Sean Flynn

Part of IBG Holdings LLC, Interactive Brokers LLC is a brokerage company. The company is based in Greenwich, CT. The CEO of the company is Milan Galik.

IBG LLC provides investment and security services. Its products and services include product listings, exchange listings, new products page lists, contract search, portfolio analysis, trading and expirations calendar, trading products, account management and services. The company is headquartered in Greenwich, CT.

Interactive Brokers (U.K.) Ltd. engages in buying and selling commodity contracts. The company is headquartered in London, the United Kingdom.

Founded in 1996, Timber Hill LLC is an SEC-registered broker/dealer located in Greenwich, Connecticut. The firm provides trade clearing and trade settlement services. Their products include equity and index options

Virtu Financial LLC operates as an electronic market making firm which provides offers to buy and sell a security or other financial product. The firm is a market maker across all financial centers including equities, fixed income, currencies, futures, energy products and other commodities. The company was founded by Vincent Viola and Douglas A. Cifu in 2008 and is headquartered in New York, NY.

The Options Clearing Corp. provides equity derivatives clearing services. It provides central counterparty clearing and settlement services to stock exchanges and trading platforms for options, financial futures, security futures and securities lending transactions. The company was founded in 1973 and is headquartered in Chicago, IL.

NYSE Euronext operates financial markets and provides trading solutions. It offers an array of products and services in cash equities, futures, options, swaps, exchange-traded products, bonds, clearing operations, market data, commercial technology solutions and carbon trading, all designed to meet the evolving needs of investors, issuers, financial institutions and market participants. The company was founded by Jean-François Théodore in 2007 and is headquartered in New York, NY.

Cboe Exchange, Inc. provides options exchange services. It trades equity options, security index options, options on exchange traded notes and products, binary options, one-week and quarterly options, long-term equity anticipation securities options, and flexible exchange options. The firm also provides information on various stock and options trading strategies, options trading tools, stock and option quotes and data; and options information and education. Additionally, they offer access to product information, conference notices, portfolio management tools, and educational materials for institutional investors and products and strategies for advisors to protect client’s portfolios. The company was founded in 1973 and is headquartered in Chicago, IL.

NYSE Chicago, Inc. offers technology based national securities exchange services. It provides business to transact in all equity securities traded on NYSE, AMEX, NASDAQ, or other national securities exchanges. CHX acts as a venue for hedge funds, options market markers, quantitative, professional and active individual traders that require immediate and automated execution. The firm provides services through its technology products including CHXBD, CHX SHARE and SNAP. The company was founded in 1882 and is headquartered in Chicago, IL.

The Big Shoulders Fund provides financial services. The company was founded by James J. O'Connor, Joseph Cardinal Bernardin and Fred O'Connor in 1986 and is headquartered in Chicago, IL.

Ryan Specialty Group LLC engages in the provision of brokerage, underwriting and insurance services. Its products and services include allied healthcare, alternative energy, commercial property, cargo, distribution and claim management, oil and gas exploration, tax insurance and wind and earthquake buybacks. The firm offers property, casualty, transportation and professional liability risks. The company was founded by Patrick G. Ryan, Sr. in 2010 and is headquartered in Chicago, IL.

Chicago's Museum of Science and Industry operates as a museum. It conduct exhibitions in the fields of science, technology, engineering and medicine. The company was founded in 1893 and is headquartered in Chicago, IL.

Part of MF Global Holdings Ltd., RB&H Financial Services LP operates a commodity and financial futures clearing and brokerage firm. The company is based in Chicago, IL. RB&H Financial Services was acquired by Refco LLC, part of MF Global Holdings Ltd. from November 10, 2005 on October 30, 2003.

National Futures Association is a self-regulatory organization for the derivatives industry. The non-profit company is based in Chicago, IL. The company's focus is on providing innovative and effective regulatory programs. The company was founded by Leonid Adolfovich Melamed.

Lyric Opera of Chicago provides live theatrical presentations. The company was founded by Carol Fox, Nicola Rescigno and Lawrence V. Kelly in 1954 and is headquartered in Chicago, IL.

The Shedd Aquarium Society is a leader in animal care, conservation education, and research. The non-profit company is based in Chicago, IL and is supported by the people of the state and the park district. The company is home to 32,000 aquatic animals from around the world, representing 1,500 species of fishes, reptiles, amphibians, invertebrates, birds, and mammals. The company is an accredited member of the Association of Zoos & Aquariums (AZA) and an affiliate of the Smithsonian Institute. The John G. Shedd Aquarium sparks compassion, curiosity, and conservation for the aquatic animal world.

Rush University Medical Center engages in the provision of health care services. The company was founded in 1972 and is headquartered in Chicago, IL.

Merrick Ventures LLC (Merrick Ventures ) is a private equity firm founded in 2007 by Michael W. Ferro. The firm is headquartered in Chicago, Illinois.

Dubai Mercantile Exchange Ltd. operates a commodities exchange. It focuses on developing and trading of crude oil futures contract for various energy market participants, such as energy producers, refiners, traders, and financial institutions. The company was founded in June 2007 and is headquartered in Dubai, United Arab Emirates.

Click Commerce, Inc. provides business application software and related services. The company was founded by Gary Whitney and Jim Heising in 1996 and is headquartered in Beaverton, OR.