| McIntyre Julian AlexanderDirector · 18 transactions | — | 6.55M† | 269.3K | 1.20M | — |
| Coliseum Capital Partners L P +5 co-filersDirector · 2 transactions | — | 4.19M†as of Jul 2015 | 6.0K | — | — |
| Coliseum Capital Partners L P +4 co-filersDirector · 1 transaction | — | 3.81M†as of Oct 2014 | — | 375.0K | — |
| Blank JeremyDirector · 17 transactions | — | 2.91M†as of Jul 2025 | 1.17M | 681.9K | 154.3K |
| Rasmus Robert E.Chief Executive Officer, Director · 12 transactions | — | 2.08M† | 958.6K | 120.7K | — |
| Alta Fundamental Advisers LLC +1 co-filerDirector · 33 transactions | — | 2.03Mas of Jul 2024 | 102.5K | 1.25M | 95.0K |
| Alta Fundamental Advisers LLCDirector · 1 transaction | — | 1.02Mas of Jun 2017 | — | — | — |
| Durham Michael DPresident and CEO, Director · 15 transactions | — | 792.2K†as of Mar 2015 | 146.6K | — | — |
| Campbell-Breeden RichardDirector · 17 transactions | — | 491.7K† | 131.5K | 306.4K | — |
| Wong Joseph MChief Technology Officer · 25 transactions | — | 390.6K | 275.6K | 196.0K | 9.6K |
| Sampson L HeathPresident & CEO, Director · 26 transactions | — | 325.9Kas of Mar 2020 | 624.7K | — | — |
| McKinnies Mark HSVP & CFO, Director · 19 transactions | — | 222.3K†as of Aug 2014 | 69.7K | — | 9.7K |
| Marken GregCEO · 17 transactions | — | 195.8Kas of Mar 2023 | 202.2K | — | — |
| Williamson JeremyChief Operating Officer · 12 transactions | — | 185.6K | 220.6K | 400 | 7.0K |
| Eicher Carol SDirector · 9 transactions | — | 174.0K | 96.5K | 77.5K | — |
| Bustard C JeanFormer COO · 15 transactions | — | 159.8Kas of Dec 2014 | 43.4K | — | — |
| Wells Louis SpencerDirector · 12 transactions | — | 102.9Kas of Jul 2024 | 102.9K | — | — |
| Smith Claiborne BensonGen Counsel, Corp Secretary · 9 transactions | — | 94.5K | 72.0K | 2.0K | 7.8K |
| Smith Jeffrey ClarkDirector · 3 transactions | — | 90.8Kas of Jul 2014 | 3.3K | — | — |
| Marcum W PhillipDirector · 4 transactions | — | 83.1Kas of Jul 2015 | 7.2K | — | — |
| Sjostrom SharonChief Product Officer · 27 transactions | — | 66.5Kas of Mar 2018 | 57.0K | — | — |
| Simonton Taylor J.Director · 7 transactions | — | 65.8Kas of Jul 2022 | 53.6K | — | — |
| Fields MorganChief Accounting Officer · 6 transactions | — | 64.6Kas of Aug 2023 | 55.6K | — | — |
| Hansen StaciaChief Accounting Officer · 6 transactions | — | 64.3K | 41.0K | — | 6.3K |
| Amrhein Christine B.Former General Counsel · 24 transactions | — | 56.7K†as of Aug 2016 | 18.1K | — | — |
| Bergman LaurieDirector · 3 transactions | — | 51.7Kas of Jul 2025 | 51.7K | — | — |
| Voncannon Jay LoringChief Financial Officer · 4 transactions | — | 48.3K | 50.0K | 15.0K | 16.7K |
| Johnson DerekDirector · 6 transactions | — | 47.0Kas of Jul 2017 | 24.1K | — | — |
| Pate R CarterDirector · 6 transactions | — | 34.7Kas of Jul 2020 | 34.7K | — | — |
| Gabbard Alan BradleyDirector · 11 transactions | — | 34.5Kas of Dec 2017 | 45.5K | — | 15.0K |
| Miller RichardVP · 3 transactions | — | 34.3Kas of Nov 2013 | 13.0K | — | — |
| Hanson RonSVP of Operations of ADA-ES · 8 transactions | — | 33.9Kas of May 2018 | 21.6K | — | 1.2K |
| Schlager Richard JVP · 2 transactions | — | 29.4Kas of Nov 2013 | 234 | — | — |
| Lagarenne Jonathan RFormer Executive VP · 19 transactions | — | 28.7Kas of Mar 2016 | 13.9K | — | 2.0K |
| Sanders Theodore JamesGeneral Counsel · 12 transactions | — | 28.2Kas of Nov 2021 | 58.9K | — | — |
| Leen BrianDirector · 3 transactions | — | 19.7Kas of Jul 2020 | 19.7K | — | — |
| Swanson Richard JohnDirector · 2 transactions | — | 17.8Kas of Jan 2014 | 1.2K | — | — |
| Martin Cameron E.VP · 2 transactions | — | 15.8Kas of Nov 2013 | 250 | — | — |
| Mattison Graham OVP Investor Relations · 12 transactions | — | 15.6Kas of Mar 2016 | 8.7K | — | — |
| Simonton TaylorDirector · 3 transactions | — | 12.3Kas of Jul 2016 | 12.3K | — | — |
| Clarke Kim BDirector · 4 transactions | — | 9.2Kas of Jul 2015 | 7.6K | — | — |
| Smith Rachel AnnChief Accounting Officer · 2 transactions | — | 3.0Kas of Jan 2015 | 2.6K | — | — |