CUSIP No. 98422L107
JOINT FILING AGREEMENT
Pursuant to Rule 13d-1(k)(1) under the Securities Exchange Act of 1934, as amended, the undersigned agree, as of February 16, 2021, that only one statement containing the information required by Schedule 13G, and each amendment thereto, need be filed with respect to the ownership by each of the undersigned of shares of Common Stock of Xeris Pharmaceuticals, Inc., and such statement to which this Joint Filing Agreement is attached as Exhibit 1 is filed on behalf of each of the undersigned.
|By:||/s/ John Petry|
|John Petry, individually, as manager of Sessa Capital GP, LLC, the general partner of Sessa Capital (Master), L.P., and as manager of Sessa Capital IM GP, LLC, the general partner of Sessa Capital IM, L.P.|
|Date:||February 16, 2021|