| OPTIONS INTERSTATE RESOURCE CENTER FOR INDEPENDENT LIVING | North Dakota | — | current |
| 8-Hour Ozone SIP Coalition | Texas | 2018-01-09 | 2026-12-31 |
| CLL Municipal Utility District No. 1A | Texas | 2021-04-16 | 2021-12-31 |
| City of Austin | Texas | 2018-01-09 | 2026-12-31 |
| City of Houston | Texas | 2019-01-03 | 2026-12-31 |
| Digital Childhood Alliance, Inc. | Texas | 2025-04-16 | 2025-12-31 |
| Exide Technologies | Texas | 2018-08-08 | 2020-12-31 |
| Formosa Plastics Corporation, Texas | Texas | 2022-10-05 | 2026-12-31 |
| IGT and Its Affiliates | Texas | 2018-01-09 | 2020-08-10 |
| J&M Premier Services, Inc. | Texas | 2018-01-09 | 2026-12-31 |
| KK-125 Ovarian Cancer Research Foundation | Texas | 2018-01-09 | 2018-12-31 |
| Landowners Coalition of Texas | Texas | 2018-01-09 | 2022-12-31 |
| Lee M. Bass Inc. | Texas | 2018-01-09 | 2019-12-31 |
| Republic Services | Texas | 2018-01-09 | 2023-10-02 |
| SJW Group | Texas | 2018-08-01 | 2022-12-31 |
| SJW Group dba Texas Water Company | Texas | 2023-01-25 | 2025-12-31 |
| Schwertner Farms, Inc. dba Capitol Land & Livestock Company | Texas | 2021-04-13 | 2021-12-31 |
| Texas Hemp Business Council | Texas | 2025-10-15 | 2026-12-31 |
| Texas Mineral Resources Corp. | Texas | 2019-01-03 | 2022-12-31 |
| Texas Rare Earth Resources | Texas | 2018-01-09 | 2018-12-31 |
| USA Rare Earth, LLC | Texas | 2019-12-09 | 2026-12-31 |
| Upper Neches River Municipal Water Authority | Texas | 2018-01-09 | 2026-12-31 |
| WBW Development Group, LLC - Series 016 | Texas | 2020-07-09 | 2021-07-07 |
| Westwind Ranch LP | Texas | 2025-01-16 | 2026-12-31 |