HSIEH Wen Hsuan

Director · AMBQ, AMPX, DM

As of 2026-09-16, HSIEH Wen Hsuan has 17 Form 4 transactions on record across 3 companies — 7 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: $297KIndirect: $0$297Kas of 2026-09-16
  • Direct $297K
  • Indirect $0
AMBQdirect4,957 sh$297K

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 · 6 trades
2026-06-08: Award / grant, 4,957 sh ($0)2026-02-18: Option exercise, 238,931 sh ($3.0M)2026-02-18: Option exercise, 238,931 sh ($0)2025-07-31: Conversion, 394,989 sh ($0)2025-07-31: Conversion, 394,989 sh2025-07-31: Conversion, 394,989 sh
DM · 6 trades
2025-04-02: Option exercise, 28,571 sh2025-04-02: Option exercise, 28,571 sh2025-04-02: Option exercise, 28,571 sh2025-04-02: Disposition, 42,538 sh2025-04-02: Option exercise, 28,571 sh2025-04-02: Disposition, 42,538 sh
AMPX · 5 trades
2026-03-12: Sale, 282,500 sh ($5.2M)2026-03-12: Sale, 130,646 sh ($2.4M)2026-03-12: Option exercise, 270,251 sh ($705K)2026-03-12: Option exercise, 270,251 sh ($705K)2025-06-13: Award / grant, 44,444 sh ($0)

Filing ledger

DateCompanyActionShares @ priceValueOwnership ΔOwned afterFiling
2026-03-12AMPXSale282,500 @ $18.55$5.2M−61.7% of holding175,090Form 4
2026-03-12AMPXSale130,646 @ $18.22$2.4M−74.6% of holding44,444Form 4
15 award / exercise / gift records — not counted as purchases
DateCompanyActionSharesOwned afterFiling
2026-06-08AMBQAward / grant4,9574,957Form 4
2026-03-12AMPXOption exercise270,2510Form 4
2026-03-12AMPXOption exercise270,251457,590Form 4
2026-02-18AMBQOption exercise238,931633,920Form 4
2026-02-18AMBQOption exercise238,9310Form 4
2025-07-31AMBQConversion394,9890Form 4
2025-07-31AMBQConversion394,989394,989Form 4
2025-07-31AMBQConversion394,989394,989Form 4
2025-06-13AMPXAward / grant44,444187,339Form 4
2025-04-02DMOption exercise28,57142,538Form 4
2025-04-02DMOption exercise28,5710Form 4
2025-04-02DMOption exercise28,57142,538Form 4
2025-04-02DMDisposition42,5380Form 4
2025-04-02DMOption exercise28,5710Form 4
2025-04-02DMDisposition42,5380Form 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.