| 1 | Wandsworth Council | Unitedkingdom | Upper Tooting | The Town Hall | London | SW18 2PU | wandsworth.***** | 1965 | $1,036,552,200 | 2,000 | N/A | N/A | N/A |
| 2 | Restore PLC | Unitedkingdom | Rainham | 8 Beam Reach | London | RM13 9YB | restore.***** | 2004 | $348,992,855 | 2,580 | N/A | N/A | N/A |
| 3 | Newport City Council | Unitedkingdom | Ebbw Vale | Civic Centre | Blaenau Gwent | NP20 4UR | newport.***** | 1996 | $216,269,901 | 7,000 | N/A | N/A | N/A |
| 4 | The British Library | Unitedkingdom | Saint Johns Wood | 96 Euston Road Regent'S Park | London | NW1 2DB | shop.***** | 1973 | $205,575,362 | 1,560 | N/A | N/A | N/A |
| 5 | Calderdale Metropolitan Borough Council | Unitedkingdom | Halifax | Town Hall | Calderdale, West Yorkshire | HX1 1UJ | calderdale.***** | 1900 | $101,646,854 | 3,290 | N/A | N/A | N/A |
| 6 | Laing Investments Management Services LIMITED | Unitedkingdom | Saint Giles | 1 Kingsway | London | WC2B 6AN | N/A | 1998 | $47,368,269 | 54 | N/A | N/A | N/A |
| 7 | Offsite Archive Storage And Integrated Services (UK) LIMITED | Unitedkingdom | Stanford-le-hope | West 3 Atlantic Avenue | Thurrock | SS17 9ER | oasisgroup.***** | 2008 | $43,880,867 | 242 | N/A | N/A | N/A |
| 8 | Northern Ireland Library Authority | Unitedkingdom | Lisburn | Office Suite 1 | Lisburn and Castlereagh | BT28 1TS | N/A | 2009 | $31,051,459 | 1,000 | N/A | N/A | N/A |
| 9 | Crown Records Management LIMITED | Unitedkingdom | Livingston | Cullen Square,deans Road | West Lothian | EH54 8SJ | crownrms.***** | 2006 | $29,032,453 | 116 | N/A | N/A | N/A |
| 10 | Active Northumberland | Unitedkingdom | Shieldfield | C/o Robson Laidler | Newcastle Upon Tyne, Tyne and Wear | NE2 1TJ | activenorthumberland.***** | 2013 | $25,509,002 | 860 | N/A | N/A | N/A |
| 11 | Rnib Enterprises LIMITED | Unitedkingdom | Saint Johns Wood | 154a Pentonville Road | London | N1 9JE | thepieguide.***** | 1966 | $18,602,629 | 450 | N/A | N/A | N/A |
| 12 | Defence Infrastructure Organisation | Unitedkingdom | Aston | Kingston Road | Birmingham, West Midlands | B75 7RL | gov.***** | 2018 | $18,322,777 | 600 | N/A | N/A | N/A |
| 13 | Chetham's Library | Unitedkingdom | Millennium Quarter | Long Millgate | Manchester, Greater Manchester | M3 1SB | chethams.***** | 1964 | $15,716,030 | 338 | N/A | N/A | N/A |
| 14 | Registration Of Births Deaths & Marriages | Unitedkingdom | Hengoed | Penallta House | Caerphilly | CF82 7PG | caerphilly.***** | 2002 | $15,353,899 | 500 | N/A | N/A | N/A |
| 15 | Coombe Abbey Park LIMITED | Unitedkingdom | Binley | Coombe Abbey Park | Coventry, West Midlands | CV3 2AB | coventry.***** | 1992 | $15,171,247 | 269 | N/A | N/A | N/A |
| 16 | UV&S LTD | Unitedkingdom | Hatton | Unit 2 | London | TW15 1BL | uvsinc.***** | 2013 | $14,448,475 | 49 | N/A | N/A | N/A |
| 17 | The Shakespeare Birthplace Trust | Unitedkingdom | Stratford-upon-avon | Henley Street | Warwickshire | CV37 6QW | shakespeare.***** | 1891 | $12,630,126 | 150 | N/A | N/A | N/A |
| 18 | Suffolk Together | Unitedkingdom | Ipswich | Lowestoft Central Library Clapham Road South | Suffolk | IP1 3DE | suffolk.***** | 2012 | $12,623,534 | 390 | N/A | N/A | N/A |
| 19 | The Hill Company LIMITED | Unitedkingdom | West Thurrock | Motherwell Way | Thurrock | RM20 3XD | thehillcompany.***** | 2003 | $11,426,010 | 67 | N/A | N/A | N/A |
| 20 | South Oxfordshire District Council | Unitedkingdom | Abingdon | 135 Eastern Avenue | Oxfordshire | OX14 4SB | southandvale.***** | 2002 | $10,813,494 | 350 | N/A | N/A | N/A |
| 21 | Camden Social Services | Unitedkingdom | Saint Johns Wood | 5 Pancras Square | London | N1C 4AG | camden.***** | 2011 | $9,367,652 | 300 | N/A | N/A | N/A |
| 22 | The National Library Of Scotland | Unitedkingdom | Gorgie | 57 George Iv Bridge | City of Edinburgh | EH1 1EW | nls.***** | 1925 | $9,268,709 | 300 | N/A | N/A | N/A |
| 23 | Bibliotheca LIMITED | Unitedkingdom | Cheadle | Landmark House | Manchester, Greater Manchester | SK8 7BS | bibliotheca.***** | 1999 | $8,058,202 | 81 | N/A | N/A | N/A |
| 24 | Nda Archives LIMITED | Unitedkingdom | Moor Row | Herdus House | Cumbria | CA24 3HU | N/A | 2014 | $7,478,890 | 3 | N/A | N/A | N/A |
| 25 | Motoring Picture Library | Unitedkingdom | Brockenhurst | National Motor Museum | Hampshire | SO42 7ZN | motoringpicturelibrary.***** | 2009 | $7,239,604 | 250 | N/A | N/A | N/A |
| 26 | Guildhall Library | Unitedkingdom | Moorgate | Guildhall Yard | London | EC2P 2EJ | cityoflondon.***** | 2011 | $7,228,421 | 250 | N/A | N/A | N/A |
| 27 | National Museums Northern Ireland | Unitedkingdom | Holywood | 153 Bangor Road | North Down and Ards | BT18 0EU | nmni.***** | 1998 | $6,240,931 | 202 | N/A | N/A | N/A |
| 28 | London Library | Unitedkingdom | London | The London Library | London | SW1Y 4LG | londonlibrary.***** | 1964 | $6,149,074 | 68 | N/A | N/A | N/A |
| 29 | E D M Group | Unitedkingdom | North Shoebury | Unit 2 | Southend-on-sea | SS3 9FL | edmgroup.***** | 2000 | $6,141,559 | 200 | N/A | N/A | N/A |
| 30 | Registration Of Births Deaths & Civil Ceremonies | Unitedkingdom | Maidstone | Invicta House | Kent | ME14 1XX | kent.***** | 2011 | $5,934,421 | 200 | N/A | N/A | N/A |
| 31 | Tyndale House And Institute | Unitedkingdom | Chesterton | Tyndale House | Cambridgeshire | CB3 9BA | tyndale.***** | 2015 | $5,734,264 | 24 | N/A | N/A | N/A |
| 32 | Explore York Libraries And Archives Mutual LIMITED | Unitedkingdom | York | Library Square | York | YO1 7DS | exploreyork.***** | 2014 | $5,102,083 | 101 | N/A | N/A | N/A |
| 33 | Handsworth College | Unitedkingdom | Soho | Birmingham City Council | Birmingham, West Midlands | B18 7BH | birmingham.***** | 1897 | $4,634,354 | 150 | N/A | N/A | N/A |
| 34 | St Helens Metropolitan Borough Council | Unitedkingdom | Parr | Hardshaw Brook Depot | Saint Helens, Merseyside | WA9 1JR | sthelens.***** | 2011 | $4,634,354 | 150 | N/A | N/A | N/A |
| 35 | Leisure Centre | Unitedkingdom | Wigan | Wigan Life Centre | Manchester, Greater Manchester | WN1 1NJ | inspiringhealthylifestyles.***** | 2015 | $4,634,354 | 150 | N/A | N/A | N/A |
| 36 | Bill Bryson Library | Unitedkingdom | Durham | University Library | Durham | DH1 3LY | durham.***** | 2011 | $4,626,189 | 160 | N/A | N/A | N/A |
| 37 | Bromley Central Library | Unitedkingdom | Bromley | 104-108 High Street | London | BR1 1EY | better.***** | 2002 | $4,606,169 | 150 | N/A | N/A | N/A |
| 38 | Didcot Community Education Centre | Unitedkingdom | Didcot | 197 Broadway | Oxfordshire | OX11 8RU | dce.***** | 2009 | $4,575,462 | 149 | N/A | N/A | N/A |
| 39 | The Forum Trust LIMITED | Unitedkingdom | Norwich | The Forum Trust Ltd | Norfolk | NR2 1TF | theforumnorwich.***** | 2001 | $4,475,100 | 44 | N/A | N/A | N/A |
| 40 | British Pathe LIMITED | Unitedkingdom | London | Canterbury Court | London | SW9 6DE | britishpathe.***** | 1988 | $4,279,558 | 7 | N/A | N/A | N/A |
| 41 | Young Gloucestershire LIMITED | Unitedkingdom | Gloucester | The Old Dock Office | Gloucestershire | GL1 1NW | youngglos.***** | 1981 | $3,993,689 | 84 | N/A | N/A | N/A |
| 42 | Luton Cultural Services Trust | Unitedkingdom | Luton | The Hat Factory Arts Centre | Luton | LU1 2EY | lutonculture.***** | 2008 | $3,827,971 | 44 | N/A | N/A | N/A |
| 43 | United Supplies LIMITED | Unitedkingdom | Aberdeen | United House | Aberdeen City | AB11 5NS | unitedsuppliesltd.***** | 1986 | $3,731,973 | 28 | N/A | N/A | N/A |
| 44 | Elm Bank Teachers Centre | Unitedkingdom | Coventry | Mile Lane | Coventry, West Midlands | CV1 2LQ | coventry.***** | 1974 | $3,684,935 | 120 | N/A | N/A | N/A |
| 45 | Wlhc Projectco LIMITED | Unitedkingdom | Nottingham | G1 Ash Tree Court | Nottingham | NG8 6PY | N/A | 2009 | $3,568,740 | 33 | N/A | N/A | N/A |
| 46 | University Of St Andrews Library | Unitedkingdom | Saint Andrews | North Street | Fife | KY16 9TR | st-andrews.***** | 1997 | $3,562,105 | 116 | N/A | N/A | N/A |
| 47 | Swansea Library & Information Service | Unitedkingdom | Swansea | Civic Centre | Swansea | SA1 3SN | swansea.***** | 2011 | $3,437,776 | 120 | N/A | N/A | N/A |
| 48 | Belfast Central Library | Unitedkingdom | Belfast | Central Library | Belfast | BT1 1EA | librariesni.***** | 2002 | $3,070,779 | 100 | N/A | N/A | N/A |
| 49 | Arts & Social Science Library Within University Of Bristol | Unitedkingdom | Tyndalls Park | Arts & Social Science Library | City of Bristol | BS8 1TJ | bristol.***** | 2011 | $3,070,779 | 100 | N/A | N/A | N/A |
| 50 | Milton Keynes Central Library | Unitedkingdom | Milton Keynes | Milton Keynes Library | Milton Keynes | MK9 3HL | milton-keynes.***** | 1980 | $3,070,779 | 100 | N/A | N/A | N/A |
| 51 | Blackburn Central Library | Unitedkingdom | Lower Darwen | Blackburn Central Library | Blackburn With Darwen | BB2 1AG | blackburn.***** | 2012 | $3,070,779 | 100 | N/A | N/A | N/A |
| 52 | Mitchell Library | Unitedkingdom | Drumchapel | North Street | Glasgow City | G3 7DN | glasgowlife.***** | 2002 | $3,070,779 | 100 | N/A | N/A | N/A |
| 53 | Waltham Forest Community Learning & Skills Service | Unitedkingdom | Walthamstow | 398 Hoe Street | London | E17 9AA | N/A | 2011 | $3,069,532 | 100 | N/A | N/A | N/A |
| 54 | Croydon Public Library | Unitedkingdom | Kenley | Croydon Clocktower | London | CR9 1ET | croydon.***** | 2019 | $3,040,072 | 99 | N/A | N/A | N/A |
| 55 | The Wiener Holocaust Library | Unitedkingdom | Saint Giles | 29 Russell Square | London | WC1B 5DP | wienerholocaustlibrary.***** | 1958 | $3,009,342 | 23 | N/A | N/A | N/A |
| 56 | Gloucestershire Royal N H S Trust | Unitedkingdom | Gloucester | Gloucester Royal Hospital | Gloucestershire | GL1 3NN | nhs.***** | 2009 | $2,935,092 | 95 | N/A | N/A | N/A |
| 57 | Libraries Central Branches Southend On Sea | Unitedkingdom | North Shoebury | Victoria Avenue | Southend-on-sea | SS2 6EX | southend.***** | 2011 | $2,902,015 | 100 | N/A | N/A | N/A |
| 58 | Somerset Archives & Local Studies | Unitedkingdom | Staplegrove | Somerset Heritage Centre | Somerset | TA2 6SF | swheritage.***** | 2016 | $2,780,612 | 90 | N/A | N/A | N/A |
| 59 | Lossiemouth Sports & Community Centre | Unitedkingdom | Lossiemouth | Coulardbank Road | Moray | IV31 6JW | moray.***** | 1981 | $2,763,701 | 90 | N/A | N/A | N/A |
| 60 | Willingdon Community Hub Library Trust | Unitedkingdom | Willingdon | Willingdon Community Hub Library | East Sussex | BN20 9PN | willingdonlibrary.***** | 2019 | $2,498,040 | 80 | N/A | N/A | N/A |
| 61 | Explore Enterprises LIMITED | Unitedkingdom | York | York Central Library | York | YO1 7DS | exploreyork.***** | 2015 | $2,471,655 | 80 | N/A | N/A | N/A |
| 62 | Slough Library | Unitedkingdom | Slough | Slough Central Library | Slough | SL1 1EA | slough.***** | 1971 | $2,457,663 | 85 | N/A | N/A | N/A |
| 63 | Libraries Connected | Unitedkingdom | Cronton | Mail Box 1201 | Knowsley, Merseyside | L36 8HT | N/A | 2011 | $2,363,328 | 13 | N/A | N/A | N/A |
| 64 | East Sussex County Council - Bibliographic Services | Unitedkingdom | Hailsham | Unit D | East Sussex | BN27 3GU | eastsussex.***** | 1996 | $2,313,094 | 80 | N/A | N/A | N/A |
| 65 | Lanchester Library | Unitedkingdom | Coventry | Frederick Lanchester Building | Coventry, West Midlands | CV1 5DD | coventry.***** | 1998 | $2,313,094 | 80 | N/A | N/A | N/A |
| 66 | Newton Heath Library | Unitedkingdom | Benchill | Old Church Street | Manchester, Greater Manchester | M40 2JE | manchester.***** | 2011 | $2,313,094 | 80 | N/A | N/A | N/A |
| 67 | Peterborough Culture, Heritage, Learning And Leisure LTD | Unitedkingdom | Peterborough | Town Hall | Peterborough | PE1 1HF | bijoupeterborough.***** | 2023 | $2,289,209 | 11 | N/A | N/A | N/A |
| 68 | Boots Library | Unitedkingdom | Nottingham | Boots Library | Nottingham | NG1 5LS | ntu.***** | 1998 | $2,185,785 | 70 | N/A | N/A | N/A |
| 69 | The Maltings LIMITED | Unitedkingdom | Llanedeyrn | East Tyndall Street | Cardiff | CF24 5EZ | space2b.***** | 1978 | $2,184,091 | 19 | N/A | N/A | N/A |
| 70 | Richmond Upon Thames Social Services | Unitedkingdom | Twickenham | 2nd Floor | London | TW1 3BW | richmond.***** | 2019 | $2,149,545 | 70 | N/A | N/A | N/A |
| 71 | Forensic Archive LTD | Unitedkingdom | Birmingham | Unit 29 | Birmingham, West Midlands | B24 8HZ | N/A | 1991 | $2,076,266 | 22 | N/A | N/A | N/A |
| 72 | Chelmsford Central Library | Unitedkingdom | Chelmsford | County Library | Essex | CM1 1GE | essex.***** | 1988 | $2,031,410 | 70 | N/A | N/A | N/A |
| 73 | The Rothschild Archive LIMITED | Unitedkingdom | City of London | The Rothschild Archive New Court | London | EC4N 8AL | rothschildandco.***** | 1999 | $2,024,283 | 6 | N/A | N/A | N/A |
| 74 | Birmingham Register Office | Unitedkingdom | Aston | Holliday Street | Birmingham, West Midlands | B1 1TJ | birmingham.***** | 2011 | $2,014,783 | 70 | N/A | N/A | N/A |
| 75 | The Bishopsgate Foundation | Unitedkingdom | Moorgate | Bishopsgate | London | EC2M 4QH | bishopsgate.***** | 2002 | $2,011,611 | 26 | N/A | N/A | N/A |
| 76 | Institute Advanced Legal Studies | Unitedkingdom | Saint Giles | Charles Clore House | London | WC1B 5DR | ials.***** | 2012 | $2,008,221 | 65 | N/A | N/A | N/A |
| 77 | Royal College Of Veterinary Surgeons Trust | Unitedkingdom | Finsbury | Rcvs Trust | London | EC1R 4RB | N/A | 1958 | $1,963,419 | 22 | N/A | N/A | N/A |
| 78 | Agile Document Solutions LIMITED | Unitedkingdom | Hoddesdon | Unit 24 | Hertfordshire | EN11 0DE | e-docsuk.***** | 1999 | $1,892,429 | 29 | N/A | N/A | N/A |
| 79 | Swansea Library | Unitedkingdom | Swansea | Civic Centre | Swansea | SA1 3SN | swansea.***** | 2008 | $1,873,530 | 60 | N/A | N/A | N/A |
| 80 | Russiateleradio Worldwide LIMITED | Unitedkingdom | Marylebone | 179 Wardour Street | London | W1F 8WY | N/A | 2000 | $1,870,299 | 19 | N/A | N/A | N/A |
| 81 | Royal Philatelic Society London | Unitedkingdom | Moorgate | 15 Abchurch Lane | London | EC4N 7BW | rpsl.***** | 1983 | $1,866,463 | 24 | N/A | N/A | N/A |
| 82 | University Of Sheffield | Unitedkingdom | Sheffield | St. Georges Library | Sheffield, South Yorkshire | S1 4DT | shef.***** | 2011 | $1,853,741 | 60 | N/A | N/A | N/A |
| 83 | West Kidlington Friends | Unitedkingdom | Kidlington | West Kidlington Primary School | Oxfordshire | OX5 1EA | west-kidlington.***** | 2002 | $1,853,741 | 60 | N/A | N/A | N/A |
| 84 | Manchester City Library | Unitedkingdom | Spinningfields | Library Elliot House | Manchester, Greater Manchester | M3 3WD | manchester.***** | 2011 | $1,817,554 | 60 | N/A | N/A | N/A |
| 85 | Calibre Audio | Unitedkingdom | Bierton | Calibre Audio | Buckinghamshire | HP22 5XQ | calibreaudio.***** | 1983 | $1,816,236 | 27 | N/A | N/A | N/A |
| 86 | Havering Library Service | Unitedkingdom | Romford | Central Library | London | RM1 3AR | havering.***** | 2015 | $1,741,209 | 60 | N/A | N/A | N/A |
| 87 | Wrexham Waterworld | Unitedkingdom | Wrexham | Holt Street | Wrexham | LL13 8DH | freedom-leisure.***** | 1998 | $1,734,821 | 60 | N/A | N/A | N/A |
| 88 | Thurston Building Supplies LIMITED | Unitedkingdom | Badwell Ash | Norton Road | Suffolk | IP31 3PB | suffolk.***** | 1998 | $1,725,576 | 18 | N/A | N/A | N/A |
| 89 | Calibre | Unitedkingdom | Bierton | New Road | Buckinghamshire | HP22 5XQ | calibre.***** | 1974 | $1,676,778 | 54 | N/A | N/A | N/A |
| 90 | Glasgow Women's Library LIMITED | Unitedkingdom | Drumchapel | 23 Landressy Street | Glasgow City | G40 1BP | womenslibrary.***** | 1994 | $1,624,967 | 26 | N/A | N/A | N/A |
| 91 | Institut Francais Du Royaume - Uni | Unitedkingdom | South Kensington | 17 Queensberry Place | London | SW7 2DT | institutfrancais.***** | 2012 | $1,606,576 | 52 | N/A | N/A | N/A |
| 92 | Wiltshire & Swindon History Centre | Unitedkingdom | Chippenham | Cocklebury Road | Wiltshire | SN15 3QN | wshc.***** | 2011 | $1,552,572 | 50 | N/A | N/A | N/A |
| 93 | The Bahamas Maritime Authority | Unitedkingdom | Moorgate | 120 Old Broad Street | London | EC2N 1AR | bahamasmaritime.***** | 2007 | $1,544,784 | 50 | N/A | N/A | N/A |
| 94 | Medbrief | Unitedkingdom | Aston | Unit 5 | Birmingham, West Midlands | B6 4DY | N/A | 2018 | $1,535,389 | 50 | N/A | N/A | N/A |
| 95 | Cardiff Central Library Hub | Unitedkingdom | Cardiff | Mill Lane | Cardiff | CF10 1FL | cardiffhubs.***** | 1989 | $1,535,389 | 50 | N/A | N/A | N/A |
| 96 | Cardiff Library | Unitedkingdom | Cardiff | Mill Lane | Cardiff | CF10 1FL | cardiff.***** | 2011 | $1,535,389 | 50 | N/A | N/A | N/A |
| 97 | East Riding Of Yorkshire Council Mobile Service Libraries | Unitedkingdom | Catfoss | Council Offices | East Riding of Yorkshire | HU11 5HN | eastriding.***** | 2011 | $1,534,766 | 50 | N/A | N/A | N/A |
| 98 | March & Wisbech Registration Office | Unitedkingdom | March | March Library | Cambridgeshire | PE15 9LT | cambridgeshire.***** | 2012 | $1,526,898 | 50 | N/A | N/A | N/A |
| 99 | Core Libraries & Arts Information Services | Unitedkingdom | Solihull | The Core | Solihull, West Midlands | B91 3RG | solihull.***** | 2003 | $1,526,898 | 50 | N/A | N/A | N/A |
| 100 | Huddersfield Library | Unitedkingdom | Huddersfield | Civic Centre | Kirklees, West Yorkshire | HD1 2NE | kirklees.***** | 2002 | $1,526,898 | 50 | N/A | N/A | N/A |