| Rakennuspalvelu Muuronen Ky | Construction | 2006 |
| Rakennuspalvelu Nils Jaakkola Oy | Construction | 1995 |
| Rakennuspalvelu TK- Wood Oy | Construction | 2021 |
| Rakennussuunnittelu Airi Penttilä Oy | Professional & scientific | 1985 |
| Ratox Ky | Construction | 2011 |
| Ravenest Oy | Manufacturing | 2025 |
| Re-Po Rahoitus Oy | Financial services | 2015 |
| Red Carpet Brand Alliances Oy | Professional & scientific | 2020 |
| Ruoka-Roope Oy | Wholesale & retail | 1997 |
| S. Jäpälä Oy | Information & communication | 2022 |
| SF-Car Ky | Wholesale & retail | 2013 |
| SP Steam Piping Oy | Manufacturing | 2005 |
| SSN-Services Oy | Professional & scientific | 2018 |
| Sudenkuoppa OY | Other services | 2020 |
| Salamasa Oy | Real estate | 2026 |
| Sanna Antila Oy | Financial services | 2013 |
| Saveon Holding Oy | Financial services | 2025 |
| Saveon Oy | Agriculture & fishing | 2007 |
| Selänpään Vesihuolto-osuuskunta | Water & waste | 2003 |
| Sepän Liikenne Oy | Transport & logistics | 2008 |
| Siekkelin Puutyö Oy | Manufacturing | 1984 |
| Siekkelin Saha Oy | Manufacturing | 1984 |
| Skillcom Oy | Manufacturing | 2006 |
| Sooncape Oy | Real estate | 2023 |
| Sotamonttu Oy | Arts & recreation | 2024 |
| Stark Group Oy | Real estate | 2023 |
| SunuRak Ky | Health & social care | 2002 |
| Suomen Pakuri Oy | Agriculture & fishing | 2015 |
| Suomen Viherpeukalot Oy | Wholesale & retail | 1988 |
| Sydänkangas Oy | Other services | 2005 |
| Sähkö-Kiviranta Oy | Construction | 1982 |
| TAM Capital Oy | Financial services | 2026 |
| TEKE Oy | Manufacturing | 1995 |
| Taitokaivu Oy | Construction | 2018 |
| Taksi JHM Rämö kommandiittiyhtiö | Transport & logistics | 2014 |
| Taksikuljetus Ravantti Oy | Transport & logistics | 2008 |
| Taksipalvelu J.Mankki OY | Transport & logistics | 2020 |
| Tasoitetyö Tuviala Oy | Construction | 2006 |
| Terästallit Oy | Water & waste | 2022 |
| TiliValkea Oy | Professional & scientific | 2025 |
| Tilikievari Ky | Professional & scientific | 1993 |
| Tilitoimisto Ville Vaulaste Ky | Professional & scientific | 1992 |
| Tive kone Ky | Agriculture & fishing | 2018 |
| Tomato Coaching Oy | Education | 2026 |
| Top-1 Holding Oy | Financial services | 2025 |
| Touch of Butterfly Wing Properties Oy | Real estate | 2026 |
| Tribe-1ST Oy | Arts & recreation | 2000 |
| Tuulona Oy | Agriculture & fishing | 2021 |
| Tuuri Tallit Oy | Wholesale & retail | 2016 |
| Työmaa Oy Valkeala | Other services | 1989 |
| Viavit OY | Construction | 2018 |
| VLK Kiinteistöt Oy | Real estate | 2025 |
| VS-Hallit Oy | Real estate | 1992 |
| Vakuutuspalvelut Antila Ky | Financial services | 2005 |
| Valkeakoti Oy | Real estate | 2025 |
| Valkealan Gpower Ky | Wholesale & retail | 2009 |
| Valkealan Hierontapalvelu Ky | Health & social care | 2001 |
| Valkealan Joona Oy | Administrative & support | 2001 |
| Valkealan Kivi Oy | Manufacturing | 2018 |
| Valkealan Kouru Oy | Wholesale & retail | 2010 |
| Valkealan MRJ Oy | Construction | 2020 |
| Valkealan Paino-Karelia Oy | Manufacturing | 1996 |
| Valkealan Projektiapu Oy | Construction | 1979 |
| Valkealan Rakennus Oy | Construction | 2021 |
| Valkealan Saha Oy | Manufacturing | 1978 |
| Valkealan Sähkö ja Kone Oy | Wholesale & retail | 1990 |
| Valkealan Terminaali Oy | Transport & logistics | 1997 |
| Valkealan teollisuus ja kiinteistö Oy | Real estate | 1990 |
| Valmer Oy | Wholesale & retail | 1995 |
| Vatos Locos Events Oy | Arts & recreation | 2024 |
| VekruSoft Oy | Information & communication | 2024 |
| Vepek Vuorinen Oy | Construction | 1999 |
| Vigren T&E avoin yhtiö | Professional & scientific | 1991 |
| Vuorelan Sora Seppälä Ky | Construction | 1994 |
| WN Investment Oy | Real estate | 2006 |
| WPS Welding and Piping Service Oy | Manufacturing | 2011 |
| Xerkus Oy | Professional & scientific | 2017 |
| Xit Saneeraus Oy | Real estate | 2023 |
| Yeti-Talot Oy | Construction | 2020 |
| Yrityspalvelu Tuominen avoin yhtiö | Professional & scientific | 2018 |
| mWell oy | Professional & scientific | 2016 |
| ptk auto Oy | Other services | 2022 |