| Olimp Technologies LP | | 2015 |
| Olimpus BIZ LP | | 2015 |
| Olinteractive 1 LP | | 2002 |
| Olior LP | | 2013 |
| Oliphant Investments SP | | 2000 |
| Oliphants Properties Ltd. | Real estate | 1979 |
| Olistika Ltd | Information & communication | 2026 |
| Oliva Group LP | | 2017 |
| Olivai Services Ltd | Administrative & support | 2025 |
| Olive Blossom Limited | Wholesale & retail | 2024 |
| Olive Bough Ltd | Hospitality | 2017 |
| Olive Holdings Limited | Financial services | 2005 |
| Olive Jones Limited | Wholesale & retail | 2016 |
| Olive Juice Ltd | Hospitality | 2024 |
| Olive Systems LP | | 2016 |
| Olive Toast Software Ltd | Information & communication | 2006 |
| Olivebell Construction Ltd | Construction | 2024 |
| Olivee Healthcare Ltd | Administrative & support | 2023 |
| Oliven Taxi Ltd | Transport & logistics | 2023 |
| Oliver and Charlie Limited | Wholesale & retail | 2016 |
| Oliver Chapman Architects Limited | Professional & scientific | 2006 |
| Oliver Howie Design and Build Ltd | Construction | 2025 |
| Oliver Pearce Consulting Limited | Professional & scientific | 2026 |
| Olivewood Kitchens and Joinery Ltd | Manufacturing | 2024 |
| Olivia Cooper Jewellery Limited | Wholesale & retail | 2020 |
| Olivia Mclaren, Ltd. | Professional & scientific | 2014 |
| Olivia Trade LP | | 2015 |
| Olivium Investments Limited | Real estate | 2021 |
| Ollenvord Sales LP | | 2015 |
| Ollie & IVY Flowers Ltd | Wholesale & retail | 2021 |
| Ollie & JO, Pet Haven Ltd | Wholesale & retail | 2024 |
| Ollio Business LP | | 2017 |
| Ollyhaven Ltd | Hospitality | 2025 |
| OLM Inc LP | | 2017 |
| Olmec 3 Amigos Ltd | Hospitality | 2026 |
| Olmix LP | | 2015 |
| Olmo Real Estate Advisers Limited | Administrative & support | 2023 |
| Oloniya Investment LP | | 2020 |
| Olsenbanden Holding Ltd | Financial services | 2026 |
| Olsson Cabs Ltd. | Professional & scientific | 2001 |
| OLT Builders Ltd | Construction | 2025 |
| OLT Design LP | | 2013 |
| Oltenia Capital LP | | 2016 |
| Oltex Inter LP | | 2012 |
| Olton Global Holdings Corporation LP | | 2016 |
| Olton Projects Limited | Professional & scientific | 2014 |
| Olucore NEO LP | | 2017 |
| Olvinura Trading LP | | 2014 |
| Olympos Transshipment Services LP | | 2015 |
| Olympus Group L.P. | | 2015 |
| Olympus Mons Limited | Information & communication | 2026 |
| OM & Ojas Properties Limited | Real estate | 2021 |
| OM Facade Ltd | Construction | 2023 |
| OM Heavy Lift Ltd | Construction | 2017 |
| OM Namah Sivay Ltd | Hospitality | 2025 |
| OM Properties (Scot) Ltd | Real estate | 2025 |
| Omaq Integrated Limited | Wholesale & retail | 2025 |
| Omar Quaba Limited | Health & social care | 2019 |
| Ombetja Yehinga Organisation (Scotland) | Education | 2010 |
| Ombre Consulting Ltd | Information & communication | 2022 |
| OMC Partners Limited | Professional & scientific | 2013 |
| Omega Associates LP | | 2015 |
| Omega Business LP | | 2015 |
| Omega Chemicals L.P. | | 2009 |
| Omega Cool LP | | 2016 |
| Omega Corp LP | | 2014 |
| Omega Diagnostics Limited | Manufacturing | 1987 |
| Omega Electrical Works Ltd | Construction | 2025 |
| Omega Elegant LP | | 2015 |
| Omega Export LP | | 2015 |
| Omega Global Power LP | | 2015 |
| Omega Industries L.P. | | 2012 |
| Omega JL LP | | 2014 |
| Omega Lift Services Limited | Construction | 2003 |
| Omega Maintenance and Brickwork Ltd | Construction | 2024 |
| Omega Management LP | | 2015 |
| Omega Organisation L.P. | | 2010 |
| Omega Skye Partners | | 2007 |
| Omega Studio LP | | 2016 |
| Omega Support LP | | 2015 |
| Omega Trans Global LP | | 2015 |
| Omer Cars Limited | Transport & logistics | 2014 |
| Omero Ltd | Professional & scientific | 2022 |
| OMH Edinburgh Ltd | Health & social care | 2013 |
| Omhari Property Investors Limited | Real estate | 2026 |
| Omicron Consulting International Limited | Professional & scientific | 2016 |
| Omilan Productions Limited | Administrative & support | 2024 |
| Ominiops Limited | Wholesale & retail | 2024 |
| Omirra Ltd | Wholesale & retail | 2025 |
| Omkar Training Ltd | Education | 2026 |
| Ommica Limited | Professional & scientific | 2019 |
| Omnessio Export LP | | 2013 |
| Omni Bits Limited | Wholesale & retail | 2020 |
| Omni Centre Cafe Barbera Ltd | Hospitality | 2025 |
| Omni Construction (Edin) Ltd | Construction | 2025 |
| Omni Elevate CI Partner LP | | 2023 |
| Omni Equity (Scots) LP | | 2016 |
| Omni Glove Limited | Manufacturing | 2023 |
| Omni Grenada CI Partner LP | | 2023 |
| Omni HR Solutions Limited | Information & communication | 2011 |