Ahsan M. Barkatullah is a partner in Wachtell Lipton’s Corporate Department. His practice focuses primarily on mergers and acquisitions, carve-outs, private equity transactions and securities laws matters.

Ahsan received an A.B. summa cum laude from Princeton University. He received his J.D. from the Yale Law School, where he was Submissions Editor of the Yale Journal on Regulation and Articles Editor of the Yale Journal of International Law. Ahsan also received an A.M. in Government from Harvard University.

Selected representations include:

Energy, Mining, Industrials

• Teck Resources in its pending $69 billion merger of equals with Anglo American
• Viper Energy in its $4.1 billion acquisition of Sitio Royalties
• EOG Resources in its $5.6 billion acquisition of Encino Energy
• Viper Energy in its $1.1 billion acquisition of certain mineral and royalty interest-owning entities from Tumbleweed Royalty IV
• ConocoPhillips in its $22.5 billion all-stock acquisition of Marathon Oil
• Diamondback Energy in its $28 billion merger with Endeavor Energy Resources
• APA Corporation in its $4.5 billion all-stock acquisition of Callon Petroleum Company
• Hess Corporation in its $60 billion all-stock acquisition by Chevron Corporation

Healthcare, Pharmaceuticals and Health Services

• Abbott Laboratories in its pending $22 billion acquisition of Exact Sciences
• Mallinckrodt plc in its $6.7 billion combination with Endo, Inc.
• Inari Medical in its $4.9 billion sale to Stryker Corporation
• Pfizer in its:
  • $43 billion acquisition of Seagen
  • $5.4 billion acquisition of Global Blood Therapeutics
  • sale of Meridian Medical Technologies to Altaris Capital Partners
• NuVasive in its all-stock combination with Globus Medical
• Medline in its sale of a majority interest to Blackstone, Carlyle, and Hellman & Friedman

Technology and Telecommunications

• Dayforce in its $12.3 billion sale to Thoma Bravo
• Motorola Solutions in its acquisition of Silvus Technologies for $4.4 billion
• OneTrust in the sale of its compliance and ethics business to EQS Group
• Tech Data, a portfolio company of Apollo, in its $7.2 billion combination with Synnex
• United Technologies in its separation into three independent public companies, forming Otis Worldwide Corp. and Carrier Global Corporation
• Salesforce in its $6.5 billion acquisition of MuleSoft

Private Equity

• The Carlyle Group in its acquisition of bluebird bio, Inc
• Apollo Funds in various transactions, including:
  • in connection with Legendary Entertainment’s buyout of Wanda Group’s remaining equity interest
  • $760 million equity investment in Legendary Entertainment
  • $6 billion acquisition of Tech Data Corporation
• Warburg Pincus as the leader of a consortium of investors in their acquisition of Exeter Finance LLC

Financial Services, Financial Technology and Banking

• Global Payments in its  $24.25 billion acquisition of Worldpay from FIS and GTCR and concurrent $13.5 billion sale of Global Payments’ Issuer Solutions business to FIS, the largest financial institutions transaction of 2025
• Wells Fargo in its agreement to sell the non-Agency third-party servicing segment of its Commercial Mortgage Servicing business to Trimont
• Webster Financial Corporation in its $350 million acquisition of Ametros Financial Corp
• CapStar Financial Holdings, Inc. in its:
  • $344 million acquisition by Old National Bancorp
  • $85 million acquisition of FCB Corporation and The Bank of Waynesboro
• Capital One Ventures in its $25 million investment in Inspirato Incorporated
• American International Group in its $4.5 billion sale of its Validus Re business to RenaissanceRe Holdings Ltd
• National Bank Holdings Corporation and NBH Bank in NBH Bank’s acquisition of Cambr from StoneCastle Partners
• Webster Financial in its acquisition of interLINK
• AllianceBernstein and AllianceBernstein Holdings in their $750 million acquisition of CarVal Investors
• Invesco in its $5.7 billion acquisition of OppenheimerFunds from MassMutual

Consumer, Retail and Industrial

• Unilever in the $44.8 billion combination of its Foods business with McCormick through a Reverse Morris Trust
• Altria in its joint venture with Japan Tobacco for the U.S. marketing and commercialization of heated tobacco stick products
• Prysmian in its $4.2 billion acquisition of Encore Wire
• 3M Company:
  • the $9.6 billion spin-off of its healthcare business, Solventum Corporation
  • the combination of its Food Safety business with Neogen Corporation
• Westrock Coffee Company in its $1.1 billion business combination with Riverview Acquisition
• PPG in its €1.5 billion acquisition of Tikkurila
• Edgewell Personal Care in its $235 million acquisition of Cremo Holding Company
• WH Smith plc in its $198 million acquisition of InMotion Entertainment Holdings
• SUPERVALU in its $2.9 billion sale to UNFI