Park West Asset Management SC 13G/A PDL BIOPHARMA / Park West Asset Management ownership change

Exhibit 1

JOINT FILING AGREEMENT

In accordance with Rule 13d-1(k) under the Securities Exchange Act of 1934, as amended, the persons named below agree to the joint filing on behalf of them of a statement on Schedule 13G (including amendments thereto) with respect to the shares of common stock, par value $0.01 per share, of PDL Biopharma, Inc., a Delaware corporation, and further agree that this Joint Filing Agreement be included as Exhibit 1 to such Schedule 13G. In evidence thereof, the undersigned hereby execute this agreement this 28^th day of August, 2020.

PARK WEST ASSET MANAGEMENT LLC
By:	/s/ Grace Jimenez
	Name: Grace Jimenez
	Title: Chief Financial Officer

PARK WEST INVESTORS MASTER FUND, LIMITED
By:    Park West Asset Management LLC, its Investment Manager
By:	/s/ Grace Jimenez
	Name: Grace Jimenez
	Title: Chief Financial Officer

/s/ Peter S. Park

Peter S. Park