Sullivan & Cromwell LLP (S&C) is one of the most prestigious and elite “White Shoe” law firms in the world. Headquartered in New York City, its client roster is iconic, bridging legendary industrial giants and Wall Street institutions with cutting-edge tech disruptors and sovereign nations.
Because S&C focuses heavily on massive mergers and acquisitions (M&A), capital markets, corporate governance, and high-stakes white-collar defense, its client list is constantly adapting.
1. Major Technology & Big Tech Clients
S&C has become a premier advisory firm for monumental tech acquisitions, restructurings, and financing maneuvers.
- Elon Musk & Group Entities: S&C has deeply embedded relationships here, advising X (formerly Twitter) and xAI, including representing them in the historic $113 billion merger of xAI and X.
- SpaceX: Advised on major structural movements, including its high-profile $250 billion integration with xAI.
- Broadcom: Assisted in structuring a massive $35 billion capital solution alongside Apollo and Blackstone to accelerate AI compute infrastructure for Anthropic.
- ProLogium: Advised the advanced battery manufacturer on its multi-billion dollar business combination with Translational Development Acquisition Corp.
2. Global Financial Institutions
Historically rooted as a Wall Street powerhouse, S&C frequently represents the world’s largest banks, investment firms, and credit entities.
- Goldman Sachs: A long-standing, institutional client for which S&C handles complex international joint ventures, compliance, and regulatory structural shifts.
- BNP Paribas: Represented the banking giant in its $16.3 billion sale of Bank of the West to BMO Financial Group.
- Capital One / Discover: Handled the landmark $35.3 billion merger combining Discover and Capital One.
- Bank of Montreal (BMO) & Bank of Ireland: Routinely trusted for multi-billion dollar SEC-registered notes offerings and capital market distribution.
- UBS / Credit Suisse: Steered the historic, government-backed emergency acquisition of Credit Suisse by UBS during the banking crisis.
- SVB Financial Group: Successfully guided the entity through its intricate Chapter 11 bankruptcy restructuring plan.
3. Consumer, Retail, & Luxury Goods
- Tiffany & Co.: Represented the iconic jeweler in its blockbuster $16 billion acquisition by luxury conglomerate LVMH.
- Subway: Guided the fast-food giant through its massive acquisition by Roark Capital.
- The Goodyear Tire & Rubber Company: Handled the $905 million divestiture of its Off-the-Road tire division to Yokohama Rubber.
4. Automotive, Industrial, & Aerospace
- Boeing: Advised the aerospace giant in its critical $8.3 billion acquisition of Spirit AeroSystems.
- Stellantis: Managed the complex $60 billion cross-border, 50/50 merger between Fiat Chrysler Automobiles and Peugeot to create the modern auto conglomerate.
- Amgen: Guided the pharmaceutical heavyweight through its massive $27.8 billion acquisition of Horizon Therapeutics.
- Canadian Pacific Railway: Advised on its historic $31 billion acquisition of Kansas City Southern, linking Canada, the US, and Mexico via rail.
5. High-Net-Worth Individuals, Sports, & Media
S&C’s prominent Estates & Personal practice quietly represents some of the world’s most powerful families, sports franchises, and trusts.
- The Mara and Tisch Families: Represents the billionaire owners of the NFL’s New York Giants in high-value asset matters regarding MetLife Stadium.
- The Murdoch Family Trust (Cruden Financial Services): Advised during high-profile, multi-billion dollar restructuring and trust execution battles.
- The Khosla Family: Handled personal investment strategies, including transactions involving the San Francisco 49ers.
- Pershing Square (Bill Ackman): Advised on massive, multi-billion dollar dual IPO structures for Pershing Square USA and Pershing Square Inc.
The S&C Strategy: S&C famously maintains a relatively small headcount compared to other global mega-firms, preferring a lean, highly integrated “generalist” model where partners handle a client’s overarching strategic needs rather than just niche problems.
