Built on relationships. Powered by technology.

Our Firm


Since 1998

For 20 years, Brownstone Investment Group has built a reputation as a trusted trading partner, liquidity provider, and pioneer of electronic trading technology within all asset classes. We actively value and trade millions of unique securities with counterparties of all shapes and sizes – from the smallest local investment advisers to the largest global asset managers.

An established, trusted trading partner.



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Douglas Lowey

Founding Principal, President & Chief Executive Officer

Mr. Lowey is a Founding Principal of Brownstone Investment Group, LLC and serves as its President and CEO. He directly oversees the firm’s Capital Strategies Group, which invests proprietary capital for the firm and its investors.

Mr. Lowey was also a Founding Partner of Brownstone Asset Management, LP, an asset management company whose hedge funds invest within the high yield and distressed fixed income markets. Prior to launching Brownstone in 1998, Mr. Lowey created and ran the high yield dealer trading desk at Bear Stearns & Co. He began his career at Mabon Securities, Inc. where he held various positions from 1988 through 1994, including high yield trader and Director in charge of its high yield department.

Mr. Lowey earned a B.A. in Political Science from Duke University and remains active with the school, serving on Duke’s Trinity Board of Visitors.



Jon Sablowsky

Partner, Head of Trading

Mr. Sablowsky joined Brownstone in 2004 and oversees Brownstone’s fixed income trading operations.

Prior to joining Brownstone, Mr. Sablowsky organized and led the high yield sales and trading effort at Maxcor Financial. Mr. Sablowsky founded the high yield debt department at Spear, Leeds & Kellogg, which he ran from 2001-2004. He began the high yield debt trading desk at Pershing, LLC., and ran it from 1996-2001. Mr. Sablowsky started his career at Gruntal & Co., Inc. where he both ran the retail corporate bond department and managed the high yield debt trading desk from 1985-1996.

Mr. Sablowsky received a B.A. from Ohio State University.

Anthony McDevitt

Partner, Head of Sales

Mr. McDevitt joined Brownstone in 2015 serves as Head of Structured Products and Head of Institutional Sales.

Prior to joining Brownstone, Mr. McDevitt spent six years as a Managing Director at CapRok Capital, where he actively traded Structured Products and HY/IG corporate bonds. Mr. McDevitt started his career at Bank of America Merrill Lynch.

Mr. McDevitt received a B.A. in Economics and M.B.A. in Finance and Financial Management from Duke University’s Fuqua School of Business. Mr. McDevitt serves on Duke's Board of Athletics and he is a former collegiate and professional lacrosse player.


Barret Naylor

Founder Emeritus


Seth Platt

Chief Operating Officer

Joanne Bartmess

Chief Financial Officer


Michelle Halla Hunter

Chief Compliance Officer

David Dinner

Chief Technology Officer