Sean Ostrower is the Chief Financial Officer of AVAT, where he oversees the firm’s financial planning, reporting, governance, and finance operations.

Prior to joining Avalanche Treasury Company in March 2026, Sean served as Vice President, Global Head of Financial Planning & Analysis, Investor Relations, and Finance Operations at DriveWealth, a global fintech platform providing brokerage infrastructure and embedded investing solutions. In that role, he oversaw enterprise financial planning, investor communications, and finance operations, and was responsible for financial performance management, governance processes, and the company’s financial planning and reporting framework.

Previously, Sean served as Director and Global Head of Technology and Shared Services Finance at Tradeweb Markets, where he oversaw financial planning and reporting for technology and corporate functions during the company’s transition to public markets and subsequent public-company operations. Earlier in his career, he held finance and capital markets roles at Geller & Company, Barclays Capital, and Bank of America Merrill Lynch.

Sean received a B.B.A. in Finance from Hofstra University.