UPDATE 2-ISS recommends against Instructure's proposed sale to Thoma Bravo -note

Four investment firms opposing the sale of U.S. educational software company Instructure Inc to private equity firm Thoma Bravo picked up support on Monday when an influential proxy advisory firm came out against the planned all-cash deal of roughly $2 billion. Institutional Shareholder Services Inc (ISS) recommended that Instructure shareholders vote against the company's planned sale to the private equity firm at a Feb. 13 meeting.