Chen Sean Chihhsiang
CIK 2078559 · President and COO · last filed 2026-05-18
Chen Sean Chihhsiang is a President and COO who has filed 4 SEC Form 4 insider transactions across 1 company since 2025. The most recent filing, for AMBQ, was dated May 18, 2026. Across all open-market trades the lifetime net is −$3.9M, making them a net seller over the disclosed history. Current disclosed insider exposure totals $13.4M across reported positions.
"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.
$13.38M
1
4
-$3.95M
Holdings By Company
| Symbol | Role | Shares | Price | Disclosed Exposure | Lifetime OM Net | Filings | Latest Filed |
|---|---|---|---|---|---|---|---|
| AMBQ | President and COO | 175,960 | $76.04 | $13.38M | -$3.95M | 4 | 2026-05-18 |
Recent Filings
4 filings| Filed | Symbol | Action | Net Shares | Net $ | Link |
|---|---|---|---|---|---|
| 2026-05-18 | AMBQ | Mixed | — | -$3.62M | EDGAR |
| 2026-04-02 | AMBQ | Grant (A) | +64,246 | $0 | EDGAR |
| 2026-03-10 | AMBQ | Grant (A) | +64,246 | $0 | EDGAR |
| 2025-10-06 | AMBQ | Grant (A) | +56,029 | $0 | EDGAR |