| Skorovaskraft AS | Skorovatn | 1989 |
| Skrudsarkraft AS | Forsand | 1998 |
| SKS Handel AS | Fauske | 2003 |
| SKS Produksjon AS | Fauske | 1975 |
| Skålheim Kraftverk AS | Norheimsund | 2006 |
| Skåråna Kraft AS | Oslo | 2019 |
| Slemmestad Energi AS | Oslo | 2020 |
| Slettefjell Vind Da | Hamar | 2026 |
| Sleveåne Kraft AS | Oslo | 2014 |
| Smallwinds AS | Oslo | 2023 |
| Smart Energi AS | Fredrikstad | 2010 |
| SMH Produksjon AS | Stokmarknes | 2025 |
| Smievoll Kraft AS | Reksteren | 2019 |
| Smisto Kraft AS | Mosjøen | 2015 |
| Smådøla Kraft AS | Bergen | 2004 |
| Småkraft AS | Bergen | 2002 |
| Småkraft Green Bond 1 AS | Bergen | 2018 |
| Småkraft Uspp 1 AS | Bergen | 2022 |
| Småkraft Vekst 2025 AS | Bergen | 2023 |
| Småkraft Vekst 2026 AS | Bergen | 2023 |
| Småkraft Vekst 2027 AS | Bergen | 2025 |
| Småvoll Kraftverk AS | Sunndalsøra | 2008 |
| Smøla Vind 2 AS | Oslo | 2003 |
| Smørklepp Kraftverk AS | Vinje | 2007 |
| Snefjellåkraft AS | Narvik | 2010 |
| Snowflake Capital AS | Oslo | 2008 |
| Snowproduction AS | Rasta | 2016 |
| Sodvin Holding AS | Kyrksæterøra | 1951 |
| Sogn Energi Ans | Luster | 2003 |
| Sogn Miljøkraft AS | Årdalstangen | 2017 |
| Sogn Og Fjordane Energi AS | Sandane | 2002 |
| Sognekraft AS | Vik I Sogn | 2020 |
| Sognekraft Eigedom AS | Vik I Sogn | 2021 |
| Sognekraft Produksjon AS | Vik I Sogn | 1947 |
| Soldekke AS | Drammen | 2023 |
| Soleie AS | Lillestrøm | 2020 |
| Solgrid AS | Lillestrøm | 2019 |
| Solgrid Nordvi AS | Lillestrøm | 2023 |
| Solgrid Ørje AS | Lillestrøm | 2023 |
| Solheimsdalen Kraft AS | Onarheim | 2008 |
| Solkongane AS | Stokke | 2024 |
| Solkraft Sør AS | Kristiansand S | 2021 |
| Solkraft Sør Sol- Og Batteriparker 2 AS | Kristiansand S | 2026 |
| Solkraft Sør Sol- Og Batteriparker 3 AS | Kristiansand S | 2026 |
| Solkraft Sør Sol- Og Batteriparker AS | Kristiansand S | 2025 |
| Solra AS | Porsgrunn | 2023 |
| Solvind Prosjekt AS | Rennesøy | 2007 |
| Solvind Åsen AS | Bryne | 2011 |
| Solør Bioenergi AS | Kirkenær | 2005 |
| Solør Bioenergi Holding AS | Kirkenær | 2005 |
| Solør Bioenergi Jessheim AS | Kirkenær | 2017 |
| Solør Bioenergi Rogaland AS | Kirkenær | 2023 |
| Solør Bioenergi Tranby AS | Kirkenær | 2015 |
| Solør Bioenergi Utility Solutions AS | Raufoss | 2008 |
| Solør Biogass AS | Braskereidfoss | 2026 |
| Solør Miljø Kraft AS | Flisa | 2009 |
| Sors Markets Norway AS | Oslo | 2024 |
| Source Galileo Holding AS | Haugesund | 2022 |
| Sov 2-8 Energi AS | Oslo | 2011 |
| Sov Eiendom AS | Oslo | 2021 |
| SPG AS | Lysaker | 2018 |
| Spidsbergseter Fjernvarme AS | Venabygd | 2022 |
| Spikkestad Nærvarme AS | Spikkestad | 2015 |
| Spinnerifossen Kraftkompani AS | Vikersund | 2023 |
| SSW Energy Trading GmbH Nuf | De-22113 Oststeinbeck | 2025 |
| ST1 Biokraft AS | Skogn | 2009 |
| Stadly Biodry AS | Tromsø | 2025 |
| Stannum AS | Rjukan | 2020 |
| Stardalen Kraft AS | Kristiansand S | 2010 |
| Statkraft AS | Oslo | 2004 |
| Statkraft Asset Holding AS | Oslo | 2012 |
| Statkraft Development Spain S.L. | Es-28020 Madrid | 2026 |
| Statkraft Energi AS | Oslo | 2004 |
| Statkraft Finnmark Vind AS | Oslo | 2026 |
| Statkraft Ih Holding AS | Oslo | 2003 |
| Statkraft Ih Invest AS | Oslo | 2002 |
| Statkraft Industrial Holding AS | Oslo | 1996 |
| Statkraft Markets GmbH | De-40476 Duesseldorf | 2024 |
| Statkraft Offshore Wind AS | Oslo | 2022 |
| Statkraft Sverige AB | Se-881 52 Sollefteå | 2014 |
| Statkraft Us Holding AS | Oslo | 2015 |
| Statkraft Ventures AS | Oslo | 2020 |
| Statkraft Vind Holding AS | Oslo | 2015 |
| Statkraft Vind Utvikling Da | Oslo | 2008 |
| Stavlandsneset Grønn Energi AS | Bremnes | 2000 |
| Stavåna Kraft AS | Stordal | 2012 |
| Stedjeåna Kraftverk AS | Åmli | 2004 |
| Steindal Kraftverk AS | Oslo | 2016 |
| Steindøla Kraft AS | Blaksæter | 2007 |
| Steine Kraft AS | Stord | 2005 |
| Steinsheia Sol- Og Batteripark AS | Kristiansand S | 2025 |
| Steinsvik Kraft AS | Vik I Sogn | 2015 |
| Stella Energy Norway AS | Oslo | 2024 |
| Stelåga Kraftverk AS | Oslo | 2023 |
| Stensrud Fossekompani AS | Vikersund | 2023 |
| Stinergy AS | Oslo | 2026 |
| Stjørdal Fjernvarme AS | Trondheim | 2007 |
| Stokkfjellet AS | Trondheim | 2018 |
| Storbekken Småkraftverk AS | Os I Østerdalen | 2023 |
| Storbrofoss Kraftanlegg Da | Lillehammer | 1999 |