AMPX Amprius Technologies, Inc.
Amprius Technologies, Inc. (AMPX) Insider Activity
What the officers, directors and large holders did with their own shares. Only open-market purchases and sales count toward the totals — grants, option exercises and shares withheld for tax are compensation mechanics, not decisions, and they're listed separately below.
How much of that selling was preplanned? 0% planned / 100% discretionary
Largest single sale: $19.7M.
Where they traded
No open-market insider purchase on record.
Recent open-market activity
| Date | Insider | Role | Action | Shares | Price | Value | Held after |
|---|---|---|---|---|---|---|---|
| Stepien Thomas M | Chief Executive Officer | Sell | 8,000 | $10.03 | $80.2K | 594,096 −1.3% of holding | |
| Sun Kang | Director | Sell | 62,101 | $10.34 | $642.2K | 1,218,397 −4.8% of holding | |
| Stefan Constantin Ionel | Chief Technology Officer | Sell | 29,681 | $10.34 | $306.9K | 771,629 −3.7% of holding | |
| Stepien Thomas M | Chief Executive Officer | Sell | 23,529 | $10.34 | $243.3K | 602,096 −3.8% of holding | |
| DIXON DONALD R | Director | Sell | 85,000 | $17.17 | $1.5M | 359,380 −19.1% of holding | |
| DIXON DONALD R | Director | Sell | 40,000 | $19.13 | $765.2K | 444,380 −8.3% of holding | |
| Stepien Thomas M | Chief Executive Officer | Sell | 2,000 | $20.97 | $41.9K | 625,625 −0.3% of holding | |
| Stepien Thomas M | Chief Executive Officer | Sell | 4,375 | $17.19 | $75.2K | 694,923 −0.6% of holding | |
| Stefan Constantin Ionel | Chief Technology Officer | Sell | 3,208 | $17.19 | $55.2K | 801,310 −0.4% of holding | |
| Sun Kang | Director | Sell | 356 | $17.19 | $6.1K | 1,280,498 −0% of holding | |
| DIXON DONALD R | Director | Sell | 17,895 | $17.90 | $320.3K | 484,380 −3.6% of holding | |
| Sun Kang | Director | Sell | 67,796 | $14.79 | $1.0M | 1,280,854 −5% of holding | |
| Stepien Thomas M | Chief Executive Officer | Sell | 60,702 | $14.79 | $897.7K | 699,298 −8% of holding | |
| Stefan Constantin Ionel | Chief Technology Officer | Sell | 28,812 | $14.79 | $426.1K | 804,518 −3.5% of holding | |
| Sun Kang 2 fills | Director | Sell | 1,500,000 | $15.91 | $23.9M | 1,591,437 −48.5% of holding | |
| Sun Kang 2 fills | Director | Sell | 217,869 | $18.80 | $4.1M | 121,452 −64.2% of holding |
Form 4s are due within two business days of a transaction, so this is close to real time — unlike the quarterly 13F data on the Institutional tab. A single large sale often reflects a prearranged 10b5-1 plan rather than a fresh view, so read a pattern of sales rather than any one of them.