Only open-market buys / sells (codes P/S) are a conviction signal; grants, option exercises, tax-withholding, and gifts are compensation mechanics, shown but greyed. The trailing 12-month tallies run to today but the store covers filings through 2026-06-30 only (SEC bulk data sets publish quarterly), so recent activity may be absent.
| Date | Insider | Role | Transaction | Shares | Price | Value |
|---|---|---|---|---|---|---|
| 2026-06-15 | DIXON DONALD R | Director | −Sell | 85,000 | $17.17 | $1M |
| 2026-06-12 | Chu Steven | Director | +Grant | 10,423 | — | — |
| 2026-06-12 | DIXON DONALD R | Director | +Grant | 10,423 | — | — |
| 2026-06-12 | SATTERTHWAITE LIVINGSTON | Director | +Grant | 10,423 | — | — |
| 2026-06-12 | BAYLESS KATHLEEN A | Director | +Grant | 10,423 | — | — |
| 2026-06-09 | DIXON DONALD R | Director | −Sell | 40,000 | $19.13 | $765,200 |
| 2026-06-04 | Stepien Thomas M | Director,Officer | −Gift | 36,914 | — | — |
| 2026-06-04 | Stepien Thomas M | Director,Officer | −Gift | 30,384 | — | — |
| 2026-06-04 | Stepien Thomas M | Director,Officer | −Sell | 2,000 | $20.97 | $41,940 |
| 2026-06-04 | Stepien Thomas M | Director,Officer | +Gift | 36,914 | — | — |
| 2026-05-27 | Stefan Constantin Ionel | Officer | −Sell | 3,208 | $17.19 | $55,146 |
| 2026-05-27 | Stepien Thomas M | Director,Officer | −Sell | 4,375 | $17.19 | $75,206 |
| 2026-05-27 | Sun Kang | Director | −Sell | 356 | $17.19 | $6,120 |
| 2026-05-26 | DIXON DONALD R | Director | −Sell | 17,895 | $17.90 | $320,321 |
| 2026-05-21 | Stepien Thomas M | Director,Officer | −Sell | 60,702 | $14.79 | $897,783 |
| 2026-05-21 | Stefan Constantin Ionel | Officer | −Sell | 28,812 | $14.79 | $426,129 |
| 2026-05-21 | Sun Kang | Director | −Sell | 67,796 | $14.79 | $1M |
| 2026-05-05 | Sun Kang | Director | +Grant | 6,250 | — | — |
| 2026-04-01 | Sun Kang | Director | −Sell | 249,037 | $16.78 | $4M |
| 2026-04-01 | Sun Kang | Director | +Exercise | 1,312,505 | $1.78 | $2M |
| 2026-04-01 | Sun Kang | Director | +Exercise | 187,495 | $3.68 | $689,982 |
| 2026-04-01 | Sun Kang | Director | −Sell | 1,250,963 | $15.73 | $20M |
| 2026-03-23 | Sun Kang | Director | −Sell | 152,823 | $18.69 | $3M |
| 2026-03-23 | Sun Kang | Director | −Sell | 65,046 | $19.06 | $1M |
| 2026-03-12 | Chu Steven | Director | −Sell | 5,565 | $18.53 | $103,119 |
| 2026-03-12 | Chu Steven | Director | +Exercise | 69,422 | $0.62 | $43,042 |
| 2026-03-12 | Chu Steven | Director | +Exercise | 86,143 | $2.61 | $224,833 |
| 2026-03-12 | Chu Steven | Director | −Sell | 100,000 | $18.65 | $2M |
| 2026-03-12 | Chu Steven | Director | −Sell | 50,000 | $18.21 | $910,500 |
| 2026-03-12 | HSIEH Wen Hsuan | Director | −Sell | 130,646 | $18.22 | $2M |
| 2026-03-12 | HSIEH Wen Hsuan | Director | −Sell | 282,500 | $18.55 | $5M |
| 2026-03-12 | HSIEH Wen Hsuan | Director | +Exercise | 270,251 | $2.61 | $705,355 |
| 2026-03-10 | Chu Steven | Director | −Sell | 166,632 | $17.92 | $3M |
| 2026-03-10 | Chu Steven | Director | +Exercise | 104,132 | $0.62 | $64,562 |
| 2026-03-04 | Stefan Constantin Ionel | Officer | +Grant | 110,000 | — | — |
| 2026-03-04 | Stepien Thomas M | Director,Officer | +Grant | 150,000 | — | — |
| 2026-03-04 | RODRIGUEZ RICARDO C. | Officer | +Grant | 150,000 | — | — |
| 2026-03-04 | RODRIGUEZ RICARDO C. | Officer | +Grant | 150,000 | — | — |
| 2026-02-23 | Stefan Constantin Ionel | Officer | −Sell | 25,366 | $10.16 | $257,719 |
| 2026-02-23 | Sun Kang | Director | −Sell | 61,251 | $10.16 | $622,310 |
| 2026-01-28 | Stefan Constantin Ionel | Officer | −Sell | 39,690 | $12.00 | $476,280 |
| 2026-01-28 | Stefan Constantin Ionel | Officer | +Exercise | 90 | $0.62 | $56 |
| 2026-01-28 | Stefan Constantin Ionel | Officer | +Exercise | 39,600 | $0.05 | $1,980 |
| 2026-01-23 | Stefan Constantin Ionel | Officer | −Sell | 1,600 | $12.00 | $19,200 |
| 2026-01-23 | Stefan Constantin Ionel | Officer | +Exercise | 1,600 | $0.05 | $80 |
| 2026-01-22 | Stefan Constantin Ionel | Officer | +Exercise | 253,928 | $0.05 | $12,696 |
| 2026-01-22 | Stefan Constantin Ionel | Officer | +Exercise | 72,795 | $0.45 | $32,758 |
| 2026-01-22 | Stefan Constantin Ionel | Officer | +Exercise | 166,104 | $0.05 | $8,305 |
| 2026-01-22 | Stefan Constantin Ionel | Officer | −Sell | 492,827 | $12.04 | $6M |
| 2026-01-21 | Stefan Constantin Ionel | Officer | +Exercise | 15,883 | $0.05 | $794 |
| 2026-01-21 | Stefan Constantin Ionel | Officer | −Sell | 73,280 | $12.00 | $879,360 |
| 2026-01-21 | Stefan Constantin Ionel | Officer | +Exercise | 41,563 | $0.62 | $25,769 |
| 2026-01-21 | Stefan Constantin Ionel | Officer | +Exercise | 15,834 | $0.05 | $792 |
| 2026-01-20 | Sun Kang | Director | −Sell | 43,185 | $11.03 | $476,331 |
| 2026-01-20 | Sun Kang | Director | +Exercise | 43,185 | $1.78 | $76,869 |
| 2026-01-16 | Sun Kang | Director | +Exercise | 100,210 | $1.78 | $178,374 |
| 2026-01-16 | Sun Kang | Director | +Exercise | 850,338 | $2.50 | $2M |
| 2026-01-16 | Sun Kang | Director | −Sell | 950,548 | $11.07 | $11M |
| 2026-01-12 | Sun Kang | Director | +Exercise | 117,201 | $2.50 | $293,003 |
| 2026-01-12 | Sun Kang | Director | +Exercise | 208,264 | $2.44 | $508,164 |
| 2026-01-12 | Sun Kang | Director | +Exercise | 180,802 | $0.62 | $112,097 |
| 2026-01-12 | Sun Kang | Director | −Sell | 506,267 | $10.10 | $5M |
| 2025-12-19 | Stepien Thomas M | Director,Officer | +Grant | 200,000 | — | — |
| 2025-12-19 | Stepien Thomas M | Director,Officer | +Grant | 200,000 | — | — |
| 2025-12-11 | Stefan Constantin Ionel | Officer | −Sell | 198,255 | $10.51 | $2M |
| 2025-12-11 | Stefan Constantin Ionel | Officer | +Exercise | 125,000 | $0.05 | $6,250 |
| 2025-11-21 | Sun Kang | Director,Officer | −Sell | 68,655 | $10.08 | $692,042 |
| 2025-11-21 | Stefan Constantin Ionel | Officer | −Sell | 25,024 | $10.08 | $252,242 |
| 2025-11-17 | Sun Kang | Director,Officer | −Sell | 1,000,000 | $10.60 | $11M |
| 2025-11-17 | Sun Kang | Director,Officer | +Exercise | 727,950 | $0.05 | $36,398 |
| 2025-11-17 | Sun Kang | Director,Officer | +Exercise | 27,463 | $0.62 | $17,027 |
| 2025-11-17 | Sun Kang | Director,Officer | +Exercise | 41,653 | $0.62 | $25,825 |
| 2025-11-17 | Sun Kang | Director,Officer | +Exercise | 202,934 | $0.98 | $198,875 |
| 2025-10-06 | RODRIGUEZ RICARDO C. | Officer | +Grant | 200,000 | — | — |
| 2025-08-21 | Sun Kang | Director,Officer | −Sell | 65,654 | $6.82 | $447,760 |
| 2025-08-21 | Wallach Sandra | Officer | −Sell | 28,390 | $6.82 | $193,620 |
| 2025-08-21 | Stefan Constantin Ionel | Officer | −Sell | 19,159 | $6.82 | $130,664 |
| 2025-06-13 | Chu Steven | Director | +Grant | 44,444 | — | — |
| 2025-06-13 | BAYLESS KATHLEEN A | Director | +Grant | 44,444 | — | — |
| 2025-06-13 | SATTERTHWAITE LIVINGSTON | Director | +Grant | 44,444 | — | — |
| 2025-06-13 | DIXON DONALD R | Director | +Grant | 44,444 | — | — |
| 2025-06-13 | HSIEH Wen Hsuan | Director | +Grant | 44,444 | — | — |
| 2025-05-21 | Sun Kang | Director,Officer | −Sell | 69,786 | $2.43 | $169,580 |
| 2025-05-21 | Wallach Sandra | Officer | −Sell | 27,595 | $2.43 | $67,056 |
| 2025-05-21 | Stefan Constantin Ionel | Officer | −Sell | 20,366 | $2.43 | $49,489 |
| 2025-05-01 | Stepien Thomas M | Director,Officer | +Grant | 400,000 | — | — |
| 2025-03-19 | Stefan Constantin Ionel | Officer | +Grant | 461,540 | — | — |
| 2025-03-19 | Wallach Sandra | Officer | +Grant | 383,260 | — | — |
| 2025-03-19 | Sun Kang | Director,Officer | +Grant | 599,400 | — | — |
| 2025-03-14 | Stefan Constantin Ionel | Officer | +Exercise | 3,471 | $0.98 | $3,402 |
| 2025-03-10 | Bornstein Jonathan | Officer | +Exercise | 3,471 | $0.98 | $3,402 |
| 2025-02-21 | Bornstein Jonathan | Officer | −Sell | 13,527 | $3.13 | $42,340 |
| 2025-02-21 | Stefan Constantin Ionel | Officer | −Sell | 9,066 | $3.13 | $28,377 |
| 2025-02-21 | Wallach Sandra | Officer | −Sell | 18,142 | $3.13 | $56,784 |
| 2025-02-21 | Sun Kang | Director,Officer | −Sell | 34,353 | $3.13 | $107,525 |
| 2024-11-21 | Stefan Constantin Ionel | Officer | −Sell | 8,575 | $1.96 | $16,807 |
| 2024-11-21 | Wallach Sandra | Officer | −Sell | 17,158 | $1.96 | $33,630 |
| 2024-11-21 | Bornstein Jonathan | Officer | −Sell | 15,000 | $1.96 | $29,400 |
| 2024-11-21 | Bornstein Jonathan | Officer | −Sell | 18,170 | $1.96 | $35,613 |
| 2024-11-21 | Sun Kang | Director,Officer | −Sell | 33,779 | $1.96 | $66,207 |
| 2024-11-20 | Bornstein Jonathan | Officer | −Sell | 133,536 | $1.92 | $256,389 |
| 2024-10-23 | Amprius, Inc. | TenPercentOwner | −Other | 5,500,000 | — | — |
| 2024-10-23 | Amprius, Inc. | TenPercentOwner | −Other | 57,195,926 | — | — |
| 2024-09-05 | MIRRO JUSTIN E | Director | −Sell | 140,000 | $0.81 | $113,400 |
| 2024-09-05 | MIRRO JUSTIN E | Director | −Sell | 110,000 | $0.81 | $89,100 |
| 2024-09-04 | Amprius, Inc. | TenPercentOwner | −Sell | 13,255 | $0.95 | $12,592 |
| 2024-09-04 | MIRRO JUSTIN E | Director | −Sell | 175,000 | $0.94 | $164,500 |
| 2024-09-04 | MIRRO JUSTIN E | Director | −Sell | 150,000 | $0.94 | $141,000 |
| 2024-09-03 | Amprius, Inc. | TenPercentOwner | −Sell | 6,300 | $1.00 | $6,300 |
| 2024-09-03 | MIRRO JUSTIN E | Director | −Sell | 60,000 | $1.00 | $60,000 |
| 2024-09-03 | MIRRO JUSTIN E | Director | −Sell | 75,000 | $1.00 | $75,000 |
| 2024-08-21 | Stefan Constantin Ionel | Officer | −Sell | 8,800 | $1.04 | $9,152 |
| 2024-08-21 | Sun Kang | Director,Officer | −Sell | 33,333 | $1.04 | $34,666 |
| 2024-08-21 | Bornstein Jonathan | Officer | −Sell | 18,644 | $1.04 | $19,390 |
| 2024-08-21 | Wallach Sandra | Officer | −Sell | 17,606 | $1.04 | $18,310 |
| 2024-08-13 | SATTERTHWAITE LIVINGSTON | Director | +Grant | 283,019 | — | — |
| 2024-07-23 | MIRRO JUSTIN E | Director | +Grant | 925,900 | — | — |
| 2024-06-14 | MIRRO JUSTIN E | Director | −Sell | 65,000 | $1.13 | $73,450 |
| 2024-06-14 | MIRRO JUSTIN E | Director | −Sell | 195,000 | $1.13 | $220,350 |
| 2024-06-13 | MIRRO JUSTIN E | Director | −Sell | 65,000 | $1.22 | $79,300 |
Source: the SEC bulk insider (Form 3/4/5) data sets — non-derivative transactions in the issuer's common stock, most recent first, covering filings through 2026-06-30. Insiders file within 2 business days of a transaction, but the bulk sets publish quarterly, so this store lags live filings; option/derivative lines are excluded. Codes: P buy · S sell · A grant · M/X/C exercise · F tax · G gift.
Model-derived estimate for research. See the Disclaimer.
