ZHANG KER

Director · AMBQ

As of 2026-09-16, ZHANG KER has 7 Form 4 transactions on record across 1 company — 6 in the trailing 12 months.

Everything this person has disclosed to the SEC on Form 4 — across every company they file for — reconstructed from the public record. A filing history, not a tip sheet.

Reconstructed holdings

Direct: $1.2MIndirect: $0$1.2Mas of 2026-09-16
  • Direct $1.2M
  • Indirect $0
AMBQdirect20,366 sh$1.2M

Reconstructed from this person's own Form 4 filings — the total each filing reported owning afterward, priced at the close on the as-of date shown. A filed position can lag the real one.

Direct and indirect holdings (e.g. through a trust or fund) are tagged separately, as filed.

Trades by company

AMBQ · 7 trades
2026-09-11: Sale, 9,100 sh ($577K)2026-09-11: Sale, 900 sh ($58K)2026-09-04: Sale, 185 sh ($11K)2026-09-04: Option exercise, 1,785 sh ($10K)2026-09-04: Option exercise, 1,785 sh ($0)2026-06-08: Award / grant, 4,957 sh ($0)2025-07-29: Award / grant, 23,809 sh ($0)

Filing ledger

DateCompanyActionShares @ priceValueOwnership ΔOwned afterFiling
2026-09-11AMBQSale9,100 @ $63.39$577K−30.0% of holding21,266Form 4
2026-09-11AMBQSale900 @ $63.95$58K−4.2% of holding20,366Form 4
2026-09-04AMBQSale185 @ $56.92$11K−0.6% of holding30,366Form 4
4 award / exercise / gift records — not counted as purchases
DateCompanyActionSharesOwned afterFiling
2026-09-04AMBQOption exercise1,78530,551Form 4
2026-09-04AMBQOption exercise1,7850Form 4
2026-06-08AMBQAward / grant4,95728,766Form 4
2025-07-29AMBQAward / grant23,80923,809Form 4

Source: SEC Form 4 filings. Each row links to its original filing.

Research tool, not investment advice — historical frequencies, not recommendations. A product of Marovel Technologies LLC. Full terms.