| Garden Stirling Burnet Trustees Limited | Professional & scientific | 2015 |
| Garleton Lodge Limited | Hospitality | 2017 |
| Garleton Medical Limited | Health & social care | 2025 |
| GCO Haddington Limited | Health & social care | 2017 |
| Gentoo Properties Ltd | Real estate | 2022 |
| Georgian Apartments Ltd | Hospitality | 2006 |
| Getout Outdoor Learning CIC | Education | 2024 |
| GHS Loft Flooring Ltd | Construction | 2023 |
| Gibsons of Haddington Limited | Wholesale & retail | 2012 |
| Gifford Community Land Company | Arts & recreation | 2006 |
| Giffordgate Limited | Professional & scientific | 2018 |
| Glana Cosmetics Ltd | Wholesale & retail | 2021 |
| Glass Electrical Ltd | Construction | 2013 |
| Glenburn Capital Limited | Professional & scientific | 2025 |
| Glenfinlas Limited | Hospitality | 1998 |
| Globotechmart Limited | Wholesale & retail | 2025 |
| Golden Maine Limited | Financial services | 2026 |
| Goosegreenfilms and Photography Ltd | Information & communication | 2022 |
| Gosford Design Limited | Professional & scientific | 2023 |
| Grange Home Services Scotland Limited | Other services | 2013 |
| Green Shoots Accountancy Services Ltd | Professional & scientific | 2011 |
| Greyfriar Communications Limited | Information & communication | 2010 |
| Gylemuir (Brown) Limited | Real estate | 2020 |
| Gylemuir Capital Limited | Real estate | 2010 |
| H and K Enterprises Limited | Mining & quarrying | 1987 |
| H and K Estates Limited | Real estate | 2012 |
| H C D Winter & Sons Ltd | Manufacturing | 2022 |
| HA Ngoc Nguyen Ltd | Other services | 2026 |
| Haddington Citizens Advice Bureau | Information & communication | 2010 |
| Haddington House Limited | Real estate | 2020 |
| Haddington Investments Ltd | Real estate | 2025 |
| Haddington Property Company Limited | Real estate | 2025 |
| Haddington Retail Ltd | Wholesale & retail | 2022 |
| Haddington Retail Unit Ltd | Wholesale & retail | 2023 |
| Haddington Villa X Ltd | Hospitality | 2023 |
| Haddstock C.I.C. | Arts & recreation | 2018 |
| Hamilton and Kinneil (Archerfield) Limited | Professional & scientific | 1995 |
| Hamilton and Kinneil Estates Limited | Real estate | 1987 |
| Hamilton Farming Enterprises Limited | Agriculture & fishing | 1987 |
| Handsel Press Limited (the) | Information & communication | 1971 |
| Haydean Investments Limited | Real estate | 2022 |
| Health Psychology Scotland Ltd | Health & social care | 2023 |
| Hearthside Consulting Limited | Professional & scientific | 2026 |
| Heavy Sound C.I.C. | Education | 2015 |
| Helm Project Management Limited | Information & communication | 2009 |
| Herons Weir Ltd | Wholesale & retail | 2021 |
| Heyaye Ltd | Information & communication | 2026 |
| Highland Glen Trust Corporation Limited | Extraterritorial | 2007 |
| Hilton Nursing & Homecare Agency Limited | Health & social care | 2000 |
| Homes for Life Housing Partnership | Real estate | 1998 |
| Homes for Life Plus Limited | Real estate | 1998 |
| Hot Head Scotland Limited | Other services | 2013 |
| HQE M+E Limited | Construction | 2025 |
| Huntington Estate Limited | Hospitality | 2015 |
| HWR Property Holdings Limited | Real estate | 2026 |
| Hyperion Consulting Group Limited | Real estate | 2017 |
| Immaculatetan Ltd | Wholesale & retail | 2025 |
| Impactsinsight Ltd | Professional & scientific | 2023 |
| Imrie's Garden Solutions Ltd. | Administrative & support | 2016 |
| Independent Intelligence Ltd | Professional & scientific | 2018 |
| Infinite Global Consultancy Ltd | Information & communication | 2024 |
| Intent Marquees LLP | | 2012 |
| Iris Developments (Scotland) Ltd | Real estate | 2019 |
| Ironing Maids Ltd | Other services | 2026 |
| Irvines Home Hardware Ltd | Wholesale & retail | 2012 |
| ITS Calculated Ltd | Professional & scientific | 2013 |
| Iyasu Healthcare & Medical Education Limited | Health & social care | 2024 |
| Iyasu Limited | Manufacturing | 2019 |
| J & S Roofing Ltd | Construction | 2021 |
| J and J Anderson Property Limited | Real estate | 2025 |
| J&M Graham Limited | Wholesale & retail | 2011 |
| Jamie Brewster Trading Limited | Financial services | 2013 |
| Jamieson Financial Planning Ltd | Financial services | 2016 |
| JC Becher Ltd | Health & social care | 2019 |
| Jedburgh Retail Ltd | Wholesale & retail | 2025 |
| JH Campbell Property Consultants Ltd. | Real estate | 2008 |
| Jinkie Spring Water Limited | Water & waste | 2008 |
| JPS Ventilation Ltd | Manufacturing | 2026 |
| Jrxpharm Limited | Wholesale & retail | 2019 |
| Kangaroo Auctions Limited | Administrative & support | 2007 |
| Kangaroo Holdings Limited | Professional & scientific | 2007 |
| Kangaroo Self Storage Limited | Transport & logistics | 2004 |
| Karele Ltd | Education | 2013 |
| Kevin Mackenzie Architecture and Design Ltd | Professional & scientific | 2017 |
| KEYSTONE1 Ltd | Real estate | 2025 |
| Kick on Events Limited | Arts & recreation | 2021 |
| Kilcheran Ltd | Professional & scientific | 2026 |
| KLS Decorators Limited | Other services | 2019 |
| Koppla Ltd | Wholesale & retail | 2019 |
| Kukoon Homes (West Thorntoun) Ltd | Construction | 2018 |
| Kurys Developments Limited | Professional & scientific | 2014 |
| KXM Tax Advisory Limited | Professional & scientific | 2022 |
| Lamb-Troy Financial Services Ltd | Financial services | 2025 |
| Lammer Engineering Ltd | Manufacturing | 2014 |
| Lamp House Music Ltd | Education | 2025 |
| Lamp House Properties Ltd | Real estate | 2025 |
| Lawn Care (Edinburgh) Limited | Administrative & support | 2020 |
| LB Active Limited | Health & social care | 2017 |
| Lennoxlove Farming Company | | 1981 |
| Lennoxlove House Limited | Arts & recreation | 1987 |