Hargreaves Lansdown (HL) is one of the biggest UK platforms for individual investors. It serves more than 1.5 million clients with a total of £120 billion in Assets Under Management. It is also listed in the FTSE 100 index, the most significant UK stock index.Hargreaves Lansdown (HL) is one of the biggest UK platforms for individual investors. It serves more than 1.5 million clients with a total of £120 billion in Assets Under Management. It is also listed in the FTSE 100 index, the most significant UK stock index.