| GYG Pharma Solutions Ltd | Canterbury | 2023 |
| Gyggl Limited | North Ferriby | 2011 |
| GYJ Management Ltd | Coventry | 2013 |
| Gym Demon Ltd | Wrexham | 2025 |
| Gym Elites Clothing Limited | London | 2024 |
| Gym Engineers (U.K.) Ltd | Maesteg | 2021 |
| Gym Life Europe Limited | Peterborough | 2012 |
| Gym Outfit Ltd | Cardiff | 2019 |
| Gym Parts Limited | Brynmenyn Industrial Estate | 2017 |
| Gym Progress Ltd | Edinburgh | 2025 |
| Gym Services Ltd | Nuneaton | 2018 |
| Gym Twin Limited | Buckhurst Hill | 2024 |
| Gym. Co. Asia Limited | Stafford | 2007 |
| Gymfit (N.I.) Limited | Ballymena | 2023 |
| Gymfix Ltd | Barnsley | 2026 |
| Gymgear Limited | Preston | 2020 |
| Gymkarma Ltd | Peterborough | 2017 |
| Gymkit Limited | Whittlesey | 2008 |
| Gymkit UK Limited | Whittlesey | 2008 |
| Gymmersive Ltd | London | 2017 |
| Gymnastics Scotland Ltd | Edinburgh | 2011 |
| Gymologie Ltd | London | 2021 |
| Gymready Limited | Mansfield | 2023 |
| Gymstarr Ltd | London | 2001 |
| Gymtec Fitness Limited | Dereham | 2016 |
| Gymtherapy Ltd | Whalley | 2020 |
| Gymz Ltd | Wolverhampton | 2023 |
| Gynecomastia Medics UK Limited | St. Albans | 2020 |
| Gyobventures Limited | Waltham Cross | 2024 |
| Gypsea Yachting Limited | London | 2022 |
| Gypsum Fire Protection Ltd | Waterlooville | 2024 |
| Gypsum Investments Limited | Leicestershire | 1966 |
| Gypsy Spirit Ltd | Bristol | 2023 |
| Gyste Ltd | Weybridge | 2007 |
| GZ Silver Jeans Trading Co., Ltd | London | 2022 |
| GZ Spring Trading Co., Ltd. | London | 2023 |
| GZ United Ltd | Bransholme | 2018 |
| GZ Virtual School Limited | Feltham | 2024 |
| GZ Zhan LI Trdg Ltd | Beckenham | 2023 |
| GZR Ltd | Bracknell | 2025 |
| H & B (Builders Merchants) Limited | Surrey | 1952 |
| H & B Homes Ltd | Middlesbrough | 2024 |
| H & D Developments Limited | Liverpool | 2006 |
| H & G Holdings '93 Ltd | Buckhurst Hill | 2018 |
| H & G Trading Limited | Maesteg | 2009 |
| H & G Wilde Funeral Directors Limited | Sutton Coldfield | 2002 |
| H & H Dental Practices Limited | Shrewsbury | 2014 |
| H & H Holdings (Newbury) Limited | Newbury | 2003 |
| H & H Investment Management Ltd | Edinburgh | 2012 |
| H & H Refrigeration Limited | | 1980 |
| H & L Contracts Ltd | Skelmersdale | 2009 |
| H & L London Ltd | London | 2009 |
| H & L Motors (Twickenham) Limited | Middlesex | 2006 |
| H & L Scotland Ltd | Gullane | 2022 |
| H & M Construction (N.I.) Ltd | Craigavon | 2008 |
| H & N Studios Limited | Salisbury | 2024 |
| H & Partners Global Vision Limited | London | 2015 |
| H & S Electrical Ltd | Penarth | 2023 |
| H & S Signs Ltd | Brierley Hill | 2011 |
| H & S Simmons Limited | Cambridge | 2014 |
| H & S Supply Chain Solutions Ltd | Ashton-Under-Lyne | 2023 |
| H & V Controls Limited | Newbury | 1972 |
| H & V Properties Limited | Devon | 2011 |
| H (Coventry) Limited | Salford | 2012 |
| H (Warrington) Limited | Stockton-On-Tees | 2012 |
| H + L Hydraulic Limited | Surrey | 1974 |
| H a Accountants Ltd | London | 2012 |
| H a Chaudry Limited | London | 2018 |
| H a Maxwell Management Limited | Bury | 2016 |
| H a S Limited | Manchester | 2006 |
| H and T Industrial Co., Ltd | Beckenham | 2023 |
| H C Robinson & Sons Limited | Beverley | 1990 |
| H C Secretarial Limited | Surrey | 2004 |
| H C Solutions Limited | Market Rasen | 2009 |
| H Cabinetry & Woodwork Ltd | Orpington | 2026 |
| H Cope & Sons (Holdings) Limited | Grimsby | 2009 |
| H Curtis Ltd | Taunton | 2022 |
| H D Field Limited | Burton-On-Trent | 1955 |
| H D S Bauorg. Limited | London | 2014 |
| H D Vision Limited | London | 1999 |
| H E Controls Limited | Southport | 2005 |
| H E J O'Brien Limited | Dorchester | 2003 |
| H Events & Staging Limited | Worcester | 2021 |
| H Foster & Co (Stearines) Limited | Reading | 2012 |
| H G H (V S) Limited | Bristol | 2007 |
| H H B Limited | Diss | 1977 |
| H H Business Services Limited | Birmingham | 2013 |
| H H Treasury Management Limited | Rainworth, Mansfield | 2020 |
| H Hunt Property Ltd | Leighton Buzzard | 2021 |
| H J C Specialist Coatings Limited | Gateshead | 2022 |
| H J T (Winchester) Limited | Eastleigh | 2006 |
| H Johnson & Sons Ltd | Sutton Coldfield | 2009 |
| H Knot Limited | Wellingborough | 2012 |
| H Kuhnke Limited | Andover | 2013 |
| H L (2) Ltd | Glasgow | 2017 |
| H L H Forwarding Limited | Bradford | 2005 |
| H L Plastics Limited | Denby, Ripley | 2005 |
| H M North Limited | Carlisle | 2017 |
| H N a Facilities Limited | Manchester | 2005 |
| H N S Cart Limited | Edinburgh | 2021 |