| Cultural Documents CIC | Professional & scientific | 2019 |
| Cuppa Cofaidh Company Ltd | Hospitality | 2026 |
| Curach Limited | Professional & scientific | 2012 |
| D C Plumbing and Heating (Scotland) Limited | Construction | 2024 |
| D Cairns Ltd | Professional & scientific | 2019 |
| D Haggart Services Ltd | Administrative & support | 2021 |
| D J Campbell Joinery Ltd | Manufacturing | 2017 |
| D M Mackinnon Ltd | Professional & scientific | 2012 |
| D Mcauley Property Ltd | Real estate | 2025 |
| D&B Construction Services Ltd | Construction | 2025 |
| D'Arcy Diving Ltd | Construction | 2007 |
| D-Mac Haulage Ltd | Transport & logistics | 2021 |
| D-Mac Services Argyll Limited | Manufacturing | 2016 |
| Dastardly Mutts Ltd | Other services | 2024 |
| David Finlayson Limited | Real estate | 1984 |
| Dawat Oban Ltd | Hospitality | 2025 |
| DBW Estates Limited | Real estate | 2025 |
| DC West Coast Construction Ltd | Professional & scientific | 2022 |
| Derek Wilson Carriers Ltd | Transport & logistics | 2020 |
| Development Support Crew Limited | Professional & scientific | 2024 |
| Diabetes Flight Projects Ltd | Administrative & support | 2010 |
| Dickie Musdale Windfarm Limited | Energy | 2014 |
| Digital Land Surveys Limited | Professional & scientific | 2007 |
| Dimac Limited | Real estate | 2003 |
| Discovery Line Limited | Transport & logistics | 2023 |
| DMR Systems Limited | Health & social care | 2017 |
| Donald Macdonald Funeral Directors Limited | Other services | 2015 |
| Drimnin Community Broadband C.I.C. | Information & communication | 2017 |
| Drimnin Timber Transport Limited | Transport & logistics | 2020 |
| Drimvargie Properties Limited | Construction | 2003 |
| Drochaid Ruaidh Limited | Hospitality | 2017 |
| Dunadd Community Enterprise | Other services | 2018 |
| Dunbeg Stores Limited | Wholesale & retail | 2019 |
| Dundas Entertainment Limited | Arts & recreation | 2017 |
| Dungallan Country House Ltd | Real estate | 2020 |
| Dunollie Halls Limited | Real estate | 2023 |
| Dunollie Projects Limited | Administrative & support | 2007 |
| Dunstaffnage Marine Services Limited | Administrative & support | 2003 |
| DWS Associates Limited | Professional & scientific | 2019 |
| Dynamic Electronics Limited | Professional & scientific | 2016 |
| E.D.M. Plant Hirer & Contractor Limited | Construction | 2005 |
| Eaglestack Limited | Construction | 2008 |
| Easdale Island Trading Company Limited | Other services | 2003 |
| Easdale Seafoods Limited | Wholesale & retail | 1990 |
| Easdale Seafoods Trading Limited | Financial services | 2024 |
| Easdale Slate & Marble Co Ltd | Extraterritorial | 2011 |
| Easdale Village Shop Limited | Wholesale & retail | 2003 |
| Econotel Ltd. | Hospitality | 2011 |
| Ederline Holdings Ltd | Real estate | 2021 |
| Eeusk and Piazza Limited | Hospitality | 2016 |
| Eite Hotels Ltd | Hospitality | 2025 |
| Electrotech Marine Limited | Other services | 2008 |
| Element Adventure Sports Ltd | Wholesale & retail | 2020 |
| Elite Contractors Scotland Ltd | Construction | 2019 |
| Elite Fitness Oban Ltd | Arts & recreation | 2025 |
| Emile DE Alfons & Co Ltd | Hospitality | 2021 |
| Engm Ltd | Administrative & support | 2026 |
| EO & IM Holding Limited | Financial services | 2024 |
| Epicure Competitions Ltd | Arts & recreation | 2026 |
| Eriska Enterprises Limited | Hospitality | 1999 |
| Esplanade West (Oban) Limited | Hospitality | 1977 |
| Etive Boat Trips Limited | Transport & logistics | 2022 |
| Etive Hospitality Limited | Hospitality | 2012 |
| Etive Sheds Limited | Manufacturing | 2023 |
| European Centre for Marine Biotechnology | Professional & scientific | 2000 |
| Evanshen Limited | Administrative & support | 1990 |
| Evolution Document Management Ltd | Information & communication | 2025 |
| Ewamargareta Limited | Health & social care | 2025 |
| Experts Franco Space Ltd | Information & communication | 2023 |
| Extinction Rebellion | Other services | 2021 |
| Family Mediation Argyll & Bute | Health & social care | 2002 |
| Fantasia Beauty Boutique & MED Spa Limited | Health & social care | 2024 |
| Farsain Marine Ltd | Transport & logistics | 2020 |
| Fashven Croft Limited | Hospitality | 2022 |
| Feel Good Gym Limited | Arts & recreation | 2019 |
| Felicissima Care Limited | Health & social care | 2023 |
| Feochan Limited | Administrative & support | 2012 |
| Feochan Property Limited | Real estate | 2024 |
| Ferguson Subsea Ltd | Manufacturing | 2025 |
| Ferry Media Ltd | Information & communication | 2025 |
| Finlay Carmichael PT Ltd | Education | 2021 |
| Fire Door Inspection Scotland Ltd | Professional & scientific | 2022 |
| Fishy Fishy Limited | Hospitality | 2023 |
| Fiuran Franchising Limited | Construction | 2010 |
| Fiuran Holding Ltd | Financial services | 2026 |
| Fiuran Property Ltd | Real estate | 2022 |
| FKM Business Consultant UK Ltd | Extraterritorial | 2024 |
| Flit Self Drive Limited | Administrative & support | 2003 |
| Floorshop (Oban) Ltd | Wholesale & retail | 2009 |
| FM Properties and Lettings Limited | Real estate | 2023 |
| Forest, Field & Glen Limited | Wholesale & retail | 2020 |
| Forss Creative Ltd | Professional & scientific | 2025 |
| Forteith Refrigeration & Heat Pump Solutions Limited | Manufacturing | 2012 |
| Fradharc Ltd. | Wholesale & retail | 2008 |
| Fusion Fit Ltd | Arts & recreation | 2025 |
| FX3 Properties Ltd | Construction | 2023 |
| G Laird (Heating & Plumbing) Ltd. | Construction | 2003 |
| G M S Enterprises Ltd. | Water & waste | 2001 |
| G MOR Properties Limited | Real estate | 2023 |
| G Whitelaw Argyll Audit Limited | Professional & scientific | 2025 |