| P. Holm Ky | Transport & logistics | 1996 |
| PHMech Oy | Professional & scientific | 2021 |
| PS Pohjarakennus Oy | Construction | 2019 |
| PT-Kuormaus Ky | Construction | 2005 |
| Paala Kiinteistöt Oy | Real estate | 2021 |
| Perhekoti Pytinki Oy | Health & social care | 2008 |
| Pienkonehuolto Masiinapaja Oy | Manufacturing | 2011 |
| Piirinuohooja Paavo Lassila Ky | Administrative & support | 1994 |
| Poraus ja Louhinta Aaltonen Oy | Construction | 2008 |
| Porvoon Hevosklinikka Oy | Professional & scientific | 2010 |
| Porvoon Jalkaterapia Oy | Health & social care | 2024 |
| Porvoon Paalurakenne Oy | Construction | 2006 |
| Porvoon seudun parketti ja sisustus Ky | Construction | 2002 |
| Praskin Tila Oy | Wholesale & retail | 2020 |
| Premium Hunters Oy | Administrative & support | 2024 |
| Pro MJ Oy | Construction | 2023 |
| ProComia Oy | Health & social care | 2019 |
| Produage Oy | Administrative & support | 2026 |
| Profundo Oy | Professional & scientific | 2013 |
| Proto-Karjaa Oy | Manufacturing | 1995 |
| Puihin Oy | Hospitality | 2020 |
| Puusepänverstas Palisanteri Oy | Construction | 2002 |
| Puutarhapojat Ky Jukka Huovila | Administrative & support | 1990 |
| Puutyö Ra-Pe Kommandiittiyhtiö Rantanen Petri | Construction | 1999 |
| Quickmac Oy | Professional & scientific | 1995 |
| Rakennus Laprip Oy | Construction | 1999 |
| Rakennus T Heljanko Oy | Construction | 1988 |
| Rakennus TATOKA OY | Construction | 2021 |
| Rakennuspalvelu K. Koskela Kommandiittiyhtiö | Construction | 1999 |
| Rakennustarkastus Group Oy | Professional & scientific | 2025 |
| Rakennustarkastus ROK Oy | Professional & scientific | 2025 |
| Rataki Oy | Wholesale & retail | 2024 |
| ReWo-Invest Oy | Financial services | 2017 |
| Rednali Oy | Professional & scientific | 2025 |
| RempPasi Oy | Construction | 2021 |
| RetroStore Oy | Wholesale & retail | 2024 |
| Rex Nordic Finland Oy | Wholesale & retail | 2018 |
| Rex Nordic Oy | Wholesale & retail | 2014 |
| Ritva Hätönen, RH-Invest Oy | Financial services | 1989 |
| S & M Marketing Oy | Professional & scientific | 1998 |
| SJ-Urakointi Oy | Construction | 2025 |
| SPC Asunnot Oy | Real estate | 2019 |
| SR Energia Oy | Construction | 2018 |
| SRL Group Oy | Wholesale & retail | 2021 |
| SW Industrial Oy | Manufacturing | 2023 |
| Sekrator Oy | Construction | 2023 |
| Sewatek Oy | Wholesale & retail | 2018 |
| Sieno Oy | Manufacturing | 2024 |
| Siivouspalvelu ja vanhus- ja vammaisapu Sansibar Oy | Administrative & support | 2020 |
| SimFors Oy | Manufacturing | 2001 |
| SopivaPutki Oy | Construction | 2019 |
| Suomen Agrikeskus Oy | Real estate | 1996 |
| Suomen Parvekekaihdin Oy | Wholesale & retail | 2022 |
| Suomen Parvekekaihdin PM Oy | Wholesale & retail | 2024 |
| Suomen Parvekekaihdin VS Oy | Wholesale & retail | 2024 |
| Suomen Räjäytyslouhinta Oy | Construction | 2011 |
| Suomen Selluvilla-Eriste Oy | Construction | 1979 |
| Suomen Terassilasitus Oy | Construction | 2024 |
| Suvimäki Palvelut Oy | Administrative & support | 2021 |
| Syytinkiä Oy | Professional & scientific | 2020 |
| Sähkö-Monset Oy | Construction | 1988 |
| T.K/Vuokraus.Oy | Transport & logistics | 2020 |
| T.M. Renki Oy | Real estate | 1990 |
| TH Murske Oy | Mining & quarrying | 2021 |
| TJAS Urakointi Oy | Administrative & support | 2018 |
| TJN Global Actuarial Solutions Oy | Administrative & support | 2014 |
| TSL Capital Oy | Administrative & support | 2021 |
| Tactical Athlete Oy | Education | 2023 |
| Tahko Speed Oy | Other services | 2009 |
| Taksi Konttinen Oy | Transport & logistics | 2017 |
| Taxi Peussa Oy | Transport & logistics | 2019 |
| Teakkeri Oy | Wholesale & retail | 1995 |
| Teemu Hopia Oy | Construction | 2013 |
| Termokoti Kommandiittiyhtiö M Toivainen | Real estate | 1979 |
| Tiiliruukin Vesi ja Viemäri Oy | Water & waste | 2026 |
| Tili- ja Isännöintipalvelut Ruuska Oy | Real estate | 2020 |
| Toive-Apu Oy | Administrative & support | 2024 |
| Tolkkisten Kiinteistökehitys Oy | Real estate | 2016 |
| Toponen Group Oy | Construction | 2022 |
| Tukista Oy | Other services | 2021 |
| TunnePuu oy | Manufacturing | 2018 |
| UTP - Uudenmaan Työvoimapalvelu Oy | Administrative & support | 2007 |
| Uljas Distillery & Brewery Oy | Wholesale & retail | 2022 |
| Uljas Vesi Oy | Manufacturing | 2026 |
| Uudenmaan Teollisuusmaalaamo Oy | Construction | 2020 |
| VOG Oy | Information & communication | 2004 |
| VaKoFd Oy | Other services | 1993 |
| Valoisa Coaching & Services Oy | Education | 2019 |
| Vendedor Oy | Information & communication | 2013 |
| Veroministeri Oy - Veroneuvontapalvelut | Administrative & support | 2019 |
| ViaDoc Isännöinti Ky | Real estate | 2011 |
| Viheriköt Oy | Professional & scientific | 1989 |
| Viipula Ky | Manufacturing | 1981 |
| Vilmatic Oy | Manufacturing | 2018 |
| Vintal Oy | Professional & scientific | 2005 |
| Visilab Signal Technologies Oy | Manufacturing | 1986 |
| Väkä-Rakenne Ky | Construction | 1987 |
| Välikeikka Oy | Construction | 2025 |
| Walls&Floors Oy | Real estate | 2021 |
| Wiho avoin yhtiö | Manufacturing | 2016 |