TPG Mortgage Investment Trust, Inc.

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 10-K

(Mark One)

For the fiscal year ended December 31, 2025

OR

For the transition period from to

Commission file number 001-35151

TPG MORTGAGE INVESTMENT TRUST, INC.

(Exact name of registrant as specified in its charter)

(212)692-2000

(Registrant’s Telephone Number, Including Area Code)

Securities registered pursuant to Section 12(b) of the Securities Exchange Act of 1934:

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

None

Indicate by check mark if the registrant is a well-known seasoned issuer, as defined in Rule 405 of the Securities Act. Yes☐ No ☒

Indicate by check mark if the registrant is not required to file reports pursuant to Section 13 or Section 15(d) of the Act. Yes☐ No ☒

Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days. Yes ☒ No☐

Indicate by check mark whether the registrant has submitted electronically every Interactive Data File required to be submitted pursuant to Rule 405 and Regulation S-T (§232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit such files). Yes ☒ No☐

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, a smaller reporting company, or an emerging growth company. See the definitions of "large accelerated filer," "accelerated filer," "smaller reporting company" and "emerging growth company" in Rule 12b-2 of the Exchange Act.

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.¨

Indicate by check mark whether the registrant has filed a report on and attestation to its management’s assessment of the effectiveness of its internal control over financial reporting under Section 404(b) of the Sarbanes-Oxley Act (15 U.S.C. 7262(b)) by the registered public accounting firm that prepared or issued its audit report. Yes☒ No☐

If securities are registered pursuant to Section 12(b) of the Act, indicate by check mark whether the financial statements of the registrant included in the filing reflect the correction of an error to previously issued financial statements.☐

Indicate by check mark whether any of those error corrections are restatements that required a recovery analysis of incentive-based compensation received by any of the registrant’s executive officers during the relevant recovery period pursuant to §240.10D-1(b). ☐

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Act). Yes☐ No☒

The aggregate market value of the registrant’s voting common stock held by non-affiliates as of June 30, 2025 was $214,436,323.

As of February 17, 2026, there were 31,735,457 shares of common stock outstanding.

DOCUMENTS INCORPORATED BY REFERENCE

Portions of the registrant’s definitive proxy statement relating to its 2026 annual meeting of stockholders, to be filed with the U.S. Securities and Exchange Commission within 120 days after the end of the registrant’s fiscal year, are incorporated by reference into Part III of this Annual Report on Form 10-K where indicated.

TPG MORTGAGE INVESTMENT TRUST, INC.

TABLE OF CONTENTS

Forward-Looking Statements

We make forward-looking statements within the meaning of Section 27A of the Securities Act of 1933, as amended (the "Securities Act"), and Section 21E of the Securities Exchange Act of 1934, as amended (the "Exchange Act"), in this report that are subject to substantial known and unknown risks and uncertainties. These forward-looking statements include information about possible or assumed future results of our business, financial condition, liquidity, returns, results of operations, plans, yields, objectives, the composition of our portfolio, actions by governmental entities, including the Federal Reserve, and the potential effects of actual and proposed legislation on us, and our views on certain macroeconomic trends. When we use the words "believe," "expect," "anticipate," "estimate," "plan," "continue," "intend," "should," "may" or similar expressions, we intend to identify forward-looking statements.

These forward-looking statements are based upon information presently available to our management and are inherently subjective, uncertain and subject to change. There can be no assurance that actual results will not differ materially from our expectations. Some, but not all, of the factors that might cause such a difference include, without limitation:

•the persistence of labor shortages, supply chain imbalances, changes in trade policies and tariffs, the Middle Eastern conflict, the Russia-Ukraine conflict, inflation, and the potential for an economic recession and market disruptions;

•changes in our business and investment strategy;

•our ability to predict and control costs;

•changes in interest rates and the fair value of our assets, including negative changes resulting in margin calls relating to the financing of our assets;

•changes in the yield curve;

•changes in prepayment rates on the loans we own or that underlie our investment securities;

•regulatory and structural changes in the residential loan market and its impact on non-agency mortgage markets;

•increased rates of default or delinquencies and/or decreased recovery rates on our assets;

•our ability to obtain and maintain financing arrangements on terms favorable to us or at all;

•our ability to enter into, or refinance, securitization transactions on the terms and pace anticipated or at all;

•the degree to which our hedging strategies may or may not protect us from interest rate and credit risk volatility;

•changes in general economic conditions, in our industry and in the finance and real estate markets, including the impact on the value of our assets;

•conditions in the market for residential mortgage investments and Agency RMBS;

•conditions in the market for commercial investments, including the Company's ability to successfully realize the commercial investments acquired from Western Asset Mortgage Capital Corporation ("WMC") within the timeframe anticipated or at all;

•legislative and regulatory actions by the U.S. Congress, U.S. Department of the Treasury, the Federal Reserve and other agencies and instrumentalities;

•our ability to make distributions to our stockholders in the future;

•our ability to maintain our qualification as a REIT for federal tax purposes; and

•our ability to qualify for an exemption from registration under the Investment Company Act of 1940, as amended (the "Investment Company Act").

We caution investors not to rely unduly on any forward-looking statements, which speak only as of the date made, and urge you to carefully consider the risks noted above in this Annual Report on Form 10-K for the year ended December 31, 2025 and any subsequent filings. New risks and uncertainties arise from time to time, and it is impossible for us to predict those events or how they may affect us. Except as required by law, we are not obligated to, and do not intend to, update or revise any forward-looking statements, whether as a result of new information, future events or otherwise. All forward-looking statements that we make, or that are attributable to us, are expressly qualified by this cautionary notice.