Esaka Fumihide Insider Trading -- Recent SEC Form 4 Transactions
Esaka Fumihide (CIK 2078454) reported 35 SEC Form 4 insider transactions across 1 companies over the past 18 months (most recent 2026-10-06). Recent activity: Sell AMBQ (7,113 shares), Sell AMBQ (8,585 shares), Sell AMBQ (862 shares), Buy AMBQ (50,000 shares), Sell AMBQ (42,083 shares). Source: SEC Form 4.
| Date | Company | Role | Type | Shares | Value |
|---|---|---|---|---|---|
| 2026-10-06 | Ambiq Micro, Inc. (AMBQ) | Chief Executive Officer | Sell | 7,113 | $491,567 |
| 2026-10-06 | Ambiq Micro, Inc. (AMBQ) | Chief Executive Officer | Sell | 8,585 | $598,994 |
| 2026-10-06 | Ambiq Micro, Inc. (AMBQ) | Chief Executive Officer | Sell | 862 | $61,943 |
| 2026-09-15 | Ambiq Micro, Inc. (AMBQ) | Chief Executive Officer | Buy | 50,000 | $630,000 |
| 2026-09-15 | Ambiq Micro, Inc. (AMBQ) | Chief Executive Officer | Sell | 42,083 | $2.7M |
| 2026-09-15 | Ambiq Micro, Inc. (AMBQ) | Chief Executive Officer | Sell | 7,917 | $505,566 |
| 2026-09-15 | Ambiq Micro, Inc. (AMBQ) | Chief Executive Officer | Buy | 13,500 | $109,620 |
| 2026-09-15 | Ambiq Micro, Inc. (AMBQ) | Chief Executive Officer | Sell | 3,785 | $225,444 |
| 2026-09-15 | Ambiq Micro, Inc. (AMBQ) | Chief Executive Officer | Sell | 9,615 | $582,171 |
| 2026-09-15 | Ambiq Micro, Inc. (AMBQ) | Chief Executive Officer | Sell | 100 | $6,100 |
| 2026-09-02 | Ambiq Micro, Inc. (AMBQ) | Chief Executive Officer | Sell | 5,501 | $317,709 |
| 2026-09-02 | Ambiq Micro, Inc. (AMBQ) | Chief Executive Officer | Sell | 5,899 | $335,453 |
| 2026-09-02 | Ambiq Micro, Inc. (AMBQ) | Chief Executive Officer | Buy | 13,500 | $109,620 |
| 2026-09-02 | Ambiq Micro, Inc. (AMBQ) | Chief Executive Officer | Sell | 2,100 | $122,889 |
| 2026-09-02 | Ambiq Micro, Inc. (AMBQ) | Chief Executive Officer | Buy | 44,271 | $557,815 |
| 2026-09-02 | Ambiq Micro, Inc. (AMBQ) | Chief Executive Officer | Sell | 15,600 | $886,219 |
| 2026-09-02 | Ambiq Micro, Inc. (AMBQ) | Chief Executive Officer | Sell | 13,800 | $796,277 |
| 2026-09-02 | Ambiq Micro, Inc. (AMBQ) | Chief Executive Officer | Sell | 5,600 | $327,359 |
| 2026-09-02 | Ambiq Micro, Inc. (AMBQ) | Chief Executive Officer | Buy | 48,973 | $617,060 |
| 2026-09-02 | Ambiq Micro, Inc. (AMBQ) | Chief Executive Officer | Sell | 48,973 | $2.8M |
| 2026-09-02 | Ambiq Micro, Inc. (AMBQ) | Chief Executive Officer | Buy | 11,027 | $138,940 |
| 2026-09-02 | Ambiq Micro, Inc. (AMBQ) | Chief Executive Officer | Sell | 1,452 | $81,534 |
| 2026-09-02 | Ambiq Micro, Inc. (AMBQ) | Chief Executive Officer | Sell | 9,575 | $543,574 |
| 2026-08-18 | Ambiq Micro, Inc. (AMBQ) | Chief Executive Officer | Buy | 13,500 | $109,620 |
| 2026-08-18 | Ambiq Micro, Inc. (AMBQ) | Chief Executive Officer | Sell | 1,282 | $81,132 |
Source: SEC Form 4 filings · as of 2026-10-06