29 JUN 2026

Polymarket Gets Probed, Kalshi's $40bn Raise, and Zuck Wants PM

News Roundup: The regulators and the courts come for Polymarket. Kalshi are in talks to raise at a $40bn valuation. And Meta may be building their own PM. Plus, everything else in prediction markets this week.

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1. Regulators and Courts Come for Polymarket After WSJ Investigation

The CFTC are now investigating Polymarket. Senators want a federal probe on top of it, and Polymarket are being sued over a covert influencer campaign built on fake winnings.

This follows a Wall Street Journal investigation showing that Polymarket ran a covert influencer campaign built on fake winnings.

WSJ reviewed 1,105 videos from ten creators tied to a Polymarket marketing contractor. Around 70% showed a bet, totalling roughly $1.9 million.

The catch? None of them were real.

118 of the videos showed creators "winning" almost $900,000. Had the bets been genuine, those same creators would have lost more than $166,000.

The fakes were staged on dummy sites built to look like Polymarket, designed to push viewers onto the real, offshore platform. The creators were mostly college-age, paid two to three thousand dollars a month, and told not to disclose the arrangement. One student posted a video of "winning" $100,000 on a bet that Trump would say the word "McDonald's" that month.

National Association of Consumer Advocates sued Polymarket over the campaign, alleging they deliberately targeted college students, a group with problem-gambling rates around twice that of adults. Polymarket say they are auditing their promotional content and have launched an internal investigation.

Kalshi

Kalshi are in talks to raise at a $40bn valuation, according to the FT. That is roughly double the $22bn they were valued at in May 2026, when they raised $1bn in a Series F.

It follows a record run. Kalshi did $17.91bn in notional volume in May 2026, their ninth straight monthly record, up 21% on April 2026.

And they are pulling away from Polymarket. Kalshi's open interest, the value of live contracts, now sits at $796m against Polymarket's $424m, the widest that gap has ever been.

A lot of this is the World Cup, though, with the fresh records directly linked to the tournament.

On Zuck’s request, an internal team at Meta are building a prediction market called ‘Arena’, which would be independent of Facebook and Instagram.

According to the New York Times:

“Users would not wager money, and the app would probably rely on a video-game-like points system instead, one person said, though the company had not ruled out the eventual use of real money betting.”

Meta aims to grow the app by leveraging its large social networking audiences and directing them towards using it.

🗞 General

🤝 Announcements & Partnerships

  • DraftKings Launches Its Own Prediction Markets Exchange as Volume Tops $3B (Read more here)

  • Kalshi Partners With ADI Predictstreet to Expand World Cup Markets (Read more here)

  • Glimpse Debuts Bitcoin Prediction Market to Reward Accurate Price Forecasting (Read more here)

  • Chainlink Brings Samsung, Toyota and Sony Pricing On-Chain With APAC Equities Streams (Read more here)

💰 Funding and M&A

  • Illinois Sued Over Prediction Market Law Imposing New Taxes and Regulations (Read more here)

  • Kalshi Asks Court to Dismiss Tribal Challenge to Sports Prediction Markets (Read more here)

  • More Than Two Dozen Prediction Market Bills Reflect Congressional Attention, Not Agreement (Read more here)

  • CFTC Sues Kentucky, the Ninth State Pulled Into the Jurisdiction Fight (Read more here)

  • US Senators Push to End the CFTC's 'Assault' on State Oversight of Prediction Markets (Read more here)

  • Gensler and a CME Lawsuit Add to the Pushback Against Prediction Markets (Read more here)

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