Stepien Thomas M

Director · Officer · AMPX

As of 2026-09-16, Stepien Thomas M has 16 Form 4 transactions on record across 1 company — 15 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: $5.3MIndirect: $339K$5.6Mas of 2026-09-16
  • Direct $5.3M
  • Indirect $339K
AMPXdirect578,750 sh$5.3M
AMPXindirect37,260 sh$339K

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

AMPX · 16 trades
2026-08-25: Gift, 5,000 sh ($0)2026-08-25: Award / grant, 346 sh ($0)2026-08-25: Gift, 346 sh ($0)2026-08-25: Gift, 5,000 sh ($0)2026-08-25: Gift, 5,000 sh ($0)2026-08-24: Sale, 8,000 sh ($80K)2026-08-21: Sale, 23,529 sh ($243K)2026-06-04: Sale, 2,000 sh ($42K)2026-06-04: Gift, 36,914 sh ($0)2026-06-04: Gift, 36,914 sh ($0)2026-06-04: Gift, 30,384 sh ($0)2026-05-27: Sale, 4,375 sh ($75K)2026-05-21: Sale, 60,702 sh ($898K)2026-03-04: Award / grant, 150,000 sh ($0)2025-12-19: Award / grant, 200,000 sh ($0)2025-05-01: Award / grant, 400,000 sh ($0)

Filing ledger

DateCompanyActionShares @ priceValueOwnership ΔOwned afterFiling
2026-08-24AMPXSale8,000 @ $10.03$80K−1.3% of holding594,096Form 4
2026-08-21AMPXSale23,529 @ $10.34$243K−3.8% of holding602,096Form 4
2026-06-04AMPXSale2,000 @ $20.97$42K−0.3% of holding625,625Form 4
2026-05-27AMPXSale4,375 @ $17.19$75K−0.6% of holding694,923Form 4
2026-05-21AMPXSale60,702 @ $14.79$898K−8.0% of holding699,298Form 4
11 award / exercise / gift records — not counted as purchases
DateCompanyActionSharesOwned afterFiling
2026-08-25AMPXGift5,000579,096Form 4
2026-08-25AMPXAward / grant34637,260Form 4
2026-08-25AMPXGift346578,750Form 4
2026-08-25AMPXGift5,000584,096Form 4
2026-08-25AMPXGift5,000589,096Form 4
2026-06-04AMPXGift36,91436,914Form 4
2026-06-04AMPXGift36,914627,625Form 4
2026-06-04AMPXGift30,384664,539Form 4
2026-03-04AMPXAward / grant150,000760,000Form 4
2025-12-19AMPXAward / grant200,000610,000Form 4
2025-05-01AMPXAward / grant400,000400,000Form 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.