| 🥇 | MONEYSUPERMARKET.COM LTD | 98Excellent | #199 | ↑ 2.9 | Software |
| 🥈 | LONETREE LIMITED | 97Excellent | #316 | — | Lifestyle And Entertainment |
| 🥉 | MODUS SERVICES LIMITED | 96Excellent | #400 | ↑ 12.9 | — |
| #4 | SOUTH HOOK LNG TERMINAL COMPANY LTD. | 95Excellent | #449 | ↓ 0.2 | Property |
| #5 | QUIDCO LIMITED | 95Excellent | #510 | New | Professional Services |
| #6 | THE WELSH RUGBY UNION LIMITED | 93Excellent | #665 | ↑ 2.7 | Lifestyle And Entertainment |
| #7 | DRAGON LNG LIMITED | 92Excellent | #715 | ↑ 4.0 | Property |
| #8 | VAUXHALL FINANCE PLC | 92Excellent | #717 | ↑ 3.0 | — |
| #9 | FIRST HYDRO COMPANY | 92Excellent | #752 | ↑ 2.6 | Property |
| #10 | NEWSQUEST MEDIA GROUP LIMITED | 92Excellent | #765 | ↑ 0.9 | Creative |
| #11 | WJEC CBAC LIMITED | 91Excellent | #778 | ↑ 2.6 | Professional Services |
| #12 | LEXISNEXIS RISK SOLUTIONS UK LIMITED | 91Excellent | #802 | ↑ 4.2 | Information Technology |
| #13 | SHAW HEALTHCARE (GROUP) LIMITED | 91Excellent | #848 | ↑ 0.1 | Healthcare And Wellbeing |
| #14 | JULIAN HODGE BANK LIMITED | 90Excellent | #897 | ↑ 6.3 | — |
| #15 | DWR CYMRU CYFYNGEDIG | 89Good | #994 | ↑ 1.2 | Environment |
| #16 | NEWSQUEST COMMUNITY MEDIA LIMITED | 89Good | #1009 | ↑ 11.2 | Creative |
| #17 | TRANSPORT FOR WALES RAIL LTD | 88Good | #1061 | ↑ 8.1 | Travel And Transportation |
| #18 | REDROW HOMES LIMITED | 88Good | #1090 | ↓ 0.2 | Property |
| #19 | BLUESTONE RESORTS LIMITED | 84Good | #1498 | ↓ 0.8 | Lifestyle And Entertainment |
| #20 | PHARMARON UK LIMITED | 83Good | #1550 | ↓ 2.7 | — |
| #21 | WALES MILLENNIUM CENTRE | 83Good | #1565 | ↓ 3.2 | — |
| #22 | MOTONOVO FINANCE LIMITED | 81Good | #1744 | ↑ 15.0 | Financial Services |
| #23 | BAILEY FAMILY INVESTMENTS PLC | 81Good | #1794 | ↑ 0.9 | Travel And Transportation |
| #24 | TRANSPORT FOR WALES | 80Good | #1878 | ↓ 4.3 | Travel And Transportation |
| #25 | HALLIWELL JONES (NORTH WALES) LIMITED | 80Good | #1910 | ↓ 1.1 | Travel And Transportation |
| #26 | SPTS TECHNOLOGIES LIMITED | 79Good | #1991 | ↑ 1.1 | Supply Chain |
| #27 | ARAG SERVICES LIMITED | 79Good | #1996 | ↑ 2.1 | Environment |
| #28 | CAR HIRE (DAY OF SWANSEA) LIMITED | 78Good | #2006 | ↑ 3.8 | Supply Chain |
| #29 | ACORN RECRUITMENT LIMITED | 78Good | #2013 | ↓ 3.3 | Professional Services |
| #30 | EUI LIMITED | 77Good | #2116 | — | Financial Services |
| #31 | OSBORNE PROPERTY SERVICES LIMITED | 77Good | #2065 | ↓ 11.1 | — |
| #32 | JONES BROS. RUTHIN (CIVIL ENGINEERING) CO. LIMITED | 76Good | #2182 | ↑ 5.1 | Property |
| #33 | ADMIRAL FINANCIAL SERVICES LIMITED | 75Good | #2273 | ↓ 1.0 | Financial Services |
| #34 | NEWLAW LEGAL LIMITED | 75Fair | #2323 | ↓ 2.4 | Professional Services |
| #35 | IPSEN BIOPHARM LIMITED | 74Fair | #2364 | ↑ 1.1 | — |
| #36 | KRONOSPAN LIMITED | 74Fair | #2375 | ↓ 3.7 | — |
| #37 | C.E.M. DAY LIMITED | 74Fair | #2382 | ↓ 0.4 | Travel And Transportation |
| #38 | JONES BROS RUTHIN CO LIMITED | 71Fair | #2718 | – 0.0 | — |
| #39 | CASTELL HOWELL FOODS LIMITED | 70Fair | #2730 | New | Lifestyle And Entertainment |
| #40 | SMS ENERGY SERVICES LIMITED | 70Fair | #2747 | — | Professional Services |
| #41 | ALUN GRIFFITHS (CONTRACTORS) LIMITED | 70Fair | #2770 | — | Property |
| #42 | ROCKWOOL LIMITED | 70Fair | #2771 | ↑ 2.8 | Supply Chain |
| #43 | RALAWISE LIMITED | 70Fair | #2790 | ↓ 11.9 | Creative |
| #44 | ANWYL CONSTRUCTION COMPANY LIMITED | 68Fair | #2939 | ↓ 7.6 | Property |
| #45 | MON MOTORS LIMITED | 68Fair | #2919 | — | Travel And Transportation |
| #46 | NORGINE LIMITED | 67Fair | #2991 | ↓ 6.9 | — |
| #47 | AMCARE LIMITED | 66Fair | #3036 | ↓ 17.6 | — |
| #48 | HYDRO ALUMINIUM DEESIDE LIMITED | 66Fair | #3085 | ↑ 1.7 | — |
| #49 | HUWS GRAY LIMITED | 66Fair | #3101 | ↓ 4.9 | Property |
| #50 | WALES & WEST UTILITIES LIMITED | 65Fair | #3133 | ↑ 3.5 | — |
| #51 | THE TRADE CENTRE GROUP PLC | 64Fair | #3193 | ↓ 1.2 | Travel And Transportation |
| #52 | FEDERALMOGUL AFTERMARKET UK LIMITED | 63Fair | #3575 | ↑ 1.8 | Travel And Transportation |
| #53 | SYNTHITE LIMITED | 63Fair | #3317 | — | Supply Chain |
| #54 | KINGSPAN LIMITED | 63Fair | #3319 | ↑ 1.4 | Supply Chain |
| #55 | BOOTS HEARINGCARE LIMITED | 62Fair | #3333 | ↑ 8.0 | — |
| #56 | PERSONNEL HYGIENE SERVICES LIMITED | 59Fair | #3875 | ↓ 0.8 | — |
| #57 | TARGET GROUP LIMITED | 59Fair | #3905 | ↓ 8.7 | — |
| #58 | LBS BUILDERS MERCHANTS LIMITED | 58Fair | #3679 | ↑ 2.1 | Property |
| #59 | CONVATEC LIMITED | 56Fair | #3797 | ↓ 11.4 | — |
| #60 | ICELAND FOODS LIMITED | 55Fair | #3867 | ↓ 0.3 | Supply Chain |
| #61 | FEI FOODS LIMITED | 55Fair | #3881 | ↑ 10.2 | — |
| #62 | CH4 GAS UTILITY AND MAINTENANCE SERVICES LIMITED | 55Fair | #3904 | New | — |
| #63 | ORTHO-CLINICAL DIAGNOSTICS | 55Fair | #3923 | ↑ 1.3 | — |
| #64 | WATKIN JONES & SON LIMITED | 54Fair | #3957 | – 0.0 | — |
| #65 | FIRST CYMRU BUSES LIMITED | 53Fair | #3990 | ↑ 4.9 | Travel And Transportation |
| #66 | ATLAS COPCO IAS UK LIMITED | 52Fair | #4082 | ↑ 5.6 | — |
| #67 | SINCLAIR GARAGES LIMITED | 52Fair | #4097 | ↓ 10.3 | Travel And Transportation |
| #68 | BIOMET UK LIMITED | 51Fair | #4151 | ↓ 2.2 | Life Sciences And Medical Technology |
| #69 | WYNNSTAY (AGRICULTURAL SUPPLIES) LIMITED | 51Fair | #4160 | ↑ 4.7 | — |
| #70 | SINCLAIR MOTOR HOLDINGS LIMITED | 50Poor | #4241 | ↓ 10.3 | Supply Chain |
| #71 | CORNING LIMITED | 50Poor | #4256 | — | — |
| #72 | SINCLAIR GARAGES (NEWPORT) LTD. | 49Poor | #4275 | ↓ 1.5 | Travel And Transportation |
| #73 | QIOPTIQ LIMITED | 49Poor | #4283 | ↓ 3.8 | Information Technology |
| #74 | PREMIER FOREST PRODUCTS LIMITED | 47Poor | #4411 | New | Supply Chain |
| #75 | SOFIDEL UK LIMITED | 46Poor | #4449 | — | — |
| #76 | A. SCHULMAN INC. LIMITED | 45Poor | #4493 | ↑ 3.0 | — |
| #77 | ORANGEBOX LIMITED | 44Poor | #4933 | ↑ 4.9 | Property |
| #78 | MERITOR AFTERMARKET EUROPE LIMITED | 43Poor | #4624 | ↑ 0.5 | Travel And Transportation |
| #79 | GS YUASA BATTERY MANUFACTURING UK LIMITED | 42Poor | #4671 | ↓ 1.2 | — |
| #80 | GE AIRCRAFT ENGINE SERVICES LIMITED | 41Poor | #4703 | ↓ 11.1 | — |
| #81 | BOYS & BODEN, LIMITED | 41Poor | #4716 | — | Supply Chain |
| #82 | ARDAGH METAL PACKAGING UK LIMITED | 39Poor | #4793 | ↑ 1.9 | Supply Chain |
| #83 | EUROCAPS LIMITED | 38Poor | #5200 | ↓ 1.7 | — |
| #84 | IRVINGQ LIMITED | 38Poor | #4828 | ↓ 2.0 | — |
| #85 | FLETCHERS BAKERIES LIMITED | 38Poor | #4836 | ↓ 0.8 | Lifestyle And Entertainment |
| #86 | SEDA UK LIMITED | 35Poor | #4915 | — | Supply Chain |
| #87 | MERITOR HEAVY VEHICLE BRAKING SYSTEMS (UK) LIMITED | 34Poor | #4945 | — | Travel And Transportation |
| #88 | DOW SILICONES UK LIMITED | 34Poor | #5052 | – 0.0 | — |
| #89 | NICE-PAK INTERNATIONAL LIMITED | 33Poor | #4982 | ↓ 8.9 | — |
| #90 | F-M MOTORPARTS LIMITED | 33Poor | #4997 | — | Travel And Transportation |
| #91 | MEMORY LANE CAKES LIMITED | 31Poor | #5035 | ↑ 2.1 | Lifestyle And Entertainment |
| #92 | ENERSYS LTD. | 31Poor | #5045 | ↓ 0.8 | — |
| #93 | SAFRAN SEATS GB LIMITED | 30Poor | #5075 | ↑ 2.7 | Travel And Transportation |
| #94 | CHARLIES STORES LIMITED | 28Poor | #5105 | ↑ 1.7 | Creative |
| #95 | ADMIRAL LAW LIMITED | 22Very Poor | #5194 | — | Professional Services |
| #96 | FEDERALMOGUL FRICTION PRODUCTS LIMITED | 18Very Poor | #5636 | ↑ 5.1 | Travel And Transportation |
