0001653384 2026-05-27 2026-05-27 0001653384 rway:CommonStockParValue0.01PerShareMember 2026-05-27 2026-05-27 0001653384 rway:Sec7.50NotesDue2027Member 2026-05-27 2026-05-27 0001653384 rway:Notes7.25Due2031Member 2026-05-27 2026-05-27 0001653384 rway:Notes9.00Due2027Member 2026-05-27 2026-05-27 false 0001653384 8-K 2026-05-27 Runway Growth Finance Corp. MD 814-01180 47-5049745 205 N. Michigan Ave. Suite 4200 Chicago IL 60601 312 698-6902 false false false false Common Stock, par value $0.01 per share RWAY NASDAQ 7.50% Notes due 2027 RWAYL NASDAQ 7.25% Notes due 2031 RWAYI NASDAQ 9.00% Notes due 2027 SWKHL NASDAQ true false