| Strategic Agenda (UK) Limited |
| Strathmore University |
| Streets Reimagined Ltd |
| Strengthening Participatory Organization (SPO) |
| Stripe Inc |
| Stroud Brewery Limited |
| StudentMarketing s.r.o. |
| Studio 1212 |
| Studio Future Ltd |
| Studio Wayne McGregor Limited |
| Sumisho Osaka Gas Water UK Ltd |
| Sumitomo Corporation Group |
| Summit Water Limited |
| Sungi Development Foundation |
| Sunmedair Travel & Tourism Services Srl |
| SunPower Corporation UK Limited |
| Sunshine Solar Limited |
| Superdrug Stores Plc |
| Susan Thompson Buffett Foundation |
| Sustainable Development Policy Institute |
| Sutton and East Surrey Water Plc (SES Water) |
| Suzuki Motor Corp |
| Svenska Handelsbanken AB |
| Svenska Jeans AB |
| SVM Asset Management |