Mr Alan Klein > Simpson Thacher & Bartlett LLP > New York, United States > Lawyer Profile
Simpson Thacher & Bartlett LLP Offices

425 LEXINGTON AVENUE
NEW YORK, NY 10017-3954
NEW YORK
United States
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Mr Alan Klein

Work Department
Corporate/Mergers and Acquisitions
Position
Alan is a Partner in the Firm’s M&A Practice and until recently served as Co-Head of the Practice. Represented the board of Twitter in the company’s sale to Elon Musk. Advised Microsoft on many transactions, including its acquisition of Activision as well as LinkedIn, Skype, and many others; ChemChina in its acquisition of Syngenta, the largest acquisition ever by a Chinese company; Tyco in its merger with Johnson Controls, Inc.; 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.
Education
Haverford College (B.A., with Honors, 1981); Harvard Law School (J.D., cum laude,1984).
Lawyer Rankings
United States > M&A/corporate and commercial > M&A: large deals ($1bn+)
(Leading partners)The ‘well-rounded‘ practice at Simpson Thacher & Bartlett LLP remains a key player on the M&A market and continues to advise on a wide range of impactful and high-value strategic transactions. The team demonstrates significant expertise in representing clients from across the financial services, tech, and infrastructure spheres, with practice head Eric Swedenburg regularly assisting public and private corporations with a diverse array of mergers, acquisitions and divestitures. The ‘reliable’ Mark Viera focuses on complex dispositions and leveraged buyouts, Lee Meyerson is noted for his expertise in connection with mergers in the financial services industry, and Alan Klein specializes in shareholder activism and corporate governance issues. Mario Ponce specialises in handling negotiated and hostile M&A transactions, and Elizabeth Cooper concentrates on recapitalizations and investments Katy Lukaszewski, who arrived from Sidley Austin LLP in September 2023, handles complex energy and infrastructure-based transactions. All attorneys mentioned are based in New York.
Lawyer Rankings
- Leading partners United States > M&A/corporate and commercial > M&A: large deals ($1bn+)
- M&A: large deals ($1bn+) United States > M&A/corporate and commercial
Top Tier Firm Rankings
- Insurance > Advice to insurers
- Finance > Capital markets: debt offerings
- Finance > Capital markets: equity offerings
- Finance > Capital markets: global offerings
- Finance > Capital markets: high-yield debt offerings
- International trade and national security > CFIUS
- Labor and employment > Employee benefits, executive compensation and retirement plans: transactional
- Dispute resolution > Financial services litigation
- Dispute resolution > General commercial disputes
- Dispute resolution > M&A litigation: defense
- M&A/corporate and commercial > M&A: large deals ($1bn+)
- Real estate > Real estate finance
- Tax > Not-for-profit (Fortune 1000 private foundations, national trade associations, and charities)
- M&A/corporate and commercial > Private equity buyouts: large deals ($500m+)
- Investment fund formation and management > Private equity funds (including venture capital)
- Real estate > Real estate
- Dispute resolution > Securities litigation: defense
- Tax > US taxes: non-contentious
Firm Rankings
- Antitrust > Cartel
- Energy > Energy transactions: electric power
- Environment > Environment: transactional
- Tax > International tax
- Antitrust > Merger control
- Investment fund formation and management > Mutual/registered/exchange-traded funds
- Real estate > Real estate investment trusts (REITs)
- Energy > Renewable/alternative power
- Antitrust > Civil litigation/class actions: defense
- M&A/corporate and commercial > Corporate governance
- Energy > Energy transactions: oil and gas
- Finance > Project finance
- Finance > Restructuring (including bankruptcy): corporate
- Finance > Structured finance: securitization
- Media, technology and telecoms > Technology transactions
- Finance > Financial services regulation
- Dispute resolution > Leading trial lawyers
- Dispute resolution > Leading trial lawyers
- Finance > Structured finance: derivatives and structured products
- Dispute resolution > Appellate: courts of appeals / Appellate: supreme courts (states and federal)
- Finance > Commercial lending
- Dispute resolution > Corporate investigations and white-collar criminal defense
- Finance > Fintech
- Media, technology and telecoms > Cyber law (including data privacy and data protection)