Chatham Asset Management SC 13D RR Donnelley & Sons / Chatham Asset Management ownership change

Exhibit 1

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 13D (including amendments thereto) with respect to the shares of common stock, par value $0.01 per share, of R.R. Donnelley & Sons Company, a Delaware corporation, and further agree that this Joint Filing Agreement be included as Exhibit 1 to such Schedule 13D. In evidence thereof, the undersigned hereby execute this agreement this 28th day of July, 2021.

July 28, 2021

Date

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