FORM 10-Q QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934For the quarterly period ended March 31, 2026ORTRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934Commission File Number: 814-00646 MIDCAP FINANCIAL INVESTMENT CORPORATION (Exact name of Registrant as specified in its charter) 52-2439556 Maryland 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 thepreceding 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 past90 days.YesNo Indicate by check mark whether the Registrant has submitted electronically and posted on its corporate Web site, if any, every Interactive Data File required to besubmitted and posted pursuant to Rule 405 of Regulation S-T (§232.405 of this chapter) during the preceding 12 months (or for such shorter period that theregistrant was required to submit and post such files).YesNo Indicate by check mark whether the Registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, or a smaller reporting company or an emerginggrowth company. See the definitions of “large accelerated filer,” “accelerated filer”, “smaller reporting company” and “emerging growth company” in Rule 12b-2of the Exchange Act. Large accelerated filerAccelerated filerNon-accelerated filerSmaller reporting companyEmerging growth company(Do not check if a smaller reporting 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 Indicate by check mark whether the Registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act).YesNo The number of shares of the Registrant’s common stock, $0.001 par value per share, outstanding as of May 5, 2026 was 82,372,628. MIDCAP FINANCIAL INVESTMENT CORPORATION Table of Contents PART I. FINANCIAL INFORMATION Item 1.Consolidated Financial Statements1Consolidated Statements of Assets and Liabilities as ofMarch 31, 2026 (Unaudited) and December 31, 20251Consolidated Statements of Operations for thethree months ended March 31, 2026 and March 31, 2025(Unaudited)2Consolidated Statements of Changes in Net Assets for thethree months ended March 31, 2026 and March 31, 2025 (Unaudited)3Consolidated Statements of Cash Flows for thethree months ended March 31, 2026 and March 31, 2025(Unaudited)4Consolidated Schedule of Investments as of March 31, 2026 (Unaudited)5Consolidated Schedule of Investments as of December 31, 202556Notes to Consolidated Financial Statements108Report of Independent Registered Public Accounting Firm145Item 2.Management’s Discussion and Analysis of Financial Condition and Results of Operations146Item 3.Quantitative and Qualitative Disclosures About Market Risk159Item 4.Controls and Procedures161 PART II. OTHER INFORMATION Item 1.Legal Proceedings162Item 1A.Risk Factors162Item 2.Unregistered Sales of Equity Securities and Use of Proceeds163Item 3.Defaults Upon Senior Securities166Item 4.Mine Safety Disclosures166Item 5.Other Information166Item 6.Exhibits167Signatures168 PART I. FINANCIAL INFORMATION In this report, the terms the “Company,” “we,” “us,” and “our” refer to MidCap Financial Investment Corporation unless thecontext specifically states otherwise. MIDCAP FINANCIAL INVESTMENT CORPORATIONCONSOLIDATED STATEMENTS OF ASSETS AND LIABILITIES(In thousands, except share and per share data) MIDCAP FINANCIAL INVESTMENT CORPORATIONCONSOLIDATED STATEMENTS OF OPERATIONS (Unaudited)(In thousands, except per share data) MIDCAP FINANCIAL INVESTMENT CORPORATIONCONSOLIDATED STATEMENTS OF CHANGES IN NET ASSETS (Unaudited)(In thousands, except share data) MIDCAP FINANCIAL INVESTMENT CORPORATIONCONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited)(In thousands) MIDCAP FINANCIAL INVESTMENT CORPORATIONCONSOLIDATED SCHEDULE OF INVESTMENTS (Unaudited)March 31, 2026(In thousands, except share data) MIDCAP FINANCIAL INVESTMENT CORPORATIONCONSOLIDATED SCHEDULE OF INVESTMENTS (Unaudited)March 31, 2026(In thousands, except share data) MIDCAP FINANCIAL INVESTMENT CORPORATIONCONSOLIDATED SCHEDULE OF INVESTMENTS (Unaudited)March 31, 2026(In thousands, except share data) MIDCAP FINANCIAL INVESTMENT CORPORATIONCONSOLIDATED SCHEDULE OF INVESTMENTS (Unaudited)March 31, 2026(In thousands, except share data) MIDCAP FINANCIAL INVESTMENT CORPORATIONCONSOLIDATED SCHEDULE OF INVESTMENTS (Unaudited)March 31, 2026(In thousands, except share data) MIDCAP FINANCIAL INVESTMENT CORPORATIONCONSOLIDATED SCHEDULE OF INVESTMENTS (Unaudited)March 31, 2026(In thousands, except share data) MIDCAP FINANCIAL INVESTMENT CORPORATIONCONSOLIDATED SCHEDULE OF INVESTMENTS (Unaudited)March 31, 2026(In thousands, except share data) MIDCAP FINANCIAL INV