| East Kent Hospitals University NHS Foundation Trust | Central government | 36 | 0 | £489,520,000 |
| Forestry and Land Scotland | Central government | 130 | 4 | £486,606,016 |
| Telford and Wrekin Council | Local authority | 93 | 10 | £486,204,001 |
| The Common Services Agency (more commonly known as NHS National Services Scotland) (NSS) | NHS & health | 292 | 1 | £485,000,019 |
| Bolton Council | Local authority | 110 | 3 | £483,440,465 |
| Trafford Council | Local authority | 102 | 0 | £482,550,412 |
| Watford Borough Council | Local authority | 65 | 1 | £482,413,000 |
| METROPOLITAN THAMES VALLEY HOUSING | not classified | 25 | 0 | £481,130,000 |
| Caerphilly County Borough Council | Local authority | 306 | 11 | £479,218,820 |
| Rhondda Cynon Taf CBC | Other public body | 310 | 1 | £477,093,678 |
| NHS Humber and North Yorkshire Integrated Care Board (ICB) | NHS & health | 193 | 0 | £476,715,148 |
| Powys County Council | Local authority | 245 | 6 | £474,996,075 |
| Business Services Organisation | not classified | 124 | 0 | £471,921,818 |
| University of Sussex | Education | 139 | 1 | £469,730,000 |
| Maritime and Coastguard Agency | Central government | 181 | 1 | £467,911,410 |
| West Berkshire District Council | Local authority | 129 | 0 | £467,189,448 |
| eTenderwales | not classified | 9 | 0 | £463,603,752 |
| Bracknell Forest Council | Local authority | 128 | 4 | £462,925,834 |
| NHS North East London Integrated Care Board | Central government | 260 | 0 | £462,449,125 |
| NHS Bristol North Somerset & South Gloucestershire Integrated Care Board | Central government | 132 | 0 | £459,707,412 |
| London Borough of Bromley | Local authority | 240 | 2 | £457,480,372 |
| LiveWest Homes Limited | Other public body | 113 | 1 | £448,166,333 |
| The Common Services Agency (more commonly known as Public Services Delivery Scotland) (PSD Scotland) | not classified | 80 | 6 | £448,153,887 |
| CADENT GAS LIMITED | Other public body | 89 | 4 | £445,223,903 |
| Liverpool City Region Combined Authority | Local authority | 148 | 3 | £440,369,938 |
| The Secretary of State for the Home Department | Central government | 16 | 0 | £438,854,540 |
| East London Waste Authority | Other public body | 8 | 0 | £437,702,180 |
| University Hospitals of North Midlands NHS Trust | Central government | 123 | 3 | £437,539,505 |
| Catalyst Housing Limited | not classified | 16 | 0 | £435,974,000 |
| Winchester City Council | Local authority | 28 | 0 | £434,108,000 |
| Driver and Vehicle Licensing Agency | Central government | 92 | 0 | £430,506,156 |
| Thameslink Southern Great Northern Limited (TSGN) | Other public body | 85 | 3 | £427,526,171 |
| 7 Force Commercial Services | not classified | 35 | 0 | £414,303,168 |
| Cross Keys Homes | Other public body | 13 | 0 | £413,062,500 |
| Dover Harbour Board | Other public body | 67 | 2 | £411,350,000 |
| East West Rail Company Limited | Central government | 26 | 0 | £410,720,140 |
| Able Humber Ports Limited | not classified | 2 | 0 | £410,000,000 |
| East Of England NHS Collaborative Hub c/o West Suffolk NHS Foundation Trust | Central government | 68 | 1 | £408,395,000 |
| Greater London Authority | not classified | 62 | 1 | £408,275,949 |
| NHS Hampshire and Isle of Wight Integrated Care Board | Central government | 87 | 0 | £408,246,974 |
| Slough Borough Council | Local authority | 106 | 0 | £405,748,543 |
| Cantium Business Solutions Limited | not classified | 21 | 0 | £401,680,000 |
| Swansea University | Education | 161 | 2 | £396,884,734 |
| NHS Property Services Limited | NHS & health | 498 | 0 | £394,709,719 |
| London Borough of Merton | Local authority | 143 | 3 | £394,450,780 |
| Welsh Government | not classified | 159 | 0 | £394,383,603 |
| Transport for Wales | Other public body | 133 | 0 | £391,253,573 |
| NHS Cornwall and Isles of Scilly ICB | NHS & health | 6 | 0 | £390,535,000 |
| Transport for Wales Rail Limited (Utility Buyer) | Other public body | 164 | 2 | £389,439,885 |
| Lancashire and South Cumbria NHS Foundation Trust | Central government | 15 | 0 | £385,938,000 |
| Prifysgol Bangor / Bangor University | Education | 85 | 2 | £385,334,066 |
| Tramtrack Croydon Limited | not classified | 1 | 0 | £385,000,000 |
| Merseytravel | Other public body | 104 | 1 | £382,116,453 |
| Chief Constable for Devon and Cornwall Police | Police & fire | 44 | 0 | £379,668,146 |
| The Guinness Partnership | Other public body | 199 | 0 | £376,371,235 |
| University of Strathclyde | Education | 261 | 1 | £374,916,346 |
| Derby City Council | Local authority | 363 | 2 | £360,199,371 |
| Department for Culture, Media and Sport | Central government | 72 | 1 | £360,175,000 |
| BLACKPOOL COUNCIL | Local authority | 232 | 4 | £356,541,043 |
| Bedford Borough Council | Local authority | 255 | 4 | £356,041,616 |
| Perth & Kinross Council | Local authority | 89 | 3 | £355,676,084 |
| Places for London Limited | Other public body | 28 | 1 | £353,941,750 |
| Pembrokeshire County Council | Local authority | 185 | 3 | £353,939,683 |
| Somerset NHS Foundation Trust | Central government | 415 | 1 | £352,529,100 |
| Financial Conduct Authority | not classified | 231 | 0 | £348,278,166 |
| Mid and South Essex NHS Foundation Trust | Central government | 274 | 1 | £346,489,623 |
| University of Ulster | Education | 99 | 0 | £345,813,330 |
| Wessex Water Services Ltd | Other public body | 10 | 0 | £345,000,000 |
| OPEN UNIVERSITY(THE) | Education | 247 | 0 | £342,733,999 |
| Business Energy and Industrial Strategy | not classified | 36 | 0 | £341,110,000 |
| Department for Business & Trade | Central government | 329 | 0 | £340,625,298 |
| London Borough of Bexley | Local authority | 219 | 2 | £337,604,000 |
| DfI Transport and Road Asset Management (TRAM) | Central government | 38 | 0 | £335,629,055 |
| Falkirk Council | Local authority | 130 | 7 | £333,871,002 |
| LATIMER DEVELOPMENTS LTD | Other public body | 31 | 0 | £333,500,000 |
| East of England Ambulance Service NHS Trust | Central government | 69 | 1 | £332,598,000 |
| Battlefield Tactical Communications Systems, Stategic Command, Defence Digital, Ministry of Defence | Central government | 1 | 0 | £330,000,000 |
| Tees Valley Combined Authority | Local authority | 346 | 2 | £328,859,300 |
| NORTH EAST LINCOLNSHIRE COUNCIL | Local authority | 197 | 3 | £328,753,862 |
| Great Yarmouth Borough Council | Local authority | 86 | 2 | £324,854,750 |
| Onward Group Limited | Other public body | 73 | 0 | £324,429,987 |
| Epping Forest District Council | Local authority | 50 | 1 | £323,545,334 |
| Guildford Borough Council | Local authority | 74 | 1 | £320,826,333 |
| Aberdeenshire Council | Local authority | 142 | 1 | £320,621,613 |
| The Food Standards Agency | Central government | 224 | 2 | £320,169,140 |
| NHS England and NHS Improvement | NHS & health | 8 | 0 | £319,250,000 |
| Sunderland City Council | Local authority | 300 | 4 | £318,076,973 |
| Westmorland and Furness Council | Local authority | 868 | 1 | £318,041,673 |
| Welwyn Hatfield Borough Council | Local authority | 79 | 1 | £317,124,000 |
| Leeds City Council - PACS | Local authority | 101 | 1 | £316,601,540 |
| Knowsley Council | Local authority | 159 | 0 | £314,290,820 |
| Stonewater Limited | Other public body | 113 | 1 | £314,204,049 |
| NHS Cambridgeshire and Peterborough Integrated Care Board | Central government | 27 | 0 | £313,677,912 |
| VIVID Housing Ltd | Charity | 106 | 3 | £313,371,000 |
| NHS Birmingham and Solihull Integrated Care Board | Central government | 195 | 3 | £312,019,644 |
| Health Education England | not classified | 917 | 0 | £309,994,209 |
| Rooftop Housing Group | Housing | 22 | 0 | £307,638,000 |
| Ashford Borough Council | Local authority | 99 | 1 | £306,444,300 |
| Northern Housing Consortium Ltd | not classified | 8 | 0 | £306,000,000 |
| South Central Ambulance Service NHS Foundation Trust | Central government | 32 | 0 | £304,930,000 |