+ Irvin Kessler – Founding Partner
Mr. Kessler is primarily involved in setting the strategic direction of the firm.
Prior to co-founding Walleye in 2005 and founding Provident Advisors LLC in 2002, Mr. Kessler was CEO and CIO of Deephaven Capital Management, a multi-strategy hedge fund he co-founded in 1994. Mr. Kessler founded and co-founded several other companies in the past. In 1995, he co-founded Arbitrade, a global market maker in exchange traded derivatives. When Arbitrade and Deephaven were sold to Knight Trading Group in 2000, Mr. Kessler joined Knight’s executive oversight committee.
Mr. Kessler also co-founded Kessler-Asher Group in 1986, a firm that offered clearing, training, and financial backing to professional traders. The firm was sold to Spear, Leeds & Kellogg in 1998. He also founded Provident Real Estate Advisors to invest in distressed real estate. PREA began purchasing and managing single family homes for rent in 2009. These portfolios morphed into a public REIT, Silver Bay Realty Trust Corp. (NYSE: SBY), of which Mr. Kessler was one of the founders and served as Chairman of the Board until its sale to another public company for $1.3B in 2017.
Mr. Kessler began his career as a floor trader in 1978, trading and making markets in equity and index options, treasuries, foreign exchange and grains on the CBOE, CBOT, and CME until 1990. He was elected to the Board of Directors of the CBOE and Cincinnati Stock Exchange in 1988.
+ Andrew Carney – Partner, Head of Trading, Chief Executive Officer
Mr. Carney has been with Walleye since 2006, and a partner since 2015. He has been an integral part of building the US options market making business since its inception. As a partner, Mr. Carney oversees all of Walleye’s trading operations and risk management.
Prior to joining Walleye, Mr. Carney was an Actuary at Willis Towers Watson.
Mr. Carney graduated Magna Cum Laude from Luther College with a B.A. in Mathematics and Statistics. Additionally, he is an Associate in the Society of Actuaries.
+ William England – Partner, Chief Investment Officer – Walleye Opportunities Fund
Mr. England joined Walleye in 2013 and became a partner in 2017. He serves as the Chief Investment Officer of the Walleye Opportunities Fund. As Chief Investment Officer, Mr. England oversees internal and external strategy allocations and is responsible for risk management for the Fund. As a partner, Mr. England is responsible for overseeing fundraising activities as well as identifying strategic opportunities.
Mr. England began his career as a Quantitative Researcher for the AHL division of London-based Man Group Plc, researching and implementing algorithmic trading strategies across global futures and equity instruments.
He earned a BSE in Operations Research and Financial Engineering from Princeton University (Academic All-Ivy honors) and a Master’s degree in Mathematical and Computational Finance from Oxford University. Throughout his time at Princeton and Oxford, Mr. England was an accomplished rower, appearing in multiple World Championships for the U.S. National Team and winning the Oxford-Cambridge Boat Race.
+ Mark Zeldis – Partner, Head of Technology
Mr. Zeldis has been with Walleye’s technology affiliate, Walleye Software, since 2005, and a partner since 2015. He has been instrumental in designing and developing Walleye’s competitive technology infrastructure as well as some of its trading strategies. As a partner, Mr. Zeldis continues to manage the infrastructure and support needs of the trading groups.
Prior to joining Walleye, Mr. Zeldis was Vice President at Lehman Brothers in Equities Technology. He was responsible for reengineering the company’s Position/PNL/Risk system and providing assistance in platform and logic development behind Lehman’s execution strategies. Early on in his career, Mr. Zeldis founded SeekImage. Here, he was able to invent and develop algorithms behind content based image retrieval and recognition on a large scale.
Mr. Zeldis graduated from Brown University with a B.S. in Computer Science.
+ Mark Lyons – Partner, Trader
Mr. Lyons is a Partner and founding member of Walleye. As a Partner, he has operational responsibility for monitoring and maintaining firm-wide risk levels and controls. He has been working with Mr. Kessler since 1984 and was also a Partner in Arbitrade.
Mr. Lyons was the head equity and index trader at Arbitrade from 1997 through 2005, as its ownership transferred to Knight and Citigroup, respectively. Mr. Lyons’ index group was in the top two in contract volume traded on the CBOE and the Chicago Mercantile Exchange for seven consecutive years.
Mr. Lyons originally was with Mr. Kessler as a trader with the Kessler Asher Group from 1984 to 1996 in Chicago on the CBOE, in New York on the Amex, and in Frankfurt Germany on the DTB.
+ Paul Mattson – Partner, Trader
Mr. Mattson joined Walleye in 2005 and became a Partner in 2017. Prior to joining Walleye, Mr. Mattson had spent more than five years working for Towers Watson (formerly Tower Perrin) where he worked as a consulting actuary for large pension plans.
Mr. Mattson graduated from the University of Minnesota with a B.S. in Mathematics and a B.S. in Economics. He is a CFA charterholder.
+ Mark Tusler – Partner, Chief Financial Officer
Mr. Tusler joined Walleye in 2005 and is responsible for accounting, finance, operations, tax and regulatory reporting requirements for each of the firm’s domestic and international entities.
Prior to joining Walleye, he had spent more than eight years in accounting capacities for multi-strategy hedge fund EBF & Associates, NRG Energy, and Ernst & Young.
Mr. Tusler graduated magna cum laude from University of Minnesota at Mankato with a B.S. in Accounting and Business Administration. He also earned a full scholarship to the University of Denver, where he received a Masters in Taxation.