Public

Public, the multi-asset brokerage founded in 2019 by Leif Abraham and Jannick Malling , is opening prediction markets to its investing platform with a focus on portfolio utility rather than speculation. The company partnered with Kalshi, one of the largest prediction markets, to launch the product, with Kalshi providing the event contracts and handling the trades while giving Public users access to its markets through Public's platform. The launch is aimed at self-directed investors who already treat macro data, earnings timing, and policy outcomes as inputs to their positioning. The distinguishing piece is how event contracts plug into the rest of a portfolio. Members can trade event contracts or use those markets as signals for trades elsewhere in a portfolio, and investors approve the rules first, after which an agent can act when conditions are met. In practice that means wiring a live probability, say the odds of a Fed rate hike or the timing of an iPhone release, to a conditional action on stocks, bonds, options, or crypto held on the same account. Relevant event probabilities also surface directly on stock pages, so an Apple holder can see contract odds on antitrust outcomes or product timing alongside the ticker. The release matters right now because prediction markets have moved from novelty to a real data layer for public markets, and most access points still treat them as standalone betting venues. By exposing contracts through its API and MCP support for external AI tools, Public is positioning event probabilities as programmable inputs for agentic workflows rather than a separate app, which is consistent with the company's positioning as an agentic brokerage . Founders, operators, and investors evaluating where prediction data fits into execution stacks will find this a concrete reference implementation.