| Porkkanahäntä Oy | Wholesale & retail | 2019 |
| Premium Cars & Boats Oy | Administrative & support | 2019 |
| Pressbody Oy | Manufacturing | 1983 |
| ProPiku Oy | Construction | 2023 |
| Profilt Service Oy | Construction | 2025 |
| Psykologipalvelu Fokka Oy | Professional & scientific | 2000 |
| Psykologitiimi Päämäärä Oy | Professional & scientific | 1995 |
| R-Kuutio Oy | Manufacturing | 1987 |
| Rackstar Oy | Information & communication | 2014 |
| Racy Ranch Oy | Other services | 2024 |
| RadiVag Oy | Health & social care | 2024 |
| Rahtipalvelu Immonen Oy | Transport & logistics | 2026 |
| Rahulix Oy | Real estate | 2023 |
| Raikeva Oy | Manufacturing | 1995 |
| Raision Ajo-Opet Ky | Education | 2005 |
| Raision Autopeltikorjaamo Ky | Other services | 1986 |
| Raision seudun Laatoitusurakointi Oy | Construction | 2007 |
| Rajukivi Oy | Construction | 2021 |
| Rakennuspalvelu Ari Saari Oy | Construction | 2000 |
| Rakennuspalvelu Arma Oy | Construction | 2020 |
| Rakennuspalvelu M. Aulio Oy | Construction | 2006 |
| Rakennustoimisto Lainio & Laivoranta Oy | Construction | 2002 |
| Rakennusyhtymä Kakskerta Oy | Construction | 2023 |
| Rakevi Oy | Construction | 2021 |
| Rauman Tehocons Oy | Real estate | 1990 |
| Rautela Investment Oy | Financial services | 2025 |
| Rautela Media Oy | Professional & scientific | 2024 |
| Red & Gold Archipelago Oy | Manufacturing | 2024 |
| Rengasmäki Oy | Wholesale & retail | 2002 |
| Riihipolku Oy | Health & social care | 2009 |
| Riviera Beach Grill Oy | Hospitality | 2022 |
| Rivieran Keidas Ky | Hospitality | 2009 |
| RoFixCar Oy | Other services | 2025 |
| Robust Industry Oy | Financial services | 2025 |
| Roja Oy | Construction | 2015 |
| Ropaplan Oy | Professional & scientific | 2024 |
| Ros10 Oy | Professional & scientific | 2024 |
| Rukaduuri Oy | Real estate | 2001 |
| Runtime Oy | Information & communication | 2020 |
| Ruokapolku Avoin Yhtiö | Wholesale & retail | 2020 |
| SK Profit Oy | Arts & recreation | 1998 |
| SL-Rakennuspalvelu Oy | Construction | 2012 |
| SR-Laatoitus Oy | Construction | 2024 |
| SUN Viherkasvipalvelu Ky | Other services | 1991 |
| Svarga Vent OY | Construction | 2022 |
| SaMaProTeam Oy | Wholesale & retail | 2018 |
| Sama Laari Oy | Real estate | 1994 |
| Samano Oy | Professional & scientific | 2021 |
| Sameltech Oy | Construction | 2012 |
| Sarinia Oy | Wholesale & retail | 2009 |
| SaunaMakers Oy | Construction | 2020 |
| Saunaparoni Oy | Administrative & support | 2002 |
| Seppä IT & Business Consulting Oy | Information & communication | 2024 |
| Sepät Oy | Manufacturing | 2014 |
| Sepät Yhtymä Oy | Financial services | 2024 |
| Seuraava Sivu Oy | Financial services | 2020 |
| Signode Finland Oy | Manufacturing | 1978 |
| Solalehto Oy | Construction | 1995 |
| Spartan product Oy | Administrative & support | 2009 |
| Sportcare Ky | Wholesale & retail | 1987 |
| Spotissa Oy | Professional & scientific | 2020 |
| Starcasall Oy | Hospitality | 2025 |
| Stefano Glorioso Oy | Hospitality | 2008 |
| Stidit Oy | Professional & scientific | 2022 |
| SuHe on Oy | Other services | 2022 |
| Suodatinmyynti Arttu Heinonen Oy | Wholesale & retail | 2025 |
| Suomalaiset maailmalla Oy | Information & communication | 2019 |
| Suomen Broiler Oy | Agriculture & fishing | 1968 |
| Suomen Kaivosaneeraus Oy | Water & waste | 2014 |
| Suomen Riistajousi Oy | Wholesale & retail | 2017 |
| Suomen Teollisuusrengas Oy | Wholesale & retail | 2011 |
| Suomen Vuokramajoitus Oy | Hospitality | 2019 |
| Suomen lattialämmitys asennus oy | Construction | 2021 |
| Suomen rantaravintola Oy | Hospitality | 2023 |
| Suomipilvi Oy | Information & communication | 2009 |
| Suvanto Group Oy | Real estate | 1990 |
| Sähkö Hietanen Oy | Construction | 2019 |
| Sähköasennus Ristimäki Oy | Construction | 1996 |
| Sähköasennus Suomela Oy | Construction | 2011 |
| Sähkötyö Rintamäki Oy | Construction | 1987 |
| T & H Markkola Oy | Manufacturing | 1993 |
| T&M Masku Oy | Professional & scientific | 2025 |
| TH Viestintäpalvelut Oy | Information & communication | 2023 |
| TM Luotonen Oy | Transport & logistics | 2016 |
| TMK - Taksi Oy | Transport & logistics | 2018 |
| Talocom | Construction | 2022 |
| Talorakennus Sainio Oy | Construction | 2011 |
| Taponketo Oy | Real estate | 1991 |
| Tartin Oy | Professional & scientific | 2012 |
| Tassam Oy | Manufacturing | 1990 |
| Tekrim Oy | Wholesale & retail | 1987 |
| Teollisuusmaalaamo K. Nikander Oy | Construction | 2009 |
| Terveyspalvelut Mustonen Oy | Health & social care | 2020 |
| Terveyspata Oy | Hospitality | 2025 |
| Teräsrakenne Aalto Oy | Manufacturing | 2025 |
| Tili-Finanssi Oy | Professional & scientific | 2007 |
| Tilimeklarit Oy | Professional & scientific | 2000 |
| Timanttityöt Hiippavuori Oy | Construction | 2019 |
| Tiretek Oy | Wholesale & retail | 1989 |
| Tom Karlsson Capital Oy | Financial services | 2000 |