LAWYER PROFILE
Heidi Mayon

Heidi Mayon

USA 2026

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Ranked in 2 practice areas

About

Provided by Simpson Thacher & Bartlett LLP

Practice Areas

Heidi Mayon's practice focuses on all areas of corporate and securities law, with an emphasis on capital markets transactions. Ms. Mayon represents a full range of corporate clients on a wide variety of matters, including public company readiness, initial public offerings, complex capital markets transactions, corporate governance and advising boards of directors. She works with clients across a broad range of industries, including artificial intelligence, e-commerce, consumer goods, biotechnology, software, retail, telecommunications, hardware, and energy and clean technology. Heidi has been named “Dealmaker of the Year” by the American Lawyer, to Lawdragon’s “500 Leading Dealmakers in America,” to the Daily Journal’s “Top Women Lawyers” and “Top California Lawyers” and a “Silicon Valley Women of Influence” by the Silicon Valley Business Journal.

Heidi has represented issuers and underwriters in well over 150 offerings of equity and debt including the IPOs for DoorDash, Poshmark, Doximity, Astera Labs, Vera Therapeutics, ARMO Biosciences, Anaplan, Despegar, Renewable Energy Group, Arcus Biosciences, Cardlytics, Cloudera, Veracyte, SunPower, Violin Memory, Sonim Technologies, Skywater Technologies, Atheros Communications, Genomic Health and Financial Engines.

Chambers Review

Provided by Chambers

Chambers Guide to the USA

Capital Markets: Debt & Equity - California

Band 3
Band 3

Individual Editorial

Heidi Mayon boasts notable experience in handling significant IPOs. Her clients stem from a broad range of industries including the technology and energy sectors.

Capital Markets: Debt & Equity: Western United States - USA - Nationwide

Band 3
Band 3

Individual Editorial

Heidi Mayon boasts notable experience in handling significant IPOs. Her clients stem from a broad range of industries including the technology and energy sectors.

Strengths

Provided by Chambers

  • Heidi is always accessible and provides expert opinions.

    Capital Markets: Debt & EquityChambers Guide to the USA
  • Heidi is always accessible and provides expert opinions.

    Capital Markets: Debt & Equity: Western United StatesChambers Guide to the USA

Ranked Individuals at Simpson Thacher & Bartlett LLP (156)

California

California: Los Angeles & Surrounds

California: San Francisco, Silicon Valley & Surrou

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    Tristan Brown

    Employee Benefits & Executive Compensation

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District of Columbia

Illinois

Massachusetts

New York

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