| McKim Alan SEXEC CHAIR, CTO., Director · 160 transactions | — | 2.32M† | 176.0K | 25.0K | 2.66M |
| Waxlax Lorne RDirector · 11 transactions | — | 189.7Kas of Sep 2011 | 16.3K | — | — |
| Lefebvre Marvin GEVP (CHI sub) · 78 transactions | — | 140.3K†as of Dec 2017 | 45.9K | — | 95.9K |
| Rutledge James MVice Chmn, Pres., Director · 62 transactions | — | 118.2Kas of Sep 2016 | 159.2K | — | 20.0K |
| Battles Michael LouisCO-CEO, Director · 131 transactions | — | 97.5K | 259.1K | 6.7K | 77.3K |
| Weber Brian PEVP (CHESI) · 157 transactions | — | 48.7K | 178.3K | — | 66.1K |
| Curtis George LEXEC. VICE PRESIDENT (CHESI) · 118 transactions | — | 46.0K | 84.0K | — | 42.2K |
| Marlin RodDirector · 36 transactions | — | 39.8K†as of May 2021 | 20.0K | — | 209.2K |
| Evens DeirdreExec VP (CHESI subsidiary) · 41 transactions | — | 39.3Kas of Jun 2015 | 44.8K | — | 1.8K |
| Gerstenberg Eric WCO-CEO · 166 transactions | — | 38.9K | 425.0K | — | 211.5K |
| Kraus Eric AExec. Vice President (CHESI) · 28 transactions | — | 33.1Kas of Sep 2018 | 43.7K | — | 1.1K |
| Twohig Michael JEVP (CHESI) · 122 transactions | — | 28.9Kas of Mar 2023 | 106.5K | — | 56.6K |
| Shields Thomas JDirector · 27 transactions | — | 28.8Kas of May 2022 | 47.3K | — | 28.2K |
| Correll Jerry ElmerPres. (Safety-Kleen Systems) · 50 transactions | — | 28.5Kas of Dec 2015 | 75.9K | — | 39.6K |
| McCarthy Daniel JamesDirector · 29 transactions | — | 27.4K†as of Jun 2016 | 33.4K | — | 11.6K |
| Galante Edward GDirector · 22 transactions | — | 25.5K | 27.5K | — | — |
| Cowan GraceEVP Customer Service (CHESI) · 5 transactions | — | 22.9Kas of Sep 2018 | 4.5K | — | 424 |
| Gabriel Sharon M.EVP/CIO (CHESI) · 63 transactions | — | 22.5K | 40.2K | — | 11.6K |
| Duffee KirkEVP (CHESI) · 12 transactions | — | 21.7Kas of Sep 2016 | 11.2K | — | — |
| Beals John RSR. VP, Controller · 28 transactions | — | 19.0Kas of Feb 2014 | 12.1K | — | 430.93 |
| Underwood RebeccaPRESIDENT & EVP FACILITIES · 17 transactions | — | 18.7K | 10.4K | — | — |
| Devillars John PDirector · 20 transactions | — | 18.6Kas of Jun 2015 | 23.4K | — | 15.5K |
| Speights RobertPRESIDENT, INDUSTRIAL SERVICES · 53 transactions | — | 16.3Kas of May 2025 | 67.9K | 2.5K | 15.0K |
| Diderich JeroenEVP&President of Sales&Service · 8 transactions | — | 16.2K | 19.5K | — | — |
| Dugas Eric J.EVP CHIEF FINANCIAL OFFICER · 117 transactions | — | 15.3K | 69.5K | 1.1K | 30.6K |
| Pucillo AnthonyExec. VP (CHESI) · 10 transactions | — | 15.2Kas of Mar 2007 | 27.7K | — | 23.2K |
| Schwinn LauraPres Oil/Gas Field Services · 3 transactions | — | 14.6Kas of May 2013 | 14.6K | — | — |
| Bouldin Mark G.EVP/SK · 28 transactions | — | 13.8Kas of Jun 2018 | 13.1K | — | 4.4K |
| Parry David MExecutive Vice President · 90 transactions | — | 11.5Kas of Sep 2018 | 136.5K | — | 55.4K |
| States LaurenDirector · 28 transactions | — | 11.4K | 17.8K | — | 5.9K |
| Welch John R.Director · 20 transactions | — | 10.9K | 21.2K | — | 8.5K |
| Geer Charles H. IIEVP, Industrial Services · 6 transactions | — | 10.8K | 2.3K | — | — |
| Lindgren Eric R.EVP/CIO (CHESI) · 8 transactions | — | 10.6Kas of Jan 2016 | 7.7K | — | 1.0K |
| Kaslow John FDirector · 18 transactions | — | 10.3Kas of Jun 2014 | 25.7K | — | 20.9K |
| McDuffie MelkeyaEVP, HUMAN RESOURCES OFFICER · 6 transactions | — | 10.1Kas of May 2023 | 11.0K | — | 945 |
| Willett RobertDirector · 9 transactions | — | 10.0K | 10.0K | — | — |
| Robertson AndreaDirector · 57 transactions | — | 9.8K | 41.0K | — | 35.3K |
| Cookson Eugene A JrEVP (CHESI)* · 11 transactions | — | 8.8Kas of Mar 2009 | 50.4K | — | 40.0K |
| Gerlin Simon RSVP Compliance - CHESI · 10 transactions | — | 8.7Kas of Mar 2012 | 6.6K | — | — |
| Moynihan StephenSr. VP Planning/Development · 47 transactions | — | 8.7Kas of May 2008 | 24.2K | — | 58.4K |
| Fusco StevenEVP CIO (CHESI) · 5 transactions | — | 7.8Kas of Nov 2013 | 5.3K | — | 440 |
| Gagnon Robert E.EVP CFO and Treasurer · 3 transactions | — | 7.4Kas of Sep 2012 | 7.4K | — | — |
| Preston John TDirector · 35 transactions | — | 7.0K | 40.2K | — | 39.1K |
| Harrison Robert W.EVP, EHS · 19 transactions | — | 7.0K | 7.7K | — | 122 |
| Johnston Robert A.Pres.-Oil&Gas of Subsidiaries · 16 transactions | — | 6.7Kas of Jan 2021 | 19.2K | — | — |
| Barr JohnDirector · 7 transactions | — | 5.9Kas of Sep 2008 | 12.6K | — | 11.7K |
| Reed Marcy L.Director · 8 transactions | — | 5.7K | 6.6K | — | 836 |
| Banucci Eugene GDirector · 24 transactions | — | 5.6Kas of Jun 2023 | 38.8K | — | 39.5K |
| Vergo David J.President, Safety-Kleen · 15 transactions | — | 4.8Kas of May 2019 | 34.4K | — | 3.5K |
| Stewart Shelley JRDirector · 5 transactions | — | 4.5K | 4.5K | — | — |
| Geary William JEx. Vice Pres. CHESI · 14 transactions | — | 4.3Kas of Mar 2009 | 8.1K | — | 2.2K |
| Polito KarynDirector · 6 transactions | — | 4.1K | 3.7K | 460 | — |
| Musselman DavidSR VP & Gen. Csl. CHESI · 9 transactions | — | 3.8Kas of May 2013 | 4.9K | — | — |
| Quirk Alison A.Director · 6 transactions | — | 3.6K | 4.5K | — | 893 |
| Knapp CurtEVP (Safety-Kleen) · 10 transactions | — | 3.2Kas of Jan 2015 | 16.6K | — | 12.3K |
| McDonald Michael RSr. VP/General Counsel(CHESI) · 5 transactions | — | 3.0Kas of Jun 2011 | 4.3K | — | 1.0K |
| Knapp Jeffrey HerbertEVP - HR (CHESI) · 31 transactions | — | 2.9Kas of Dec 2021 | 18.7K | 890 | 3.0K |
| Frick Janet BVP and Treasurer · 2 transactions | — | 2.7Kas of Mar 2010 | 1.2K | — | — |
| Eckelbarger DavidEVP (Safety-Kleen) · 8 transactions | — | 2.6Kas of Oct 2014 | 19.2K | — | 15.9K |
| Hobson PhilipEVP Asst Management (CHESI) · 1 transaction | — | 2.5Kas of Dec 2012 | 2.5K | — | — |
| Retallick Phillip GSenior Vice President CHESI · 38 transactions | — | 1.7Kas of Dec 2012 | 18.5K | — | 13.8K |
| Scandone Darren REVP (CHESI subsidiary) · 7 transactions | — | 100as of Dec 2008 | 6.4K | — | — |
| Oconnor William FSVP Risk Management CHESI · 35 transactions | — | 0as of Dec 2012 | 21.7K | — | 12.9K |
| Seeger ThomasFORMER CHESI EVP · 6 transactions | — | 0as of Sep 2012 | 4.0K | — | 600 |
| Melocik Christopher P.EVP · 3 transactions | — | 0as of Sep 2016 | 7.9K | — | — |
| Mohan Stephen M.Chief Sales Officer · 1 transaction | — | 0as of Oct 2016 | 10.0K | — | — |