As of the latest Form 4 filed Jun 10, 2026.
What Ambiq Micro, Inc. insiders — officers, directors and 10% owners — have bought and sold in their own stock, straight from their SEC Form 4 filings. Values are shares × the reported transaction price where both are disclosed.
Buys plotted up, sells down; bar height is the disclosed dollar value (shares × reported price). Our Form 4 history is only complete from mid-2026, so early months are sparse — the series fills in as more filings land. Open-market purchases and sales only.
Newest filing first — the 33 most recent filings for AMBQ.
| Filed | Trade date | Insider | Transaction | Shares | Price | Value | 10b5-1 | Filing |
|---|---|---|---|---|---|---|---|---|
| 2026-06-10 | 2026-06-08 | Banks Bernard Bennett Director | AAward | +4.96K | $0.00 | $0.00 | No | Form 4 ↗ |
| 2026-06-10 | 2026-06-08 | HSIEH Wen Hsuan Director | AAward | +4.96K | $0.00 | $0.00 | No | Form 4 ↗ |
| 2026-06-10 | 2026-06-08 | Chen Timothy Director | AAward | +4.96K | $0.00 | $0.00 | No | Form 4 ↗ |
| 2026-06-10 | 2026-06-08 | TAUTGES JOSEPH A Director | AAward | +4.96K | $0.00 | $0.00 | No | Form 4 ↗ |
| 2026-06-10 | 2026-06-08 | ZHANG KER Director | AAward | +4.96K | $0.00 | $0.00 | No | Form 4 ↗ |
| 2026-06-04 | 2026-06-02 | Winzeler Jeffrey G Chief Financial Officer | MExercise | +5.95K | $16.80 | $100.0K | No | Form 4 ↗ |
| 2026-05-29 | 2026-05-27 | Chen Timothy Director | SSale | −3.26K | $81.57 | $266K | No | Form 4 ↗ |
| 2026-05-29 | 2026-05-27 | Chen Timothy, Director | SSale | −20.7K | $80.61 | $1.67M | No | Form 4 ↗ |
| 2026-05-29 | 2026-05-27 | Chen Timothy, Director | SSale | −24.2K | $79.72 | $1.93M | No | Form 4 ↗ |
| 2026-05-29 | 2026-05-27 | Chen Timothy, Director | SSale | −22.4K | $78.85 | $1.77M | No | Form 4 ↗ |
| 2026-05-18 | 2026-05-15 | Chen Sean Chihhsiang President and COO | SSale | −23.3K | $71.37 | $1.67M | No | Form 4 ↗ |
| 2026-05-18 | 2026-05-15 | Chen Sean Chihhsiang, President and COO | SSale | −32.4K | $70.53 | $2.28M | No | Form 4 ↗ |
| 2026-05-18 | 2026-05-15 | Chen Sean Chihhsiang, President and COO | MExercise | +55.7K | $5.88 | $327K | No | Form 4 ↗ |
| 2026-05-18 | 2026-05-15 | Esaka Fumihide Chief Executive Officer | MExercise | +14.5K | $12.60 | $183K | No | Form 4 ↗ |
| 2026-05-18 | 2026-05-15 | Esaka Fumihide, Chief Executive Officer | MExercise | +45.5K | $8.12 | $369K | No | Form 4 ↗ |
| 2026-05-18 | 2026-05-15 | Hanson Scott McLean Chief Technology Officer | MExercise | +8.10K | $8.12 | $65.8K | No | Form 4 ↗ |
| 2026-05-18 | 2026-05-15 | Winzeler Jeffrey G Chief Financial Officer | MExercise | +5.95K | $16.80 | $100.0K | No | Form 4 ↗ |
| 2026-05-18 | 2026-05-14 | Esaka Fumihide Chief Executive Officer | SSale | −60.0K | $70.02 | $4.20M | No | Form 4 ↗ |
| 2026-05-18 | 2026-05-14 | Esaka Fumihide, Chief Executive Officer | MExercise | +60.0K | $8.12 | $487K | No | Form 4 ↗ |
| 2026-05-18 | 2026-05-14 | Hanson Scott McLean Chief Technology Officer | SSale | −200.00 | $70.50 | $14.1K | No | Form 4 ↗ |
| 2026-05-18 | 2026-05-14 | Hanson Scott McLean, Chief Technology Officer | SSale | −6.10K | $69.59 | $425K | No | Form 4 ↗ |
| 2026-05-18 | 2026-05-14 | Hanson Scott McLean, Chief Technology Officer | SSale | −3.90K | $68.62 | $268K | No | Form 4 ↗ |
| 2026-05-18 | 2026-05-14 | Hanson Scott McLean, Chief Technology Officer | MExercise | +10.2K | $8.12 | $82.8K | No | Form 4 ↗ |
| 2026-05-18 | 2026-05-14 | Winzeler Jeffrey G Chief Financial Officer | SSale | −82.00 | $70.65 | $5.79K | No | Form 4 ↗ |
| 2026-05-18 | 2026-05-14 | Winzeler Jeffrey G, Chief Financial Officer | SSale | −25.9K | $69.90 | $1.81M | No | Form 4 ↗ |
| 2026-05-18 | 2026-05-14 | Winzeler Jeffrey G, Chief Financial Officer | MExercise | +26.0K | $16.80 | $437K | No | Form 4 ↗ |
| 2026-04-06 | 2026-04-02 | Connors Michele Kim General Counsel | SSale | −151.00 | $26.65 | $4.02K | No | Form 4 ↗ |
| 2026-04-06 | 2026-04-02 | Connors Michele Kim, General Counsel | SSale | −660.00 | $26.04 | $17.2K | No | Form 4 ↗ |
| 2026-03-10 | 2026-03-06 | Connors Michele Kim General Counsel | AAward | +32.1K | $0.00 | $0.00 | No | Form 4 ↗ |
| 2026-03-10 | 2026-03-06 | Chen Sean Chihhsiang President and COO | AAward | +64.2K | $0.00 | $0.00 | No | Form 4 ↗ |
| 2026-03-10 | 2026-03-06 | Esaka Fumihide Chief Executive Officer | AAward | +161K | $0.00 | $0.00 | No | Form 4 ↗ |
| 2026-03-10 | 2026-03-06 | Hanson Scott McLean Chief Technology Officer | AAward | +80.3K | $0.00 | $0.00 | No | Form 4 ↗ |
| 2026-03-10 | 2026-03-06 | Winzeler Jeffrey G Chief Financial Officer | AAward | +41.7K | $0.00 | $0.00 | No | Form 4 ↗ |
Insiders — a company’s officers, directors and holders of more than 10% of its stock — must report any trade in that stock to the SEC on a Form 4 within two business days. Each row here is one transaction from those filings.
The transaction code tells you what happened: Purchase (P) and Sale (S) are open-market trades — the ones markets watch most; Award (A) is a granted stock or unit, Option exercise (M) converts options into shares, and Gift (G) is a transfer for no consideration. Awards, exercises and gifts are largely compensation or administrative, not a directional bet.
One caveat on sales: many are made under a Rule 10b5-1 plan scheduled months in advance, so a sale is not automatically a bearish signal. Insider activity is a noisy input — read it alongside the filings, not on its own.
See also AMBQ’s full analysis or the market-wide insider trading feed. The tabs above jump to AMBQ’s other SEC data.
Source: SEC Form 4 filings for AMBQ, parsed from EDGAR. Transaction prices are as reported in the filing — SEC public-domain data, not market quotes. Values are shares × reported price where both are disclosed; grants and gifts often carry no price. A delayed record of what insiders reported, not a live position or a recommendation.
Research and education only — not financial advice. TENKis not a registered investment adviser or broker-dealer and gives no personalized advice. Every call is impersonal — identical for all users, generated on a schedule from SEC filings plus a delayed/third-party price feed — may be wrong or out of date, and is not a recommendation to buy or sell any security. The operator and an affiliated trading operation may hold or trade the securities TENK rates; see Disclosures. Past performance does not guarantee future results. Do your own research.