TLDR Kalshi faces a proposed class action lawsuit filed in a Manhattan federal court. Plaintiffs claim the company shared trading activity and personal data with third-party advertisers. The lawsuit says trackers from Google, TikTok, and LinkedIn were embedded on Kalshi’s website and app. Three named plaintiffs want to represent a nationwide class of Kalshi users. The case follows a separate ruling against Kalshi in a New York gambling dispute.
Kalshi is facing a new legal fight. A proposed class action lawsuit was filed against the company in federal court in Manhattan.
The lawsuit arrived just days after a judge refused to shield Kalshi from New York gambling regulators. That earlier case focused on the company’s sports-event contracts.
This new lawsuit is about something different. It claims Kalshi secretly shared user data with outside advertisers.
Allegations of Secret Data Sharing
Plaintiffs say Kalshi placed hidden trackers on its site and app. These trackers reportedly came from companies like Google, TikTok, and LinkedIn.
The complaint claims this let outside companies see what event contracts users viewed. It also allegedly tracked what people researched or traded.
The lawsuit was brought by the law firms Sterlington and Lite DePalma Greenberg & Afanador. They accuse both Kalshi Inc. and Kalshi of sending user activity to third parties without permission.
Plaintiffs point to Kalshi’s own rulebook. They say it requires clear consent before personal information is used for marketing.
The complaint argues Kalshi ignored that rule. It claims the company collected far more than basic contact details.
According to the lawsuit, Kalshi linked real identities to financial information. It also allegedly recorded what users searched, viewed, followed, bought, and sold.
Because Kalshi’s contracts are tied to real-world events, plaintiffs say this data reveals more than trading habits. They claim it can expose a