
Corporate M&A
Private Equity
Corporate Governance
Johanna Mayer is a Partner at Simpson Thacher & Bartlett in New York City, specializing in mergers and acquisitions, private equity, and corporate transactions. With a JD from Columbia Law School and an AB from Princeton University, Johanna has extensive experience advising prominent private equity sponsors, financial institutions, and corporations on complex cross-border transactions. Her notable clients include KKR, New Mountain Capital, and SiriusXM. Johanna's expertise spans various industries, including media, technology, healthcare, and financial services. She has played a key role in significant deals such as KKR's acquisition of PharMerica and SiriusXM's acquisition of Pandora.
Corporate Mergers and Acquisitions
Investment Funds and Transactions
Retail and Consumer Products
Manufacturing and Industrials

- Salute acquired the target/assets from Keysource in a acquisition on not available. - Deal value was 3200000000 Sector: Data Centre Solutions; Location: Europe. - On the acquirer side, not available advised, led by Chris Vallance, Johanna Mayer, Andrew Cho, James Evelegh, Simon Teich, Leo Hutchings, Etienne Renaudeau, Peter Guryan, Josh Buckland, Jamie Logie, Luke Cowdell, Andrew Purcell, Caleb McConnell, Tim Wells, Adam Hersch, Roberto Arza, Shahpur Kabraji, Benjamin Persina, Tilly Kersley, Jennifer Falconer Hall, Alysha Sekhon, Chandler Gerard-Reimer.
Jan 29 2025
3B
Private Equity
Partner
2023 – Unknown
Associate
2014 – 2023
Legal Extern
2013 – 2014
Summer Associate
2013 – 2013


- KKR acquired Varsity Brands, Inc. from Varsity Brands, Inc. in a acquisition on 2024-08-26. - Deal value was 47500000000 (source: AI Estimation) Sector: Sports; Location: USA. - On the acquirer side, Simpson Thacher & Bartlett advised, led by Ravi Purushotham, Marni Lerner, Johanna Mayer, Brian Steinhardt, Patrick Wolff.
Aug 26 2024
48B
Private Equity
1 min
Judicial Intern
2012 – 2012
Analyst
2010 – 2011