Chatham Asset Management SC 13G/A RR Donnelley & Sons / Chatham 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 the R.R. Donnelley & Sons Company., 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 21st day of May, 2021.

CHATHAM ASSET MANAGEMENT, LLC

By: /s/ Anthony Melchiorre

Name:	Anthony Melchiorre
Title:	Managing Member

CHATHAM ASSET HIGH YIELD MASTER FUND, LTD.

By: Chatham Asset Management, LLC , its Investment Manager

By: /s/ Anthony Melchiorre

	Name:	Anthony Melchiorre
	Title:	Managing Member
/s/ Anthony Melchiorre
Anthony Melchiorre