ZHANG KER — SEC Form 4 filings
SEC reporting owner CIK 1266870. 4 Form 4 filings on record with FilingPulse; latest filed 2026-09-15.
Transaction summary — filings shown
Covers all 4 filings on record, filed 2025-07-31 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): 3 legs across 2 filings — 10,185 shares, $644,891 total (shares × price as filed).
- Other reported legs (grants, option exercises, tax withholding, gifts, derivative-security transactions, …): 4.
- Largest priced transaction: sale of 9,100 shares @ $63.39 ($576,809) in Ambiq Micro, Inc., filed 2026-09-15.
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) | Director | 4 | — | 3 legs · 10,185 sh · $644,891 | 4 |
Form 4 filings — ZHANG KER
| Filed | Form | Issuer | Reported transactions | Source |
|---|---|---|---|---|
| 2026-09-15 | 4 | Ambiq Micro, Inc. (AMBQ) | Sale (S): 9,100 @ $63.39 · Sale (S): 900 @ $63.95 | EDGAR |
| 2026-09-09 | 4 | Ambiq Micro, Inc. (AMBQ) | Option exercise (M): 1,785 @ $5.88 · Sale (S): 185 @ $56.92 · Option exercise (M): 1,785 (derivative) @ $0 | EDGAR |
| 2026-06-10 | 4 | Ambiq Micro, Inc. (AMBQ) | Grant/award (A): 4,957 @ $0 | EDGAR |
| 2025-07-31 | 4 | Ambiq Micro, Inc. (AMBQ) | Grant/award (A): 23,809 @ $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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