| London Universities Purchasing Consortium | Other | 7 | £93m | 24.5% | 2025-12-04 |
| The Police and Crime Commissioner for WiltshireNew | Other | 1 | £43m | 11.4% | 2026-03-09 |
| The Litmus Partnership Ltd | Other | 15 | £19m | 5.0% | 2019-07-22 |
| Kent County Council | Other | 2 | £15m | 4.0% | 2022-07-08 |
| OPEN UNIVERSITY(THE) | Other | 2 | £11m | 2.9% | 2025-06-18 |
| Meridian Academies Trust | Other | 2 | £11m | 2.9% | 2023-05-30 |
| East Sussex County Council | Other | 3 | £10m | 2.7% | 2021-05-01 |
| Espo | Other | 11 | £9m | 2.4% | 2025-01-23 |
| Grwp Llandrillo Menai | Other | 1 | £7m | 2.0% | 2023-07-19 |
| South East Consortium | Other | 2 | £7m | 1.8% | 2023-12-18 |
| City College Norwich | Other | 2 | £6m | 1.6% | 2025-06-04 |
| SE Shared Services | Other | 1 | £5m | 1.4% | 2020-07-14 |
| Fusion21 Members ConsortiumNew | Other | 2 | £5m | 1.4% | 2025-04-15 |
| Plymouth City Council | Other | 3 | £5m | 1.4% | 2023-06-21 |
| Bohunt Education Trust | Other | 1 | £5m | 1.3% | 2023-02-01 |
| Wrexham Glyndwr University | Other | 2 | £5m | 1.2% | 2024-10-11 |
| Northern Housing Consortium Ltd | Other | 2 | £4m | 1.1% | 2024-04-18 |
| Central and Cecil Housing Trust | Other | 1 | £4m | 1.1% | 2020-10-30 |
| South Thames College Group | Other | 3 | £4m | 1.0% | 2023-05-19 |
| Newham College of Further Education | Other | 2 | £4m | 1.0% | 2022-03-24 |
| Futura Learning Partnership | Other | 1 | £3m | 0.9% | 2024-05-21 |
| Luton CouncilNew | Other | 2 | £3m | 0.8% | 2025-09-24 |
| South Western Ambulance Service NHS Foundation Trust | Other | 1 | £3m | 0.8% | 2016-08-16 |
| Coventry - Solihull - Warwickshire | Other | 1 | £3m | 0.7% | 2019-12-24 |
| Weston CollegeNew | Other | 1 | £3m | 0.7% | 2024-08-06 |
| VIVID | Other | 2 | £3m | 0.7% | 2022-08-10 |
| MAG AIRPORT LIMITEDNew | Other | 1 | £2m | 0.6% | 2026-01-30 |
| Suffolk Academies Trust | Other | 2 | £2m | 0.6% | 2023-07-24 |
| The Northumberland Church of England Academy | Other | 1 | £2m | 0.6% | 2020-11-03 |
| Middlesbrough College | Other | 1 | £2m | 0.6% | 2020-02-13 |
| North Warwickshire and South Leicestershire CollegeNew | Other | 1 | £2m | 0.6% | 2024-06-25 |
| Yorkshire Housing Limited | Other | 2 | £2m | 0.6% | 2022-08-31 |
| Liverpool City Council | Other | 1 | £2m | 0.5% | 2019-08-28 |
| UNIVERSITY OF GLOUCESTERSHIRE | Other | 1 | £2m | 0.5% | 2018-05-15 |
| Wokingham Borough Council | Other | 1 | £2m | 0.5% | 2020-01-06 |
| The Pinnacle Learning Trust | Other | 1 | £2m | 0.5% | 2022-06-27 |
| Morley College Limited | Other | 1 | £2m | 0.5% | 2023-09-07 |
| Wiltshire College | Other | 1 | £2m | 0.5% | 2023-07-26 |
| Tyne Coast CollegeNew | Other | 2 | £2m | 0.5% | 2024-07-22 |
| The Rainbow Multi Academy Trust ~ Cleaning TenderNew | Other | 1 | £2m | 0.5% | 2025-07-11 |
| Caldicot School | Other | 2 | £2m | 0.5% | 2023-10-23 |
| West Midlands Ambulance Service | Other | 2 | £2m | 0.5% | 2021-08-25 |
| North Wales Fire and Rescue ServiceNew | Other | 2 | £2m | 0.5% | 2025-04-11 |
| The Bridge MAT LtdNew | Other | 2 | £2m | 0.4% | 2025-09-19 |
| Roseland Multi Academy Trust | Other | 4 | £2m | 0.4% | 2023-06-06 |
| Uttlesford District CouncilNew | Other | 2 | £2m | 0.4% | 2025-12-18 |
| Barnet and Southgate College | Other | 2 | £2m | 0.4% | 2021-12-13 |
| Leicester City Council | Other | 1 | £1m | 0.4% | 2021-12-15 |
| Truro and Penwith College | Other | 1 | £1m | 0.4% | 2022-03-02 |
| East Anglian Schools Trust | Other | 2 | £1m | 0.4% | 2020-11-10 |
| Bedford Borough Council | Other | 1 | £1m | 0.4% | 2023-11-28 |
| United Endeavour Trust | Other | 1 | £1m | 0.4% | 2022-09-01 |
| Liverpool Community College | Other | 1 | £1m | 0.4% | 2018-07-05 |
| West Sussex County CouncilNew | Other | 1 | £1m | 0.3% | 2025-04-04 |
| Felpham Community CollegeNew | Other | 1 | £1m | 0.3% | 2025-02-07 |
| Paradigm Trust | Other | 1 | £1m | 0.3% | 2021-11-22 |
| Blackpool Council | Other | 1 | £1m | 0.3% | 2018-07-10 |
| Burntwood SchoolNew | Other | 1 | £1m | 0.3% | 2025-03-04 |
| Liverpool School of Tropical Medicine | Other | 2 | £1m | 0.3% | 2021-05-31 |
| Celtic Cross Education | Other | 1 | £1m | 0.3% | 2020-05-27 |
| TRURO & PENWITH ACADEMY TRUST | Other | 2 | £960k | 0.3% | 2021-06-28 |
| Swindon Borough CouncilNew | Other | 1 | £957k | 0.3% | 2026-04-27 |
| LEAP Multi Academy Trust | Other | 1 | £951k | 0.2% | 2018-08-09 |
| South Devon College | Other | 1 | £950k | 0.2% | 2018-07-16 |
| The Ecclesbourne School | Other | 1 | £913k | 0.2% | 2021-03-31 |
| WESTCOUNTRY SCHOOLS TRUST | Other | 2 | £904k | 0.2% | 2021-03-12 |
| Cheshire Constabulary on behalf of the Police and Crime Commissioner for Cheshire | Other | 1 | £900k | 0.2% | 2021-04-01 |
| Redruth School | Other | 1 | £900k | 0.2% | 2020-05-05 |
| Tricon Catering Consultancy | Other | 1 | £900k | 0.2% | 2017-07-14 |
| Notre Dame High School | Other | 2 | £896k | 0.2% | 2023-10-31 |
| Hertfordshire County Council - Resources | Other | 1 | £850k | 0.2% | 2022-08-05 |
| Southport College | Other | 1 | £846k | 0.2% | 2021-08-25 |
| Bernicia Group | Other | 3 | £831k | 0.2% | 2022-08-23 |
| Devon County Council | Other | 2 | £800k | 0.2% | 2020-02-25 |
| UNIVERSITY OF MANCHESTER | Other | 1 | £800k | 0.2% | 2018-07-09 |
| Pension Protection Fund | Other | 3 | £793k | 0.2% | 2022-03-10 |
| King Edward VII Academy | Other | 1 | £771k | 0.2% | 2020-01-16 |
| Hazelwick, Steyning Grammar and Worthing High Schools | Other | 1 | £769k | 0.2% | 2019-05-29 |
| Science Museum Group | Other | 1 | £767k | 0.2% | 2016-07-01 |
| University of Plymouth | Other | 1 | £734k | 0.2% | 2017-09-20 |
| The Sutton Academy | Other | 1 | £720k | 0.2% | 2020-11-03 |
| YPO | Other | 1 | £720k | 0.2% | 2017-08-21 |
| PENAIR SCHOOL | Other | 2 | £716k | 0.2% | 2023-06-09 |
| Fairfax Multi Academy Trust | Other | 1 | £643k | 0.2% | 2018-08-09 |
| Durrington Multi Academy Trust | Other | 1 | £629k | 0.2% | 2020-01-30 |
| Information Commissioners Office (ICO) | Other | 1 | £616k | 0.2% | 2019-06-24 |
| Hertfordshire NHS Procurement | Other | 1 | £600k | 0.2% | 2020-12-08 |
| Hampton Academies Trust | Other | 2 | £550k | 0.1% | 2020-12-15 |
| Wootton Academy Trust | Other | 1 | £516k | 0.1% | 2021-06-21 |
| Shaftesbury School | Other | 1 | £505k | 0.1% | 2020-02-05 |
| Worcester City Council | Other | 2 | £500k | 0.1% | 2024-01-16 |
| Durringhton High School | Other | 1 | £496k | 0.1% | 2017-02-07 |
| The Pensions Regulator | Other | 1 | £495k | 0.1% | 2023-02-09 |
| De La Salle School | Other | 1 | £480k | 0.1% | 2020-09-02 |
| STAR ACADEMIES | Other | 2 | £450k | 0.1% | 2022-05-12 |
| Roundwood Park | Other | 1 | £447k | 0.1% | 2022-09-01 |
| Wellsway Academy Trust | Other | 1 | £412k | 0.1% | 2019-06-07 |
| Chesterfield High School | Other | 1 | £399k | 0.1% | 2020-08-07 |
| Carshalton Boys Sports College | Other | 1 | £381k | 0.1% | 2016-05-20 |
| UNIVERSITY OF DERBY | Other | 2 | £357k | 0.1% | 2024-05-31 |
| Poynton High School | Other | 1 | £342k | 0.1% | 2018-08-09 |
| New Collaborative Learning Trust (NCLT) | Other | 1 | £340k | 0.1% | 2022-06-16 |
| University of Bath | Other | 1 | £324k | 0.1% | 2018-12-13 |
| Stoke Park School and Community College | Other | 1 | £300k | 0.1% | 2020-09-02 |
| University of PortsmouthNew | Other | 1 | £283k | 0.1% | 2024-11-23 |
| Miss | Other | 1 | £280k | 0.1% | 2019-09-10 |
| Harlow District Council | Other | 1 | £250k | 0.1% | 2017-09-20 |
| Torridge District Council | Other | 2 | £244k | 0.1% | 2022-09-14 |
| Bath and North East Somerset Council | Other | 1 | £240k | 0.1% | 2016-07-05 |
| The Richmond Upon Thames School | Other | 1 | £195k | 0.1% | 2020-06-12 |
| St Marys Catholic Primary School (Chesterfield) | Other | 1 | £188k | 0.0% | 2018-08-09 |
| Performances Birmingham Ltd | Other | 1 | £187k | 0.0% | 2017-12-21 |
| London Borough of Hounslow | Other | 1 | £166k | 0.0% | 2024-04-05 |
| Dorset & Wiltshire Fire and Rescue Authority | Other | 1 | £154k | 0.0% | 2021-03-26 |
| Parliamentary and Health Service Ombudsman | Other | 1 | £150k | 0.0% | 2022-04-12 |
| East Herts CouncilNew | Other | 1 | £150k | 0.0% | 2024-08-23 |
| The Commonweal School in Swindon | Other | 1 | £149k | 0.0% | 2019-11-11 |
| Northern Lighthouse Board | Other | 1 | £135k | 0.0% | 2019-12-11 |
| Equality and Human Rights Commission | Other | 2 | £134k | 0.0% | 2024-08-07 |
| Thorndown Primary School | Other | 1 | £131k | 0.0% | 2020-08-09 |
| Gateshead Council | Other | 1 | £122k | 0.0% | 2018-01-05 |
| Boston Borough CouncilNew | Other | 2 | £100k | 0.0% | 2026-02-03 |
| LGSS | Other | 1 | £100k | 0.0% | 2017-12-08 |
| Supply Hertfordshire | Other | 2 | £75k | 0.0% | 2018-08-21 |
| Homes England (the name adopted by the Homes and Communities Agency) | Other | 1 | £75k | 0.0% | 2019-07-01 |
| DVLA - Driver & Vehicle Licensing Agency | Other | 1 | £72k | 0.0% | 2021-05-24 |
| Woodley Town CouncilNew | Other | 1 | £67k | 0.0% | 2026-02-04 |
| Venture Multi Academy Trust | Other | 1 | £64k | 0.0% | 2020-08-02 |
| Walsall College | Other | 1 | £19k | 0.0% | 2019-08-15 |
| Devon and Somerset Fire and Rescue AuthorityNew | Other | 1 | £15k | 0.0% | 2025-10-23 |
| CRESCENT PURCHASING LIMITED | Other | 18 | £3k | 0.0% | 2021-09-03 |
| Nova Education Trust | Other | 1 | £0k | 0.0% | 2020-04-08 |
| Hampshire County Council | Other | 1 | £0k | 0.0% | 2017-10-23 |
| THE GUINNESS PARTNERSHIP LIMITEDNew | Other | 1 | £0k | 0.0% | 2026-05-07 |
| Sapientia Education TrustNew | Other | 1 | £0k | 0.0% | 2026-04-30 |
| Govia Thameslink Railway LimitedNew | Other | 1 | £0k | 0.0% | 2025-06-20 |
| ADVANTAGE SOUTHWEST LLP | Other | 1 | £0k | 0.0% | 2020-09-30 |
| MEDWAY COMMERCIAL GROUP LIMITED | Other | 1 | £0k | 0.0% | 2019-05-24 |
| John Paul II Multi Academy Trust | Other | 1 | £0k | 0.0% | 2019-02-07 |
| Medicines and Healthcare Products Regulatory Agency | Other | 1 | £0k | 0.0% | 2018-10-04 |
| The City of Liverpool College | Other | 1 | £0k | 0.0% | 2018-07-05 |
| Department for Work & Pensions | Other | 1 | £0k | 0.0% | 2018-06-20 |
| THE UNIVERSITY OF CUMBRIA | Other | 1 | £0k | 0.0% | 2018-04-30 |
| Ormiston Academies Trust (OAT) | Other | 2 | £0k | 0.0% | |
| University of Portsmouth Higher Education Corporation | Other | 1 | £0k | 0.0% | |
| Brigantia Learning Trust | Other | 1 | £0k | 0.0% | |
| NORTH WEST AMBULANCE SERVICE NHS TRUST | Other | 2 | £0k | 0.0% | |
| LIVEWEST HOMES LIMITED | Other | 2 | £0k | 0.0% | |
| BISHOP HOGARTH CATHOLIC EDUCATION TRUST | Other | 1 | £0k | 0.0% | |
| MERSEYRAIL ELECTRICS 2002 LIMITED | Other | 1 | £0k | 0.0% | |
| EFFICIENCY EAST MIDLANDS LIMITED | Other | 2 | £0k | 0.0% | |
| BANK OF ENGLAND | Other | 1 | £0k | 0.0% | |
| THE ACADEMIES FOR CHARACTER AND EXCELLENCE | Other | 1 | £0k | 0.0% | |
| Red Kite Alliance and associated schools | Other | 2 | £0k | 0.0% | |
| East and North Hertfordshire NHS Trust | Other | 1 | £0k | 0.0% | |
| LHC Procurement Group | Other | 1 | £0k | 0.0% | |
| Dorridge Primary School | Other | 1 | £0k | 0.0% | |
| Bournemouth Christchurch and Poole Council | Other | 2 | £0k | 0.0% | |
| Kent County Council (t/a KCS Procurement Services) | Other | 2 | £0k | 0.0% | |
| University of Leeds | Other | 1 | £0k | 0.0% | |
| Kent County Council (T/a as KCS Procurement Services) | Other | 1 | £0k | 0.0% | |
| North Western Universities Purchasing Consortium | Other | 1 | £0k | 0.0% | |
| Milton Keynes Council | Other | 1 | £0k | 0.0% | |
| Education | Other | 22 | £0k | 0.0% | |
| South East Coast Ambulance Service NHS Foundation Trust | Other | 2 | £0k | 0.0% | |
| Tower Hamlets | Other | 1 | £0k | 0.0% | |
| Broadland District Council | Other | 1 | £0k | 0.0% | |
| Govia Thameslink Rail (GTR) | Other | 2 | £0k | 0.0% | |
| Corporate Officer of the House of Commons | Other | 1 | £0k | 0.0% | |
| Wiltshire Council | Other | 1 | £0k | 0.0% | |
| ALETHEIA ACADEMIES TRUST | Other | 1 | £0k | 0.0% | |
| Medway Council | Other | 1 | £0k | 0.0% | |
| Procurement Assist Limited c/o Integrated Facilities Management Bolton Ltd (iFM Bolton) | Other | 1 | £0k | 0.0% | |
| Oasis Community Learning | Other | 1 | £0k | 0.0% | |
| CORNWALL EDUCATION LEARNING TRUST | Other | 1 | £0k | 0.0% | |
| Tunbridge Wells Borough Council | Other | 1 | £0k | 0.0% | |
| Woodard Academies Trust | Other | 1 | £0k | 0.0% | |
| BRISTOL & WESTON NHS PURCHASING CONSORTIUM | Other | 1 | £0k | 0.0% | |