NPK International Inc. (NPKI) Insider Ownership

Historic Insider Ownership Trends

Top Direct Holders

Insider ownership data is derived from the last 60 months of Form 4 SEC filings.
Holder Position Shares (Direct) Shares (Indirect) Report Date
Paul L Howes President Ceo 1,236,325 0 27 Aug, 2021
Anthony James Best - 237,809 0 20 May, 2022
Gregg Piontek Senior Vice President And Cfo 819,326 0 10 Apr, 2026
Michael A Lewis - 131,333 0 25 Feb, 2026
Roderick A. Larson - 15,097 0 19 May, 2025
Edward Chipman Earle Vp, General Counsel, Cao 230,265 0 16 Dec, 2022
Douglas L White Vp, Cao Treasurer 305,245 0 17 Jun, 2025
Joseph A Cutillo - 27,597 0 19 May, 2025
Matthew Lanigan President Ceo 325,664 0 06 Oct, 2025
John C Minge - 245,384 0 19 May, 2025
David A Paterson Vp President, Fluids Systems 386,245 0 04 Jun, 2024
Claudia Michel Meer - 118,135 0 20 May, 2025
Lori Briggs Vp President, Ind. Solutions 242,513 0 03 Oct, 2025
Donald Win Young - 310,940 0 19 May, 2025
Mary Celeste Fruge Vp, General Counsel 265,213 0 18 Mar, 2026

* Please note that the shares above only reflect shares from the fund portfolio and the institutional portfolio. Shares from the personal portfolio are excluded from this Institutional Ownership Page. See these insiders' latest transactions here on Insider Page.

Recent Insider Transactions

Detailed insider trading activity based on Form 4 SEC filings.
Download Data
Transaction Date Insider Name Security Class Transaction Type Shares Traded Price Shares Remaining Ownership Code
09 Apr, 2026 Gregg Piontek Common Stock D 15,000 $15.05 819,326 D S
09 Apr, 2026 Gregg Piontek Common Stock D 15,000 $15.05 819,326 D S
01 Apr, 2026 Gregg Piontek Common Stock D 35,000 $14.51 834,326 D S
01 Apr, 2026 Gregg Piontek Common Stock D 35,000 $14.51 834,326 D S
01 Apr, 2026 Gregg Piontek Common Stock D 35,000 $14.51 834,326 D S
25 Mar, 2026 Gregg Piontek Common Stock D 15,000 $15.03 869,326 D S
25 Mar, 2026 Gregg Piontek Common Stock D 15,000 $15.03 869,326 D S
25 Mar, 2026 Gregg Piontek Common Stock D 15,000 $15.03 869,326 D S
16 Mar, 2026 Mary Celeste Fruge Common Stock A 1,000 $4.32 266,213 D M
16 Mar, 2026 Mary Celeste Fruge Common Stock D 1,000 $13.56 265,213 D S
16 Mar, 2026 Mary Celeste Fruge Non-Qualified Stock Option (right to buy) D 1,000 $0.00 0 D M
06 Mar, 2026 Mary Celeste Fruge Common Stock A 11,193 $4.32 276,406 D M
06 Mar, 2026 Mary Celeste Fruge Common Stock D 11,193 $13.34 265,213 D S
06 Mar, 2026 Mary Celeste Fruge Non-Qualified Stock Option (right to buy) D 11,193 $0.00 1,000 D M
04 Mar, 2026 Gregg Piontek Common Stock A 73,590 $4.32 992,916 D M
04 Mar, 2026 Gregg Piontek Common Stock A 73,590 $4.32 992,916 D M
04 Mar, 2026 Gregg Piontek Common Stock A 73,590 $4.32 992,916 D M
04 Mar, 2026 Gregg Piontek Common Stock D 73,590 $14.10 919,326 D S
04 Mar, 2026 Gregg Piontek Common Stock D 73,590 $14.10 919,326 D S
04 Mar, 2026 Gregg Piontek Common Stock D 73,590 $14.10 919,326 D S