The top 3 is then rounded out by GVC Holdings, and Bet365. BizVibe’s largest sports gambling companies list is led by International Game Technology, generating USD 4.69 billion as the largest sports betting company in the world by revenue. The sports betting industry is growing at a stellar rate by 2024, the sports betting industry is expected to reach USD 155.49 billion - growing at a healthy CAGR of 8.83%. As investors and the largest sports gambling companies run up the score, the industry is heading towards a promising future as the US Supreme Court cleared the way for all 50 states offering legal sports betting. The sports betting industry expected to reach USD 8 billion by 2025, led by the innovations of the top 10 largest sports betting companies in the world.