WD-40 Co. /zigman2/quotes/204555241/composite WDFC -0.11% said late Wednesday that Chief Executive Garry Ridge will retire from his post on Aug. 31 as part of a "planned leadership transition." Steve Brass, the company's chief operating officer, has been appointed CEO, effective Sept. 1. Brass will also serve on the company's board of directors, WD-40, the maker of the eponymous spray, said. Shares of WD-40 were flat in the extended session after ending the regular trading day up 2.6%.


