| Howes Paul LPresident & CEO, Director · 219 transactions | — | 1.26M†as of Aug 2021 | 3.14M | 127.5K | 1.17M |
| Lanigan MatthewPresident & CEO, Director · 77 transactions | — | 1.02M† | 1.79M | 19.0K | 297.0K |
| Cole James DChief Executive Officer, Director · 2 transactions | — | 965.4K†as of Apr 2006 | — | — | — |
| Kaufman Alan JDirector · 1 transaction | — | 931.9K†as of Dec 2006 | — | — | 45.0K |
| Piontek GreggSenior Vice President and CFO · 127 transactions | — | 882.8K† | 1.52M | 69.0K | 299.3K |
| Smith Bruce CampbellExec Vice President & Chief · 117 transactions | — | 397.3Kas of Jul 2019 | 892.6K | — | 340.6K |
| Airola Mark JSr Vice Pres, General Counsel · 57 transactions | — | 387.9Kas of Aug 2018 | 815.8K | 20.0K | 274.8K |
| Paterson David AVP & President, Fluids Systems, VP & President, Fluids Systems · 23 transactions | — | 351.6Kas of Jun 2024 | 494.1K | — | — |
| Young Donald WinDirector · 12 transactions | — | 310.9Kas of May 2025 | 99.8K | 211.1K | — |
| White Douglas LVP, CAO & Treasurer · 79 transactions | — | 305.2Kas of Jun 2025 | 373.2K | — | 6.1K |
| Finley G StephenDirector · 36 transactions | — | 275.5Kas of May 2021 | 301.4K | 5.0K | 40.9K |
| Fruge Mary CelesteVP, General Counsel · 21 transactions | — | 267.4K | 155.0K | — | 12.2K |
| Larson Roderick A.Director · 13 transactions | — | 257.3K† | 291.6K | — | — |
| Minge John CDirector · 16 transactions | — | 253.9K | 207.6K | 46.3K | — |
| Briggs LoriVP & President, Ind. Solutions · 50 transactions | — | 247.2K | 402.4K | — | 54.6K |
| Best Anthony JamesDirector · 9 transactions | — | 237.8Kas of May 2022 | 237.8K | — | — |
| Earle Edward ChipmanVP, General Counsel, CAO · 17 transactions | — | 230.3Kas of Dec 2022 | 251.0K | 22.5K | — |
| McFarland JamesDirector · 20 transactions | — | 228.7Kas of Dec 2016 | 207.9K | 30.0K | — |
| Warren Gary LDirector · 14 transactions | — | 226.7Kas of May 2018 | 236.1K | — | — |
| Robeson Rose MDirector · 9 transactions | — | 225.1K | 225.1K | — | — |
| Juergens Jeffery LVP & Pres of NMIS · 20 transactions | — | 219.4Kas of Dec 2015 | 295.5K | — | — |
| Anderson David CDirector · 57 transactions | — | 150.8Kas of May 2018 | 243.4K | 20.0K | 99.4K |
| Braun James EVice President and CFO · 21 transactions | — | 144.0Kas of Jun 2011 | 168.8K | 10.0K | 10.0K |
| Lewis Michael ADirector · 12 transactions | — | 137.9K | 142.7K | 5.3K | 10.1K |
| Meer Claudia MichelDirector · 10 transactions | — | 126.7K | 108.4K | 18.3K | — |
| Box JerryDirector · 51 transactions | — | 125.0Kas of Apr 2014 | 170.0K | 10.0K | 68.1K |
| Moss William DVice President · 7 transactions | — | 75.9Kas of Jun 2011 | 84.0K | — | 500 |
| Kendrick Lee AnnVice President, HR · 19 transactions | — | 59.7Kas of Jun 2014 | 48.3K | — | 9.0K |
| Vollands Phillip TVice President and President · 7 transactions | — | 56.7Kas of Jun 2018 | 30.5K | — | — |
| Tucei F Walker JrDirector · 3 transactions | — | 47.0Kas of Jun 2008 | 20.0K | 10.0K | — |
| Hunt David PDirector · 1 transaction | — | 46.0Kas of Mar 2007 | — | 6.0K | — |
| Ballantine William ThomasPresident and COO, Director · 1 transaction | — | 36.9Kas of Feb 2006 | 25.0K | — | — |
| Cutillo Joseph ADirector · 3 transactions | — | 36.2K | 23.7K | 12.5K | — |
| Cooper Samuel LeeVP & President, Env Services · 2 transactions | — | 11.0Kas of Mar 2009 | 15.5K | — | — |