NPK International, Inc. is a temporary worksite access solutions company that manufactures, sells, and rents recyclable composite matting products, along with a full suite of services, including planning, logistics, and site restoration. It delivers superior quality and reliability across critical infrastructure markets, including electrical transmission and distribution, oil and gas exploration, pipeline, renewable energy, petrochemical, construction, and other industries. The company was founded in 1932 and is headquartered in The Woodlands, TX. |  |
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| Insider Trading |
Relationship |
Date |
Transaction |
Cost |
#Shares |
Value ($) |
#Shares Total |
SEC Form 4 |
| Lewis Michael A | Director | Nov 24 '25 | Sale | 12.00 | 2,013 | 24,156 | 133,346 | Nov 25 05:25 PM | | MICHAEL LEWIS | Director | Nov 24 '25 | Proposed Sale | 11.52 | 4,026 | 46,380 | | Nov 24 04:21 PM | | Briggs Lori | VP & President, Ind. Solutions | Oct 01 '25 | Sale | 11.51 | 10,108 | 116,352 | 242,513 | Oct 03 04:19 PM | | LORI BRIGGS | Officer | Oct 01 '25 | Proposed Sale | 11.31 | 10,108 | 114,321 | | Oct 01 04:28 PM | | LANIGAN MATTHEW | President & CEO | Sep 03 '25 | Option Exercise | 4.32 | 1,000 | 4,320 | 1,096,913 | Sep 04 07:31 PM | | LANIGAN MATTHEW | President & CEO | Sep 03 '25 | Sale | 10.38 | 1,000 | 10,380 | 1,095,913 | Sep 04 07:31 PM | | Lewis Michael A | Director | Aug 25 '25 | Sale | 10.33 | 2,013 | 20,797 | 135,359 | Aug 26 05:22 PM | | LANIGAN MATTHEW | President & CEO | Aug 22 '25 | Option Exercise | 4.32 | 68,896 | 297,631 | 1,164,809 | Aug 26 05:22 PM | | LANIGAN MATTHEW | President & CEO | Aug 22 '25 | Sale | 10.34 | 68,896 | 712,536 | 1,095,913 | Aug 26 05:22 PM | | MATTHEW LANIGAN | Director | Aug 22 '25 | Proposed Sale | 10.00 | 69,896 | 698,960 | | Aug 22 04:43 PM | | Briggs Lori | VP & President, Ind. Solutions | Aug 11 '25 | Sale | 9.51 | 8,005 | 76,148 | 252,621 | Aug 12 06:32 PM | | Briggs Lori | VP & President, Ind. Solutions | Jul 09 '25 | Sale | 8.57 | 8,005 | 68,584 | 260,626 | Jul 10 04:12 PM | | Lewis Michael A | Director | Jun 16 '25 | Sale | 8.60 | 2,013 | 17,315 | 137,372 | Jun 17 05:37 PM | | MICHAEL LEWIS | Director | Jun 16 '25 | Proposed Sale | 8.39 | 4,026 | 33,778 | | Jun 16 04:34 PM | | Briggs Lori | VP & President, Ind. Solutions | Jun 06 '25 | Sale | 8.38 | 9,704 | 81,324 | 268,631 | Jun 10 05:51 PM | | LORI A BRIGGS | Officer | Jun 06 '25 | Proposed Sale | 8.36 | 25,714 | 214,969 | | Jun 06 04:22 PM | | WHITE DOUGLAS L | VP, CAO & Treasurer | Jun 01 '25 | Option Exercise | 0.00 | 32,000 | 0 | 320,228 | Jun 03 06:22 PM | | Briggs Lori | VP & President, Ind. Solutions | Jun 01 '25 | Option Exercise | 0.00 | 50,736 | 0 | 303,699 | Jun 03 06:21 PM | | LANIGAN MATTHEW | President & CEO | Jun 01 '25 | Option Exercise | 0.00 | 208,839 | 0 | 1,200,322 | Jun 03 06:21 PM | | Piontek Gregg | Senior Vice President and CFO | Jun 01 '25 | Option Exercise | 0.00 | 84,169 | 0 | 921,026 | Jun 03 06:21 PM | | Fruge Mary Celeste | VP, General Counsel | Jun 01 '25 | Option Exercise | 0.00 | 17,247 | 0 | 265,186 | Jun 03 06:21 PM | | Meer Claudia Michel | Director | May 19 '25 | Buy | 7.92 | 4,000 | 31,680 | 118,135 | May 20 04:17 PM | | CUTILLO JOSEPH A | Director | May 08 '25 | Buy | 8.00 | 12,500 | 99,998 | 12,500 | May 08 05:36 PM | | MINGE JOHN C | Director | Mar 05 '25 | Buy | 5.38 | 10,000 | 53,800 | 230,287 | Mar 06 05:31 PM |
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