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Sam K. Obenhaus
Partner
Sam Obenhaus is a corporate and securities partner in the New York office of Wilson Sonsini Goodrich & Rosati. Sam advises venture-backed technology companies at all stages of development—from seed-stage start-ups to unicorns raising hundreds of millions of dollars—through private financings, strategic transactions, and mergers and acquisitions.
Bob O'Connor
Partner
Bob serves as a strategic partner to his clients and their boards of directors through a broad range of complex financing and strategic corporate transactions at all stages of their development.
Philip H. Oettinger
Partner
Philip focuses primarily on the representation of medical device, biotechnology, pharmaceutical, diagnostic, and digital health companies in corporate governance, IPO, M&A, public company reporting, and private equity and debt financing matters.
Maureen Ohlhausen
Partner
Maureen Ohlhausen co-chairs Wilson Sonsini Goodrich & Rosati's antitrust and competition practice. A former acting chairman of the Federal Trade Commission (FTC), and the only FTC commissioner to receive the Robert Pitofsky Lifetime Achievement Award, she advises clients on complex antitrust and consumer protection matters. Sought after for her depth of experience on antitrust and FTC-related issues, Maureen is known for her relationships with officials in the U.S. and abroad.
Christopher N. Olsen
Partner
Christopher advises clients on all aspects of privacy and cybersecurity matters and represents companies under investigation by the FTC and state attorneys general.
Kenneth O'Rourke
Partner
Ken represents companies in antitrust litigation, including complex cases and high-stakes disputes litigated in the U.S. and abroad.
Taylor M. Owings
Partner
Taylor M. Owings is a partner in the New York office of Wilson Sonsini Goodrich & Rosati, where she represents clients in civil merger and non-merger matters both before federal and state government agencies and in private litigation. She also counsels clients on the application of antitrust law to their business operations, with an emphasis on issues arising in technology-focused industries.
Brad O'Brien
Partner Emeritus
Brad O'Brien played a leadership role in the real estate practice at Wilson Sonsini Goodrich & Rosati.
Michael A. Occhiolini
Partner Emeritus
Michael’s practice focused on corporate finance, corporate law and governance, and derivatives.
Lucian Orbai
Senior Counsel
Lucian Orbai is senior counsel in the San Francisco office of Wilson Sonsini Goodrich & Rosati, where he focuses on intellectual property matters and global patent strategy for life sciences clients in multiple fields, including tools, diagnostics and pharmaceuticals. His work includes prosecution of U.S. and foreign patent portfolios as well as patent strategy and patent diligence, including freedom-to-operate and patentability studies. Lucian has managed IP aspects of various corporate transactions including financings and M&A. He has also worked with foreign counsel to draft and file multiple European Patent opposition briefs.
Daniel E. Orr
Senior Counsel
Dan Orr is senior counsel at Wilson Sonsini Goodrich & Rosati, where he brings an insider’s perspective to helping clients prevent and solve problems with the U.S. Food & Drug Administration. Dan, a former FDA regulatory counsel, has more than 20 years of experience concerning regulation of drugs, biologics, and medical devices.
Alex O’Sullivan-Pierce
Senior Commercial Counsel
Alex is a senior commercial transactions attorney with deep experience advising businesses and in-house corporate counsel on technology contracts and a specialty in managing legal service delivery teams.
Kathryn Obermiller
Associate
Kathryn Obermiller is an associate in the Seattle office of Wilson Sonsini Goodrich & Rosati.
Mary Katherine O'Boyle
Associate
Mary Katherine (MK) O'Boyle is an associate in the Wilmington office of Wilson Sonsini Goodrich & Rosati. Her practice focuses on Delaware corporate law and corporate governance.
Mary O'Brien
Associate
Mary O'Brien is an associate in the technology transactions practice in Wilson Sonsini Goodrich & Rosati’s Palo Alto office. She focuses her practice on intellectual property, licensing, and commercial transactions. Her practice covers a wide range of activities related to the commercialization of technology, such as strategic commercial transactions, financings, and mergers and acquisitions.