Nigel D. Lewis

Principal Global Investors LLC, dba Principal Asset Management (Principal AM), is a SEC-registered investment advisor headquartered in Des Moines, Iowa. The firm was founded in 1998 and is a wholly owned subsidiary of the Principal Global Investors Holding Co. (US) LLC and their ultimate parent is Principal Financial Group, Inc. (NASDAQ: PFG). Principal AM provides investment advisory services to institutional investors and individuals on a discretionary or non-discretionary basis.

The Teacher Retirement System of Texas (TRS) is a state-owned pension fund manager headquartered in Austin, Texas. The firm was founded by the Texas Legislature in 1937 to provide service and disability retirement benefits to teachers and administrators of the public school systems of Texas, which include institutions of higher education. In 1949, legislation expanded membership eligibility to include all employees of public education institutions. In 1985, TRS was assigned responsibility to administer health insurance program for public school retirees. The firm invests funds under its stewardship and delivers benefits to members as authorized by the Texas Legislature.