Citadel options internalisation

Citadel Securities sits at the center of U.S. retail options trading, and public routing reports show a large share of customer orders never reach a lit exchange book. (citadelsecurities.com) Under Securities and Exchange Commission Rule 606, brokers and dealers must publish quarterly reports showing where they route non-directed customer options orders. The rule covers listed options as a separate category from stocks and requires those reports to stay public for three years. (sec.gov) (ecfr.gov) Citadel’s own Rule 606 reports show Citadel Securities Institutional LLC routes all of its reportable customer orders to its affiliate, Citadel Securities LLC, and “does not otherwise route” those orders to any other market center or broker-dealer. The same filing says the affiliate reimburses Citadel Securities Institutional for trading and operating costs plus 10%. (finra.org) Other brokers’ Rule 606 reports show Citadel is one of several major destinations for retail options flow, but not the only one. Robinhood Financial’s fourth-quarter 2024 report listed Citadel Securities for 32.82% of its non-directed options orders, while Robinhood Securities’ second-quarter 2025 report listed Citadel at 10.30% and Jane Street and Virtu ahead of it. (sec.gov) (finra.org) Charles Schwab’s public Rule 606 reports for fourth-quarter 2024 and first-quarter 2025 show the firm routes listed options to multiple venues as well, with order-type breakdowns but no single venue dominating the entire category in the excerpts available from the report. Those reports underscore that the options market is fragmented across wholesalers and exchanges rather than concentrated in one pipe. (content.schwab.com 1) (content.schwab.com 2) In options, “internalization” usually means a market maker gets the first chance to execute a retail order within exchange rules instead of exposing that order to a fully competitive displayed market. Unlike off-exchange equity trading, listed options are still exchange-listed instruments, but exchange rules can still facilitate internalization by designated market makers and preferred counterparties. (nber.org) Academic and policy papers have focused on options because broker payments are larger there than in stocks. A Wharton Initiative paper by Thomas Ernst and Chester Spatt said roughly two-thirds of all payment for order flow comes from options markets, and the authors proposed fee caps and a more competitive auction process for options. (wifpr.wharton.upenn.edu) Those same authors found retail option routing can produce less price improvement and worse prices when brokers send orders to market makers that pay for that flow. Their National Bureau of Economic Research paper said current debate has focused on equities even though “option routing is comparatively worse.” (nber.org) Citadel rejects the idea that its scale weakens markets. On its options business page, the firm says its “broad connectivity” drives “deeper liquidity, stronger price discovery, and more resilient markets,” and says it executes more than 35% of total U.S. retail market volume across asset classes. (citadelsecurities.com) The immediate dispute is not whether internalization exists; Rule 606 filings show it plainly in options routing data. The fight is over whether first-look access by wholesalers improves execution for retail traders, or whether too much of the market’s information is being priced in private before it reaches the public quote. (finra.org) (wifpr.wharton.upenn.edu)