Ker Zhang
CIK 1266870 · View on SEC EDGAR ↗
Insider
First SEC filing: June 10, 2026 · Latest: June 10, 2026
On this page
Insider at
Insider transactions
0 buys (P)
0 sells (S)
Net:
$0
+ 1 non-open-market transaction below
last 12 months, based on the transactions shown below
Price change vs current quote, split-adjusted for corporate actions since the filing — not benchmarked, not annualized, not size-weighted
No open-market trades on record; showing all filings.
| Date | Ticker | Code | Shares | Price | Value | Owned after | Δ own | A/D | vs now |
|---|---|---|---|---|---|---|---|---|---|
| June 8, 2026 | AMBQ | A | 4,957 | — | — | 28,766 Direct | +20.82% | Acquired | (price as of 2026-08-20) |
P = Open-market purchase · S = Sale · A = Grant/award · M = Option exercise · G = Gift · F = Tax withholding
Insider transactions are not a recommendation; sales are often driven by liquidity or tax reasons.
Initial ownership (Form 3) 4 holdings
Securities held when first becoming an insider, per SEC Form 3.
| Date | Ticker | Security | Shares | Ownership |
|---|---|---|---|---|
| July 29, 2025 | AMBQ | Stock Option (Right to Buy)→ Common Stock (1,785) | 1,785 | Direct |
| July 29, 2025 | AMBQ | Stock Option (Right to Buy)→ Common Stock (8,928) | 8,928 | Direct |
| July 29, 2025 | AMBQ | Stock Option (Right to Buy)→ Common Stock (3,571) | 3,571 | Direct |
| July 29, 2025 | AMBQ | Stock Option (Right to Buy)→ Common Stock (17,857) | 17,857 | Direct |