AMBQ
Ambiq Micro, Inc. · Technology · Market cap $1.2B
Insiders sold $22.1M net in the last 90 days ·5 sellers, 0 buyers· 15 of 22 sales under Rule 10b5-1 plans· latest Form 4 filed Oct 16, 2026
Insider Buying
$0
reported purchases (SEC code P)
Insider Selling
$38.9M
reported sales (SEC code S)
Unique Insiders
8
in the rolling window
Latest filing
Oct 16, 2026
Hanson Scott McLean
Ambiq Micro, Inc. (AMBQ) has 45 SEC Form 4 filings (126 transaction rows) in the rolling window, disclosed by 8 distinct insiders. Most recent filing: Oct 16, 2026.
Inside the rolling window, 8 insiders at Ambiq Micro, Inc. reported no open-market purchases and 30 open-market sales totaling $38.9M. The most active filer is Chief Executive Officer Esaka Fumihide with 9 filings. Insiders have net sold $38.4M over the trailing 6 months. The most recent open-market filing is a sale of 7,000 shares by Chief Technology Officer Hanson Scott McLean, dated Oct 15, 2026, worth $357K.
- Industry:Semiconductors
- CEO:Fumihide Esaka
- Employees:201
- HQ:Austin, TX, US
- IPO:2025-07-30
| Source | |||||||
|---|---|---|---|---|---|---|---|
| Chief Technology Officer | Sale | 7,000 | $357K | Oct 16 | +2.2% | SEC ↗ | |
| Chief Executive Officer | Sale | 5,000 | $255K | Oct 16 | +2.2% | SEC ↗ | |
| President and COO | Sale | 15,000 | $772K | Oct 16 | +2.2% | SEC ↗ | |
Winzeler Jeffrey GFirst in 5 months | Chief Financial Officer | Sale | 5,455 | $380K | Oct 7 | — | SEC ↗ |
| Chief Executive Officer | Sale | 16,560 | $1.2M | Oct 6 | — | SEC ↗ | |
| Chief Technology Officer | Sale | 8,680 | $604K | Oct 6 | — | SEC ↗ | |
| President and COO | Sale | 5,802 | $404K | Oct 6 | — | SEC ↗ | |
| President and COO | Sale | 8,205 | $548K | Oct 6 | — | SEC ↗ | |
| Chief Technology Officer | Sale | 7,000 | $422K | Sep 17 | — | SEC ↗ | |
| Director | Sale | 10,000 | $634K | Sep 15 | — | SEC ↗ | |
| President and COO | Sale | 15,000 | $902K | Sep 15 | — | SEC ↗ | |
| Chief Executive Officer | Sale | 50,000 | $3.2M | Sep 15 | — | SEC ↗ | |
| Chief Executive Officer | Sale | 13,500 | $814K | Sep 15 | — | SEC ↗ | |
Chen Sean ChihhsiangFirst in 4 months | President and COO | Sale | 15,000 | $858K | Sep 9 | — | SEC ↗ |
ZHANG KERFirst filing | Director | Sale | 185 | $11K | Sep 9 | — | SEC ↗ |
| Chief Executive Officer | Sale | 48,500 | $2.8M | Sep 2 | — | SEC ↗ | |
| Chief Executive Officer | Sale | 48,973 | $2.8M | Sep 2 | — | SEC ↗ | |
| Chief Executive Officer | Sale | 11,027 | $625K | Sep 2 | — | SEC ↗ | |
| Chief Technology Officer | Sale | 27,500 | $1.6M | Aug 28 | — | SEC ↗ | |
| Chief Technology Officer | Sale | 27,500 | $1.6M | Aug 28 | — | SEC ↗ | |
Esaka FumihideFirst in 3 months | Chief Executive Officer | Sale | 13,500 | $869K | Aug 18 | — | SEC ↗ |
Hanson Scott McLeanFirst in 3 months | Chief Technology Officer | Sale | 7,000 | $451K | Aug 18 | — | SEC ↗ |
Chen TimothyFirst filing | Director | Sale | 70,592 | $5.6M | May 29 | — | SEC ↗ |
Chen Sean ChihhsiangFirst filing | President and COO | Sale | 55,685 | $3.9M | May 18 | — | SEC ↗ |
Esaka FumihideFirst filing | Chief Executive Officer | Sale | 60,000 | $4.2M | May 18 | — | SEC ↗ |
Earnings: last 7 quarters
Frequently asked questions
How many SEC Form 4 insider filings does AMBQ have?
Ambiq Micro, Inc. (AMBQ) has 45 SEC Form 4 filings (126 transaction rows) in the rolling 365-day window, disclosed by 8 distinct insiders. Most recent filing: Oct 16, 2026.
When was the most recent SEC Form 4 filing for AMBQ?
The most recent Form 4 filing for AMBQ on Tracefour is dated Oct 16, 2026.
Who is the most active insider at AMBQ?
The most active SEC Form 4 filer at AMBQ in the rolling window is Chief Executive Officer Esaka Fumihide, with 9 filings.
What is the net insider flow at AMBQ over the last 6 months?
Over the trailing 180 days, insiders at AMBQ have net sold $38.4M based on SEC Form 4 disclosures.
What is the total insider buy and sell value at AMBQ in the current window?
Inside the rolling window, insiders at AMBQ bought $0 and sold $38.9M based on SEC Form 4 filings.
Can I get alerts for AMBQ insider trading?
Yes. Tracefour sends a free email when a new SEC Form 4 purchase or sale is filed at Ambiq Micro, Inc. (AMBQ). Alerts are set per company from the page itself, there is no paid tier, and each email links to the original filing on SEC EDGAR.
Related companies
Ambiq Micro, Inc. is in the Technology sector.