Horizon links platform to Kalshi for institutional market-making

Horizon Trading Solutions has added native connectivity to Kalshi, the CFTC-regulated exchange for event contracts, enabling institutional market makers to quote, trade and hedge event outcomes using Horizon’s electronic trading system.

The Paris-based provider said the capability is available immediately to existing and new clients and allows firms to handle event contracts alongside cash equities and listed derivatives within a single platform.

The integration provides direct market access to Kalshi and supports functions specific to event products: rapid repricing, probability-based quoting and cross-venue hedge management without switching platforms.

Horizon described the platform features as low-latency execution, high message throughput, integrated risk controls and continuous 24/7 monitoring, intended to support liquidity provision and limit exposure on short-dated contracts.

Kalshi operates under CFTC oversight and lists contracts tied to real-world events, where prices reflect changing probabilities as new information arrives.

Andy Ross, Head of Institutional at Kalshi, commented: “The growth of institutional liquidity is an important milestone in the evolution of event markets. Horizon Trading Solutions’ native connectivity helps professional market makers participate more efficiently and deepen liquidity across Kalshi markets.” Sylvain Thieullent, CEO of Horizon Trading Solutions, added: “Event-driven markets are becoming increasingly important for institutional market participants. We are enabling market makers to provide liquidity on Kalshi with institutional-grade infrastructure that scales with growing demand while addressing the unique challenges of event contracts, including pricing, risk management and hedging very short-dated exposures.”

The integration is designed to let market makers route orders, manage hedges and monitor risk across venues from one operating environment.