The undersigned hereby agree that the statement on Schedule 13G/A with respect to the Common Stock, $0.01 par value of Envision Healthcare Corporation, dated as of February 14, 2019, 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.

	MAVERICK CAPITAL, LTD.
	By:	Maverick Capital Management, LLC
		Its General Partner
		By:	Lee S. Ainslie III, Manager
			By:	/s/ Mark Gurevich
				Mark Gurevich
				Under Power of Attorney dated
				March 15, 2018

 

 

	MAVERICK CAPITAL MANAGEMENT, LLC
	By:	Lee S. Ainslie III, Manager
		By:	/s/ Mark Gurevich
			Mark Gurevich
			Under Power of Attorney dated
			March 15, 2018

 

 

	LEE S. AINSLIE III
	By:	/s/ Mark Gurevich
		Mark Gurevich
		Under Power of Attorney dated
		March 15, 2018

 

 

	ANDREW H. WARFORD
	By:	/s/ Mark Gurevich
		Mark Gurevich
		Under Power of Attorney dated
		March 16, 2018