Below is a list of the largest UK asset managers ranked by total global AUM. Legal & General Investment Management (LGIM) is the largest fund manager responsible for US$1.3 trillion of assets under management.

 Rank Company Total AUM, US$bn  Date
1 Legal & General Investment Management 1,282 06/30/2017
2 Prudential plc 823.5 06/30/2017
3 Aberdeen Standard Investments 763.3 09/30/2017
4 Insight Investment 716.0 06/30/2017
5 Schroder Investment Management 545.0 06/30/2017
6 Old Mutual plc 512.3 12/31/2016
7 Aviva Investors 470.0 06/30/2017
8 HSBC Global Asset Management 446.4 06/30/2017
9 Aberdeen Asset Management * 395.4 06/30/2017
10 M&G Investments 377.0 06/30/2017
11 Standard Life Investments * 369.0 06/30/2017
12 Janus Henderson Investors ** 356.0 06/30/2017
13 Baillie Gifford 232.0 09/30/2017
14 Royal London Asset Management 149.0 09/30/2017
15 Man Group 103.5 09/30/2017
16 Newton Investment Management 73.7 09/30/2017
17 Ashmore Group 65.0 09/30/2017
18 Jupiter Asset Management 64.8 09/30/2017
19 Mondrian Investment Partners 62.0 09/30/2017
20 Record Currency Management 61.2 09/30/2017
21 Walter Scott & Partners 61.0 06/30/2017
22 Kames Capital 59.6 06/30/2017
23 BlueBay Asset Management 57.2 09/30/2017
24 Brown Advisory 56.0 06/30/2017
25 Northill Capital LLP 51.0 12/31/2017
26 JO Hambro Capital Management 42.0 01/30/2018
27 Colchester Global Investors 39.3 09/30/2017
28 Artemis Investment Management 38.0 01/30/2018
29 Pantheon Ventures (UK) LLP 36.9 06/30/2017
30 Intermediate Capital Group 32.0 09/30/2017
31 Winton Group 30.0 01/30/2018
32 Genesis Asset Managers 28.6 06/30/2017
33 Savills Investment Management 20.0 12/31/2017
34 Majedie Asset Management 19.0 01/30/2018
35 Veritas Asset Management 18.8 06/30/2017

* In August 2017, Aberdeen Asset Management merged with Standard Life to form Standard Life Aberdeen plc.
** Janus Henderson Investors was formed from the merger of Janus Capital Group and Henderson Global Investors in May 2017.