Greenberg Traurig expands finance practice with Ethan Buttner
Greenberg Traurig, LLP appointed Ethan R. Buttner as of counsel in its New Jersey office to bolster its Finance Practice. Buttner, formerly Senior Vice President and Counsel at The Bank of New York Mellon, brings expertise in regulatory compliance, asset servicing, and litigation. His addition aims to enhance the firm's advisory capabilities for financial institutions.

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Global law firm Greenberg Traurig, LLP has strengthened its Finance Practice in New Jersey with the appointment of Ethan R. Buttner as of counsel. The addition aims to enhance the firm's ability to advise financial institutions on complex commercial matters, regulatory compliance, and asset servicing transactions. Buttner brings extensive experience from his previous role as Senior Vice President and Counsel – Asset Servicing at The Bank of New York Mellon (BNY).
Buttner represents major financial institutions in complex commercial matters, regulatory compliance, and asset servicing transactions. His practice focuses on advising on custody, fund accounting and administration, transfer agency services for registered investment companies and exchange-traded products, and middle-office operational transactions. Prior to joining Greenberg Traurig, he defended financial institutions in state, federal, and bankruptcy courts across New York and New Jersey, handling individual and class action lawsuits involving consumer financial products.
During his tenure at BNY, Buttner negotiated complex commercial contracts across multiple business segments and supported mergers and acquisitions. His responsibilities included due diligence reviews, purchase agreement negotiations, and the development of form agreements for various service lines. He also contributed to the launch of digital asset services.
Greenberg Traurig New Jersey Co-Managing Shareholders David Jay and David W. Oppenheim stated that Buttner's blend of in-house, transactional, and litigation experience will further strengthen the firm's advisory capabilities. They highlighted his practical perspective on commercial arrangements, regulatory and asset servicing work, and litigation involving financial products.
Buttner expressed his goal to complement Greenberg Traurig's team with his experience in asset servicing, regulatory, and transactional work. He looks forward to collaborating with financial-services-focused attorneys, including Nathan Iacovino, to enhance support for financial institutions. Buttner earned his J.D. from Seton Hall University School of Law and dual B.A. degrees in political science and history from Rowan University.
About Greenberg Traurig, LLP
Greenberg Traurig, LLP has approximately 3,100 lawyers across 51 locations in the United States, Europe, the Middle East, Latin America, and Asia. The firm is recognized as a 2025 BTI "Best of the Best Recommended Law Firm" and is consistently ranked among the top firms on the Am Law Global 100, NLJ 500, and Law360 400.
How might Buttner's experience in digital asset services influence Greenberg Traurig's future strategy in the evolving fintech and cryptocurrency sectors?
Could this appointment signal a broader trend of law firms recruiting in-house counsel to better navigate complex regulatory environments for financial institutions?
What impact will Buttner's litigation and compliance background have on the firm's ability to defend clients in high-stakes financial lawsuits?

























