Esaka Fumihide's Form 4 filing
Ambiq Micro, Inc. (AMBQ) · filed Sep 2, 2026
- Accession no.
- 0002078454-26-000012
- Filed
- Sep 2, 2026, 4:47 PM ET
- Trade date
- Aug 31-Sep 2, 2026
- Filing delay
- 2 days
- Rule 10b5-1 plan
- Checked
This filing lists 13 non-derivative transactions and 5 derivative transactions. Open-market sales total $6.17M. It was filed 2 days after the trade.
Reporting owners
A Form 4 can have several reporting owners, such as a person and a fund they control. Trade tables show the first one.
| Owner | Relationship to the company |
|---|---|
| Esaka FumihideCIK 0002078454 | Director, Officer (Chief Executive Officer) |
Non-derivative securities (Table I)
Acquisitions and disposals of common stock and similar shares, one row per line on the filing.
| Trade date | Security | Transaction | Shares | Price | Value | Shares after | Ownership | Flags |
|---|---|---|---|---|---|---|---|---|
| Aug 31, 2026 | Common Stock | MOption exerciseAcquired | +13,500 | $8.12 | +$109,620 | 464,689 | Direct | |
| Aug 31, 2026 | Common Stock | SSaleDisposed | −5,899 | $56.87F2 | −$335,452.53 | 458,790 | Direct | |
| Aug 31, 2026 | Common Stock | SSaleDisposed | −5,501 | $57.75F3 | −$317,708.6 | 453,289 | Direct | |
| Aug 31, 2026 | Common Stock | SSaleDisposed | −2,100 | $58.52F4 | −$122,889.06 | 451,189 | Direct | |
| Aug 31, 2026 | Common Stock | MOption exerciseAcquired | +44,271 | $12.60 | +$557,814.6 | 495,460 | Direct | |
| Aug 31, 2026 | Common Stock | SSaleDisposed | −15,600 | $56.81F5 | −$886,218.84 | 479,860 | Direct | |
| Aug 31, 2026 | Common Stock | SSaleDisposed | −13,800 | $57.70F6 | −$796,276.56 | 466,060 | Direct | |
| Aug 31, 2026 | Common Stock | SSaleDisposed | −5,600 | $58.46F7 | −$327,358.64 | 460,460 | Direct | |
| Sep 1, 2026 | Common Stock | MOption exerciseAcquired | +48,973 | $12.60 | +$617,059.8 | 509,433 | Direct | |
| Sep 1, 2026 | Common Stock | SSaleDisposed | −48,973 | $56.39F8 | −$2,761,533.6 | 460,460 | Direct | |
| Sep 2, 2026 | Common Stock | MOption exerciseAcquired | +11,027 | $12.60 | +$138,940.2 | 471,487 | Direct | |
| Sep 2, 2026 | Common Stock | SSaleDisposed | −1,452 | $56.15F9 | −$81,534.01 | 470,035 | Direct | |
| Sep 2, 2026 | Common Stock | SSaleDisposed | −9,575 | $56.77F10 | −$543,573.71 | 460,460 | Direct |
Derivative securities (Table II)
Options, warrants, restricted stock units and similar. Shares are the underlying shares; price and value are for the derivative itself, and the holding after is in derivative units.
| Trade date | Security | Transaction | Underlying shares | Unit price | Value | Held after | Ownership | Flags |
|---|---|---|---|---|---|---|---|---|
| Aug 31, 2026 | Common Stock | MOption exerciseDisposed | −13,500 | $0.00 | $0 | 72,007 | Direct | |
| Aug 31, 2026 | Common Stock | MOption exerciseDisposed | −35,000 | $0.00 | $0 | 79,007 | Direct | |
| Aug 31, 2026 | Common Stock | MOption exerciseDisposed | −9,271 | $0.00 | $0 | 175,272 | Direct | |
| Sep 1, 2026 | Common Stock | MOption exerciseDisposed | −48,973 | $0.00 | $0 | 30,034 | Direct | |
| Sep 2, 2026 | Common Stock | MOption exerciseDisposed | −11,027 | $0.00 | $0 | 19,007 | Direct |
Footnotes and remarks
Livermore keeps the footnotes that transaction prices refer to, all footnotes of amendments (Form 4/A) and the filing's remarks. Other footnotes, such as how indirect holdings are held or the details of a trading plan, are only in the original on SEC EDGAR.
- F2
The reported price in Column 4 is a weighted average sale price. These shares were sold in multiple transactions at prices ranging from $56.35 to $57.34 per share. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.
Referenced by the price of 1 transaction in Table I.
- F3
The reported price in Column 4 is a weighted average sale price. These shares were sold in multiple transactions at prices ranging from $57.37 to $58.24 per share. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.
Referenced by the price of 1 transaction in Table I.
- F4
The reported price in Column 4 is a weighted average sale price. These shares were sold in multiple transactions at prices ranging from $58.42 to $58.74 per share. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.
Referenced by the price of 1 transaction in Table I.
- F5
The reported price in Column 4 is a weighted average sale price. These shares were sold in multiple transactions at prices ranging from $56.29 to $57.28 per share. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.
Referenced by the price of 1 transaction in Table I.
- F6
The reported price in Column 4 is a weighted average sale price. These shares were sold in multiple transactions at prices ranging from $57.29 to $58.28 per share. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.
Referenced by the price of 1 transaction in Table I.
- F7
The reported price in Column 4 is a weighted average sale price. These shares were sold in multiple transactions at prices ranging from $58.29 to $58.49 per share. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.
Referenced by the price of 1 transaction in Table I.
- F8
The reported price in Column 4 is a weighted average sale price. These shares were sold in multiple transactions at prices ranging from $56.00 to $56.83 per share. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.
Referenced by the price of 1 transaction in Table I.
- F9
The reported price in Column 4 is a weighted average sale price. These shares were sold in multiple transactions at prices ranging from $55.45 to $56.44 per share. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.
Referenced by the price of 1 transaction in Table I.
- F10
The reported price in Column 4 is a weighted average sale price. These shares were sold in multiple transactions at prices ranging from $56.46 to $57.06 per share. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.
Referenced by the price of 1 transaction in Table I.