Michael Osnato

Ranked in 2 Practice Areas

Band 2

Securities: Regulation: Enforcement

USA - Nationwide

6 Years Ranked

Band 5

Litigation: White-Collar Crime & Government Investigations

New York

1 Years Ranked

About

Provided by Michael Osnato

USA

Practice Areas

Michael J. Osnato, Jr., former Chief of the Complex Financial Instruments Unit of the Securities and Exchange Commission’s Enforcement Division, is a Litigation Partner and member of the Firm’s Government and Internal Investigations Practice. Drawing on his deep breadth of experience at the SEC, Mike is also the Head of Simpson Thacher’s Funds Regulatory and Investigations group. He focuses on high-stakes regulatory and criminal matters, government investigations, sensitive whistleblower complaints and SEC examination and compliance counseling, including with respect to regulatory developments involving cryptocurrency and other digital assets. Representative matters include high-profile accounting fraud, asset valuation, FCPA, cryptocurrency, insider trading, public company disclosure and adviser conflicts of interest investigations before multiple government agencies.

Career

Joined the Firm in 2017; U.S. Securities and Exchange Commission from 2008-2017; prior practice at prominent global law firms.

Professional Memberships

American Bar Association; New York City Bar Association White Collar Committee; SEC Enforcement Alumni; Law360 Compliance Editorial Advisory Board.

Publications

Co-author of Simpson Thacher Regulatory and Enforcement Alert.

Personal

J.D. with honors from Fordham Law School in 1997; B.A. with honors from Williams College in 1994.

Chambers Review

Provided by Chambers

Chambers Guide to the USA

Securities: Regulation: Enforcement - USA - Nationwide

Band 2

Individual Editorial

Michael Osnato specializes in complex SEC regulatory matters and is particularly noted for his handling of investigations and enforcement actions involving financial products.

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Litigation: White-Collar Crime & Government Investigations - New York

Band 5

Individual Editorial

Michael Osnato leverages his experience as a former senior official in the SEC’s Enforcement Division to represent his clients in a variety of regulatory and government investigations. His clients include financial institutions, public companies, investment managers, cryptocurrency entities and individuals.

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Strengths

Provided by Chambers

Michael is knowledgeable, thoughtful and a quick thinker.

Securities: Regulation: Enforcement respondent
Chambers Guide to the USA

Michael has strong knowledge of SEC law and regulations. He is a very creative lawyer, with stellar judgement and is unflappable in the face of pressure.

Litigation: White-Collar Crime & Government Investigations respondent
Chambers Guide to the USA

Michael is knowledgeable, thoughtful and a quick thinker.

Securities: Regulation: Enforcement respondent
Chambers Guide to the USA

Michael has strong knowledge of SEC law and regulations. He is a very creative lawyer, with stellar judgement and is unflappable in the face of pressure.

Litigation: White-Collar Crime & Government Investigations respondent
Chambers Guide to the USA

Filter by

California

Capital Markets: Debt & Equity

Dan Webb

Band 1

Michael Osnato

USA Guide 2025

Securities: Regulation: Enforcement + 1 more ranking

About

Practice Areas

Career

Professional Memberships

Publications

Personal

Chambers Review

Chambers Guide to the USA

Securities: Regulation: Enforcement - USA - Nationwide

Individual Editorial

Litigation: White-Collar Crime & Government Investigations - New York

Individual Editorial

Strengths

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California

California: Los Angeles & Surrounds

California: San Francisco, Silicon Valley & Surro

District of Columbia

Massachusetts

New York

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