FanDuel’s position at the top of the U.S. online casino market is looking increasingly secure, according to Q2 2025 iCasino gross gaming revenue (GGR) market share data compiled by Alfonso Straffon on X.
The Flutter-owned operator captured 28.5% of the market in June 2025, a figure it has hovered near for much of the past year. That’s a remarkable climb from its sub-20% share in early 2022, and it cements the lead FanDuel Casino first seized from BetMGM in mid-2023.
FanDuel’s rise has been steady rather than meteoric, fueled by its ability to cross-sell existing sportsbook customers, expand its proprietary game portfolio, and invest in casino-specific marketing. Since overtaking BetMGM two years ago, FanDuel has kept the gap wide, showing no signs of giving up the crown.
DraftKings Holds Firm at No. 2
DraftKings Casino remains the market’s model of consistency. After some early swings in 2021, the Boston-based operator has largely settled into the low- to mid-20% range. Its June 2025 share came in at 23.8%, almost identical to its level in early 2024.
While DraftKings has not seen the same growth trajectory as FanDuel, its stability has kept it firmly in the second slot for the past two years. That consistency could prove valuable in a market where large shifts tend to come at a rival’s expense rather than from overall expansion.
BetMGM’s Slide Continues
BetMGM’s market share has steadily eroded from its 2021 peak near 30%. Once the undisputed leader, the joint venture between MGM Resorts and Entain now sits at 19.1%, its lowest point in the four-year data set.
The decline has been gradual but persistent. BetMGM held off DraftKings for second place until mid-2023, when FanDuel overtook it for good. Since then, it has trailed both rivals by a widening margin, even as it continues to lead in certain individual state markets like Michigan and West Virginia.
The challenge for BetMGM is twofold: maintaining a competitive product against the deep pockets and brand recognition of FanDuel and DraftKings, and finding new ways to grow in a relatively mature iCasino landscape.
All of that said, near 20% market share of a robust online casino industry is nothing to scoff at. As long as BetMGM holds steady, it’s still in a pretty desirable spot.
The Rest of the Field
Outside the top three, Rush Street Interactive (BetRivers) holds 7.3% of the market, followed by Caesars at 6.5% and Penn Entertainment’s Hollywood Casino brand at 3.1%. Hard Rock, Fanatics, and bet365 each claim 2.5% or less. These smaller operators have largely maintained stable shares, with incremental gains or losses over time.
While their individual numbers are modest compared to the leaders, shifts among this second tier could impact partnerships, state-by-state competition, and potential merger activity in the years ahead.
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