William M. Hartnett


212.701.3847 Phone

Cahill Gordon & Reindel LLP
32 Old Slip
New York, NY 10005vCard



  • Rider University, B.A., 1976, cum laude
  • Fordham University School of Law, J.D., 1979, cum laude
  • Admission

    • New York

William M. Hartnett is chairman of the Executive Committee and has been a partner at Cahill Gordon & Reindel LLP since 1986.

For over thirty years, Bill has advised leading commercial and investment banking firms and public and private companies in a broad range of domestic and cross-border capital markets and lending transactions, including leveraged bank financings, out-of-court restructurings, mergers, acquisitions and debt and equity-linked securities offerings.

Bill serves as outside corporate counsel to a number of public and private companies and has extensive experience representing special committees of the boards of directors of public companies including WebMD, Scottish Re and Chrysler LLC in connection with strategic transactions and related compliance matters.

Bill also advises companies on acquisitions, divestitures, joint ventures and related financings.  He has notable experience with companies in many industries, particularly in media, pharmaceuticals, telecommunications, technology and gaming.

Since his representation of the financing sources in the historic buyout of RJR Nabisco in 1989, Bill has been at the forefront of emerging financing structures for many prominent domestic and international financing transactions such as the buyouts of Dell, Nielsen, SunGard, HCA, Harrah's and First Data. He is consistently named among the top lawyers globally and nationally for capital markets and banking transactions by a variety of industry publications including: Chambers Global, Chambers USA, the IFLR 1000: Guide to the World's Leading Financial Law Firms, The Legal 500, Lawdragon, Who’s Who Legal and Global Counsel. In 2010, Bill was the recipient of the Leonard F. Manning Achievement Award from Fordham Law Review.  

Bill joined Cahill following his graduation in 1979 from Fordham Law School, cum laude, where he was a member of the Fordham Law Review. He earned his undergraduate degree at Rider University in 1976, cum laude.