London Top Companies List by Market Cap as of August 2026

HSBC is Banking and Financial Services Company with Headquarters is in London, UK. Headquarters is in UK.

Rolls-Royce Holdings is Technology company that manufactures products related to aerospace and defense systems, power systems, Data Analytics, Artificial Intelligence. Headquarters is in London, UK.

Rio Tinto Group is UK and Australia based Metals and Mining Company. Company producing major products are aluminum, copper, diamonds, gold, industrial minerals (borates, titanium dioxide and salt), iron ore, and uranium. Headquarters is in UK.

They are strongly represented in Australia and North America, and also have significant businesses in Asia, Europe, Africa and South America.

Unilever is one of the largest FMCG company and is a global company selling fast-moving consumer goods. On any given day, 2.5 billion people use Unilever products. Headquarters is in UK.

Three segments of Unilever Limited manufactured products are Beauty & Personal Care, Home Care, Foods & Refreshment.

Deloitte provides Audit & Assurance services, Risk Advisory, Financial Advisory, Tax and Legal Advisory and Consulting services. Headquarters is in London, UK.

Deloitte is a provider of audit and assurance, consulting, financial advisory, risk advisory, tax and related services. They have network of member firms in more than 150 countries.

The 27 firms still operate as separate independent legal entities and provide services in their respective countries in accordance with professional standards.

British American Tobacco is UK based Tobacco related products manufacturing company with more than 55,000 employees working for it as on 2021. Headquarters is in UK.

The company products as sold in the US, including Vuse, Velo, Grizzly, Kodiak, and Camel Snus, are subject to FDA regulation and no reduced-risk claims will be made as to these products without agency clearance.

BAT brands :

• Vogue
• Viceroy
• Kool
• Peter Stuyvesant
• Craven A
• State Express 555
• Shuang Xi

PricewaterCoopers provides Audit & Assurance services, Risk Advisory, Financial Advisory, Tax Advisory and Consulting services. Headquarters is in London, UK.

For year ending June-2023, PwC annual revenue was 53.1 billion USD.
For year ending June-2022, PwC annual revenue was 50.3 billion USD.

As on 2022, PricewaterhouseCoopers had 328,000 employees in 152 countries and annual revenues of 50.3 Billion USD.

BP P.L.C. is UK based multi-national Oil and Gas company and present in more than 70 countries. Headquarters is in UK.

GLAXOSMITHKLINE is UK based multi-national Pharmaceuticals business and it has a broad portfolio of innovative and established medicines. GSK currently focus on developing new medicines in respiratory, HIV, oncology and immuno-inflammation; with an R&D approach focused on science related to the immune system, use of genetics and advanced technologies. Headquarters is in UK.

In 2021 GSK delivered 1.7 billion medicines, over 767 million vaccines* and 3.7 billion consumer healthcare products.

Ernst & Young is financial auditing, consulting and tax advisory services providing company similar to Deloitte and Prince water house Coopers. Headquarters is in London, UK. They have 700 office locations in over 150 countries.

In FY23, EY had global revenue of 49,354 million USD and it is growth of 14.2% when compared with FY22.
In FY23, EY had global revenue of 45,165 million USD.