List of largest United Kingdom–based law firms
This is a list of the world's largest United Kingdom–based law firms by revenue in the financial year 2024. This data is based on the law firms official financial report for the 2023/24 financial year running from 1 April 2023 to 31 March 2024. The list contains the 17 law firms which generated over half a billion US dollars in this period. 16 of which are London-based and 1 headquarter in Manchester.
A few UK-based law firms have merged with another entity which may be located outside of the UK. For example, Allen & Overy merged with Shearman in May 2024; the result of this is the removal of the US revenue and number of lawyers from the list to account for its UK operations. Some data from the number of lawyers at the firms are from the 2022/23 financial year, as the firms have not updated as of January 2025.
| Firm | Revenue | Number of practicing Lawyers | Revenue per Lawyer | Headquartered |
| Clifford Chance | $2.810 billion | 3,319 | $846,641 | London, England |
| Linklaters | $2.730 billion | 3,075 | $887,805 | London, England |
| Allen & Overy | $2.690 billion | 3,358 | $801,073 | London, England |
| Freshfields BD | $2.550 billion | 2,038 | $1,251,227 | London, England |
| Herbert Smith Freehills | $1,594 billion | 2,299 | $693,345 | London, England |
| Ashurst | $1,173 billion | 1,719 | $682,373 | London, England |
| Clyde & Co | $1,043 billion | 2,138 | $487,839 | London, England |
| Eversheds Sutherland | $0.915 billion | 2,616 | $349,770 | London, England |
| Bryan Cave Leighton Paisner | $0.840 billion | 1,275 | $658,824 | London, England |
| Slaughter & May | $0.805 billion | 594 | $1,355,219 | London, England |
| Pinsent Masons | $0.793 billion | 2,330 | $340,343 | London, England |
| Simmons & Simmons | $0.701 billion | 974 | $719,713 | London, England |
| Bird & Bird | $0.665 billion | 1,600 | $415,625 | London, England |
| Addleshaw Goddard | $0.606 billion | 1,197 | $506,267 | London, England |
| Taylor Wessing | $0.587 billion | 1,179 | $497,880 | London, England |
| Osborne Clarke | $0.543 billion | 1,205 | $450,622 | London, England |
| DWF | $0.531 billion | 1,100 | $482,727 | Manchester, England |
This is a list of the world's largest United Kingdom–based law firms by revenue in the financial year 2022.
| Global rank | Firm | Revenue | Lawyers | Revenue per lawyer |
| 12 | Allen & Overy | $2,597,910,000 | 2,821 | $921,000 |
| 13 | Clifford Chance | $2,550,900,000 | 2,547 | $1,002,000 |
| 16 | Linklaters | $2,350,490,000 | 2,684 | $876,000 |
| 17 | Freshfields Bruckhaus Deringer | $2,276,264,000 | 2,062 | $1,104,000 |
| 24 | CMS (EEIG) | $1,964,175,000 | 4,334 | $453,000 |
| 35 | Herbert Smith Freehills | $1,467,201,000 | 2,299 | $638,000 |
| 36 | Eversheds Sutherland | $1,453,516,562 | 2,616 | $556,000 |
| 55 | Ashurst | $1,087,411,000 | 1,719 | $633,000 |
| 65 | Clyde & Co. | $975,577,000 | 2,148 | $454,000 |
| 74 | Bryan Cave Leighton Paisner | $845,190,000 | 1,190 | $710,000 |
| 81 | Pinsent Masons | $749,559,000 | 1,728 | $434,000 |
| 83 | Slaughter and May | $729,889,000 | 594 | $1,229,000 |
| 92 | Simmons & Simmons | $644,529,000 | 973 | $662,000 |
| 96 | Bird & Bird | $612,365,000 | 1,543 | $397,000 |
| 107 | Addleshaw Goddard | $548,035,000 | 1,197 | $458,000 |
| 109 | Taylor Wessing | $543,087,000 | 1,079 | $503,000 |
| 126 | DWF | $470,222,000 | 694 | $678,000 |
| 128 | Osborne Clarke | $465,603,000 | 1,205 | $386,000 |
| 129 | Fieldfisher | $457,727,000 | 779 | $588,000 |
| 147 | Kennedys | $387,930,000 | 1,123 | $345,000 |
| 150 | DAC Beachcroft | $371,130,000 | 1,166 | $318,000 |
| 152 | Macfarlanes | $366,929,000 | 404 | $909,000 |
| 154 | Withers | $356,285,000 | 778 | $458,000 |
| 158 | Irwin Mitchell | $341,934,000 | 816 | $419,000 |
| 169 | Mishcon de Reya | $315,461,000 | 545 | $579,000 |
| 186 | Stephenson Harwood | $282,059,000 | 507 | $556,000 |
| 188 | HFW | $278,768,000 | 495 | $563,000 |
| 194 | Watson Farley & Williams | $266,471,000 | 579 | $460,000 |
This list excludes firms with a large presence in the UK that structure their operations as a Swiss Verein. This is because these firms structurally differ from the firms listed above, especially when it comes to sharing profits. Some of these firms include DLA Piper, Baker McKenzie, Dentons, Norton Rose Fulbright and Squire Patton Boggs among others.