| S-Comm | Rickmansworth |
| S. C. Johnson Ltd | Camberley |
| S4C | Cardiff |
| SA Brain & Co Ltd | Cardiff |
| Saab GB Ltd | Luton |
|
Saatchi Gallery | London |
| Saga Insurance | Folkestone |
| Sage UK Ltd | Newcastle upon Tyne |
| J. Sainsbury plc | London |
| Sally Lockyer Sports Promotion | Richmond |
| The Salmon & Trout Association | London |
| Samsung Electronics UK | Chertsey |
| Samurai Sportswear | Norwich |
| Sandcity Ltd (O'Neill Europe) | Northampton |
| Sandvik Holdings Ltd | Halesowen |
| Sanford Brands Parker Pen Company | Newhaven |
| Sanyo Europe Ltd | Watford |
| SAP (UK) Ltd | Feltham |
| Sapa Profiles Ltd | Alfreton |
| Sara Lee Household & Body Care (UK) Ltd | Slough |
| Savills plc | London |
|
Say Cheese UK Ltd | London |
| SBI | London |
| SCA Hygiene Products UK Ltd | Dunstable |
| Schools Amateur Boxing Association (SABA) | Watchet |
| Schroder Investment Management Ltd | London |
| Schwarzkopf Ltd | Aylesbury |
|
Science Museum | London |
|
The Science Of... | London |
| Scotia Radio Services Ltd | Glasgow |
| Scotland on Sunday, Edinburgh | Edinburgh |
| The Scotsman | Edinburgh |
| Scott Bader Co Ltd | Wellingborough |
| Scottish & Southern Energy plc | Perth |
| Scottish & Newcastle UK | Edinburgh |
| Scottish Anglers' National Association Ltd (SANA) | Kinross |
| Scottish Arts Council | Edinburgh |
| Scottish Athletics Ltd | Edinburgh |
| Scottish Auto-Cycle Union | Broxburn |
| Scottish Bowling Association (SBA) | Ayr |
| Scottish Business in the Community (SBC) | Edinburgh |
| Scottish Canoe Association (SCA) | Edinburgh |
|
Scottish Chamber Orchestra | Edinburgh |
| Scottish Citylink Coaches Ltd | Glasgow |
| Scottish Council for Voluntary Organisations (SCVO) | Edinburgh |
| Scottish Cycling | Edinburgh |
| Scottish Disability Sport (SDS) | Edinburgh |
| Scottish Enterprise | Glasgow |
| Scottish Fencing Ltd | Stirling |
| The Scottish Football Association (SFA) | Glasgow |
| The Scottish Football League | Glasgow |
| Scottish Friendly Assurance Society | Glasgow |
| Scottish Games Association | Halkirk |
| Scottish Gliding Association | Inverness |
| Scottish Golf Union Ltd | St Andrews |
| Scottish Gymnastics Association | Stirling |
| Scottish Handball Association | Largs |
| The Scottish Hockey Union Ltd | Edinburgh |
| Scottish Indoor Bowling Association (SIBA) | Mauchline |
| Scottish Karate Governing Body | Glasgow |
| Scottish Ladies' Golfing Association (SLGA) Ltd | Perth |
| Scottish Natural Heritage (SNH) | Inverness |
| Scottish Orienteering Association | Aviemore |
| Scottish Polo Association | Cupar |
| Scottish Rugby Union (SRU) | Edinburgh |
| Scottish Schools' Football Association (SSFA) | Glasgow |
| Scottish Screen | Glasgow |
| Scottish Sports Association (SSA) | Edinburgh |
| Scottish Squash | Edinburgh |
| Scottish Swimming Ltd | Stirling |
| Scottish Tug-of-War Association | Livingston |
| Scottish Volleyball Association | Edinburgh |
| Scottish Widows Plc | Edinburgh |
| Scottish Women's Football League | Glasgow |
| Scottish Women's Indoor Bowling Association (SWIBA) | Forfar |
| Scottish Women's Rugby Union | Edinburgh |
| ScottishPower | Glasgow |
| Seat UK | Milton Keynes |
| SEGRO (Slough Estates Group) | Slough |
| Seiko (UK) Ltd | Maidenhead |
| Sekonda, a Division of Time Products (UK) Ltd | Wigston |
| Sellafield Ltd | Warrington |
| Serious | London |
| SF Group | Nottingham |
| Sharp Electronics UK Ltd | Uxbridge |
| Sheffield Newspapers Ltd | Sheffield |
| Shell | London |
| Shepherd & Wedderburn | Edinburgh |
| Shepherd Group | York |
| Shepherd Neame Ltd | Faversham |
| Siemens plc | Camberley |
|
Sightsavers International | Haywards Heath |
|
Signature Sponsorship Ltd | Windsor |
| Silverlink Train Services Ltd | Birmingham |
| Simply Biz Plc | Huddersfield |
| Sine Qua Non International Ltd | Henley on Thames |
| Sirdar Spinning Ltd | Wakefield |
| Skandia UK Group | Southampton |
| The Ski-Bob Association of Great Britain (SAGB) | Hayling Island |
| The Ski Club of Great Britain | London |
| Skint Records | Brighton |
| Skipton Building Society | Skipton |
| Skoda UK | Milton Keynes |
| Sky Media | London |
| Sledge Ltd | London |
| Smart Group Recruitment Solutions | Bournemouth |
| Smith & Nephew plc | London |
| SML Marketing & Events | London |
| Snowsport England | Halesowen |
| Snowsport GB | Edinburgh |
| Snowsport Scotland (SNSC) | Edinburgh |
| Société Générale Corporate & Investment Banking | London |
| The Society of London Theatre | London |
| Somerfield Stores Ltd | Bristol |
| Sony Computer Entertainment | London |
| Sony Ericsson Mobile Communications | Farnborough |
| Sony United Kingdom Ltd | Weybridge |
| Sotheby's | London |
| Sound | London |
| South African Airways | London |
| South Caernarfon Creameries Ltd | Pwllheli |
| South Wales Argus | Newport |
| South West Communications Group Ltd | Exeter |
| South West Trains | London |
| South West Water Ltd | Exeter |
| South Yorkshire Funding Advice Bureau | Sheffield |
| Southern Water | Worthing |
| Sovereign Health Care | Bradford |
| Space | London |
| Space | Exeter |
| Spar UK Ltd | Harrow |
| Sparkworld Ltd | Newton Abbot |
| Spearing Waite Solicitors | Leicester |
| Specsavers Optical Group | London |
| Spectrum Strategy Consultants | London |
| Speedo International Ltd | Nottingham |
| Speedway Control Bureau | Rugby |
|
Spinal Research | Guildford |
| Spirit of Sport | Reading |
|
SponsorFinder | York |
| Sponsorship Activation Systems Ltd | London |
| Sponsorship Consulting Ltd | London |
| Sponsorship Intelligence | London |
| Sponsorship Media | London |
|
Sponsorship Science | Richmond |
| Sponsorshipnet Ltd | Carmarthen |
| Sponsorvision | London |
| Sport England | London |
| Sport England | London |
| Sport England (East Midland Region) | Nottingham |
| Sport England (Eastern Region) | Bedford |
| Sport England in the North West | Manchester |
| Sport England North East | Durham |
| Sport England (South East Region) | Reading |
| Sport England (South West Region) | Crewkerne |
| Sport England (West Midlands) | Birmingham |
| Sport England (Yorkshire) | Leeds |
| Sport + Markt AG | London |
| Sport Northern Ireland | Belfast |
| Sport Northern Ireland | Belfast |
| Sportcal.com | London |
| Sportech PLC (Littlewoods Gaming) | Liverpool |
| Sporting Horse & Pet Promotions | Calne |
| Sports Business International (SBI) | London |
| The Sports Business | Glasgow |
| The Sports Cafe | London |
| Sports Coach UK | Leeds |
| Sports Council for Wales (SCW) | Cardiff |
| Sports Council for Wales (SCW) | Cardiff |
|
Sports Impact | London |
|
Sports Marketing Surveys Ltd | Wisley |
| Sports Vision (International) | London |
| SportsAid | London |
| sportscotland | Edinburgh |
| sportscotland | Edinburgh |
| Sportslink UK Ltd | Bath |
| Spring Law | London |
| Squash Wales Ltd | Cardiff |
| SsangYong UK | Fleet |
| SSL International Plc | London |
| St George PLC | London |
| Stagecoach Group plc | Perth |
| Stan James Ltd | Wantage |
| Standard Chartered Bank | London |
| Standard Life Assurance Company | Edinburgh |
| Starbucks Coffee Company (UK) Ltd | London |
| Stena Line Ltd | Belfast |
| Stream | London |
| Subaru (UK) Ltd | Birmingham |
| Sun Microsystems Ltd | Camberley |
| Sunday Express | London |
| The Sunday Herald | Glasgow |
| Sunday Mirror | London |
| The Sunday People | London |
| The Sunday Telegraph | London |
| The Sunday Times | London |
| Sunsail | Portsmouth |
| Superior Creative Services Ltd | Melksham |
| Surrey County Cricket Club & The Brit Oval | London |
| Surridge | Burnley |
| Suzuki GB PLC | Milton Keynes |
| The Swatch Group (UK) Ltd | London |
| Swim Ulster | Belfast |
| Swim Wales | Swansea |
| Symmetry | Bristol |
| Synergy Sponsorship Ltd | London |
