| Goaskin Oy | Espoo | 2026 |
| Goat Labs Oy | Helsinki | 2025 |
| Goddesswaxtape Oy | Helsinki | 2023 |
| Goilo Oy | Vantaa | 2019 |
| Gold Lab Oy | Espoo | 2026 |
| Gold Tech Oy | Kotka | 2020 |
| Golden Gourmet Oy | Lieto | 2020 |
| Golden Topox Oy | Tampere | 1997 |
| Goldland Oy | Sastamala | 2009 |
| Golfmari Oy | Lohja | 2026 |
| Golla Oy | Kokkola | 1994 |
| Gomek Oy | Helsinki | 1991 |
| Gomia Oy | Pori | 2025 |
| Good Finn Meat Oy | Akaa | 2020 |
| Good Food Earth Oy | Turku | 2024 |
| Good Guys Oy | Nokia | 2018 |
| Good Life Coffee Roasters Oy | Helsinki | 2014 |
| Gooder Oy | Osoite Tuntematon | 2018 |
| Gorba Custom Cues oy | Kuusankoski | 2023 |
| GorillaSound osk | Helsinki | 2025 |
| Gormet Oy | Helsinki | 2020 |
| Gosmos Factory Oy | Parainen | 1998 |
| Gothic Boomer Productions Oy | Helsinki | 2025 |
| Govac Oy | Kerava | 1992 |
| Gpm Finland Oy | Honkajoki | 2011 |
| Graafinen Art-Set Oy | Järvenpää | 1987 |
| Graafinen Huolto, Pertti Vanhanen Ky | Vantaa | 1990 |
| Graafinen Kunnossapito Grönkvist & Co | Tuusula | 1979 |
| Graafinen Monipalvelu Oy Glenn Bäck | Lahti | 1994 |
| Graafinen Palvelu Seppo Mäkinen Ky | Somero | 1994 |
| Graafinen suunnittelu Harri Heikkilä Oy | Osoite Tuntematon | 1987 |
| Graafinen suunnittelu Markus Itkonen Oy | Helsinki | 1987 |
| Grabado Oy | Vaskio | 2015 |
| Grafeion Oy | Lempäälä | 1994 |
| Grafeko EH Oy | Tuusula | 1991 |
| GrafiTeam Oy | Joutsa | 2018 |
| Grafiikanpaja Himmelblau Oy | Tampere | 1990 |
| Grafiikka-, taitto- ja tekstipalvelu Vinjetti Ky | Järvenpää | 1989 |
| Grafiikkapalvelu Datagraf Ky | Nokia | 1990 |
| Grafimax Oy | Turenki | 1987 |
| Grafio Oy | Tampere | 2000 |
| Grafipepe Ky | Jyväskylä | 2000 |
| Grafipro Oy | Kaarina | 1991 |
| Grafitatu Oy | Jyväskylä | 2006 |
| Grafitrio Oy | Helsinki | 1987 |
| Grafors Oy | Forssa | 2025 |
| Grainfield Oy | Nivala | 1992 |
| Granarium Technologies Oy | Tuusula | 2024 |
| GrandPartner Oy | Varpaisjärvi | 2010 |
| Granite Devices Oy | Tampere | 2015 |
| Granlunds-Fisk Kb | Kasnäs | 1989 |
| Granmation Oy | Pori | 1992 |
| Granna Ab | Tjudö | 1953 |
| Grano Oy | Vantaa | 2008 |
| Granströms Båtvarv Oy | Hangonkylä | 1985 |
| Grate Finland Oy | Järvenpää | 2011 |
| Gravelon Oy | Pirkkala | 2021 |
| Great Fame OY | Helsinki | 2020 |
| Greco Service Ab | Kruunupyy | 2003 |
| Gredon Invest Oy | Lempäälä | 2003 |
| Green Bat Oy | Tampere | 2025 |
| Green Can Oy Ylöjärvi | Ylöjärvi | 1998 |
| Green Capes Oy | Lahti | 2021 |
| Green Chem Oy | Lieksa | 2025 |
| Green Division Oy | Loimaa | 1999 |
| Green Dragon Marine Oy | Helsinki | 2023 |
| Green Finance Oy | Räyrinki | 1994 |
| Green Justified Transition Oy | Helsinki | 2025 |
| Green Light Oy | Kaarina | 1996 |
| Green North Energy Oy | Turku | 2021 |
| Green Recycle Oy | Ruukki | 2020 |
| Green Tyre Recycling Finland Oy | Kuopio | 2020 |
| Green2eat Innovations Oy | Valkeakoski | 2026 |
| GreenCI.fi Oy | Säkylä | 2021 |
| GreenTechMate Oy | Joutseno | 2023 |
| Greenbay Marine Ltd Ab | Raippaluoto | 2017 |
| Greendeli Oy | Vantaa | 2006 |
| Greener Packaging Finland Oy | Ulvila | 2021 |
| Greenergia Oy | Piikkiö | 2019 |
| Greenfox Oy | Ylämylly | 1997 |
| Greenful Finland OY | Helsinki | 2020 |
| Greengrip Oy | Oulu | 2011 |
| Greenkone Oy | Espoo | 2011 |
| Greenland Technology Oy Ltd | Padasjoki | 2021 |
| Greenlux Lighting Solutions Oy | Helsinki | 2007 |
| Greenmatex Oy | Kristiinankaupunki | 2021 |
| Greenmotive Oy | Espoo | 2023 |
| Greenshield Finland Oy | Lahti | 2009 |
| Greenwe Oy | Turku | 2020 |
| Greif Sweden Aktiebolag, Finland Branch | | 2024 |
| Greittek Oy | Kauhajoki As | 1988 |
| Grejo Oy | Tampere | 2011 |
| Gresantti Ky | Evijärvi | 1996 |
| Grevest Group Oy | Espoo | 2019 |
| Greyford Atlas Oy | Helsinki | 2026 |
| Greystone Service Oy | Veteli | 2024 |
| Grid Solutions Oy | Tampere | 1999 |
| Grido Oy | Tampere | 2021 |
| Griffo Media Oy | Helsinki | 2014 |
| Grills & Friends Oy | Sundsberg | 2021 |