RSA Insurance Group plc (LSE: RSA), commonly known as RSA, is a global general insurance company headquartered in London, United Kingdom. It has over 20 million customers in 36 countries in Asia, Europe, North America and South America.

It is listed on the London Stock Exchange and is a constituent of the FTSE 100 Index.

The company was formed following the merger of Sun Alliance and Royal Insurance in 1996.

Sun Alliance was itself a product of the merger in 1959 of The Sun, which was founded in 1710, with The Alliance, which was founded in 1824 by Nathan Mayer Rothschild and Moses Montefiore. Sun Alliance went on to acquire London Insurance in 1965 (becoming Sun Alliance & London) and Phoenix Assurance in 1984.

Royal Insurance was founded in 1845. It acquired Liverpool & London and Globe Insurance Company in 1919. The company formally changed its name from Royal & Sun Alliance Insurance Group plc to RSA Insurance Group on 20 May 2008.

In March 2009, RSA announced plans for the shedding of 1,200 jobs from its UK operations, a reduction of around 15%.

Source: Wikipedia