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UNITED STATES
SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, DC 20549

FORM 8-K

CURRENT REPORT PURSUANT

TO SECTION 13 OR 15(d) OF THE
SECURITIES EXCHANGE ACT OF 1934

Date of report (Date of earliest event reported): May 21, 2024

DIVERSIFIED HEALTHCARE TRUST

(Exact Name of Registrant as Specified in Its Charter)

Maryland

(State or Other Jurisdiction of Incorporation)

001-15319 |  | 04-3445278
(Commission File Number) |  | (IRS Employer Identification No.)

Two Newton Place, 255 Washington Street, Suite 300, Newton, Massachusetts 02458-1634

(Address of Principal Executive Offices) (Zip Code)

617-796-8350

(Registrant’s Telephone Number, Including Area Code)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:

¨ | Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)
¨ | Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)
¨ | Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))
¨ | Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Securities registered pursuant to Section 12(b) of the Act:

Title Of Each Class |  | Trading Symbol(s) |  | Name Of Each Exchange On Which Registered
Common Shares of Beneficial Interest |  | DHC |  | The Nasdaq Stock Market LLC
5.625% Senior Notes due 2042 |  | DHCNI |  | The Nasdaq Stock Market LLC
6.25% Senior Notes due 2046 |  | DHCNL |  | The Nasdaq Stock Market LLC

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter).

Emerging growth company ¨

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ¨

| Item 7.01. | Regulation FD Disclosure.

On May 21, 2024, Diversified Healthcare Trust posted to its website an investor presentation, a copy of which is attached hereto as Exhibit 99.1.

| Item 9.01. | Financial Statements and Exhibits.

| (d) | Exhibits.

99.1 |  | Investor Presentation dated May 21, 2024. (Furnished herewith.)
104 |  | Cover Page Interactive Data File. (Embedded within the Inline XBRL document.)

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

| DIVERSIFIED HEALTHCARE TRUST
| By: | /s/ Matthew C. Brown
| Name: | Matthew C. Brown
| Title: | Chief Financial Officer and Treasurer

Date: May 21, 2024