr 3, 2024 | M · derivative | 125,983 | $0.05 | $6,299 | 1,007,868 | Yes | Form 4 |
| Sun KangSee Remarks | Mar 19, 2024 | Mar 19, 2024 | A | 1,419,670 | $0.00 | $0 | 1,419,670 | No | Form 4 |
| Wallach SandraChief Financial Officer | Mar 19, 2024 | Mar 19, 2024 | A | 749,700 | $0.00 | $0 | 749,700 | No | Form 4 |
| Bornstein JonathanPresident of Amprius Lab | Mar 19, 2024 | Mar 19, 2024 | A | 558,930 | $0.00 | $0 | 558,930 | No | Form 4 |
| Stefan Constantin IonelChief Technology Officer | Mar 19, 2024 | Mar 19, 2024 | A | 374,570 | $0.00 | $0 | 404,361 | No | Form 4 |
| Bornstein JonathanPresident of Amprius Lab | Mar 6, 2024 | Mar 7, 2024 | M | 40,200 | $0.05 | $2,010 | 40,200 | Yes | Form 4 |
| Bornstein JonathanPresident of Amprius Lab | Mar 6, 2024 | Mar 7, 2024 | S | 40,200 | $2.78 | Sale −$111,756 | not reported | Yes | Form 4 |
| Bornstein JonathanPresident of Amprius Lab | Mar 6, 2024 | Mar 7, 2024 | M · derivative | 40,200 | $0.05 | $2,010 | 1,133,851 | Yes | Form 4 |
| Bornstein JonathanPresident of Amprius Lab | Mar 5, 2024 | Mar 7, 2024 | M | 109,800 | $0.05 | $5,490 | 109,800 | Yes | Form 4 |
| Bornstein JonathanPresident of Amprius Lab | Mar 5, 2024 | Mar 7, 2024 | S | 109,800 | $2.92 | Sale −$320,616 | not reported | Yes | Form 4 |
| Bornstein JonathanPresident of Amprius Lab | Mar 5, 2024 | Mar 7, 2024 | M · derivative | 109,800 | $0.05 | $5,490 | 1,174,051 | Yes | Form 4 |
| Bornstein JonathanPresident of Amprius Lab | Feb 6, 2024 | Feb 7, 2024 | M | 150,000 | $0.05 | $7,500 | 150,000 | Yes | Form 4 |
| Bornstein JonathanPresident of Amprius Lab | Feb 6, 2024 | Feb 7, 2024 | S | 150,000 | $4.43 | Sale −$664,500 | not reported | Yes | Form 4 |
| Bornstein JonathanPresident of Amprius Lab | Feb 6, 2024 | Feb 7, 2024 | M · derivative | 150,000 | $0.05 | $7,500 | 1,283,851 | Yes | Form 4 |
| Bornstein JonathanPresident of Amprius Lab | Jan 2, 2024 | Jan 4, 2024 | M | 150,000 | $0.05 | $7,500 | 150,000 | Yes | Form 4 |
| Bornstein JonathanPresident of Amprius Lab | Jan 2, 2024 | Jan 4, 2024 | S | 124,634 | $4.32 | Sale −$538,419 | 25,366 | Yes | Form 4 |
| Bornstein JonathanPresident of Amprius Lab | Jan 2, 2024 | Jan 4, 2024 | S | 25,366 | $5.05 | Sale −$128,098 | not reported | Yes | Form 4 |
| Bornstein JonathanPresident of Amprius Lab | Jan 2, 2024 | Jan 4, 2024 | M · derivative | 150,000 | $0.05 | $7,500 | 1,433,851 | Yes | Form 4 |
| Amprius, Inc. | Dec 15, 2023 | Dec 15, 2023 | S | 100,000 | $3.54 | Sale −$354,000 | 65,215,552 | No | Form 4 |
| Amprius, Inc. | Dec 14, 2023 | Dec 15, 2023 | S | 100,000 | $3.55 | Sale −$355,000 | 65,315,552 | No | Form 4 |
| Amprius, Inc. | Dec 13, 2023 | Dec 15, 2023 | S | 100,000 | $3.62 | Sale −$362,000 | 65,415,552 | No | Form 4 |
| Mirro Justin E | Dec 14, 2023 | Dec 14, 2023 | S | 170,000 | $3.56 | Sale −$605,200 | 2,067,142 | No | Form 4 |
| Mirro Justin E | Dec 14, 2023 | Dec 14, 2023 | S | 85,000 | $3.56 | Sale −$302,600 | 1,785,000 | No | Form 4 |
| Mirro Justin E | Dec 13, 2023 | Dec 14, 2023 | S | 60,000 | $3.68 | Sale −$220,800 | 2,237,142 | No | Form 4 |
| Mirro Justin E | Dec 13, 2023 | Dec 14, 2023 | S | 30,000 | $3.68 | Sale −$110,400 | 1,870,000 | No | Form 4 |
| Mirro Justin E | Dec 12, 2023 | Dec 14, 2023 | S | 40,000 | $3.81 | Sale −$152,400 | 2,297,142 | No | Form 4 |
| Mirro Justin E | Dec 12, 2023 | Dec 14, 2023 | S | 20,000 | $3.81 | Sale −$76,200 | 1,900,000 | No | Form 4 |
| Mirro Justin E | Dec 7, 2023 | Dec 7, 2023 | S | 20,000 | $3.88 | Sale −$77,600 | 2,337,142 | No | Form 4 |
| Mirro Justin E | Dec 7, 2023 | Dec 7, 2023 | S | 10,000 | $3.88 | Sale −$38,800 | 1,920,000 | No | Form 4 |
| Bornstein JonathanPresident of Amprius Lab | Dec 7, 2023 | Dec 7, 2023 | M | 54,477 | $0.05 | $2,724 | 54,477 | Yes | Form 4 |
| Bornstein JonathanPresident of Amprius Lab | Dec 7, 2023 | Dec 7, 2023 | S | 54,477 | $3.88 | Sale −$211,371 | not reported | Yes | Form 4 |
| Bornstein JonathanPresident of Amprius Lab | Dec 7, 2023 | Dec 7, 2023 | M · derivative | 54,477 | $0.05 | $2,724 | 1,583,851 | Yes | Form 4 |
| Mirro Justin E | Dec 6, 2023 | Dec 7, 2023 | S | 20,000 | $4.05 | Sale −$81,000 | 2,357,142 | No | Form 4 |
| Mirro Justin E | Dec 6, 2023 | Dec 7, 2023 | S | 10,000 | $4.05 | Sale −$40,500 | 1,930,000 | No | Form 4 |
| Bornstein JonathanPresident of Amprius Lab | Dec 6, 2023 | Dec 7, 2023 | M | 47,767 | $0.05 | $2,388 | 47,767 | Yes | Form 4 |
| Bornstein JonathanPresident of Amprius Lab | Dec 6, 2023 | Dec 7, 2023 | S | 47,767 | $4.02 | Sale −$192,023 | not reported | Yes | Form 4 |
| Bornstein JonathanPresident of Amprius Lab | Dec 6, 2023 | Dec 7, 2023 | M · derivative | 47,767 | $0.05 | $2,388 | 1,638,328 | Yes | Form 4 |
| Mirro Justin E | Dec 5, 2023 | Dec 7, 2023 | S | 20,000 | $4.33 | Sale −$86,600 | 2,377,142 | No | Form 4 |
| Mirro Justin E | Dec 5, 2023 | Dec 7, 2023 | S | 10,000 | $4.31 | Sale −$43,100 | 1,940,000 | No | Form 4 |
| Bornstein JonathanPresident of Amprius Lab | Dec 5, 2023 | Dec 7, 2023 | M | 47,756 | $0.05 | $2,388 | 47,756 | Yes | Form 4 |
| Bornstein JonathanPresident of Amprius Lab | Dec 5, 2023 | Dec 7, 2023 | S | 47,756 | $4.28 | Sale −$204,396 | not reported | Yes | Form 4 |
| Bornstein JonathanPresident of Amprius Lab | Dec 5, 2023 | Dec 7, 2023 | M · derivative | 47,756 | $0.05 | $2,388 | 1,686,095 | Yes | Form 4 |
| Mirro Justin E | Nov 30, 2023 | Nov 30, 2023 | S | 30,000 | $4.19 | Sale −$125,700 | 2,397,142 | No | Form 4 |
| Mirro Justin E | Nov 30, 2023 | Nov 30, 2023 | S | 15,000 | $4.18 | Sale −$62,700 | 1,950,000 | No | Form 4 |
| Mirro Justin E | Nov 29, 2023 | Nov 30, 2023 | S | 40,000 | $4.01 | Sale −$160,400 | 2,427,142 | No | Form 4 |
| Mirro Justin E | Nov 29, 2023 | Nov 30, 2023 | S | 20,000 | $4.01 | Sale −$80,200 | 1,965,000 | No | Form 4 |
| Mirro Justin E | Nov 28, 2023 | Nov 30, 2023 | S | 30,000 | $3.71 | Sale −$111,300 | 2,467,142 | No | Form 4 |
| Mirro Justin E | Nov 28, 2023 | Nov 30, 2023 | S | 15,000 | $3.70 | Sale −$55,500 | 1,985,000 | No | Form 4 |
| Bornstein JonathanPresident of Amprius Lab | Nov 20, 2023 | Nov 21, 2023 | M | 27,631 | $0.05 | $1,382 | 27,631 | Yes | Form 4 |
| Bornstein JonathanPresident of Amprius Lab | Nov 20, 2023 | Nov 21, 2023 | S | 27,631 | $3.84 | Sale −$106,103 | not reported | Yes | Form 4 |
| Bornstein JonathanPresident of Amprius Lab | Nov 20, 2023 | Nov 21, 2023 | M · derivative | 27,631 | $0.05 | $1,382 | 1,733,851 | Yes | Form 4 |
| Bornstein JonathanPresident of Amprius Lab | Nov 9, 2023 | Nov 9, 2023 | M | 49,508 | $0.05 | $2,475 | 49,508 | Yes | Form 4 |
| Bornstein JonathanPresident of Amprius Lab | Nov 9, 2023 | Nov 9, 2023 | S | 49,508 | $2.82 | Sale −$139,613 | not reported | Yes | Form 4 |
| Bornstein JonathanPresident of Amprius Lab | Nov 9, 2023 | Nov 9, 2023 | M · derivative | 49,508 | $0.05 | $2,475 | 1,761,482 | Yes | Form 4 |
| Bornstein JonathanPresident of Amprius Lab | Nov 8, 2023 | Nov 9, 2023 | M | 48,052 | $0.05 | $2,403 | 48,052 | Yes | Form 4 |
| Bornstein JonathanPresident of Amprius Lab | Nov 8, 2023 | Nov 9, 2023 | S | 48,052 | $3.05 | Sale −$146,559 | not reported | Yes | Form 4 |
| Bornstein JonathanPresident of Amprius Lab | Nov 8, 2023 | Nov 9, 2023 | M · derivative | 48,052 | $0.05 | $2,403 | 1,810,990 | Yes | Form 4 |
| Bornstein JonathanPresident of Amprius Lab | Nov 7, 2023 | Nov 9, 2023 | M | 24,809 | $0.05 | $1,240 | 24,809 | Yes | Form 4 |
| Bornstein JonathanPresident of Amprius Lab | Nov 7, 2023 | Nov 9, 2023 | S | 24,809 | $3.24 | Sale −$80,381 | not reported | Yes | Form 4 |
| Bornstein JonathanPresident of Amprius Lab | Nov 7, 2023 | Nov 9, 2023 | M · derivative | 24,809 | $0.05 | $1,240 | 1,859,042 | Yes | Form 4 |
| Bornstein JonathanPresident of Amprius Lab | Oct 12, 2023 | Oct 12, 2023 | M | 22,969 | $0.05 | $1,148 | 22,969 | Yes | Form 4 |
| Bornstein JonathanPresident of Amprius Lab | Oct 12, 2023 | Oct 12, 2023 | S | 22,969 | $3.90 | Sale −$89,579 | not reported | Yes | Form 4 |
| Bornstein JonathanPresident of Amprius Lab | Oct 12, 2023 | Oct 12, 2023 | M · derivative | 22,969 | $0.05 | $1,148 | 1,883,851 | Yes | Form 4 |
| Bornstein JonathanPresident of Amprius Lab | Oct 11, 2023 | Oct 12, 2023 | M | 56,702 | $0.05 | $2,835 | 56,702 | Yes | Form 4 |
| Bornstein JonathanPresident of Amprius Lab | Oct 11, 2023 | Oct 12, 2023 | S | 56,702 | $4.16 | Sale −$235,880 | not reported | Yes | Form 4 |
| Bornstein JonathanPresident of Amprius Lab | Oct 11, 2023 | Oct 12, 2023 | M · derivative | 56,702 | $0.05 | $2,835 | 1,906,820 | Yes | Form 4 |
| Bornstein JonathanPresident of Amprius Lab | Oct 10, 2023 | Oct 12, 2023 | M | 70,329 | $0.05 | $3,516 | 70,329 | Yes | Form 4 |
| Bornstein JonathanPresident of Amprius Lab | Oct 10, 2023 | Oct 12, 2023 | S | 70,329 | $4.36 | Sale −$306,634 | not reported | Yes | Form 4 |
| Bornstein JonathanPresident of Amprius Lab | Oct 10, 2023 | Oct 12, 2023 | M · derivative | 70,329 | $0.05 | $3,516 | 1,963,522 | Yes | Form 4 |