SG Digital saw more than 37.4 million bets placed through its OpenBet product suite on the Aintree Grand National Festival.
A total of 14.5 million bets were placed on the Grand National race alone.
Bets per minute increased by 25% from 2018, reaching a high of 25,000.
The recent Cheltenham Festival saw SG Digital’s sportsbook customers process over 48.2 million bets more than the four-day event, reaching a peak of 26,000 wagers per minute.
SG Digital’s customers include several major UK operators, such as William Hill, Sky Bet, Paddy Power Betfair and Ladbrokes Coral.
Keith O’Loughlin, SVP Sportsbook of SG Digital, said: "The Grand National consistently showcases the power and scale of the betting industry, as evidenced by the top-notch performance of our teams and technology.
"This is monumental scale in comparison to peaks seen by online retailers through key shopping events such as Black Friday and Cyber Monday.
"Our transactions outpaced the performance by the world’s leading online retailer on Cyber Monday, as reported by Hitwise, by more than twice - a testament to our solid technology platform."