Exhibit A

Joint Filing Agreement

The undersigned hereby agree that the statement on Schedule 13G with respect to the Class B Common Stock of Universal Health Services, Inc., dated as of February 14, 2017, is, and any amendments thereto (including amendments on Schedule 13D) signed by each of the undersigned shall be, filed on behalf of each of us pursuant to and in accordance with the provisions of Rule 13d-1(k) under the Securities Exchange Act of 1934.

Date:  February 14, 2017

MAVERICK CAPITAL, LTD.
By:	Maverick Capital Management, LLC
	Its General Partner
	By:	Lee S. Ainslie III, Manager
		By:	/s/ Anne K. Hill
			Anne K. Hill
			Under Power of Attorney dated
			February 13, 2017

MAVERICK CAPITAL MANAGEMENT, LLC
By:	Lee S. Ainslie III, Manager
	By:	/s/ Anne K. Hill
		Anne K. Hill
		Under Power of Attorney dated
		February 13, 2017

LEE S. AINSLIE III
By:	/s/ Anne K. Hill
	Anne K. Hill
	Under Power of Attorney dated
	February 13, 2017

ANDREW H. WARFORD
By:	/s/ Anne K. Hill
	Anne K. Hill
	Under Power of Attorney dated
	February 13, 2017