Angry investors in beleaguered class action law firm Slater & Gordon plan to protest on Friday over big bonuses being paid to executives and the board, despite a $1.02 billion full-year loss following last year's disastrous UK acquisition.

Building products giant Boral, listed fund manager Perpetual and struggling distributor Hills also face fiery shareholder meetings on Thursday and Friday as investors take issue with a range of executive pay and performance issues.