Platinum Level:
Aramco
Bank of America
Calpine
Lyondellbasell
McKesson Foundation
McLeod Sears, LLC
Phillips 66
The Robert and Janice McNair Foundation
Steven and Alexandra Cohen Foundation

Gold Level:
AIG
A.R. “Tony” & Maria J. Sanchez Family Foundation
Astros Foundation
BHP Billiton
Cheniere Energy
Gallery Furniture
SABIC

Silver Level:
Action Gypsum Supply
BBVA
Gunvor Group
Intercontinental Exchange
Shell Oil Company Foundation
Sodexo Foundation
Texas Mutual Insurance
Webber
Wells Fargo

Bronze Level:
The Better Generation X PJ Tucker
Buckeye Partners
Centerpoint Energy
Chinmaya Mission Houston
Engie
Equinor
Greene, Tweed & Col, Inc.
Hancock Bank
International Management District
MUFG
Northern Trust
Sempra Energy Foundation
Spire Energy
Woodforest Charitable Foundation

Supporting Level: 
Buddhist Church Second Long Hoa Temple
CNOOC Petroleum USA
Independent Financial
KPMG U.S. Foundation
Marvy Finger Family Foundation
Mizuho Bank
Origin Bank
Southwest Management District
Synchrony Bank
TC Energy
The Williams Foundation
Vitol Inc.
Wingstop
Yurman Family Foundation

Green Apple Level: 
Accredo Packaging, Inc.
Aveda
Barrios Technology
Boardwalk Pipelines
Carpenter Technologies
CBRE
The Clorox Company
Comcast
Comfort Systems USA
Cummins
D&M Leasing
Dow Chemical
DPR Construction
Earth Stone and Colours
Flatrock Energy Advisors, LLC
Ford
Frost Bank
Global Atlantic Financial Group
The Greater Houston Chinese Alliance
Gulf South
Houston Women’s Soccer Association
Huntsman International, LLC
LDA Management Company, Inc.
LiquidPower Specialty Products Inc.
Monument Chemical, LLC
Nacero Inc.
OP A Herman Miller Certified Network Dealer
Partners in Building, L.P.
Pattern Energy
Prime Lending
Prosperity Bank
Rubber Supply Co.
SAIC
Southern Gas Company
Texun Swimming Pools & Spa, Inc.
United Concordia Dental
Valco Industries