$ Value
$131K
Shares
19,159
Price
$7
Filed
Aug 25
Insider
Name
Stefan Constantin Ionel
Title
Chief Technology Officer
CIK
0001940928
Roles
Transaction Details
Transaction Date
2025-08-21
Code
S
Table
Non-Derivative
Ownership
Direct
Equity Swap
No
Shares After
846,975
Footnotes
This transaction was effected pursuant to non-discretionary, sell-to-cover arrangements mandated by the issuer to fund tax withholding obligations in connection with the vesting of restricted stock units. | The price reported in Column 4 is an average execution price. These shares were sold in multiple transactions at prices ranging from $6.78 to $6.91, inclusive. The reporting person undertakes to provide to the issuer, any security holder of the issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth above. | Includes 637,953 restricted stock units, each of which represents a contingent right to receive one share of the issuer's common stock, subject to the applicable vesting schedule and conditions of each restricted stock unit.
Filing Info
Stefan Constantin Ionel's History
| Date | Ticker | Type | Value |
|---|---|---|---|
| 2026-03-04 | AMPX | A | $0 |
| 2026-02-23 | AMPX | ▼ | $258K |
| 2026-01-28 | AMPX | M | $56 |
| 2026-01-28 | AMPX | M | $2K |
| 2026-01-28 | AMPX | ▼ | $476K |
| 2026-01-28 | AMPX | M | $0 |
| 2026-01-28 | AMPX | M | $0 |
| 2026-01-23 | AMPX | M | $80 |
| 2026-01-23 | AMPX | ▼ | $19K |
| 2026-01-23 | AMPX | M | $0 |
Other Insiders at AMPX (90d)
| Insider | Bought | Sold | Last |
|---|---|---|---|
| Sun Kang | — | $28.6M | 2026-04-01 |
|
RODRIGUEZ RICARDO C.
Chief Financial Officer
|
— | — | 2026-03-04 |
|
Stefan Constantin Ionel
Chief Technology Officer
|
— | $734K | 2026-03-04 |
|
Stepien Thomas M
Chief Executive Officer
|
— | — | 2026-03-04 |