Casino News Roundup: MGM's Diller Deal & Polymarket Insider Scandal

Welcome to the Casino Daily News Roundup - your briefing on the latest news from the global casino industry. We bring you the biggest stories from across the sector, covering everything from major business deals and revenue figures to new openings and regulatory developments.

Barry Diller & MGM Resorts Seal Landmark Governance Agreement

One of the most significant corporate governance developments in the casino industry this week has been the formalisation of a carefully structured voting agreement between MGM Resorts International and its largest single shareholder, billionaire media mogul Barry Diller and his company IAC Inc.

The agreement, signed on April 3 and disclosed in an SEC Form 8-K filing, establishes a clear framework for how Diller and IAC will exercise their considerable influence over one of the world's biggest casino and resort companies. 

IAC currently owns approximately 66.8 million shares of MGM common stock - a stake it has been steadily building since first taking a 12% position back in August 2020, then valued at around $1billion. 

By late March 2026, the group had accumulated around 23% of the company, making it far and away MGM's most powerful individual investor.

Under the new agreement, Diller and IAC retain full and unrestricted voting rights over any MGM shares they hold up to 25.73% of the company's total voting power. 

However, any shares held above that threshold - referred to as "Excess Voting Securities" - must be voted in exactly the same proportion as the broader shareholder base at any annual or special meeting. 

In other words, the more MGM stock Diller accumulates beyond that level, the less additional control he gains. It is a neat governance mechanism that allows a major investor to grow their economic stake without acquiring disproportionate voting power.

In exchange for accepting this cap, Diller and IAC are guaranteed two seats on MGM's board of directors at all times. Barry Diller currently occupies one of those seats, with former IAC CEO Joey Levin holding the other. 

The agreement will remain in force for as long as the group holds at least 17.5% of MGM's voting securities and MGM continues to nominate two IAC-designated directors. A change of control at MGM would also trigger automatic termination.

For minority shareholders in one of the world's leading casino sites, the arrangement offers meaningful protection. 

It ensures that Diller's growing stake cannot be used to push through decisions against the wishes of the wider shareholder body on contested votes.

The deal comes at a complicated moment for MGM. 

The company's Las Vegas Strip performance has been under pressure, with analysts at Stifel describing near-term earnings growth as a second-half story. 

BetMGM, however, delivered its first profitable year in 2025 and is targeting $500million in EBITDA by 2027. 

Against that backdrop, formalising the governance relationship with its dominant investor sends a signal of stability - whatever turbulence surrounds the broader industry.

Wisconsin Becomes 33rd State To Legalize Online Sports Betting

Just hours before the deadline expired, Wisconsin Governor Tony Evers signed Assembly Bill 601 into law on April 9, making Wisconsin the 33rd US state to legalize online sports betting - and doing so through an entirely tribal-led framework.

Under the new law, the state's 11 federally recognized Native American tribes will hold exclusive rights to offer mobile sports wagering across Wisconsin, provided that betting servers are hosted on tribal lands. 

It mirrors the model used in Florida, where the Seminole Tribe operates the Hard Rock Bet platform as the sole statewide online sportsbook. 

All 11 Wisconsin tribes signed a letter to Evers on April 8 confirming their unanimous support for the bill.

The catch is that Wisconsin gamblers will not be placing mobile bets any time soon. 

The law requires the state to negotiate updated gaming compacts with all 11 tribes that include online sports betting provisions - a process that must then be approved by the federal Bureau of Indian Affairs. 

Compact negotiations typically take months to years, making a 2027 launch the most optimistic realistic scenario.

Major commercial operators including DraftKings, FanDuel, BetMGM, bet365 and Fanatics lobbied hard against the bill. 

The Sports Betting Alliance argued that the tribal monopoly model and the requirement to direct 60% of revenues to the tribes would make Wisconsin unattractive to national sportsbook brands. 

Those brands have not been entirely shut out - DraftKings and FanDuel previously launched in Arkansas under a revenue-share model - but the landscape will be very different from competitive markets like New York or Illinois. 

For now, players looking for real money slots and online casino options in Wisconsin will need to continue looking elsewhere while the compact process plays out.

Polymarket's Iran Ceasefire Bets Spark Insider Trading Firestorm

Prediction markets are at the center of a major controversy this week. 

At least 50 newly created anonymous accounts on Polymarket placed suspiciously well-timed bets on a US-Iran ceasefire, generating hundreds of thousands of dollars in profits just before President Trump announced the deal on April 7.

Blockchain analytics firm Lookonchain identified three accounts that alone made over $480,000 in combined profits. 

One wallet opened just 12 minutes before Trump's announcement wagered $32,000 and netted $48,500. 

In total, more than $170 million has traded on Polymarket's Iran ceasefire contracts.

The White House sent staff a warning against using insider knowledge for prediction market bets. Bipartisan legislation - the Public Integrity in Financial Prediction Markets Act - has been introduced in Congress to ban government officials from trading on policy-related contracts. 

Payouts on some ceasefire contracts remain frozen amid disputes over resolution. 

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Caesars Sale Talks Continue As Fertitta Bid Approaches Crunch Point

The $7bn bid by Tilman Fertitta's Fertitta Entertainment to acquire Caesars Entertainment remains the biggest unresolved story in global casino M&A. 

As of April 10, no signed deal has been publicly announced - but the industry is watching closely, with a formal announcement widely expected before the end of the month.

Fertitta entered exclusive negotiations in mid-March after his offer of around $34 per share topped a competing bid from billionaire investor Carl Icahn, who had offered $33. 

The 45-day exclusivity window that Fertitta secured means any deal would need to be finalised imminently. Sources on both sides continue to caution that a transaction is not guaranteed, but Fertitta has reportedly secured financing commitments and is in final due diligence.

The scale of the deal is vast. Caesars carries more than $11.9bn in reported debt, with the total enterprise value of any transaction exceeding $31.5bn when lease obligations are included. 

A completed acquisition would combine Fertitta's Golden Nugget casino chain with Caesars' portfolio of more than 50 venues - including Caesars Palace, Harrah's, Horseshoe, Eldorado and Tropicana - creating a hospitality and gaming empire rivalling anything the Las Vegas Strip has seen. 

Regulatory approval from gaming authorities across multiple US states would be required before any deal could close, making completion in 2027 the most likely scenario. 

Caesars' upcoming first-quarter earnings report later this month may provide the next major update for investors and industry watchers alike.