Fumihide Esaka
CIK: 0002078454
Transaction Breakdown
High conviction signal
Position reduction
Derivative conversions
Compensation grants
Gifts, tax withholding, conversions, dispositions to the issuer and other codes
Companies & Roles (1)
Ambiq Micro, Inc.
Discretionary Trading P&L
Holdings
Transaction History (39 total)
- Oct 15, 2026AMBQ
Ambiq Micro, Inc.
Sale(S)Direct500 shares at avg. $50.02$25K - Oct 15, 2026AMBQ
Ambiq Micro, Inc.
Sale(S)Direct2.8K shares at avg. $51.15$143K - Oct 15, 2026AMBQ
Ambiq Micro, Inc.
Sale(S)Direct1.2K shares at avg. $51.85$62K - Oct 15, 2026AMBQ
Ambiq Micro, Inc.
Sale(S)Direct500 shares at avg. $49.13$25K - Oct 15, 2026AMBQ
Ambiq Micro, Inc.
Exercise(M)Direct5K shares at avg. $8.12$41K - Oct 2, 2026AMBQ
Ambiq Micro, Inc.
Sale(S)Direct862 shares at avg. $71.86$62K - Oct 2, 2026AMBQ
Ambiq Micro, Inc.
Sale(S)Direct7.1K shares at avg. $69.11$492K - Oct 2, 2026AMBQ
Ambiq Micro, Inc.
Sale(S)Direct8.6K shares at avg. $69.77$599K - Sep 15, 2026AMBQ
Ambiq Micro, Inc.
Sale(S)Direct100 shares at avg. $61.00$6K - Sep 15, 2026AMBQ
Ambiq Micro, Inc.
Sale(S)Direct9.6K shares at avg. $60.55$582K - Sep 15, 2026AMBQ
Ambiq Micro, Inc.
Sale(S)Direct3.8K shares at avg. $59.56$225K - Sep 15, 2026AMBQ
Ambiq Micro, Inc.
Exercise(M)Direct13.5K shares at avg. $8.12$110K - Sep 11, 2026AMBQ
Ambiq Micro, Inc.
Sale(S)Direct7.9K shares at avg. $63.86$506K - Sep 11, 2026AMBQ
Ambiq Micro, Inc.
Sale(S)Direct42.1K shares at avg. $63.27$2.7M - Sep 11, 2026AMBQ
Ambiq Micro, Inc.
Exercise(M)Direct50K shares at avg. $12.60$630K - Sep 2, 2026AMBQ
Ambiq Micro, Inc.
Sale(S)Direct9.6K shares at avg. $56.77$544K - Sep 2, 2026AMBQ
Ambiq Micro, Inc.
Sale(S)Direct1.5K shares at avg. $56.15$82K - Sep 2, 2026AMBQ
Ambiq Micro, Inc.
Exercise(M)Direct11K shares at avg. $12.60$139K - Sep 1, 2026AMBQ
Ambiq Micro, Inc.
Exercise(M)Direct49K shares at avg. $12.60$617K - Sep 1, 2026AMBQ
Ambiq Micro, Inc.
Sale(S)Direct49K shares at avg. $56.39$2.8M - Aug 31, 2026AMBQ
Ambiq Micro, Inc.
Sale(S)Direct5.9K shares at avg. $56.87$335K - Aug 31, 2026AMBQ
Ambiq Micro, Inc.
Exercise(M)Direct13.5K shares at avg. $8.12$110K - Aug 31, 2026AMBQ
Ambiq Micro, Inc.
Sale(S)Direct5.5K shares at avg. $57.75$318K - Aug 31, 2026AMBQ
Ambiq Micro, Inc.
Sale(S)Direct2.1K shares at avg. $58.52$123K - Aug 31, 2026AMBQ
Ambiq Micro, Inc.
Exercise(M)Direct44.3K shares at avg. $12.60$558K
| Type | Shares | Price | Ownership | |||
|---|---|---|---|---|---|---|
| Oct 15, 2026 | AMBQ Ambiq Micro, Inc. | Sale(S) | 500 | $50.02 | $25,011 | Direct |
| Oct 15, 2026 | AMBQ Ambiq Micro, Inc. | Sale(S) | 2,800 | $51.15 | $143,214 | Direct |
| Oct 15, 2026 | AMBQ Ambiq Micro, Inc. | Sale(S) | 1,200 | $51.85 | $62,226 | Direct |
| Oct 15, 2026 | AMBQ Ambiq Micro, Inc. | Sale(S) | 500 | $49.13 | $24,567 | Direct |
| Oct 15, 2026 | AMBQ Ambiq Micro, Inc. | Exercise(M) | 5,000 | $8.12 | $40,600 | Direct |
| Oct 2, 2026 | AMBQ Ambiq Micro, Inc. | Sale(S) | 862 | $71.86 | $61,943 | Direct |
| Oct 2, 2026 | AMBQ Ambiq Micro, Inc. | Sale(S) | 7,113 | $69.11 | $491,567 | Direct |
| Oct 2, 2026 | AMBQ Ambiq Micro, Inc. | Sale(S) | 8,585 | $69.77 | $598,994 | Direct |
| Sep 15, 2026 | AMBQ Ambiq Micro, Inc. | Sale(S) | 100 | $61.00 | $6,100 | Direct |
| Sep 15, 2026 | AMBQ Ambiq Micro, Inc. | Sale(S) | 9,615 | $60.55 | $582,171 | Direct |
| Sep 15, 2026 | AMBQ Ambiq Micro, Inc. | Sale(S) | 3,785 | $59.56 | $225,444 | Direct |
| Sep 15, 2026 | AMBQ Ambiq Micro, Inc. | Exercise(M) | 13,500 | $8.12 | $109,620 | Direct |
| Sep 11, 2026 | AMBQ Ambiq Micro, Inc. | Sale(S) | 7,917 | $63.86 | $505,566 | Direct |
| Sep 11, 2026 | AMBQ Ambiq Micro, Inc. | Sale(S) | 42,083 | $63.27 | $2,662,427 | Direct |
| Sep 11, 2026 | AMBQ Ambiq Micro, Inc. | Exercise(M) | 50,000 | $12.60 | $630,000 | Direct |
| Sep 2, 2026 | AMBQ Ambiq Micro, Inc. | Sale(S) | 9,575 | $56.77 | $543,574 | Direct |
| Sep 2, 2026 | AMBQ Ambiq Micro, Inc. | Sale(S) | 1,452 | $56.15 | $81,534 | Direct |
| Sep 2, 2026 | AMBQ Ambiq Micro, Inc. | Exercise(M) | 11,027 | $12.60 | $138,940 | Direct |
| Sep 1, 2026 | AMBQ Ambiq Micro, Inc. | Exercise(M) | 48,973 | $12.60 | $617,060 | Direct |
| Sep 1, 2026 | AMBQ Ambiq Micro, Inc. | Sale(S) | 48,973 | $56.39 | $2,761,534 | Direct |
| Aug 31, 2026 | AMBQ Ambiq Micro, Inc. | Sale(S) | 5,899 | $56.87 | $335,453 | Direct |
| Aug 31, 2026 | AMBQ Ambiq Micro, Inc. | Exercise(M) | 13,500 | $8.12 | $109,620 | Direct |
| Aug 31, 2026 | AMBQ Ambiq Micro, Inc. | Sale(S) | 5,501 | $57.75 | $317,709 | Direct |
| Aug 31, 2026 | AMBQ Ambiq Micro, Inc. | Sale(S) | 2,100 | $58.52 | $122,889 | Direct |
| Aug 31, 2026 | AMBQ Ambiq Micro, Inc. | Exercise(M) | 44,271 | $12.60 | $557,815 | Direct |
1-25 of 39 transactions
About Esaka Fumihide
Esaka Fumihide (SEC CIK 0002078454) files insider reports with the SEC as Chief Executive Officer of Ambiq Micro, Inc. (AMBQ).
Signal8 holds 11 ownership filings by Esaka Fumihide (1 Form 3, 10 Form 4), filed between Jul 29, 2025 and Oct 16, 2026. Those filings report 39 transactions, from Oct 2, 2025 to Oct 15, 2026. Signal8's Form 4 history starts in Sep 2024.
The business address on Esaka Fumihide's filings is in AUSTIN, TX.
Recent filings by Esaka Fumihide
- Oct 15, 2026: Open-market sales of AMBQ shares (4 lines, Form 4, code S).
- Oct 15, 2026: Option exercise of AMBQ shares (Form 4, code M).
- Oct 2, 2026: Open-market sales of AMBQ shares (3 lines, Form 4, code S).
- Sep 15, 2026: Open-market sales of AMBQ shares (3 lines, Form 4, code S).
- Sep 15, 2026: Option exercise of AMBQ shares (Form 4, code M).
Other insiders filing for Ambiq Micro, Inc. (AMBQ)
- Hanson Scott McLean, Chief Technology Officer
- Chen Sean Chihhsiang, President and COO
- Winzeler Jeffrey G, Chief Financial Officer
- ZHANG KER, Director
- HSIEH Wen Hsuan, Director
- Chen Timothy, Director