$ Value
$19.7M
Shares
1,250,963
Price
$16
Filed
Apr 2
Insider
Name
Sun Kang
Title
—
CIK
0001476220
Roles
Transaction Details
Transaction Date
2026-04-01
Code
S
Table
Non-Derivative
Ownership
Direct
Equity Swap
No
Shares After
1,591,437
Footnotes
The transactions reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on August 18, 2025. | Includes 1,159,385 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. | The price reported in Column 4 is an average execution price. These shares were sold in multiple transactions at prices ranging from $15.37 to $16.36, 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. | The price reported in Column 4 is an average execution price. These shares were sold in multiple transactions at prices ranging from $16.37 to $17.31, 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. | These securities are held directly by the KANG & CECILLIA SUN FAMILY REVOCABLE TRUST, for which the reporting person and his spouse are co-trustees.
Filing Info
Sun Kang's History
| Date | Ticker | Type | Value |
|---|---|---|---|
| 2026-04-01 | AMPX | M | $2.3M |
| 2026-04-01 | AMPX | M | $690K |
| 2026-04-01 | AMPX | ▼ | $19.7M |
| 2026-04-01 | AMPX | ▼ | $4.2M |
| 2026-04-01 | AMPX | M | $2.3M |
| 2026-04-01 | AMPX | M | $690K |
| 2026-03-23 | AMPX | ▼ | $2.9M |
| 2026-03-23 | AMPX | ▼ | $1.2M |
| 2026-02-23 | AMPX | ▼ | $622K |
| 2026-01-20 | AMPX | M | $77K |
Other Insiders at AMPX (90d)
| Insider | Bought | Sold | Last |
|---|---|---|---|
| Sun Kang | — | $8.9M | 2026-04-01 |
|
Stefan Constantin Ionel
Chief Technology Officer
|
— | $734K | 2026-02-23 |