William J. O'Brien

Counsel at Paul, Weiss, Rifkind, Wharton & Garrison LLP

William J. O'Brien

William J. O'Brien

Counsel at Paul, Weiss, Rifkind, Wharton & Garrison LLP

Biography

EXPERIENCE

William J. O'Brien is counsel in the Environmental Law Group and a member of the firm’s Climate Change Working Group. Bill has advised various private investment funds on the environmental aspects of investments in private and public companies and the acquisition of portfolio companies, including conventional and alternative energy companies. He has also advised on numerous financings and securities offerings. He has written and lectured on various aspects of environmental law, including environmental disclosure requirements in securities offerings, parent corporation liability for environmental obligations and environmental law aspects of real property transfers.

Chambers USA recognizes Bill as a leading lawyer in transactional environmental law, with sources calling him “very business-focused and a great practitioner.” Bill has also been recognized by Super Lawyers and the International Who's Who of Business Lawyers for his work in environmental law.

Bill's recent representations include:

* Elanco Animal Health Incorporated in its $7.6 billion acquisition of the animal health business of Bayer AG;
* Salini Impregilo S.p.A. in the $555 million sale of the Plants & Paving division of its US subsidiary Lane Construction Inc. to Eurovia SAS, a company of the Vinci Group;
* C&D Technologies, Inc., a portfolio company of KPS Capital Partners, LP, in its acquisition of Trojan Battery Company, LLC from Charlesbank Capital Partners, LLC and other shareholders;
* Honeywell, a Fortune 100 software-industrial company, in its spin-off of Garrett Motion Inc., Honeywell's former Transportation Systems business;
* Ingersoll-Rand plc in the merger of its Industrial business with Gardner Denver Holdings, Inc, a provider of industrial equipment and technologies, creating a $15 billion global leader in mission-critical flow and industrial technologies;
* KPS Capital Partners, LP in several matters, including:
* in connection with its $1.8 billion acquisition of Howden; and
* along with International Equipment Solutions, LLC, a portfolio company of KPS, in the $690 million sale of the attachments division of International Equipment Solutions to Stanley Black & Decker, Inc.

* Bicent Power Company LLC, an affiliate of Beowulf Energy and Natural Gas Partners, in connection with an agreement to acquire Northwestern Corp.’s 30 percent interest in Colstrip Unit 4, a 740 MW coal-fired facility, for $404 million in cash;
* Cenovus Energy Inc., a wholly-owned subsidiary of EnCana Corporation, in connection with Rule 144A/Regulation S offering of $3.5 billion of senior notes; and
* Husky Energy Inc. in connection with a public offering of $1.5 billion of debt securities.

In addition, Bill has an active pro bono practice. He recently advised Green Chimneys Children's Services on its merger with Clearpool, Inc. He has also advised on a number of transactions for the Trust for Public Land, a nonprofit, land conservation organization.

Overview
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1114

Number of Awards

1

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Partner at Paul, Weiss, Rifkind, Wharton & Garrison LLP

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Counsel at Paul, Weiss, Rifkind, Wharton & Garrison LLP

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Partner at Paul, Weiss, Rifkind, Wharton & Garrison LLP

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Partner at Paul, Weiss, Rifkind, Wharton & Garrison LLP

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Counsel at Paul, Weiss, Rifkind, Wharton & Garrison LLP

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Partner at Paul, Weiss, Rifkind, Wharton & Garrison LLP

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Partner at Paul, Weiss, Rifkind, Wharton & Garrison LLP

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Partner at Paul, Weiss, Rifkind, Wharton & Garrison LLP

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Partner at Paul, Weiss, Rifkind, Wharton & Garrison LLP

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Counsel at Paul, Weiss, Rifkind, Wharton & Garrison LLP

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William J. O'Brien
Counsel at Paul, Weiss, Rifkind, Wharton & Garrison LLP
Education
JD
Class of 1986

The University of Pennsylvania Law School, located in Philadelphia, Pennsylvania, is the law school of the University of Pennsylvania. A member of the Ivy League, it is among the oldest and most selective law schools in the nation. It is currently ranked 7th overall by U.S. News & World Report, and 1st in terms of career prospects by the Princeton Review, a rank awarded also by the National Law Journal based on placement of graduates in top law firms.It offers the degrees of Juris Doctor (J.D.), Master of Laws (LL.M.), Master of Comparative Laws (LL.C.M.), and Doctor of the Science of Law (S.J.D.).

BA
Class of 1981

Williams College is a private liberal arts college located in Williamstown, Massachusetts, United States. It was established in 1793 with funds from the estate of Ephraim Williams. Originally a men's college, Williams became co-educational in 1970. It is located in Williamstown, MA, USA.

Career History
Counsel
Current

Paul, Weiss, Rifkind, Wharton & Garrison LLP is a law firm that serve as counsel to companies and investment funds. They have expertise in the areas of bankruptcy and corporate reorganization, employee benefits and executive compensation, intellectual property, personal representation, real estate and tax law. The company is headquartered in New York, NY.

Political Donations
$250
2011

Ambassador to New Zealand at United States Department of State

$250
2008

Former President of United States

Transactions
Details Hidden

Rhône Capital LLC purchases Lummus Technology LLC from McDermott International, Inc.

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KPS Capital Partners LP purchases Lufkin Industries LLC from Baker Hughes Co.

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Mitsubishi Chemical Holdings Corp., Mitsubishi Plastics Composites America, Inc. purchase Gelest, Inc. from New Mountain Capital LLC

Awards & Honors
Admitted to the New York Bar
Events
Speaker
Stamford, CT, United States
2009 Yale School of Management Annual Private Equity Conference

Other Affiliations

William J. O'Brien is affiliated with Paul, Weiss, Rifkind, Wharton & Garrison LLP

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