The following is a partial list of the firms that meet the Index rules and methodology for inclusion during its most recent annual review in September. Current free-floating weightings can be found on  website.

2U Inc Aflac Agrium
Alphabet Amedisys American States Water
American Water Works Apple Aqua America
Acadia Health Autoliv Bright Horizons
Brookdale Senior Living Brookfield Renewable Bunge
California Water Service CF Holdings Clarcor
Clear Harbors Compass Minerals Covanta
Danaher Davita Disney
Donaldson Corp Ecolab Enersys
Envision Healthcare Facebook First Solar
Hain Celestial HCA Healthcare HCP
Healthsouth Hologic Itron
Johnson Controls Lifepoint Health LTC Properties
Molina Healthcare Mosaic MSA Safety
Nexterra Energy NRG Energy Omega Healthcare
Ormat Technologies Pearson Pentair
Potach Priceline Rayonier
Republic Services Rexnord Sabra Healthcare
Sao Paolo Water Select Medical Holdings Scholastic
Senior Housing Properties Socieded Minera de Chile Sprouts Farmers
Stericycle Teledoc Tenet Healthcare
Tesla TripAdvisor Twitter
United Natural Foods Unum Group Universal Health Svcs
Ventas Walgreens Boots Waste Connections
Waste Mgmt Watts Water Tech Western Union
Weyerhaeuser Xylem Zoetis