Regulatory
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An Elite Antitrust and Competition Practice
Hailed by Global Competition Review as “perhaps the best Antitrust and Competition practice for high-tech matters in the world,” Wilson Sonsini’s exceptional Antitrust and Competition practice group represents clients in high-stakes antitrust litigation, mergers, and criminal and civil investigation, in addition to providing valuable counseling on business strategy.
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Expanded Healthcare and FDA Regulatory Practice
Wilson Sonsini's newly expanded Regulatory practice includes attorneys experienced in helping clients with healthcare, FDA, and consumer product compliance.
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CFIUS and Export Controls Teams Anchored by Former Government Officials
Wilson Sonsini’s CFIUS and export controls teams include attorneys who have served in the U.S. government on CFIUS and the constituent agencies that enforce national security laws, including the Departments of Commerce, Defense, Homeland Security, and Justice; and the CIA.
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A Highly Ranked Privacy and Cybersecurity PracticeWilson Sonsini's Privacy and Cybersecurity practice is consistently recognized by well-known ranking authorities such as Law360, Chambers USA, Chambers Global, Chambers Europe, and Legal 500.
Wilson Sonsini is the premier legal advisor to technology, life sciences, and growth enterprises worldwide, as well as the venture firms, private equity firms, and investment banks that finance them. We represent companies from entrepreneurial start-ups to multibillion-dollar global corporations at every stage of development. The firm's attorneys collaborate across a comprehensive range of practice areas and industry groups to help the management, boards of directors, shareholders, and in-house counsel of our clients address their most pressing challenges and pursue their most promising opportunities.
The firm has expanded its regulatory services to address the ongoing need clients have for advice concerning enforcement and oversight agencies, both in the U.S. and certain international markets. Our services include antitrust and competition; privacy and cybersecurity; FDA, healthcare, and consumer products; national security (export trade; CFIUS; and FCPA); and advising on other regulatory issues.
In this area, the firm's clients include companies and other entities that compete in rapidly developing and innovative industries, including the biotech, communications, digital media, energy, financial services, medical devices, software and other sectors.
Overview
Wilson Sonsini is the premier legal advisor to technology, life sciences, and growth enterprises worldwide, as well as the venture firms, private equity firms, and investment banks that finance them. We represent companies from entrepreneurial start-ups to multibillion-dollar global corporations at every stage of development. The firm's attorneys collaborate across a comprehensive range of practice areas and industry groups to help the management, boards of directors, shareholders, and in-house counsel of our clients address their most pressing challenges and pursue their most promising opportunities.
The firm has expanded its regulatory services to address the ongoing need clients have for advice concerning enforcement and oversight agencies, both in the U.S. and certain international markets. Our services include antitrust and competition; privacy and cybersecurity; FDA, healthcare, and consumer products; national security (export trade; CFIUS; and FCPA); and advising on other regulatory issues.
In this area, the firm's clients include companies and other entities that compete in rapidly developing and innovative industries, including the biotech, communications, digital media, energy, financial services, medical devices, software and other sectors.
Client Highlights
Wilson Sonsini Advises Highspot on Merger with Seismic
On August 18, 2026, Seismic, an AI-powered sales and revenue enablement platform, announced the completion of its merger with Highspot. Following a second request review, the merger obtained U.S. antitrust clearance, which allowed the transaction to close without any action by the Department of Justice Antitrust Division. The combined company will operate under the Seismic name and be led by Seismic Chief Executive Officer Rob Tarkoff. Wilson Sonsini Goodrich & Rosati advised Highspot on the transaction.
Alerts
CMS Proposes Changes to Incentivize FHIR-enabled Electronic Prior Authorization Use
On July 14, 2026, the Centers for Medicare & Medicaid Services (CMS) announced the CY 2027 Physician Fee Schedule (PFS) proposed rule. The proposed rule includes modifications to further incentivize the use of electronic prior authorization in Medicare Ambulatory Specialty Models (ASMs) and the Merit-based Incentive Payment System (MIPS) by health care providers. This builds on prior CMS regulations related to prior authorization which imposed requirements on certain health plans, but not on health care providers (see 2024 CMS Interoperability and Prior Authorization final rule). These changes are not “PFS” in the technical sense of altering relative value unit (RVU) or conversion-factor payment calculations, but rather are Quality Payment Program (QPP) and Center for Medicare and Medicaid Innovation (CMMI) policy changes that are included in the same omnibus annual rulemaking package. For CMS’s proposed PFS and Hospital Outpatient Prospective Payment System (OPPS) payment changes, see our previous client alert, “Health Reimbursement Signals: CMS Proposes Payment Frameworks for ‘Software as a Medical Service.’”1
Alerts
New Oregon HCMO Rules Bring Higher Fees, New Penalties, and Deal Timing Requirements
On July 1, 2026, Oregon’s significant amendments to the regulations implementing its Health Care Market Oversight (HCMO) program, one of the country’s most comprehensive state healthcare transaction review regimes, took effect. Unlike many state transaction notice laws, Oregon’s program gives the Oregon Health Authority (OHA) power to substantively review and approve, condition, or disapprove covered healthcare transactions.
Insights
Client Highlights
Wilson Sonsini Advises Highspot on Merger with Seismic
On August 18, 2026, Seismic, an AI-powered sales and revenue enablement platform, announced the completion of its merger with Highspot. Following a second request review, the merger obtained U.S. antitrust clearance, which allowed the transaction to close without any action by the Department of Justice Antitrust Division. The combined company will operate under the Seismic name and be led by Seismic Chief Executive Officer Rob Tarkoff. Wilson Sonsini Goodrich & Rosati advised Highspot on the transaction.
Alerts
CMS Proposes Changes to Incentivize FHIR-enabled Electronic Prior Authorization Use
On July 14, 2026, the Centers for Medicare & Medicaid Services (CMS) announced the CY 2027 Physician Fee Schedule (PFS) proposed rule. The proposed rule includes modifications to further incentivize the use of electronic prior authorization in Medicare Ambulatory Specialty Models (ASMs) and the Merit-based Incentive Payment System (MIPS) by health care providers. This builds on prior CMS regulations related to prior authorization which imposed requirements on certain health plans, but not on health care providers (see 2024 CMS Interoperability and Prior Authorization final rule). These changes are not “PFS” in the technical sense of altering relative value unit (RVU) or conversion-factor payment calculations, but rather are Quality Payment Program (QPP) and Center for Medicare and Medicaid Innovation (CMMI) policy changes that are included in the same omnibus annual rulemaking package. For CMS’s proposed PFS and Hospital Outpatient Prospective Payment System (OPPS) payment changes, see our previous client alert, “Health Reimbursement Signals: CMS Proposes Payment Frameworks for ‘Software as a Medical Service.’”1
Alerts
New Oregon HCMO Rules Bring Higher Fees, New Penalties, and Deal Timing Requirements
On July 1, 2026, Oregon’s significant amendments to the regulations implementing its Health Care Market Oversight (HCMO) program, one of the country’s most comprehensive state healthcare transaction review regimes, took effect. Unlike many state transaction notice laws, Oregon’s program gives the Oregon Health Authority (OHA) power to substantively review and approve, condition, or disapprove covered healthcare transactions.
Affiliated Programs
East Coast NextGen VC Forum 2026
LaunchBio’s NextGen VC Forum is the premier event for venture capital professionals to deepen their knowledge of the life science and biotech sectors while building meaningful connections across the industry. The forum features expert led sessions that offer practical insights into evaluating, supporting, and scaling science-backed startups. Networking is built into the program to help participants expand their reach and grow their networks. Co-created with Wilson Sonsini, the half-day forum includes a networking lunch, three interactive one-hour sessions, and a closing happy hour.
Affiliated Programs
Noerr Defense & Security Legal Summit: Navigating Transatlantic Export Controls and ITAR Exposure
Wilson Sonsini is proud to sponsor the Noerr Defense & Security Legal Summit. This year’s summit will place a strong emphasis on international perspectives, bringing together legal experts from across Europe and beyond to exchange views on key cross-border challenges.
Affiliated Programs
West Coast NextGen VC Forum
LaunchBio’s NextGen VC Forum is the premier event for venture capital professionals to deepen their knowledge of the life science and biotech sectors while building meaningful connections across the industry. The forum features expert led sessions that offer practical insights into evaluating, supporting, and scaling science-backed startups. Networking is built into the program to help participants expand their reach and grow their networks. Co-created with Wilson Sonsini, the half-day forum includes a networking lunch, three interactive one-hour sessions, and a closing happy hour.
Speaking Engagements
ABA Business Law Fall Meeting 2026
Wilson Sonsini partner Matt McDonald will join the panel "The House Rules: Investment and M&A Considerations in the Gaming Industry and Other Highly Regulated Sectors" at the ABA Business Law Section's Fall Meeting. The panel will examine the legal and business considerations that shape mergers, acquisitions, and strategic investments in gaming and other highly regulated industries. Panelists will discuss core M&A concepts, including transaction structure, due diligence, representations and warranties, and post-closing risk allocation, alongside the licensing and regulatory approval processes unique to these sectors. The program will also address antitrust and competition concerns tied to industry consolidation, offering practical guidance on managing regulatory scrutiny and closing high-stakes transactions.
Events
Affiliated Programs
East Coast NextGen VC Forum 2026
LaunchBio’s NextGen VC Forum is the premier event for venture capital professionals to deepen their knowledge of the life science and biotech sectors while building meaningful connections across the industry. The forum features expert led sessions that offer practical insights into evaluating, supporting, and scaling science-backed startups. Networking is built into the program to help participants expand their reach and grow their networks. Co-created with Wilson Sonsini, the half-day forum includes a networking lunch, three interactive one-hour sessions, and a closing happy hour.
Affiliated Programs
Noerr Defense & Security Legal Summit: Navigating Transatlantic Export Controls and ITAR Exposure
Wilson Sonsini is proud to sponsor the Noerr Defense & Security Legal Summit. This year’s summit will place a strong emphasis on international perspectives, bringing together legal experts from across Europe and beyond to exchange views on key cross-border challenges.
Affiliated Programs
West Coast NextGen VC Forum
LaunchBio’s NextGen VC Forum is the premier event for venture capital professionals to deepen their knowledge of the life science and biotech sectors while building meaningful connections across the industry. The forum features expert led sessions that offer practical insights into evaluating, supporting, and scaling science-backed startups. Networking is built into the program to help participants expand their reach and grow their networks. Co-created with Wilson Sonsini, the half-day forum includes a networking lunch, three interactive one-hour sessions, and a closing happy hour.
Speaking Engagements
ABA Business Law Fall Meeting 2026
Wilson Sonsini partner Matt McDonald will join the panel "The House Rules: Investment and M&A Considerations in the Gaming Industry and Other Highly Regulated Sectors" at the ABA Business Law Section's Fall Meeting. The panel will examine the legal and business considerations that shape mergers, acquisitions, and strategic investments in gaming and other highly regulated industries. Panelists will discuss core M&A concepts, including transaction structure, due diligence, representations and warranties, and post-closing risk allocation, alongside the licensing and regulatory approval processes unique to these sectors. The program will also address antitrust and competition concerns tied to industry consolidation, offering practical guidance on managing regulatory scrutiny and closing high-stakes transactions.
Josephine Aiello LeBeau
Partner
Josephine focuses on matters related to compliance and enforcement of U.S. export control and sanctions.
Mark Bass
Partner
Mark Bass is a partner in the Washington, D.C., office of Wilson Sonsini Goodrich & Rosati, where he works with public and private technology companies at all stages of growth. He also represents venture capital funds, private equity firms, and investment banks in financings and public offerings.
Michael S. Casey
Partner
Mike Casey is a dual-qualified, Chambers-ranked (Band 1) partner in Wilson Sonsini Goodrich & Rosati’s London office. His practice focuses on advising clients on sanctions, export controls, anti-corruption, and anti-money laundering issues in investigations, counseling, and compliance matters. In addition, he regularly acts as a specialist in mergers, acquisitions, venture financings, lending arrangements, and other types of corporate transactions. He also frequently advises clients on the UK’s National Security and Investment Act and other foreign direct investment review regimes.
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.
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.
Jocelyn Chow
Partner
Jocelyn Chow is a regulatory and compliance partner in the Hong Kong office of Wilson Sonsini Goodrich & Rosati. With a focus on antitrust, national security, and international trade matters, Jocelyn advises multinational corporations on all aspects of antitrust law, global economic and trade sanctions, export controls, import controls, rules of origin, and foreign investment controls. She works with companies operating across numerous industrial sectors, including defense, bioscience, advanced engineering and technology, aviation, telecommunications and broadcasting, and financial services.
Jodi Daniel
Partner
Jodi Daniel is a nationally recognized leader in digital health law and policy, trusted by health care organizations and technology innovators to navigate the complex and dynamic regulatory landscape of digital health and wellness. With over 30 years of experience in healthcare innovation—including 15 years as a lawyer and senior policymaker at the U.S. Department of Health and Human Services (HHS)—Jodi leverages her extensive experience in digital health and health data to deliver strategic, practical advice to clients engaged in groundbreaking products and services that raise novel legal, policy, and ethical issues.
Mark R. Fitzgerald
Partner
Mark is a veteran attorney who advises technology and life sciences companies on corporate law and transactional matters.
Joshua F. Gruenspecht
Partner
Joshua advises domestic and foreign investors, funds, established companies and startups in regulatory, investigative, and enforcement matters.
Jahna Hartwig
Partner
Jahna Hartwig is a partner at Wilson Sonsini Goodrich & Rosati, where she advises domestic and foreign companies on compliance with international trade laws.
Stephen R. Heifetz
Partner
Stephen advises clients on laws and policies at the intersection of international business and national security. He previously served in the U.S. government on the Committee on Foreign Investment in the U.S.
Andrea Linna
Partner
Andrea Linna is a partner at Wilson Sonsini Goodrich & Rosati, where she is a member of the firm’s digital health industry group and its healthcare practice. With more than 15 years dedicated to healthcare law, Andrea exclusively represents digital health and health tech clients, from emerging companies to established industry players and their venture capital investors.
People
Josephine Aiello LeBeau
Partner
Josephine focuses on matters related to compliance and enforcement of U.S. export control and sanctions.
Mark Bass
Partner
Mark Bass is a partner in the Washington, D.C., office of Wilson Sonsini Goodrich & Rosati, where he works with public and private technology companies at all stages of growth. He also represents venture capital funds, private equity firms, and investment banks in financings and public offerings.
Michael S. Casey
Partner
Mike Casey is a dual-qualified, Chambers-ranked (Band 1) partner in Wilson Sonsini Goodrich & Rosati’s London office. His practice focuses on advising clients on sanctions, export controls, anti-corruption, and anti-money laundering issues in investigations, counseling, and compliance matters. In addition, he regularly acts as a specialist in mergers, acquisitions, venture financings, lending arrangements, and other types of corporate transactions. He also frequently advises clients on the UK’s National Security and Investment Act and other foreign direct investment review regimes.
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.
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.
Jocelyn Chow
Partner
Jocelyn Chow is a regulatory and compliance partner in the Hong Kong office of Wilson Sonsini Goodrich & Rosati. With a focus on antitrust, national security, and international trade matters, Jocelyn advises multinational corporations on all aspects of antitrust law, global economic and trade sanctions, export controls, import controls, rules of origin, and foreign investment controls. She works with companies operating across numerous industrial sectors, including defense, bioscience, advanced engineering and technology, aviation, telecommunications and broadcasting, and financial services.
Jodi Daniel
Partner
Jodi Daniel is a nationally recognized leader in digital health law and policy, trusted by health care organizations and technology innovators to navigate the complex and dynamic regulatory landscape of digital health and wellness. With over 30 years of experience in healthcare innovation—including 15 years as a lawyer and senior policymaker at the U.S. Department of Health and Human Services (HHS)—Jodi leverages her extensive experience in digital health and health data to deliver strategic, practical advice to clients engaged in groundbreaking products and services that raise novel legal, policy, and ethical issues.
Mark R. Fitzgerald
Partner
Mark is a veteran attorney who advises technology and life sciences companies on corporate law and transactional matters.
Joshua F. Gruenspecht
Partner
Joshua advises domestic and foreign investors, funds, established companies and startups in regulatory, investigative, and enforcement matters.
Jahna Hartwig
Partner
Jahna Hartwig is a partner at Wilson Sonsini Goodrich & Rosati, where she advises domestic and foreign companies on compliance with international trade laws.
Stephen R. Heifetz
Partner
Stephen advises clients on laws and policies at the intersection of international business and national security. He previously served in the U.S. government on the Committee on Foreign Investment in the U.S.
Andrea Linna
Partner
Andrea Linna is a partner at Wilson Sonsini Goodrich & Rosati, where she is a member of the firm’s digital health industry group and its healthcare practice. With more than 15 years dedicated to healthcare law, Andrea exclusively represents digital health and health tech clients, from emerging companies to established industry players and their venture capital investors.
Related Practices
- Advertising, Promotions, and Marketing
- Antitrust and Competition
- Committee on Foreign Investment in the United States (CFIUS)
- Data, Privacy, and Cybersecurity
- Export Control and Sanctions
- FCPA and Anti-Corruption
- Healthcare and FDA Regulatory
- Federal Trade Commission
- Fintech and Financial Services
- National Security and Trade
- Payments
- Strategic Risk and Crisis Management
- Tariffs, Customs, and Import Compliance
Recent Insights
Client Highlights
Wilson Sonsini Advises Highspot on Merger with Seismic
On August 18, 2026, Seismic, an AI-powered sales and revenue enablement platform, announced the completion of its merger with Highspot. Following a second request review, the merger obtained U.S. antitrust clearance, which allowed the transaction to close without any action by the Department of Justice Antitrust Division. The combined company will operate under the Seismic name and be led by Seismic Chief Executive Officer Rob Tarkoff. Wilson Sonsini Goodrich & Rosati advised Highspot on the transaction.
Learn More
Recent Events
Affiliated Programs
East Coast NextGen VC Forum 2026
LaunchBio’s NextGen VC Forum is the premier event for venture capital professionals to deepen their knowledge of the life science and biotech sectors while building meaningful connections across the industry. The forum features expert led sessions that offer practical insights into evaluating, supporting, and scaling science-backed startups. Networking is built into the program to help participants expand their reach and grow their networks. Co-created with Wilson Sonsini, the half-day forum includes a networking lunch, three interactive one-hour sessions, and a closing happy hour.
Learn More
Affiliated Programs
Noerr Defense & Security Legal Summit: Navigating Transatlantic Export Controls and ITAR Exposure
Wilson Sonsini is proud to sponsor the Noerr Defense & Security Legal Summit. This year’s summit will place a strong emphasis on international perspectives, bringing together legal experts from across Europe and beyond to exchange views on key cross-border challenges.
Learn More
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