| NHS Commissioning Board | Other | 1 | £16m | 27.3% | 2016-04-29 |
| SUPPLY CHAIN COORDINATION LIMITEDNew | Other | 2 | £11m | 19.1% | 2025-11-10 |
| COUNTESS OF CHESTER HOSPITAL NHS FOUNDATION TRUST | Other | 1 | £8m | 12.9% | 2021-06-15 |
| NHS DEVON INTEGRATED CARE BOARDNew | Other | 1 | £6m | 10.2% | 2026-05-22 |
| NOE CPC | Other | 3 | £5m | 7.9% | 2018-08-20 |
| NHS SOMERSET INTEGRATED CARE BOARDNew | Other | 1 | £2m | 3.7% | 2026-03-12 |
| Community Health Partnerships Limited | Other | 1 | £2m | 3.3% | 2022-02-01 |
| Crown Commercial Service | Other | 1 | £2m | 3.3% | 2022-02-01 |
| THE PENNINE ACUTE HOSPITAL N H S TRUST | Other | 1 | £880k | 1.5% | 2017-02-20 |
| NHS HUMBER & NORTH YORKSHIRE ICBNew | Other | 1 | £735k | 1.3% | 2025-03-07 |
| London Universities Purchasing Consortium | Other | 1 | £714k | 1.2% | 2019-03-08 |
| DERBYSHIRE COMMUNITY HEALTH SERVICES NHS FOUNDATION TRUST | Other | 1 | £709k | 1.2% | 2022-07-24 |
| Simply Serve LtdNew | Other | 2 | £470k | 0.8% | 2026-02-02 |
| Cambridgeshire County Council | Other | 1 | £445k | 0.8% | 2018-09-28 |
| Dorset HealthCare University NHS Foundation Trust | Other | 1 | £363k | 0.6% | 2020-05-22 |
| Nottingham City Council | Other | 1 | £350k | 0.6% | 2017-01-17 |
| Nottinghamshire County Council | Other | 1 | £343k | 0.6% | 2018-11-23 |
| The Rotherham NHS Foundation Trust | Other | 1 | £310k | 0.5% | 2016-06-08 |
| NHS Norfolk and Waveney Integrated Care Board | Other | 1 | £233k | 0.4% | |
| Walsall Healthcare NHS Trust | Other | 1 | £222k | 0.4% | 2021-03-08 |
| South Warwickshire NHS Foundation Trust | Other | 1 | £200k | 0.3% | 2016-04-18 |
| THE UNIVERSITY OF BIRMINGHAM | Other | 3 | £176k | 0.3% | 2022-09-20 |
| Greater Manchester Combined Authority | Other | 1 | £140k | 0.2% | 2016-09-16 |
| South Yorkshire Police Headquarters | Other | 2 | £132k | 0.2% | 2021-08-18 |
| Royal Borough of Kingston Upon Thames | Other | 1 | £129k | 0.2% | 2017-06-27 |
| Nottingham Trent UniversityNew | Other | 2 | £125k | 0.2% | 2026-01-26 |
| ATAMIS LTD | Other | 1 | £113k | 0.2% | 2021-06-14 |
| Hertfordshire NHS Procurement | Other | 1 | £106k | 0.2% | 2017-03-28 |
| Bradford Metropolitan District Council | Other | 1 | £75k | 0.1% | 2017-08-10 |
| Berkshire Healthcare NHS Foundation Trust | Other | 1 | £65k | 0.1% | 2018-04-04 |
| UNIVERSITY OF SHEFFIELD | Other | 1 | £48k | 0.1% | 2016-03-01 |
| North East Lincolnshire Council | Other | 1 | £45k | 0.1% | 2019-01-31 |
| Avon and Wiltshire Mental Health Partnership NHS trust | Other | 1 | £36k | 0.1% | 2019-06-14 |
| BIRMINGHAM CHILDREN'S HOSPITAL NHS FOUNDATION TRUST | Other | 1 | £32k | 0.1% | 2019-02-19 |
| BIRMINGHAM CHILDRENS HOSPITAL | Other | 1 | £27k | 0.0% | 2018-01-17 |
| Leeds City Council | Other | 1 | £14k | 0.0% | 2019-03-27 |
| Mid and South Essex NHS Foundation Trust | Other | 3 | £0k | 0.0% | |
| University Hospitals Bristol and Weston NHS Trust | Other | 1 | £0k | 0.0% | |
| NI Practice and Education Council for Nursing and Midwifery | Other | 1 | £0k | 0.0% | |
| NHS SHARED BUSINESS SERVICES LIMITED | Other | 2 | £0k | 0.0% | |
| BELFAST HEALTH AND SOCIAL CARE TRUST | Other | 2 | £0k | 0.0% | |
| University of Glasgow | Other | 1 | £0k | 0.0% | |
| NI Ambulance Service Trust | Other | 2 | £0k | 0.0% | |