Apples chief financial officer Peter Oppenheimer will retire at the end of September, after 18 years at the company. Luca Maestri, Apples vice president of finance, will become his successor. The role will begin to transition to Maestri in June. Luca has over 25 years of global experience in senior financial management, including roles as a public company CFO, and I am confident he will be a great CFO at Apple, Apple CEO Tim Cook said in a statement. …