Under the leadership of Ken Rivlin, A&O Shearman continues to advise clients on CFIUS filing obligations and transaction structuring across multiple industries, including semiconductors. Catherine Hein joined as partner from Latham & Watkins in February 2026 which has strengthened the firm’s offering.

Clifford Chance‘s growing CFIUS practice advises on CFIUS matters related to large, complex and high-profile deals. Karalyn Mildorf, whose arrival in February 2025 significantly bolstered the firm’s offering, co-leads the group with Renée Latour.

Vinson & Elkins LLP‘s CFIUS practice was strengthened with the hire of Randall Johnston in 2024, who is highlighted for her experience advising on preparing and filing CFIUS notices, negotiating mitigation agreements and assisting with compliance plans and procedures.

Kirkland & Ellis LLP‘s Washington DC CFIUS team is a go-to for significant and high-stakes mandates, regularly assisting on large deals and bet-the-company matters. The group handles mandates which span strategic advice, political risk assessment, and regulatory counseling to filing and advocacy before CFIUS. Noted for its work on behalf of PE firms, the team is turned to by a variety of companies and investors in various industries, from energy, transport, and communications to aerospace and semiconductors. At the helm of the practice sits Ivan Schlager, whose wealth of CFIUS experience and particular strength in the defense sector bolsters the team’s offering. Having joined in 2025, John Kabealo is a key practitioner and leader in the team with experience presiding over complex transactions before CFIUS. Lucille Hague is highlighted for her knowledge of CFIUS considerations in fund formation and design. Mario Mancuso departed in October 2025.

Latham & Watkins‘s highly capable team continues to field a considerable CFIUS workload, maintaining its strong reputation for handling a large portion of the CFIUS filings annually. With experience clearing deals in highly scrutinized sectors, the team handles complex and large transactions across sectors including energy, information technology, manufacturing, and finance, related to countries of interest. Les P. Carnegie, Damara Chambers, and James Barker co-lead the firm’s CFIUS and US national security practice from Washington DC. Carnegie has experience obtaining significant clearances for major clients of the firm. Chambers is noted for her broad expertise which covers negotiating significant national security agreements, and Barker is a go-to for large strategic companies, venture capital, and PE firms, and investment banks. Recent hires add to the government experience already boasted by the team, including Paul Rosen, who joined the team in 2025 and is highlighted for his prior experience as Assistant Secretary of the US Department of Treasury. Counsels Zachary Eddington and Ruchi Gill are also of note.

The team at Simpson Thacher & Bartlett LLP is geared to support clients in assessing and minimizing CFIUS risk, seeking approval of large transactions with minimal or no conditions, and complying with mitigation agreements. Remaining a first port of call for the private equity industry, the practice stands out for its representation of large asset managers before CFIUS on high-profile and complex acquisitions and investments, while representing a wide range of corporations, financial investors, and sovereign wealth funds. The group demonstrates proficiency across an array of sensitive industries, including technology, semiconductor manufacturing, and telecommunications. It is particularly well-placed to advise China and Hong Kong-based companies and investment firms on responding to non-notified inquiries and negotiating mitigation agreements. Malcolm (Mick) Tuesley leads the national security regulatory practice and is very experienced in the CFIUS arena, having provided guidance on highly sensitive investments. Another key team member is Mark Skerry, who has experience securing CFIUS approvals in sensitive industries and negotiating complex mitigation measures. Jennifer Ho is also of note.

White & Case LLP‘s team, which is ‘composed of highly-experienced experts’, acts on the full spectrum of CFIUS mandates. Assisting a diverse client base which includes sovereign entities and large companies, the group is regularly engaged to assess mandatory and voluntary filing obligations, structure and negotiate transactions to mitigate risks, develop CFIUS strategies and negotiate and advise on mitigation agreements and compliance. The team provides advice across a variety of industries and sectors, spanning financial services, aerospace and defense, technology and energy. Lauded for his long-standing expertise handling CFIUS matters, Farhad Jalinous leads the US national security/CFIUS practice. In April 2025, Laura Black joined from Akin, bringing deep experience leading CFIUS engagements related to transactions involving critical infrastructure, advanced technology and US industrial base assets. David Jividen is another key team member. Promoted to partner in January 2025, Ryan Brady is an active team member, utilizing prior government and private-sector experience to advise on all stages of the CFIUS process. Karalyn Mildorf departed in February 2025.

Cleary Gottlieb Steen & Hamilton is sought out by a client base spanning sovereign wealth funds, asset managers, and multinational companies, for assistance handling deals involving CFIUS assessments, and negotiating mitigation agreements. The team has demonstrated capabilities in the energy, semiconductors, and aerospace and defense sectors. Foreign investment and national security team head Chase Kaniecki has a proven track record filing CFIUS notices and negotiating mitigation agreements. B.J. Altvater has played an integral role in negotiating complex and significant national security agreements, with experience litigating a CFIUS outcome. Samuel Chang, who was promoted to partner in 2025, is another key attorney.

The CFIUS, trade controls and government contracts practice group at Cooley LLP is highlighted for its expertise in post-closing CFIUS enforcement actions. While maintaining its strong reputation for representing technology and life sciences companies and their investors, the team is also capable of acting for various private and public companies, private equity firms and financial institutions, with core areas of expertise including defense and space technology. Christopher Kimball spearheads the offering, alongside his impressive counseling practice. Kevin King also advises clients on CFIUS issues, complementing his export control and trade sanction compliance expertise. With strong experience counseling clients, Dillon Martinson leads on CFIUS filings.

Led by Paul Marquardt in Washington DC, the team at Davis Polk & Wardwell LLP is well-equipped to advise on the CFIUS aspects of complex, cross-border transactions. It leverages the firm’s wider M&A practice and is closely integrated with the firm’s established China practice. The group’s client base includes financial institutions and companies operating in the energy, pharmaceutical, aerospace and defense, and semiconductors sectors. Marquardt has long-standing expertise guiding companies through CFIUS reviews. Ben Joseloff joined in 2026, bringing with him prior government experience, and a focus on CFIUS aspects of cross-border transactions.

Hogan Lovells US LLP‘s CFIUS practice, based in Washington DC, is noted for its expertise advising on complex jurisdictional and mandatory filing issues. The team is turned to by a varied client base, which includes US investors and start-up and early-stage technology companies. The group handles matters in sensitive industries, including aerospace and defense. Noted for her prior experience with the Treasury Department, Anne Salladin leads the CFIUS practice, alongside Brian Curran, who is particularly well-positioned to advise on matters at the intersection between CFIUS and export controls. Zachary Alvarez and Patrick Miller are other key team members.

Leveraging the firm’s strong reputation for its technology expertise, the CFIUS team at Morrison Foerster stands out for its advice related to complex CFIUS requirements facing inbound tech investors, tech M&A, and full-service CFIUS counseling to large tech companies. Boasting practitioners with experience in private practice and government, the team advises on a full scope of CFIUS matters, and the firm’s regional knowledge assists the practice to identify and execute filing requirements and mitigate risks to deals. Based in Washington DC, co-chair of the national security group Brandon Van Grack provides advice on CFIUS implications of transactions. Charles Capito broadly assists US businesses to navigate the CFIUS process and has experience securing clearances in large, sensitive CFIUS cases. James Brower is another key practitioner, as is David Newman, who joined from the Department of Justice in March 2025.

With noted experience in the financial services, life sciences, and energy sectors, Skadden, Arps, Slate, Meagher & Flom LLP‘s team comfortably represents clients, which include public and private companies and institutional investors, in high-value transactions before CFIUS. Based in Washington DC, Michael Leiter leads the global national security practice and has a notable focus on aerospace and defense mandates. Leiter brings experience navigating national security reviews, including helping clients address potential national security concerns prior to engagement with CFIUS. Brian J. Egan is another active team member advising on the CFIUS aspects of large acquisitions and investments. Brooks E. Allen is another key attorney of note, as is Tatiana Sullivan.

WilmerHale boasts a team that is well-equipped to handle challenging CFIUS matters, from participating in the review process and structuring transactions, to advising on filing obligations and strategy, and negotiating NSAs. The group acts for a wide range of clients including investment funds, venture capital firms, and manufacturers. Benjamin Powell co-leads the CFIUS practice from Washington DC, alongside Matthew Olsen, who joined in 2025. Powell has a strong track record guiding companies through complex CFIUS filings as part of large, international transactions. Jason Chipman is another active team member, as is Robert Kimmitt.

DLA Piper LLP (US)‘s growing bench of CFIUS practitioners draws upon the firm’s broader global footprint to offer various capabilities assisting clients with CFIUS matters. Co-chairs of the global CFIUS and FDI practices Christine Daya and Nicholas Klein are increasingly a go-to for sovereign wealth and investment fund clients. With expertise across a wide range of sectors, the team provides advice on matters related to CFIUS strategy, compliance, and non-notified reviews, regarding aerospace and defense, and emerging technologies including semiconductors and artificial intelligence. Notable 2025 arrivals Michael Walsh and Adam Vaccaro added valuable government experience to the team. Leonard Yoo and Pete Young are other key team members.

Freshfields is home to a team of dedicated practitioners with deep practical experience in the CFIUS process and policy expertise. Based in Washington DC but drawing on the firm’s global footprint, the team is well-versed to coordinate multi-jurisdictional filings. It has a proven track record of negotiating sensitive and complex mitigation agreements, and clearing transactions without mitigation. The group works across a range of industries spanning semiconductors, aerospace and defense. Widely respected practice head Aimen Mir brings significant experience running CFIUS. For advice throughout all stages of the CFIUS process, Christine Laciak is another go-to for clients, from due diligence and contract negotiations to risk assessments, notifications and reviews.

As part of the broader international trade and regulatory compliance group, Steptoe LLP‘s CFIUS team has capabilities navigating complex reviews, mitigation negotiations and jurisdictional strategy across a wide range of sectors, including semiconductors, AI and defense, as well as energy, data infrastructure, and emerging technologies. The group’s advice extends to assisting clients to respond to non-notified inquiries, including related to sensitive jurisdictions. The highly active Brian Fleming and Evan Abrams lead the team.

Underpinned by the firm’s global presence and broader government relations practice, Akin‘s CFIUS offering is well-positioned to assist clients to navigate CFIUS risks in sensitive transactions and with sensitive jurisdictions. The team has knowledge across industries including aerospace and defense, data and cybersecurity, and energy. Christian Davis steers the CFIUS practice, with a focus on CFIUS risk management during mergers, acquisitions and divestitures. Promoted to partner in 2025, Katherine Padgett is another key attorney who has experience representing clients in formal CFIUS proceedings. Laura Black departed in 2025.

Leveraging Baker McKenzie‘s international presence, the team, which forms part of the global trade compliance practice, is capable of advising on the CFIUS aspects of large, multi-jurisdictional transactions across various sensitive industries, including semiconductors and defense. It is a strong choice for companies seeking advice on CFIUS filing strategies, and compliance with, and negotiation of, mitigation agreements. The ‘excellent’ Rod Hunter is noted for his experience as White House lead and has a strong track record before CFIUS. Sylwia Lis is another active senior partner who is also a strong choice for advice on CFIUS implications and strategy as part of corporate transactions. Lise Test and Alexandra Kumar are other key team members.

With a well-established domestic and international client base including sovereign wealth funds and investors, the Dechert CFIUS practice deals with a variety of complex matters, in sensitive industries and jurisdictions. Key services include pre-transaction due diligence, structuring, CFIUS strategy, and filing. The team also negotiates NSAs with CFIUS where necessary, with a proven track record of doing so with minimal delay and conditions. Exemplifying this in particular is Jeremy B. Zucker, who is chair of the firm’s national security practice. Supporting Zucker is Hrishikesh Hari, who has notable experience advising on CFIUS considerations related to high-profile transactions. Darshak Dholakia departed in March 2025.

Investors and multinational corporations turn to the team at King & Spalding for CFIUS filings and advisory work related to investments, takeovers and capital raises. The team has a focus on clients operating in energy, infrastructure, real estate, and technology sectors, but is highlighted for its specialist knowledge in matters related to hyperscale data centers. Christine Savage leads the firm’s CFIUS, export controls and sanctions practice from Washington DC, with core strengths in fintech, aerospace and defense. With ‘vast experience and connection within the regulatory circle’, Philip Ludvigson is an active and key CFIUS advisor, with notable expertise leading large transactions. Jamieson Greer departed in February 2025.

Pillsbury Winthrop Shaw Pittman LLP‘s CFIUS team regularly counsels clients in the semiconductor, defense, and energy sectors on mandatory and voluntary filings, mitigation strategies and structuring transactions. Nancy Fischer leads the national security practice and the regulatory business unit and advises on CFIUS reviews. Matthew Rabinowitz is an active member of the team who focuses on CFIUS clearances. With a focus on FOCI and CFIUS matters in the defense and advanced technology industries, Benjamin Cote is a particularly strong choice for international clients.

Reed Smith LLP‘s team assists with filings and ongoing compliance mandates, including related to complex, cross-border, and technology-driven foreign investment matters. The group assists a client base which includes large companies operating in sectors ranging from energy, manufacturing, and transportation, to AI, financial services, and retail. Washington DC-based practice head Michael Lowell is a key advisor on major CFIUS-reviewed transactions, with a proven track record addressing concerns tied to investments owned by sensitive jurisdictions. Lowell’s experience on non-notified transactions and negotiating mitigation agreements is highlighted.

Weil, Gotshal & Manges LLP‘s team leans on the firm’s wider M&A and private equity offering to advise public and private companies, private equity funds, and sovereign wealth funds on a range of CFIUS issues. The team’s knowledge spans the technology, manufacturing, energy, and financial services sectors. Based in Washington DC, Shawn Cooley spearheads the offering and stands out for his extensive government experience. Antonia Tzinova, who joined the firm in October 2025, has a background representing clients before CFIUS.