Filed by Office Properties Income Trust

Commission File No. 001-34364

pursuant to Rule 425 under the Securities Act of 1933

and deemed filed as definitive additional materials

under the Securities Exchange Act of 1934

Subject Company: Diversified Healthcare Trust

Commission File No. 001-15319

Registration Statement on Form S-4: 333-272105

Date: July 21, 2023

On July 21, 2023, Office Properties Income Trust posted the following materials to its website at www.opireit.com.