AMBQ: Esaka Fumihide sold $255K of stock
By AlphaYouPublished Form 4
Esaka Fumihide
Reporting filer
Esaka Fumihide reported selling 5,000 shares of Ambiq Micro, Inc. for about $255K ($51.00 a share on average). Form 4 filed Oct 16, 2026 lists 6 entries.
See the price move since this trade →
- Disclosed
- Oct 16, 2026
Reported details
6 entries| Security | Owner | Date | Code | Action | Quantity | Price | Following holdings | Reporting delay | Filed terms and references |
|---|---|---|---|---|---|---|---|---|---|
| Common Stock | Esaka Fumihide | 2026-10-15 | M | Exercise or conversion | 5000 | 8.12 | 448,900 | 1 day | Filed terms
|
| Common Stock | Esaka Fumihide | 2026-10-15 | S | Sale | 500 | 49.134 | 448,400 | 1 day | Filed terms
|
| Common Stock | Esaka Fumihide | 2026-10-15 | S | Sale | 500 | 50.022 | 447,900 | 1 day | Filed terms
|
| Common Stock | Esaka Fumihide | 2026-10-15 | S | Sale | 2800 | 51.1478 | 445,100 | 1 day | Filed terms
|
| Common Stock | Esaka Fumihide | 2026-10-15 | S | Sale | 1200 | 51.8547 | 443,900 | 1 day | Filed terms
|
| Stock Option (Right to Buy) (derivative) | Esaka Fumihide | 2026-10-15 | M | Exercise or conversion | 5000 | 0 | 53,507 | 1 day | Filed terms
|
Common Stock
- Owner
- Esaka Fumihide
- Date
- 2026-10-15
- Code
- M
- Action
- Exercise or conversion
- Quantity
- 5000
- Price
- 8.12
- Following holdings
- 448,900
- Reporting delay
- 1 day
- Filed terms and references
Filed terms
- security Title: Common Stock
- transaction Date: 2026-10-15
- transaction Form Type: 4
- transaction Code: M
- equity Swap Involved: 0
- id: F1
- transaction Shares: 5000
- transaction Price Per Share: 8.12
- transaction Acquired Disposed Code: A
- shares Owned Following Transaction: 448900
- direct Or Indirect Ownership: D
- nature Of Ownership:
Common Stock
- Owner
- Esaka Fumihide
- Date
- 2026-10-15
- Code
- S
- Action
- Sale
- Quantity
- 500
- Price
- 49.134
- Following holdings
- 448,400
- Reporting delay
- 1 day
- Filed terms and references
Filed terms
- security Title: Common Stock
- transaction Date: 2026-10-15
- transaction Form Type: 4
- transaction Code: S
- equity Swap Involved: 0
- id: F1
- transaction Shares: 500
- transaction Price Per Share: 49.134
- id: F2
- transaction Acquired Disposed Code: D
- shares Owned Following Transaction: 448400
- direct Or Indirect Ownership: D
- nature Of Ownership:
Common Stock
- Owner
- Esaka Fumihide
- Date
- 2026-10-15
- Code
- S
- Action
- Sale
- Quantity
- 500
- Price
- 50.022
- Following holdings
- 447,900
- Reporting delay
- 1 day
- Filed terms and references
Filed terms
- security Title: Common Stock
- transaction Date: 2026-10-15
- transaction Form Type: 4
- transaction Code: S
- equity Swap Involved: 0
- id: F1
- transaction Shares: 500
- transaction Price Per Share: 50.022
- id: F3
- transaction Acquired Disposed Code: D
- shares Owned Following Transaction: 447900
- direct Or Indirect Ownership: D
- nature Of Ownership:
Common Stock
- Owner
- Esaka Fumihide
- Date
- 2026-10-15
- Code
- S
- Action
- Sale
- Quantity
- 2800
- Price
- 51.1478
- Following holdings
- 445,100
- Reporting delay
- 1 day
- Filed terms and references
Filed terms
- security Title: Common Stock
- transaction Date: 2026-10-15
- transaction Form Type: 4
- transaction Code: S
- equity Swap Involved: 0
- id: F1
- transaction Shares: 2800
- transaction Price Per Share: 51.1478
- id: F4
- transaction Acquired Disposed Code: D
- shares Owned Following Transaction: 445100
- direct Or Indirect Ownership: D
- nature Of Ownership:
Common Stock
- Owner
- Esaka Fumihide
- Date
- 2026-10-15
- Code
- S
- Action
- Sale
- Quantity
- 1200
- Price
- 51.8547
- Following holdings
- 443,900
- Reporting delay
- 1 day
- Filed terms and references
Filed terms
- security Title: Common Stock
- transaction Date: 2026-10-15
- transaction Form Type: 4
- transaction Code: S
- equity Swap Involved: 0
- id: F1
- transaction Shares: 1200
- transaction Price Per Share: 51.8547
- id: F5
- transaction Acquired Disposed Code: D
- shares Owned Following Transaction: 443900
- direct Or Indirect Ownership: D
- nature Of Ownership:
Stock Option (Right to Buy) (derivative)
- Owner
- Esaka Fumihide
- Date
- 2026-10-15
- Code
- M
- Action
- Exercise or conversion
- Quantity
- 5000
- Price
- 0
- Following holdings
- 53,507
- Reporting delay
- 1 day
- Filed terms and references
Filed terms
- security Title: Stock Option (Right to Buy)
- conversion Or Exercise Price: 8.12
- transaction Date: 2026-10-15
- transaction Form Type: 4
- transaction Code: M
- equity Swap Involved: 0
- id: F1
- transaction Shares: 5000
- transaction Price Per Share: 0
- transaction Acquired Disposed Code: D
- id: F6
- expiration Date: 2029-02-20
- underlying Security Title: Common Stock
- underlying Security Shares: 5000
- shares Owned Following Transaction: 53507
- direct Or Indirect Ownership: D
- nature Of Ownership:
Purchases, sales, grants and option exercises are different transactions. The reported code identifies the action; it does not establish a motive.
Filing context
- Quantities and prices are shown in the units filed. No trade value is inferred from their product.
- Esaka Fumihide: Chief Executive Officer, Director.
- The filing reports a Rule 10b5-1 trading plan.
- F1: The transactions reported in this Form 4 occurred under a Rule 10b5-1 plan adopted by the Reporting Person on May 15, 2026.
- F2: The reported price in Column 4 is a weighted average sale price. These shares were sold in multiple transactions at prices ranging from $48.66 to $49.59 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.
- F3: The reported price in Column 4 is a weighted average sale price. These shares were sold in multiple transactions at prices ranging from $49.75 to $50.74 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.
- F4: The reported price in Column 4 is a weighted average sale price. These shares were sold in multiple transactions at prices ranging from $50.77 to $51.75 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.
- F5: The reported price in Column 4 is a weighted average sale price. These shares were sold in multiple transactions at prices ranging from $51.77 to $52.00 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.
- F6: 1/4 of the shares subject to the option vested on February 21, 2020, and 1/48 of the shares subject to the option vested in equal monthly installments thereafter, subject to the Reporting Person's continued service.
Original sources
Prepared automatically from public filing data. Report a correction.