Organization	9 Months Ended
Sep. 30, 2022
Organization Consolidation And Presentation Of Financial Statements [Abstract]
Organization	Note 1 – Organization Runway Growth Finance Corp. (formerly known as Runway Growth Credit Fund Inc.) (the “Company”), is a Maryland corporation that was formed on August 31, 2015. On August 18, 2021, the Company changed its name to “Runway Growth Finance Corp.” from “Runway Growth Credit Fund Inc.” The Company is an externally managed, non-diversified, closed-end investment company that has elected to be regulated as a business development company (“BDC”) under the Investment Company Act of 1940, as amended (the “1940 Act”). In addition, the Company has elected to be treated, has qualified, and intends to continue to qualify annually as a regulated investment company (“RIC”) under Subchapter M of the Internal Revenue Code of 1986, as amended (the “Code”). The Company was formed primarily to lend to, and selectively invest in, high growth-potential companies in technology, life sciences, healthcare information and services, business services, select consumer services and products in other high-growth industries in the United States. The Company’s investment objective is to maximize its total return to its stockholders primarily through current income on its loan portfolio, and secondarily through capital appreciation on its warrants and other equity positions. The Company’s investment activities are managed by its external investment adviser, Runway Growth Capital LLC (“RGC”). The Company’s administrator, Runway Administrator Services LLC (the “Administrator”), is a wholly owned subsidiary of RGC and provides administrative services necessary for the Company to operate. In October 2015, in connection with the Company’s formation, the Company issued and sold 1,667 shares of common stock to R. David Spreng, the President and Chief Executive Officer of the Company and Chairman of the Company’s Board of Directors, for an aggregate purchase price of $25,000. The sale of shares of common stock was approved by the unanimous consent of the Company’s sole director at the time. On December 1, 2017, the Company completed its initial private offering (“Initial Private Offering”), in which the Company issued 18,241,157 shares of its common stock to stockholders for a total purchase price of $275.0 million in reliance on exemptions from the registration requirements of the Securities Act, and other applicable securities laws. Beginning October 15, 2019 and ending September 29, 2021, the Company had completed multiple closings under its second private offering (the “Second Private Offering”) and had accepted aggregate capital commitments of $181.7 million. In connection with the Second Private Offering the Company has issued 9,617,379 shares of its common stock for a total purchase price of $144.3 million. Concurrent with the IPO (as defined below), all undrawn commitments under the Second Private Offering were cancelled. On March 31, 2020 and March 24, 2021, the Company had issued in aggregate 22,564 shares as an additional direct investment by Runway Growth Holdings LLC, an affiliate of RGC, at a per-share price of $15.00 for total proceeds of $0.3 million in a private offering pursuant to an exemption from registration under Regulation D of the Securities Act. On October 25, 2021, the Company closed its initial public offering ("IPO"), issuing 6,850,000 shares of its common stock at a public offering price of $14.60 per share. Net of underwriting fees and offering costs, the Company received net cash proceeds of $93.0 million. The Company’s common stock began trading on the Nasdaq Global Select Market under the symbol “RWAY” on October 21, 2021. Since inception, the Company has issued an additional 6,647,847 shares as part of the dividend reinvestment plan. For more information, see “Note 6 – Net Assets.”

Organization

9 Months Ended

Sep. 30, 2022

Organization Consolidation And Presentation Of Financial Statements [Abstract]

Note 1 – Organization

Runway Growth Finance Corp. (formerly known as Runway Growth Credit Fund Inc.) (the “Company”), is a Maryland corporation that was formed on August 31, 2015. On August 18, 2021, the Company changed its name to “Runway Growth Finance Corp.” from “Runway Growth Credit Fund Inc.” The Company is an externally managed, non-diversified, closed-end investment company that has elected to be regulated as a business development company (“BDC”) under the Investment Company Act of 1940, as amended (the “1940 Act”). In addition, the Company has elected to be treated, has qualified, and intends to continue to qualify annually as a regulated investment company (“RIC”) under Subchapter M of the Internal Revenue Code of 1986, as amended (the “Code”).

The Company was formed primarily to lend to, and selectively invest in, high growth-potential companies in technology, life sciences, healthcare information and services, business services, select consumer services and products in other high-growth industries in the United States. The Company’s investment objective is to maximize its total return to its stockholders primarily through current income on its loan portfolio, and secondarily through capital appreciation on its warrants and other equity positions. The Company’s investment activities are managed by its external investment adviser, Runway Growth Capital LLC (“RGC”). The Company’s administrator, Runway Administrator Services LLC (the “Administrator”), is a wholly owned subsidiary of RGC and provides administrative services necessary for the Company to operate.

In October 2015, in connection with the Company’s formation, the Company issued and sold 1,667 shares of common stock to R. David Spreng, the President and Chief Executive Officer of the Company and Chairman of the Company’s Board of Directors, for an aggregate purchase price of $25,000. The sale of shares of common stock was approved by the unanimous consent of the Company’s sole director at the time. On December 1, 2017, the Company completed its initial private offering (“Initial Private Offering”), in which the Company issued 18,241,157 shares of its common stock to stockholders for a total purchase price of $275.0 million in reliance on exemptions from the registration requirements of the Securities Act, and other applicable securities laws.

Beginning October 15, 2019 and ending September 29, 2021, the Company had completed multiple closings under its second private offering (the “Second Private Offering”) and had accepted aggregate capital commitments of $181.7 million. In connection with the Second Private Offering the Company has issued 9,617,379 shares of its common stock for a total purchase price of $144.3 million. Concurrent with the IPO (as defined below), all undrawn commitments under the Second Private Offering were cancelled.

On March 31, 2020 and March 24, 2021, the Company had issued in aggregate 22,564 shares as an additional direct investment by Runway Growth Holdings LLC, an affiliate of RGC, at a per-share price of $15.00 for total proceeds of $0.3 million in a private offering pursuant to an exemption from registration under Regulation D of the Securities Act.

On October 25, 2021, the Company closed its initial public offering ("IPO"), issuing 6,850,000 shares of its common stock at a public offering price of $14.60 per share. Net of underwriting fees and offering costs, the Company received net cash proceeds of $93.0 million. The Company’s common stock began trading on the Nasdaq Global Select Market under the symbol “RWAY” on October 21, 2021.

Since inception, the Company has issued an additional 6,647,847 shares as part of the dividend reinvestment plan. For more information, see “Note 6 – Net Assets.”