Steven A. Seidman is a partner and Co-Chair of the Corporate & Financial Services Department. Steven focuses on corporate governance advice, mergers and acquisitions, private equity, and general corporate and securities law.

Chambers USA (2005-2024) ranks Steven among the leading individuals practicing Corporate/M&A Law in New York. He has been recognized by The American Lawyer as one of its “Dealmakers of the Year” in both 2024 and 2015, and was named by The Deal as a 2022 finalist for Most Outstanding Dealmaker of the Year. In addition, Steven advised on one of the most high-profile deals of 2022, representing Alleghany Corporation in its successful $11.6 billion acquisition by Berkshire Hathaway. 


Mergers and Acquisitions – Metropolis Technologies, Inc. in its approximately $1.5 billion take-private acquisition of SP Plus Corporation; Lakeside Book Company in its acquisition of Marquis Book Printing, Inc.; Alleghany Corporation in its $11.6 billion acquisition by Berkshire Hathaway; Capital Senior Living in transactions with Conversant Capital, successfully ending a proxy contest by Ortelius Advisors; The Special Committee of the Board of Directors of Blockcap in connection with its acquisition by Core Scientific Holding; Successful proxy contest at Verso, Inc.; The Special Committee of the Board of AmTrust Financial Services, Inc. in the sale to Stone Point Capital, the CEO and the Karfunkel Family; Alleghany Corporation in the sale of Pacific Compensation Insurance Company to CopperPoint Mutual Insurance Company; Allied World in its acquisition by Fairfax Financial for $4.9 billion in cash and stock; GrafTech International in its sale to an affiliate of Brookfield Asset Management; The Pantry in its $1.7 billion sale to Alimentation Couche-Tard; Men’s Wearhouse in its rejection of the $2.3 billion unsolicited buyout bid from Jos. A Bank Clothiers, Inc. and in its subsequent $1.8 billion unsolicited acquisition of Jos. A. Bank (and earlier buyout bids of approximately $1.6 billion and $1.78 billion); Mueller Industries and Atlas Holdings in the acquisition of Tecumseh Products; Homesite Group, Inc. in its sale to American Family Insurance; Arbor Realty Trust Special Committee in connection with its pending acquisition from external manager; Men’s Wearhouse in its acquisition of Joseph Abboud and proposed disposition of K&G Men’s Company; Ventas, Inc. in connection with its acquisition of Cogdell Spencer Inc.; the Special Committee of the Board of Directors of Taro Pharmaceutical Industries Ltd. in connection with Taro's proposed buyout by Sun Pharmaceutical Industries Ltd.; Cablevision independent directors in connection with the spin-off of the Madison Square Garden business; Response Genetics in its successful proxy contest settlement; FiberNet Telecom Group sale to Zayo Group; JEN Partners acquisition of Tax Credit Equity business of MMA Financial; Mediacom Communications Special Committee in connection with spin-off to Morris Communications; Allied World Assurance Company Holdings, Ltd acquisition of Darwin Professional Underwriters, Inc. and share repurchase from founding shareholder AIG; Scientific Games, Inc. acquisition of Oberthur Gaming; Macklowe Property’s bid (with Carl Icahn) to acquire Reckson Associates Realty Corp.; Acquisition by Ventas, Inc. of 67 healthcare properties from various Reichmann family entities; Bid by Oriole Partnership (comprised of Essex Property Trust, UBS Wealth Management and AEW) to acquire The Town and Country Trust; Sale of Eon Labs, Inc. to Novartis AG in connection with Hexal AG merger; Sale of Fortunoff to Trimaran Capital Partners/K Group; Sale of GovPX, Inc. to ICAP plc.; The Simon Property Group's bid to acquire Taubman Centers, Inc., its acquisition of Corporate Property Investors, Inc., its acquisitions from the New England Development Company and its partial acquisition of Rodamco N.A.; General Investment & Development Co. in connection with Post Properties proxy contest; Mannesmann AG and Olivetti S.p.A.'s acquisition of Cellular Communications International, Inc.

Private Equity: Public and Private – Flagstone Foods, a portfolio company of Atlas Holdings, in its acquisition of Emerald Nuts from Campbell Soup Company; Stone Point Capital in the formation of an independent Managing General Agency with AIG; Blue Wolf Capital Partners in its acquisition of Sterling Site Access Solutions; Marcal Paper, a portfolio company of Atlas Holdings, in its acquisition of von Drehle Corporation; Atlas Holdings in its acquisition of LSC Communications; Blue Wolf Partners in its acquisition of Colson Group; Stone Point Capital in its acquisition of SambaSafety; Atlas Holdings in its acquisition of Permasteelisa; Atlas Holdings in its acquisition of the Snacks Division of TreeHouse Foods; Atlas Holdings in its acquisition of International Wire Group Holdings and its subsequent sale of a majority stake in the company to Olympus Partners; W&W|AFCO Steel in its acquisition of Hirschfeld Industries; Alleghany Capital Corporation investment in W&W|AFCO Steel; Allied World Assurance in the sale of Vault Insurance to Cornell Capital and Hudson Structured Capital; Stone Point Capital in its exchange agreement with Enstar involving Atrium and StarStone U.S.; Allied World Financial Services recapitalization and acquisition of majority ownership interest in Cunningham Lindsey Group; DLJ Merchant Banking Partners investment in Landis+Gyr Holdings AG and acquisition of a controlling interest in Den-Mat Holdings, LLC and RathGibson, Inc.; Atlas Holdings acquisition of Finch, Pruyn & Company, Inc. and the simultaneous partial disposition of woodlands to The Nature Conservancy and hydrofacilities to Brookfield Power; Greenstreet Equity Partner’s acquisition of TECO Transport Corporation from TECO Energy, Inc.; MatlinPatterson Global Advisers, LLC acquisition of Southeast Generation Portfolio from Duke Energy; Warburg Pincus LLC and Credit Suisse First Boston in connection with a significant number of investments and dispositions, including Storage Mart Partners, L.L.C., Price Enterprises, Inc., Aircast, Inc., Sonus Networks, Inc. and Wall Homes, Inc.

Financial Advisor RepresentationsSolomon Partners as financial advisor to the Special Committee of SiriusXM in connection with the split-off of SiriusXM by Liberty Media Corporation; BofA Securities and Morgan Stanley & Co. LLC, as financial advisors to Kansas City Southern in KCS’s $30 billion combination with Canadian Pacific Railway; BofA Securities as financial advisor to South Jersey Industries, Inc. in its approximately $8.1 billion acquisition by the Infrastructure Investments Fund (of J.P. Morgan Investment Management Inc.); BofA Securities as financial advisor to Knoll, Inc. in connection with Knoll’s $1.8 billion combination with Herman Miller, Inc.; Centerview Partners and PJT Partners as financial advisors to Mylan in its agreement to combine with Upjohn, Pfizer's off-patent branded and generic medicines business; Centerview Partners in connection with Tesaro's acquisition by GlaxoSmithKline for $5.1 billion, NeuroDerm’s acquisition by Mitsubishi Tanabe Pharma Corp, Salix Pharmaceuticals’ sale to Valeant Pharmaceuticals, Ventas, Inc.’s acquisition of Nationwide Health Properties, Inc. and the sale of data center properties to Digital Realty Trust; Bank of America Merrill Lynch in connection with the sale of Pike Corporation, bidding for Sprint Nextel Corp., the acquisition by Berkshire Hathaway and 3G Capital of H.J. Heinz Company, UnitedHealth Group’s merger with Amil Participações S.A., Gilead Sciences, Inc.’s acquisition of CV Therapeutics, Inc., the sales of Basic Chemical Solutions to Univar and Ashland Inc.’s distribution business to TPG Capital, OAO Severstal’s acquisition of Sparrows Point steel mill, PAETEC Corp.'s merger with US LEC Corp. and its acquisition of McLeodUSA, EMC Corporation’s acquisition of RSA Security Inc., Boston Scientific’s acquisition of Guidant, Inc., Special Committee of the Sports Authority, Inc. in connection with its sale, Neoforma’s sale to Global Healthcare Exchange, LLC., ALLTEL’s acquisition of Western Wireless, Quest Diagnostics acquisition of LabOne, Inc., the sale of Intelsat, Ltd.; BofA Securities in connection with Progenics Pharmaceuticals’ amended merger transaction with Lantheus Holdings; UBS in connection with the purchase by Extra Space Storage and Prudential Financial of Storage USA, and Fairmont Hotels in connection with its sale; Peter J. Solomon Company in connection with the management buyout of American Greetings Corporation, Cost Plus Inc.’s acquisition by Bed Bath & Beyond Inc., Phillips-Van Heusen Corporation’s acquisition of Tommy Hilfiger B.V., Walgreen Co.’s acquisition of Duane Reade Holdings Inc., Hollywood Media Corp.’s proposed sale of its Broadway Ticketing Division, Tween Brands, Inc.’s merger with Dress Barn, Inc., The J.Jill Group’s sale to Talbot’s Inc., and Barnes & Noble’s spin-off of GameStop Corp.; Goldman, Sachs in connection with the proposed acquisition of Silver Bay Realty Trust Corp. by Tricon Capital and acquisition of Glenborough Realty Trust by Morgan Stanley Real Estate; Citigroup in connection with Stryker Corporation’s pending acquisition of MAKO Corp.



University of Virginia School of Law, J.D., 1990 Yale University, B.A., 1987

Bar Admissions

New York, 1991


Jacobs, Jack B., Delaware Court of Chancery, 1990-1991

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