The Sheffield-based developer, which makes games such as Forza Motorsport 7 and HITMAN Episode 5, said the placing of ordinary shares has raised about 38.5 million pounds, while a vendor placing has raised about 39.7 million pounds for selling shareholders.
The company's management and funds managed by private equity Perwyn LLP will retain a 43 percent stake.
Sumo Digital, which develops games for Sony (>> Sony Corp) and Microsoft (>> Microsoft Corporation), was founded in 2003 and is one the largest independent games developers in the UK.
The proceeds of the offering will be used to cut debt and as additional working capital, the company said.
Zeus Capital was the sole bookrunner of the offering.
(Reporting by Rahul B in Bengaluru; Editing by Amrutha Gayathri)