Insider · CIK 0001476220
Kang Sun
ceoofficerdirector
Files at AMPX (Amprius Technologies, Inc.). First filing Nov 22, 2024, latest May 28, 2026.
Track record
Not enough history
Fewer than three past buys with six months of prices.
Median 6-month excess
-
after past buys, n = 0
Hit rate
-
past buys that beat the index over 6 months
Open-market trades
0 / 13
$0 bought, $58M sold
Where the trades landed
Last year at the company this insider has traded most, with each buy and sell on the bar it happened.
AMPX: Amprius Technologies, Inc.
AMPXOct 9, 2026 · close 9.44
Daily candles, adjusted for splits and dividends. Green arrows are insider buys, red are sells, sized by value. Click a marked bar to open the signal.Charts by TradingView Lightweight Charts™
Signals
This insider’s open-market buys and sells, scored.
| Score | Company | Value | Holdings | Price context | Filed |
|---|---|---|---|---|---|
| 30Weak | Amprius Technologies, Inc. | $6,121 356 shares | -0% | +552% from low-24% from high | |
| 55Moderate | Amprius Technologies, Inc. | $1.0M 67,796 shares | -5% | +532% from low-33% from high | |
| 25Weak | Amprius Technologies, Inc. | $24M 1,500,000 shares | -53% | +650% from low-20% from high | |
| 55Moderate | Amprius Technologies, Inc. | $4.1M 217,869 shares | -79% | +802% from low-4% from high | |
| 43Moderate | Amprius Technologies, Inc. | $622k 61,251 shares | -4% | +473% from low-31% from high | |
| 23Weak | Amprius Technologies, Inc. | $11M 993,733 shares | -42% | +518% from low-25% from high | |
| 23Weak | Amprius Technologies, Inc. | $5.1M 506,267 shares | -27% | +462% from low-31% from high | |
| 54Moderate | Amprius Technologies, Inc. | $692k 68,655 shares | -5% | +509% from low-31% from high | |
| 33Weak | Amprius Technologies, Inc. | $11M 1,000,000 shares | -40% | +528% from low-29% from high | |
| 57Moderate | Amprius Technologies, Inc. | $448k 65,654 shares | -4% | +738% from low-22% from high | |
| 51Moderate | Amprius Technologies, Inc. | $170k 69,786 shares | -4% | +199% from low-37% from high | |
| 50Moderate | Amprius Technologies, Inc. | $108k 34,353 shares | -3% | +270% from low-22% from high | |
| 48Moderate | Amprius Technologies, Inc. | $66k 33,779 shares | -3% | - |
Planned sales
Form 144 notices this insider filed before selling restricted or control stock, newest first.
| Filed | Company | Shares | Value | Sale date | Past 3 months |
|---|---|---|---|---|---|
| Nov 21, 2024 | AMPX Amprius Technologies, Inc. | 33,779 0.03% of outstanding | $67k | Nov 21, 2024 | none |
Transactions
Every row this insider has filed, newest first.
| Date | Company | Transaction | Shares | Price | Value | Holdings after | Filed |
|---|---|---|---|---|---|---|---|
| May 27, 2026 | AMPX Amprius Technologies, Inc. | SOpen-market sale Common stock | -356 | $17.19 | $6,121 | 1,280,498 | May 28, 2026 |
| May 21, 2026 | AMPX Amprius Technologies, Inc. | SOpen-market sale Common stock | -67,796 | $14.79 | $1.0M | 1,280,854 | May 26, 2026 |
| May 5, 2026 | AMPX Amprius Technologies, Inc. | AGrant or award Common stock | +6,250 | $0.00 | $0 | 1,348,650 | May 7, 2026 |
| Apr 1, 2026 | AMPX Amprius Technologies, Inc. | MOption exercise Common stock10b5-1 | +1,312,505 | $1.78 | $2.3M | 2,654,905 | Apr 2, 2026 |
| Apr 1, 2026 | AMPX Amprius Technologies, Inc. | MOption exercise Common stock10b5-1 | +187,495 | $3.68 | $690k | 2,842,400 | Apr 2, 2026 |
| Apr 1, 2026 | AMPX Amprius Technologies, Inc. | SOpen-market sale Common stock10b5-1 | -1,250,963 | $15.73 | $20M | 1,591,437 | Apr 2, 2026 |
| Apr 1, 2026 | AMPX Amprius Technologies, Inc. | SOpen-market sale Common stock10b5-1 | -249,037 | $16.78 | $4.2M | 1,342,400 | Apr 2, 2026 |
| Apr 1, 2026 | AMPX Amprius Technologies, Inc. | MOption exercise Stock Option (right to buy)derivative10b5-1 | -1,312,505 | $1.78 | $2.3M | 0 | Apr 2, 2026 |
| Apr 1, 2026 | AMPX Amprius Technologies, Inc. | MOption exercise Stock Option (right to buy)derivative10b5-1 | -187,495 | $3.68 | $690k | 1,787,007 | Apr 2, 2026 |
| Mar 23, 2026 | AMPX Amprius Technologies, Inc. | SOpen-market sale Common stockindirect: See Footnote10b5-1 | -152,823 | $18.69 | $2.9M | 121,452 | Mar 24, 2026 |
| Mar 23, 2026 | AMPX Amprius Technologies, Inc. | SOpen-market sale Common stockindirect: See Footnote10b5-1 | -65,046 | $19.06 | $1.2M | 56,406 | Mar 24, 2026 |
| Feb 23, 2026 | AMPX Amprius Technologies, Inc. | SOpen-market sale Common stock | -61,251 | $10.16 | $622k | 1,342,400 | Feb 24, 2026 |
| Jan 16, 2026 | AMPX Amprius Technologies, Inc. | MOption exercise Common stock10b5-1 | +850,338 | $2.50 | $2.1M | 2,253,989 | Jan 20, 2026 |
| Jan 16, 2026 | AMPX Amprius Technologies, Inc. | MOption exercise Common stock10b5-1 | +100,210 | $1.78 | $178k | 2,354,199 | Jan 20, 2026 |
| Jan 16, 2026 | AMPX Amprius Technologies, Inc. | SOpen-market sale Common stock10b5-1 | -950,548 | $11.07 | $11M | 1,403,651 | Jan 20, 2026 |
| Jan 20, 2026 | AMPX Amprius Technologies, Inc. | MOption exercise Common stock10b5-1 | +43,185 | $1.78 | $77k | 1,446,836 | Jan 20, 2026 |
| Jan 20, 2026 | AMPX Amprius Technologies, Inc. | SOpen-market sale Common stock10b5-1 | -43,185 | $11.03 | $476k | 1,403,651 | Jan 20, 2026 |
| Jan 16, 2026 | AMPX Amprius Technologies, Inc. | MOption exercise Stock Option (right to buy)derivative10b5-1 | -850,338 | $0.00 | $0 | 0 | Jan 20, 2026 |
| Jan 16, 2026 | AMPX Amprius Technologies, Inc. | MOption exercise Stock Option (right to buy)derivative10b5-1 | -100,210 | $0.00 | $0 | 1,355,690 | Jan 20, 2026 |
| Jan 20, 2026 | AMPX Amprius Technologies, Inc. | MOption exercise Stock Option (right to buy)derivative10b5-1 | -43,185 | $0.00 | $0 | 1,312,505 | Jan 20, 2026 |
| Jan 12, 2026 | AMPX Amprius Technologies, Inc. | MOption exercise Common stock10b5-1 | +180,802 | $0.62 | $112k | 1,584,453 | Jan 14, 2026 |
| Jan 12, 2026 | AMPX Amprius Technologies, Inc. | MOption exercise Common stock10b5-1 | +208,264 | $2.44 | $508k | 1,792,717 | Jan 14, 2026 |
| Jan 12, 2026 | AMPX Amprius Technologies, Inc. | MOption exercise Common stock10b5-1 | +117,201 | $2.50 | $293k | 1,909,918 | Jan 14, 2026 |
| Jan 12, 2026 | AMPX Amprius Technologies, Inc. | SOpen-market sale Common stock10b5-1 | -506,267 | $10.10 | $5.1M | 1,403,651 | Jan 14, 2026 |
| Jan 12, 2026 | AMPX Amprius Technologies, Inc. | MOption exercise Stock Option (right to buy)derivative10b5-1 | -180,802 | $0.00 | $0 | 0 | Jan 14, 2026 |
| Jan 12, 2026 | AMPX Amprius Technologies, Inc. | MOption exercise Stock Option (right to buy)derivative10b5-1 | -208,264 | $0.00 | $0 | 0 | Jan 14, 2026 |
| Jan 12, 2026 | AMPX Amprius Technologies, Inc. | MOption exercise Stock Option (right to buy)derivative10b5-1 | -117,201 | $0.00 | $0 | 850,338 | Jan 14, 2026 |
| Nov 21, 2025 | AMPX Amprius Technologies, Inc. | SOpen-market sale Common stock | -68,655 | $10.08 | $692k | 1,403,651 | Nov 25, 2025 |
| Nov 17, 2025 | AMPX Amprius Technologies, Inc. | MOption exercise Common stock10b5-1 | +202,934 | $0.98 | $199k | 1,675,240 | Nov 19, 2025 |
| Nov 17, 2025 | AMPX Amprius Technologies, Inc. | MOption exercise Common stock10b5-1 | +727,950 | $0.05 | $36k | 2,403,190 | Nov 19, 2025 |
| Nov 17, 2025 | AMPX Amprius Technologies, Inc. | MOption exercise Common stock10b5-1 | +27,463 | $0.62 | $17k | 2,430,653 | Nov 19, 2025 |
| Nov 17, 2025 | AMPX Amprius Technologies, Inc. | MOption exercise Common stock10b5-1 | +41,653 | $0.62 | $26k | 2,472,306 | Nov 19, 2025 |
| Nov 17, 2025 | AMPX Amprius Technologies, Inc. | SOpen-market sale Common stock10b5-1 | -1,000,000 | $10.60 | $11M | 1,472,306 | Nov 19, 2025 |
| Nov 17, 2025 | AMPX Amprius Technologies, Inc. | MOption exercise Stock Option (right to buy)derivative10b5-1 | -202,934 | $0.00 | $0 | 0 | Nov 19, 2025 |
| Nov 17, 2025 | AMPX Amprius Technologies, Inc. | MOption exercise Stock Option (right to buy)derivative10b5-1 | -727,950 | $0.00 | $0 | 0 | Nov 19, 2025 |
| Nov 17, 2025 | AMPX Amprius Technologies, Inc. | MOption exercise Stock Option (right to buy)derivative10b5-1 | -27,463 | $0.00 | $0 | 180,802 | Nov 19, 2025 |
| Nov 17, 2025 | AMPX Amprius Technologies, Inc. | MOption exercise Stock Option (right to buy)derivative10b5-1 | -41,653 | $0.00 | $0 | 0 | Nov 19, 2025 |
| Aug 21, 2025 | AMPX Amprius Technologies, Inc. | SOpen-market sale Common stock | -65,654 | $6.82 | $448k | 1,472,306 | Aug 25, 2025 |
| May 21, 2025 | AMPX Amprius Technologies, Inc. | SOpen-market sale Common stock | -69,786 | $2.43 | $170k | 1,812,235 | May 23, 2025 |
| Mar 19, 2025 | AMPX Amprius Technologies, Inc. | AGrant or award Common stock | +599,400 | $0.00 | $0 | 1,882,021 | Mar 21, 2025 |
| Feb 21, 2025 | AMPX Amprius Technologies, Inc. | SOpen-market sale Common stock | -34,353 | $3.13 | $108k | 1,282,621 | Feb 24, 2025 |
| Nov 21, 2024 | AMPX Amprius Technologies, Inc. | SOpen-market sale Common stock | -33,779 | $1.96 | $66k | 1,316,974 | Nov 22, 2024 |
| Oct 23, 2024 | AMPX Amprius Technologies, Inc. | AGrant or award Stock Option (right to buy)derivative | +208,265 | - | - | 208,265 | Oct 25, 2024 |
| Oct 23, 2024 | AMPX Amprius Technologies, Inc. | AGrant or award Stock Option (right to buy)derivative | +208,264 | - | - | 208,264 | Oct 25, 2024 |
| Oct 23, 2024 | AMPX Amprius Technologies, Inc. | AGrant or award Stock Option (right to buy)derivative | +41,653 | - | - | 41,653 | Oct 25, 2024 |
| Oct 23, 2024 | AMPX Amprius Technologies, Inc. | AGrant or award Stock Option (right to buy)derivative | +202,934 | - | - | 202,934 | Oct 25, 2024 |
| Oct 23, 2024 | AMPX Amprius Technologies, Inc. | AGrant or award Stock Option (right to buy)derivative | +1,171,476 | - | - | 1,171,476 | Oct 25, 2024 |
| Oct 23, 2024 | AMPX Amprius Technologies, Inc. | AGrant or award Stock Option (right to buy)derivative | +1,974,502 | - | - | 1,974,502 | Oct 25, 2024 |
| Oct 23, 2024 | AMPX Amprius Technologies, Inc. | AGrant or award Stock Option (right to buy)derivative | +967,539 | - | - | 967,539 | Oct 25, 2024 |
Not investment advice. Scores and forward returns are decision support built from public SEC filings and past prices; they describe what happened after comparable filings, not what will happen after this one. Do your own research and size your risk.