NYX Gaming Group handled record numbers of boxing bets and stakes via its OpenBet platform leading up to and during the Mayweather-McGregor fight on 26 August.
The record yielded an increase of 530 percent in total stakes and 375 percent in total number of bets over the previous record betting fight between Mayweather and Manny Pacquiao in 2015.
Eighty-five percent of bets placed were in favour of Irish underdog McGregor, while the total stakes were £1m higher for Mayweather.
The average bet piled on by Conor McGregor supporters was £20 while the smart money was placed on Mayweather with an average bet six times higher at £120.
Keith O’Loughlin, Executive Vice President OpenBet said: “OpenBet proved again that the platform we offer to operators can scale to cover very significant spikes of business.
“The resilience and scalability of OpenBet allows us to smash previous records with confidence and we continuously offer our customers a great experience 24/7 when it matters most.
“OpenBet, our customers, punters, Mayweather and McGregor all came out winners on one of the biggest fights in history – that’s pretty unique!”
The bout was one of the most highly-viewed fights ever with PPV and TV revenue expected to have broken the $400m barrier.