Flutter and Entain Shares Surge as US Senators Introduce Bill Targeting Prediction Markets on Sports and Casino Bets

Shares of UK-listed gambling heavyweights Flutter Entertainment and Entain rocketed upward on March 24, 2026, after bipartisan US senators unveiled legislation aimed squarely at prediction market platforms; the bill seeks to prohibit these venues from offering contracts tied to sports betting outcomes and casino games, a move that lit a fire under traditional sportsbook operators. Flutter, the parent company of FanDuel, climbed 7.6% in early US trading, while Entain, which oversees Ladbrokes and holds a stake in BetMGM, posted a 6.4% gain, reflecting investor bets that the proposed law could steer bettors back toward established sportsbooks regulated under state gaming authorities.

What's interesting here is how quickly markets reacted to the bill's introduction, since prediction platforms like Kalshi and Polymarket operate under the oversight of the Commodity Futures Trading Commission (CFTC), positioning them as direct challengers to the sports betting giants that have poured billions into US expansion since the 2018 Supreme Court decision overturning PASPA. Traditional operators have long navigated a patchwork of state-by-state licensing, whereas CFTC-regulated markets tout broader accessibility, often blurring lines between financial derivatives and pure gambling propositions.

Senators from both sides of the aisle tabled the measure, which zeroes in on event contracts linked to sports events and casino results, arguing that such offerings encroach on the domain of licensed sportsbooks and could undermine consumer protections baked into state gambling frameworks. The bill, if passed, would amend CFTC rules to explicitly bar these platforms from hosting contracts on "gaming" activities, leaving prediction markets to focus on elections, weather, or economic indicators instead; proponents highlight how sports betting has become a regulated multibillion-dollar industry across more than 30 US states, complete with age verification, responsible gaming tools, and tax revenues funneled to education and infrastructure.

And while the legislation remains in early stages, its bipartisan backing signals serious momentum, especially as prediction markets have exploded in popularity post-2024 elections, drawing retail traders with low-stakes contracts that mimic binary options on game scores or player stats. Observers note that platforms like Polymarket saw trading volumes spike into the hundreds of millions during major NFL and NBA playoffs, siphoning liquidity from apps like FanDuel and DraftKings where users place straightforward wagers.

This legislative push arrives amid a wave of enforcement actions against prediction markets, including Arizona's high-profile criminal case against Kalshi, where prosecutors accused the platform of illegally offering sports-related contracts without proper state gaming approval; that case, filed in early 2026, underscores tensions between federal commodity regulators and state attorneys general who view these operations as unlicensed gambling rings. Adding fuel, 11 US states have issued cease-and-desist orders targeting similar platforms, citing violations of local betting laws that mandate hefty licensing fees and compliance with anti-money laundering protocols.

Take Nevada, for instance, where the Nevada Gaming Control Board has repeatedly warned against unregulated entrants, or New Jersey, home to some of the nation's busiest sportsbooks, which joined the chorus with formal notices; these crackdowns reveal a coordinated effort to protect the integrity of legalized sports wagering, now generating over $10 billion in annual handle across participating states. Experts who've tracked the sector point out that traditional sportsbooks contribute millions in taxes—Flutter alone remitted over $1.2 billion in the US for 2025—while prediction markets, structured as futures contracts, skirt similar obligations under CFTC jurisdiction.

Flutter Entertainment, headquartered in Dublin but listed on the London Stock Exchange, dominates the US market through FanDuel, which commands about 40% share of online sports betting handle according to recent Eilers & Krejcik Gaming reports; the company has invested heavily in Super Bowl ads, partnerships with NFL teams, and tech upgrades for same-game parlays, turning FanDuel into a household name since acquiring it in 2018. Entain, meanwhile, blends UK high-street roots with US ambitions via its 50% ownership in BetMGM alongside MGM Resorts, a joint venture that's captured 15-20% market share by leveraging casino integrations and celebrity endorsements from figures like Jamie Foxx.

Both firms have weathered intense competition, regulatory hurdles like New York's 51% tax on gross gaming revenue, and shifts toward player-friendly features such as deposit limits and self-exclusion tools; yet their stocks had dipped earlier in March 2026 amid broader market jitters and concerns over prediction markets nibbling at edges. Turns out, this bill flipped the script, with analysts at firms like Barclays upgrading price targets post-announcement, projecting that curbing CFTC platforms could funnel an extra $500 million in annual handle to licensed operators.

In early US trading on March 24, Flutter's ADR touched a high of $260 per share, up from a prior close around $241, while Entain's shares pushed toward £12, marking their strongest single-day gain since Q4 2025 earnings; volume surged fourfold the average, signaling heavy institutional buying from funds like BlackRock, which holds significant stakes in both. Data from Bloomberg terminals shows the moves outpaced the FTSE 100 and Nasdaq, underscoring sector-specific optimism tied to the bill's potential to level the playing field.

But here's the thing: this isn't isolated, as similar sentiments rippled through peers like DraftKings, up 4.2%, and Rush Street Interactive, gaining 5.1%, hinting at a broader rally for sportsbook pure-plays. Those who've studied gambling M&A patterns recall how Flutter's $20 billion Paddy Power Betfair merger in 2016 positioned it for US dominance, and now, with prediction threats potentially neutered, investors eye accelerated growth toward the 2026 NFL season opener.

Prediction markets differ from traditional sportsbooks in key ways—users buy "yes" or "no" shares on outcomes, settling at $1 per correct prediction, which appeals to quants and hedgers but confuses casual fans expecting point spreads or moneylines; Kalshi, for example, launched sports contracts in late 2025 despite CFTC approvals limited to non-gaming events, prompting lawsuits and now this federal response. Studies from the American Gaming Association indicate that 70% of prediction market sports volume overlaps with sportsbook activity, creating direct cannibalization without the same safeguards against problem gambling.

People often find it noteworthy that while sportsbooks cap bets and verify identities per state rules, prediction platforms leverage crypto wallets for anonymity, raising red flags for match-fixing risks in an era where NBA and MLB scandals grab headlines. One case that experts cite involves a 2025 Polymarket contract on an EPL match that allegedly influenced line movements at major books, though investigations cleared direct causation; still, the episode amplified calls for clearer boundaries.

As the bill winds through committees—likely landing before the Senate Agriculture panel overseeing CFTC—lobbyists from the Nevada Gaming Control Board and allied states gear up to testify, emphasizing how legalized betting has created 500,000 jobs and $15 billion in economic impact since 2018. Prediction advocates, however, counter that their models enhance price discovery for events, much like stock options, and vow legal challenges if the ban sticks.

Yet with Arizona's Kalshi trial set for summer 2026 and more states probing volumes, the writing's on the wall for platforms skirting gaming licenses; traditional operators like Flutter and Entain, already compliant across 25+ jurisdictions, stand poised to consolidate gains, perhaps through acquisitions or expanded casino crossovers in places like Pennsylvania and Michigan.

The surge in Flutter and Entain shares captures a pivotal moment in March 2026, where US senators' anti-prediction market bill spotlights the tug-of-war between innovative platforms and battle-tested sportsbooks; with regulatory heat from Arizona's case, multi-state orders, and now federal action, investors clearly bet on traditional giants reclaiming turf. Data underscores the stakes—US sports betting hit $150 billion in handle for 2025—while the outcome of this legislation could reshape competition for years, bolstering state-regulated models that prioritize transparency and revenue sharing. Observers keep watch as hearings loom, knowing the ball's now in Congress's court.