Ambiq Micro, Inc.
AMBQ- Exchange
- NYSE
- Industry
- Semiconductors & Related Devices
- SEC CIK
- 0001500412
In the last 90 days, Ambiq Micro, Inc. insiders filed 0 open-market purchases and 10 sales; 184 institutions reported holding it in 13F filings for Q2 2026, worth $1.51B in total; no superinvestor holds it.
Open-market trades, last 90 days
Open-market purchases (P) and sales (S) by Ambiq Micro, Inc. insiders, counted by Form 4 filing. Trades with a flagged price and duplicate filings are left out.
- Open-market buys
- 0 filings
- Open-market sells
- 10 filings
- 4 insiders, $17.6M in total
- Insiders trading
- 4
- Net value
- −$17.6M
- Purchases minus sales
Insider roster
Directors, officers and 10% owners who have filed a Form 4 for Ambiq Micro, Inc., current and former, most recent filer first. Last reported holding is the position after the last non-derivative trade in their latest filing.
| Name | Title | Last reported holding | Last filing | Filings, past year |
|---|---|---|---|---|
| Hanson Scott McLean | Chief Technology Officer | 221,226 | Sep 17, 2026 | 7 |
| Zhang Ker | Director | 20,366 | Sep 15, 2026 | 3 |
| Chen Sean Chihhsiang | President and COO | 120,275 | Sep 15, 2026 | 5 |
| Esaka Fumihide | Chief Executive Officer | 460,460 | Sep 15, 2026 | 7 |
| Tautges Joseph A | Director | 53,703 | Jun 10, 2026 | 2 |
| Chen Timothy | Director | 52,575 | Jun 10, 2026 | 3 |
| HSIEH Wen Hsuan | Director | 4,957 | Jun 10, 2026 | 2 |
| Banks Bernard Bennett | Director | 4,957 | Jun 10, 2026 | 1 |
| Winzeler Jeffrey G | Chief Financial Officer | 106,299 | Jun 4, 2026 | 4 |
| Connors Michele Kim | General Counsel | 60,554 | Apr 6, 2026 | 3 |
| Kleiner Perkins Caufield & Byers XVI, LLC | 10% Owner | 1,488,949Indirect | Jul 31, 2025 | 0 |
| KPCB XVI Associates, LLC | 10% Owner | 1,488,949Indirect | Jul 31, 2025 | 0 |
Insider trades
Each row adds up one type of transaction in one Form 4 filing. Only open-market purchases (P) and sales (S) are shown by default; use the filters to see grants, option exercises and other codes.
| Filed (ET) | Trade date | Filing delay | Insider | Transaction | Shares | Avg price | Value | Holding change | Flags |
|---|---|---|---|---|---|---|---|---|---|
| Sep 17, 2026 (view filing)4:06 PM ET | Sep 15 | 2 days | Hanson Scott McLeanChief Technology Officer | SSale | −7.00K | $60.28 | −$421.9K | −3.1%221.2K after | 3 lots10b5-1 |
| Sep 15, 2026 (view filing)6:58 PM ET | Sep 11 | 4 days | Zhang KerDirector | SSale | −10.0K | $63.44 | −$634.4K | −32.9%20.4K after | 2 lots |
| Sep 15, 2026 (view filing)6:57 PM ET | Sep 14 | 1 day | Chen Sean ChihhsiangPresident and COO | SSale | −15.0K | $60.14 | −$902.1K | −11.1%120.3K after | 3 lots10b5-1 |
| Sep 15, 2026 (view filing)6:56 PM ET | Sep 11-15 | 4 days | Esaka FumihideChief Executive Officer | SSale | −63.5K | $62.70 | −$3.98M | −12.1%460.5K after | 5 lots10b5-1 |
| Sep 9, 2026 (view filing)5:10 PM ET | Sep 4 | 5 days | Chen Sean ChihhsiangPresident and COO | SSale | −15.0K | $57.17 | −$857.6K | −11.1%120.3K after | 2 lots10b5-1 |
| Sep 9, 2026 (view filing)5:08 PM ET | Sep 4 | 5 days | Zhang KerDirector | SSale | −185 | $56.92 | −$10.5K | −0.6%30.4K after | |
| Sep 2, 2026 (view filing)4:47 PM ET | Aug 31-Sep 2 | 2 days | Esaka FumihideChief Executive Officer | SSale | −108.5K | $56.89 | −$6.17M | −19.1%460.5K after | 9 lots10b5-1 |
| Aug 28, 2026 (view filing)5:19 PM ET | Aug 26-27 | 2 days | Hanson Scott McLeanChief Technology Officer | SSale | −55.0K | $59.69 | −$3.28M | −19.9%221.2K after | 3 lots |
| Aug 18, 2026 (view filing)4:40 PM ET | Aug 14 | 4 days | Hanson Scott McLeanChief Technology Officer | SSale | −7.00K | $64.38 | −$450.6K | −3.2%211.2K after | 3 lots10b5-1 |
| Aug 18, 2026 (view filing)4:30 PM ET | Aug 14 | 4 days | Esaka FumihideChief Executive Officer | SSale | −13.5K | $64.39 | −$869.2K | −2.9%451.2K after | 3 lots10b5-1 |
| May 29, 2026 (view filing) | May 27 | 2 days | Chen TimothyDirector | SSale | −70.6K | $79.79 | −$5.63M | −100.0%0 after | 4 lots |
| May 18, 2026 (view filing) | May 15 | 3 days | Chen Sean ChihhsiangPresident and COO | SSale | −55.7K | $70.88 | −$3.95M | −31.6%120.3K after | 2 lots |
| May 18, 2026 (view filing) | May 14 | 4 days | Esaka FumihideChief Executive Officer | SSale | −60.0K | $70.02 | −$4.20M | −13.3%391.2K after | |
| May 18, 2026 (view filing) | May 14 | 4 days | Hanson Scott McLeanChief Technology Officer | SSale | −10.2K | $69.24 | −$706.2K | −4.8%203.1K after | 3 lots |
| May 18, 2026 (view filing) | May 14 | 4 days | Winzeler Jeffrey GChief Financial Officer | SSale | −26.0K | $69.90 | −$1.82M | −21.6%94.4K after | 2 lots |
| Apr 6, 2026 (view filing) | Apr 2 | 4 days | Connors Michele KimGeneral Counsel | SSale | −811 | $26.15 | −$21.2K | −1.3%60.6K after | 2 lots |
| Jan 28, 2026 (view filing) | Jan 26 | 2 days | Hanson Scott McLeanChief Technology Officer | SSale | −10.0K | $31.00 | −$310.0K | −7.5%122.8K after | |
| Jan 28, 2026 (view filing) | Jan 26 | 2 days | Tautges Joseph ADirector | SSale | −7.80K | $31.00 | −$241.8K | −13.8%48.7K after |