NEW YORK (Bloomberg) — Money manager Bill Miller ploughed more money into the financial-services industry, disclosing that his Legg Mason Opportunity Trust acquired stakes in Bermuda-based bond insurer Assured Guaranty Ltd. and Freddie Mac.

The $4.5 billion Opportunity Trust bought 20 million shares of Freddie Mac, the second-largest US mortgage-finance company, since the first quarter ended, according to a filing with the US Securities and Exchange Commission. Opportunity Trust and other funds managed by Baltimore-based Legg Mason Inc. now rank as the largest shareholders of Freddie Mac with a stake of 12.4 percent, an increase from 7.8 percent in March.

At Assured Guaranty, which has already received substantial backing from billionaire Wilbur Ross, Opportunity Trust acquired a 6.1-percent stake comprised of 5.5 million common shares, according to a separate SEC filing.