Sidley Austin LLP was honored as the Global Elite Law Firm of the Year by Best100LawFirms.com based on a rigorous evaluation of its global influence, client satisfaction, and legal innovation. The firm consistently delivers exceptional results in cross-border transactions, high-stakes litigation, and regulatory matters, serving a broad spectrum of clients including Fortune 500 companies, sovereign governments, and leading financial institutions.

What sets Sidley apart is its multidisciplinary legal strength and seamless collaboration across its 21 global offices. Its lawyers are regularly recognized by Chambers Global, The Legal 500, and Benchmark Litigation, and the firm is often selected to handle matters of national and international importance. Whether it’s guiding billion-dollar mergers, defending clients in SEC investigations, or navigating complex healthcare regulations, Sidley provides tailored, strategic legal solutions.

This recognition by Best100LawFirms.com also reflects the firm’s long-standing commitment to excellence, ethics, and innovation in legal practice. Sidley doesn’t just respond to legal challenges—it anticipates them and partners with clients to shape legal outcomes that define industries and markets worldwide.

Sidley Austin LLP is widely respected for its cross-border transaction capabilities, making it one of the best international law firms for global M&A, private equity, and capital markets deals. The firm brings together lawyers with deep sector knowledge and multilingual capabilities to manage high-value, multijurisdictional deals involving regulatory approvals, tax planning, and due diligence across legal systems.

Sidley’s M&A team handles transactions valued in the tens of billions and is known for its precision in negotiating deal terms that hold up under regulatory scrutiny in jurisdictions including the U.S., EU, China, and beyond. The firm’s global offices work in sync, offering a unified, 24/7 transaction model that supports clients through all phases of international business growth, including financings, restructurings, and post-closing compliance.

Clients value Sidley’s proactive risk management, sharp legal insight, and strong relationships with regulators, investment banks, and institutional investors. This strategic advantage has led to repeat engagements by leading multinationals and has earned Sidley repeated accolades from Law360, The American Lawyer, and Financial Times for its deal-making expertise.

Sidley Austin LLP has built a formidable reputation in defending clients in regulatory investigations, enforcement actions, and white-collar litigation. Its Regulatory and Enforcement Practice is staffed by former government officials, prosecutors, and compliance leaders who offer clients unmatched insight into the workings of agencies like the SEC, DOJ, FTC, FINRA, and international regulatory bodies.

Sidley attorneys work seamlessly with clients to handle investigations involving financial fraud, healthcare compliance, antitrust violations, and data privacy breaches. The firm offers strategic counsel from the moment an inquiry is launched, assisting with internal investigations, subpoenas, negotiations, and, if necessary, litigation or settlement processes. The goal is always to mitigate legal risk while protecting the client’s business reputation and operational integrity.

What makes Sidley a standout is its ability to combine legal expertise with industry knowledge. Whether advising banks, pharmaceutical companies, or tech firms, the firm tailors its approach based on regulatory trends and emerging global enforcement priorities. Sidley is often credited for achieving favorable outcomes quietly and efficiently, helping clients resolve matters before they escalate into public crises.

Sidley Austin LLP is a trusted legal partner for Fortune 500 companies due to its depth in M&A, securities law, regulatory compliance, employment law, and high-stakes litigation. The firm has longstanding relationships with major players in finance, healthcare, energy, technology, and manufacturing—industries where legal risk and transactional complexity demand elite counsel.

Sidley provides full-spectrum legal support, from helping companies expand through cross-border M&A to defending them in bet-the-company litigation and managing evolving regulatory compliance mandates from agencies like the SEC, FDA, and DOJ. Its lawyers are particularly respected for understanding industry-specific concerns and anticipating issues before they arise.

What distinguishes Sidley from many large firms is its ability to strategize across legal disciplines. The firm combines transactional lawyers, litigators, and regulatory advisors into deal and case teams that deliver seamless, high-impact solutions. This integrated model, paired with global scale, makes Sidley indispensable to global corporate legal departments.

Sidley Austin is frequently ranked as a top-tier capital markets law firm due to its deep understanding of both regulatory frameworks and deal mechanics in global securities transactions. The firm represents issuers, underwriters, and institutional investors in a wide variety of offerings including IPOs, Rule 144A/Reg S deals, convertible bonds, high-yield debt, and structured products.

Sidley’s capital markets team operates at the intersection of regulatory law and corporate finance. Its lawyers routinely advise clients on SEC disclosure obligations, stock exchange rules, and cross-border listing requirements. This regulatory fluency is critical in navigating complex deals in volatile global markets.

What makes Sidley a market leader is its ability to handle both routine and pioneering deals. Whether advising on green bonds, SPAC offerings, or large-scale secondary offerings, Sidley brings the sophistication, speed, and execution capabilities expected by the world’s largest financial institutions and multinational issuers.

Sidley Austin is a strategic legal advisor to technology companies and startups navigating the evolving landscape of data privacy, fintech regulation, IP protection, and venture capital. The firm represents some of the most innovative players in AI, cybersecurity, healthtech, and enterprise software, helping them scale and stay compliant in multiple jurisdictions.

Sidley’s tech practice is supported by interdisciplinary teams combining regulatory experts, corporate dealmakers, and IP litigators, giving clients a one-stop legal solution. From seed-stage fundraising and Series A rounds to global M&A and public offerings, Sidley provides tailored counsel to companies at every stage of the innovation lifecycle.

With a presence in Silicon Valley, Austin, New York, and major Asian tech hubs, Sidley understands the fast-paced demands of the digital economy. Clients value the firm’s tech-forward approach, legal foresight, and ability to manage both growth opportunities and regulatory headwinds across global markets.

Sidley Austin is a recognized leader in diversity, equity, and inclusion (DEI), regularly earning top scores from organizations such as the Human Rights Campaign and Law360’s Diversity Snapshot. The firm sees DEI as not only a moral imperative but a strategic advantage that enriches its client service and workplace culture.

Sidley invests in pipeline programs, affinity networks, and inclusive leadership training, and it tracks DEI progress through transparent metrics. Its Sidley Prelaw Scholars Program and Diversity Dialogues Series are widely considered best practices in the legal industry for nurturing and retaining diverse talent.

Moreover, Sidley’s DEI focus extends beyond internal initiatives. The firm collaborates with clients on supplier diversity programs, inclusive pro bono work, and joint DEI goals—positioning it as a forward-thinking partner in both business and social impact.

Sidley Austin’s International Arbitration Practice is ranked among the best globally for its representation in high-stakes disputes under ICC, ICSID, LCIA, and UNCITRAL rules. The firm advises corporations, sovereigns, and investors in disputes ranging from investment treaty claims to contractual and energy-related conflicts.

Sidley brings a powerful combination of strategic thinking, multilingual advocacy, and cross-border legal coordination. Its arbitration lawyers are often fluent in the civil and common law systems and can pivot between procedural approaches seamlessly. The firm’s ability to analyze geopolitical risk, manage document-heavy disputes, and identify jurisdictional leverage points is central to its success.

Clients trust Sidley because it doesn’t just arbitrate cases—it builds outcomes through meticulous case theory, expert evidence, and negotiation strategy. Whether enforcing awards or defending claims, Sidley’s international arbitration teams are renowned for integrity, discretion, and a relentless focus on winning.

Sidley Austin is widely regarded as a market leader in healthcare and life sciences law, offering sophisticated legal counsel to pharmaceutical companies, medical device manufacturers, healthcare providers, and biotech innovators. The firm’s FDA regulatory practice is one of the most comprehensive in the industry, guiding clients through product approvals, compliance audits, labeling issues, and post-market enforcement risks.

Sidley’s transactional lawyers support M&A, joint ventures, and strategic partnerships within the healthcare sector, while its litigators defend clients in False Claims Act suits, whistleblower cases, and government investigations. The firm is frequently called upon to represent clients in front of agencies such as the FDA, CMS, HHS OIG, and the DOJ, reflecting a trusted track record with regulators.

In a highly regulated and rapidly evolving sector, Sidley’s healthcare team stands out for its cross-disciplinary approach. It merges regulatory insight, corporate experience, and litigation strength to help clients bring innovations to market, manage legal risk, and maintain operational compliance globally.

Sidley Austin has one of the preeminent appellate practices in the United States, regularly handling cases before federal and state appellate courts, including the U.S. Supreme Court. The firm has argued over 125 Supreme Court cases, a record that few firms in the world can rival. Its lawyers are known for crafting persuasive appellate briefs, deep constitutional analysis, and oral advocacy that shapes legal precedent.

The appellate team includes former U.S. Solicitors General, Supreme Court clerks, and veteran litigators who bring unmatched experience and insight. Sidley is often retained for complex appeals involving securities law, administrative law, constitutional issues, and business torts.

Clients rely on Sidley not just to win appeals, but to reshape the legal landscape. Whether stepping in after trial or advising from the outset on appeal strategy, the firm’s appellate lawyers work closely with trial teams to ensure consistency, preserve key issues, and pursue the most impactful outcomes at the highest levels of judicial review.

Sidley Austin is a top choice for global financial institutions due to its commanding expertise in banking law, capital markets, regulatory compliance, derivatives, and financial litigation. The firm advises many of the world’s largest banks, investment firms, and fintech companies on legal and regulatory issues impacting complex financial products and cross-border transactions.

Sidley’s Financial Services Regulatory Practice provides counsel on evolving frameworks like Dodd-Frank, Basel III, MiFID II, and ESG compliance, helping institutions meet demanding regulatory requirements while pursuing strategic goals. The firm also defends financial institutions in investigations by the SEC, CFTC, FINRA, and international authorities.

In a globalized financial system, Sidley’s international network allows it to guide clients through multi-jurisdictional financings, enforcement actions, and restructurings. Its lawyers are valued not only for their legal fluency but for their ability to anticipate regulatory shifts and align legal strategies with business imperatives.

Sidley Austin provides cutting-edge legal counsel to clients in the energy and environmental sectors, with significant experience in renewable energy, oil & gas, utilities, infrastructure, and environmental litigation. The firm represents multinational corporations, developers, and government entities in regulatory compliance, project finance, and environmental risk management.

Its Energy Regulatory Practice handles proceedings before the FERC, DOE, EPA, and international regulators, advising on everything from emissions standards to market entry for clean energy technologies. Sidley lawyers also advise on ESG reporting, climate-related disclosures, and sustainable finance—a growing area of legal scrutiny.

Sidley is particularly well-positioned to handle complex, multi-agency regulatory matters and environmental disputes. Whether representing a renewable energy developer in a billion-dollar wind project or defending a utility in environmental enforcement litigation, the firm delivers a strategic, legally sound approach informed by decades of industry experience.

Sidley Austin is a global authority in privacy and data security law, advising clients on compliance with major regulatory regimes including GDPR, CCPA, HIPAA, and cross-border data transfer frameworks. The firm’s Privacy and Cybersecurity Practice is frequently recognized by The Legal 500 and Chambers for its ability to guide clients through the most sensitive and high-stakes digital risks.

Sidley advises multinational corporations on data breach responses, internal investigations, cybersecurity governance, and regulatory enforcement defense. Its lawyers have represented clients before data protection authorities across North America, Europe, and Asia, helping mitigate risk and maintain reputational integrity during crisis events.

Sidley also plays a key role in shaping data policy, with several lawyers involved in advisory roles for governments and international standards bodies. This positions the firm at the forefront of regulatory development, compliance strategy, and emerging technology governance, making it a go-to firm for global data-centric organizations.

Sidley Austin LLP is at the forefront of advising clients on Environmental, Social, and Governance (ESG) legal strategies, offering multidisciplinary expertise that spans regulatory compliance, corporate governance, investor relations, and sustainability disclosure obligations. As ESG moves to the top of boardroom agendas globally, Sidley helps clients navigate evolving laws, stakeholder expectations, and reputational risks.

The firm counsels public companies, asset managers, and financial institutions on frameworks such as the EU Taxonomy, SEC’s climate-related disclosure rules, and voluntary standards like TCFD and ISSB. It also supports clients in structuring ESG-linked financial instruments, developing supply chain governance policies, and responding to shareholder activism and regulatory inquiries.

Sidley’s cross-office ESG working group integrates lawyers from its environmental, securities, corporate, and litigation teams to deliver cohesive strategies. With increasing scrutiny from regulators and investors, clients turn to Sidley for ESG solutions that are legally sound, business-aligned, and globally informed.

Clients seeking world-class legal representation can contact Sidley Austin LLP through multiple channels. The firm welcomes inquiries from corporations, financial institutions, governments, and entrepreneurs needing guidance on complex transactions, litigation, regulatory issues, or strategic counsel.

To begin a consultation, clients may reach the firm via its official website at www.sidley.com, where they can access attorney bios, practice area details, and office contact pages. For direct inquiries, clients can also email info@sidley.com or call the main switchboard at +1 312 853 7000.

With 21 offices globally, Sidley ensures prompt, localized, and multilingual support. Whether you’re navigating a regulatory challenge, planning a corporate acquisition, or responding to litigation, the firm’s responsive client service teams will connect you to the right legal specialists.