Heidi Mayon is a Partner in Simpson Thacher’s Palo Alto office and a member of the Capital Markets Practice. She focuses on advising issuers and underwriters on a wide range of securities matters, including initial public offerings (IPOs), follow-on equity, block trades, bought deals, ATM programs, committed lines of equity, spin-offs and transactions by special purpose acquisition companies (SPACs). She has extensive experience across numerous industries including technology, healthcare and life sciences, fintech and payments, marketplaces and retail, energy and clean technology. Heidi also regularly advises public and private companies on reporting obligations, corporate governance and other general corporate matters.
Select experience prior to joining Simpson Thacher includes:
Initial Public Offerings (IPOs)
Issuers and underwriters in the initial public offerings for DoorDash, Poshmark, Doximity, Vera Therapeutics, ARMO Biosciences, Despegar, Renewable Energy Group, Arcus Biosciences, Cardlytics, Cloudera, Veracyte, SunPower, Violin Memory, Sonim Technologies, Skywater Technologies, Atheros Communications, Genomic Health and Financial Engines.
Other Complex Securities Transactions
Additional equity and debt offerings representing issuer and underwriters, including in transactions for Penumbra, Axon Enterprises, Natera, Cloudera, Theravance Biopharma, Coldwater Creek, Clearwater Paper, Renewable Energy Group and Evolus.
SPACs
Representation of companies in de-SPAC transactions, including Better Therapeutics, Cano Health and Open Lending. Representation of issuers and sponsors in SPAC IPOs, including Qell Acquisition Corp., Prime Impact and PTK.
Heidi was recognized as a 2021 “Dealmaker of the Year” by The American Lawyer. She has also received accolades from Silicon Valley Business Journal and Daily Journal.
Heidi received her J.D. from University of San Francisco School of Law in 2002 and her B.A. from University of San Diego in 1999.