Rosenthal Collins Group, LLC (RCG) — Chicago-based futures commission merchant (FCM) founded in 1923 as Rosenthal & Co.; the RCG name dates to the 1988 merger of Rosenthal & Co. and Collins Commodities. Headquarters were at 216 W. Jackson Blvd., Chicago. It was a privately held firm, wholly owned by RCG Holdings, LLC (R.J. O'Brien's parent). In December 2018, Marex Spectron agreed to acquire RCG's customer business; the deal closed in February 2019, transferring ~14,000 client accounts, ~150 staff, and the Chicago headquarters to Marex Spectron (which retained the RCG brand). Some directory listings put headcount in the low hundreds.
Products / services — RCG was a regulated FCM registered with the CFTC and a member of the National Futures Association, holding clearing memberships on all principal U.S. futures exchanges plus ICE Futures Europe and FICC. It provided trade execution, clearing, brokerage, institutional foreign exchange, managed futures, structured products, and risk management to institutional, commercial, professional, and retail clients worldwide, supported by a network of 150+ introducing broker and correspondent relationships. It also developed a proprietary electronic trading platform, RCG Onyx Plus®, and offered market commentary and account management. It was an operating company, not a patent holder or licensor.
Patent-litigation posture — RCG appears twice in the database solely as a defendant, with zero plaintiff-side cases, consistent with an operating company targeted in infringement suits rather than an entity asserting patents. Both tracked suits were filed 3 December 2015 by Chart Trading Development, LLC in the U.S. District Court for the Eastern District of Texas, Tyler Division — a plaintiff-friendly venue.
Notable cases — Chart Trading Development, LLC v. CQG, Inc. et al. and Chart Trading Development, LLC v. NinjaTrader Group, LLC et al. Both named RCG alongside other defendants. The case caption and defendants (trading-software and brokerage firms) indicate the asserted patents relate to electronic trading/charting functionality, though specifics of the patents are not reflected in the case data provided. RCG's involvement reflects its role as an FCM whose electronic trading offerings were among the accused products. No other litigation appearances are tracked for the company.
Note: founding-year sources vary (1923 vs. 1992); employee and revenue figures could not be reliably verified from primary filings.