Facebook Inc. /zigman2/quotes/205064656/composite FB -0.28% on Thursday said Robert M. Kimmitt, former deputy secretary of the Treasury and U.S. Ambassador to Germany, has been appointed to the company's board of directors as lead independent director, effective immediately. Facebook added that Jeffrey D. Zients, chief executive of The Cranemere Group Ltd., has informed the company he will not stand for re-election to Facebook's board at the company's 2020 annual shareholders meeting. Facebook shares are down 1% in the last year. The broader S&P 500 index is down 6.6% in the last year.