Kang Sun
CIK 1476220 · Chief Executive Officer · last filed 2026-05-28
"Disclosed insider exposure" sums this person's most-recently-reported share counts across each company they're an insider in, multiplied by the current underlying price. It is not net worth — it misses retail holdings, private investments, real estate, index funds, and any company where the person isn't an SEC-reporting insider. For informational purposes only.
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Disclosed Exposure
$9.49M
Companies
2
Total Filings
23
Lifetime Open-Market Net
-$57.85M
Holdings By Company
Latest on-record share count from this person's most recent non-derivative Form 4 transaction in each company. Disclosed exposure = shares × current underlying price.
| Symbol | Role | Shares | Price | Disclosed Exposure | Lifetime OM Net | Filings | Latest Filed |
|---|---|---|---|---|---|---|---|
| AMPX.WS | Director | 1,336,904 | $7.10 | $9.49M | -$57.85M | 19 | 2026-05-28 |
| DAYSTAR TECHNOLOGIES INC (DSTI) Delisted | Director | 86,112 | — | — | $0 | 3 | 2012-03-29 |
Recent Filings · Page 2 of 3
23 filingsForm 4 transactions across all companies, newest first.
| Filed | Symbol | Action | Net Shares | Net $ | Link |
|---|---|---|---|---|---|
| 2025-08-25 | AMPX.WS | Sell (S) | −65,654 | -$447.5K | EDGAR |
| 2025-05-23 | AMPX.WS | Sell (S) | −69,786 | -$169.7K | EDGAR |
| 2025-03-21 | AMPX.WS | Grant (A) | +599,400 | $0 | EDGAR |
| 2025-02-24 | AMPX.WS | Sell (S) | −34,353 | -$107.6K | EDGAR |
| 2024-11-22 | AMPX.WS | Sell (S) | −33,779 | -$66.4K | EDGAR |
| 2024-10-25 | AMPX.WS | Grant (A) | — | $0 | EDGAR |
| 2024-08-22 | AMPX.WS | Sell (S) | −33,333 | -$34.7K | EDGAR |
| 2024-05-24 | AMPX.WS | Sell (S) | −35,584 | -$47.7K | EDGAR |
| 2024-03-19 | AMPX.WS | Grant (A) | +1,419,670 | $0 | EDGAR |
| 2022-09-16 | — | Grant (A) | — | $0 |
Codes: P = open-market purchase · S = open-market sale · A = grant/award · M = option exercise · F = tax withholding at vest · G = bona-fide gift · D = disposition to issuer · J = other (see filing footnote). Only P / S codes carry directional signal.