The story
The company was founded in 1969 by British & Commonwealth and acquired by Banque Indosuez in 1989. It was first listed on the London Stock Exchange in 1993. It was then bought by NatWest in 1996 and by Nationwide Mutual Insurance Company in 2000 before becoming part of the investment portfolio of Hellman & Friedman, a private equity fund, in 2006. It was re-listed on the London Stock Exchange in December 2009.
Henderson Group announced its acquisition of the company in January 2011.
From Wikipedia’s article on Gartmore Group, shared under CC BY-SA 4.0.4