Jessica Cooney

Jessica Cooney is a Partner in the Firm’s Mergers and Acquisitions Practice, based in Boston. She advises private equity sponsors across a broad spectrum of transactions, including mergers and acquisitions, leveraged buyouts, minority investments, add-ons, PIPEs, co-investments, hybrid capital transactions and take-privates. Her experience spans several industries, including manufacturing, technology, infrastructure and healthcare. She also counsels clients on general corporate and governance matters and represents public and private companies in strategic mergers and acquisitions.

Jess has been recognized for her client service by BTI Consulting Group and was recently named one of Best Lawyers’ “Ones to Watch in America 2026” for her work in corporate governance and compliance and mergers and acquisitions.

Notable experience prior to joining Simpson Thacher includes advising:

• H.I.G. Capital in numerous transactions, including in its acquisitions of: International Aerospace Coatings, a leading global provider of aircraft painting solutions for original equipment manufacturers, major airlines and operators; Tower Engineering Professionals, a leading full-service provider of engineering and maintenance services to tower, mobile network and other telecom infrastructure customers; Best Trash; Inventus Power; Time Manufacturing; Brooks Safety Solutions; Wastequip; and its $950 million carve-out acquisition of the distribution business of Avient Corp. and creation of Formerra
• Bain Capital in numerous transactions, including in its: $5.6 billion take-private acquisition of PowerSchool; $4.5 billion take-private acquisition of Envestnet, a provider of integrated technology, intelligent data and wealth solutions; growth investment in Power Home Remodeling, a leading exterior home remodeler
• The Michaels Companies in its take-private acquisition that valued Michaels at an enterprise value of $5 billion
• Astra, a rocket launch startup that provides satellite delivery service, in its acquisition of Apollo Fusion, a leading electric propulsion engine manufacturer, and in its $2.1 billion business combination with Holicity
• Milacron Holdings Corp. in its $2 billion cash and stock merger with Hillenbrand, Inc.
• Surgery Partners, a healthcare services company, in several transactions, including in its: $400 million senior unsecured notes offering; acquisition of National Surgical Healthcare, an owner and operator of surgical facilities in partnership with local physicians, and its related issuance of new preferred stock to Bain Capital and a $370 million senior unsecured notes offering
• New Mountain Capital in its acquisition and subsequent sale of Cumming Group, a leading independent pure-play provider of project management and cost management advisory services
• Universal Fiber Systems in its acquisition of Fiber Innovation Technology (FIT), a manufacturer of specialty fiber products for industrial, apparel and home furnishing applications
• Kohlberg & Company and its portfolio company MarketCast in the acquisition of Fizziology LLC, a social insights and analytics company in the media and entertainment space

Jess earned her J.D. from Northeastern University School of Law in 2014 and her B.S. from Lehigh University in 2010. She is admitted to practice in Massachusetts and New York.