| 1 | admiral group - mba leadership programs | £4.5B | 20,000 | -- |
| 2 | hcd a bureau veritas group company | £1.6B | 20,000 | 80 |
| 3 | help me quit - helpa fi i stopio | £845.7M | 20,000 | 80 |
| 4 | principality intermediaries | £668.8M | 3,000 | 60 |
| 5 | firstplus financial | £668.8M | 3,000 | 60 |
| 6 | cardiff council / cyngor caerdydd | £242.4M | 20,000 | 70 |
| 7 | transport for wales rail services / trafnidiaeth cymru gwasanaethau trên | £154.6M | 3,000 | 60 |
| 8 | motonovo finance | £126.0M | 750 | 70 |
| 9 | centurion vat specialists ltd
69203 - Tax consultancy | £102.9M | 3,000 | 60 |
| 10 | healthy weight healthy you | pwysau iach byw'n iach | £90.9M | 7,500 | 60 |
| 11 | greenisle wealth ltd
70221 - Financial management | £78.0M | 350 | 50 |
| 12 | corporate finance international | £78.0M | 350 | -- |
| 13 | glorious service .com | £40.8M | 750 | 70 |
| 14 | consort property management | £33.7M | 750 | 60 |
| 15 | neos hospitality
56302 - Public houses and bars | £31.7M | 750 | 60 |
| 16 | smartpro - permanent recruitment specialists | £29.6M | 750 | 60 |
| 17 | energy recovery investments limited
08990 - Other mining and quarrying n.e.c. | £28.7M | 5 | -- |
| 18 | world diversity group | £27.9M | 350 | 50 |
| 19 | interbridge mortgages
64205 - Activities of financial services holding c | £27.9M | 125 | 50 |
| 20 | ince & co. cardiff | £25.7M | 750 | 60 |
| 21 | g.j.binding & sons limited
52220 - Service activities incidental to water tra | £21.6M | 5 | -- |
| 22 | irg innovative repair group | £21.0M | 125 | 60 |
| 23 | volvo cars cardiff | £21.0M | 125 | 60 |
| 24 | postal packaging limited | £19.4M | -- | -- |
| 25 | ltg drinking products ltd | £19.4M | -- | -- |
| 26 | wyndham plastics & glass limited | £19.4M | -- | -- |
| 27 | capital upvc ltd | £19.4M | -- | -- |
| 28 | capital upvc & aluminium limited | £19.4M | -- | -- |
| 29 | principality (plastics & hardware) limited | £19.4M | -- | -- |
| 30 | menshen packaging uk ltd | £19.4M | -- | -- |
| 31 | jane norman ltd | £19.0M | 350 | 60 |
| 32 | arkco limited
69201 - Accounting and auditing activities | £18.3M | 44 | 60 |
| 33 | severn offshore services
50200 - Sea and coastal freight water transport | £17.7M | 30 | -- |
| 34 | severn offshore services ltd
50200 - Sea and coastal freight water transport | £17.7M | 5 | -- |
| 35 | dipec | £17.3M | -- | -- |
| 36 | portercall | £17.3M | -- | -- |
| 37 | prs plastic recovery solutions | £17.3M | -- | -- |
| 38 | knight manufacturing group | £17.3M | -- | -- |
| 39 | insulwatt | £17.3M | -- | -- |
| 40 | rentalspec ltd | £15.8M | -- | -- |
| 41 | alpha electrical repairs limited | £15.8M | -- | -- |
| 42 | raydav ltd | £15.8M | -- | -- |
| 43 | aviationmart limited | £15.8M | -- | -- |
| 44 | industrial automation technology limited | £15.8M | -- | -- |
| 45 | m.d.b. heating & plumbing limited | £15.8M | -- | -- |
| 46 | infinity-avi limited | £15.8M | -- | -- |
| 47 | mod-fix limited | £15.8M | -- | -- |
| 48 | total filtration limited | £15.8M | -- | -- |
| 49 | ba lifts limited | £15.8M | -- | -- |
| 50 | a1 electrical engineering limited | £15.8M | -- | -- |
| 51 | picofluidics limited | £15.8M | -- | -- |
| 52 | jiangsu dazhong electric motor corporation limited | £15.8M | -- | -- |
| 53 | rack international (gb) ltd | £15.8M | -- | -- |
| 54 | century design limited | £15.8M | -- | -- |
| 55 | celtic compressors & pneumatics ltd | £15.8M | -- | -- |
| 56 | bute property services limited | £15.8M | -- | -- |
| 57 | unimec limited | £15.8M | -- | -- |
| 58 | drp associates ltd | £15.8M | -- | -- |
| 59 | hbw engineering ltd. | £15.8M | -- | -- |
| 60 | john pryke & partners ltd. | £15.8M | -- | -- |
| 61 | s & r steel fixing limited | £15.8M | -- | -- |
| 62 | redmount international ltd | £15.8M | -- | -- |
| 63 | britalia door products ltd | £15.8M | -- | -- |
| 64 | electro main limited | £15.8M | -- | -- |
| 65 | edras limited | £15.8M | -- | -- |
| 66 | remtech remediation & ground engineering limited | £15.8M | -- | -- |
| 67 | allied mechanical engineering ltd | £15.8M | -- | -- |
| 68 | dgvconsultancy ltd. | £15.8M | -- | -- |
| 69 | sk engineering and consulting ltd | £15.8M | -- | -- |
| 70 | mick san engineering consultancy limited | £15.8M | -- | -- |
| 71 | numerical engineering ltd | £15.8M | -- | -- |
| 72 | tema group ltd | £15.8M | -- | -- |
| 73 | cooltechnic limited | £15.8M | -- | -- |
| 74 | utellus limited | £15.8M | -- | -- |
| 75 | hma aerostructures ltd | £15.8M | -- | -- |
| 76 | atencion limited | £15.8M | -- | -- |
| 77 | t.p.t. construction limited | £15.8M | -- | -- |
| 78 | civil design & engineering ltd | £15.8M | -- | -- |
| 79 | ctm europe ltd | £15.8M | -- | -- |
| 80 | forefront automation ltd. | £15.8M | -- | -- |
| 81 | eden lotus power ltd | £15.8M | -- | -- |
| 82 | s s concept solutions limited | £15.8M | -- | -- |
| 83 | hiretek limited | £15.8M | -- | -- |
| 84 | new way engineers limited | £15.8M | -- | -- |
| 85 | cool solution refrigeration limited | £15.8M | -- | -- |
| 86 | caffair ltd | £15.8M | -- | -- |
| 87 | jtm ltd | £15.8M | -- | -- |
| 88 | artw limited | £15.8M | -- | -- |
| 89 | simons site service ltd | £15.8M | -- | -- |
| 90 | early enterprises limited | £15.8M | -- | -- |
| 91 | cardiff hydraulics ltd | £15.8M | -- | -- |
| 92 | master techs limited | £15.8M | -- | -- |
| 93 | compound security ltd | £15.8M | -- | -- |
| 94 | wawatec system limited | £15.8M | -- | -- |
| 95 | djf services lifts and escalators ltd | £15.8M | -- | -- |
| 96 | colin's recruitment limited | £15.8M | -- | -- |
| 97 | guardian angel carers cardiff | £14.8M | 350 | 60 |
| 98 | spire cardiff hospital | £14.8M | 350 | 50 |
| 99 | health economics and outcomes research ltd
70229 - Management consultancy activities other th | £14.3M | 125 | -- |
| 100 | cardiff. | £14.1M | -- | -- |