EX-99.A 2 d151412dex99a.htm EX-99.A

EX-99.A

13G

CUSIP No. 909214306 Page 12 of 12 pages

EXHIBIT A

JOINT FILING AGREEMENT

The undersigned hereby agree that the statement on Schedule 13G filed herewith signed by each of the undersigned shall be filed on behalf of each of the undersigned pursuant to and in accordance with the provisions of Rule 13d-1(k) under the Securities Exchange Act of 1934, as amended.

IN WITNESS WHEREOF, the undersigned have executed this Agreement as of the 1st day of March 2016.

Dated: March 1, 2016

JHL CAPITAL GROUP LLC, a Delaware limited liability company
By:		/s/ James H. Litinsky
		Name:		James H. Litinsky
		Title:		Chief Executive Officer
JHL CAPITAL GROUP MASTER FUND L.P., a Cayman Islands limited partnership
		By: JHL CAPITAL GROUP MASTER FUND GP LTD., a Cayman Islands exempted company, its General Partner
		By:		/s/ James H. Litinsky
				Name:		James H. Litinsky
				Title:		Director
JHL CAPITAL GROUP MASTER FUND GP LTD., a Cayman Islands exempted company
By:		/s/ James H. Litinsky
		Name:		James H. Litinsky
		Title:		Director
JHL CAPITAL GROUP L.P., a Delaware limited partnership
		By: JHL CAPITAL GROUP GP LLC, a Delaware limited liability company, its General Partner
		By:		/s/ James H. Litinsky
				Name:		James H. Litinsky
				Title:		Authorized Signatory
/s/ James H. Litinsky
James H. Litinsky