| Fishtank Creative Limited | Information & communication | 2007 |
| Fishtank Residential Ltd | Real estate | 2020 |
| Fix-A-Leak Limited | Construction | 2002 |
| FJH Accountancy Limited | Professional & scientific | 2024 |
| FJH Consultancy Limited | Professional & scientific | 2022 |
| FJH Holdings Limited | Financial services | 2024 |
| Flex Studios Ltd | Arts & recreation | 2025 |
| Flexicare Altruistic Solutions Limited | Health & social care | 2011 |
| Flexicare at Home Limited | Health & social care | 2013 |
| Flightstore Pilot Supplies Limited | Wholesale & retail | 2000 |
| Flockat Limited | Information & communication | 2020 |
| Flokk Limited | Manufacturing | 1997 |
| Flourish in Mind Ltd | Education | 2018 |
| Fluirse Holdings Ltd | Financial services | 2025 |
| Flying Magic Limited | Administrative & support | 2008 |
| Flypaper Limited | Professional & scientific | 2010 |
| Formula Power Manufacturing Limited | Manufacturing | 2018 |
| Foxroyd Avenue 1969 Limited | Extraterritorial | 2014 |
| Fragile Freight Limited | Information & communication | 1986 |
| Franklin Digital Ltd | Information & communication | 2025 |
| Freight Shuttle Limited | Professional & scientific | 1982 |
| French Parts Ltd | Wholesale & retail | 2024 |
| Frere Educational Trust | Education | 1930 |
| FTJ Campers Ltd | Administrative & support | 2022 |
| Future Properties (Northern) Ltd | Construction | 2013 |
| FXM Living Ltd | Construction | 2025 |
| G Mation Ltd | Professional & scientific | 2023 |
| G.M. Foot and Ankle Ltd | Health & social care | 2022 |
| Gaoth Wind Turbine LLP | | 2013 |
| Gavin Rhodes Landscapes Limited | Administrative & support | 2006 |
| Gear Change Consulting Ltd | Professional & scientific | 2015 |
| GEM Installs Limited | Construction | 2016 |
| Genki IT Services Limited | Information & communication | 2025 |
| Gentry Property Limited | Construction | 2016 |
| Geoff Spencer Consulting Limited | Professional & scientific | 2016 |
| GF Paintworks Ltd | Wholesale & retail | 2024 |
| Gigabox Developments Limited | Energy | 2018 |
| Gigabox NO 5 Limited | Energy | 2021 |
| Gillott Creative Ltd | Administrative & support | 2015 |
| GKO Limited | Professional & scientific | 2001 |
| Global Nitrogen Services Limited | Manufacturing | 2014 |
| Glowup Tanning Products Ltd | Wholesale & retail | 2025 |
| Golfologist Ltd | Wholesale & retail | 2026 |
| Goose Hill Private Day Nursery Ltd | Health & social care | 2023 |
| Grandrover Limited | Extraterritorial | 1963 |
| Granular Ltd | Administrative & support | 2013 |
| Graphic Technology (Supplies) Ltd | Professional & scientific | 2016 |
| Greek Grill Limited | Hospitality | 2021 |
| Greenside Projects Ltd | Construction | 2026 |
| Greenwood Painting Solutions Ltd | Administrative & support | 2024 |
| GRG Recruitment Limited | Administrative & support | 2009 |
| Griffiths Holdings Limited | Financial services | 2018 |
| Grosvenor Court (Surbiton) Management Limited | Households | 2001 |
| GSH Automation Limited | Administrative & support | 2007 |
| GSM Developments Limited | Construction | 2014 |
| GW Talentscout Ltd | Administrative & support | 2026 |
| H S Smithson Ltd | Real estate | 2021 |
| HA Civil & Structural Ltd | Professional & scientific | 2015 |
| Haigh Builders Limited | Construction | 2002 |
| Haigh Farm Shop Limited | Wholesale & retail | 1996 |
| Haigh Farms LLP | | 2025 |
| Haldenby Consulting Limited | Extraterritorial | 2019 |
| Hamilton & Barrett Limited | Administrative & support | 2020 |
| Hampton & Co Furniture Group Ltd | Financial services | 2025 |
| Hampton Furniture Group Limited | Financial services | 2025 |
| Hampton Property Group Holdings Limited | Financial services | 2024 |
| Hampton Property Investments Ltd | Real estate | 2019 |
| Handmade by Habiba Ltd | Administrative & support | 2023 |
| Handrail Safety Systems Ltd | Manufacturing | 2017 |
| Hansfin Advisory Limited | Professional & scientific | 2025 |
| Hanson Insurance Brokers Ltd | Financial services | 2015 |
| Hanson Streetwear Ltd | Wholesale & retail | 2024 |
| Hargreaves & Hargreaves Ltd | Professional & scientific | 2025 |
| Haribon Limited | Construction | 2019 |
| Harrison Properties (Yorkshire) Limited | Construction | 2017 |
| HAT Homes Limited | Real estate | 2021 |
| Hawthorn Woods Ltd | Real estate | 2026 |
| HBE Trio Holdings Limited | Financial services | 2025 |
| HBE Trio Properties Limited | Real estate | 2025 |
| HD Barbers Limited | Other services | 2023 |
| Headboards Collection Limited | Manufacturing | 2016 |
| Headhunters the Vibe Limited | Other services | 2023 |
| Health and Leisure Solutions Co (UK) Ltd | Other services | 2012 |
| Hennie Penny's Chicken Bar Ltd | Hospitality | 2018 |
| Hepworth Homes Limited | Real estate | 2017 |
| Hermetica Technologies Ltd | Manufacturing | 1983 |
| HFX Distribution Ltd | Transport & logistics | 2026 |
| HI Quality Properties Limited | Construction | 2003 |
| Highgrange Trading Limited | Real estate | 2017 |
| Hill of Lybster Wind Turbines LLP | | 2014 |
| Hillfort Sporting Ltd | Agriculture & fishing | 2019 |
| Hiltwood Limited | Manufacturing | 2025 |
| HK Medical Services Ltd | Health & social care | 2023 |
| Hodgson Motor Sports Limited | Wholesale & retail | 1998 |
| Hoey Care Ltd | Health & social care | 2014 |
| Hollingsworth Bros.,Limited | Extraterritorial | 1947 |
| Hollybank Trustees Limited | Professional & scientific | 2004 |
| Hollywood Agency Ltd | Administrative & support | 2016 |
| Holmfirth Dyers Holdings Limited | Financial services | 2016 |
| Holmfirth Dyers Limited | Manufacturing | 1987 |