Flutter Entertainment PLC (LSE:FLTR) reported a 24.6% increase in revenue to $11,790 million for the fiscal year ended December 31, 2023. Adjusted EBITDA grew by 45.4% to $1,874 million, with a margin expansion of 230 basis points to 15.9%. U.S. Market: FanDuel solidified its position as America's number one online sportsbook.