About Us

Founded in 2018, Defiance stands as a leading ETF sponsor dedicated to income and thematic investing. Our actively managed options ETFs are designed to enhance income while our suite of first-mover thematic ETFs empower investors to express targeted views on dynamic sectors leading the way in disruptive innovations, including artificial intelligence, machine learning, quantum computing, 5G, and hydrogen energy.

Executive Team

Sylvia Jablonski

Chief Executive Officer & CIO, Defiance ETFs

Sylvia Jablonski is the Chief Executive Officer and Chief Investment Officer of Defiance ETFs. Sylvia is a pioneer in the ETF industry and a top expert recognized for her market expertise on television and radio, including CNBC, Bloomberg, Fox, WSJ, Barron’s, Yahoo and Forbes to name a few. Sylvia manages Defiance‘s investment outlook, capital markets, and product development. Prior to joining Defiance Sylvia was Managing Director at Direxion.

Matthew Bielski

Chairman of Defiance

Matthew is the Chairman and founder of Defiance Holdings. Matthew is responsible for driving Defiance’s overall company strategy. Before founding Defiance, Matthew was a Senior Vice President at Direxion ETFs. Prior to that, Matthew served as an Investment Management Associate at BlackRock and as a Portfolio Analyst at ProShares.

David Hanono

Chief Financial Officer & Chief Compliance Officer, Defiance ETFs

David is responsible for managing Defiance’s compliance program and capital markets operations. Previous to acting as CCO David held multiple roles at Defiance including Director of Operations and as an ETF specialist covering RIAs. Prior to joining Defiance, David was a Senior Financial Analyst at Sony Music. David currently holds the Series 7, 24, and 63 licenses.

Gabriella Zahn

General Counsel

Gabriella Zahn serves as Defiance’s General Counsel. Prior to joining Defiance, Gabriella was a corporate attorney at Covington and Burling LLP with a practice  including restructuring, finance and M&A transactions. Gabriella advised both corporate and institutional clients, representing some of the largest financial institutions. Prior to practicing at a law firm, Gabriella served as law clerk to the Chief Judge of the New York Court of Appeals.

Our Partners.