By revenue - operators
Flutter Entertainment (FanDuel parent, plus PokerStars, Sky Bet, Sportsbet) leads global operator revenue by margin in 2025-2026 results, driven by US sports-betting market share. Entain (Ladbrokes, Coral, BetMGM JV with MGM Resorts) is the second-tier global operator. DraftKings is the largest US-only operator; Caesars Digital, BetMGM, and Penn Entertainment (ESPN BET) round out the US top-five. In continental Europe, bet365 (private), Kindred (acquired by FDJ Group), Betsson, and LeoVegas (MGM Resorts subsidiary) operate at scale. Stake.com is the largest crypto-native operator globally. Each operator's quarterly revenue is published on its per-ticker page on /markets.
By revenue - suppliers and platforms
Evolution leads global live-casino content; Pragmatic Play parent and Light & Wonder are the largest online-slot studios. Aristocrat Leisure straddles land-based and digital. Genius Sports and Sportradar are the two dominant sports-data and integrity-monitoring suppliers; either is the data backbone behind most large sportsbooks. Kambi runs the leading B2B sportsbook platform for operators that do not run their own trading. IGT is the US lottery and gaming-tech behemoth with material digital operations.
By market cap
The iGT 25 Index tracks the 25 largest publicly-traded iGaming companies by market capitalisation in real time. The float-adjusted weighting captures both US-listed and LSE-listed constituents; the index is rebalanced quarterly. Year-to-date returns and the constituent table are at /markets.
Private companies and recent IPOs
bet365 remains private and is the largest non-listed European operator. Stake.com is private. Polymarket and Kalshi are private US prediction-markets operators. Recent listings of note: Genius Sports (NYSE 2021 SPAC), DraftKings (NASDAQ 2020 SPAC), Sportradar (NASDAQ 2021 IPO). The iGaming IPO pipeline is tracked on the Markets section.