Piontek Gregg

Officer · NPKI

As of 2026-09-16, Piontek Gregg has 21 Form 4 transactions on record across 1 company — 13 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.

Trades by company

NPKI · 21 trades
2026-06-01: Withheld for tax, 15,889 sh ($227K)2026-06-01: Withheld for tax, 11,241 sh ($161K)2026-06-01: Withheld for tax, 8,959 sh ($128K)2026-06-01: Option exercise, 40,379 sh ($0)2026-06-01: Option exercise, 40,379 sh ($0)2026-05-19: Award / grant, 34,566 sh ($0)2026-04-09: Sale, 15,000 sh ($226K)2026-04-01: Sale, 35,000 sh ($508K)2026-03-25: Sale, 15,000 sh ($225K)2026-03-04: Sale, 73,590 sh ($1.0M)2026-03-04: Sale, 35,000 sh ($491K)2026-03-04: Option exercise, 73,590 sh ($318K)2026-03-04: Option exercise, 73,590 sh ($0)2025-06-01: Withheld for tax, 17,231 sh ($139K)2025-06-01: Withheld for tax, 15,889 sh ($129K)2025-06-01: Withheld for tax, 8,959 sh ($72K)2025-06-01: Option exercise, 40,379 sh ($0)2025-06-01: Option exercise, 43,790 sh ($0)2025-06-01: Option exercise, 40,379 sh ($0)2025-06-01: Option exercise, 43,790 sh ($0)2025-05-14: Award / grant, 85,706 sh ($0)

Filing ledger

DateCompanyActionShares @ priceValueOwnership ΔOwned afterFiling
2026-04-09NPKISale15,000 @ $15.04$226K−1.8% of holding819,326Form 4
2026-04-01NPKISale35,000 @ $14.51$508K−4.0% of holding834,326Form 4
2026-03-25NPKISale15,000 @ $15.03$225K−1.7% of holding869,326Form 4
2026-03-04NPKISale73,590 @ $14.10$1.0M−7.4% of holding919,326Form 4
2026-03-04NPKISale35,000 @ $14.02$491K−3.8% of holding884,326Form 4
16 award / exercise / gift records — not counted as purchases
DateCompanyActionSharesOwned afterFiling
2026-06-01NPKIWithheld for tax15,889829,044Form 4
2026-06-01NPKIWithheld for tax11,241817,803Form 4
2026-06-01NPKIWithheld for tax8,959844,933Form 4
2026-06-01NPKIOption exercise40,3790Form 4
2026-06-01NPKIOption exercise40,379858,182Form 4
2026-05-19NPKIAward / grant34,566853,892Form 4
2026-03-04NPKIOption exercise73,590992,916Form 4
2026-03-04NPKIOption exercise73,5900Form 4
2025-06-01NPKIWithheld for tax17,231903,795Form 4
2025-06-01NPKIWithheld for tax15,889887,906Form 4
2025-06-01NPKIWithheld for tax8,959878,947Form 4
2025-06-01NPKIOption exercise40,379919,326Form 4
2025-06-01NPKIOption exercise43,790921,026Form 4
2025-06-01NPKIOption exercise40,37940,379Form 4
2025-06-01NPKIOption exercise43,79080,758Form 4
2025-05-14NPKIAward / grant85,706877,236Form 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.