Duff Mark

Director · Officer · PESI

As of 2026-09-16, Duff Mark has 8 Form 4 transactions on record across 1 company — 0 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: $2.4MIndirect: $0$2.4Mas of 2026-09-16
  • Direct $2.4M
  • Indirect $0
PESIdirect133,659 sh$2.4M

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

PESI · 8 trades
2025-03-21: Purchase, 750 sh ($5K)2025-03-21: Purchase, 650 sh ($5K)2025-03-21: Purchase, 650 sh ($5K)2025-03-18: Purchase, 500 sh ($4K)2025-03-18: Purchase, 500 sh ($4K)2025-01-08: Option exercise, 25,000 sh ($79K)2025-01-08: Withheld for tax, 7,443 sh ($79K)2025-01-08: Option exercise, 25,000 sh ($0)

Filing ledger

DateCompanyActionShares @ priceValueOwnership ΔOwned afterFiling
2025-03-21PESIPurchase750 @ $7.02$5K+0.6% of holding132,359Form 4
2025-03-21PESIPurchase650 @ $7.05$5K+0.5% of holding133,659Form 4
2025-03-21PESIPurchase650 @ $7.03$5K+0.5% of holding133,009Form 4
2025-03-18PESIPurchase500 @ $7.20$4K+0.4% of holding131,609Form 4
2025-03-18PESIPurchase500 @ $7.10$4K+0.4% of holding131,109Form 4
3 award / exercise / gift records — not counted as purchases
DateCompanyActionSharesOwned afterFiling
2025-01-08PESIOption exercise25,000138,052Form 4
2025-01-08PESIWithheld for tax7,443130,609Form 4
2025-01-08PESIOption exercise25,0000Form 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.