A summary of Southern California-related business litigation developments during the week of Nov. 12.

CalMat Settles Greenmail Suit: The Los Angeles-based company settled a class-action suit Tuesday in which shareholders charged the company with paying greenmail to fend off the takeover advances of New Zealand financier Sir Ronald Brierley. In the settlement, CalMat agreed to repurchase 1 million shares of its stock, pay a special dividend of 10 cents a share and sell real estate for the benefit of shareholders. An attorney for shareholders estimated the value of the settlement at $60 million. The action against the company by a group of CalMat shareholders had been filed in Los Angeles County Superior Court. (Filed Aug. 10, 1988, Case No. CA-001-130)