The stocks and shares ISA millionaires are buying Investing Legal & General is the most-held stock among all ISA millionaires using DIY investing service Hargreaves Lansdown, with fellow insurers Phoenix and Aviva joining the firm for the most popular shares. Funds run by Legal & General also make up half of the top funds invested in by the 1,322 ISA millionaires using Hargreaves Lansdown, [...]