| 1 | Paystream My Max LIMITED | Unitedkingdom | Altrincham | Mansion House | Manchester, Greater Manchester | WA14 4RW | paystream.***** | 2007 | $3,198,932,609 | 22,213 | N/A | N/A | N/A |
| 2 | Db Group Services (UK) LIMITED | Unitedkingdom | Moorgate | Winchester House | London | EC2N 2DB | deutschewealth.***** | 1994 | $2,379,393,000 | 6,767 | N/A | N/A | N/A |
| 3 | Impellam Group LIMITED | Unitedkingdom | Luton | First Floor ,mulberry House | Luton | LU1 3LU | impellam.***** | 2009 | $2,327,776,328 | 9,577 | N/A | N/A | N/A |
| 4 | Pagegroup PLC | Unitedkingdom | Addlestone | 200 Dashwood Lang Road | Surrey | KT15 2NX | N/A | 1976 | $2,204,419,134 | 7,604 | N/A | N/A | N/A |
| 5 | Hays Specialist Recruitment LIMITED | Unitedkingdom | Saint Johns Wood | 4th Floor | London | NW1 3BF | haysplc.***** | 1970 | $1,811,457,243 | 2,321 | N/A | N/A | N/A |
| 6 | Morson Group LIMITED | Unitedkingdom | Cadishead | Adamson House | Manchester, Greater Manchester | M50 1RD | morson.***** | 1992 | $1,788,596,620 | 2,322 | N/A | N/A | N/A |
| 7 | Pertemps Network Group LIMITED | Unitedkingdom | Berkswell | Meriden Hall | Solihull, West Midlands | CV7 7PT | pertempsnetwork.***** | 2011 | $1,521,608,248 | 1,517 | N/A | N/A | N/A |
| 8 | Nhs Professionals LIMITED | Unitedkingdom | Potten End | Breakspear Park | Hertfordshire | HP2 4TZ | nhsprofessionals.***** | 2008 | $1,521,195,062 | 27,931 | N/A | N/A | N/A |
| 9 | Hays PLC | Unitedkingdom | Saint Johns Wood | 4th Floor | London | NW1 3BF | haysplc.***** | 1987 | $1,416,151,757 | 12,134 | N/A | N/A | N/A |
| 10 | Staffline Group PLC | Unitedkingdom | Thorneywood | 19-20 the Triangle Ng2 Business Park | Nottingham | NG2 1AE | staffline.***** | 2012 | $1,258,681,458 | 2,317 | N/A | N/A | N/A |
| 11 | Balfour Beatty Group Employment LIMITED | Unitedkingdom | Canary Wharf | 5 Churchill Place Canary Wharf | London | E14 5HU | balfourbeatty.***** | 2012 | $1,228,253,287 | 12,730 | N/A | N/A | N/A |
| 12 | Morson Human Resources LIMITED | Unitedkingdom | Cadishead | Adamson House | Manchester, Greater Manchester | M50 1RD | morson.***** | 1969 | $1,197,462,559 | 1,147 | N/A | N/A | N/A |
| 13 | Robert Walters PLC | Unitedkingdom | Marylebone | 11-13 Slingsby Place St Martin'S Courtyard | London | WC2E 9AB | robertwalters.***** | 1986 | $1,130,899,112 | 3,619 | N/A | N/A | N/A |
| 14 | Arthur J. Gallagher Services (UK) LIMITED | Unitedkingdom | Moorgate | The Walbrook Building | London | EC4N 8AW | ajginternational.***** | 2014 | $1,098,949,723 | 8,945 | N/A | N/A | N/A |
| 15 | Reed Specialist Recruitment LIMITED | Unitedkingdom | City of London | Academy Court | London | WC2A 1DT | reed.***** | 2009 | $1,076,143,060 | 1,848 | N/A | N/A | N/A |
| 16 | If Trade CO LIMITED | Unitedkingdom | Spalding | Office 18 | Lincolnshire | PE11 1QD | aandcrecruitment.***** | 2012 | $1,036,469,447 | 27,147 | N/A | N/A | N/A |
| 17 | Guidant Global UK LIMITED | Unitedkingdom | Luton | Mulberry House Parkland Square | Luton | LU1 3LU | gategourmet.***** | 1993 | $894,377,079 | 292 | N/A | N/A | N/A |
| 18 | Staffline Recruitment LIMITED | Unitedkingdom | Thorneywood | 19-20 the Triangle | Nottingham | NG2 1AE | staffline.***** | 1986 | $861,224,263 | 692 | N/A | N/A | N/A |
| 19 | Pertemps Recruitment Partnership LIMITED | Unitedkingdom | Berkswell | Meriden Hall | Solihull, West Midlands | CV7 7PT | contact3.***** | 1987 | $779,274,766 | 650 | N/A | N/A | N/A |
| 20 | Adecco UK LIMITED | Unitedkingdom | Stepney | 10 Bishops Square | London | E1 6EG | adecco.***** | 1957 | $747,325,033 | 1,016 | N/A | N/A | N/A |
| 21 | Fl Capital Holdings LIMITED | Unitedkingdom | Tunbridge Wells | The Meeting House | Kent | TN1 1YS | freelancersltd.***** | 2000 | $743,228,260 | 665 | N/A | N/A | N/A |
| 22 | Ngage Specialist Recruitment LIMITED | Unitedkingdom | Moorgate | Fifth Floor | London | EC2R 5AR | uk.***** | 2007 | $646,961,106 | 702 | N/A | N/A | N/A |
| 23 | Amey Services LIMITED | Unitedkingdom | Iffley | The Sherard Building | Oxfordshire | OX4 4DQ | amey.***** | 1992 | $644,809,494 | 10,269 | N/A | N/A | N/A |
| 24 | Lorien Resourcing LIMITED | Unitedkingdom | Leeds | 21-23 Wellington Street | Leeds, West Yorkshire | LS1 4DL | lorien.***** | 1977 | $613,115,212 | 296 | N/A | N/A | N/A |
| 25 | Airswift Holdings LIMITED | Unitedkingdom | Cadishead | Delphian House | Manchester, Greater Manchester | M3 5FS | airswift.***** | 2015 | $584,595,222 | 656 | N/A | N/A | N/A |
| 26 | Gi Recruitment LIMITED | Unitedkingdom | Chesterfield | Unit A the Glass Yard | Derbyshire | S41 8JY | N/A | 1993 | $581,641,517 | 10,778 | N/A | N/A | N/A |
| 27 | Sanderson Solutions Group PLC | Unitedkingdom | Baptist Mills | Clifton Down House | City of Bristol | BS8 2NH | sandersonplc.***** | 1982 | $542,377,475 | 465 | N/A | N/A | N/A |
| 28 | Challenge-Trg Recruitment LIMITED | Unitedkingdom | Benchill | F R P Advisory Trading Ltd | Manchester, Greater Manchester | M2 4AB | trglogistics.***** | 2000 | $528,452,036 | 14,922 | N/A | N/A | N/A |
| 29 | Pontoon Europe LIMITED | Unitedkingdom | Stepney | 10 Bishops Square | London | E1 6EG | pontoonsolutions.***** | 1998 | $518,611,689 | 308 | N/A | N/A | N/A |
| 30 | Experis LIMITED | Unitedkingdom | Uxbridge | Capital Court | London | UB8 1AB | elanit.***** | 1987 | $491,469,321 | 420 | N/A | N/A | N/A |
| 31 | Manpower UK LIMITED | Unitedkingdom | Uxbridge | Capital Court | London | UB8 1AB | manpower.***** | 1968 | $488,248,532 | 9,923 | N/A | N/A | N/A |
| 32 | Matchtech Group (UK) LIMITED | Unitedkingdom | Anthill Common | 1450 Parkway | Hampshire | PO15 7AF | gattacaplc.***** | 1984 | $455,281,783 | 315 | N/A | N/A | N/A |
| 33 | Kpmg UK LIMITED | Unitedkingdom | Saint Albans | Aquis Court | Hertfordshire | AL3 4RF | kpmg.***** | 1998 | $452,393,843 | 8,383 | N/A | N/A | N/A |
| 34 | The Best Connection Group LIMITED | Unitedkingdom | Bromsgrove | Unit 1 | Worcestershire | B61 0GD | thebestconnection.***** | 1991 | $439,312,679 | 768 | N/A | N/A | N/A |
| 35 | Jobandtalent UK LIMITED | Unitedkingdom | Moorgate | 12 New Fetter Lane | London | EC4A 1JP | N/A | 2011 | $431,762,576 | 13,814 | N/A | N/A | N/A |
| 36 | Mach Recruitment LIMITED | Unitedkingdom | Lower Wortley | 5 Carlton Court Brown Lane West | Leeds, West Yorkshire | LS12 6LT | machrecruitment.***** | 2007 | $427,255,058 | 9,684 | N/A | N/A | N/A |
| 37 | Allegis Group LIMITED | Unitedkingdom | Bracknell | Maxis 2 | Bracknell Forest | RG12 1RT | allegisgroup.***** | 1993 | $423,201,120 | 535 | N/A | N/A | N/A |
| 38 | Shaw Trust Limited(the) | Unitedkingdom | Oldbury | Shaw Trust | Sandwell, West Midlands | B69 2DG | shaw-trust.***** | 1983 | $406,466,019 | 5,124 | N/A | N/A | N/A |
| 39 | Harvey Nash LIMITED | Unitedkingdom | Moorgate | 3 Noble Street | London | EC2V 7EE | harveynash.***** | 1988 | $373,045,559 | 280 | N/A | N/A | N/A |
| 40 | Michael Page International Recruitment LIMITED | Unitedkingdom | Marylebone | Michael Page | London | WC2R 0DT | michaelpage.***** | 1976 | $362,646,524 | 1,215 | N/A | N/A | N/A |
| 41 | Gi Group Holdings Recruitment LIMITED | Unitedkingdom | Chesterfield | Unit A | Derbyshire | S41 8JY | gigroupuk.***** | 2011 | $360,887,804 | 12,741 | N/A | N/A | N/A |
| 42 | Brook Street (UK) LIMITED | Unitedkingdom | Luton | 34 George Street | Luton | LU1 2AZ | brookstreet.***** | 1946 | $358,399,920 | 367 | N/A | N/A | N/A |
| 43 | Rwe Renewables Management UK LIMITED | Unitedkingdom | Grange Park | Windmill Hill Business Park Whitehill Way | Swindon | SN5 6PB | rwe.***** | 2019 | $357,354,485 | 1,381 | N/A | N/A | N/A |
| 44 | Orion Engineering Services LIMITED | Unitedkingdom | Farr | Orion House | Highland | IV2 6AA | N/A | 1987 | $344,500,923 | 187 | N/A | N/A | N/A |
| 45 | Blue Arrow LTD. | Unitedkingdom | Marylebone | 33 Soho Square | London | W1D 3QU | bluearrow.***** | 1959 | $341,780,476 | 10,420 | N/A | N/A | N/A |
| 46 | Lseg Employment Services LIMITED | Unitedkingdom | Moorgate | 10 Paternoster Square | London | EC4M 7LS | thelondonstockexchange.***** | 2014 | $338,348,520 | 2,453 | N/A | N/A | N/A |
| 47 | Randstad Sourceright LIMITED | Unitedkingdom | Moorgate | 8-10 Throgmorton Avenue | London | EC2N 2DL | randstadrisesmart.***** | 1999 | $331,192,064 | 493 | N/A | N/A | N/A |
| 48 | Empresaria Group PLC | Unitedkingdom | Worth Abbey | Old Church House | West Sussex | RH10 4HS | empresaria.***** | 1999 | $312,103,308 | 3,070 | N/A | N/A | N/A |
| 49 | New Bilston LIMITED | Unitedkingdom | Canary Wharf | 25 the North Colonnade | London | E14 5HS | N/A | 2004 | $309,649,367 | 2,823 | N/A | N/A | N/A |
| 50 | Rullion Engineering LIMITED | Unitedkingdom | Altrincham | Suite 11 | Manchester, Greater Manchester | WA14 1NU | rullion.***** | 1973 | $308,018,696 | 1,340 | N/A | N/A | N/A |
| 51 | Alexander Mann Solutions LIMITED | Unitedkingdom | Moorgate | 2nd Floor | London | EC2M 5TQ | weareams.***** | 1986 | $301,791,828 | 2,295 | N/A | N/A | N/A |
| 52 | Sthree Partnership Llp | Unitedkingdom | Moorgate | 75 King William Street | London | EC4N 7BE | sthreecareers.***** | 2013 | $300,902,480 | 302 | N/A | N/A | N/A |
| 53 | Air Resources LIMITED | Unitedkingdom | Manchester | Delphian House | Manchester, Greater Manchester | M3 5FS | airswift.***** | 1979 | $292,256,600 | 297 | N/A | N/A | N/A |
| 54 | G2v Recruitment Group LIMITED | Unitedkingdom | Moorgate | 4th Floor | London | EC4M 7NG | g2vgroup.***** | 2012 | $291,979,909 | 464 | N/A | N/A | N/A |
| 55 | G2v Recruitment Holdings LIMITED | Unitedkingdom | Moorgate | 4th Floor | London | EC4M 7NG | hcl.***** | 2021 | $291,979,909 | 464 | N/A | N/A | N/A |
| 56 | Investigo LIMITED | Unitedkingdom | Stepney | 10 Bishops Square | London | E1 6EG | investigo.***** | 2003 | $285,666,686 | 305 | N/A | N/A | N/A |
| 57 | Zurich Employment Services LIMITED | Unitedkingdom | Swindon | Unity Place 1 Carfax Close | Swindon | SN1 1AP | N/A | 1929 | $280,033,489 | 1,670 | N/A | N/A | N/A |
| 58 | The Skills Development Scotland CO. LIMITED | Unitedkingdom | Glasgow | Monteith House | Glasgow City | G2 1DY | skillsdevelopmentscotland.***** | 1997 | $276,775,342 | 1,390 | N/A | N/A | N/A |
| 59 | Aspen Insurance UK Services LIMITED | Unitedkingdom | Moorgate | Plantation Place | London | EC3M 3BD | aspen.***** | 2001 | $272,589,000 | 986 | N/A | N/A | N/A |
| 60 | Single Resource LIMITED | Unitedkingdom | Walsall | Forster House | Walsall, West Midlands | WS1 1XZ | jobandtalent.***** | 2003 | $256,046,507 | 9,235 | N/A | N/A | N/A |
| 61 | Nottingham City Council (nottingham Jobs) | Unitedkingdom | Thorneywood | Loxley House | Nottingham | NG2 3NG | nottinghamcity.***** | 1900 | $253,823,910 | 5,000 | N/A | N/A | N/A |
| 62 | Sanderson Managed Services LIMITED | Unitedkingdom | Baptist Mills | First Floor, Clifton Down House | City of Bristol | BS8 2NH | sandersonplc.***** | 1998 | $245,551,508 | 28 | N/A | N/A | N/A |
| 63 | La Fosse Associates LIMITED | Unitedkingdom | London | 5th Floor | London | SW1E 5BH | lafosse.***** | 2008 | $243,462,852 | 348 | N/A | N/A | N/A |
| 64 | N.R.L. LIMITED | Unitedkingdom | Winstanley | 5 Glass House Road Glass House Business Park | Manchester, Greater Manchester | WN3 6GL | nrl.***** | 1983 | $243,050,999 | 187 | N/A | N/A | N/A |
| 65 | Search Recruitment Group LIMITED | Unitedkingdom | Spinningfields | 2nd Floor Corner Block | Manchester, Greater Manchester | M3 3HN | search.***** | 2017 | $236,990,919 | 495 | N/A | N/A | N/A |
| 66 | Gap Personnel Holdings LIMITED | Unitedkingdom | Balderton | Pulford House, Bell Meadow Business Park | Cheshire West and Chester | CH4 9EP | gap-personnel.***** | 1998 | $235,544,595 | 7,266 | N/A | N/A | N/A |
| 67 | Community Resourcing LIMITED | Unitedkingdom | Moorgate | Fifth Floor | London | EC2R 5AR | resourcinggroup.***** | 2000 | $235,327,936 | 315 | N/A | N/A | N/A |
| 68 | Retinue Solutions LIMITED | Unitedkingdom | Moorgate | 5th Floor | London | EC2R 5AR | retinue-solutions.***** | 2011 | $234,981,865 | 46 | N/A | N/A | N/A |
| 69 | Nes Group LIMITED | Unitedkingdom | Altrincham | 1b Foundation | Manchester, Greater Manchester | WA14 1SG | N/A | 1998 | $231,837,737 | 224 | N/A | N/A | N/A |
| 70 | Vital Human Resources LIMITED | Unitedkingdom | Cadishead | Adamson House | Manchester, Greater Manchester | M50 1RD | morson.***** | 2006 | $214,619,830 | 241 | N/A | N/A | N/A |
| 71 | Id Medical Group LIMITED | Unitedkingdom | Wolverton | Unit 2 | Milton Keynes | MK12 5ZD | id-medical.***** | 1999 | $211,642,104 | 238 | N/A | N/A | N/A |
| 72 | Ersg Holdings LTD | Unitedkingdom | Bromley | 8th Floor, North Tower | London | BR1 1WA | ersg.***** | 2014 | $207,689,725 | 193 | N/A | N/A | N/A |
| 73 | First Technical Recruitment LIMITED | Unitedkingdom | Croft | Parry House | Warrington | WA3 7QU | firstrecruitmentgroup.***** | 1997 | $206,581,214 | 469 | N/A | N/A | N/A |
| 74 | Resource Solutions LIMITED | Unitedkingdom | Marylebone | 11-13 Slingsby Place St Martin'S Courtyard | London | WC2E 9AB | resourcesolutions.***** | 1986 | $202,323,822 | 356 | N/A | N/A | N/A |
| 75 | Search Consultancy LIMITED | Unitedkingdom | Glasgow | 5/1 | Glasgow City | G2 6HQ | search.***** | 1987 | $201,635,790 | 428 | N/A | N/A | N/A |
| 76 | Venn Group LIMITED | Unitedkingdom | Rotherhithe | 3rd Floor, Cottons Centre | London | SE1 2QP | venngroup.***** | 2000 | $198,312,631 | 288 | N/A | N/A | N/A |
| 77 | Spencer Ogden LIMITED | Unitedkingdom | Moorgate | 3rd Floor | London | EC4R 9AT | spencer-ogden.***** | 2011 | $195,478,401 | 348 | N/A | N/A | N/A |
| 78 | Teaching Personnel LIMITED | Unitedkingdom | Water End | Wallace House | Hertfordshire | AL7 1TW | teachingpersonnel.***** | 1996 | $195,347,017 | 368 | N/A | N/A | N/A |
| 79 | Shorterm LIMITED | Unitedkingdom | West Drayton | The Barn | London | UB7 7RY | shorterm.***** | 1972 | $194,174,630 | 327 | N/A | N/A | N/A |
| 80 | Premex Services LIMITED | Unitedkingdom | Smithills | Premex House | Manchester, Greater Manchester | BL6 6SX | premex.***** | 1996 | $191,458,012 | 650 | N/A | N/A | N/A |
| 81 | Cando Personnel LTD | Unitedkingdom | Gravesend | 26 Harmer Street | Kent | DA12 2AX | candopersonnel.***** | 2012 | $188,879,691 | 3,500 | N/A | N/A | N/A |
| 82 | Reed In Partnership LIMITED | Unitedkingdom | City of London | Academy Court | London | WC2A 1DT | reedinpartnership.***** | 1965 | $186,672,208 | 2,219 | N/A | N/A | N/A |
| 83 | Coyle Personnel LIMITED | Unitedkingdom | Harrow | First Floor | London | HA1 1BE | coyles.***** | 1988 | $184,156,036 | 191 | N/A | N/A | N/A |
| 84 | Amoria Bond LIMITED | Unitedkingdom | Didsbury | Egerton House | Manchester, Greater Manchester | M20 2DX | amoriabond.***** | 2006 | $183,085,429 | 306 | N/A | N/A | N/A |
| 85 | Lazard & CO., Services LIMITED | Unitedkingdom | Marylebone | 20 Manchester Square | London | W1U 3PZ | lazard.***** | 2000 | $180,316,766 | 364 | N/A | N/A | N/A |
| 86 | Nicholas Associates Holdings LIMITED | Unitedkingdom | Sheffield | 8, Europa View | Sheffield, South Yorkshire | S9 1XH | nicholasassociates.***** | 1977 | $179,465,371 | 3,571 | N/A | N/A | N/A |
| 87 | Generate Holdings LTD | Unitedkingdom | Rotherhithe | Unit 3 New Concordia Wharf | London | SE1 2BB | generate-fs.***** | 2019 | $175,575,945 | 25 | N/A | N/A | N/A |
| 88 | Bluestones Investment Group LIMITED | Unitedkingdom | Chester | Unit A | Cheshire West and Chester | CH1 6LT | bluestonesgroup.***** | 2011 | $172,845,192 | 354 | N/A | N/A | N/A |
| 89 | Ing Services LIMITED | Unitedkingdom | Moorgate | 8-10 Moorgate | London | EC2R 6DA | ing.***** | 1973 | $171,678,971 | 752 | N/A | N/A | N/A |
| 90 | Icg Global LIMITED | Unitedkingdom | Marylebone | 7 Bell Yard London England Bell Yard | London | WC2A 2JR | N/A | 2017 | $171,136,656 | 742 | N/A | N/A | N/A |
| 91 | Pro-Force LIMITED | Unitedkingdom | Street End | Hunstead House | Kent | CT4 7PE | pro-force.***** | 2005 | $165,977,134 | 5,389 | N/A | N/A | N/A |
| 92 | Red Commerce LIMITED | Unitedkingdom | City of London | 33 Gracechurch Street | London | EC3V 0BT | redsapsolutions.***** | 2000 | $162,194,924 | 285 | N/A | N/A | N/A |
| 93 | Eaglecliff LIMITED | Unitedkingdom | Sevenoaks | 30 Pembroke Road | Kent | TN13 1XR | eaglecliff.***** | 1985 | $156,838,716 | 248 | N/A | N/A | N/A |
| 94 | Day Webster LIMITED | Unitedkingdom | Loughton | Sterling House | Essex | IG10 3TS | daywebster.***** | 2009 | $153,917,899 | 173 | N/A | N/A | N/A |
| 95 | Gi Group Recruitment LTD | Unitedkingdom | Chesterfield | Unit A | Derbyshire | S41 8JY | gigroupuk.***** | 1986 | $153,766,739 | 4,461 | N/A | N/A | N/A |
| 96 | Medacs Healthcare LIMITED | Unitedkingdom | Marylebone | 33-34 Soho Square | London | W1D 3QU | N/A | 1990 | $151,360,523 | 797 | N/A | N/A | N/A |
| 97 | Sellick Partnership LIMITED | Unitedkingdom | Woodley | 43 Garners Lane | Manchester, Greater Manchester | SK3 8SD | sellickpartnership.***** | 2001 | $151,318,449 | 171 | N/A | N/A | N/A |
| 98 | Tripod Group LIMITED | Unitedkingdom | Marylebone | National House | London | W1F 0TA | N/A | 2015 | $149,553,975 | 71 | N/A | N/A | N/A |
| 99 | Randstad UK Holding LIMITED | Unitedkingdom | Luton | 450 Capability Green | Luton | LU1 3LU | randstad.***** | 1980 | $149,094,509 | 244 | N/A | N/A | N/A |
| 100 | Prospero Group Holdings LIMITED | Unitedkingdom | Moorgate | 3rd Floor | London | EC2A 2DT | prosperoteaching.***** | 2023 | $147,784,208 | 373 | N/A | N/A | N/A |