Underdog Lawsuits: Litigation Tracker
Last updated November 8, 2026. Snapshot, not legal advice.
Cases
10
Pending
10
Pro-market
0
Anti-market
0
Summary
Underdog is a party to 10 cases of the 90 on this tracker, involving 8 states.
Pending (10)
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Missouri Attorney General cease-and-desist letters (September 2026)
Also named: Kalshi, Polymarket, Robinhood, Crypto.com, Novig
Novig and Crypto.com’s exchange sued Missouri’s Attorney General and Gaming Commission officials as the thirty-day windows closed (October 16, 2026), and Kalshi followed on October 27 after its extended deadline drew no assurance of non-enforcement.Checked Nov 8, 2026
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Ohio Casino Control Commission cease-and-desist letters (October 2026)
Also named: Polymarket, Robinhood, Coinbase, Novig, Gemini, Webull, ProphetX
Ohio’s Casino Control Commission ordered ten platforms and brokers to stop offering sports event contracts in Ohio and confirm compliance within fourteen days, citing the Sixth Circuit’s decision (October 2, 2026).Checked Nov 8, 2026
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Underdog Exchange DCM Inc. v. Brown
No. 2:26-cv-03200
Washington moved to dismiss Underdog’s suit (October 28, 2026), and Underdog moved the next day for a preliminary injunction or, alternatively, a stay pending appeal; neither has been decided.Checked Nov 8, 2026
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Underdog Exchange DCM, Inc. v. Skrmetti
No. 3:26-cv-01461
Underdog sued Tennessee’s Attorney General and Sports Wagering Council four days after the Council’s October 9 letter on its sports event contracts (October 13, 2026).Checked Nov 8, 2026
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Underdog Exchange DCM, Inc. v. Wilson
No. 1:26-cv-02169
Underdog sued OH officials (September 8, 2026) for a declaration that federal law preempts state enforcement against its sports event contracts.Checked Nov 8, 2026
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Connecticut cease-and-desist orders to nine platforms (September 2026)
Also named: Polymarket, Robinhood, Coinbase, Crypto.com, Novig, Gemini, Webull, ProphetX
Connecticut ordered nine more platforms to stop offering sports event contracts (September 10, 2026). By early October state officials had told reporters that ProphetX, Gemini and Webull had withdrawn from the state, and Underdog had sued.Checked Nov 8, 2026
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Underdog Exchange DCM, Inc. v. Campbell
No. 1:26-cv-14098
Underdog sued MA officials (September 8, 2026) for a declaration that federal law preempts state enforcement against its sports event contracts.Checked Nov 8, 2026
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Underdog Exchange DCM, Inc. v. Kaul
No. 3:26-cv-00858
Underdog sued WI officials (September 8, 2026) for a declaration that federal law preempts state enforcement against its sports event contracts.Checked Nov 8, 2026
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Underdog Exchange DCM, Inc. v. Tong
No. 3:26-cv-01499
Underdog sued Connecticut’s Attorney General and consumer-protection regulators (September 15, 2026) days after receiving one of the state’s new cease-and-desist orders.Checked Nov 8, 2026
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Underdog Exchange DCM, Inc. v. Torrez
No. 1:26-cv-02935
Underdog sued NM officials (September 8, 2026) for a declaration that federal law preempts state enforcement against its sports event contracts.Checked Nov 8, 2026
What Changed
October 2026
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Underdog Exchange DCM Inc. v. Brown
Washington moved to dismiss Underdog’s preemption suit, and Underdog moved the next day for a preliminary injunction or, alternatively, a stay pending appeal. The case was reassigned to Judge Benjamin H. Settle; the motions are noted for November 25 and 27.
W.D. Wash. No. 2:26-cv-03200, Dkt. 22 and 26 (docket text) -
Underdog Exchange DCM, Inc. v. Wilson
Judge Nugent set Ohio’s response to Underdog’s injunction motion for November 16 and Underdog’s reply for December 7, with a case management conference on December 9.
N.D. Ohio No. 1:26-cv-02169, ECF 25 and 26 (docket text) -
Ohio Casino Control Commission cease-and-desist letters (October 2026)
Robinhood Derivatives agreed to stop offering new sports event contracts in Ohio by November 2, in exchange for the Casino Control Commission’s agreement not to enforce while the Sixth Circuit and Supreme Court appeals are pending.
Robinhood Markets, Form 10-Q for the quarter ended September 30, 2026 -
Ohio Casino Control Commission cease-and-desist letters (October 2026)
The Casino Control Commission ordered its own licensees, including sportsbooks and suppliers, to stop servicing platforms that offer sports event contracts in Ohio and to confirm compliance by October 30.
Ohio Casino Control Commission licensee notice (Oct. 20, 2026; PDF hosted by Sports Betting Dime) -
Missouri Attorney General cease-and-desist letters (September 2026)
Missouri’s thirty-day deadlines passed without a suit by the State. Novig and Crypto.com’s exchange sued in federal court instead; Kalshi, Polymarket, Robinhood and Underdog had not, as of the latest docket checks.
Complaint, Ludlow Exchange, LLC d/b/a Novig v. Hanaway, E.D. Mo. No. 4:26-cv-01780 -
Underdog Exchange DCM, Inc. v. Wilson
Underdog asked the Ohio federal court for a preliminary injunction, or alternatively a stay pending appeal, on October 16, the deadline in the Casino Control Commission’s cease-and-desist letter.
Docket, N.D. Ohio No. 1:26-cv-02169 (ECF 13)
14 more changes
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Underdog Exchange DCM, Inc. v. Skrmetti
Underdog sued Tennessee’s Attorney General and Sports Wagering Council four days after the Council’s October 9 letter on its sports event contracts. The Sixth Circuit’s September 25 ruling binds the court; an initial conference is set for January 28, 2027.
Docket, M.D. Tenn. No. 3:26-cv-01461 -
Ohio Casino Control Commission cease-and-desist letters (October 2026)
Ohio’s Casino Control Commission sent cease-and-desist letters to ten platforms and brokers (Underdog, Gemini, Coinbase, ProphetX, Novig, Robinhood, Polymarket US, Plus500, Moomoo and Webull), citing the Sixth Circuit’s September 25 decision. Each must confirm compliance by October 16.
Ohio Casino Control Commission letters, October 2, 2026
September 2026
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Underdog Exchange DCM, Inc. v. Tong
Underdog’s Connecticut suit was transferred to Judge Oliver, who now has every Connecticut prediction-market case.
CourtListener — 3:26-cv-01499 -
Missouri Attorney General cease-and-desist letters (September 2026)
We said Missouri’s letter stated no deadline. All six letters give thirty days from their date, so the windows close October 16 for Kalshi, Polymarket, Crypto.com and Robinhood and October 17 for Novig and Underdog, after which the State says it will sue.
Missouri AG — letter to Kalshi -
Missouri Attorney General cease-and-desist letters (September 2026)
Missouri’s Attorney General told Kalshi, Polymarket, Crypto.com, Novig, Underdog and Robinhood to stop offering sports event contracts or be licensed and taxed as sportsbooks. No suit has been filed by either side.
Missouri AG — letter to Kalshi -
Underdog Exchange DCM Inc. v. Brown
Underdog’s Washington case is before Judge David W. Christel in Tacoma, not Judge Zilly: after Judge Lasnik recused, the clerk reassigned it on September 15 as a Tacoma division case.
W.D. Wash. docket No. 2:26-cv-03200 -
Underdog Exchange DCM, Inc. v. Tong
Underdog became the first platform to sue over Connecticut’s September 10 cease-and-desist orders, seeking a declaration that federal law preempts the state’s gambling law.
CourtListener — 3:26-cv-01499 -
Connecticut cease-and-desist orders to nine platforms (September 2026)
Connecticut ordered nine more platforms — Polymarket, Coinbase, Crypto.com, Robinhood, ProphetX, Novig, Webull, Gemini and Underdog — to stop offering sports event contracts, and subpoenaed about thirty vendors, app stores and media organizations.
Governor of Connecticut — announcement -
Underdog Exchange DCM, Inc. v. Kaul
Underdog’s Wisconsin suit names both the Attorney General and the Division of Gaming administrator, John Dillett, and is brought by Underdog Exchange DCM together with UDM, LLC. We had listed one plaintiff and one defendant.
Docket, W.D. Wis. No. 3:26-cv-00858 -
Underdog Exchange DCM, Inc. v. Campbell
Underdog Exchange DCM sued MA officials to bar enforcement against its sports event contracts — one of six Underdog preemption suits filed in a week.
CourtListener — Underdog Exchange DCM, Inc. v. Campbell -
Underdog Exchange DCM, Inc. v. Wilson
Underdog Exchange DCM sued OH officials to bar enforcement against its sports event contracts — one of six Underdog preemption suits filed in a week.
CourtListener — Underdog Exchange DCM, Inc. v. Wilson -
Underdog Exchange DCM, Inc. v. Kaul
Underdog Exchange DCM sued WI officials to bar enforcement against its sports event contracts — one of six Underdog preemption suits filed in a week.
CourtListener — Underdog Exchange DCM, Inc. v. Kaul -
Underdog Exchange DCM, Inc. v. Torrez
Underdog Exchange DCM sued NM officials to bar enforcement against its sports event contracts — one of six Underdog preemption suits filed in a week.
CourtListener — Underdog Exchange DCM, Inc. v. Torrez -
Underdog Exchange DCM Inc. v. Brown
Underdog Exchange DCM sued WA officials to bar enforcement against its sports event contracts — one of six Underdog preemption suits filed in a week.
CourtListener — Underdog Exchange DCM Inc. v. Brown