| 1 | Nuclear Liabilities Fund Limited | £5.61bn | 1 |
| 2 | British Gas Trading Limited | £3.04bn | 8 |
| 3 | Edf Energy Customers Limited | £2.44bn | 25 |
| 4 | E.On Next Energy Limited | £2.17bn | 8 |
| 5 | Ovo Energy Ltd | £1.49bn | 6 |
| 6 | British Broadcasting Corporation | £1.38bn | 16 |
| 7 | Octopus Energy Limited | £1.34bn | 8 |
| 8 | Scottishpower Energy Retail Limited | £1.20bn | 10 |
| 9 | Totalenergies Gas & Power Limited | £835.2m | 6 |
| 10 | Sse Energy Supply Limited | £755.4m | 6 |
| 11 | Npower Commercial Gas Limited | £704.3m | 6 |
| 12 | Octopus Energy Operations Limited | £608.2m | 7 |
| 13 | Drax Energy Solutions Limited | £554.4m | 6 |
| 14 | Octopus Energy Operations 2 Limited | £530.0m | 2 |
| 15 | Power Ni Energy Limited | £405.5m | 14 |
| 16 | Computacenter Plc | £321.9m | 1 |
| 17 | Social Investment Business Foundation | £312.6m | 5 |
| 18 | Electricity Plus Supply Limited | £309.9m | 6 |
| 19 | Utilita Energy Limited | £303.3m | 8 |
| 20 | Places For People Group Limited | £299.4m | 43 |
| 21 | Platform Housing Group Limited | £287.9m | 33 |
| 22 | Pozitive Energy Ltd | £273.7m | 8 |
| 23 | Abri Group Limited | £264.4m | 26 |
| 24 | Corona Energy Retail 4 Limited | £262.9m | 6 |
| 25 | Cell Therapy Catapult Limited | £250.4m | 46 |
| 26 | Saros Research Limited | £244.0m | 39 |
| 27 | Smartestenergy Limited | £240.5m | 6 |
| 28 | Kier Construction Limited | £239.9m | 15 |
| 29 | Bowmer & Kirkland (London) Limited | £233.4m | 3 |
| 30 | Clarion Housing Association Limited | £231.4m | 41 |
| 31 | Brook Green Trading Limited | £230.9m | 3 |
| 32 | National Association Of Citizens Advice Bureaux(The) | £230.2m | 24 |
| 33 | Nexus Rail Ltd | £224.9m | 7 |
| 34 | Engie Power Limited | £220.8m | 7 |
| 35 | Sefe Energy Limited | £212.1m | 6 |
| 36 | Sse Airtricity Energy Supply (Ni) Limited | £182.8m | 13 |
| 37 | Greensquareaccord Limited | £180.6m | 47 |
| 38 | Centre For Process Innovation Limited | £173.4m | 157 |
| 39 | The Guinness Partnership Limited | £173.3m | 67 |
| 40 | Karbon Homes Limited | £170.6m | 88 |
| 41 | Vistry Homes Limited | £169.5m | 18 |
| 42 | The Education Endowment Foundation | £164.7m | 10 |
| 43 | Vivid Housing Limited | £162.1m | 22 |
| 44 | Bryt Energy Limited | £157.5m | 6 |
| 45 | The University Of Manchester | £156.3m | 840 |
| 46 | Jisc | £154.0m | 26 |
| 47 | Connected Places Catapult | £150.7m | 65 |
| 48 | G.M.C.A. Limited | £150.4m | 17 |
| 49 | Imperial Wharf (Block C) Limited | £149.5m | 18 |
| 50 | Shell Energy Uk Limited | £143.7m | 6 |
| 51 | Canal & River Trust | £143.5m | 49 |
| 52 | Wates Construction Limited | £141.2m | 10 |
| 53 | Uk Sports Institute Limited | £137.8m | 66 |
| 54 | Finance Birmingham Limited | £134.0m | 1 |
| 55 | High Value Manufacturing Catapult | £133.7m | 29 |
| 56 | Nexus (Uk) Limited | £132.4m | 2 |
| 57 | Torus62 Limited | £129.2m | 54 |
| 58 | Rolls-Royce Plc | £128.2m | 84 |
| 59 | Thirteen Housing Group Limited | £127.8m | 100 |
| 60 | Longhurst Group Limited | £126.8m | 68 |
| 61 | Emh Housing & Regeneration Limited | £126.6m | 93 |
| 62 | Bam Construction Limited | £125.9m | 2 |
| 63 | The Football Foundation | £123.4m | 10 |
| 64 | So Energy Trading Limited | £118.0m | 2 |
| 65 | Sovereign Network Group | £111.4m | 123 |
| 66 | University Of Warwick | £110.4m | 257 |
| 67 | University Of Sheffield | £109.9m | 377 |
| 68 | Skills For Care Ltd | £107.2m | 21 |
| 69 | Ecorys Uk Limited | £107.1m | 12 |
| 70 | Aytac Foods Limited | £105.3m | 7 |
| 71 | Digital Catapult | £104.6m | 82 |
| 72 | Uk Battery Industrialisation Centre Ltd | £104.6m | 24 |
| 73 | Engie Gas Limited | £101.8m | 5 |
| 74 | Legal & General Affordable Homes Limited | £100.7m | 16 |
| 75 | Royal Society | £100.0m | 8 |
| 76 | The Manufacturing Technology Centre Limited | £99.4m | 143 |
| 77 | Aster Communities | £99.1m | 15 |
| 78 | Ecotricity Limited | £98.8m | 11 |
| 79 | Police Digital Service | £96.7m | 5 |
| 80 | Walk Wheel Cycle Trust | £96.4m | 16 |
| 81 | Uk Community Foundations | £95.4m | 68 |
| 82 | Livewest Homes Limited | £95.3m | 58 |
| 83 | University Of Exeter | £90.6m | 243 |
| 84 | London & Quadrant Housing Trust | £89.7m | 12 |
| 85 | Rail Safety And Standards Board Limited | £88.2m | 7 |
| 86 | Galliford Try Construction Limited | £87.0m | 4 |
| 87 | Wythenshawe Community Housing Group Limited | £86.9m | 125 |
| 88 | University Of Nottingham (The) | £85.6m | 142 |
| 89 | British Red Cross Society | £84.2m | 81 |
| 90 | Loughborough University Enterprises Limited | £82.0m | 243 |
| 91 | Capita Business Services Ltd | £80.4m | 1 |
| 92 | Tilbury Douglas Construction Limited | £79.0m | 6 |
| 93 | The Careers And Enterprise Company | £78.9m | 7 |
| 94 | The Riverside Group Limited | £78.8m | 102 |
| 95 | Regent Gas Limited | £77.6m | 5 |
| 96 | Caa International Limited | £77.4m | 12 |
| 97 | Crown Agents Bank Limited | £76.5m | 10 |
| 98 | Cambridge Education Limited | £76.1m | 2 |
| 99 | Milton Keynes Development Partnership Llp | £74.3m | 9 |
| 100 | Mccarthy & Stone (Shared Ownership) Limited | £72.5m | 12 |