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Citadel Securities

Leader

Citadel Securities is one of the world's largest market makers, executing ~25% of US equity volume daily; received a $1.15B investment from Sequoia and Paradigm in 2022 at a $22B valuation;

Best for: Market Making & Equity TradingMarket leader
Financial ServicesMarket Making & Equity TradingWebsiteUpdated May 2026

Company Overview

About Citadel Securities

Citadel Securities is a leading global market maker and financial services firm founded by Kenneth Griffin and headquartered in Miami, Florida. The company is distinct from the Citadel hedge fund — Citadel Securities operates as a separate entity focused on providing liquidity and executing trades for retail brokers, institutional investors, banks, and exchanges across equities, fixed income, options, and currencies. As a market maker, Citadel Securities continuously quotes bid and ask prices across thousands of securities, enabling fast and efficient trade execution for market participants at scale.

Business Model & Competitive Advantage

In January 2022, Citadel Securities received a landmark $1.15 billion strategic investment from Sequoia Capital and Paradigm, valuing the firm at $22 billion. This was one of the largest private market investments in a financial services company. Citadel Securities is estimated to execute approximately 25% of total US equity volume on a daily basis, handling trades for retail investors who route orders through major brokers including Robinhood, TD Ameritrade, and Schwab. The company also has significant global fixed-income market-making operations, providing liquidity in government bonds and other debt securities.

Competitive Landscape 2025–2026

Citadel Securities invests heavily in quantitative research and technology infrastructure — employing hundreds of quantitative researchers, software engineers, and traders — to maintain competitive pricing and execution quality at high speed and scale. The firm has been a key participant in market structure debates, advocating for policies it believes improve retail investor outcomes. Citadel Securities operates offices in New York, Chicago, London, Dublin, Hong Kong, Singapore, and other financial centers globally.

Headquarters
Miami, Florida
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Key Differentiators

Market Leader

Citadel Securities is recognized as a market leader in the Financial Services sector, demonstrating strong industry presence and customer trust.

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