| 1 | Whitecross Dental Care LIMITED | Unitedkingdom | Smithills | Europa House | Manchester, Greater Manchester | M26 1GG | idhgroup.***** | 1929 | $478,250,520 | 2,474 | N/A | N/A | N/A |
| 2 | Portman Healthcare LIMITED | Unitedkingdom | Wolverhampton | 82 Tettenhall Road | Wolverhampton, West Midlands | WV1 4TF | parkdaledentalandimplantclinic.***** | 1991 | $369,024,204 | 2,798 | N/A | N/A | N/A |
| 3 | Xeon Smiles UK LIMITED | Unitedkingdom | Hotwells | Boyces Building | City of Bristol | BS8 4HU | bupa.***** | 1950 | $133,418,460 | 945 | N/A | N/A | N/A |
| 4 | Royal Jubilee Maternity Hospital | Unitedkingdom | Glenariffe | Royal Victoria Hospital | Belfast | BT12 6BA | belfasttrust.***** | 1798 | $125,230,578 | 6,000 | N/A | N/A | N/A |
| 5 | Rodericks Dental Partners LIMITED | Unitedkingdom | Grange Park | Unit 15 | Northamptonshire | NN4 5EZ | rodericksdental.***** | 1923 | $116,768,365 | 1,144 | N/A | N/A | N/A |
| 6 | Oasis Dental Care LIMITED | Unitedkingdom | Pye Corner | Oasis Dental Care Ltd | South Gloucestershire | BS16 1GW | 3sl-dental.***** | 1950 | $99,708,260 | 776 | N/A | N/A | N/A |
| 7 | Dentex Assets LIMITED | Unitedkingdom | Mortlake | 45 North Worple Way | London | SW14 8PZ | thepracticeatmortlake.***** | 2017 | $92,364,404 | 5 | N/A | N/A | N/A |
| 8 | Oasis Dental Care (central) LIMITED | Unitedkingdom | Bristol | Vantage Park | City of Bristol | BS16 1GW | bupadentalcare.***** | 1999 | $84,231,130 | 706 | N/A | N/A | N/A |
| 9 | Riverdale Topco LIMITED | Unitedkingdom | Seamer | 13 Roseberry Court | North Yorkshire | TS9 5QT | N/A | 2018 | $77,078,668 | 720 | N/A | N/A | N/A |
| 10 | Riverdale Tradeco LIMITED | Unitedkingdom | Seamer | Unit 13 | North Yorkshire | TS9 5QT | N/A | 2018 | $77,078,668 | 720 | N/A | N/A | N/A |
| 11 | Clyde Dental Practice LIMITED | Unitedkingdom | Drumchapel | 33 Port Dundas Road | Glasgow City | G4 0HF | clydemunrodental.***** | 2001 | $72,804,465 | 619 | N/A | N/A | N/A |
| 12 | Gensmile Dental Care LIMITED | Unitedkingdom | Pewsey | Easton Manor | Wiltshire | SN9 5LZ | gensmile.***** | 2015 | $60,084,474 | 436 | N/A | N/A | N/A |
| 13 | Petrie Tucker And Partners LIMITED | Unitedkingdom | Smithills | Europa House | Manchester, Greater Manchester | M26 1GG | a-listdentistry.***** | 1954 | $58,367,684 | 2,941 | N/A | N/A | N/A |
| 14 | Damira Dental Studios LIMITED | Unitedkingdom | Pinner | The High Barn | London | HA5 3YQ | damiradental.***** | 2010 | $54,060,472 | 365 | N/A | N/A | N/A |
| 15 | Damira Group Holdings LIMITED | Unitedkingdom | Bicester | Unit 2 | Oxfordshire | OX26 6QB | N/A | 2020 | $54,060,472 | 365 | N/A | N/A | N/A |
| 16 | Clacton Dental Care LTD | Unitedkingdom | Wyatts Green | 137 High Street | Essex | CM14 4RZ | together.***** | 2011 | $51,678,200 | 413 | N/A | N/A | N/A |
| 17 | Bupa Dental Services LIMITED | Unitedkingdom | Pye Corner | Vantage Office Park | South Gloucestershire | BS16 1GW | bupadentalcare.***** | 1950 | $44,429,719 | 551 | N/A | N/A | N/A |
| 18 | Oasis Dental Care (southern) LIMITED | Unitedkingdom | Pye Corner | Vantage Office Park | South Gloucestershire | BS16 1GW | bupadentalcare.***** | 1954 | $43,590,513 | 492 | N/A | N/A | N/A |
| 19 | The Real Good Dental Company LIMITED | Unitedkingdom | New Town | 25 Queen Street | City of Edinburgh | EH2 1JX | realgooddental.***** | 2015 | $43,116,407 | 534 | N/A | N/A | N/A |
| 20 | Idh LIMITED | Unitedkingdom | Shirley | 20 Anglesea Road | Southampton | SO15 5QJ | mydentist.***** | 1929 | $42,305,815 | 859 | N/A | N/A | N/A |
| 21 | Community Dental Services Cic | Unitedkingdom | Bedford | Carlisle Road | Bedford Borough | MK44 1LZ | communitydentalservices.***** | 2010 | $40,979,594 | 449 | N/A | N/A | N/A |
| 22 | Dental Partners Trading LIMITED | Unitedkingdom | Grange Park | Unit 15 | Northamptonshire | NN4 5EZ | N/A | 2017 | $35,257,173 | 607 | N/A | N/A | N/A |
| 23 | Smart Dental Care LIMITED | Unitedkingdom | Benchill | Unit 5 | Manchester, Greater Manchester | M22 5LB | smartdentalcare.***** | 2008 | $27,797,842 | 262 | N/A | N/A | N/A |
| 24 | Redbridge Associates LIMITED | Unitedkingdom | Benchill | Unit 5 | Manchester, Greater Manchester | M22 5LB | smartdentalcare.***** | 2006 | $27,797,842 | 255 | N/A | N/A | N/A |
| 25 | Integrated Laboratory Solutions Llp | Unitedkingdom | Steeton | Airedale General Hospital | Bradford, West Yorkshire | BD20 6TD | N/A | 2016 | $27,015,174 | 3 | N/A | N/A | N/A |
| 26 | Dentaprime UK PLC | Unitedkingdom | North Woolwich | Block D | London | E15 2GD | dentaprime.***** | 2013 | $26,792,190 | 132 | N/A | N/A | N/A |
| 27 | American Orthodontics (UK) LIMITED | Unitedkingdom | Castor | Unit 7 the Barns | Peterborough | PE5 7DH | americanortho.***** | 1989 | $25,363,723 | 45 | N/A | N/A | N/A |
| 28 | Sdc Group LIMITED | Unitedkingdom | Glasgow | 0/1 | Glasgow City | G2 4BG | scottishdentalcare.***** | 2014 | $25,049,948 | 171 | N/A | N/A | N/A |
| 29 | Perfect Smile Group Holding LIMITED | Unitedkingdom | Richmond | Perfect Smile Dental Surgery | London | TW9 2NQ | perfectsmile-dental.***** | 2014 | $24,897,199 | 201 | N/A | N/A | N/A |
| 30 | Enovis Surgical Gb LIMITED | Unitedkingdom | Letchworth | Unit 1 | Hertfordshire | SG6 2JF | limacorporate.***** | 2009 | $24,490,765 | 49 | N/A | N/A | N/A |
| 31 | Alliance Dental Care LIMITED | Unitedkingdom | Stevenage | 2nd Floor, Unit 9, Gateway 1000 | Hertfordshire | SG1 2FP | N/A | 2011 | $23,939,052 | 157 | N/A | N/A | N/A |
| 32 | South Cliff LIMITED | Unitedkingdom | Crawley | The Galleria | West Sussex | RH10 1WW | N/A | 2012 | $22,683,983 | 271 | N/A | N/A | N/A |
| 33 | Swift Dental Laboratory LIMITED | Unitedkingdom | Smithills | Lakeside House | Manchester, Greater Manchester | BL3 2QJ | swiftdental.***** | 1984 | $21,721,700 | 287 | N/A | N/A | N/A |
| 34 | Evo Dental Centre LIMITED | Unitedkingdom | Cronton | Paramount Business Park | Knowsley, Merseyside | L36 6AW | evodental.***** | 2007 | $21,442,403 | 95 | N/A | N/A | N/A |
| 35 | Apex Dental Care LIMITED | Unitedkingdom | Eastleigh | High Bridge House | Hampshire | SO19 9AF | bupa.***** | 2006 | $21,441,867 | 175 | N/A | N/A | N/A |
| 36 | Dentistry For You | Unitedkingdom | Crayford Ness | Shalimar | London | DA14 6AX | dentistryforyou.***** | 2006 | $19,180,014 | 15 | N/A | N/A | N/A |
| 37 | Dumbledore Dental Care LIMITED | Unitedkingdom | Crawley | The Galleria | West Sussex | RH10 1WW | nhs.***** | 2015 | $19,050,453 | 200 | N/A | N/A | N/A |
| 38 | Scott Arms Associates LIMITED | Unitedkingdom | Perry Barr | 914-916 Walsall Road | Birmingham, West Midlands | B42 1TG | scottarmsdentalpractice.***** | 2010 | $18,536,166 | 114 | N/A | N/A | N/A |
| 39 | Sdc Clinics LIMITED | Unitedkingdom | Glasgow | 0/1 | Glasgow City | G2 4BG | scottishdentalcare.***** | 2021 | $18,008,584 | 162 | N/A | N/A | N/A |
| 40 | Colosseum Dental UK Partnerships LIMITED | Unitedkingdom | Herne Hill | 409 Norwood Road | London | SE27 9BU | uniquedentalcare.***** | 2010 | $16,167,508 | 160 | N/A | N/A | N/A |
| 41 | Alanic Engineering LIMITED | Unitedkingdom | Redhill | 3 Three Arch Business Park | Surrey | RH1 5SS | cts-dental.***** | 1976 | $16,072,837 | 129 | N/A | N/A | N/A |
| 42 | Tooth Club Group LIMITED | Unitedkingdom | Borehamwood | The Brentano Suite | Hertfordshire | WD6 3SY | toothclub.***** | 2022 | $15,561,922 | 2 | N/A | N/A | N/A |
| 43 | Peninsula Dental Social Enterprise Cic | Unitedkingdom | Mutley | 17a Portland Villas | Plymouth | PL4 6DX | peninsula-arts.***** | 2013 | $14,998,448 | 151 | N/A | N/A | N/A |
| 44 | Todays Dental Practices LIMITED | Unitedkingdom | Ammanford | Brynteg Dental Surgery | Carmarthenshire | SA18 3AY | nhs.***** | 2021 | $14,859,634 | 54 | N/A | N/A | N/A |
| 45 | Clear Dental Care (ni) LIMITED | Unitedkingdom | Sydenham Intake | Block D 17 Heron Road | Belfast | BT3 9LE | cleardental.***** | 2011 | $12,990,533 | 154 | N/A | N/A | N/A |
| 46 | Infinityblu Healthcare LIMITED | Unitedkingdom | Pitlochry | 60-62 Atholl Road | Perth and Kinross | PH16 5BL | infinitybludental.***** | 2012 | $12,761,172 | 120 | N/A | N/A | N/A |
| 47 | Ram Dental LTD | Unitedkingdom | Timperley | 858 Chester Road | Manchester, Greater Manchester | M32 0QJ | thedentalteammanchester.***** | 2016 | $12,176,087 | 126 | N/A | N/A | N/A |
| 48 | Gdcg LIMITED | Unitedkingdom | Croydon | 124-132 Wickham Road | London | CR0 8BE | N/A | 2018 | $12,164,037 | 47 | N/A | N/A | N/A |
| 49 | Cdsa (realisations) LIMITED | Unitedkingdom | Aston | C/o Rsm UK Restructuring Advisory Llp | Birmingham, West Midlands | B3 3AG | N/A | 2014 | $11,604,851 | 478 | N/A | N/A | N/A |
| 50 | S4s (UK) LIMITED | Unitedkingdom | Deepcar | S 4 S UK Ltd | Sheffield, South Yorkshire | S3 9PT | s4sdental.***** | 2008 | $11,595,755 | 130 | N/A | N/A | N/A |
| 51 | Smile Together Dental Cic | Unitedkingdom | Truro | Truro Health Park | Cornwall | TR1 2JA | smiletogether.***** | 2012 | $11,057,711 | 128 | N/A | N/A | N/A |
| 52 | A&U Holdings LTD | Unitedkingdom | Market Harborough | Office 29 Harborough Innovation Centre | Leicestershire | LE16 7WB | N/A | 2013 | $10,925,890 | 86 | N/A | N/A | N/A |
| 53 | Total Orthodontics LIMITED | Unitedkingdom | Pye Corner | Vantage Office Park | South Gloucestershire | BS16 1GW | bupadentalcare.***** | 2007 | $10,724,590 | 64 | N/A | N/A | N/A |
| 54 | Envisage Management LIMITED | Unitedkingdom | Lychpit | Devonshire House | Hampshire | RG24 8PE | N/A | 2018 | $10,716,108 | 16 | N/A | N/A | N/A |
| 55 | Neo Orthodontics LIMITED | Unitedkingdom | Prestbury | Rose Hill | Gloucestershire | GL52 3LZ | N/A | 2017 | $10,647,701 | 59 | N/A | N/A | N/A |
| 56 | Durr Dental (products) UK LIMITED | Unitedkingdom | Desborough | 14 Linnell Way | Northamptonshire | NN16 8PS | duerruk.***** | 1998 | $10,631,710 | 13 | N/A | N/A | N/A |
| 57 | Together Dental LIMITED | Unitedkingdom | Wyatts Green | 137 High Street | Essex | CM14 4RZ | together.***** | 2019 | $10,435,881 | 500 | N/A | N/A | N/A |
| 58 | Cox & Hitchcock Dental Group LTD | Unitedkingdom | Barry | Suite G2 | The Vale of Glamorgan | CF63 2AW | N/A | 2013 | $9,883,491 | 73 | N/A | N/A | N/A |
| 59 | A&U Dental Surgeries LIMITED | Unitedkingdom | Northwich | 2 Beach Road | Cheshire West and Chester | CW8 4BA | beachroaddental.***** | 2015 | $9,855,630 | 64 | N/A | N/A | N/A |
| 60 | Ishak Practices LTD | Unitedkingdom | Forest Fields | Sherwood House | Nottingham | NG7 6LB | N/A | 2007 | $9,762,720 | 76 | N/A | N/A | N/A |
| 61 | Target Dental LIMITED | Unitedkingdom | Otley | Apex House | Leeds, West Yorkshire | LS21 1HD | carnegieclinic.***** | 2016 | $9,703,497 | 69 | N/A | N/A | N/A |
| 62 | Smethwick Practice LIMITED | Unitedkingdom | Seamer | 13 Roseberry Court | North Yorkshire | TS9 5QT | N/A | 2018 | $9,589,917 | 92 | N/A | N/A | N/A |
| 63 | Orthoworld 2000 LIMITED | Unitedkingdom | Smithills | Europa House | Manchester, Greater Manchester | M26 1GG | orthoworld.***** | 1952 | $9,548,791 | 115 | N/A | N/A | N/A |
| 64 | Forestdent LIMITED | Unitedkingdom | Saint Paul'S Cray | 5 Hayfield Road | London | BR5 2DW | N/A | 2011 | $9,506,156 | 40 | N/A | N/A | N/A |
| 65 | Malmin Orthodontic Group LTD | Unitedkingdom | Saint Johns Wood | 300 Finchley Road | London | NW3 7AG | malminortho.***** | 2018 | $9,331,326 | 56 | N/A | N/A | N/A |
| 66 | Operation Smile United Kingdom | Unitedkingdom | Upper Tooting | Operation Smile UK | London | SW18 1FY | operationsmile.***** | 2001 | $9,090,991 | 31 | N/A | N/A | N/A |
| 67 | Newham Family Dental Care LIMITED | Unitedkingdom | North Woolwich | 2 Burges Road Upton Park | London | E6 2BH | newhamdentist.***** | 2006 | $9,087,703 | 34 | N/A | N/A | N/A |
| 68 | Beacondent LIMITED | Unitedkingdom | Saint Paul'S Cray | 5 Hayfield Road | London | BR5 2DW | N/A | 2010 | $8,506,220 | 35 | N/A | N/A | N/A |
| 69 | Perfect Smile Associates LTD | Unitedkingdom | Putney | 106 Putney High Street | London | SW15 1RG | perfectsmile-dental.***** | 2010 | $8,445,332 | 31 | N/A | N/A | N/A |
| 70 | Pickering Dental Surgeries LIMITED | Unitedkingdom | Upper Holloway | 103-104 Upper Street | London | N1 1QN | pickeringdentalsurgeries.***** | 1988 | $8,437,333 | 41 | N/A | N/A | N/A |
| 71 | 2 Green Smile LTD | Unitedkingdom | Crayford | 2 Green Walk | London | DA1 4JL | 2greendental.***** | 2004 | $8,356,953 | 56 | N/A | N/A | N/A |
| 72 | Q Dental Care LIMITED | Unitedkingdom | Smithills | Europa House Europa Trading Esta | Manchester, Greater Manchester | M26 1GG | bristolorthodontics.***** | 2008 | $8,260,312 | 103 | N/A | N/A | N/A |
| 73 | Clear Dental Care (expedia) LIMITED | Unitedkingdom | Sydenham Intake | Block D | Belfast | BT3 9LE | N/A | 2019 | $8,046,965 | 40 | N/A | N/A | N/A |
| 74 | The Implant Centre LIMITED | Unitedkingdom | Haywards Heath | 5 Heath Square Boltro Road | West Sussex | RH16 1BL | theimplantcentre.***** | 2006 | $8,033,881 | 44 | N/A | N/A | N/A |
| 75 | Happy Kids Dental Practice LIMITED | Unitedkingdom | Marylebone | 74-78 Seymour Place | London | W1H 2EH | happykidsdental.***** | 2017 | $8,027,869 | 57 | N/A | N/A | N/A |
| 76 | Biohorizons Camlog UK & Ireland LTD | Unitedkingdom | Bracknell | Reflex | Bracknell Forest | RG12 1HL | biohorizons.***** | 1994 | $7,722,020 | 20 | N/A | N/A | N/A |
| 77 | 543 Dental Centre LIMITED | Unitedkingdom | Bransholme | 543-549 Anlaby Road | City of Kingston-upon-hull | HU3 6HP | 543dentalcentre.***** | 2002 | $7,447,347 | 66 | N/A | N/A | N/A |
| 78 | Pennypot Dental Practice LTD | Unitedkingdom | Curteis Corner | Henwood House | Kent | TN24 8DH | pennypotdental.***** | 2010 | $7,347,936 | 57 | N/A | N/A | N/A |
| 79 | Itooth LIMITED | Unitedkingdom | Badger Farm | 7 St. James Terrace | Hampshire | SO22 4PP | stjamesdental.***** | 2009 | $7,342,954 | 40 | N/A | N/A | N/A |
| 80 | Perfect Smile Newcastle LIMITED | Unitedkingdom | Jesmond | 44 Acorn Road | Newcastle Upon Tyne, Tyne and Wear | NE2 2DJ | perfectsmile-dental.***** | 2014 | $7,329,513 | 64 | N/A | N/A | N/A |
| 81 | Dentex Healthcare Group LIMITED | Unitedkingdom | Stepney | Techspace Whitechapel | London | E1 1LN | dentexhealth.***** | 2016 | $7,320,542 | 33 | N/A | N/A | N/A |
| 82 | Ramco Dental LIMITED | Unitedkingdom | Upper Tooting | 19 Battersea Rise | London | SW11 1HG | whiteandcodental.***** | 2013 | $7,317,118 | 42 | N/A | N/A | N/A |
| 83 | Db Orthodontics LIMITED | Unitedkingdom | Silsden | Ryefield Way | Bradford, West Yorkshire | BD20 0EF | dborthodontics.***** | 1999 | $7,316,721 | 53 | N/A | N/A | N/A |
| 84 | J.d.s.p. Dental LIMITED | Unitedkingdom | Thorpe-in-the-glebe | 13 Main Street | Nottinghamshire | NG12 5AA | treelinedentalcare.***** | 2007 | $7,296,960 | 72 | N/A | N/A | N/A |
| 85 | Codeplan LTD | Unitedkingdom | Tinsley | Agilio Bidco Software Ltd | Sheffield, South Yorkshire | S9 2RX | N/A | 2000 | $7,283,428 | 44 | N/A | N/A | N/A |
| 86 | Keith Cohen LIMITED | Unitedkingdom | Moorgate | Dentexcel | London | EC2R 7HP | dentexcel.***** | 2008 | $7,233,789 | 29 | N/A | N/A | N/A |
| 87 | Sca Trafalgar LIMITED | Unitedkingdom | Slough | 24 High Street | Slough | SL1 1EQ | sciagroup.***** | 2019 | $7,118,903 | 60 | N/A | N/A | N/A |
| 88 | Advance Dental Health LIMITED | Unitedkingdom | Stepney | 118 - 120 Commercial Road | London | E1 1NL | advancedentalhealth.***** | 2011 | $7,091,620 | 35 | N/A | N/A | N/A |
| 89 | Ashford Orthodontics LIMITED | Unitedkingdom | Marylebone | 85 Great Portland Street | London | W1W 7LT | ashfordorthodontics.***** | 2005 | $7,010,768 | 68 | N/A | N/A | N/A |
| 90 | Dental Beauty Group LTD | Unitedkingdom | Swanley | 1b High Street | Kent | BR8 8AE | dentalbeauty.***** | 2018 | $6,828,564 | 106 | N/A | N/A | N/A |
| 91 | Synergy Dental Clinic LTD | Unitedkingdom | Blackpool | 370 Central Drive | Blackpool | FY1 6LA | synergydental.***** | 2007 | $6,798,025 | 53 | N/A | N/A | N/A |
| 92 | Namta LIMITED | Unitedkingdom | Greenwich | 207 Greenwich High Road | London | SE10 8NB | greenwichdental.***** | 2011 | $6,485,855 | 30 | N/A | N/A | N/A |
| 93 | Den Dental Group Practice Llp | Unitedkingdom | Pye Corner | Vantage Office Park | South Gloucestershire | BS16 1GW | bupadentalcare.***** | 2008 | $6,449,966 | 59 | N/A | N/A | N/A |
| 94 | D J Maguire & Associates LTD | Unitedkingdom | Seagoe Lower | Bridge Street | Armagh, Banbridge and Craigavon | BT63 5AA | djmaguiredentists.***** | 1988 | $6,417,208 | 117 | N/A | N/A | N/A |
| 95 | Prestige Dental Services LIMITED | Unitedkingdom | Tamworth | The Hollies | Staffordshire | B79 7JS | prestigedentaltamworth.***** | 2007 | $6,414,782 | 61 | N/A | N/A | N/A |
| 96 | Doctor Michael Frain LIMITED | Unitedkingdom | Swindon | Clyde House Dental Surgery | Swindon | SN1 4AY | drmfrain.***** | 2008 | $6,412,803 | 63 | N/A | N/A | N/A |
| 97 | Shetland Surgery LIMITED | Unitedkingdom | Bridge of Don | Unit 8/9 | Aberdeen City | AB21 7LW | N/A | 2014 | $6,366,233 | 79 | N/A | N/A | N/A |
| 98 | Perfect Smile Surgery LIMITED | Unitedkingdom | Herne Hill | 25 Lavender Hill | London | SW11 5QW | perfectsmile-dental.***** | 2007 | $6,319,727 | 46 | N/A | N/A | N/A |
| 99 | Revive Dental Care LIMITED | Unitedkingdom | Cadishead | 72 Rocky Lane | Manchester, Greater Manchester | M30 9LY | revivedentalcare.***** | 2006 | $6,266,656 | 117 | N/A | N/A | N/A |
| 100 | Marston Green Practice LIMITED | Unitedkingdom | Seamer | 13 Roseberry Court | North Yorkshire | TS9 5QT | N/A | 2018 | $6,260,128 | 74 | N/A | N/A | N/A |