| 2CATARTS Limited | March | 2014 |
| 2CRSI UK Ltd | Manchester | 2003 |
| 2D CNC Machinery Limited | Cardiff | 2009 |
| 2D Engineering Limited | Great Chart | 1992 |
| 2D Heat Productions Limited | Altrincham | 2016 |
| 2D Precision Limited | Angus | 1998 |
| 2D Security Systems Ltd | London | 2016 |
| 2D6UK Limited | Stockport | 2025 |
| 2D: 3D Limited | Middlesex | 1994 |
| 2DETAIL Ltd | Bideford | 2007 |
| 2DMATERIAL.MOVIE Ltd | Braintree | 2025 |
| 2DSURGICAL Limited | Bromsgrove | 2015 |
| 2EO Factory Ltd | Watford | 2015 |
| 2F Sauces Ltd | Blackburn | 2024 |
| 2FOUR Jewellers Ltd | Rotherham | 2021 |
| 2FUL Ltd | London | 2025 |
| 2G Products Limited | Aberdeen | 2006 |
| 2G Solutions (Scotland) Ltd | Lanark | 2021 |
| 2GD2KUT Limited | Essex | 2001 |
| 2GLF Ltd | Birmingham | 2024 |
| 2H1O Limited | Keighley | 2009 |
| 2HGEN Limited | Bristol | 2021 |
| 2IDESIGNS (London) Limited | Richmond | 2012 |
| 2IG Ltd | Farnborough | 2018 |
| 2JGRAPHICS Limited | Bicester | 2012 |
| 2JUICE Ltd | London | 2020 |
| 2K Aviation Services Ltd | Kilmarnock | 2021 |
| 2K Customs Ltd | Inverness | 2014 |
| 2K Perfection Ltd | London | 2020 |
| 2K Polymer Systems Limited | Alfreton | 2007 |
| 2K'S Engineering Limited | Uckfield | 2018 |
| 2KG of Chocolate Ltd | Manchester | 2025 |
| 2KL Cleaning Limited | London | 2023 |
| 2KM (UK) Limited | Birmingham | 1998 |
| 2KSM Holdings Limited | Bedworth | 2014 |
| 2M Cafe and Cuisine Ltd | Windsor | 2026 |
| 2M Design & Print Ltd | Southampton | 2011 |
| 2M Equest Limited | Consett | 1997 |
| 2M Manufacturing Limited | Runcorn | 1972 |
| 2M Press Limited | Huddersfield | 2007 |
| 2M Systems Ltd | East Grinstead | 2025 |
| 2MC Holdings Limited | Bradford | 2016 |
| 2MOTOUK Ltd | York | 2020 |
| 2N Machinery Ltd | London | 2025 |
| 2ND Chance Items Ltd | Chertsey | 2019 |
| 2ND Floor Loft Conversions Limited | Barnet | 2004 |
| 2ND Heart Ltd | London | 2021 |
| 2ND Level Global Solutions Limited | Bicester | 2016 |
| 2ND Nature Dental Design Ltd. | Newtownabbey | 2015 |
| 2NIGHT Events Ltd | Southall | 2006 |
| 2POINTFIX Ltd | London | 2026 |
| 2POSH2PULL Ltd | Broadstairs | 2021 |
| 2PRMASTERS Ltd | Colchester | 2017 |
| 2PRO Ice Skate Ltd | Wells | 2026 |
| 2PSP Limited | Edinburgh | 2025 |
| 2PURE Products (Distribution) Limited | Newcastle Upon Tyne | 2011 |
| 2RM Brands Ltd | Ashford | 2023 |
| 2RSYSTEMS Ltd | Romsey | 2022 |
| 2SAM22 Group UK Ltd | London | 2018 |
| 2SIZE UK Ltd | Ilford | 2025 |
| 2SOM Ltd | Stowmarket | 2018 |
| 2SPACE Ltd | London | 2016 |
| 2TC Limited | Arundel | 2002 |
| 2TEES Afrocaribbean Foods Ltd | Andover | 2020 |
| 2TURNT Ltd | London | 2025 |
| 2TWENTY4 Ltd | London | 2025 |
| 2U4U Ltd | Pontardawe | 2019 |
| 2ULTD Limited | Newton Abbot | 2015 |
| 2WIN Engineering Ltd | Bagillt | 2013 |
| 2X4 Workshop Limited | Cambridge | 2024 |
| 2XCELL Limited | Doncaster | 2020 |
| 2XGL Ltd | Bristol | 2019 |
| 2ZERO2 Racing Ltd | Wellington | 2026 |
| 3 1 Fibres Ltd | London | 2020 |
| 3 B'S Yorkshire Limited | Leeds | 2017 |
| 3 Bear Design Limited | Wetherby | 2023 |
| 3 Brothers Fencing & Landscaping Ltd | Woking | 2025 |
| 3 Bru's Brewing Company Ltd | Bishop'S Stortford | 2018 |
| 3 Counties Concrete Ltd | Hatfield | 2020 |
| 3 D Aluminium Plas Limited | Eynsham Witney | 1973 |
| 3 D Motorsport Limited | Ruthin | 2005 |
| 3 Dental Manufacturing Ltd | Durham | 2018 |
| 3 Dimensional Limited | West Bromwich | 2001 |
| 3 FFF Limited | Corby | 2007 |
| 3 Fingers Ltd | Stevenage | 2016 |
| 3 in 1 Sofa Wall Beds Ltd | London | 2024 |
| 3 in a Sack Limited | London | 2014 |
| 3 K'S Engineering Company Limited | Machynys | 1975 |
| 3 Legged Thing Limited | Hemel Hempstead, | 2010 |
| 3 Lids RUM Ltd | Liverpool | 2017 |
| 3 Little Desserts Limited | Belfast | 2017 |
| 3 MAG Limited | Kidwelly | 2017 |
| 3 MMS Limited | London | 2009 |
| 3 Ohms Ltd | Lowestoft | 2005 |
| 3 PAW Crafts Ltd | Salisbury | 2023 |
| 3 Peaks Bakehouse Ltd | Settle | 2024 |
| 3 Peaks Brewing Co Ltd | Kidderminster | 2025 |
| 3 Phase and Control Limited | Preston | 2005 |
| 3 Phase Holdings Ltd | London | 2025 |
| 3 Pyramids Group Ltd | Leicester | 2024 |