
Corporate M&A
Private Equity
Corporate Governance
Steven A. Seidman is a partner and Co-Chair of the Corporate & Financial Services Department at Willkie Farr & Gallagher in New York City. With a focus on corporate governance, mergers and acquisitions, private equity, and securities law, Steven is recognized as a leading figure in Corporate/M&A Law. His notable achievements include advising on high-profile deals such as the $11.6 billion acquisition of Alleghany Corporation by Berkshire Hathaway. Steven's expertise and leadership have earned him accolades from Chambers USA and The American Lawyer, highlighting his significant contributions to the legal field.
Mergers and Acquisitions
Private Equity
Financial Advisor Representations
Corporate and Governance Disputes

- Atlas Holdings acquired the target/assets from The ODP Corporation in a take-private acquisition on not available. - Deal value was 1000000000 Sector: Business Services; Location: USA. - On the acquirer side, not available advised, led by Brittany Klinger, Laura Acker, Mark Cognetti, Steven Seidman.
Sep 22 2025
1B
Private Equity

Partner
2017 – Unknown
Attorney
2011 – 2017

Of Counsel
2004 – 2011


- Atlas Holdings acquired the target/assets from EVRAZ Inc. NA and EVRAZ Inc. NA Canada in an acquisition. - Deal value was 4600000000 Sector: Steel; Location: USA. - On the acquirer side, legal advice was provided by a team including Steven Seidman, Mark Cognetti, Brittany Klinger, Laura Acker, Joshua Deason, Jonathan Zane, Vadim Mahmoudov, David Drewes, David Mortlock, Simon Osborn-King, Mark Holdsworth, Sarah Haddy, Genevieve Dorment, David Levine, William Thomas, Daniela Abadi, Joshua Wexler, Alton Martin, Ji Hoon Suk.
Aug 05 2025
5B
Private Equity
1 min
Associate Counsel
2001 – 2003