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):

June 16, 2023 (June 15, 2023)

RUNWAY GROWTH FINANCE CORP.

(Exact name of registrant as specified in its charter)

205 N. Michigan Ave., Suite 4200

Chicago, Illinois 60601

(Address of principal executive offices and zip code)

Registrant’s telephone number, including area code: (312) 281-6270

Check the appropriate box below if the Form 8-K 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:

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 or Rule 12b-2 of the Securities Exchange Act of 1934. Emerging growth company x

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 5.07. Submission of Matters to a Vote of Security Holders

On June 15, 2023, Runway Growth Finance Corp. (the “Company”) held its 2023 Annual Meeting of Stockholders (the “Annual Meeting”). The Company submitted two (2) matters to the vote of its stockholders, each of which is described in detail in the Company’s definitive proxy statement (the “Proxy Statement”) for the Annual Meeting filed with the Securities and Exchange Commission on April 28, 2023.

As of the close of business on April 25, 2023, the record date for the Annual Meeting, there were 40,509,269 shares of the Company’s common stock outstanding and entitled to vote at the Annual Meeting. A summary of the matters voted upon by the Company’s stockholders at the Annual Meeting is set forth below.

Proposal 1: Election of Directors

The Company’s stockholders re-elected two directors to the Board of Directors, including Gary Kovacs to serve until the 2026 Annual Meeting of Stockholders and until his successor is duly elected and qualified, and John F. Engel to serve for the remainder of the Class II director term until the 2024 Annual Meeting of Stockholders and until his successor is duly elected and qualified. The following votes were taken in connection with this proposal:

Proposal 2: Ratification of the selection of RSM US LLP to serve as the Company’s independent registered public accounting firm for the fiscal year ending December 31, 2023

The Company’s stockholder ratified the selection of RSM US LLP to serve as the Company’s independent registered public accounting firm for the fiscal year ending December 31, 2023. The following votes were taken in connection with this proposal:

Item 9.01. Financial Statements and Exhibits

(d) Exhibits:

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.