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 27, 2026

Runway Growth Finance Corp.

(Exact name of Registrant as Specified in Its Charter)

Maryland		814-01180		47-5049745
(State or Other Jurisdiction of Incorporation)		(Commission File Number)		(IRS Employer Identification No.)

205 N. Michigan Ave. Suite 4200
Chicago, Illinois		60601
(Address of Principal Executive Offices)		(Zip Code)

Registrant’s Telephone Number, Including Area Code: (312) 698-6902

Not Applicable

(Former Name or Former Address, if Changed Since Last Report)

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 Stock, par value $0.01 per share	RWAY	Nasdaq Global Select Market
7.50% Notes due 2027	RWAYL	Nasdaq Global Select Market
8.00% Notes due 2027	RWAYZ	Nasdaq Global Select Market

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 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 1.01. Entry into a Material Definitive Agreement

Underwriting Agreement

On January 27, 2026, Runway Growth Finance Corp. (the “Company”) entered into an underwriting agreement (the “Underwriting Agreement”) by and among the Company, Runway Growth Capital LLC and Oppenheimer & Co. Inc., as representative of each of the several underwriters named in Schedule I thereto, in connection with the issuance and sale of $100.0 million aggregate principal amount of the Company’s 7.25% Notes due 2031 (the “Offering”). The closing of the Offering is expected to occur on February 3, 2026, subject to customary closing conditions. The Company also granted the underwriters a 30-day option to purchase up to an additional $15.0 million in aggregate principal amount of the Notes to cover overallotments, if any.

The Offering was made pursuant to the Company’s effective shelf registration statement on Form N-2 (Registration No. 333-284781) previously filed with the Securities and Exchange Commission (the “SEC”), as supplemented by a preliminary prospectus supplement dated January 26, 2026 and a final prospectus supplement dated January 27, 2026. This Current Report on Form 8-K shall not constitute an offer to sell or a solicitation of an offer to buy any securities, nor shall there be any sale of these securities in any state or jurisdiction in which such an offer, solicitation or sale would be unlawful prior to registration or qualification under the securities laws of any such state or other jurisdiction.

The foregoing description of the Underwriting Agreement does not purport to be complete and is qualified in its entirety by reference to the full text of the Underwriting Agreement, which is filed as Exhibit 1.1 to this Current Report on Form 8-K and incorporated by reference herein.

Item 2.03 Creation of a Direct Financial Obligation or an Obligation under an Off-Balance Sheet Arrangement of a Registrant.

The information set forth under Item 1.01 is hereby incorporated by reference into this Item 2.03.

Item 9.01. Financial Statements and Exhibits

(d) Exhibits:

Exhibit Number		Description

1.1		Underwriting Agreement, dated as of January 27, 2026, by and among Runway Growth Finance Corp., Runway Growth Capital LLC and Oppenheimer & Co. Inc., as Representative of the several Underwriters named in Schedule I thereto.

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.

Date: January 29, 2026	RUNWAY GROWTH FINANCE CORP.

	By:	/s/ Thomas B. Raterman
		Thomas B. Raterman
		Chief Operating Officer, Chief Financial Officer, Treasurer and Secretary

Runway Growth Finance Corp. 8-K