Articles
5 Strategies for Effective AI Governance
1. Map the Risk Landscape Effective AI governance begins with a comprehensive, clear-eyed assessment of where and how the company …
May 26, 2026
May 26, 2026 • 2-minute read
Partner
Mergers & Acquisitions and Capital Markets
“The most gratifying aspect of my practice is to help clients achieve their goals. It’s all about identifying issues and resolving them in a manner to promote my client’s objectives, which often requires a great deal of creativity.”
Sebastian Tiller is Head of Vinson & Elkins’ Strategic Mergers & Acquisitions practice. Sebastian represents corporations, private equity firms and financial advisers in a range of mergers & acquisitions transactions and corporate governance matters. He has deep experience representing public and private companies in multi-billion dollar strategic mergers & acquisitions and has closed high-profile transactions in the financial services, technology, energy and consumer goods industries, among others.
Sebastian has been recognized by IFLR1000 as a “Notable Practitioner” in M&A. He is fluent in German and French and was educated in Europe and the U.S.
GardaWorld in its acquisitions of OnSolve, WorldAware, Whelan Security and Stealth Monitoring, and in its C$5.2 billion recapitalization by BC Partners and subsequent C$13.5 billion recapitalization by members of management and HPS Investment Partners
Clariant AG in its $810 million acquisition of Lucas Meyer Cosmetics
L3Harris in its $1 billion partnership with the US Department of War, $845 million sale of a controlling interest in its Space Propulsion and Power Systems business, $4.7 billion acquisition of Aerojet Rocketdyne and $33.5 billion merger with Harris Corporation
Corsair Capital in its acquisitions of TreviPay and investments in Miracle Mile Advisors, HungerRush, Aurora Payments, IDIQ® and Oakbridge Insurance Agency
The Mosaic Company in its agreement to sell its stake in Ma’aden Wa’ad Al Shamal Phosphate Company to Ma’aden and acquisition of the Vale Fertilizantes business from Vale S.A. for an aggregate purchase price of $2.1 billion
TCF Financial Corporation in its $22 billion merger with Huntington Bancshares Incorporated and $3.5 billion merger of equals with Chemical Financial Corporation
People’s United Financial in its $7.6 billion merger with M&T Bank Corporation
Ahold in its $29 billion merger of equals with Delhaize Group
Lorillard in its $29.25 billion sale to Reynolds American
L3Harris in its $1 billion partnership with the US Department of War, $845 million sale of a controlling interest in its Space Propulsion and Power Systems business, $4.7 billion acquisition of Aerojet Rocketdyne and $33.5 billion merger with Harris Corporation
BMC Stock Holdings in its merger with Builders FirstSource
Office Depot in its merger of equals with OfficeMax
Best Buy in its acquisition of GreatCall
Lorillard in its $29.25 billion sale to Reynolds American
Special Committee of the Board of SunPower in its spin-off of SunPower and Maxeon Solar Technologies, and the sale of its Commercial & Industrial Solutions business to TotalEnergies
Special Committee of Speedway Motorsports with its acquisition by Sonic Financial Corporation
Special Committee of Convey in its definitive merger agreement to be acquired by TPG Capital
Clariant AG in its $810 million acquisition of Lucas Meyer Cosmetics
The Mosaic Company in its agreement to sell its stake in Ma’aden Wa’ad Al Shamal Phosphate Company to Ma’aden and acquisition of the Vale Fertilizantes business from Vale S.A. for an aggregate purchase price of $2.1 billion
Grupo Nutresa in multiple unsolicited tender offers undertaken in Colombia by Nugil and IHC Capital Holding and their activist campaign to gain control of Nutresa
Laureate Education in the sales of its Brazilian operations to Ser Educacional (R$3.862 billion) and Walden University to Adtalem Global Education ($1.48 billion)
Spotify in its equity investment transactions with Tencent
Tyco International plc in the sale of its security business in South Africa to Fidelity Security Group
GardaWorld in its acquisitions of OnSolve, WorldAware, Whelan Security and Stealth Monitoring, and in its C$5.2 billion recapitalization by BC Partners and subsequent C$13.5 billion recapitalization by members of management and HPS Investment Partners
Ahold in its $29 billion merger of equals with Delhaize Group
Vivendi in its €2.8 billion acquisition of GVT (Holding) SA
Aluminum Corporation of China in its acquisition of a minority stake in Rio Tinto
Rinker Group Limited in its $14 billion acquisition by Cemex S.A.B. de C.V.
Oakbridge Insurance Agency in its investment by Audax Private Equity
Centerbridge Partners in, among other matters, its investment in Banc of California in connection with the merger of Banc of California with PacWest Bancorp
Bayview Asset Management in connection with TIAA’s sale of TIAA Bank to, among other investors, Bayview
First Eagle Alternative Capital BDC in its sale to Crescent Capital BDC
Corsair Capital in its acquisitions of TreviPay and investments in Miracle Mile Advisors, HungerRush, Aurora Payments, IDIQ® and Oakbridge Insurance Agency
TCF Financial Corporation in its $22 billion merger with Huntington Bancshares Incorporated and $3.5 billion merger of equals with Chemical Financial Corporation
People’s United Financial in its $7.6 billion merger with M&T Bank Corporation
IBERIABANK in its $3.9 billion merger of equals with First Horizon
New Mountain Capital in its acquisition of the majority stake in One Digital Health and Benefits
TD Bank Financial Group in its acquisition of The South Financial Group
JPMorgan as financial advisor in multiple transactions, including in Eastern Bankshare’s merger with Cambridge Bancorp, Valley National Bankcorp’s acquisition of Oritani Financial, Legacy Texas Financial’s merger with Prosperity Bancshares, First Midwest’s merger with Old National, Eastern Bankshares’s acquisition of Century Bancorp, CIT Group’s acquisition of Omaha Bank, GreenSky’s $2.24 billion sale to Goldman Sachs, and Umpqua Holdings in its all-stock business combination with Columbia Banking System
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Articles
5 Strategies for Effective AI Governance
1. Map the Risk Landscape Effective AI governance begins with a comprehensive, clear-eyed assessment of where and how the company …
May 26, 2026
May 26, 2026 • 2-minute read
Client Alerts
Delaware Court of Chancery Upholds Removal of “Imperious” CEO Under DGCL Section 225
On April 20, 2026, Vice Chancellor J. Travis Laster issued a post-trial opinion in DSM HoldCo, Inc. v. Demoulas, C.A. No. 2025-1020-JTL (Del. Ch. Apr. 20, 2026), an action brought under 8 Del. C. § 225(a) by the parent holding company (the “Company”) of the Market Basket grocery chain, its operating subsidiary Demoulas Super Markets, Inc., and three independent directors—Jay K. Hachigian, Steven J. Collins, and Michael Keyes (the “Current Directors”)—against Arthur T. Demoulas (“Demoulas”), the Company’s longtime President and CEO.
May 18, 2026
May 18, 2026 • 10-minute read
Client Alerts
A playbook for preparing for, responding to and mitigating short seller campaigns A “short attack” is a campaign in which …
February 5, 2026
February 5, 2026 • 5-minute read
Client Alerts
White House Executive Order Targets Proxy Advisory Firms and Signals Heightened Regulatory Scrutiny
On December 11, 2025, President Donald J. Trump signed an executive order titled “Protecting American Investors from Foreign-Owned and Politically-Motivated Proxy Advisors.”
December 12, 2025 • V&E Shareholder Engagement Update
December 12, 2025 • 4-minute read
Event Recaps
Fifth Annual Navigating the Annual Meeting and Reporting Season
Our panelists will discuss recent SEC developments that shape—and the practical considerations that inform—the preparation of public companies’ annual reports and annual shareholder meetings.
November 12, 2025
November 12, 2025 • 1-minute read
Deals & Cases
Vinson & Elkins Represents Educational Testing Service on Acquisition of ACT
Vinson & Elkins represented Educational Testing Service (ETS) in connection with its acquisition of ACT, one of the most widely …
July 1, 2026
July 1, 2026 • 1-minute read
Awards & Rankings
The Legal 500 US 2026 recommended Vinson & Elkins as a leading law firm in 47 practice categories. In total, …
June 10, 2026
June 10, 2026 • 3-minute read
Deals & Cases
Vinson & Elkins is representing Lazard as lead financial advisor, and Bank of America as financial advisor, to NextEra Energy, …
May 19, 2026
May 19, 2026 • 1-minute read
Deals & Cases
Vinson & Elkins Advises L3Harris on Partnership with US Department of War
Vinson & Elkins is representing L3Harris Technologies (NYSE: LHX) in connection with its announced first-of-its-kind proposed partnership with the US …
January 13, 2026
January 13, 2026 • 1-minute read
Deals & Cases
Vinson & Elkins Represents J.P. Morgan in SABIC’s $450 Million ETP Divestiture
Vinson & Elkins represented J.P. Morgan, as financial advisor to The Saudi Basic Industries Corporation (SABIC) in connection with the …
January 12, 2026
January 12, 2026 • 1-minute read
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