| 🥇 | TWENTIETH CENTURY FOX TELEVISION DISTRIBUTION (U.K.), LTD. | 100Excellent | Digital Entertainment | North West | Get Certified |
| 🥈 | SONIC HEALTHCARE HOLDING COMPANY | 100Excellent | — | London | Get Certified |
| 🥉 | RULLION IT PLUS LIMITED | 100Excellent | Human Resources | North West | Get Certified |
| #4 | WEBER SHANDWICK INTERNATIONAL LTD | 100Excellent | Professional Services | South East | Get Certified |
| #5 | AMS ADVANCED MARKETING SERVICES INVESTMENTS LIMITED | 100Excellent | Professional Services | London | Get Certified |
| #6 | TANGENT TRADING LIMITED | 100Excellent | Raw Materials And Intermediate Goods | London | Get Certified |
| #7 | BARINGS (U.K.) LIMITED | 100Excellent | Software | London | Get Certified |
| #8 | AON INVESTMENTS LIMITED | 100Excellent | Professional Services | London | Get Certified |
| #9 | PIZZAEXPRESS MERCHANDISING LIMITED | 100Excellent | Lifestyle And Entertainment | South East | Get Certified |
| #10 | SHELL GAS MARKETING U.K LIMITED | 100Excellent | Distribution And Delivery | London | Get Certified |
| #11 | LORENA INVESTMENTS LIMITED | 100Excellent | Healthcare And Wellbeing | Scotland | Get Certified |
| #12 | VIRGO HEALTH PR LIMITED | 100Excellent | Professional Services | South East | Get Certified |
| #13 | LBG EQUITY INVESTMENTS LIMITED | 100Excellent | — | London | Get Certified |
| #14 | THE FIRST FEDERATION TRUST | 100Excellent | Education | South West | Get Certified |
| #15 | BARINGS GLOBAL ADVISERS LIMITED | 100Excellent | — | London | Get Certified |
| #16 | PROMENS PACKAGING LIMITED | 100Excellent | Manufacturing | East Midlands | Get Certified |
| #17 | RSA ACCIDENT REPAIRS LIMITED | 100Excellent | Road Travel | South East | Get Certified |
| #18 | KPMG UK LIMITED | 100Excellent | Human Resources | Unknown | Get Certified |
| #19 | CENTRICA LNG UK LIMITED | 100Excellent | Energy | South East | Get Certified |
| #20 | ARCH SYNDICATE INVESTMENTS LTD | 100Excellent | Financial Services | London | Get Certified |
| #21 | GARDINER & THEOBALD FAIRWAY LIMITED | 100Excellent | Infrastructure And Construction | London | Get Certified |
| #22 | FIDELIS UNDERWRITING LIMITED | 100Excellent | Financial Services | London | Get Certified |
| #23 | SANTANDER CONSUMER (UK) PLC | 100Excellent | Financial Services | South East | Get Certified |
| #24 | MOTT MACDONALD BENTLEY LTD | 100Excellent | Environment | Yorkshire and The Humber | Get Certified |
| #25 | BP ENERGY EUROPE LIMITED | 100Excellent | — | Scotland | Get Certified |
| #26 | RULLION ENGINEERING LIMITED | 100Excellent | Human Resources | North West | Get Certified |
| #27 | BNK (UK) LIMITED | 100Excellent | — | London | Get Certified |
| #28 | HELLO ELEPHANT LTD | 100Excellent | Marketing And Sales | London | Get Certified |
| #29 | GAP (UK HOLDINGS) LIMITED | 100Excellent | — | London | Get Certified |
| #30 | SILCHESTER PARTNERS LIMITED | 100Excellent | Financial Services | London | Get Certified |
| #31 | SPIRAX-SARCO OVERSEAS LIMITED | 100Excellent | Professional Services | South West | Get Certified |
| #32 | REILLY JDM HOLDINGS LIMITED | 100Excellent | Financial Services | South East | Get Certified |
| #33 | THREADNEEDLE INTERNATIONAL LIMITED | 100Excellent | Financial Services | London | Get Certified |
| #34 | CADENCE INNOVA LTD | 100Excellent | Professional Services | South East | Get Certified |
| #35 | PREMIER OIL E&P UK ENERGY TRADING LIMITED | 100Excellent | Energy | West Midlands | Get Certified |
| #36 | SANDERSON ASSET MANAGEMENT LLP | 100Excellent | Financial Services | West Midlands | Get Certified |
| #37 | INNER DOWSING WIND FARM LIMITED | 100Excellent | Energy | Scotland | Get Certified |
| #38 | AKO CAPITAL LLP | 100Excellent | Financial Services | London | Get Certified |
| #39 | CNR INTERNATIONAL (U.K.) DEVELOPMENTS LIMITED | 100Excellent | Energy | Yorkshire and The Humber | Get Certified |
| #40 | AMALGAMET LIMITED | 100Excellent | Raw Materials And Intermediate Goods | London | Get Certified |
| #41 | AKO FOUNDATION | 100Excellent | Healthcare And Wellbeing | London | Get Certified |
| #42 | LIVERPOOL VICTORIA INSURANCE COMPANY LIMITED | 100Excellent | Financial Services | South East | Get Certified |
| #43 | OPET INTERNATIONAL LIMITED | 100Excellent | — | London | Get Certified |
| #44 | TAQA BRATANI LNS LIMITED | 100Excellent | Energy | London | Get Certified |
| #45 | VITOL BROKING LIMITED | 100Excellent | Energy | London | Get Certified |
| #46 | 3I GROUP PLC | 100Excellent | Financial Services | London | Get Certified |
| #47 | ISLAND RESEARCH LLP | 100Excellent | — | London | Get Certified |
| #48 | ROYAL LONDON MANAGEMENT SERVICES LIMITED | 100Excellent | Financial Services | London | Get Certified |
| #49 | LUXFER HOLDINGS PLC | 100Excellent | Manufacturing | North West | Get Certified |
| #50 | PRINCIPAL FINANCIAL SERVICES V (UK) LTD | 100Excellent | Financial Services | London | Get Certified |
| #51 | EXPERIAN TECHNOLOGY LIMITED | 100Excellent | Software | East Midlands | Get Certified |
| #52 | SIMPLYHEALTH ACCESS | 100Excellent | Healthcare And Wellbeing | South East | Get Certified |
| #53 | LYNN WIND FARM LIMITED | 100Excellent | Energy | Yorkshire and The Humber | Get Certified |
| #54 | ANGEL TRAINS GROUP LIMITED | 100Excellent | Professional Services | London | Get Certified |
| #55 | PEAC BUSINESS FINANCE LIMITED | 100Excellent | Financial Services | South East | Get Certified |
| #56 | CASTROL LIMITED | 100Excellent | Energy | South East | Get Certified |
| #57 | PAYQUEST GROUP LIMITED | 100Excellent | Human Resources | North West | Get Certified |
| #58 | TRANSRE LONDON LIMITED | 100Excellent | Financial Services | London | Get Certified |
| #59 | IPG EUROPE LTD | 100Excellent | Professional Services | London | Get Certified |
| #60 | DYNO-ROD LIMITED | 100Excellent | Property | South East | Get Certified |
| #61 | SILCHESTER CONTINUATION LIMITED | 100Excellent | Software | London | Get Certified |
| #62 | PAYSTREAM MY MAX 3 LIMITED | 100Excellent | Human Resources | North West | Get Certified |
| #63 | UBS ASSET MANAGEMENT (UK) LTD | 100Excellent | Financial Services | London | Get Certified |
| #64 | LAND SECURITIES CAPITAL MARKETS PLC | 100Excellent | Financial Services | London | Get Certified |
| #65 | HILTON WORLDWIDE MANAGE LIMITED | 100Excellent | Travel And Transportation | East of England | Get Certified |
| #66 | HIGHWAY INSURANCE COMPANY LIMITED | 100Excellent | Financial Services | South East | Get Certified |
| #67 | INNOTECH ADVISERS LIMITED | 100Excellent | Financial Services | South East | Get Certified |
| #68 | FLEETCOR EUROPE LIMITED | 100Excellent | Energy | London | Get Certified |
| #69 | CHASEDESIGN WORLDWIDE LIMITED | 100Excellent | Marketing And Sales | London | Get Certified |
| #70 | KNIGHT FRANK SERVICES COMPANY | 100Excellent | Professional Services | London | Get Certified |
| #71 | SAINSBURY PROPCO A LIMITED | 100Excellent | Property | London | Get Certified |
| #72 | FOCUSED CONSULTING LIMITED | 100Excellent | Human Resources | North West | Get Certified |
| #73 | SOUTH EASTERN POWER NETWORKS PLC | 100Excellent | Energy | London | Get Certified |
| #74 | ROCKROSE UKCS 9 LIMITED | 100Excellent | Professional Services | London | Get Certified |
| #75 | M&G REAL ESTATE LIMITED | 100Excellent | Financial Services | London | Get Certified |
| #76 | EASTERN POWER NETWORKS PLC | 100Excellent | Energy | London | Get Certified |
| #77 | COVEA INSURANCE PLC | 100Excellent | Financial Services | Yorkshire and The Humber | Get Certified |
| #78 | DENPLAN LIMITED | 100Excellent | Primary Care | South East | Get Certified |
| #79 | SILCHESTER INTERNATIONAL INVESTORS LLP | 100Excellent | Financial Services | London | Get Certified |
| #80 | JELF LIMITED | 100Excellent | Financial Services | London | Get Certified |
| #81 | INTERBAY ML, LTD | 100Excellent | Financial Services | South East | Get Certified |
| #82 | EQUION ENERGIA LIMITED | 100Excellent | Energy | London | Get Certified |
| #83 | XEROX FINANCE LIMITED | 100Excellent | Professional Services | South East | Get Certified |
| #84 | EVERSHEDS SUTHERLAND LEGAL SERVICES LIMITED | 100Excellent | Professional Services | Unknown | Get Certified |
| #85 | ID MEDICAL GROUP LIMITED | 100Excellent | Human Resources | South East | Get Certified |
| #86 | VA&E TRADING LLP | 100Excellent | — | London | Get Certified |
| #87 | TOYOTA FINANCIAL SERVICES (UK) PLC | 100Excellent | Financial Services | South East | Get Certified |
| #88 | SMARTESTENERGY LIMITED | 100Excellent | Energy | London | Get Certified |
| #89 | CLICK TRAVEL LTD | 100Excellent | Software | West Midlands | Get Certified |
| #90 | ELECTRA PRIVATE EQUITY PLC | 100Excellent | Financial Services | North West | Get Certified |
| #91 | HYUNDAI CAPITAL UK LIMITED | 100Excellent | Financial Services | South East | Get Certified |
| #92 | EPYX LIMITED | 100Excellent | Road Travel | West Midlands | Get Certified |
| #93 | RANDSTAD CPE LIMITED | 100Excellent | Human Resources | East of England | Get Certified |
| #94 | DANNY SULLIVAN & SONS LTD. | 100Excellent | Property | London | Get Certified |
| #95 | EAU ROUGE PROPERTIES, LTD. | 100Excellent | Property | London | Get Certified |
| #96 | OCTAGON ATHLETE REPRESENTATION LIMITED | 100Excellent | Sports | London | Get Certified |
| #97 | NASA UMBRELLA LTD | 100Excellent | Financial Services | South West | Get Certified |
| #98 | AECOM INFRASTRUCTURE & ENVIRONMENT UK LIMITED | 100Excellent | Professional Services | Unknown | Get Certified |
| #99 | US REAL ESTATE HOLDINGS NO.2 LIMITED | 100Excellent | — | London | Get Certified |
| #100 | IPG DXTRA GROUP HOLDINGS LIMITED | 100Excellent | Professional Services | London | Get Certified |
