| Ernst & Young U.S. LLP | Secaucus, NJ | 87 |
| Trinity Consultants, Inc. | Dallas, TX | 60 |
| California Air Resources Board | Sacramento, CA | 36 |
| University of Colorado | Boulder, CO | 31 |
| Battelle Memorial Institute | Richland, WA | 24 |
| WSP USA Inc. | New York, NY | 21 |
| The International Council on Clean Transportation | Washington, DC | 19 |
| World Resources Institute | Washington, DC | 19 |
| Environmental Defense Fund Inc. | New York, NY | 18 |
| The Trustees of Princeton University | Princeton, NJ | 18 |
| University of Maryland College Park | College Park, MD | 17 |
| Global Energy Monitor | Covina, CA | 17 |
| University of California at Santa Barbara | Santa Barbara, CA | 16 |
| Columbia University | New York, NY | 16 |
| ICF Incorporated, LLC | Reston, VA | 16 |
| A & B Environmental Services, Inc. | Houston, TX | 15 |
| AECOM Technical Services Inc | Dallas, TX | 14 |
| University of Minnesota | Minneapolis, MN | 14 |
| Ramboll Americas Engineering Solutions, Inc. | Syracuse, NY | 14 |
| University of California, Davis | Davis, CA | 13 |
| Ut-Battelle, LLC (Oak Ridge National Laboratory) | Oak Ridge, TN | 13 |
| Emory University | Atlanta, GA | 11 |
| The Nature Conservancy | Arlington, VA | 11 |
| State of Washington Department of Ecology | Lacey, WA | 11 |
| Cummins Inc. | Nashville, TN | 10 |
| ClimateWorks Foundation, Inc. | San Francisco, CA | 10 |
| University of Michigan | Ann Arbor, MI | 10 |
| Yale University | New Haven, CT | 8 |
| The Leland Stanford, Jr University | Stanford, CA | 8 |
| Energy and Environmental Economics, Inc. | San Francisco, CA | 8 |
| University of California, Berkeley | Berkeley, CA | 8 |
| Langan Engineering and Environmental Services, LLC | Parsippany, NJ | 8 |
| Geosyntec Consultants, Inc. | Boca Raton, FL | 7 |
| Colorado State University | Fort Collins, CO | 7 |
| Duke University | Durham, NC | 7 |
| Research Foundation for the State University of New York | Stony Brook, NY | 7 |
| Sequoia Climate Foundation | Irvine, CA | 7 |
| Center for Resource Solutions | San Francisco, CA | 7 |
| Harvard University | Cambridge, MA | 7 |
| University of California, Merced | Merced, CA | 7 |
| Centers for Disease Control and Prevention | Atlanta, GA | 7 |
| Stantec Consulting Services Inc. | Denver, CO | 6 |
| Alliance Technical Group, LLC | Decatur, AL | 6 |
| Ascent Environmental, Inc. | Sacramento, CA | 6 |
| University of Wyoming | Laramie, WY | 6 |
| University of California, Los Angeles | Los Angeles, CA | 6 |
| Kleinfelder, Inc. | San Diego, CA | 6 |
| University of Illinois | Urbana, IL | 6 |
| World Wildlife Fund US | Washington, DC | 6 |
| AGT Labs Inc. | Houston, TX | 6 |
| Lawrence Livermore National Security, LLC | Livermore, CA | 6 |
| New York University | New York, NY | 6 |
| Michigan State University | East Lansing, MI | 5 |
| Regents of the University of California at Riverside | Riverside, CA | 5 |
| CDP North America Inc. | New York, NY | 5 |
| University of Wisconsin System | Madison, WI | 5 |
| Alliance for Sustainable Energy, LLC | Golden, CO | 5 |
| Analytical Mechanics Associates, Inc. | Hampton, VA | 5 |
| Watershed Technology, Inc. | San Francisco, CA | 5 |
| Conservation International | Arlington, VA | 5 |
| Woodwell Climate Research Center, Inc. | Falmouth, MA | 5 |
| The Institute For Governance And Sustainable Development, Inc. | Washington, DC | 5 |
| Ocean Conservancy, Inc. | Washington, DC | 5 |
| GSI Environmental Inc. | Houston, TX | 5 |
| University of San Diego | San Diego, CA | 5 |
| The University of Virginia | Charlottesville, VA | 5 |
| The University of Alabama in Huntsville | Huntsville, AL | 5 |
| Purdue University | West Lafayette, IN | 5 |
| Fugro USA Marine, Inc. | Houston, TX | 5 |
| Oregon State University | Corvallis, OR | 5 |
| Good Earthkeeping Organization, Inc. | Orange, CA | 5 |
| Bay Area Air Quality Management District | San Francisco, CA | 5 |
| Stockholm Environment Institute U.S., Inc. | Somerville, MA | 4 |
| Pegasus Technical Services, Inc | Cincinnati, OH | 4 |
| The Curators of the University of Missouri | Columbia, MO | 4 |
| Texas A&M AgriLife Research | College Station, TX | 4 |
| University of California, Santa Cruz | Santa Cruz, CA | 4 |
| Indiana University | Indianapolis, IN | 4 |
| Slipstream Group, Inc. | Madison, WI | 4 |
| California Department of Transportation | Sacramento, CA | 4 |
| Clemson University | Clemson, SC | 4 |
| Florida International University | Miami, FL | 4 |
| University Of Florida | Gainesville, FL | 4 |
| Northern Arizona University | Flagstaff, AZ | 4 |
| Regional Greenhouse Gas Initiative, Inc. | New York, NY | 4 |
| Research Corporation of the University of Hawaii | Honolulu, HI | 4 |
| University of Massachusetts Chan Medical School | Shrewsbury, MA | 4 |
| C40 Cities Climate Leadership Group Inc. | New York, NY | 4 |
| Civil & Environmental Consultants, Inc. | Moon Township, PA | 4 |
| Rocky Mountain Institute, Inc. | Boulder, CO | 4 |
| Georgia Institute of Technology | Atlanta, GA | 4 |
| Becton, Dickinson and Company | Franklin Lakes, NJ | 4 |
| Union of Concerned Scientists, Inc. | Cambridge, MA | 4 |
| CALSTART, Inc. | Pasadena, CA | 4 |
| Scientific Certification Systems, Inc. | Emeryville, CA | 4 |
| Cornell University | Ithaca, NY | 4 |
| HDR Engineering, Inc. | Omaha, NE | 4 |
| Houston Advanced Research Center (HARC) | The Woodlands, TX | 4 |
| Texas Tech University | Lubbock, TX | 3 |
| Weaver and Tidwell, L.L.P. | Fort Worth, TX | 3 |
| Amazon.com Services LLC | Seattle, WA | 3 |
| Rutgers, The State University of New Jersey | Newark, NJ | 3 |
| Texas A&M University | College Station, TX | 3 |
| The University of Arizona | Tucson, AZ | 3 |
| Michigan Technological University | Houghton, MI | 3 |
| Louisiana State University and A&M College | Baton Rouge, LA | 3 |
| Vanasse Hangen Brustlin, Inc | Watertown, MA | 3 |
| Rhodium Group, LLC | New York, NY | 3 |
| Tufts University | Medford, MA | 3 |
| Hilmar Cheese Company Inc. | Hilmar, CA | 3 |
| Bezos Earth Fund LLC | Washington, DC | 3 |
| State of Oregon | Salem, OR | 3 |
| Trk Consulting LLC | Paterson, NJ | 3 |
| Michael Baker International, Inc. | Pittsburgh, PA | 3 |
| California Bioenergy LLC | Dallas, TX | 3 |
| Parsons Transportation Group Inc. | Pasadena, CA | 3 |
| University of Washington | Seattle, WA | 3 |
| ExxonMobil Biomedical Sciences, Inc. | Spring, TX | 3 |
| Sagua Consulting LLC | Miami, FL | 3 |
| Swift Transportation Services, LLC | Phoenix, AZ | 3 |
| Research Foundation of CUNY | New York, NY | 3 |
| Environmental Resources Management, Inc. | Malvern, PA | 3 |
| Stevens Institute of Technology | Hoboken, NJ | 3 |
| University of Alaska | Fairbanks, AK | 3 |
| Hillmann Consulting, LLC | Union, NJ | 3 |
| Catena Group LLC | Greenbrae, CA | 3 |
| The University of Iowa | Iowa City, IA | 3 |
| Kam Consultants Corp. | Long Island City, NY | 3 |
| Natural Resources Defense Council, Inc. | New York, NY | 3 |
| Clean Harbors Environmental Services, Inc. | Norwell, MA | 3 |
| Southern California Coastal Water Research Project | Costa Mesa, CA | 3 |
| Sonoma Technology, Inc. | Petaluma, CA | 3 |
| Virginia Polytechnic Institute & State University | Blacksburg, VA | 3 |
| WattTime Corporation | Oakland, CA | 3 |
| Ramboll US Consulting, Inc. | Arlington, VA | 3 |
| Chemtex Environmental Laboratory, Inc. | Port Arthur, TX | 3 |
| Anchor Qea, LLC | Irvine, CA | 3 |
| University of Rhode Island | Kingston, RI | 3 |
| State University Of New York At Buffalo | Buffalo, NY | 3 |
| Apexus Tech LLC | New Brunswick, NJ | 3 |
| BESST, Inc. | San Rafael, CA | 3 |
| The University Of Tennessee | Knoxville, TN | 3 |
| ACT Commodities Inc. | New York, NY | 3 |
| East Carolina University | Greenville, NC | 3 |
| Office of Environmental Health Hazard Assessment | Oakland, CA | 3 |
| RSB Solution Ltd Co | Houston, TX | 3 |
| CITGO Petroleum Corporation | Houston, TX | 3 |
| Apex Clean Energy, Inc. | Charlottesville, VA | 3 |
| The University of Chicago | Chicago, IL | 3 |
| The George Washington University | Washington, DC | 3 |
| International Council on Clean Transportation | Washington, DC, DC | 3 |
| Union of Concerned Scientists | Cambridge, MA | 3 |
| Arizona State University | Tempe, AZ | 3 |
| Sunbender LLC | Quincy, MA | 2 |
| Tripalink, Corp. | Los Angeles, CA | 2 |
| Picarro, Inc. | Santa Clara, CA | 2 |
| The University of Vermont | Burlington, VT | 2 |
| Trustees Of Boston University | Boston, MA | 2 |
| North Carolina State University | Raleigh, NC | 2 |
| Re-Nuble, Inc. | New York, NY | 2 |
| Haley & Aldrich, Inc. | Burlington, MA | 2 |
| Esgc Guam, LLC | Hagatna, | 2 |
| Inter-American Dialogue | Washington, DC | 2 |
| The Field Museum of Natural History | Chicago, IL | 2 |
| Northeastern University | Boston, MA | 2 |
| SKM Industries Inc | Olyphant, PA | 2 |
| Tomar Construction LLC. | East Brunswick, NJ | 2 |
| University Of California, San Diego | La Jolla, CA | 2 |
| Eastern Research Group, Inc. | Concord, MA | 2 |
| AARC Environmental, Inc. | Houston, TX | 2 |
| University of Massachusetts Lowell | Lowell, MA | 2 |
| Deep South Center for Environmental Justice | New Orleans, LA | 2 |
| University of Nevada, Las Vegas | Reno, NV | 2 |
| RSK Environmental LLC | Brooklyn, NY | 2 |
| Clean Energy Works | Washington, DC | 2 |
| Tetra Tech, Inc. | Pasadena, CA | 2 |
| Ibn Sina Foundation | Houston, TX | 2 |
| AstraZeneca Pharmaceuticals LP | Wilmington, DE | 2 |
| Sustainserv, Inc | Boston, MA | 2 |
| Climate Policy Initiative, Inc. | San Francisco, CA | 2 |
| IRIS Environmental Laboratories | Union, NJ | 2 |
| Bizlink Tech Inc. | El Paso, TX | 2 |
| Habiterre Inc. | Champaign, IL | 2 |
| Archer Daniels Midland Company | Decatur, IL | 2 |
| I & S Group, Inc. | Mankato, MN | 2 |
| Halter USA LLC | Boulder, CO | 2 |
| Hydril Company | Houston, TX | 2 |
| Wood Group USA, Inc. | Houston, TX | 2 |
| Geo-Enviro Consulting & Remediation LLC | Piscataway, NJ | 2 |
| Freeport Minerals Corporation | Phoenix, AZ | 2 |
| Texas State University | San Marcos, TX | 2 |
| New York Power Authority | White Plains, NY | 2 |
| Munster Drywall & Carpentry INC. | New York, NY | 2 |
| Sjca, Inc. | Indianapolis, IN | 2 |
| Honeywell International Inc. | Charlotte, NC | 2 |
| PACS Construction Laboratories & Testing Services Inc. | Houston, TX | 2 |
| Rich Mark Developer Group Inc. | Fort Lee, NJ | 2 |
| HIS International Group LLC | New York, NY | 2 |
| Trustees Of The University Of Pennsylvania | Philadelphia, PA | 2 |
| Washington University | St. Louis, MO | 2 |
| University of California, Agriculture and Natural Resources | Oakland, CA | 2 |
| Ceres, Inc. | Boston, MA | 2 |
| Edge Engineering and Science, LLC | Houston, TX | 2 |
| Boz Life Science Research and Teaching Institute | San Diego, CA | 2 |
| Schweitzer Engineering Laboratories, Inc. | Pullman, WA | 2 |
| The University of Texas at Austin | Austin, TX | 2 |
| Kepos Capital LP | New York, NY | 2 |
| Wayne State University | Detroit, MI | 2 |
| Mystic River Watershed Association | Arlington, MA | 2 |
| SCS Consulting Services Inc. | Emeryville, CA | 2 |
| Johns Hopkins University | Baltimore, MD | 2 |
| Delos Living LLC | New York, NY | 2 |
| Nucor Corporation | Charlotte, NC | 2 |
| SCA Environmental, Inc. | San Francisco, CA | 2 |
| Agilent Technologies, Inc. | Santa Clara, CA | 2 |
| Dicen Consulting and Associates LLC | Plainfield, IN | 2 |
| Ryan Specialty, LLC | Chicago, IL | 2 |
| VHB Engineering, Surveying, Landscape Architecture and Geology, P.C. | New York, NY | 2 |
| Sika Corporation | Lyndhurst, NJ | 2 |
| Center for Earth, Energy & Democracy | Minneapolis, MN | 2 |
| Integrity Recycling Inc. | Biscoe, NC | 2 |
| Maximum Drive LLC | Livonia, MI | 2 |
| University of South Florida | Tampa, FL | 2 |
| Metropolitan Area Planning Council | Boston, MA | 2 |
| Hanwha Q Cells Georgia, Inc. | White, GA | 2 |
| Arcadis U.S., Inc. | Highlands Ranch, CO | 2 |
| Air Company Holdings, Inc. | Brooklyn, NY | 2 |
| Veolia North America LLC | Boston, MA | 2 |
| AEJ Projects LLC | Freeport, ME | 2 |
| BSC Group, Inc. | Boston, MA | 2 |
| Pima County Government | Tucson, AZ | 2 |
| J.S. Held LLC | New York, NY | 2 |
| Tricord Consulting LLC | Frisco, TX | 2 |
| Srk Consulting (U.S.), Inc. | Denver, CO | 2 |
| Steelcase Inc. | Grand Rapids, MI | 2 |
| Arkansas Department of Transportation | Little Rock, AR | 2 |
| First Street Technology US, LLC | New York, NY | 2 |
| Grand Valley State University | Allendale, MI | 2 |
| Center for Human Rights and Environment Incorporated | Palm Beach Gardens, FL | 2 |
| DNV Business Assurance USA, Inc. | Katy, TX | 2 |
| North Santa Clara Resource Conservation District | San Jose, CA | 2 |
| American Green Consulting Group, LLC | Parker, CO | 2 |
| Trina Solar Development Solutions LLC | Pleasanton, CA | 2 |
| Fii USA, Inc. | Mt. Pleasant, WI | 2 |
| The Connecticut Agricultural Experiment Station | New Haven, CT | 2 |
| The Nuclear Company | Lexington, KY | 2 |
| The Boston Consulting Group, Inc. | Boston, MA | 2 |
| The Partnership Project | Washington, DC | 2 |
| The University of Alabama at Birmingham | Birmingham, AL | 2 |
| Landau Associates, Inc. | Seattle, WA | 2 |
| Georgetown University | Washington, DC | 2 |
| ICF Resources, LLC | Reston, VA | 2 |
| EcoHealth Alliance, Inc. F/K/A Wildlife Trust Incorporated | New York, NY | 2 |
| Aligned Incentives LLC | Middleton, MA | 2 |
| Aerodyne Research, Inc. | Billerica, MA | 2 |
| Georgia Environmental Protection Division | Atlanta, GA | 2 |
| [C] Worthy, LLC | Boulder, CO | 2 |
| The Breakthrough Institute | Berkeley, CA | 2 |
| Intrinsyx Environmental | Sunnyvale, CA | 2 |
| Envocare Environmental and Facility Management, LLC | Somerset, NJ | 2 |
| The Vertex Companies, Inc. | Weymouth, MA | 2 |
| DNV GL USA, Inc. | Katy, TX | 2 |
| Spelman College | Atlanta, GA | 2 |
| Hawai'i Pacific University | Honolulu, HI | 2 |
| Smithsonian Institution | Washington, DC | 2 |
| University Of Cincinnati | Cincinnati, OH | 2 |
| The University of Southern California | Los Angeles, CA | 2 |
| Factory Mutual Insurance Company | Johnston, RI | 2 |
| Urban Policy Innovations LLC | Detroit, MI | 2 |
| Great Plains Institute for Sustainable Development, Inc. | Minneapolis, MN | 2 |
| Power For Change LLC | Green Bay, WI | 2 |
| Chemtech Consulting Group Inc. | Mountainside, NJ | 2 |
| Conocophillips Company | Houston, TX | 2 |
| Clean Air Task Force, Inc. | Boston, MA | 2 |
| DREAM Venture Labs Inc. | Cambridge, MA | 1 |
| A1 Analytics Inc | Corpus Christi, TX | 1 |
| Enviro-Sciences (of Delaware), Inc. | Lake Hopatcong, NJ | 1 |
| Delta-Phase Electronics Inc. | Irvine, CA | 1 |
| Semilla Nueva | Boise, ID | 1 |
| California Public Utilities Commission | Sacramento, CA | 1 |
| Seekc LLC | San Francisco, CA | 1 |
| Great Plains Institute for Sustainable Development | Minneapolis, MN | 1 |
| Discovery Energy, LLC | Kohler, WI | 1 |
| Borough of State College | State College, PA | 1 |
| Big Stone Renewables LLC | Clovis, CA | 1 |
| The University Of Kansas Medical Center | Kansas City, KS | 1 |
| Willdan Energy Solutions | Anaheim, CA | 1 |
| Precision Design & Consulting | Brooklyn, NY | 1 |
| Perkins & Will, Inc. | Chicago, IL | 1 |
| Greenio LLC | Clearwater, FL | 1 |
| Simple BI, Inc. | Houston, TX | 1 |
| AMT Foundation | Minden, NV | 1 |
| Suburban Propane Partners, L.P. | Whippany, NJ | 1 |
| Finsight Group, Inc. | New York, NY | 1 |
| Gridware, Inc. | San Francisco, CA | 1 |
| exp U.S. Services Inc. | Chicago, IL | 1 |
| LG Energy Solution Michigan, Inc. | Holland, MI | 1 |
| University of Connecticut | Storrs, CT | 1 |
| Price Power USA, Inc. | Vernon, CA | 1 |
| Green Places Inc. | Raleigh, NC | 1 |