LAWYER PROFILE
Alan M. Klein

Alan M. Klein

USA 2026

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Ranked in 1 practice area

About

Provided by Simpson Thacher & Bartlett LLP

Practice Areas

Alan Klein is a Partner in the Firm's Mergers and Acquisitions Practice and has previously served as Global Co-Head of the Mergers and Acquisitions Practice. He represented the Board of Twitter in the company’s sale to Elon Musk. He has advised Microsoft on various transactions, including its acquisition of Activision Blizzard, LinkedIn and Skype, among others. He also represented ChemChina in its acquisition of Syngenta, the largest acquisition ever by a Chinese company; Tyco in its merger with Johnson Controls; and numerous other companies in cutting-edge transactions including Cisco, ADT, Best Buy, Wendy’s and Royal Ahold. He has also advised the boards of public companies including Aetna, Xerox, Yahoo and Baker Hughes, among others, on corporate governance matters.

Career

Joined, 1984; Partner, 1993.

Personal

BA, with Honors, Phi Beta Kappa, Haverford College (1981); JD, cum laude, Harvard Law School (1984).

Chambers Review

Provided by Chambers

Chambers Guide to the USA

Corporate/M&A - New York

Band 2
Band 2

Individual Editorial
Alan Klein specializes in assisting clients with high-value M&A, among other matters. He is active in a number of industries, with particular acclaim reserved for his handling of technology transactions.

Strengths

Provided by Chambers

  • He is a great strategic M&A advisor and has worked on every type of transaction.

    Corporate/M&AChambers Guide to the USA
  • Alan is really fantastic.

    Corporate/M&AChambers Guide to the USA

Ranked Individuals at Simpson Thacher & Bartlett LLP (156)

California

California: Los Angeles & Surrounds

California: San Francisco, Silicon Valley & Surrou

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District of Columbia

Illinois

Massachusetts

New York

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