| Gibson Logistics (Scotland) Ltd. | Other services | 2019 |
| Giftdeals Ltd | Wholesale & retail | 2021 |
| Gilsenan Partners Limited | Administrative & support | 2014 |
| Girdle Toll OUT of School Care | Health & social care | 2000 |
| Girdle Toll Stores Limited | Wholesale & retail | 2013 |
| GJM Power Limited | Energy | 2022 |
| GK Cuisine Ltd | Hospitality | 2018 |
| Glamorised Company Ltd | Other services | 2024 |
| Glasgow Creative Design & Print Ltd | Manufacturing | 2008 |
| Glassgo Ltd | Manufacturing | 2022 |
| Gleci Ltd | Construction | 2019 |
| Global Park Holdings Limited | Hospitality | 2022 |
| GM Instruments Limited | Manufacturing | 1992 |
| GMC Corsehill Ltd. | Wholesale & retail | 1990 |
| Go Vending (Scotland East) Ltd | Hospitality | 2014 |
| Go Vending (Scotland) Ltd | Hospitality | 2012 |
| Godfather Fastfood Ltd | Hospitality | 2021 |
| Goldberry Construction Limited | Extraterritorial | 2021 |
| Good Digital Practice Ltd | Information & communication | 2024 |
| GP Souvenirs Limited | Wholesale & retail | 2019 |
| Grassroots Fine Flowers Ltd | Other services | 2018 |
| Green Energy Scotland C.I.C. | Energy | 2020 |
| Green Home Group Limited | Financial services | 2016 |
| Green Home Holdings Limited | Financial services | 2020 |
| Green Home Systems Limited | Construction | 2014 |
| Greenline Training Consultants Ltd | Education | 2015 |
| GRO AYR Limited | Hospitality | 2021 |
| GRO Coffee (Holdings) Limited | Financial services | 2019 |
| GRO Coffee Bars Limited | Real estate | 2025 |
| GRO Coffee Limited | Hospitality | 2015 |
| GRO Three Limited | Hospitality | 2024 |
| GRS Direct Ltd | Transport & logistics | 2026 |
| GS Commerce Ltd | Wholesale & retail | 2019 |
| GSM Management Services (Ayrshire) Ltd | Administrative & support | 2017 |
| Gulliland Property Ltd | Real estate | 2025 |
| Guru Hair and Beauty Ltd | Other services | 2021 |
| Gusmaintain Ltd | Mining & quarrying | 2021 |
| GWC Home Improvement Ltd | Professional & scientific | 2018 |
| Gyros Tavernaki Ltd | Hospitality | 2024 |
| H&K Hotels Group Limited | Real estate | 2022 |
| Hales (Scotland) Limited | Construction | 2017 |
| Hamza Khan ENT Limited | Wholesale & retail | 2022 |
| Handi Logistics (Ayrshire) Ltd | Transport & logistics | 2018 |
| Hannah Media Ltd | Professional & scientific | 2019 |
| Happy Mechanics Ltd | Wholesale & retail | 2025 |
| Harbour Guest House (Irvine) Ltd | Hospitality | 2021 |
| Harbour Lights Irvine Limited | Hospitality | 2023 |
| Harley Haulage Ltd | Transport & logistics | 2017 |
| Harrison Hair & Beauty (Ayrshire) Ltd | Other services | 2019 |
| Hasim Barbers Limited | Other services | 2021 |
| Hayley Mcgeachie Ltd | Real estate | 2019 |
| HDD (Scotland) Ltd | Transport & logistics | 2026 |
| Heathergems Limited | Professional & scientific | 1970 |
| Heritage Developments (Ayrshire) Limited | Construction | 2000 |
| Heymojo Limited | Professional & scientific | 2026 |
| HF Irvine Hotel Limited | Hospitality | 2017 |
| Hhi&D Ltd | Construction | 2020 |
| Hidden TCG Ltd | Manufacturing | 2026 |
| High Armsheugh Ltd | Extraterritorial | 2022 |
| Highland Stag Ltd | Construction | 2025 |
| Highlander Floors Ltd | Construction | 2022 |
| Hilary Jane Keyes Ltd | Manufacturing | 2017 |
| Hingezero Ltd | Information & communication | 2025 |
| HK Carlton Hotel Limited | Arts & recreation | 2023 |
| HK Fenwick Limited | Hospitality | 2019 |
| HK Furniture Ltd | Wholesale & retail | 2017 |
| HMC Assets Ltd. | Extraterritorial | 1969 |
| HMC Construction (Scotland) Ltd | Construction | 2016 |
| Hollywood Nails Irvine Ltd | Other services | 2025 |
| Home Delivery and Distribution (Scotland) Ltd | Transport & logistics | 2024 |
| Hot WOK Irvine Ltd | Hospitality | 2026 |
| HRB Inspections & Testing Ltd | Professional & scientific | 2025 |
| HRL Property Ltd | Real estate | 2025 |
| HSN Global Limited | Wholesale & retail | 2024 |
| HSN Home Store Ltd | Wholesale & retail | 2026 |
| HT Roofing and Cladding Solutions Limited | Construction | 2019 |
| Hugh K. Gillies (Construction Engineering Services) Limited | Construction | 1978 |
| Hugh Merchant Property Ltd | Real estate | 2024 |
| Hume Engineering Ltd | Administrative & support | 2019 |
| Hurricane Mouldings Ltd | Manufacturing | 2013 |
| Hyper Store UK Ltd | Wholesale & retail | 2025 |
| Ibrahim Traders Ltd | Wholesale & retail | 2022 |
| Icon Building Envelope Group Ltd | Construction | 2025 |
| Iconic Catering Ltd | Hospitality | 2025 |
| Iconic Rental Properties Ltd | Real estate | 2025 |
| Ifusion Systems Limited | Manufacturing | 2025 |
| IN Phase Electrical Engineering Ltd | Construction | 2014 |
| Inchinnan PO Limited | Wholesale & retail | 2016 |
| Infinity Automation Limited | Professional & scientific | 2009 |
| Innovated Design Solutions Ltd | Professional & scientific | 2018 |
| Insulclad Ltd | Construction | 2026 |
| Intoit Studios Limited | Professional & scientific | 2015 |
| Inver Myles Ltd | Hospitality | 2021 |
| Irvine 1967 Limited | Extraterritorial | 2013 |
| Irvine Accommodation Ltd | Hospitality | 2022 |
| Irvine Barbers Ltd | Other services | 2024 |
| Irvine Bay Ltd | Hospitality | 2021 |
| Irvine Cycles Limited | Wholesale & retail | 1967 |
| Irvine Eats Limited | Hospitality | 2023 |
| Irvine Garden Centre Limited | Hospitality | 2018 |