 The 1960s were particularly notable for the company's development, including an initial public offering in 1962 and a 1969 reorganization that introduced a holding company configuration, with the company offering clients its services under the banners of separately managed companies.In 1970, the company purchased Putnam Investments, adding a mutual fund business to its portfolio (and sold it in 2007).In 1997, the company significantly boosted its insurance brokerage business with a $1.8 billion acquisition of Johnson & Higgins, which, at the time, was one of MMC's biggest competitors in its brokerage business.