# Polymarket Type: Company Source: Startup Intelligence Brief — https://getstartupbrief.com/entity/polymarket-company Canonical HTML page: https://getstartupbrief.com/entity/polymarket-company ## Timeline - **2026-03-24**: Coordinated Response — Kalshi and Polymarket announce sweeping new bans on insider trading and high-risk participants. - **2026-03-23**: Legislative Threat — Bipartisan Senate bill introduced to ban sports betting on prediction platforms. - **2026-03-23**: Suspicious Activity — Reports emerge of insider trading on US-Iran ceasefire contracts. - **2026-03-22**: State Pressure — Illinois regulators declare prediction markets a form of illegal gambling. - **2026-03-15**: Anticipated State Hearing — Expected date for initial state court arguments regarding the legality of prediction markets in Nevada. - **2026-03-03**: Federal Remand Issued — Judge sends cases back to Nevada state court, shifting jurisdiction to local gaming regulators. - **2026-03-03**: Injunction Threat — Nevada authorities signal intent to file for immediate temporary injunctions against both platforms. ## Recent coverage (10 stories) ### Kalshi Surpasses DraftKings Users as Startup Captures 27% of World Cup Bets 2026-07-19 22:55:15 · Sentiment: Bullish · Impact: 6/10 · Sources: 2 Startup Kalshi had more daily app users than DraftKings or FanDuel during the World Cup as prediction markets claimed 27% of US sports betting. The milestone underscores how a two-year-old startup upended a regulated industry through federal regulatory arbitrage and aggressive marketing. Full story: https://getstartupbrief.com/story/kalshi-startup-27-world-cup-bets ### Meta's Arena Takes No-Cash Shot at $10B Prediction Startups 2026-06-24 22:57:24 · Sentiment: Neutral · Impact: 6/10 · Sources: 2 Meta’s Arena is a points-based prediction app that could threaten—or validate—startups like Polymarket and Kalshi. The move highlights the surging $10B+ prediction market sector and potential for Big Tech to reshape competition. Full story: https://getstartupbrief.com/story/meta-arena-startup-rival ### Startup Polymarket Sees $1M Bet Go Bust During World Cup Shocker 2026-06-22 13:27:21 · Sentiment: Neutral · Impact: 5/10 · Sources: 2 Polymarket, the crypto prediction market startup, saw a single user lose nearly $1 million on Spain’s draw with Cabo Verde. The event showcases the platform's ability to attract high-stakes sports bettors and the delicate balance between explosive growth and unmanaged regulatory risk. Full story: https://getstartupbrief.com/story/startup-polymarket-1m-world-cup-bet-loss ### Prediction Market Giants Kalshi and Polymarket Enforce Insider Trading Bans 2026-03-24 16:51:58 · Sentiment: Neutral · Impact: 6/10 · Sources: 3 Leading prediction markets Kalshi and Polymarket have introduced strict new prohibitions on insider trading to bolster market integrity and regulatory compliance. The move marks a significant professionalization of the industry as it seeks to transition from niche speculative platforms to mainstream financial instruments. Full story: https://getstartupbrief.com/story/kalshi-polymarket-insider-trading-ban-regulation ### Kalshi and Polymarket Enact Insider Trading Bans Amid Rising Senate Scrutiny 2026-03-24 08:48:38 · Sentiment: Bearish · Impact: 7/10 · Sources: 2 Leading prediction markets Kalshi and Polymarket have implemented sweeping new bans on insider trading to preempt restrictive federal legislation. The move comes as US Senators advance a bipartisan bill aimed at curbing the platforms' expansion into sports and political betting. Full story: https://getstartupbrief.com/story/kalshi-polymarket-insider-trading-bans-regulation ### Coinsilium Enters Prediction Markets with Strategic Venture-Building Move 2026-03-21 13:09:36 · Sentiment: Neutral · Impact: 5/10 · Sources: 2 Coinsilium Group has announced a strategic expansion into the decentralized prediction markets sector, leveraging its venture-building model to support emerging protocols. The move follows a period of record-breaking volume for prediction platforms, signaling Coinsilium's intent to capture market share in the rapidly evolving forecasting economy. Full story: https://getstartupbrief.com/story/coinsilium-prediction-markets-venture-building ### States Accuse Kalshi and Polymarket of Evading Sports Betting Regulations 2026-03-08 22:10:32 · Sentiment: Bearish · Impact: 6/10 · Sources: 2 State regulators are intensifying scrutiny on prediction markets Kalshi and Polymarket, alleging the platforms are offering unlicensed sports betting. The move threatens to disrupt the companies' ambitious $20 billion valuation targets as they face a jurisdictional clash between federal event contract rules and state gambling laws. Full story: https://getstartupbrief.com/story/kalshi-polymarket-state-regulation-sports-betting ### Rivalry at the Edge of Truth: The Bitter Feud Fueling the Prediction Market Boom 2026-03-06 15:18:40 · Sentiment: Neutral · Impact: 6/10 · Sources: 4 The explosive growth of prediction markets has been catalyzed by a fierce personal rivalry between Polymarket's Shayne Coplan and Kalshi's Tarek Mansour. As these platforms move from niche crypto projects to mainstream financial tools, the clash between their regulated and decentralized philosophies is defining the future of the 'truth economy.' Full story: https://getstartupbrief.com/story/billionaire-feud-prediction-market-boom ### Nevada Court Ruling Threatens Trading Halt for Kalshi and Polymarket 2026-03-03 11:07:16 · Sentiment: Bearish · Impact: 6/10 · Sources: 2 A federal judge has remanded Nevada's legal challenges against Kalshi and Polymarket to state court, clearing the path for regulators to seek immediate trading halts. The decision intensifies pressure on prediction markets as authorities investigate concerns over insider trading and unfair information advantages. Full story: https://getstartupbrief.com/story/nevada-court-ruling-kalshi-polymarket-halt ### Dragonfly Defies 'Mass Extinction' With $650 Million Fourth Crypto Fund 2026-02-18 21:30:11 · Sentiment: Bullish · Impact: 7/10 · Sources: 3 Dragonfly Capital has successfully closed its fourth venture fund at $650 million, signaling a flight to quality in the digital asset space. The raise comes as the broader blockchain venture capital landscape faces a period of severe consolidation and capital scarcity. Full story: https://getstartupbrief.com/story/dragonfly-closes-650-million-fourth-crypto-fund --- This page is a machine-readable summary. Sentiment measures the directional read of each development for this entity, not the tone of the reporting; impact weights consequence, not syndication reach. 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