
Stephen L. Mayo
Professor of Biology and Chemistry1
Stephen L. Mayo (born 1961) is a professor at the California Institute of Technology, where he is the William K. Bowes Jr. Leadership Chair in the Division of Biology and Biological Engineering, and the Bren Professor of Biology and Chemistry.2
From Wikipedia’s article on Stephen L. Mayo (this version), CC BY-SA 4.0.
Born 1961.1
About
His research focuses on structural biology and the development of computational methods for protein design. Mayo was elected to the United States National Academy of Sciences in 2004 and was appointed to a six-year term on the National Science Board in 2013.
From Wikipedia’s article on Stephen L. Mayo, shared under CC BY-SA 4.0.2
Companies
- Allogene Therapeutics, Inc.Board member Jul 12, 2022 to now14
- Sarepta TherapeuticsBoard member Nov 17, 2021 to now15
- Merck & Co.Board member Mar 15, 2021 to now16
Holdings
Stock this person has reported owning, from the forms officers and directors file with the SEC. See the biggest insider stakes.
Shares held
Sarepta Therapeutics SRPT18,640 shares17$330.2K at $17.71Jun 4, 2026- Allogene Therapeutics, Inc. ALLO25,328 shares18$32.5K at $1.28Aug 7, 2023
Merck & Co. MRK100 shares19$14.9K at $149.02Jun 2, 2026
As of each latest filing. The line shows shares held over time.
Recent filings
- Jun 4, 2026Granted 16,875 shares of Sarepta Therapeutics17
- Mar 12, 2026Sold 7,239 shares at $17.02 of Sarepta Therapeutics20
- Mar 10, 2025Granted 2,383 shares of Sarepta Therapeutics21
- Mar 5, 2024Sold 3,135 shares at $122.96 of Sarepta Therapeutics22
- Mar 1, 2024Granted 1,846 shares of Sarepta Therapeutics23
- Aug 7, 2023Sold 10,000 shares at $4.29 of Allogene Therapeutics, Inc.18
- Mar 6, 2023Granted 1,523 shares of Sarepta Therapeutics24
- Nov 17, 2022Sold 858 shares at $109.92 of Sarepta Therapeutics25
- Jul 8, 2022Granted 35,328 shares of Allogene Therapeutics, Inc.26
- Mar 7, 2022Granted 2,953 shares of Sarepta Therapeutics27
- Nov 16, 2021Granted 4,292 shares of Sarepta Therapeutics28
Early life and education
One of three sons, Mayo was born in 1961. His father had a career in the Air Force and his mother worked as a teacher's aide. Mayo attended Pennsylvania State University as an undergraduate and received a B.S. in chemistry in 1983. He received his Ph.D. from Caltech in 1987, after working on several projects primarily with Harry B. Gray and Bill Goddard. While a graduate student, Mayo co-founded a company, Molecular Simulations, Inc., which would later become Accelrys (now Biov
a). After a stint as a postdoctoral fellow at the University of California, Berkeley, Mayo spent two years working at MSI full-time before taking up another postdoc position at Stanford University.
Academic career
Mayo joined the Caltech faculty in 1992. In 1994 he was Awarded the Searle Scholar Award. A 1995 report identified him as the only black faculty member at Caltech, which had about 300 faculty at the time. He earned tenure in 1998, the first black faculty member to do so at Caltech.
In 2004, Mayo was elected to the United States National Academy of Sciences, at a relatively young and impressive age for that honor. He served as Vice Provost for Research from 2007 to 2010, when he became chair of the biology division. In 2012 he was named the inaugural William K. Bowes Jr. Leadership Chair. President Obama nominated Mayo in 2013 to a six-year term on the National Science Board, making Caltech the only institution with two board representatives. (The other is astronomer Anneila Sargent, appointed in 2011.)
From Wikipedia’s article on Stephen L. Mayo (this version), CC BY-SA 4.0.
Career
Occupation: biophysicist.8
- Since 2021Board member, Merck & Co.7
- Since 1992Worked at California Institute of Technology4 6
- Date not recordedWorked at California Institute of Technology4 5
Mayo co-founded the software company Molecular Simulations, Inc (MSI) while in graduate school, worked there full-time for two years, and continued consulting work thereafter. The company later became Accelrys (now Biovia). In 1997 Mayo and a former student co-founded Xencor, a biotechnology company based on protein design of antibodies. Mayo is also a co-founder and current scientific advisory board member of Protabit.
From Wikipedia’s article on Stephen L. Mayo (this version), CC BY-SA 4.0.
Personal life
- CitizenshipUnited States9
Mayo was once a nationally ranked hang glider pilot, and credits his interest in flying to his father's Air Force career. Mayo and his wife, a science writer, have two children and enjoy sailing as a hobby.
From Wikipedia’s article on Stephen L. Mayo (this version), CC BY-SA 4.0.
Awards
Links
Sources
The numbers on this page point here. Each one links to the record it came from.
- 1WikidataStephen L. Mayo on Wikidata
- 2WikipediaStephen L. Mayo on Wikipedia
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- 11Wikidataaward, as reported
- 12Wikidataaward, as reported
- 13Wikidataaward, as reported
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- 15SEC EDGARSarepta Therapeutics, Board member
- 16Wikidata and SEC EDGARMerck & Co., Board member
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- 20SEC EDGARForm 4 filed Mar 13, 2026
- 21SEC EDGARForm 4 filed Mar 11, 2025
- 22SEC EDGARForm 4 filed Mar 6, 2024
- 23SEC EDGARForm 4 filed Mar 5, 2024
- 24SEC EDGARForm 4 filed Mar 8, 2023
- 25SEC EDGARForm 4 filed Nov 21, 2022
- 26SEC EDGARForm 4 filed Jul 12, 2022
- 27SEC EDGARForm 4 filed Mar 9, 2022
- 28SEC EDGARForm 4 filed Nov 17, 2021
- 29Wikimedia CommonsStephen L. Mayo photo by Sandy Schaeffer Photography, Public domain