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Cravath Publishes Summer 2026 Issue of Alumni Journal

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News & Insights

Biogen’s $5.6 Billion Acquisition of Apellis

March 31, 2026

On March 31, 2026, Biogen Inc. and Apellis Pharmaceuticals, Inc. announced that the companies have entered into a definitive agreement under which Biogen has agreed to acquire all outstanding shares of Apellis for $41.00 per share in cash at closing, or approximately $5.6 billion. Apellis stockholders will also receive a nontransferable CVR for each Apellis share held, entitling the holder to receive two payments of $2 per share each, contingent on certain annual global net sales thresholds being met for SYFOVRE®. Cravath is representing Biogen in connection with the transaction.

The Cravath team is led by partners Aaron M. Gruber and Ryan J. Wichtowski and includes associates Gene Choi, Elise Zhou, Jerry A. Zhu, Jessica Early, Rohan Sagar Naik and Joel K. Adu‑Quaye on M&A matters; of counsel Kathryn‑Ann Stamm and associates M. Noa Ma and Sarah R. Brathwaite on intellectual property matters; partner Jonathan J. Katz, senior attorney Aaron S. Cha and associate Matthew S. Johnson on executive compensation and benefits matters; partner Lauren Angelilli and associate Frederick Schemel on tax matters; partner Margaret T. Segall and associate Lavinia M. Hecht on antitrust matters; and partner Matthew Morreale, of counsels Annmarie M. Terraciano and Joyce Law and senior attorney Lauren Piechocki on environmental and real estate matters. Crawford Rundlett also worked on M&A matters, and Yasmeen Shrestha worked on tax matters.

Related Practices & Industries

  • Corporate
  • Mergers and Acquisitions
  • IP and Strategic Tech Transactions
  • Executive Compensation and Benefits
  • Tax
  • Antitrust
  • Environmental
  • Healthcare and Life Sciences

People

Photo
Name
Aaron M. Gruber
Title
Corporate
Title
Partner
Email
agruber@cravath.com
Phone
+1-212-474-1456
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    Education

    • J.D., 2007, Stanford Law School
      Order of the Coif
    • M.Phil., 2004, University of Cambridge
      Gates Cambridge Scholar
    • B.S., 2003, Yale College
      summa cum laude

    Admitted In

    • New York
    Photo
    Name
    Ryan J. Wichtowski
    Title
    Corporate
    Title
    Partner
    Email
    rwichtowski@cravath.com
    Phone
    +1-212-474-1507
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      Education

      • J.D., 2018, Duke Law School
        cum laude
      • B.S., 2015, Fordham University
        summa cum laude

      Admitted In

      • New York
      Photo
      Name
      Jonathan J. Katz
      Title
      Executive Compensation and Benefits
      Title
      Partner
      Email
      jkatz@cravath.com
      Phone
      +1-212-474-1538
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        Education

        • LL.M., 2013, New York University School of Law
        • J.D., 2007, Benjamin N. Cardozo School of Law
          Order of the Coif, Dean's Distinguished Scholar, summa cum laude
        • B.S., 2003, Cornell University

        Admitted In

        • New York
        Name
        Lauren Angelilli
        Title
        Tax
        Title
        Partner
        Email
        langelilli@cravath.com
        Phone
        +1-212-474-1016
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          Education

          • J.D., 2000, Harvard Law School
            cum laude
          • B.S., 1996, The Wharton School of the University of Pennsylvania
            magna cum laude

          Admitted In

          • New York
          Photo
          Name
          Margaret T. Segall
          Title
          Litigation
          Title
          Partner
          Email
          msegall@cravath.com
          Phone
          +1-212-474-1231
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            Education

            • J.D., 2008, Harvard Law School
              cum laude
            • A.B., 2003, Harvard College
              magna cum laude

            Admitted In

            • New York
            Photo
            Name
            Matthew Morreale
            Title
            Corporate
            Title
            Partner
            Email
            mmorreale@cravath.com
            Phone
            +1-212-474-1534
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              Education

              • J.D., 1997, Columbia Law School
                Harlan Fiske Stone Scholar
              • M.S., 1994, University of Pennsylvania
              • B.A., 1990, University of Pennsylvania
              • B.A.S., 1990, University of Pennsylvania

              Admitted In

              • New York
              Photo
              Name
              Kathryn-Ann Stamm
              Title
              Corporate
              Title
              Of Counsel
              Email
              kstamm@cravath.com
              Phone
              +1-212-474-1979
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                Education

                • J.D., 2016, Cornell Law School
                • LL.M., 2016, City University of Hong Kong
                • Master II, 2016, University Paris 1 Pantheon-Sorbonne
                • Master I, 2013, University Paris 1 Pantheon-Sorbonne
                • LL.B., 2013, University Paris 1 Pantheon-Sorbonne
                • LL.B., 2013, King's College London
                  First Class Honors.

                Admitted In

                • New York
                Photo
                Name
                Aaron S. Cha
                Title
                Executive Compensation and Benefits
                Title
                Of Counsel
                Email
                acha@cravath.com
                Phone
                +1-212-474-1944
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                  Education

                  • LL.M., 2013, New York University School of Law
                  • J.D., 2012, Loyola Law School Los Angeles
                  • B.S., 2004, University of California, San Diego

                  Admitted In

                  • New York
                  • California
                  Photo
                  Name
                  Annmarie M. Terraciano
                  Title
                  Corporate
                  Title
                  Of Counsel
                  Email
                  aterraciano@cravath.com
                  Phone
                  +1-212-474-1366
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                    Education

                    • J.D., 1998, Columbia Law School
                      Harlan Fiske Stone Scholar
                    • M.S., 1994, University of Wisconsin - Madison
                    • B.A., 1989, Wellesley College
                      cum laude

                    Admitted In

                    • New York
                    Photo
                    Name
                    Joyce Law
                    Title
                    Corporate
                    Title
                    Of Counsel
                    Email
                    jlaw@cravath.com
                    Phone
                    +1-212-474-1066
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                      Education

                      • J.D., 1997, Boston University School of Law
                      • B.Comm., 1994, University of Alberta
                        Distinction

                      Admitted In

                      • New York
                      Name
                      Lauren Piechocki
                      Title
                      Corporate
                      Title
                      Practice Area Attorney
                      Email
                      lpiechocki@cravath.com
                      Phone
                      +1-212-474-1875
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                        Education

                        • J.D., 2012, Hofstra University School of Law
                        • B.A., 2005, Syracuse University
                          Dean's Scholar Maxwell Citizen Education Conference Scholar, cum laude

                        Admitted In

                        • New York

                        Related News & Insights

                        Deals & Cases

                        August 31, 2026

                        Aon’s $17 Billion Acquisition of USI

                        On August 31, 2026, Aon, a leading global professional services firm, announced the signing of a definitive agreement to acquire USI, a leading provider of property & casualty, employee benefit, personal risk and retirement solutions for the middle market and the tenth largest U.S. insurance broker, from KKR and other shareholders for a total purchase price of $17 billion. Aon expects to fund the transaction, as well as related transaction expenses and other costs, with new debt raised across a range of maturities, subject to market conditions. The transaction has been unanimously approved by the Board of Directors of Aon and the Board of Directors of USI. Cravath is representing Aon in connection with the transaction.

                        Deals & Cases

                        March 09, 2026

                        Talkspace’s Acquisition by UHS

                        On March 9, 2026, Universal Health Services, Inc. (“UHS”) announced that it has entered into a definitive agreement to acquire Talkspace, Inc. (“Talkspace”) for $5.25 per share. The enterprise value for the transaction is approximately $835 million. Cravath is representing Talkspace in connection with the transaction.

                        Deals & Cases

                        February 18, 2026

                        Tenax’s Merger with Air

                        On February 17, 2026, Tenax Aerospace Acquisition, LLC (“Tenax”) and Air Industries Group (“Air”) jointly announced that they have entered into an Agreement and Plan of Merger to combine Tenax’s special mission aviation business with Air’s precision aerospace manufacturing business. At the time of the merger, Air will issue shares of its common stock to holders of Tenax membership units. After the closing, Tenax shareholders are expected to own approximately 95% of Air’s outstanding shares while existing Air shareholders are expected to own approximately 5%, and the combined company expects to remain listed on the NYSE American under the symbol AIRI. Cravath is representing Tenax in connection with the transaction.

                        Deals & Cases

                        February 17, 2026

                        Kennedy Wilson’s Acquisition by Consortium Led by William McMorrow and Fairfax

                        On February 17, 2026, Kennedy‑Wilson Holdings, Inc. (“Kennedy Wilson”) and Fairfax Financial Holdings Limited (“Fairfax”) jointly announced that Kennedy Wilson has entered into a definitive agreement to be acquired, in an all cash‑transaction, by an entity affiliated with a consortium led by William McMorrow, Chairman and Chief Executive Officer of Kennedy Wilson, and certain other senior executives of Kennedy Wilson (collectively, the “KW Management Group”), together with Fairfax (collectively, the “Consortium”).

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