Mr. O’Connor has over 30 years of experience in global financial markets, with unique expertise in prime brokerage, inventory management, securities lending, repo, asset-based financing, and liquidity and counterparty risk management. His career spans senior leadership roles at major investment banks and asset managers across North America, Europe, and Asia.
At Aperture Investors, Mr. O’Connor served as President, following his tenure as Chief Operating Officer. In these roles, he oversaw all non-investment functions of the firm, including Trading, Operations, Finance, Risk, Legal, Compliance, and Technology, and played a key role in transforming Aperture from a traditional long-only asset manager into an alternative asset management platform.
Previously, at Och-Ziff Capital Management, Mr. O’Connor established and led the Portfolio Finance team, a new business unit designed to optimize the firm’s capital usage and financing strategies across multiple funds. Under his leadership, the team developed and implemented four low-risk portfolio finance trading strategies that collectively generated over $300 million in profit for fund investors. He was also responsible for managing and negotiating with over nine global prime brokerage relationships and for conducting due diligence on new custodial and prime brokerage counterparties.
Earlier in his career, Mr. O’Connor was a Managing Director at Goldman Sachs in London, where he served as European Head of Securities Lending and Co-Head of Prime Brokerage, managing a team of over 100 professionals and achieving average annual revenue growth of 35%. He also held senior treasury and securities finance roles in Asia at Bankers Trust, where he led the regional Securities Finance business, and at PaineWebber, where he worked as a Trader within the Securities Lending division in New York and Hong Kong.
Mr. O’Connor earned a Bachelor of Science in International Studies from the University of Scranton. He also completed a year of study abroad at Sophia University in Tokyo, focusing on general and international studies.
EXPERTISE
Prime Brokerage
Securities Lending & Repo Markets
Treasury Operations
Liquidity and Counterparty Risk Management
Inventory Management and Asset Financing
EDUCATION
University of Scranton
B.S. International/Global Studies
Sophia University
Study Abroad, General Studies
WORK HISTORY
SEDA Experts
Senior Advisor
2025-Current
Generali Investments Holdings
Corporate Development Strategic Advisor
2025-Current
Aperture Investors LLC, New York
President, Chief Operating Officer
2018-2025
Och-Ziff Capital Management, New York
Head of Business Management, Head of Portfolio Finance
2003-2018
Goldman Sachs, London
Managing Director, Global Securities Services, European Head of Securities Lending and Co-Head of Prime Brokerage
1999-2003
Bankers Trust, Hong Kong & Singapore
Principal, Global Treasury Group, Head of Securities Finance (Asia)
1994-1999
PaineWebber, New York & Hong Kong
Trader, Securities Lending
1993-1994
Prime Brokerage and Treasury Operations Expert Witness
Contact
James O'Connor
1185 Avenue of the Americas
New York, NY 10036
+1 646-626-4555


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