CHICAGO— Investor Sam Zell has increased his stake in Starwood Hotels & Resorts Worldwide to over 8%, fueling speculation he may attempt a takeover. According to SEC filings, Zells Equity Group Investments, LLC, and Starwood entered into a confidentiality agreement last week. Starwoods share price has been trading at about $20, down from a 52-week high of $56. News of the confidentiality agreement was reported in both The New York Times and the Chicago Tribune.
