Hamm Christopher W.

Director · AMPY

As of 2026-09-16, Hamm Christopher W. has 8 Form 4 transactions on record across 1 company — 4 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: $1.5MIndirect: $0$1.5Mas of 2026-09-16
  • Direct $1.5M
  • Indirect $0
AMPYdirect323,121 sh$1.5M

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

AMPY · 8 trades
2026-07-01: Option exercise, 51,043 sh ($0)2026-07-01: Award / grant, 43,911 sh ($0)2026-07-01: Option exercise, 51,043 sh2026-07-01: Option exercise, 51,043 sh2025-07-01: Award / grant, 51,043 sh ($0)2025-07-01: Option exercise, 27,531 sh ($0)2025-07-01: Option exercise, 27,531 sh2025-06-18: Purchase, 77,176 sh ($283K)

Filing ledger

DateCompanyActionShares @ priceValueOwnership ΔOwned afterFiling
2025-06-18AMPYPurchase77,176 @ $3.67$283K+46.1% of holding244,547Form 4
7 award / exercise / gift records — not counted as purchases
DateCompanyActionSharesOwned afterFiling
2026-07-01AMPYOption exercise51,0430Form 4
2026-07-01AMPYAward / grant43,91143,911Form 4
2026-07-01AMPYOption exercise51,043323,121Form 4
2026-07-01AMPYOption exercise51,043323,121Form 4
2025-07-01AMPYAward / grant51,04351,043Form 4
2025-07-01AMPYOption exercise27,5310Form 4
2025-07-01AMPYOption exercise27,531272,078Form 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.