Ambiq Micro, Inc. (AMBQ) Insider Trading
Directors, officers and holders of more than 10% of AMBQ report their trades in its stock on SEC Form 4, within two business days. Each row below is one Form 4 transaction line. The one-letter code says what kind of transaction it was: only P (purchase) and S (sale) are open-market or private trades; awards, option exercises, tax withholding and gifts carry other codes.
Recent Form 4 transactions
The 50 most recent of 171 transactions on file: 0 with code P, 38 with code S and 12 with other codes.
| Date | Insider | Title | Code | Shares | Price | Value |
|---|---|---|---|---|---|---|
| Oct 15, 2026 | Esaka Fumihide | Chief Executive Officer | S Sale | 2,800 | $51.15 | $143,214 |
| Oct 15, 2026 | Hanson Scott McLean | Chief Technology Officer | M Exercise | 7,000 | $8.12 | $56,840 |
| Oct 15, 2026 | Hanson Scott McLean | Chief Technology Officer | S Sale | 1,800 | $51.86 | $93,351 |
| Oct 15, 2026 | Hanson Scott McLean | Chief Technology Officer | S Sale | 3,700 | $51.12 | $189,148 |
| Oct 15, 2026 | Hanson Scott McLean | Chief Technology Officer | S Sale | 900 | $50.08 | $45,074 |
| Oct 15, 2026 | Hanson Scott McLean | Chief Technology Officer | M Exercise | 7,000 | Not measured | Not measured |
| Oct 15, 2026 | Esaka Fumihide | Chief Executive Officer | S Sale | 500 | $50.02 | $25,011 |
| Oct 15, 2026 | Esaka Fumihide | Chief Executive Officer | M Exercise | 5,000 | $8.12 | $40,600 |
| Oct 15, 2026 | Hanson Scott McLean | Chief Technology Officer | S Sale | 600 | $49.06 | $29,436 |
| Oct 15, 2026 | Esaka Fumihide | Chief Executive Officer | S Sale | 500 | $49.13 | $24,567 |
| Oct 15, 2026 | Esaka Fumihide | Chief Executive Officer | S Sale | 1,200 | $51.85 | $62,226 |
| Oct 15, 2026 | Esaka Fumihide | Chief Executive Officer | M Exercise | 5,000 | Not measured | Not measured |
| Oct 14, 2026 | Chen Sean Chihhsiang | President and COO | M Exercise | 15,000 | $8.12 | $121,800 |
| Oct 14, 2026 | Chen Sean Chihhsiang | President and COO | M Exercise | 15,000 | Not measured | Not measured |
| Oct 14, 2026 | Chen Sean Chihhsiang | President and COO | S Sale | 4,000 | $53.44 | $213,745 |
| Oct 14, 2026 | Chen Sean Chihhsiang | President and COO | S Sale | 1,261 | $51.53 | $64,980 |
| Oct 14, 2026 | Chen Sean Chihhsiang | President and COO | S Sale | 2,000 | $52.47 | $104,936 |
| Oct 14, 2026 | Chen Sean Chihhsiang | President and COO | S Sale | 7,539 | $50.13 | $377,923 |
| Oct 14, 2026 | Chen Sean Chihhsiang | President and COO | S Sale | 200 | $54.27 | $10,854 |
| Oct 5, 2026 | Chen Sean Chihhsiang | President and COO | S Sale | 800 | $68.08 | $54,461 |
| Oct 5, 2026 | Chen Sean Chihhsiang | President and COO | S Sale | 1,797 | $67.29 | $120,913 |
| Oct 5, 2026 | Chen Sean Chihhsiang | President and COO | S Sale | 5,508 | $66.38 | $365,625 |
| Oct 5, 2026 | Chen Sean Chihhsiang | President and COO | S Sale | 100 | $69.51 | $6,951 |
| Oct 2, 2026 | Chen Sean Chihhsiang | President and COO | S Sale | 302 | $71.86 | $21,701 |
| Oct 2, 2026 | Chen Sean Chihhsiang | President and COO | S Sale | 3,008 | $69.77 | $209,875 |
| Oct 2, 2026 | Winzeler Jeffrey G | Chief Financial Officer | S Sale | 2,828 | $69.77 | $197,316 |
| Oct 2, 2026 | Winzeler Jeffrey G | Chief Financial Officer | S Sale | 284 | $71.86 | $20,408 |
| Oct 2, 2026 | Winzeler Jeffrey G | Chief Financial Officer | S Sale | 2,343 | $69.11 | $161,921 |
| Oct 2, 2026 | Esaka Fumihide | Chief Executive Officer | S Sale | 862 | $71.86 | $61,943 |
| Oct 2, 2026 | Esaka Fumihide | Chief Executive Officer | S Sale | 8,585 | $69.77 | $598,994 |
| Oct 2, 2026 | Esaka Fumihide | Chief Executive Officer | S Sale | 7,113 | $69.11 | $491,567 |
| Oct 2, 2026 | Hanson Scott McLean | Chief Technology Officer | S Sale | 452 | $71.86 | $32,480 |
| Oct 2, 2026 | Hanson Scott McLean | Chief Technology Officer | S Sale | 4,500 | $69.77 | $313,975 |
| Oct 2, 2026 | Hanson Scott McLean | Chief Technology Officer | S Sale | 3,728 | $69.11 | $257,636 |
| Oct 2, 2026 | Chen Sean Chihhsiang | President and COO | S Sale | 2,492 | $69.11 | $172,218 |
| Sep 15, 2026 | Esaka Fumihide | Chief Executive Officer | S Sale | 9,615 | $60.55 | $582,171 |
| Sep 15, 2026 | Esaka Fumihide | Chief Executive Officer | S Sale | 3,785 | $59.56 | $225,444 |
| Sep 15, 2026 | Esaka Fumihide | Chief Executive Officer | S Sale | 100 | $61.00 | $6,100 |
| Sep 15, 2026 | Hanson Scott McLean | Chief Technology Officer | S Sale | 100 | $61.00 | $6,100 |
| Sep 15, 2026 | Hanson Scott McLean | Chief Technology Officer | S Sale | 4,947 | $60.56 | $299,573 |
| Sep 15, 2026 | Hanson Scott McLean | Chief Technology Officer | M Exercise | 7,000 | $8.12 | $56,840 |
| Sep 15, 2026 | Esaka Fumihide | Chief Executive Officer | M Exercise | 13,500 | $8.12 | $109,620 |
| Sep 15, 2026 | Hanson Scott McLean | Chief Technology Officer | S Sale | 1,953 | $59.53 | $116,270 |
| Sep 15, 2026 | Esaka Fumihide | Chief Executive Officer | M Exercise | 13,500 | Not measured | Not measured |
| Sep 15, 2026 | Hanson Scott McLean | Chief Technology Officer | M Exercise | 7,000 | Not measured | Not measured |
| Sep 14, 2026 | Chen Sean Chihhsiang | President and COO | S Sale | 2,600 | $59.36 | $154,346 |
| Sep 14, 2026 | Chen Sean Chihhsiang | President and COO | M Exercise | 15,000 | Not measured | Not measured |
| Sep 14, 2026 | Chen Sean Chihhsiang | President and COO | S Sale | 11,000 | $60.24 | $662,618 |
| Sep 14, 2026 | Chen Sean Chihhsiang | President and COO | M Exercise | 15,000 | $8.12 | $121,800 |
| Sep 14, 2026 | Chen Sean Chihhsiang | President and COO | S Sale | 1,400 | $60.83 | $85,166 |
The full Form 4 history is on the AMBQ company page (Insider Trades card, View all).
Questions about this data
Which insider transactions are open-market trades?
Code P (open market or private purchase) and code S (open market or private sale). Code F is shares withheld to pay tax on vesting stock, A is an award from the company, M and X are option exercises and G is a gift. None of those is the insider choosing to buy or sell in the market.
How quickly are insider trades reported?
A Form 4 is due before the end of the second business day after the trade. The date shown is the transaction date from the form.
Who has to file Form 4?
Officers, directors and beneficial owners of more than 10% of a class of the company’s registered equity, under Section 16 of the Securities Exchange Act.
Look up any code in the Form 4 transaction code reference, or read Form 4 codes explained.