Published: August 17, 2026

Polymarket Faces Baltimore Lawsuit and Lost JPMorgan Banking Relationship

Polymarket, the world’s largest decentralized prediction market, is facing a double wave of legal and financial headwinds. The platform has been hit with a lawsuit from the City of Baltimore accusing it of operating an unlicensed sportsbook. This legal challenge comes alongside revelations that Wall Street giant JPMorgan Chase quietly severed its banking relationship with the platform last year due to mounting regulatory concerns. Together, these developments signal a tightening vice of regulatory and traditional financial pressure on the popular betting platform.

Quick Facts

• The City of Baltimore has filed a lawsuit against prediction market operators Polymarket and Kalshi in the Circuit Court for Baltimore City.
• Baltimore officials accuse both platforms of running unlicensed sportsbooks by allowing residents to bet on game outcomes, point spreads, and point totals.
• JPMorgan Chase terminated its primary banking relationship with Polymarket in October of last year, citing regulatory uncertainties.
• Despite cutting banking ties, JPMorgan reportedly maintains other business connections with Polymarket, including discussions surrounding a potential future initial public offering (IPO).
• The dual setbacks highlight the growing friction between emerging decentralized finance (DeFi) platforms and traditional financial and regulatory institutions.

What Happened

The City of Baltimore, led by Mayor Brandon Scott and the City Council, filed formal complaints in the Circuit Court for Baltimore City against Polymarket and its competitor Kalshi. The lawsuit alleges that both platforms have crossed the line from event-based prediction markets into unregulated sports gambling. According to the city, the platforms have permitted Baltimore residents to place wagers on traditional sports metrics, including game winners, point spreads, and point totals, without obtaining the necessary sports wagering licenses required by Maryland law.

Simultaneously, reports emerged that JPMorgan Chase ended its banking relationship with Polymarket in October of last year. The decision by the United States' largest bank to "debank" the platform forced Polymarket to scramble for alternative financial partners to custody its funds and facilitate transactions amid an increasingly hostile regulatory environment for crypto-adjacent firms.

Key Details

The Baltimore lawsuit represents a new front in the regulatory war against prediction markets. While federal agencies like the Commodity Futures Trading Commission (CFTC) have previously targeted these platforms, Baltimore's legal action utilizes municipal and state-level gaming laws. The city argues that by offering contracts tied directly to athletic performances and game scores, Polymarket and Kalshi are operating as de facto sportsbooks, bypassing local tax obligations and consumer protection standards.

On the banking side, JPMorgan’s decision to cut ties highlights the compliance anxieties plaguing Wall Street. In October of last year, JPMorgan informed Polymarket that it would no longer service its accounts. However, the separation is not entirely clean. Sources indicate that JPMorgan is keeping its foot in the door, maintaining investment banking dialogues with Polymarket as the platform explores a potential high-profile IPO in the future. This dual-track approach allows the bank to shield itself from immediate regulatory blowback while positioning itself to profit from a future public debut.

Background

Polymarket has experienced explosive growth over the last year, driven largely by high-volume betting on geopolitical events, macroeconomic indicators, and the U.S. presidential election. However, this rise to prominence has attracted intense scrutiny. The platform previously reached a $1.4 million settlement with the CFTC in 2022 for offering unregistered option contracts, forcing it to restrict U.S. residents from trading on its main site—though critics argue geofencing measures are easily bypassed.

Kalshi, Polymarket's regulated rival, has faced its own share of hurdles. Kalshi was recently ordered by a Washington court to halt most of its event contracts, including those tied to politics, sports, and entertainment, under a sweeping injunction. The coordinated pushback from both courts and municipal governments suggests a systemic effort to curb the expansion of prediction markets before they become deeply entrenched in the mainstream financial ecosystem.

Why It Matters

The developments underscore the precarious position of decentralized platforms attempting to bridge the gap between Web3 and traditional finance. JPMorgan’s cautious stance is emblematic of the broader banking sector's reluctance to support crypto-native platforms that operate in regulatory gray areas. When major financial institutions withdraw services, it severely limits a platform's liquidity options and operational stability.

Furthermore, Baltimore’s lawsuit sets a dangerous precedent for Polymarket. If a single municipality can successfully sue a prediction market for operating an unlicensed sportsbook, it could open the floodgates for hundreds of other cities and states to file similar suits. This would create a fragmented and highly complex legal landscape that could prove impossible for decentralized platforms to navigate.

What Happens Next

In the coming months, the Circuit Court for Baltimore City will hear arguments regarding whether prediction contracts on sports constitute illegal sports betting under Maryland law. Polymarket and Kalshi will likely argue that their contracts are derivative instruments rather than traditional sports wagers, a distinction that could define the legal boundaries of the industry.

Meanwhile, Polymarket will continue to navigate its financial operations using alternative lenders. The platform's long-term viability may depend heavily on whether it can maintain its path toward an IPO, and whether investment banks like JPMorgan will ultimately underwrite a public launch if state and local lawsuits continue to mount.

As the legal battles unfold, the prediction market industry finds itself at a critical crossroads, forced to defend its business model against both local prosecutors and cautious Wall Street allies.