NPK International Inc. ($NPKI) Insider Transactions

Last updated: 2026-04-03 19:05 UTC | Total transactions: 149

In the last 12 months, insiders at NPK International Inc. ($NPKI) filed 149 transactions with the SEC: 3 open-market purchases totaling $185,478 and 16 sales totaling $3,580,555. Net insider sentiment: net selling.

NPK International Inc. operates in the Services-miscellaneous equipment rental & leasing industry (Trade & services sector).

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Recent Insider Transactions

Transaction Date Insider Name Title Transaction Type Security Shares Price Shares Owned Following Total Shares Outstanding % of Owned % of Outstanding
April 1, 2026 Piontek Gregg Senior Vice President and CFO S Common Stock 35000 $14.51 899,326.0000 111,669,000 3.75% 0.03%
March 25, 2026 Piontek Gregg Senior Vice President and CFO S Common Stock 15000 $15.03 934,326.0000 111,669,000 1.58% 0.01%
March 16, 2026 Fruge Mary Celeste VP, General Counsel M Common Stock 1000 $4.32 266,213.0000 111,669,000 0.38% 0.00%
March 16, 2026 Fruge Mary Celeste VP, General Counsel M Non-Qualified Stock Option (right to buy) 1000 $0.00 0.0000 111,669,000 100.00% 0.00%
March 16, 2026 Fruge Mary Celeste VP, General Counsel S Common Stock 1000 $13.56 265,213.0000 111,669,000 0.38% 0.00%
March 6, 2026 Fruge Mary Celeste VP, General Counsel M Non-Qualified Stock Option (right to buy) 11193 $0.00 1,000.0000 111,669,000 91.80% 0.01%
March 6, 2026 Fruge Mary Celeste VP, General Counsel S Common Stock 11193 $13.34 265,213.0000 111,669,000 4.05% 0.01%
March 6, 2026 Fruge Mary Celeste VP, General Counsel M Common Stock 11193 $4.32 276,406.0000 111,669,000 4.22% 0.01%
March 4, 2026 Piontek Gregg Senior Vice President and CFO S Common Stock 73590 $14.10 984,326.0000 111,669,000 6.96% 0.07%
March 4, 2026 Piontek Gregg Senior Vice President and CFO M Common Stock 73590 $4.32 1,057,916.0000 111,669,000 7.48% 0.07%
March 4, 2026 Piontek Gregg Senior Vice President and CFO M Non-Qualified Stock Option (right to buy) 73590 $0.00 0.0000 111,669,000 100.00% 0.07%
March 4, 2026 Piontek Gregg Senior Vice President and CFO S Common Stock 35000 $14.02 949,326.0000 111,669,000 3.56% 0.03%
Feb. 23, 2026 Lewis Michael A Director S Common Stock 2013 $14.31 131,333.0000 111,669,000 1.51% 0.00%
June 1, 2025 Fruge Mary Celeste VP, General Counsel M Common Stock 17274 $0.00 265,213.0000 111,669,000 6.97% 0.02%
June 1, 2025 Fruge Mary Celeste VP, General Counsel M Restricted Stock Units 17274 $0.00 17,274.0000 111,669,000 50.00% 0.02%
Nov. 24, 2025 Lewis Michael A Director S Common Stock 2013 $12.00 133,346.0000 111,669,000 1.49% 0.00%
Oct. 3, 2025 LANIGAN MATTHEW President & CEO G Common Stock 770249 $0.00 1,095,913.0000 111,669,000 41.27% 0.69%
Oct. 1, 2025 Briggs Lori VP & President, Ind. Solutions S Common Stock 10108 $11.51 242,513.0000 111,669,000 4.00% 0.01%
Sept. 3, 2025 LANIGAN MATTHEW President & CEO M Non-Qualified Stock Option (right to buy) 1000 $10.38 0.0000 111,669,000 100.00% 0.00%
Sept. 3, 2025 LANIGAN MATTHEW President & CEO S Common Stock 1000 $10.38 1,095,913.0000 111,669,000 0.09% 0.00%
Sept. 3, 2025 LANIGAN MATTHEW President & CEO M Common Stock 1000 $4.32 1,096,913.0000 111,669,000 0.09% 0.00%
Aug. 25, 2025 Lewis Michael A Director S Common Stock 2013 $10.33 135,359.0000 111,669,000 1.47% 0.00%
Aug. 22, 2025 LANIGAN MATTHEW President & CEO M Non-Qualified Stock Option (right to buy) 68896 $10.34 1,000.0000 111,669,000 98.57% 0.06%
Aug. 22, 2025 LANIGAN MATTHEW President & CEO S Common Stock 68896 $10.34 1,095,913.0000 111,669,000 5.91% 0.06%
Aug. 22, 2025 LANIGAN MATTHEW President & CEO M Common Stock 68896 $4.32 1,164,809.0000 111,669,000 6.29% 0.06%
Aug. 11, 2025 Briggs Lori VP & President, Ind. Solutions S Common Stock 8005 $9.51 252,621.0000 111,669,000 3.07% 0.01%
July 9, 2025 Briggs Lori VP & President, Ind. Solutions S Common Stock 8005 $8.57 260,626.0000 111,669,000 2.98% 0.01%
June 16, 2025 Lewis Michael A Director S Common Stock 2013 $8.60 137,372.0000 111,669,000 1.44% 0.00%
June 14, 2025 WHITE DOUGLAS L VP, CAO & Treasurer A Common Stock 730 $6.51 305,245.0000 111,669,000 0.24% 0.00%
June 6, 2025 Briggs Lori VP & President, Ind. Solutions S Common Stock 9704 $8.38 268,631.0000 111,669,000 3.49% 0.01%
June 1, 2025 Briggs Lori VP & President, Ind. Solutions M Restricted Stock Units 24340 $0.00 24,340.0000 111,669,000 50.00% 0.02%
June 1, 2025 WHITE DOUGLAS L VP, CAO & Treasurer M Common Stock 17333 $0.00 305,561.0000 111,669,000 6.01% 0.02%
June 1, 2025 WHITE DOUGLAS L VP, CAO & Treasurer M Common Stock 14667 $0.00 320,228.0000 111,669,000 4.80% 0.01%
June 1, 2025 WHITE DOUGLAS L VP, CAO & Treasurer F Common Stock 3122 $8.09 317,106.0000 111,669,000 0.97% 0.00%
June 1, 2025 WHITE DOUGLAS L VP, CAO & Treasurer F Common Stock 6820 $8.09 310,286.0000 111,669,000 2.15% 0.01%
June 1, 2025 WHITE DOUGLAS L VP, CAO & Treasurer F Common Stock 5771 $8.09 304,515.0000 111,669,000 1.86% 0.01%
June 1, 2025 WHITE DOUGLAS L VP, CAO & Treasurer M Restricted Stock Units 17333 $0.00 29,333.0000 111,669,000 37.14% 0.02%
June 1, 2025 WHITE DOUGLAS L VP, CAO & Treasurer M Restricted Stock Units 14667 $0.00 14,666.0000 111,669,000 50.00% 0.01%
June 1, 2025 Briggs Lori VP & President, Ind. Solutions M Common Stock 26396 $0.00 279,359.0000 111,669,000 10.43% 0.02%
June 1, 2025 Briggs Lori VP & President, Ind. Solutions M Common Stock 24340 $0.00 303,699.0000 111,669,000 8.71% 0.02%
June 1, 2025 Briggs Lori VP & President, Ind. Solutions F Common Stock 5401 $8.09 298,298.0000 111,669,000 1.78% 0.00%
June 1, 2025 Briggs Lori VP & President, Ind. Solutions F Common Stock 9577 $8.09 288,721.0000 111,669,000 3.21% 0.01%
June 1, 2025 Briggs Lori VP & President, Ind. Solutions F Common Stock 10386 $8.09 278,335.0000 111,669,000 3.60% 0.01%
June 1, 2025 Briggs Lori VP & President, Ind. Solutions M Restricted Stock Units 26396 $0.00 48,680.0000 111,669,000 35.16% 0.02%
June 1, 2025 LANIGAN MATTHEW President & CEO M Common Stock 108651 $0.00 1,100,134.0000 111,669,000 10.96% 0.10%
June 1, 2025 LANIGAN MATTHEW President & CEO M Common Stock 100188 $0.00 1,200,322.0000 111,669,000 9.11% 0.09%
June 1, 2025 LANIGAN MATTHEW President & CEO F Common Stock 22232 $8.09 1,178,090.0000 111,669,000 1.85% 0.02%
June 1, 2025 LANIGAN MATTHEW President & CEO F Common Stock 39423 $8.09 1,138,667.0000 111,669,000 3.35% 0.04%
June 1, 2025 LANIGAN MATTHEW President & CEO F Common Stock 42754 $8.09 1,095,913.0000 111,669,000 3.75% 0.04%
June 1, 2025 LANIGAN MATTHEW President & CEO M Restricted Stock Units 108651 $0.00 200,376.0000 111,669,000 35.16% 0.10%
June 1, 2025 LANIGAN MATTHEW President & CEO M Restricted Stock Units 100188 $0.00 100,188.0000 111,669,000 50.00% 0.09%
June 1, 2025 Piontek Gregg Senior Vice President and CFO M Common Stock 43790 $0.00 986,026.0000 111,669,000 4.65% 0.04%
June 1, 2025 Piontek Gregg Senior Vice President and CFO F Common Stock 17231 $8.09 968,795.0000 111,669,000 1.75% 0.02%
June 1, 2025 Piontek Gregg Senior Vice President and CFO F Common Stock 15889 $8.09 952,906.0000 111,669,000 1.64% 0.01%
June 1, 2025 Piontek Gregg Senior Vice President and CFO F Common Stock 8959 $8.09 943,947.0000 111,669,000 0.94% 0.01%
June 1, 2025 Piontek Gregg Senior Vice President and CFO M Common Stock 40379 $0.00 984,326.0000 111,669,000 4.28% 0.04%
June 1, 2025 Piontek Gregg Senior Vice President and CFO M Restricted Stock Units 43790 $0.00 80,758.0000 111,669,000 35.16% 0.04%
June 1, 2025 Piontek Gregg Senior Vice President and CFO M Restricted Stock Units 40379 $0.00 40,379.0000 111,669,000 50.00% 0.04%
June 1, 2025 Fruge Mary Celeste VP, General Counsel F Common Stock 6797 $8.09 258,592.0000 111,669,000 2.56% 0.01%
June 1, 2025 Fruge Mary Celeste VP, General Counsel F Common Stock 6820 $8.09 251,772.0000 111,669,000 2.64% 0.01%
June 1, 2025 Fruge Mary Celeste VP, General Counsel F Common Stock 3833 $8.09 247,939.0000 111,669,000 1.52% 0.00%
June 1, 2025 Fruge Mary Celeste VP, General Counsel M Common Stock 17247 $0.00 265,186.0000 111,669,000 6.96% 0.02%
June 1, 2025 Fruge Mary Celeste VP, General Counsel M Restricted Stock Units 17247 $0.00 17,301.0000 111,669,000 49.92% 0.02%
May 19, 2025 Meer Claudia Michel Director P Common Stock 4000 $7.92 118,135.0000 111,669,000 3.50% 0.00%
May 15, 2025 MINGE JOHN C Director A Common Stock 15097 $0.00 245,384.0000 111,669,000 6.56% 0.01%
May 15, 2025 Meer Claudia Michel Director A Common Stock 15097 $0.00 114,135.0000 111,669,000 15.24% 0.01%
May 15, 2025 LARSON RODERICK A. Director A Common Stock 15097 $0.00 248,748.0000 111,669,000 6.46% 0.01%
May 15, 2025 Lewis Michael A Director A Common Stock 15097 $0.00 139,385.0000 111,669,000 12.15% 0.01%
May 15, 2025 CUTILLO JOSEPH A Director A Common Stock 15097 $0.00 27,597.0000 111,669,000 120.78% 0.01%
May 15, 2025 ROBESON ROSE M Director A Common Stock 18720 $0.00 214,285.0000 111,669,000 9.57% 0.02%
May 15, 2025 Young Donald Win Director A Common Stock 15097 $0.00 310,940.0000 111,669,000 5.10% 0.01%
May 14, 2025 Briggs Lori VP & President, Ind. Solutions A Common Stock 51667 $0.00 252,963.0000 111,669,000 25.67% 0.05%
May 14, 2025 WHITE DOUGLAS L VP, CAO & Treasurer A Common Stock 29900 $0.00 288,228.0000 111,669,000 11.57% 0.03%
May 14, 2025 Piontek Gregg Senior Vice President and CFO A Common Stock 85706 $0.00 942,236.0000 111,669,000 10.01% 0.08%
May 14, 2025 LANIGAN MATTHEW President & CEO A Common Stock 212667 $0.00 991,483.0000 111,669,000 27.31% 0.19%
May 14, 2025 Fruge Mary Celeste VP, General Counsel A Common Stock 39783 $0.00 265,389.0000 111,669,000 17.63% 0.04%
May 8, 2025 CUTILLO JOSEPH A Director P Common Stock 12500 $8.00 12,500.0000 111,669,000 9999.99% 0.01%
March 5, 2025 MINGE JOHN C Director P Common Stock 10000 $5.38 230,287.0000 111,669,000 4.54% 0.01%
Dec. 13, 2024 WHITE DOUGLAS L VP, CAO & Treasurer A Common Stock 722 $6.58 258,328.0000 111,669,000 0.28% 0.00%
Sept. 1, 2024 Briggs Lori VP & President, Ind. Solutions M Common Stock 16666 $0.00 207,854.0000 111,669,000 8.72% 0.01%
Sept. 1, 2024 LANIGAN MATTHEW President & CEO M Restricted Stock Units 33333 $0.00 309,027.0000 111,669,000 9.74% 0.03%
Sept. 1, 2024 Briggs Lori VP & President, Ind. Solutions F Common Stock 6558 $8.23 201,296.0000 111,669,000 3.16% 0.01%
Sept. 1, 2024 LANIGAN MATTHEW President & CEO M Common Stock 33333 $0.00 791,932.0000 111,669,000 4.39% 0.03%
Sept. 1, 2024 Briggs Lori VP & President, Ind. Solutions M Restricted Stock Units 16666 $0.00 75,076.0000 111,669,000 18.17% 0.01%
Sept. 1, 2024 LANIGAN MATTHEW President & CEO F Common Stock 13116 $8.23 778,816.0000 111,669,000 1.66% 0.01%
June 14, 2024 Briggs Lori VP & President, Ind. Solutions A Common Stock 1378 $5.98 191,188.0000 111,669,000 0.73% 0.00%
June 14, 2024 WHITE DOUGLAS L VP, CAO & Treasurer A Common Stock 841 $5.98 257,606.0000 111,669,000 0.33% 0.00%
June 1, 2024 LANIGAN MATTHEW President & CEO F Common Stock 39424 $8.48 815,947.0000 111,669,000 4.61% 0.04%
June 1, 2024 LANIGAN MATTHEW President & CEO F Common Stock 42754 $8.48 773,193.0000 111,669,000 5.24% 0.04%
June 1, 2024 LANIGAN MATTHEW President & CEO F Common Stock 14594 $8.48 758,599.0000 111,669,000 1.89% 0.01%
June 1, 2024 LANIGAN MATTHEW President & CEO M Restricted Stock Units 37090 $0.00 551,200.0000 111,669,000 6.30% 0.03%
June 1, 2024 LANIGAN MATTHEW President & CEO M Restricted Stock Units 108651 $0.00 442,549.0000 111,669,000 19.71% 0.10%
June 1, 2024 LANIGAN MATTHEW President & CEO M Restricted Stock Units 100189 $0.00 342,360.0000 111,669,000 22.64% 0.09%
June 1, 2024 Fruge Mary Celeste VP, General Counsel M Common Stock 17274 $0.00 245,519.0000 111,669,000 7.57% 0.02%
June 1, 2024 Fruge Mary Celeste VP, General Counsel F Common Stock 6820 $8.48 238,699.0000 111,669,000 2.78% 0.01%
June 1, 2024 Fruge Mary Celeste VP, General Counsel F Common Stock 6797 $8.48 231,902.0000 111,669,000 2.85% 0.01%
June 1, 2024 Piontek Gregg Senior Vice President and CFO M Restricted Stock Units 51181 $0.00 208,718.0000 111,669,000 19.69% 0.05%
June 1, 2024 Fruge Mary Celeste VP, General Counsel M Restricted Stock Units 17274 $0.00 34,548.0000 111,669,000 33.33% 0.02%
June 1, 2024 Briggs Lori VP & President, Ind. Solutions M Common Stock 16000 $0.00 165,333.0000 111,669,000 10.71% 0.01%
June 1, 2024 Briggs Lori VP & President, Ind. Solutions M Common Stock 26396 $0.00 191,729.0000 111,669,000 15.97% 0.02%
June 1, 2024 Briggs Lori VP & President, Ind. Solutions M Common Stock 24341 $0.00 216,070.0000 111,669,000 12.70% 0.02%
June 1, 2024 Briggs Lori VP & President, Ind. Solutions F Common Stock 9578 $8.48 206,492.0000 111,669,000 4.43% 0.01%
June 1, 2024 Briggs Lori VP & President, Ind. Solutions F Common Stock 6296 $8.48 200,196.0000 111,669,000 3.05% 0.01%
June 1, 2024 Briggs Lori VP & President, Ind. Solutions F Common Stock 10386 $8.48 189,810.0000 111,669,000 5.19% 0.01%
June 1, 2024 Briggs Lori VP & President, Ind. Solutions M Restricted Stock Units 16000 $0.00 142,479.0000 111,669,000 10.10% 0.01%
June 1, 2024 Briggs Lori VP & President, Ind. Solutions M Restricted Stock Units 26396 $0.00 116,083.0000 111,669,000 18.53% 0.02%
June 1, 2024 Briggs Lori VP & President, Ind. Solutions M Restricted Stock Units 24341 $0.00 91,742.0000 111,669,000 20.97% 0.02%
June 1, 2024 Piontek Gregg Senior Vice President and CFO M Common Stock 51181 $0.00 825,619.0000 111,669,000 6.61% 0.05%
June 1, 2024 Fruge Mary Celeste VP, General Counsel F Common Stock 6296 $8.48 225,606.0000 111,669,000 2.71% 0.01%
June 1, 2024 Piontek Gregg Senior Vice President and CFO M Restricted Stock Units 43790 $0.00 164,928.0000 111,669,000 20.98% 0.04%
June 1, 2024 Piontek Gregg Senior Vice President and CFO M Restricted Stock Units 40380 $0.00 124,548.0000 111,669,000 24.48% 0.04%
June 1, 2024 PATERSON DAVID A VP & President, Fluids Systems M Common Stock 35788 $0.00 351,567.0000 111,669,000 11.33% 0.03%
June 1, 2024 PATERSON DAVID A VP & President, Fluids Systems M Common Stock 30620 $0.00 382,187.0000 111,669,000 8.71% 0.03%
June 1, 2024 PATERSON DAVID A VP & President, Fluids Systems M Common Stock 28235 $0.00 410,422.0000 111,669,000 7.39% 0.03%
June 1, 2024 PATERSON DAVID A VP & President, Fluids Systems F Common Stock 7455 $8.48 402,967.0000 111,669,000 1.82% 0.01%
June 1, 2024 PATERSON DAVID A VP & President, Fluids Systems F Common Stock 8714 $8.48 394,253.0000 111,669,000 2.16% 0.01%
June 1, 2024 PATERSON DAVID A VP & President, Fluids Systems F Common Stock 8008 $8.48 386,245.0000 111,669,000 2.03% 0.01%
June 1, 2024 PATERSON DAVID A VP & President, Fluids Systems M Restricted Stock Units 35788 $0.00 133,770.0000 111,669,000 21.11% 0.03%
June 1, 2024 PATERSON DAVID A VP & President, Fluids Systems M Restricted Stock Units 30620 $0.00 103,150.0000 111,669,000 22.89% 0.03%
June 1, 2024 PATERSON DAVID A VP & President, Fluids Systems M Restricted Stock Units 28235 $0.00 74,915.0000 111,669,000 27.37% 0.03%
June 1, 2024 WHITE DOUGLAS L VP, CAO & Treasurer M Common Stock 18666 $0.00 237,101.0000 111,669,000 8.55% 0.02%
June 1, 2024 WHITE DOUGLAS L VP, CAO & Treasurer M Common Stock 17333 $0.00 254,434.0000 111,669,000 7.31% 0.02%
June 1, 2024 WHITE DOUGLAS L VP, CAO & Treasurer M Common Stock 14667 $0.00 269,101.0000 111,669,000 5.76% 0.01%
June 1, 2024 WHITE DOUGLAS L VP, CAO & Treasurer F Common Stock 3571 $8.48 265,530.0000 111,669,000 1.33% 0.00%
June 1, 2024 WHITE DOUGLAS L VP, CAO & Treasurer F Common Stock 4220 $8.48 261,310.0000 111,669,000 1.59% 0.00%
June 1, 2024 WHITE DOUGLAS L VP, CAO & Treasurer F Common Stock 4545 $8.48 256,765.0000 111,669,000 1.74% 0.00%
June 1, 2024 WHITE DOUGLAS L VP, CAO & Treasurer M Restricted Stock Units 18666 $0.00 78,666.0000 111,669,000 19.18% 0.02%
June 1, 2024 WHITE DOUGLAS L VP, CAO & Treasurer M Restricted Stock Units 17333 $0.00 61,333.0000 111,669,000 22.03% 0.02%
June 1, 2024 WHITE DOUGLAS L VP, CAO & Treasurer M Restricted Stock Units 14667 $0.00 46,666.0000 111,669,000 23.91% 0.01%
June 1, 2024 LANIGAN MATTHEW President & CEO M Common Stock 37090 $0.00 646,531.0000 111,669,000 6.09% 0.03%
June 1, 2024 LANIGAN MATTHEW President & CEO M Common Stock 108651 $0.00 755,182.0000 111,669,000 16.81% 0.10%
June 1, 2024 LANIGAN MATTHEW President & CEO M Common Stock 100189 $0.00 855,371.0000 111,669,000 13.27% 0.09%
June 1, 2024 Piontek Gregg Senior Vice President and CFO M Common Stock 43790 $0.00 869,409.0000 111,669,000 5.30% 0.04%
June 1, 2024 Piontek Gregg Senior Vice President and CFO M Common Stock 40380 $0.00 909,789.0000 111,669,000 4.64% 0.04%
June 1, 2024 Piontek Gregg Senior Vice President and CFO F Common Stock 15889 $8.48 893,900.0000 111,669,000 1.75% 0.01%
June 1, 2024 Piontek Gregg Senior Vice President and CFO F Common Stock 17231 $8.48 876,669.0000 111,669,000 1.93% 0.02%
June 1, 2024 Piontek Gregg Senior Vice President and CFO F Common Stock 20139 $8.48 856,530.0000 111,669,000 2.30% 0.02%
May 16, 2024 LARSON RODERICK A. Director A Common Stock 16108 $0.00 233,651.0000 111,669,000 7.40% 0.01%
May 16, 2024 Lewis Michael A Director A Common Stock 16108 $0.00 124,288.0000 111,669,000 14.89% 0.01%
May 16, 2024 Meer Claudia Michel Director A Common Stock 16108 $0.00 99,038.0000 111,669,000 19.42% 0.01%
May 16, 2024 MINGE JOHN C Director A Common Stock 16108 $0.00 220,287.0000 111,669,000 7.89% 0.01%
May 16, 2024 ROBESON ROSE M Director A Common Stock 19974 $0.00 195,565.0000 111,669,000 11.38% 0.02%
May 16, 2024 Young Donald Win Director A Common Stock 16108 $0.00 295,843.0000 111,669,000 5.76% 0.01%
May 15, 2024 Piontek Gregg Senior Vice President and CFO A Common Stock 68308 $0.00 774,438.0000 111,669,000 9.67% 0.06%
May 15, 2024 Briggs Lori VP & President, Ind. Solutions A Common Stock 41178 $0.00 149,333.0000 111,669,000 38.07% 0.04%
May 15, 2024 Fruge Mary Celeste VP, General Counsel A Common Stock 29223 $0.00 228,245.0000 111,669,000 14.68% 0.03%
May 15, 2024 LANIGAN MATTHEW President & CEO A Common Stock 169496 $0.00 609,441.0000 111,669,000 38.53% 0.15%
May 15, 2024 PATERSON DAVID A VP & President, Fluids Systems A Common Stock 47767 $0.00 315,779.0000 111,669,000 17.82% 0.04%
May 15, 2024 WHITE DOUGLAS L VP, CAO & Treasurer A Common Stock 23800 $0.00 218,435.0000 111,669,000 12.23% 0.02%