| Higher Dimension Media Limited | Ilford | 2013 |
| Higher Lydgate Park Management Company Limited | Oldham | 1987 |
| Higher Pathways Ltd | Bury | 2021 |
| Higher Safety & Training Solutions Limited | Manchester | 2014 |
| Higher Sandhills Farm Limited | Yeovil | 2022 |
| Highfield (Saffron Walden) Care Limited | London | 1986 |
| Highfield 1964 Limited | Holmfirth | 2013 |
| Highfield 1973 Limited | North Berwick | 2014 |
| Highfield Amenity 2 Limited | Teignmouth | 2011 |
| Highfield Bath Limited | Bath | 2025 |
| Highfield Business Park (Management) Limited | Eastbourne | 2006 |
| Highfield Fabrics Limited | Ilford | 2024 |
| Highfield Funeral Service Limited | Sutton Coldfield | 1959 |
| Highfield House (Crawley) Management Company Limited | London | 1996 |
| Highfield Mills Limited | Mitcham | 1924 |
| Highfield PFI Holdco Limited | Preston | 2010 |
| Highfield Place 1969 Limited | Newcastle Upon Tyne | 2015 |
| Highfield Plant Hire Limited | Walsall | 2005 |
| Highfield Racing Limited | Chorley | 2017 |
| Highfield Tunnelling Company Limited | Norwich | 1984 |
| Highfinesse-Uk Limited | Weybridge | 2013 |
| Highflyer Trading Company Limited | Ely | 2012 |
| Highgate (Walsall) Management Company Limited | New Milton | 2000 |
| Highgate 1971 Limited | Chester Le Street | 2014 |
| Highgate Art School Ltd | London | 2020 |
| Highgate Drive 1962 Limited | Leicester | 2014 |
| Highgrove Group (Belgravia Living) Limited | Leeds | 2015 |
| Highland Ascents Limited | Wilmslow | 2016 |
| Highland Bay Limited | Tetbury | 2011 |
| Highland Christmas Trees Limited | Inverness | 1995 |
| Highland Citizens Advice Bureau Limited | Inverness | 2009 |
| Highland Construction Equipment Limited | Nairn | 2018 |
| Highland Contractors Limited | Bexhill | 2007 |
| Highland Country Retreats Limited | Elgin | 1999 |
| Highland Custom Pens Ltd | Thurso | 2016 |
| Highland Event Services Limited | Tain | 2023 |
| Highland Garden Limited | London | 2020 |
| Highland Glen Trust Corporation Limited | Haddington | 2007 |
| Highland Graduation Pens Ltd | Thurso | 2016 |
| Highland Home Industries Limited | Dumfriesshire | 1976 |
| Highland Laser Engraving Ltd | Thurso | 2016 |
| Highland Locksmiths & Security Systems Limited | Inverness | 1998 |
| Highland Lodge Rental Ltd | Ellon | 2018 |
| Highland London Ltd | London | 2024 |
| Highland Maintenance Limited | Bexhill On Sea | 2011 |
| Highland Meats Ltd | Glasgow | 2012 |
| Highland Motorrad Ltd | Invergordon | 2024 |
| Highland Paranormal Ltd | Inverness | 2023 |
| Highland Rapeseed OIL Limited | Tain | 2011 |
| Highland Rope Access Limited | Glasgow | 2012 |
| Highland Scaffolding Services Limited | Aberdeen | 1991 |
| Highland Sunshine Technology Co., Ltd. | Coventry | 2018 |
| Highland Swimming Academy Ltd | Thurso | 2016 |
| Highland Timber Buildings Ltd. | Forres | 2004 |
| Highland Wedding Pens Ltd | Thurso | 2016 |
| Highland Whisky Chocolates Ltd | Golspie | 2019 |
| Highland-Escape Limited | Glasgow | 2018 |
| Highlander Systems Ltd | Lancing | 2020 |
| Highlands and Islands Travel Limited | Watford Hertfordshire | 1989 |
| Highlands Cars Ltd | Nantwich | 2015 |
| Highlands Direct Limited | Peak National Park | 1998 |
| Highleat Properties Limited | Manchester | 1967 |
| Highlevel Properties Limited | Enfield | 2024 |
| Highlight Electrical Technology Co., Ltd | Beckenham | 2018 |
| Highline Consulting Ltd | London | 2010 |
| Highline Property Maintenance Limited | Aberdeen | 2021 |
| Highlogic Limited | Manchester | 1999 |
| Highmast Construction Limited | Manchester | 2017 |
| Highness Energy Capital Ltd. | London | 2021 |
| Highnet Telecom Limited | Inverness | 2001 |
| Highpine Limited | London | 2000 |
| Highreel Limited | Bridgend | 2025 |
| Highridge Green Management Company Limited | Bristol | 2007 |
| Highshield Limited | Enfield | 1995 |
| Highspec Accountants Limited | Whitstable | 2019 |
| Highspec Trading Limited | Ilford | 2010 |
| Highspot Enterprises Limited | London | 2008 |
| Highstone Limited | Barnet | 2014 |
| Highstreet 1966 Limited | Scunthorpe | 2013 |
| Highteen Group Co., Ltd | Stafford | 2014 |
| Hightouch Limited | Ashtead | 2010 |
| Hightown Developments Limited | London | 1991 |
| Hightownhill Ltd | Southampton | 2019 |
| Hightrees Media Ltd | London | 2013 |
| Highui Import & Export Co., Ltd | Kenilworth | 2017 |
| Highview Court Management (NI) Limited | Co Antrim | 1991 |
| Highview Farm Stables Limited | Poulton Le Fylde | 2000 |
| Highview Hydrogen Limited | London | 2009 |
| Highview Power Limited | London | 2019 |
| Highware Limited | London | 1996 |
| Highwater Estates Ltd | Tarporley | 2013 |
| Highway & Drainage Products Ltd | Telford | 2010 |
| Highway Services Limited | Colchester | 2008 |
| Highway Stops Limited | Hertfordshire | 1989 |
| Highway Support Limited | Goole | 2007 |
| Highway Windscreens (UK) Limited | Oldham | 1995 |
| Highways Alliance Limited | Scunthorpe | 2010 |
| Highways England Company Limited | Birmingham | 2021 |
| Highwood Estates Limited | Cardiff | 2024 |
| Highworth Financial Services Limited | Wiltshire | 1986 |