Esaka Fumihide — SEC Form 4 filings
SEC reporting owner CIK 2078454. 8 Form 4 filings on record with FilingPulse; latest filed 2026-09-15.
Transaction summary — filings shown
Covers all 8 filings on record, filed 2025-10-06 to 2026-09-15. Counts and totals are arithmetic on values as filed — descriptive data, not a recommendation.
- Open-market purchases (code P, non-derivative): none reported.
- Open-market sales (code S, non-derivative): 18 legs across 4 filings — 245,500 shares, $15,224,602 total (shares × price as filed).
- Other reported legs (grants, option exercises, tax withholding, gifts, derivative-security transactions, …): 28.
- Largest priced transaction: sale of 60,000 shares @ $70.02 ($4,201,122) in Ambiq Micro, Inc., filed 2026-05-18.
By issuer — same filings
Open-market purchase/sale legs on non-derivative securities, grouped by issuer. Role is as filed on the newest filing for that issuer. Dollar totals cover priced legs only (shares × price as filed). Ordered by priced transaction value, largest first.
| Issuer | Role (as filed) | Filings | Purchases (P) | Sales (S) | Other legs |
|---|---|---|---|---|---|
| Ambiq Micro, Inc. (AMBQ) | Chief Executive Officer, Director | 8 | — | 18 legs · 245,500 sh · $15,224,602 | 28 |
Form 4 filings — Esaka Fumihide
| Filed | Form | Issuer | Reported transactions | Source |
|---|---|---|---|---|
| 2026-09-15 | 4 | Ambiq Micro, Inc. (AMBQ) | Option exercise (M): 50,000 @ $12.60 · Sale (S): 42,083 @ $63.27 · Sale (S): 7,917 @ $63.86 · Option exercise (M): 13,500 @ $8.12 · Sale (S): 3,785 @ $59.56 · Sale (S): 9,615 @ $60.55 · +4 more | EDGAR |
| 2026-09-02 | 4 | Ambiq Micro, Inc. (AMBQ) | Option exercise (M): 13,500 @ $8.12 · Sale (S): 5,899 @ $56.87 · Sale (S): 5,501 @ $57.75 · Sale (S): 2,100 @ $58.52 · Option exercise (M): 44,271 @ $12.60 · Sale (S): 15,600 @ $56.81 · +12 more | EDGAR |
| 2026-08-18 | 4 | Ambiq Micro, Inc. (AMBQ) | Option exercise (M): 13,500 @ $8.12 · Sale (S): 1,282 @ $63.29 · Sale (S): 10,718 @ $64.40 · Sale (S): 1,500 @ $65.26 · Option exercise (M): 13,500 (derivative) @ $0 | EDGAR |
| 2026-05-18 | 4 | Ambiq Micro, Inc. (AMBQ) | Option exercise (M): 60,000 @ $8.12 · Sale (S): 60,000 @ $70.02 · Option exercise (M): 45,463 @ $8.12 · Option exercise (M): 14,537 @ $12.60 · Option exercise (M): 60,000 (derivative) @ $0 · Option exercise (M): 45,463 (derivative) @ $0 · +2 more | EDGAR |
| 2026-04-02 | 4/A | Ambiq Micro, Inc. (AMBQ) | Grant/award (A): 160,616 @ $0 | EDGAR |
| 2026-03-10 | 4 | Ambiq Micro, Inc. (AMBQ) | Grant/award (A): 160,616 @ $0 | EDGAR |
| 2026-02-10 | 4 | Ambiq Micro, Inc. (AMBQ) | Option exercise (M): 53,660 @ $5.88 · Option exercise (M): 53,660 (derivative) @ $0 | EDGAR |
| 2025-10-06 | 4 | Ambiq Micro, Inc. (AMBQ) | Grant/award (A): 159,907 @ $0 | EDGAR |
FilingPulse's Form 4 archive currently extends back to 2024-01-11 and is expanding backward through EDGAR history — earlier filings by this insider may not be indexed yet. Names and roles are shown as filed.
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