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A proposed class action lawsuit filed in the U.S. District Court for the Southern District of New York accuses cryptocurrency exchange BitMEX, its parent company HDR Global Trading Ltd., and co-founders Arthur Hayes, Ben Delo, and Samuel Reed of unfair trading practices.
A proposed class action lawsuit alleges cryptocurrency exchange BitMEX deliberately engineered its trading engine to force automated liquidations and seize millions of dollars in bitcoin collateral from everyday investors. Filed in federal court in New York, the lawsuit seeks to represent U.S. traders who lost funds on BitMEX bitcoin swap products since July 2018.
The complaint, filed in the U.S. District Court for the Southern District of New York, names BitMEX parent company HDR Global Trading Ltd., several affiliated entities, and co-founders Arthur Hayes, Ben Delo, and Samuel Reed as defendants. Lead plaintiffs BKX Services Inc. and David Namdar filed the case on behalf of a proposed class of affected U.S. cryptocurrency investors.
The plaintiffs claim they suffered massive financial harm directly caused by BitMEX’s unfair liquidation practices. According to court documents, BKX Services lost at least 305.81 bitcoin, while Namdar lost over 316.85 bitcoin. Together, their combined losses equal 622.66 bitcoin, valued at approximately $40.7 million at the time of the filing.
At the center of the lawsuit is how BitMEX marketed and executed its high-leverage derivative products. The exchange allowed customers to trade bitcoin swap contracts with leverage as high as 100 times their deposited collateral. While high leverage permits traders to control large positions with small amounts of capital, it also dramatically increases sensitivity to small market price swings. The plaintiffs allege that BitMEX used this volatile environment to systematically strip users of their assets.
In standard financial trading, margin liquidations exist to protect both the platform and the trader from debt when a position moves sharply against an investor. When a trader’s losses exhaust their required margin collateral, an automated risk engine closes the position to prevent negative account balances.
However, the lawsuit claims BitMEX designed a deceptive mechanism that triggered liquidations long before a customer’s deposited collateral was actually exhausted. According to the complaint, when the exchange forcibly closed a user’s trade, the remaining collateral was often still worth significantly more than the real financial loss incurred by the position.
Instead of returning this excess bitcoin collateral to the trader’s account balance, BitMEX allegedly diverted the remaining funds directly into an exchange-controlled “insurance fund.” The complaint states, “BitMEX deliberately developed a system that profited from the liquidations,” turning a standard risk management tool into a lucrative source of revenue for the company at the expense of everyday people.
Beyond the automated liquidation engine, the class action lawsuit highlights additional unfair practices that allegedly placed retail traders at a severe disadvantage. The complaint claims BitMEX operated a secret, internal trading desk that possessed special access to confidential, real-time customer trading data and order book information.
The plaintiffs allege this internal trading team used private customer data to trade directly against retail users. To make matters worse, the lawsuit points to repeated, platform-wide server freezes and outages that occurred during periods of high market volatility.
When crypto prices fluctuated rapidly, ordinary users were frequently locked out of their accounts, unable to log in, adjust stop-loss orders, or manage their open positions. Meanwhile, the complaint alleges that BitMEX’s internal trading desk maintained continuous access to the system, allowing privileged insiders to execute trades and trigger mass user liquidations while regular investors watched helplessly as their collateral was seized.
The timing of the lawsuit coincides with a major transition for the platform. Just hours before the complaint was filed in federal court, BitMEX’s parent company announced that the cryptocurrency exchange will permanently cease operations on Sept. 23, 2026.
Following the shutdown announcement, BitMEX halted new account registrations and restricted existing account holders to closing out current open positions. While corporate leadership framed the closure as a voluntary business decision, the sudden wind-down leaves thousands of former and current traders searching for answers regarding their historical account losses.
This is not the first time BitMEX’s liquidation engine has drawn legal scrutiny. A similar class action filed in 2020 raised parallel concerns regarding exchange manipulation and forced liquidations, though that case was eventually dismissed without prejudice in June 2025. The newly filed lawsuit revives these core allegations with updated legal claims, providing U.S. traders a renewed opportunity to hold companies accountable for improper market practices.
Under U.S. financial and contract law, trading platforms and derivatives brokers owe their customers a fundamental duty of good faith and fair dealing. While cryptocurrency derivative trading carries inherent market risks, exchanges are legally prohibited from rigging trading rules, misusing confidential customer data, or converting user collateral into corporate assets through deceptive means.
When financial platforms deploy unfair algorithms or exploit platform outages to siphon user capital, affected consumers have the right to seek legal remedies under federal commodities laws, consumer protection statutes, and common law fraud principles.
Because individual traders rarely possess the financial resources to litigate against multi-billion-dollar global entities on their own, class action litigation serves as a vital tool. A class action combines thousands of similar claims into a single legal proceeding, equalizing the playing field so everyday people can challenge corporate misconduct without taking on enormous personal legal costs.
If you used BitMEX to trade cryptocurrency derivatives, you may be eligible to participate in this legal action or seek compensation for improperly seized collateral.
You may qualify as a class member if you meet the following criteria:
Platform Usage: You registered an account and traded bitcoin perpetual swaps or leveraged derivative products on the BitMEX exchange.
Relevant Timeline: Your trading activity and position liquidations occurred on or after July 23, 2018.
Geographic Scope: You resided in or conducted trades from within the United States during the period you used the platform.
Financial Impact: You experienced automated position liquidations where remaining margin collateral was retained by the exchange rather than refunded.
You do not need to have suffered millions of dollars in losses like the lead plaintiffs to hold valid legal rights. Class action settlements and judgments are structured to compensate all qualifying group members, regardless of whether their individual losses were large or small.
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