17 Jun 2026
Greenberg Traurig Expands New Jersey Finance Practice with Ethan R. Buttner
"Ethan R. Buttner joins Greenberg Traurig in New Jersey as of counsel in the Finance Practice, working on custody, fund accounting, transfer agency and asset servicing matters."
Buttner most recently served as Senior Vice President and Counsel – Asset Servicing at The Bank of New York Mellon (BNY). He represents major financial institutions in commercial matters, regulatory compliance, and asset servicing transactions. His practice includes advising on custody, fund accounting and administration, transfer agency services for registered investment companies and exchange-traded products, and middle-office operational transactions. At BNY, Buttner negotiated complex commercial contracts across multiple business segments, supported mergers and acquisitions including due diligence and purchase agreement negotiations, developed and maintained form agreements for various service lines, and contributed to the launch of digital asset services. Prior to joining Greenberg Traurig, he defended financial institutions in state, federal, and bankruptcy courts in New York and New Jersey, handling individual and class action lawsuits involving consumer financial products.
Greenberg Traurig New Jersey Co-Managing Shareholders David Jay and David W. Oppenheim said Buttner’s blend of in-house, transactional, and litigation experience will further strengthen the firm’s ability to advise financial institutions.