London Stock Exchange (UK) trading: largest insurance companies by market cap 2023

As of August 2023, Marsh & McLennan had the highest market cap of any insurance company trading on the London Stock Exchange (LSE). Market capitalization is the outstanding value of a company's shares and is often used to measure the size of a company and investors interest in each enterprise.

London Stock Exchange

As of July 2023, there were just under 2,000 companies trading on the London Stock Exchange, and on average somewhere around 500,000 trades per day. The combined market value of companies trading on the LSE was 3.6 trillion British pounds (GBP) in July 2023, below the peaks found prior to the COVID-19 pandemic.

Initial public offerings (IPOs)

When a private company first offers its shares to the public, the process is called an initial public offering (IPO). IPO’s are often used by growing companies that need to raise capital or by allowing owners to sell off some of their ownership of a company. The Kazakhstani technology-focused bank Kaspi saw the highest initial public offering in 2020 of over six billion British pounds.