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Peter H. Lieberman is Co-Chair of the Global Corporate Practice. He has more than 30 years of broad experience in mergers and acquisitions, private equity, public company and hedge fund transactions, start-up and venture capital financings, and complex securities trading and structuring matters. Throughout his career, Peter has been involved in advising boards of directors, special committees, and controlling interest holders on conflict, governance, change of control, and similar matters. Peter brings to his work a diverse transactional background and trained at the New York law firm of Wachtell, Lipton, Rosen & Katz, where he was involved in both hostile and negotiated transactions (including proxy contests and the implementation of takeover defenses). According to the 2022 edition of Chambers USA, sources say Peter is “an extraordinary attorney” and “simply amongst the finest attorneys and providers of legal and commercial judgment I have ever worked with” who provides “the highest levels of sophistication, service, and commercial awareness.”


  • Mergers and acquisitions
  • Private equity
  • Hedge fund (including PIPE) transactions and securities trading and hedging compliance
  • Corporate and securities matters and structuring



Peter regularly represents private equity funds, such as Arlington Capital Partners, Brentwood Associates, Clearlake Capital Group, L.P., LongRange Capital, Rotunda Capital Partners LLC, Vista Equity Partners, and Washington Equity Partners. Representative matters include:

  • Represented Arlington Capital Partners:
    • in its acquisition and subsequent sale of Micron Technologies, a leading global provider of particle size engineering technologies for bioavailability enhancement of pharmaceuticals.
    • in its acquisition of Ontario Systems, a market leading provider of revenue cycle management (RCM) software and solutions to health care providers, outsourced RCM and accounts receivable management firms, and government clients.
  • Represented Brentwood Associates:
    • in its acquisition, and subsequent sale, of iconic American shoemaker Allen Edmonds Corporation.
    • in its acquisition, and subsequent sale, of Sundance Holdings Group, LLC, a leading multichannel direct marketer and specialty retailer of women's apparel and accessories.
  • Represented Clearlake Capital Group, L.P.:
    • in its equity investment in EagleView Technologies, the leading provider of aerial imagery and property data analytics.
  • Representing LongRange Capital:
    • in its acquisition of Batesville Casket Company, a leading provider of quality death care products and services as well as innovative technology solutions.
  • Represented Rotunda Capital Partners LLC:
    • in its investment in StreetShares Inc., a leading provider of small business loans and government contract financing for businesses owned by members of the military and veterans’ community.
    • in the acquisition of IF&P Foods, a leading distributor of fresh fruits, vegetables, and other essential produce items to grocers and retailers in more than 14 Midwestern states.
  • Represented Vista Equity Partners:
    • in the combination of Superion, TriTech, and the public sector and health care business of Aptean, creating one of the largest providers of software solutions serving governmental agencies across North America.
    • in connection with Vista’s investment of new capital into PowerSchool Group LLC, the leading educational technology platform for K-12 schools, in connection with Onex Corporation’s acquisition of a stake in PowerSchool from Vista.
  • Represented Washington Equity Partners:
    • in its investment in Arc Drilling, LLC, a provider of electrical discharge machining solutions to the industrial gas turbine and aerospace engine markets.
  • Represented MidCap Financial in its formation transaction with affiliates of leading private equity funds, and then its subsequent acquisition by an entity managed by Apollo Global Management, LLC, a leading global investment manager.
  • Represented Founders Brewing Co., one of the nation’s leading craft brewers, in its partnership with, and 30 percent minority investment by, Mahou San Miguel, Spain’s leading brewer for 125 years and which is 100 percent family owned.
  • Represented Jarden Corporation in its acquisition of Yankee Candle Company, the leading scented-candle maker which owns and operates more than 560 retail stores in the U.S. and Canada and sells its products in over 35,000 retail locations.
  • Key member of hedge fund investor representation team that handled approximately 350 PIPE and similar transactions from 2004 to 2014.
  • Represented certain members of senior management of DoubleClick in the buyout of the Company by leading PE firm Hellman & Friedman, and in subsequent relationship with Google following its acquisition of DoubleClick.

Recognition & Leadership

  • Listed, The Best Lawyers in America, Mergers and Acquisitions Law, 2007-2024
  • Listed, Leading Lawyers Network, 2005-2023
  • Listed, Chambers USA Guide, 2010-2023
  • Listed, IFLR1000, "Highly Regarded," Private Equity and M&A, 2020-2023
  • Listed, The Legal 500 United States, 2016, 2018, and 2020
  • Listed, Super Lawyers magazine, Illinois Super Lawyers, 2006-2010, 2014-2018
  • Team Member, Corporate Board Member magazine and FTI Consulting Inc., one of "America’s Best Corporate Law Firms," 13th Annual Legal Industry Study, 2013
  • Member, Winning Team, Global M&A Network’s Turnaround Atlas Award for “Private Equity Turnaround of the Year” for the Chapter 11 reorganization and acquisition of American Laser Skincare LLC, 2012
  • Selected, Winning Deal Team - Distressed M&A Deal of the Year (Over $100mm), 2011 Turnaround Awards, The M&A Advisor, 2011
  • Listed, "Forty Under Forty," Crain's Chicago Business, 2000
  • Former Adjunct Professor, Northwestern University School of Law


  • J.D., cum laude, Harvard Law School, 1988
    • Editor, Harvard Law Review
  • Master's in Public Policy, Harvard University, John F. Kennedy School of Government, 1988
  • A.B., University of Michigan, 1984
    • Phi Beta Kappa
    • Angell Scholar
  • Illinois
  • New York