CIK 0001500412 · Non-accelerated filer<br>Smaller reporting company<br>Emerging growth company
Ambiq Micro, Inc.
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- AMBQ
- Exchange
- NYSE
- Industry
- Semiconductors & Related Devices
- FY end
- Dec 31
- Incorporated
- DE
- Entity type
- operating
- EIN
- 271911389
- Phone
- (512) 879-2850
- Business address
- 6500 RIVER PLACE BOULEVARD, BUILDING 7, SUITE 200, AUSTIN, TX, 78730
- Open-market buys, last 90 days
- $0
- in 0 filings
- Open-market sales, last 90 days
- $20,736,302
- in 15 filings, $14.7M under 10b5-1 plans
Net −$20,736,302. Shares bought or sold at a price by officers, directors and 10% owners (Form 4 codes P and S). Grants, option exercises and tax withholding aren't counted.
Who's trading
90 days
- Esaka Fumihide −$11.6M Chief Executive Officer sold 30% of stake
- Hanson Scott McLean −$4.7M Chief Technology Officer sold 27% of stake
- Chen Sean Chihhsiang −$3.5M President and COO sold 36% of stake
- ZHANG KER −$645K Director sold 33% of stake
- Winzeler Jeffrey G −$380K Chief Financial Officer sold 5% of stake
| Date | Insider | Transaction | Shares | Price | Value | Owned after |
|---|---|---|---|---|---|---|
| 2026-09-04 | Chen Sean Chihhsiang President and COO | Option exercise · Stock Option (Right to Buy) 10b5-1 | −15,000 | 149,423 | ||
| 2026-09-04 | ZHANG KER Director | Option exercise | +1,785 | $5.88 | $10K | 30,551 |
| 2026-09-04 | ZHANG KER Director | Sale | −185 | $56.92 | $11K | 30,366 |
| 2026-09-04 | ZHANG KER Director | Option exercise · Stock Option (Right to Buy) | −1,785 | 0 | ||
| 2026-09-02 | Esaka Fumihide Chief Executive Officer | Option exercise 10b5-1 | +11,027 | $12.60 | $139K | 471,487 |
| 2026-09-02 | Esaka Fumihide Chief Executive Officer | Sale 10b5-1 | −1,452 | $56.15 | $82K | 470,035 |
| 2026-09-02 | Esaka Fumihide Chief Executive Officer | Sale 10b5-1 | −9,575 | $56.77 | $544K | 460,460 |
| 2026-09-02 | Esaka Fumihide Chief Executive Officer | Option exercise · Stock Option (Right to Buy) 10b5-1 | −11,027 | 19,007 | ||
| 2026-09-01 | Esaka Fumihide Chief Executive Officer | Option exercise 10b5-1 | +48,973 | $12.60 | $617K | 509,433 |
| 2026-09-01 | Esaka Fumihide Chief Executive Officer | Sale 10b5-1 | −48,973 | $56.39 | $2.8M | 460,460 |
| 2026-09-01 | Esaka Fumihide Chief Executive Officer | Option exercise · Stock Option (Right to Buy) 10b5-1 | −48,973 | 30,034 | ||
| 2026-08-31 | Esaka Fumihide Chief Executive Officer | Option exercise 10b5-1 | +13,500 | $8.12 | $110K | 464,689 |
| 2026-08-31 | Esaka Fumihide Chief Executive Officer | Sale 10b5-1 | −5,899 | $56.87 | $335K | 458,790 |
| 2026-08-31 | Esaka Fumihide Chief Executive Officer | Sale 10b5-1 | −5,501 | $57.75 | $318K | 453,289 |
| 2026-08-31 | Esaka Fumihide Chief Executive Officer | Sale 10b5-1 | −2,100 | $58.52 | $123K | 451,189 |
| 2026-08-31 | Esaka Fumihide Chief Executive Officer | Option exercise 10b5-1 | +44,271 | $12.60 | $558K | 495,460 |
| 2026-08-31 | Esaka Fumihide Chief Executive Officer | Sale 10b5-1 | −15,600 | $56.81 | $886K | 479,860 |
| 2026-08-31 | Esaka Fumihide Chief Executive Officer | Sale 10b5-1 | −13,800 | $57.70 | $796K | 466,060 |
| 2026-08-31 | Esaka Fumihide Chief Executive Officer | Sale 10b5-1 | −5,600 | $58.46 | $327K | 460,460 |
| 2026-08-31 | Esaka Fumihide Chief Executive Officer | Option exercise · Stock Option (Right to Buy) 10b5-1 | −13,500 | 72,007 |
Page 4 of 9 · 176 trades