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 |
|---|---|---|---|---|---|---|
| 2026-09-15 | Esaka Fumihide Chief Executive Officer | Option exercise 10b5-1 | +13,500 | $8.12 | $110K | 473,960 |
| 2026-09-15 | Esaka Fumihide Chief Executive Officer | Sale 10b5-1 | −3,785 | $59.56 | $225K | 470,175 |
| 2026-09-15 | Esaka Fumihide Chief Executive Officer | Sale 10b5-1 | −9,615 | $60.55 | $582K | 460,560 |
| 2026-09-15 | Esaka Fumihide Chief Executive Officer | Sale 10b5-1 | −100 | $61.00 | $6K | 460,460 |
| 2026-09-15 | Esaka Fumihide Chief Executive Officer | Option exercise · Stock Option (Right to Buy) 10b5-1 | −13,500 | 58,507 | ||
| 2026-09-14 | Chen Sean Chihhsiang President and COO | Option exercise 10b5-1 | +15,000 | $8.12 | $122K | 135,275 |
| 2026-09-14 | Chen Sean Chihhsiang President and COO | Sale 10b5-1 | −2,600 | $59.36 | $154K | 132,675 |
| 2026-09-14 | Chen Sean Chihhsiang President and COO | Sale 10b5-1 | −11,000 | $60.24 | $663K | 121,675 |
| 2026-09-14 | Chen Sean Chihhsiang President and COO | Sale 10b5-1 | −1,400 | $60.83 | $85K | 120,275 |
| 2026-09-14 | Chen Sean Chihhsiang President and COO | Option exercise · Stock Option (Right to Buy) 10b5-1 | −15,000 | 134,423 | ||
| 2026-09-11 | Esaka Fumihide Chief Executive Officer | Option exercise 10b5-1 | +50,000 | $12.60 | $630K | 510,460 |
| 2026-09-11 | Esaka Fumihide Chief Executive Officer | Sale 10b5-1 | −42,083 | $63.27 | $2.7M | 468,377 |
| 2026-09-11 | Esaka Fumihide Chief Executive Officer | Sale 10b5-1 | −7,917 | $63.86 | $506K | 460,460 |
| 2026-09-11 | Esaka Fumihide Chief Executive Officer | Option exercise · Stock Option (Right to Buy) 10b5-1 | −19,007 | 0 | ||
| 2026-09-11 | Esaka Fumihide Chief Executive Officer | Option exercise · Stock Option (Right to Buy) 10b5-1 | −30,993 | 144,279 | ||
| 2026-09-11 | ZHANG KER Director | Sale | −9,100 | $63.39 | $577K | 21,266 |
| 2026-09-11 | ZHANG KER Director | Sale | −900 | $63.95 | $58K | 20,366 |
| 2026-09-04 | Chen Sean Chihhsiang President and COO | Option exercise 10b5-1 | +15,000 | $8.12 | $122K | 135,275 |
| 2026-09-04 | Chen Sean Chihhsiang President and COO | Sale 10b5-1 | −12,874 | $57.09 | $735K | 122,401 |
| 2026-09-04 | Chen Sean Chihhsiang President and COO | Sale 10b5-1 | −2,126 | $57.68 | $123K | 120,275 |
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