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MLex

September 14, 2026

TopstepTrader LLC v. Nuvei Technologies Incorporated

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Case Number:

2:26-cv-06567

Court:

Arizona

Nature of Suit:

Contract: Other

Judge:

Sharad H Desai

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Companies

Sectors & Industries:

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Reflects complaints, answers, motions, orders and trial notes entered from Jan. 1, 2011.
Additional or older documents may be available in Pacer.

Coverage

  1. September 15, 2026

    Fintech Co. Says Nuvei Bungled Mastercard Transactions

    Chicago-based fintech and futures prop trading firm Topstep has sued Nuvei Technologies in Arizona federal court, alleging the payment processor concealed a system error that bungled 189,000 Mastercard transactions and then tried to improperly resubmit them, leaving Topstep's customers "blindsided with unexpected charges" and resulting in reputational harm to Topstep.

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