Board and Internal Investigations
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Trusted Advisors to Management, Boards, and Committees
Wilson Sonsini's team is called upon by boards, senior management, special committees, and in-house counsel to lead investigations of any size and scope from start to finish, ranging from short-term fact-finding inquiries to long-term, comprehensive probes involving highly sensitive issues.
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Agency and Regulatory Experience
Wilson Sonsini's team is anchored by senior practitioners who have held significant roles in U.S. Attorneys' offices, the SEC, the DOJ, the NSD, and other prosecutorial or regulatory enforcement posts, as well as current and former senior officials at major regulatory and judiciary bodies in the areas of governance, securities laws, stock exchange rules, compliance, and corporate best practices.
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Investigations Experience in Key Industries
Wilson Sonsini has undertaken investigations matters for clients in industries such as the computer hardware, software, life sciences, healthcare, energy, social media, and pharmaceutical sectors.
Practice Dimension and Scope
With one of the largest practices of its kind among AmLaw 100 law firms, Wilson Sonsini has a team of attorneys experienced with undertaking board and internal investigations on behalf of corporate clients. The firm's investigations team has earned the confidence of senior management and boards of directors at some of the world's leading companies by providing sound counsel and effective, often best-case-scenario results.
Wilson Sonsini attorneys have led investigations at the request of boards, audit committees, special committees, management, and in-house legal counsel. Investigations have often been initiated to assess and report on possible oversights or improprieties. The firm's attorneys have shown they are attuned to the unique board and board committee composition and independence considerations often tied to investigations.
Our team's experience gives us the ability to lead an investigation of any size and scope from start to finish. Investigations have ranged from short-term fact-finding inquiries to long-term comprehensive probes involving highly sensitive issues when the objective is to avoid or resolve systemic problems.
Recent internal investigations have concerned potential accounting issues, disclosure requirements, possible FCPA violations, healthcare fraud inquiries, and insider trading. Our investigations team has also conducted due diligence and other internal assessments in conjunction with high profile mergers and acquisitions, financings, and other corporate transactions.
In certain investigations, we helped clients achieve containment, so minor issues never escalated into high-profile controversies. In others, we mobilized quickly to help clients protect corporate brands and reputations. We have also advised clients on policies and internal controls aimed at avoiding future penalties or risk of exposure.
Clients in this area have included mid-size to global companies in key industries, including the computer hardware, software, life sciences, healthcare, energy, social media, and pharmaceutical sectors.
Agency and Regulatory Experience
Investigations are often initiated to prevent or limit irreparable damage to reputation and revenue. Considering the consequences of failure, clients seek out proven and experienced legal counsel.
Our board and internal investigations practice is anchored by senior, top-level practitioners who have held significant roles in U.S. Attorneys' offices, the SEC, the DOJ, the NSD, and other prosecutorial or regulatory enforcement posts. Members of our team include:
- A former federal prosecutor in the Criminal Division of the U.S. Attorney’s Office for the Eastern District of New York
- A former assistant U.S. attorney in the Criminal Division of the U.S. Attorney’s Office for the Southern District of New York
- A former federal criminal prosecutor for the Northern District of California
- A former two-term member of the Advisory Committee on the Federal Rules of Criminal Procedure for the U.S. Judicial Conference, appointed by Chief Justice Roberts
- A former enforcement attorney from the SEC’s Division of Enforcement
- A former assistant chief of the National Criminal Enforcement Section in the DOJ's Antitrust Division
- A former special assistant to the directors of enforcement in the DOJ's Antitrust Division's Office of Operations
Our team also includes current and former senior officials at major regulatory and judiciary bodies in the areas of governance, securities laws, stock exchange rules, compliance, and corporate best practices, including:
- A former Chancellor of the Delaware Court of Chancery
- A former Vice Chancellor of the Delaware Court of Chancery
- The current chair of the NYSE Commission on Corporate Governance
- A current member of the IPO (JOBS Act) Task Force created by the U.S. Treasury Department
- A current member of the Advisory Board of the Securities Regulation Institute
- A member of the SEC Advisory Committee on Smaller Public Companies
- The current co-chair of the NASDAQ Listing and Hearing Review Counsel
- The current chairman of the NYSE Enforcement and Listing Standards Committee
The specialized regulatory and advisory experience of the attorneys in our board and internal investigations practice is a significant advantage to our clients who benefit from our deep familiarity with prosecutorial and enforcement tactics.
Our attorneys are uniquely able to draw on their current and past roles to assist clients with internal investigations prompted by state and federal regulatory schemes. We have undertaken internal investigations and represented clients before key federal enforcement agencies, including the DOJ, SEC, FTC, CFTC, IRS, and FINRA. We have also represented clients in conjunction with investigations led by various state attorney general offices.
Practice Dimension and Scope
With one of the largest practices of its kind among AmLaw 100 law firms, Wilson Sonsini has a team of attorneys experienced with undertaking board and internal investigations on behalf of corporate clients. The firm's investigations team has earned the confidence of senior management and boards of directors at some of the world's leading companies by providing sound counsel and effective, often best-case-scenario results.
Wilson Sonsini attorneys have led investigations at the request of boards, audit committees, special committees, management, and in-house legal counsel. Investigations have often been initiated to assess and report on possible oversights or improprieties. The firm's attorneys have shown they are attuned to the unique board and board committee composition and independence considerations often tied to investigations.
Our team's experience gives us the ability to lead an investigation of any size and scope from start to finish. Investigations have ranged from short-term fact-finding inquiries to long-term comprehensive probes involving highly sensitive issues when the objective is to avoid or resolve systemic problems.
Recent internal investigations have concerned potential accounting issues, disclosure requirements, possible FCPA violations, healthcare fraud inquiries, and insider trading. Our investigations team has also conducted due diligence and other internal assessments in conjunction with high profile mergers and acquisitions, financings, and other corporate transactions.
In certain investigations, we helped clients achieve containment, so minor issues never escalated into high-profile controversies. In others, we mobilized quickly to help clients protect corporate brands and reputations. We have also advised clients on policies and internal controls aimed at avoiding future penalties or risk of exposure.
Clients in this area have included mid-size to global companies in key industries, including the computer hardware, software, life sciences, healthcare, energy, social media, and pharmaceutical sectors.
Agency and Regulatory Experience
Investigations are often initiated to prevent or limit irreparable damage to reputation and revenue. Considering the consequences of failure, clients seek out proven and experienced legal counsel.
Our board and internal investigations practice is anchored by senior, top-level practitioners who have held significant roles in U.S. Attorneys' offices, the SEC, the DOJ, the NSD, and other prosecutorial or regulatory enforcement posts. Members of our team include:
- A former federal prosecutor in the Criminal Division of the U.S. Attorney’s Office for the Eastern District of New York
- A former assistant U.S. attorney in the Criminal Division of the U.S. Attorney’s Office for the Southern District of New York
- A former federal criminal prosecutor for the Northern District of California
- A former two-term member of the Advisory Committee on the Federal Rules of Criminal Procedure for the U.S. Judicial Conference, appointed by Chief Justice Roberts
- A former enforcement attorney from the SEC’s Division of Enforcement
- A former assistant chief of the National Criminal Enforcement Section in the DOJ's Antitrust Division
- A former special assistant to the directors of enforcement in the DOJ's Antitrust Division's Office of Operations
Our team also includes current and former senior officials at major regulatory and judiciary bodies in the areas of governance, securities laws, stock exchange rules, compliance, and corporate best practices, including:
- A former Chancellor of the Delaware Court of Chancery
- A former Vice Chancellor of the Delaware Court of Chancery
- The current chair of the NYSE Commission on Corporate Governance
- A current member of the IPO (JOBS Act) Task Force created by the U.S. Treasury Department
- A current member of the Advisory Board of the Securities Regulation Institute
- A member of the SEC Advisory Committee on Smaller Public Companies
- The current co-chair of the NASDAQ Listing and Hearing Review Counsel
- The current chairman of the NYSE Enforcement and Listing Standards Committee
The specialized regulatory and advisory experience of the attorneys in our board and internal investigations practice is a significant advantage to our clients who benefit from our deep familiarity with prosecutorial and enforcement tactics.
Our attorneys are uniquely able to draw on their current and past roles to assist clients with internal investigations prompted by state and federal regulatory schemes. We have undertaken internal investigations and represented clients before key federal enforcement agencies, including the DOJ, SEC, FTC, CFTC, IRS, and FINRA. We have also represented clients in conjunction with investigations led by various state attorney general offices.
Wilson Sonsini’s 2025 Silicon Valley 150 Corporate Governance Report reviews the corporate governance practices and disclosures of Silicon Valley’s largest public companies. The report includes information regarding board matters, officer matters, defensive measures, proxy statement disclosures, environmental, social, and governance (ESG) and sustainability reporting, stockholder proposals, activism, and executive compensation of the SV150 companies.
Wilson Sonsini’s 2025 Silicon Valley 150 Corporate Governance Report reviews the corporate governance practices and disclosures of Silicon Valley’s largest public companies. The report includes information regarding board matters, officer matters, defensive measures, proxy statement disclosures, environmental, social, and governance (ESG) and sustainability reporting, stockholder proposals, activism, and executive compensation of the SV150 companies.
Chambers UK noted that Mike is “a one-stop shop for global sanctions advice” who is “very responsive with his provision of highly commercial advice.” The publication also described Mike as “one of the most experienced practitioners in the market” who “understands and takes into consideration any necessary complexities and understands the importance of commerciality when giving recommendations.”
Mike has led numerous internal and government-initiated investigations involving potential violations of sanctions, export controls, anti-money laundering laws, anti-bribery laws, and fraud laws throughout the world. He has also represented individuals in pending and threatened litigation.
Mike regularly advises clients on a wide range of compliance issues. He works with clients to develop and implement state-of-the-art compliance programs, including corporate policies, training programs, and third-party procedures. Further, Mike assists clients with carrying out due diligence for many types of corporate transactions. He has successfully guided dozens of investors and companies through the NSI Act review process.
Prior to joining Wilson Sonsini, Mike was a partner in the London office of Kirkland & Ellis.
Mike is the author of Sanctions Enforcement and Compliance: A Practitioner’s Guide to OFAC, a treatise published by Bloomberg BNA. Additionally, leading legal publications have published more than 45 of his articles. He has been quoted in numerous publications, including The Wall Street Journal, The New York Times, and Global Investigations Review.
Before joining the firm, Chris served as Acting U.S. Attorney for the District of Nevada. As the district’s chief federal law enforcement officer, he oversaw criminal and civil cases brought on behalf of the United States, including financial litigation cases, and prosecuted cybercrime (particularly ransomware and business email compromise), white collar crime, and public corruption. In 2021, Chris served on a nationwide task force to determine how the U.S. Department of Justice can more effectively combat hate crimes and hate incidents.
Chris was previously a partner at Jenner & Block, where he helped start the Los Angeles office in 2009.
Chambers UK noted that Mike is “a one-stop shop for global sanctions advice” who is “very responsive with his provision of highly commercial advice.” The publication also described Mike as “one of the most experienced practitioners in the market” who “understands and takes into consideration any necessary complexities and understands the importance of commerciality when giving recommendations.”
Mike has led numerous internal and government-initiated investigations involving potential violations of sanctions, export controls, anti-money laundering laws, anti-bribery laws, and fraud laws throughout the world. He has also represented individuals in pending and threatened litigation.
Mike regularly advises clients on a wide range of compliance issues. He works with clients to develop and implement state-of-the-art compliance programs, including corporate policies, training programs, and third-party procedures. Further, Mike assists clients with carrying out due diligence for many types of corporate transactions. He has successfully guided dozens of investors and companies through the NSI Act review process.
Prior to joining Wilson Sonsini, Mike was a partner in the London office of Kirkland & Ellis.
Mike is the author of Sanctions Enforcement and Compliance: A Practitioner’s Guide to OFAC, a treatise published by Bloomberg BNA. Additionally, leading legal publications have published more than 45 of his articles. He has been quoted in numerous publications, including The Wall Street Journal, The New York Times, and Global Investigations Review.
Before joining the firm, Chris served as Acting U.S. Attorney for the District of Nevada. As the district’s chief federal law enforcement officer, he oversaw criminal and civil cases brought on behalf of the United States, including financial litigation cases, and prosecuted cybercrime (particularly ransomware and business email compromise), white collar crime, and public corruption. In 2021, Chris served on a nationwide task force to determine how the U.S. Department of Justice can more effectively combat hate crimes and hate incidents.
Chris was previously a partner at Jenner & Block, where he helped start the Los Angeles office in 2009.
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