Alan Klein is a Partner with Simpson Thacher & Bartlett LLP where he is a member of the Firm’s Corporate Department.  Mr. Klein’s practice concentrates on mergers and acquisitions, U.S. securities law, and corporate finance matters.  Mr. Klein has represented Chinalco in its $12 billon investment in Rio Tinto plc, Microsoft Corporation in its approach to Yahoo! Inc.,  Gas Natural S.A. in its $30 billion bid for Endesa S.A., Rinker Group Limited in connection with its acquisition by Cemex S.A.B. de C.V., Portugal Telecom S.A. in connection with the unsolicited offer made for it by Sonae S.A., Matsushita Electric Works, Ltd. in its acquisition of ULT Holdings, Inc., Gerdau S.A. in its acquisition of Quanex Corporation, Gerdau Ameristeel Corporation in its acquisition of Chaparral Steel Company, Bavaria S.A., Latin America’s second-largest brewer, in its sale to SABMiller plc,  Owens-Illinois Inc. in its acquisition of French packaging company BSN Glasspack from CVC Europe and in its disposition of Owens-Brockway Plastic Products Inc., Merck & Co, Inc. in its tender offer for shares of Banyu, a Japanese pharmaceutical company, Telefonica Moviles S.A. in its acquisition of certain non-U.S. cellular phone companies from Motorola Inc., Pechiney in its proposed three-way merger with Alcan Aluminum and Alusuisse, and Quadrangle Group LLC, a merchant banking fund, in a number of its recent investments.

From 1994 to 1998, Mr. Klein was resident in the Firm's London office, and worked on international transactions, including the merger of Glaxo plc and Wellcome plc; the acquisition of Affymax N.V. by Glaxo; the acquisition by Owens-Illinois, Inc. of the glass and packaging business of BTR plc; the acquisition of Yorkshire Electricity plc by American Electric Power and its partner New Century Energy as well as initial public offerings by British, French, Italian, Norwegian and Swedish companies. 

Mr. Klein joined the Firm in 1984 and became a partner in 1993.  He received his B.A. with Honors in history in 1981 from Haverford College.  He received his J.D., cum laude, from Harvard Law School in 1984.

Honors/Associations

•	Montefiore Medical Center, Member, Board of Trustees (2007-Present)
•	Member, Board of Directors, Lawyers for Children (1999-Present)
•	Volunteers of America-Greater of New York, Inc., Member, Board of Directors (2000-2007)
•	Film Forum, Member, Board of Directors (2005-Present)
•	Citizens Budget Commission, Trustee (2000-Present)
•	Association of the Bar of the City of New York
•	American Bar Association
•	International Bar Association
•	New York State Bar Association

Publications

•	SEC Adopts Exemptions for Cross-Border Tender Offers, Exchange Offers and Rights Offerings
•	SEC Proposes Exemptions for Cross-Border Tender Offers and Rights Offerings
•	Amendments to Regulation S: New Restrictions on Offshore Equity Offerings by U.S. Issuers

Speaking Engagements

•	John Finley Chairs, and Alan Klein Co-Chairs, International Bar Association M&A Conference June 16, 2009
•	John Finley Chairs International Bar Association M&A Conference; Alan Klein Moderates Panel May 28, 2008
•	Alan Klein Speaks at Dow Jones/Accenture M&A Conference April 3, 2008
•	Todd Crider and Alan Klein Speak in Mexico City At the IBA's First Conference of the Americas March 4, 2008

Admissions

•	New York 1986

Education

•	Harvard Law School, 1984 J.D. cum laude
•	Haverford College, 1981 B.A. With Honors; Phi Beta Kappa