Key Takeaways
- A class action lawsuit has been filed against Kalshi regarding its settlement of a prediction market focused on Iranian Supreme Leader Ali Khamenei’s departure from power.
- Contract holders who bet “yes” anticipated receiving the complete $1 per share payout following reports of Khamenei’s death on Feb. 28, but the platform enforced a “death carveout” provision.
- Trading volume in this market surpassed $54 million; the two primary plaintiffs maintained positions worth approximately $259.84.
- The platform compensated users for trading fees and net losses, claiming no participant suffered financial harm, though plaintiffs demand complete contract value alongside punitive damages.
- Tarek Mansour, Kalshi’s co-founder, maintained the provision was explicitly outlined and emphasized the platform prohibits markets enabling profit from mortality events.
A class action lawsuit has been lodged against prediction market platform Kalshi in the US District Court for the Central District of California. The legal action focuses on the platform’s settlement methodology for a market questioning “Ali Khamenei out as Supreme Leader?”
We stand by principle and law:
1. Kalshi didn’t deviate from its market rules. They were clear that death did not resolve the market to “Yes”.
2. Kalshi’s rules prevented a ‘death market’, where traders directly profit from death. This is a good thing (+ we’re a US based… https://t.co/gXMeQECFLz
— Tarek Mansour (@mansourtarek_) March 6, 2026
This particular market posed the question of whether Khamenei would vacate his position before March 1, 2026. Participants purchasing “yes” shares anticipated receiving a complete $1 payout for each share should the predicted outcome materialize.
On Feb. 28, numerous news organizations reported Khamenei’s passing. Market participants interpreted this development as confirmation that their positions would yield full-value settlements.
However, Kalshi implemented what the company designates as a “death carveout provision.” Under this framework, when a political figure departs office exclusively through death, the market settles at the final trading price instead of distributing complete payouts to winning positions.
The plaintiffs contend this provision was concealed within dense technical market documentation. Their argument asserts the rule lacked sufficient visibility for typical traders to identify prior to executing trades.
According to the legal filing, the carveout provision was “not incorporated into the user-facing rules summary.” The complaint further alleges the policy failed to appear in a manner that would reasonably notify consumers.
The complaint notes that Kalshi subsequently conceded their previous disclosures contained “grammatically ambiguous” language.
The primary plaintiffs in the case maintained positions valued at roughly $259.84. The market’s aggregate trading volume exceeded $54 million.
How Kalshi Responded to the Allegations
Tarek Mansour, co-founder of Kalshi, publicly responded to the controversy on X. He explained the platform maintains an established policy prohibiting markets that enable traders to derive profit directly from mortality events.
“We don’t list markets directly tied to death,” Mansour stated. He emphasized the provision existed within the market terms and was accessible to participants.
Kalshi provided reimbursement for all trading fees and net losses associated with this market. The company maintains that no trader experienced a financial loss.
Mansour also conceded the platform has room for improvement in presenting rules more prominently before traders execute their positions.
Demands From the Plaintiffs
The reimbursements have not satisfied the plaintiffs. Their legal action pursues compensatory damages equivalent to the complete anticipated payout values.
Additionally, they seek punitive damages intended to prevent comparable practices going forward.
The complaint characterizes the carveout policy as “predatory” and constituting an “unfair business practice,” contending that in a market concerning an 85-year-old leader amid military tensions, death represented the most probable scenario.
Kalshi recently completed a funding round valuing the company at $11 billion. This fundraising occurred as prediction markets experience unprecedented trading volumes throughout 2026.
