Thomas Mastoras

Thomas Mastoras


Tom represents leading investment and commercial banks, direct lenders, corporate borrowers, private equity sponsors, alternative capital providers, and other financial institutions on a range of domestic and cross-border debt financing matters.

He has extensive experience in public and private leveraged and investment grade financings, including acquisition and other event-driven financings, first and second lien credit facilities, holdco loans, bridge loans, direct and special situations lending, refinancings, working capital facilities, dividend recapitalizations, asset-based lending, distressed and opportunistic financings, and debt restructurings and workouts.

Prior to joining A&O Shearman, Tom worked in New York in the investment banking division at Goldman Sachs, and at another leading international law firm.


Representative matters

Several major financial institutions in connection with a large senior secured bridge loan to support a contemplated asset disposition by a public company.

A direct lender in connection with a private credit unitranche acquisition financing.

A direct lender in connection with a corporate carve-out from a public company.

A leading investment bank in connection with a syndicated financing in support of a bid by a private equity sponsor for a TMT business.

A leading investment bank in connection with a holdco financing for a sponsor-backed business.

A leading financial institution in connection with the U.S. regional banking crisis in 2023.

An infrastructure-focused private equity fund in connection with various acquisition financings.

Pro bono

Tom also strongly supports several pro bono clients at the firm, including leading organizations in support of American veterans.

Published Work

  • Chernick, Michael; Mastoras, Thomas (2023) “Getting the Deal Through: Loans & Secured Financing 2024 Global Overview”, London: Lexology
  • Chernick, Michael; Mastoras, Thomas (2023) “Getting the Deal Through: Loans & Secured Financing 2024 USA Chapter”, London: Lexology

Speaking Engagements

  • Co-moderator, Private Credit panel, 29th Annual LPC Middle Market, Direct Lending & Large Corporate Loans Conference, November 2023
  • Contributor, North America TMT Trendspotter: Where do we go from here?, Mergermarket, January 2023 



New York State (First Dept), 2014


B.A., Political Science, University of Toronto, 2009
J.D., Osgoode Hall Law School, York University, 2013
M.B.A., Schulich School of Business, York University, 2013
A&O Shearman was formed on May 1, 2024 by the combination of Shearman & Sterling LLP and Allen & Overy LLP and their respective affiliates (the legacy firms). Any matters referred to above may include matters undertaken by one or more of the legacy firms rather than A&O Shearman.