Wikipedia
The California Public Employees' Retirement System (CalPERS) is an agency in the California executive branch that "manages pension and health benefits for more than 1.6 million California public employees, retirees, and their families". In fiscal year 2012–13, CalPERS paid over $12.7 billion in retirement benefits, and in fiscal year 2013 it is estimated that CalPERS will pay over $7.5 billion in health benefits.
As of June 30, 2014, CalPERS managed the largest public pension fund in the United States, with $300.3 billion in assets CalPERS is known for its shareholder activism; stocks placed on its "Focus List" may perform better than other stocks, which has given rise to the term "CalPERS effect". Outside the U.S., CalPERS has been called "a recognized global leader in the investment industry", and "one of America's most powerful shareholder bodies".