| 1t.org US Chapter |
| American Forest Foundation |
| American Forests |
| American Wood Council |
| Binational Softwood Lumber Council (BSLC) |
| Blue Forest |
| Environmental Defense Fund |
| Forest Stewards Guild |
| Green Diamond Resource Company |
| L&C Carbon |
| Manulife Investment Management |
| Molpus Woodland Group |
| National Alliance of Forest Owners |
| National Association of Forest Service Retirees |
| National Association of State Foresters |
| National Forest Foundation |
| National Woodland Owners Association |
| Open Space Institute |
| Port Blakely |
| PotlatchDeltic |
| Resource Management Service, LLC |
| Salt River Project |
| Society of American Foresters |
| Sustainable Forestry and African American Land Retention Network |
| Sustainable Forestry Initiative |
| The Climate Trust |
| The Conservation Fund |
| The Lyme Timber Company |
| The Trust for Public Land |
| The Westervelt Company |
| Theodore Roosevelt Conservation Partnership |
| Weyerhaeuser |