| Rauma Crane Service Oy | Transport & logistics | 2017 |
| Rauma EMClab Oy | Professional & scientific | 1997 |
| Rauma Electronics Oy | Wholesale & retail | 1999 |
| Rauma Forest Care Oy | Agriculture & fishing | 2003 |
| Rauma Inspection Services Oy | Other services | 2023 |
| Rauma Marine Constructions Oy | Manufacturing | 2014 |
| Rauma Safety Solutions Oy | Education | 2005 |
| Rauma Snooker Avoin yhtiö | Arts & recreation | 1989 |
| Rauma Wellness Center Oy | Arts & recreation | 2026 |
| RaumaSteel Oy | Manufacturing | 2017 |
| Raumair Oy | Transport & logistics | 2011 |
| Rauman 100fysio Oy | Health & social care | 1994 |
| Rauman Akku Oy | Wholesale & retail | 1975 |
| Rauman Askarteluohjaus Oy | Wholesale & retail | 2014 |
| Rauman Asunnot Oy | Real estate | 1987 |
| Rauman Autokoulu Oy | Education | 1997 |
| Rauman Betoni Oy | Manufacturing | 2007 |
| Rauman Betoni ja Elementti A. Lampola Oy | Manufacturing | 1968 |
| Rauman Biljardisali Ky | Arts & recreation | 1989 |
| Rauman Emmix Oy | Hospitality | 1993 |
| Rauman Energia Oy | Energy | 1997 |
| Rauman Energia Sähköverkko Oy | Energy | 2016 |
| Rauman Fysikaalinen Hoitola Oy | Health & social care | 1982 |
| Rauman FysioAsema Oy | Health & social care | 1994 |
| Rauman Fysioterapia ja Hieronta Oy | Health & social care | 2026 |
| Rauman Ganal Invest Oy | Financial services | 1988 |
| Rauman Golf Simulaattori Oy | Arts & recreation | 2020 |
| Rauman Grafiprint Ky | Manufacturing | 1992 |
| Rauman Grillipalvelut Oy | Hospitality | 2010 |
| Rauman Hammaskeskus Oy | Health & social care | 2016 |
| Rauman Hotplastic Oy | Manufacturing | 1983 |
| Rauman Hovi Oy | Hospitality | 1993 |
| Rauman Hyvinvoinnin Walimo Oy | Arts & recreation | 2015 |
| Rauman IV- ja Peltityö Oy | Construction | 1992 |
| Rauman Jalosepät Ky | Wholesale & retail | 1989 |
| Rauman Jota Ky | Manufacturing | 1992 |
| Rauman Juku Oy | Construction | 1996 |
| Rauman Kahvilayritys Oy | Hospitality | 2015 |
| Rauman Karhu-Kate Oy | Real estate | 2000 |
| Rauman Keittiökaari Ky | Wholesale & retail | 1988 |
| Rauman Keittiöpiste Kommandiittiyhtiö | Wholesale & retail | 1987 |
| Rauman Kiiltovaunu Ky | Other services | 1985 |
| Rauman Kiulu- ja Tynnyritehdas avoin yhtiö | Manufacturing | 1997 |
| Rauman Kohdeasennus Oy | Manufacturing | 2006 |
| Rauman Kone ja Terä Oy | Manufacturing | 1986 |
| Rauman Konttoripalvelu Oy | Wholesale & retail | 1997 |
| Rauman Koti-Vakka Ky | Wholesale & retail | 1961 |
| Rauman Krouvi kommandiittiyhtiö | Hospitality | 1978 |
| Rauman Kukka-Shop Rosa Oy | Wholesale & retail | 1997 |
| Rauman Kuntoclub Ky | Arts & recreation | 1996 |
| Rauman Kuorma-autoasema Oy | Real estate | 1975 |
| Rauman Kylmärakenne Oy | Construction | 1987 |
| Rauman Laatuhuolto OY | Other services | 2013 |
| Rauman Laaturakenne Oy | Construction | 2002 |
| Rauman Laitehuolto Oy | Manufacturing | 2016 |
| Rauman Liikennekoulutus Oy | Education | 2014 |
| Rauman Liiketalo Oy | Real estate | 1975 |
| Rauman Lukko Oy | Arts & recreation | 2000 |
| Rauman Lämpö-Kartano Oy | Construction | 1979 |
| Rauman Länsituuli Oy | Other services | 2013 |
| Rauman M & K Kiinteistö Oy | Real estate | 2015 |
| Rauman Maalaus ja Rakennushuolto Oy | Construction | 1972 |
| Rauman Maarakennus Oy | Construction | 2008 |
| Rauman Materiaali- ja Konevuokraus Oy | Administrative & support | 1982 |
| Rauman Meriteollisuuskiinteistöt Oy | Real estate | 2006 |
| Rauman Mestari Oy | Hospitality | 2026 |
| Rauman Monitorihotelli Oy | Real estate | 2017 |
| Rauman Motiskellari Oy | Wholesale & retail | 1993 |
| Rauman Murske Oy | Mining & quarrying | 2006 |
| Rauman Nauha- ja Nappiliike Ky | Wholesale & retail | 1967 |
| Rauman Nostokonepalvelu Oy | Real estate | 1989 |
| Rauman Odd Fellow-talo Oy | Real estate | 1996 |
| Rauman Ompelukone Avoin yhtiö | Wholesale & retail | 2001 |
| Rauman Oppilaitoskiinteistöt Oy | Real estate | 2017 |
| Rauman Optiikka Oy | Wholesale & retail | 2022 |
| Rauman PKS-Kiinteistöt Osakeyhtiö | Real estate | 2009 |
| Rauman Painopiste Oy | Manufacturing | 1995 |
| Rauman Paperinpaalaamo Ky | Wholesale & retail | 1980 |
| Rauman Pellava ja Pitsi Ky | Wholesale & retail | 2005 |
| Rauman Peruukkinurkka Oy | Wholesale & retail | 1990 |
| Rauman Pesuhaka Oy | Other services | 1993 |
| Rauman Pienapupalvelu Oy | Administrative & support | 2018 |
| Rauman Piharakenteet Oy | Administrative & support | 2025 |
| Rauman Pullapaja Oy | Manufacturing | 1993 |
| Rauman Rakennushuolto Oy | Administrative & support | 2012 |
| Rauman Rakennuspeltityö Elo Oy | Construction | 1990 |
| Rauman Ratko osk | Construction | 1996 |
| Rauman Ratsastuskeskus Oy | Arts & recreation | 1989 |
| Rauman Rauta- ja Putkirakenne Oy | Construction | 2013 |
| Rauman Rohto ja Terveys Oy | Wholesale & retail | 2019 |
| Rauman Rouvat Oy | Real estate | 2007 |
| Rauman Sammutin Oy | Wholesale & retail | 2013 |
| Rauman Satama Oy | Transport & logistics | 2014 |
| Rauman Savulohi Oy | Wholesale & retail | 2021 |
| Rauman Saxi-Maxi Oy | Administrative & support | 1997 |
| Rauman Seudun Vesi Oy | Water & waste | 1997 |
| Rauman Sinimailanen Oy | Hospitality | 1994 |
| Rauman Suorajakelu Oy | Transport & logistics | 1990 |
| Rauman Sähkö- ja teleasennus Oy | Construction | 2001 |
| Rauman Talokeskus Oy | Real estate | 1975 |