v3.26.1
N-2 - $ / shares
 6 Months Ended
Jun. 30, 2026
Dec. 31, 2025
 [1]
Jun. 30, 2025
Dec. 31, 2024
 [1]
Cover [Abstract]        
Entity Central Index Key 0001653384      
Amendment Flag false      
Securities Act File Number 814-01180      
Document Type 10-Q      
Entity Registrant Name Runway Growth Finance Corp.      
Entity Address, Address Line One 205 N. Michigan Ave.      
Entity Address, Address Line Two Suite 4200      
Entity Address, City or Town Chicago      
Entity Address, State or Province IL      
Entity Address, Postal Zip Code 60601      
City Area Code 312      
Local Phone Number 698-6902      
Entity Emerging Growth Company true      
Entity Ex Transition Period false      
General Description of Registrant [Abstract]        
Investment Objectives and Practices [Text Block]

Our investment objective is to maximize our total return to our stockholders primarily through current income on our loan portfolio, and secondarily through capital gains on our warrants and other equity positions. We intend to achieve our investment objective by investing in high growth-potential, private companies. We typically invest in senior secured loans that generally fall into two strategies: Sponsored Growth Lending and Non-Sponsored Growth Lending. We generally receive warrants and/or other equity from our investments. We expect our global loan originations will generally range between $10-$150 million, with our allocation being in the range of $20-$45 million.

 

We generate revenue in the form of interest on the debt securities that we hold and distributions and capital gains on other interests that we acquire in our portfolio companies. We expect that the debt we invest in will generally have stated terms of 36 to 60 months. Interest on debt securities is generally payable monthly, primarily based on a floating rate index, and subject to certain floors determined by market rates at the time the investment is made. In some cases, some of our investments may provide for deferred interest payments or PIK interest. The principal amount of the debt securities and any accrued but unpaid interest will become due at the maturity date. Any original issue discount ("OID") or market discount or premium will be capitalized, and we will accrete or amortize such amounts as interest income. We record prepayment fees on debt investments as fee income. Dividend income, if any, will be recognized on an accrual basis to the extent that we expect to collect such amounts.

      
Risk Factors [Table Text Block]

Item 1A. Risk Factors.

You should carefully consider the risks contained in this quarterly report on Form 10-Q, including our interim consolidated financial statements and the related notes thereto, before making a decision to purchase our securities.

In addition to the other information set forth in this report, you should carefully consider the risk factors discussed in "Risk Factors" in Part I, Item 1A of our annual report on Form 10-K, filed with the SEC on March 12, 2026.

The risks and uncertainties described in this report and our annual report on Form 10-K are not the only ones we may face. Additional risks and uncertainties not currently known to us or that we currently deem to be immaterial also may materially adversely affect our business, financial condition and/or operating results. If any of the risks listed in this report and our annual report on Form 10-K actually occur, our business, financial condition or results of operations could be materially adversely affected. If that happens, you may lose all or part of your investment.

Risks Related to Our Business and Structure

We are dependent upon RGC's senior management personnel for our future success.

We depend on the experience, diligence, skill and investment acumen of RGC's senior officers and other investment professionals, including members of its investment committee, that it currently retains or may subsequently retain that identify, evaluate, negotiate, structure, close, monitor and manage our investments. Our future success will depend to a significant extent on the continued service of RGC’s senior management. We cannot assure you that unforeseen business, medical, personal or other circumstances would not lead any such individual to terminate his or her relationship with us. The departure of any of the members of RGC’s senior management could have a material adverse effect on our ability to achieve our investment objective, as well as on our financial condition, business and results of operations. In addition, we can offer no assurance that RGC will continue indefinitely as our investment adviser.

The members of RGC’s senior management are and may in the future become affiliated with entities engaged in business activities similar to those intended to be conducted by us and may have conflicts of interest in allocating their time. RGC may also manage and sub-advise private investment funds and accounts, and may manage other such funds and accounts in the future, which have investment mandates that are similar, in whole or in part, with ours. Accordingly, RGC’s senior management may have obligations to investors in those entities, the fulfillment of which might not be in the best interests of us or our stockholders. For example, RGC’s senior management may face conflicts of interest in the allocation of investment opportunities to us and such other existing and future funds and accounts.

      
NAV Per Share $ 11.91 $ 13.42 $ 13.66 $ 13.79
[1] All per share activity, excluding dividends, is calculated based on the weighted-average shares outstanding for the relevant period.