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UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, D.C. 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): January 30, 2026

OFFICE PROPERTIES INCOME TRUST

(Exact Name of Registrant as Specified in Its Charter)

Maryland

(State or Other Jurisdiction of Incorporation)

001-34364 |  | 26-4273474
(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)

617-219-1440

(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
N/A |  | N/A |  | N/A

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. ¨

In this Current Report on Form 8-K, the terms “OPI,” “the Company,” “we,” “us,” and “our” refer to Office Properties Income Trust.

Item 7.01. Regulation FD Disclosure.

As previously disclosed, on October 30, 2025, OPI and certain of its subsidiaries (collectively, the “Debtors”) commenced voluntary cases (the “Chapter 11 Cases”) under chapter 11 of title 11 of the United States Code (the “Bankruptcy Code”) in the United States Bankruptcy Court for the Southern District of Texas (the “Bankruptcy Court”). The Chapter 11 Cases are being filed to implement a court-supervised financial restructuring pursuant to the terms described in that certain Restructuring Support Agreement entered into on October 30, 2025 among the Debtors and the other parties thereto (the “RSA”). The Debtors’ Chapter 11 Cases are jointly administered under the caption “In re Office Properties Income Trust, et al.”

Monthly Operating Reports

On January 30, 2026, the Debtors filed their Monthly Operating Reports (the “MORs”) with the Bankruptcy Court. The MORs provide financial and operational information regarding the Company's performance during the period of December 1, 2025 through December 31, 2025. On February 10, 2026, certain of the Debtors, including OPI, filed amended MORs to reflect interest expense adjustments as compared with the previously filed MORs, including the reclassification of certain interest to OPI. The Debtors continue to operate their businesses and manage their properties as debtors-in-possession under the jurisdiction of the Bankruptcy Court and in accordance with the applicable provisions of the Bankruptcy Code and orders of the Bankruptcy Court.

OPI’s amended MOR is attached as Exhibit 99.1. Copies of the MORs and other filings with the Bankruptcy Court related to the Chapter 11 Cases are available for review and download, free of charge, on the website of the Debtors’ claims, noticing, and solicitation agent at https://restructuring.ra.kroll.com/OPI or through the Bankruptcy Court's website, for a fee, at https://ecf.txsb.uscourts.gov. The information contained on, or that may be accessed through, the websites referenced in this Current Report on Form 8-K in each case is not incorporated by reference into, and is not a part of, this Current Report on Form 8-K.

Cautionary Statement Regarding the MORs

The Company cautions investors and potential investors not to place undue reliance upon the information contained in the MORs, which were not prepared for the purpose of providing the basis for an investment decision relating to any of the securities of the Company. The MORs are limited in scope, cover a limited time period, and have been prepared solely for the purpose of complying with the reporting requirements of the Bankruptcy Court. The MORs were not audited or reviewed by independent accountants, were not prepared in accordance with generally accepted accounting principles, are in a format prescribed by applicable bankruptcy rules and guidelines, and are subject to future adjustment and reconciliation. There can be no assurance that, from the perspective of an investor or potential investor in the Company’s securities, the MORs are complete. The MORs also contain information for periods which are shorter or otherwise different from those required in the Company’s reports pursuant to the Securities Exchange Act of 1934, as amended (the “Exchange Act”), and such information might not be indicative of the Company’s financial condition or operating results for the periods that would be reflected in the Company’s financial statements or in its reports pursuant to the Exchange Act. Results and projections set forth in the MORs should not be viewed as indicative of future results.

Cautionary Language Regarding Trading in the Company’s Common Shares

The Company’s shareholders are cautioned that trading in the Company’s common shares of beneficial interest, $.01 par value per share (“common shares”), during the pendency of the Chapter 11 Cases is highly speculative and poses substantial risks. The Company’s common shares are no longer listed on The Nasdaq Stock Market LLC, and trading prices for the Company’s common shares may bear little or no relationship to the actual recovery, if any, by holders thereof in the Chapter 11 Cases. Accordingly, the Company urges extreme caution with respect to existing and future investments in its common shares.

Cautionary Note Concerning Forward Looking Statements

This Current Report on Form 8-K contains statements that constitute forward-looking statements within the meaning of the Private Securities Litigation Reform Act of 1995 and other securities laws. Also, whenever we use words such as “believe”, “expect”, “anticipate”, “intend”, “plan”, “estimate”, “will”, “may” and negatives or derivatives of these or similar expressions, we are making forward-looking statements. These forward-looking statements are based upon our present intent, beliefs or expectations, but forward-looking statements are not guaranteed to occur and may not occur. Actual results may differ materially from those contained in or implied by our forward-looking statements as a result of various factors. These forward-looking statements include, among others, statements regarding the process and potential outcomes of the Chapter 11 Cases. Forward-looking statements are based on the Company’s current expectations, assumptions and estimates and are subject to risk, uncertainties, and other important factors that are difficult to predict and that could cause actual results to differ materially and adversely from those expressed or implied. These risks include, among others, those related to: the Company’s ability to confirm and consummate a plan of reorganization; the duration and outcome of the Chapter 11 Cases; the Company suffering from a long and protracted restructuring; the impact of the Chapter 11 Cases on the Company’s operations, reputation and relationships with tenants, lenders, and vendors; the Company having insufficient liquidity; the availability of financing; the ability to satisfy the conditions precedent to the RSA; the effectiveness of the overall restructuring activities pursuant to the Chapter 11 Cases and any additional strategies that the Company may employ to address its liquidity and capital resources and achieve its stated goals; the potential cancellation of the Company’s equity; and the Company’s historical financial information not being indicative of its future performance as a result of the Chapter 11 Cases.

The information contained in the Company’s filings with the Securities and Exchange Commission (“SEC”), including under the caption “Risk Factors” in the Company’s Annual Report on Form 10-K for the year ended December 31, 2024 and subsequent filings with the SEC, or incorporated herein or therein, identifies other important factors that could cause differences from our forward-looking statements. The Company’s filings with the SEC are available on the SEC’s website at www.sec.gov.

You should not place undue reliance upon the Company’s forward-looking statements.

Except as required by law, we do not intend to update or change any forward-looking statements as a result of new information, future events or otherwise.

Item 9.01. Financial Statements and Exhibits.

(d) Exhibits.

| 99.1 | Office Properties Income Trust Monthly Operating Report for the period of December 1, 2025 through December 31, 2025, as amended.
| 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 current report to be signed on its behalf by the undersigned hereunto duly authorized.

| OFFICE PROPERTIES INCOME TRUST
| By: | /s/ Brian E. Donley
| Name: | Brian E. Donley
| Title: | Chief Financial Officer and Treasurer

Dated: February 10, 2026