Citadel Securities
Citadel Securities LLC is a global market-making firm based in Miami, Florida. It specializes in providing liquidity and trade execution services to both retail and institutional clients around the world. As the largest designated market maker on the New York Stock Exchange, Citadel Securities plays a vital role in ensuring fair and accessible markets across various asset classes, including equities, options, fixed income, and foreign exchange. The firm offers a wide range of financial products and services, such as liquidity provision and trading in futures, equities, credit, options, curren
Investing activity
Citadel Securities appears in 1 AI deal tracked by the Lounge deals desk, rounds totalling $325M. The rounds are mostly Series C, with a median round size of $325M. The most recent is ASI (Series C, $325M, Oct 2026).
Citadel Securities most often invests alongside Spark Capital, Craft Ventures and Meritech Capital, and the companies it backs on Lounge are mostly in AI simulation and monitoring.
Deals
Frequently asked questions about Citadel Securities
What AI companies has Citadel Securities invested in?
Citadel Securities's AI investments include ASI. The 1 round on Lounge are listed on this page with amounts, dates and co-investors.
Where is Citadel Securities based?
Citadel Securities is based in Miami, Florida, United States.
What stage does Citadel Securities invest at?
In the rounds tracked on Lounge, Citadel Securities has invested at Series C, with a median round of $325M.
Who does Citadel Securities co-invest with?
Citadel Securities's most frequent co-investors on Lounge are Spark Capital (1 deal), Craft Ventures (1 deal) and Meritech Capital (1 deal).
How can founders reach Citadel Securities?
Founders on Lounge can see Citadel Securities's contact details in AI Investor Contacts (paid plans), check for a warm introduction through members who worked with the firm under Warm Paths, and add Citadel Securities to their Investor Pipeline to track the conversation.