AMPX Amprius Technologies, Inc.
NYSE · SEC CIK 1899287 · EDGAR
- Bought, last 12 months
- $0 0 purchases by 0 insiders
- Sold, last 12 months
- $85.69M 27 sales by 6 insiders
- Filings on record
- 126 since 2022-09-16, latest 2026-08-25 17:22
BoughtSold
Most active insiders, 12 months
| Insider | Title | Bought | Sold |
|---|---|---|---|
| Sun Kang | Dir | — | $57.63M |
| Stefan Constantin Ionel | CTO | — | $10.69M |
| HSIEH Wen Hsuan | Dir | — | $7.62M |
| Chu Steven | Dir | — | $5.86M |
| DIXON DONALD R | Dir | — | $2.54M |
| Stepien Thomas M | Pres, Dir | — | $1.34M |
| RODRIGUEZ RICARDO C. | CFO | — | — |
| SATTERTHWAITE LIVINGSTON | Dir | — | — |
| BAYLESS KATHLEEN A | Dir | — | — |
Transactions 142
| X | Filed | Traded | Ticker | Insider | Title | Type | Price | Qty | Owned | ΔOwn | Value |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 2026-08-25 17:22 | 2026-08-21 | AMPX | Sun Kang | Dir | S - Sale | $10.34 | -62.1K | 1.22M | -5% | -$642.2K | |
| 2026-08-25 17:22 | 2026-08-21 | AMPX | Stefan Constantin Ionel | CTO | S - Sale | $10.34 | -29.7K | 771.6K | -4% | -$306.9K | |
| M | 2026-08-25 17:21 | 2026-08-21+ | AMPX | Stepien Thomas M | CEO, Dir | S - Sale | $10.26 | -31.5K | 594.1K | -5% | -$323.6K |
| M | 2026-08-25 17:21 | 2026-08-25 | AMPX | Stepien Thomas M | CEO, Dir | G - Gift | $0.00 | -15.3K | 578.8K | -3% | $0 |
| I | 2026-08-25 17:21 | 2026-08-25 | AMPX | Stepien Thomas M | CEO, Dir | A - Grant | $0.00 | +346 | 37.3K | +0.9% | $0 |
| 2026-06-16 18:03 | 2026-06-12 | AMPX | BAYLESS KATHLEEN A | Dir | A - Grant | $0.00 | +10.4K | 216.1K | +5% | $0 | |
| 2026-06-16 18:01 | 2026-06-12 | AMPX | SATTERTHWAITE LIVINGSTON | Dir | A - Grant | $0.00 | +10.4K | 346.5K | +3% | $0 | |
| 2026-06-16 18:00 | 2026-06-12 | AMPX | DIXON DONALD R | Dir | A - Grant | $0.00 | +10.4K | 280.1K | +4% | $0 | |
| I | 2026-06-16 18:00 | 2026-06-15 | AMPX | DIXON DONALD R | Dir | S - Sale | $17.17 | -85.0K | 359.4K | -19% | -$1.46M |
| 2026-06-16 18:00 | 2026-06-12 | AMPX | Chu Steven | Dir | A - Grant | $0.00 | +10.4K | 137.8K | +8% | $0 | |
| I | 2026-06-11 17:56 | 2026-06-09 | AMPX | DIXON DONALD R | Dir | S - Sale | $19.13 | -40.0K | 444.4K | -8% | -$765.2K |
| M | 2026-06-05 16:57 | 2026-06-04 | AMPX | Stepien Thomas M | CEO, Dir | G - Gift | $0.00 | -67.3K | 627.6K | -10% | $0 |
| I | 2026-06-05 16:57 | 2026-06-04 | AMPX | Stepien Thomas M | CEO, Dir | G - Gift | $0.00 | +36.9K | 36.9K | New | $0 |
| 2026-06-05 16:57 | 2026-06-04 | AMPX | Stepien Thomas M | CEO, Dir | S - Sale | $20.97 | -2,000 | 625.6K | -0.3% | -$41.9K | |
| 2026-05-28 18:24 | 2026-05-27 | AMPX | Sun Kang | Dir | S - Sale | $17.19 | -356 | 1.28M | -0.0% | -$6,121 | |
| 2026-05-28 18:22 | 2026-05-27 | AMPX | Stepien Thomas M | CEO, Dir | S - Sale | $17.19 | -4,375 | 694.9K | -0.6% | -$75.2K | |
| 2026-05-28 18:12 | 2026-05-27 | AMPX | Stefan Constantin Ionel | CTO | S - Sale | $17.19 | -3,208 | 801.3K | -0.4% | -$55.2K | |
| I | 2026-05-28 18:10 | 2026-05-26 | AMPX | DIXON DONALD R | Dir | S - Sale | $17.90 | -17.9K | 484.4K | -4% | -$320.3K |
| 2026-05-26 19:31 | 2026-05-21 | AMPX | Sun Kang | Dir | S - Sale | $14.79 | -67.8K | 1.28M | -5% | -$1.00M | |
| 2026-05-26 19:10 | 2026-05-21 | AMPX | Stefan Constantin Ionel | CTO | S - Sale | $14.79 | -28.8K | 804.5K | -3% | -$426.1K | |
| 2026-05-26 19:03 | 2026-05-21 | AMPX | Stepien Thomas M | CEO, Dir | S - Sale | $14.79 | -60.7K | 699.3K | -8% | -$897.7K | |
| A | 2026-05-07 16:53 | 2025-12-19 | AMPX | Stepien Thomas M | CEO, Dir | A - Grant | $0.00 | +200.0K | 760.0K | +36% | $0 |
| 2026-05-07 16:51 | 2026-05-05 | AMPX | Sun Kang | Dir | A - Grant | $0.00 | +6,250 | 1.35M | +0.5% | $0 | |
| DM | 2026-04-02 16:51 | 2026-04-01 | AMPX | Sun Kang | Dir | M - OptEx | $2.02 | +1.50M | 2.84M | +112% | +$3.03M |
| DM | 2026-04-02 16:51 | 2026-04-01 | AMPX | Sun Kang | Dir | S - Sale+OE | $15.91 | -1.50M | 1.34M | -53% | -$23.86M |
| MI | 2026-03-24 | 2026-03-23 | AMPX | Sun Kang | Dir | S - Sale | $18.80 | -217.9K | 121.5K | -64% | -$4.10M |
| A | 2026-03-13 | 2026-03-04 | AMPX | RODRIGUEZ RICARDO C. | CFO | A - Grant | $0.00 | +150.0K | 350.0K | +75% | $0 |
| D | 2026-03-13 | 2026-03-12 | AMPX | HSIEH Wen Hsuan | Dir | M - OptEx | $2.61 | +270.3K | 457.6K | +144% | +$705.4K |
| DM | 2026-03-13 | 2026-03-12 | AMPX | HSIEH Wen Hsuan | Dir | S - Sale+OE | $18.45 | -413.1K | 44.4K | -90% | -$7.62M |
| DM | 2026-03-12 | 2026-03-10+ | AMPX | Chu Steven | Dir | S - Sale+OE | $18.20 | -322.2K | 127.3K | -72% | -$5.86M |
| DM | 2026-03-12 | 2026-03-10+ | AMPX | Chu Steven | Dir | M - OptEx | $1.28 | +259.7K | 294.0K | +758% | +$332.4K |
| 2026-03-06 | 2026-03-04 | AMPX | RODRIGUEZ RICARDO C. | CFO | A - Grant | $0.00 | +150.0K | 350.0K | +75% | $0 | |
| 2026-03-06 | 2026-03-04 | AMPX | Stepien Thomas M | CEO, Dir | A - Grant | $0.00 | +150.0K | 760.0K | +25% | $0 | |
| 2026-03-06 | 2026-03-04 | AMPX | Stefan Constantin Ionel | CTO | A - Grant | $0.00 | +110.0K | 833.3K | +15% | $0 | |
| 2026-02-24 | 2026-02-23 | AMPX | Sun Kang | Dir | S - Sale | $10.16 | -61.3K | 1.34M | -4% | -$622.3K | |
| 2026-02-24 | 2026-02-23 | AMPX | Stefan Constantin Ionel | CTO | S - Sale | $10.16 | -25.4K | 723.3K | -3% | -$257.7K | |
| DM | 2026-01-30 | 2026-01-28 | AMPX | Stefan Constantin Ionel | CTO | M - OptEx | $0.0513 | +39.7K | 748.8K | +6% | +$2,036 |
| D | 2026-01-30 | 2026-01-28 | AMPX | Stefan Constantin Ionel | CTO | S - Sale+OE | $12.00 | -39.7K | 748.7K | -5% | -$476.3K |
| DM | 2026-01-23 | 2026-01-21+ | AMPX | Stefan Constantin Ionel | CTO | S - Sale+OE | $12.03 | -567.7K | 748.7K | -43% | -$6.83M |
| DM | 2026-01-23 | 2026-01-21+ | AMPX | Stefan Constantin Ionel | CTO | M - OptEx | $0.143 | +567.7K | 822.0K | +223% | +$81.2K |
| DM | 2026-01-20 | 2026-01-16+ | AMPX | Sun Kang | Dir | S - Sale+OE | $11.07 | -993.7K | 1.40M | -41% | -$11.00M |
| DM | 2026-01-20 | 2026-01-16+ | AMPX | Sun Kang | Dir | M - OptEx | $2.40 | +993.7K | 2.35M | +73% | +$2.38M |
| D | 2026-01-14 | 2026-01-12 | AMPX | Sun Kang | Dir | S - Sale+OE | $10.10 | -506.3K | 1.40M | -27% | -$5.11M |
| DM | 2026-01-14 | 2026-01-12 | AMPX | Sun Kang | Dir | M - OptEx | $1.80 | +506.3K | 1.91M | +36% | +$913.3K |
| 2025-12-22 | 2025-12-19 | AMPX | Stepien Thomas M | Pres, Dir | A - Grant | $0.00 | +200.0K | 610.0K | +49% | $0 | |
| D | 2025-12-15 | 2025-12-11 | AMPX | Stefan Constantin Ionel | CTO | M - OptEx | $0.05 | +125.0K | 947.0K | +15% | +$6,250 |
| D | 2025-12-15 | 2025-12-11 | AMPX | Stefan Constantin Ionel | CTO | S - Sale+OE | $10.51 | -198.3K | 748.7K | -21% | -$2.08M |
| 2025-11-25 | 2025-11-21 | AMPX | Stefan Constantin Ionel | CTO | S - Sale | $10.08 | -25.0K | 822.0K | -3% | -$252.2K | |
| 2025-11-25 | 2025-11-21 | AMPX | Sun Kang | CEO, Dir | S - Sale | $10.08 | -68.7K | 1.40M | -5% | -$692.0K | |
| DM | 2025-11-19 | 2025-11-17 | AMPX | Sun Kang | CEO, Dir | M - OptEx | $0.2781 | +1.00M | 2.40M | +71% | +$278.1K |
| D | 2025-11-19 | 2025-11-17 | AMPX | Sun Kang | CEO, Dir | S - Sale+OE | $10.60 | -1.00M | 1.47M | -40% | -$10.60M |
| 2025-10-08 | 2025-10-06 | AMPX | RODRIGUEZ RICARDO C. | CFO | A - Grant | $0.00 | +200.0K | 200.0K | New | $0 | |
| 2025-08-25 | 2025-08-21 | AMPX | Sun Kang | CEO, Dir | S - Sale | $6.82 | -65.7K | 1.47M | -4% | -$447.8K | |
| 2025-08-25 | 2025-08-21 | AMPX | Wallach Sandra | CFO | S - Sale | $6.82 | -28.4K | 1.01M | -3% | -$193.6K | |
| 2025-08-25 | 2025-08-21 | AMPX | Stefan Constantin Ionel | CTO | S - Sale | $6.82 | -19.2K | 847.0K | -2% | -$130.7K | |
| 2025-06-17 | 2025-06-13 | AMPX | Chu Steven | Dir | A - Grant | $0.00 | +44.4K | 189.8K | +31% | $0 | |
| 2025-06-17 | 2025-06-13 | AMPX | DIXON DONALD R | Dir | A - Grant | $0.00 | +44.4K | 394.7K | +13% | $0 | |
| 2025-06-17 | 2025-06-13 | AMPX | HSIEH Wen Hsuan | Dir | A - Grant | $0.00 | +44.4K | 187.3K | +31% | $0 | |
| 2025-06-17 | 2025-06-13 | AMPX | SATTERTHWAITE LIVINGSTON | Dir | A - Grant | $0.00 | +44.4K | 336.1K | +15% | $0 | |
| 2025-06-17 | 2025-06-13 | AMPX | BAYLESS KATHLEEN A | Dir | A - Grant | $0.00 | +44.4K | 205.7K | +28% | $0 | |
| 2025-05-23 | 2025-05-21 | AMPX | Sun Kang | CEO, Dir | S - Sale | $2.43 | -69.8K | 1.81M | -4% | -$169.6K | |
| 2025-05-23 | 2025-05-21 | AMPX | Stefan Constantin Ionel | CTO | S - Sale | $2.43 | -20.4K | 866.1K | -2% | -$49.5K | |
| 2025-05-23 | 2025-05-21 | AMPX | Wallach Sandra | CFO | S - Sale | $2.43 | -27.6K | 1.03M | -3% | -$67.1K | |
| 2025-05-06 | 2025-05-01 | AMPX | Stepien Thomas M | Pres, Dir | A - Grant | $0.00 | +400.0K | 400.0K | New | $0 | |
| 2025-03-21 | 2025-03-19 | AMPX | Wallach Sandra | CFO | A - Grant | $0.00 | +383.3K | 1.06M | +57% | $0 | |
| 2025-03-21 | 2025-03-19 | AMPX | Sun Kang | CEO, Dir | A - Grant | $0.00 | +599.4K | 1.88M | +47% | $0 | |
| 2025-03-21 | 2025-03-19 | AMPX | Stefan Constantin Ionel | CTO | A - Grant | $0.00 | +461.5K | 886.5K | +109% | $0 | |
| D | 2025-03-18 | 2025-03-14 | AMPX | Stefan Constantin Ionel | CTO | M - OptEx | $0.98 | +3,471 | 425.0K | +0.8% | +$3,402 |
| D | 2025-03-12 | 2025-03-10 | AMPX | Bornstein Jonathan | Pres of Amprius Lab | M - OptEx | $0.98 | +3,471 | 422.7K | +0.8% | +$3,402 |
| 2025-02-24 | 2025-02-21 | AMPX | Stefan Constantin Ionel | CTO | S - Sale | $3.13 | -9,066 | 421.5K | -2% | -$28.4K | |
| 2025-02-24 | 2025-02-21 | AMPX | Wallach Sandra | CFO | S - Sale | $3.13 | -18.1K | 678.0K | -3% | -$56.8K | |
| 2025-02-24 | 2025-02-21 | AMPX | Sun Kang | CEO, Dir | S - Sale | $3.13 | -34.4K | 1.28M | -3% | -$107.5K | |
| 2025-02-24 | 2025-02-21 | AMPX | Bornstein Jonathan | Pres of Amprius Lab | S - Sale | $3.13 | -13.5K | 419.2K | -3% | -$42.3K | |
| 2024-11-22 | 2024-11-21 | AMPX | Bornstein Jonathan | Pres of Amprius Lab | S - Sale | $1.96 | -18.2K | 454.1K | -4% | -$35.6K | |
| MI | 2024-11-22 | 2024-11-20+ | AMPX | Bornstein Jonathan | Pres of Amprius Lab | S - Sale | $1.92 | -148.5K | 1.04M | -13% | -$285.8K |
| 2024-11-22 | 2024-11-21 | AMPX | Stefan Constantin Ionel | CTO | S - Sale | $1.96 | -8,575 | 430.6K | -2% | -$16.8K | |
| 2024-11-22 | 2024-11-21 | AMPX | Sun Kang | CEO, Dir | S - Sale | $1.96 | -33.8K | 1.32M | -3% | -$66.2K | |
| 2024-11-22 | 2024-11-21 | AMPX | Wallach Sandra | CFO | S - Sale | $1.96 | -17.2K | 696.1K | -2% | -$33.6K | |
| M | 2024-10-25 | 2024-10-23 | AMPX | Amprius, Inc. | 10% | J - Other | — | -62.70M | 59.70M | -51% | — |
| M | 2024-09-05 | 2024-09-03+ | AMPX | Amprius, Inc. | 10% | S - Sale | $0.9661 | -19.6K | 65.20M | -0.0% | -$18.9K |
| MI | 2024-09-05 | 2024-09-03+ | AMPX | MIRRO JUSTIN E | Dir | S - Sale | $0.9056 | -710.0K | 1.20M | -37% | -$643.0K |
| 2024-08-22 | 2024-08-21 | AMPX | Wallach Sandra | CFO | S - Sale | $1.04 | -17.6K | 713.3K | -2% | -$18.3K | |
| 2024-08-22 | 2024-08-21 | AMPX | Stefan Constantin Ionel | CTO | S - Sale | $1.04 | -8,800 | 386.2K | -2% | -$9,152 | |
| 2024-08-22 | 2024-08-21 | AMPX | Sun Kang | CEO, Dir | S - Sale | $1.04 | -33.3K | 1.35M | -2% | -$34.7K | |
| 2024-08-22 | 2024-08-21 | AMPX | Bornstein Jonathan | Pres of Amprius Lab | S - Sale | $1.04 | -18.6K | 1.53M | -1% | -$19.4K | |
| 2024-08-14 | 2024-08-13 | AMPX | SATTERTHWAITE LIVINGSTON | Dir | A - Grant | $0.00 | +283.0K | 291.6K | +3,283% | $0 | |
| DI | 2024-07-25 | 2024-07-23 | AMPX | MIRRO JUSTIN E | Dir | A - Grant | — | +925.9K | 2.39M | +63% | — |
| MI | 2024-06-14 | 2024-06-12+ | AMPX | MIRRO JUSTIN E | Dir | S - Sale | $1.22 | -800.0K | 1.65M | -33% | -$973.0K |
| 2024-06-07 | 2024-06-07 | AMPX | Gustanski Mary | Dir | A - Grant | $0.00 | +114.6K | 146.4K | +360% | $0 | |
| 2024-06-07 | 2024-06-07 | AMPX | BAYLESS KATHLEEN A | Dir | A - Grant | $0.00 | +125.0K | 161.3K | +345% | $0 | |
| 2024-06-07 | 2024-06-07 | AMPX | Chu Steven | Dir | A - Grant | $0.00 | +125.0K | 145.4K | +613% | $0 | |
| 2024-06-07 | 2024-06-07 | AMPX | DIXON DONALD R | Dir | A - Grant | $0.00 | +125.0K | 142.9K | +699% | $0 | |
| 2024-06-07 | 2024-06-07 | AMPX | HSIEH Wen Hsuan | Dir | A - Grant | $0.00 | +125.0K | 142.9K | +699% | $0 | |
| 2024-06-07 | 2024-06-07 | AMPX | MIRRO JUSTIN E | Dir | A - Grant | $0.00 | +125.0K | 142.9K | +699% | $0 | |
| M | 2024-05-24 | 2024-05-21+ | AMPX | Stefan Constantin Ionel | CTO | S - Sale | $1.34 | -9,393 | 399.1K | -2% | -$12.6K |
| M | 2024-05-24 | 2024-05-21+ | AMPX | Wallach Sandra | CFO | S - Sale | $1.34 | -18.8K | 739.2K | -2% | -$25.2K |
| M | 2024-05-24 | 2024-05-21+ | AMPX | Sun Kang | See Remarks, Dir | S - Sale | $1.34 | -35.6K | 1.40M | -2% | -$47.8K |
| M | 2024-05-24 | 2024-05-21+ | AMPX | Bornstein Jonathan | Pres of Amprius Lab | S - Sale | $1.34 | -19.9K | 1.56M | -1% | -$26.7K |
| D | 2024-04-15 | 2024-04-12 | AMPX | Bornstein Jonathan | Pres of Amprius Lab | M - OptEx | $0.05 | +1.01M | 1.57M | +180% | +$50.4K |
| D | 2024-04-03 | 2024-04-02 | AMPX | Bornstein Jonathan | Pres of Amprius Lab | S - Sale+OE | $2.38 | -126.0K | 558.9K | -18% | -$299.8K |
Purchase Sale Sale after option exercise All abbreviations