Timothy Chen
Insider
First SEC filing: May 29, 2026 · Latest: June 10, 2026
Insider at
Insider transactions
0 buys (P)
4 sells (S)
Net: $-5,632,525
Price change vs current quote, split-adjusted for corporate actions since the filing — not benchmarked, not annualized, not size-weighted
| Date | Ticker | Code | Shares | Price | Value | Owned after | Δ own | A/D | vs now |
|---|---|---|---|---|---|---|---|---|---|
| June 8, 2026 | AMBQ | A | 4,957 | · | · | 52,575 Direct | +10.41% | Acquired | (price as of 2026-10-02) |
| May 27, 2026 | AMBQ | S | 22,414 | $78.85 | $1,767,344 | 48,178 Indirect | -31.75% | Disposed | -13.5% (price as of 2026-10-02) |
| May 27, 2026 | AMBQ | S | 24,248 | $79.72 | $1,933,051 | 23,930 Indirect | -50.33% | Disposed | -14.5% (price as of 2026-10-02) |
| May 27, 2026 | AMBQ | S | 20,666 | $80.61 | $1,665,886 | 3,264 Indirect | -86.36% | Disposed | -15.4% (price as of 2026-10-02) |
| May 27, 2026 | AMBQ | S | 3,264 | $81.57 | $266,244 | 0 Indirect | -100.00% | Disposed | -16.4% (price as of 2026-10-02) |
| July 31, 2025 | AMBQ | C | 70,592 | · | · | 70,592 Indirect | · | Acquired | (price as of 2026-10-02) |
| July 31, 2025 | AMBQ | C | 1,707,853 | · | · | 0 Indirect | -100.00% | Disposed | (price as of 2026-10-02) |
| July 29, 2025 | AMBQ | A | 47,618 | · | · | 47,618 Direct | · | Acquired | (price as of 2026-10-02) |
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.
Derivative holdings (Form 4 Table II) Options, RSUs and convertible securities reported on Form 4 Table II.
| Date | Ticker | Security | Underlying | Exercise price | Expiration | Shares | A/D |
|---|---|---|---|---|---|---|---|
| July 31, 2025 | AMBQ | Series F-1 Convertible Preferred Stock | Common Stock | · | · | 1,707,853 | Disposed |
Exercise/conversion price is blank when not applicable (e.g. RSUs).
Initial ownership (Form 3) 1 holding
Securities held when first becoming an insider, per SEC Form 3.
| Date | Ticker | Security | Shares | Ownership |
|---|---|---|---|---|
| May 29, 2026 | AMBQ | Series F-1 Convertible Preferred Stock | 70,592 | Indirect |