![Ronald Barrett](data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" width="16" height="16" fill="%231b1b1b" class="bi bi-person-fill" viewBox="0 0 16 16"><path d="M3 14s-1 0-1-1 1-4 6-4 6 3 6 4-1 1-1 1zm5-6a3 3 0 1 0 0-6 3 3 0 0 0 0 6"/></svg>)
Ronald Barrett
Chairman at
JANUX THERAPEUTICS, INC.
Net worth: 36 475 $ as of 2026-05-30
Profile
Ronald W.
Barrett was the founder of XenoPort, Inc., founded in 1999, where the title held was Chief Executive Officer & Director from 2001 to 2015.
Dr. Barrett is also the founder of Medikine, Inc...
Current jobs include Chairman at Janux Therapeutics, Inc. starting in 2024 and Director at Quadriga BioSciences, Inc. Former jobs include Independent Director at Concert Pharmaceuticals, Inc. from 2014 to 2022, Principal at Abbott Laboratories in 1989, and Senior Vice President-Research at Affymax Research Institute from 1989 to 1999.
Education includes undergraduate studies at Bucknell University and a doctorate from Rutgers State University of New Jersey.
Known holdings in public companies
| Company | Date | Number of shares | Valuation | Valuation date |
|---|---|---|---|---|
| 2026-06-10 | 2,500 ( 0% ) | 36 475 $ | 2026-05-30 |
Ronald Barrett active positions
| Companies | Position | Start |
|---|---|---|
| JANUX THERAPEUTICS, INC. | Chairman | 2024-07-18 |
Quadriga BioSciences, Inc.
 Quadriga BioSciences, Inc. Pharmaceuticals: MajorHealth Technology Manufactures pharmaceutical products | Director/Board Member | - |
Former positions of Ronald Barrett
| Companies | Position | End |
|---|---|---|
Medikine, Inc.
 Medikine, Inc. Pharmaceuticals: MajorHealth Technology Operates as preclinical-stage biopharmaceutical company | Chief Executive Officer | 2023-06-30 |
| CONCERT PHARMACEUTICALS, INC. | Director/Board Member | 2022-06-08 |
| XENOPORT, INC. | Chief Executive Officer | 2015-09-28 |
Affymax Research Institute
 Affymax Research Institute Miscellaneous Commercial ServicesCommercial Services Researches and develops pharmaceutical products | Chief Tech/Sci/R&D Officer | 1998-12-31 |
| ABBOTT LABORATORIES | Corporate Officer/Principal | 1988-12-31 |
Training of Ronald Barrett
Experiences
Positions held
Active
Inactive
Listed companies
Private companies
Connections
58
1st degree connections
9
1st degree companies
Male
Female
Members of the board
Executives
Linked companies
| Private companies | 9 |
|---|---|
Abbott Laboratories
 Abbott Laboratories Medical SpecialtiesHealth Technology Develops and manufactures medical devices, diagnostic systems, pharmaceuticals & nutritional products | Health Technology |
Concert Pharmaceuticals, Inc.
 Concert Pharmaceuticals, Inc. Pharmaceuticals: MajorHealth Technology Operates as a biopharmaceutical company that develops novel medicines | Health Technology |
Affymax Research Institute
Affymax Research Institute Miscellaneous Commercial ServicesCommercial Services Researches and develops pharmaceutical products | Commercial Services |
XenoPort, Inc.
 XenoPort, Inc. Pharmaceuticals: MajorHealth Technology Engages in developing and commercializing of pharmaceutical products for the potential treatment of neurological disorders | Health Technology |
Bucknell University
 Bucknell University Other Consumer ServicesConsumer Services Functions as a College/University | Consumer Services |
Rutgers State University of New Jersey
 Rutgers State University of New Jersey Other Consumer ServicesConsumer Services Functions as a College/University | Consumer Services |
Quadriga BioSciences, Inc.
Quadriga BioSciences, Inc. Pharmaceuticals: MajorHealth Technology Manufactures pharmaceutical products | Health Technology |
Janux Therapeutics, Inc.
 Janux Therapeutics, Inc. BiotechnologyHealth Technology Operates as a clinical-stage company that develops precision engineered immunotherapies | Health Technology |
Medikine, Inc.
Medikine, Inc. Pharmaceuticals: MajorHealth Technology Operates as preclinical-stage biopharmaceutical company | Health Technology |
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