Sebastian Tiller

Sebastian is a Partner in Simpson Thacher’s New York office and a member of the Firm's Corporate Department. He also serves on the Firm’s Finance Committee. Sebastian’s practice concentrates on merger and acquisition transactions and corporate governance matters. He has extensive experience representing corporations, private equity firms and financial advisers in a range of transactions. 

Selected M&A transactions in the financial services sector on which Sebastian has worked include the representation of: 

• 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
• People’s United Financial in its announced $7.6 billion merger with M&T Bank Corporation
• IBERIABANK in its $3.9 billion merger of equals with First Horizon
• TCF Financial Corporation in its $3.5 billion merger of equals with Chemical Financial Corporation
• New Mountain Capital in its acquisition of the majority stake in One Digital Health and Benefits
• Sumitomo Life Insurance Company in its $3.8 billion acquisition of Symetra Financial Corporation
• TD Bank Financial Group in its acquisition of The South Financial Group
• JPMorgan as financial advisor in multiple recent 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

Selected cross-border deals on which Sebastian has worked include advising:

• Clariant AG in its $810 million acquisition of Lucas Meyer Cosmetics
• Mosaic Company in its agreement to sell its stake in Ma’aden Wa’ad Al Shamal Phosphate Company to Ma’aden
• 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 and Whelan Security, and in its C$5.2 billion recapitalization by BC Partners
• The Mosaic Company in its acquisition of the Vale Fertilizantes business from Vale S.A. for an aggregate purchase price of $2.1 billion 
• 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. 

Other strategic M&A transactions on which Sebastian has worked include the representation of:

• L3Harris in its $4.7 billion acquisition of Aeorojet Rocketdyne
• BMC Stock Holdings in its merger with Builders FirstSource
• L3 Technologies in its $33.5 billion business combination with Harris Corporation 
• 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 
• Harsco Corporation in its acquisitions of Stericycle’s Environmental Solutions Business, Clean Earth, Inc., and in its sale of Industrial Air-X-Changer business
• 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

Sebastian joined the Firm in 2005 and became a Partner in 2016. He passed his first and second state exams in law in 2001 and 2003 and received his Dr. jur. (German Ph.D. equivalent), summa cum laude, in 2005, from Ludwig-Maximilians-Universität München.  Sebastian also received his LL.M. from New York University School of Law in 2005 where he was an Arthur T. Vanderbilt Scholar. He also passed his Licence en Droit, mention très bien, in 1998 at Université Paris II - Panthéon Assas.