![Sean McCarthy](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>)
Sean McCarthy
Chief Executive Officer at
CYTOMX THERAPEUTICS, INC.
Net worth: 3 M $ as of 2026-06-29
Profile
Sean A. McCarthy is Chairman & Chief Executive Officer at CytomX Therapeutics Holdings LLC since 2019 and has been with the company since 2010.
He is Chairman, President & Chief Executive Officer at CytomX Therapeutics, Inc. since 2010.
He serves as Director at California Biomedical Innovation Alliance and California Life Sciences Association, and as Independent Director at OncoResponse, Inc. Former roles include Associate Director-Program Management at Millennium Pharmaceuticals, Inc., Director at TYRX, Inc., Vice President-Business Development at SGX Pharmaceuticals, Inc. from 2000 to 2011, and Transactional Partner at Pappas Capital LLC.
Education includes undergraduate studies at King's College London, a doctorate from St. John's College, and an MBA from Rady School of Management at UC San Diego.
Known holdings in public companies
| Company | Date | Number of shares | Valuation | Valuation date |
|---|---|---|---|---|
| 2026-04-19 | 816,373 ( 0.5% ) | 3 M $ | 2026-06-29 |
Sean McCarthy active positions
| Companies | Position | Start |
|---|---|---|
| CYTOMX THERAPEUTICS, INC. | Chief Executive Officer | 2011-07-31 |
CytomX Therapeutics Holdings LLC
 CytomX Therapeutics Holdings LLC Pharmaceuticals: MajorHealth Technology Engaged in the development of new generation targeted antibody therapeutics | Chief Executive Officer | 2010-12-31 |
California Biomedical Innovation Alliance
 California Biomedical Innovation Alliance BiotechnologyHealth Technology Provides biomedical advocacy and community services | Director/Board Member | - |
California Life Sciences Association
 California Life Sciences Association Miscellaneous Commercial ServicesCommercial Services Acts as a trade association which represents the life sciences industry of California | Director/Board Member | - |
OncoResponse, Inc.
 OncoResponse, Inc. BiotechnologyHealth Technology Discovers cancer immunotherapies by interrogating the human immune system | Director/Board Member | - |
Former positions of Sean McCarthy
| Companies | Position | End |
|---|---|---|
SGX Pharmaceuticals, Inc.
 SGX Pharmaceuticals, Inc. Pharmaceuticals: MajorHealth Technology Researches and develops drugs and other pharmaceutical products | Corporate Officer/Principal | 2011-04-17 |
Pappas Capital LLC
 Pappas Capital LLC Investment ManagersFinance Pappas Ventures invests in companies located in the across the globe and primarily in United States, Canada and Asia. The firm focuses on next-generation life science, agriculture, and technology. It participates in seed and early-stage transactions. | Corporate Officer/Principal | - |
TYRX, Inc.
 TYRX, Inc. Electronic Equipment/InstrumentsElectronic Technology Designs and manufactures medical-pharmaceutical combination devices | Director/Board Member | - |
Millennium Pharmaceuticals, Inc.
 Millennium Pharmaceuticals, Inc. Pharmaceuticals: MajorHealth Technology Manufactures medicines for oncology treatment | Corporate Officer/Principal | - |
Training of Sean McCarthy
Experiences
Positions held
Active
Inactive
Listed companies
Private companies
Connections
62
1st degree connections
12
1st degree companies
Male
Female
Members of the board
Executives
Linked companies
| Private companies | 12 |
|---|---|
Millennium Pharmaceuticals, Inc.
Millennium Pharmaceuticals, Inc. Pharmaceuticals: MajorHealth Technology Manufactures medicines for oncology treatment | Health Technology |
TYRX, Inc.
TYRX, Inc. Electronic Equipment/InstrumentsElectronic Technology Designs and manufactures medical-pharmaceutical combination devices | Electronic Technology |
SGX Pharmaceuticals, Inc.
SGX Pharmaceuticals, Inc. Pharmaceuticals: MajorHealth Technology Researches and develops drugs and other pharmaceutical products | Health Technology |
Pappas Capital LLC
Pappas Capital LLC Investment ManagersFinance Pappas Ventures invests in companies located in the across the globe and primarily in United States, Canada and Asia. The firm focuses on next-generation life science, agriculture, and technology. It participates in seed and early-stage transactions. | Finance |
King's College London
 King's College London Other Consumer ServicesConsumer Services Functions as a College/University | Consumer Services |
CytomX Therapeutics Holdings LLC
CytomX Therapeutics Holdings LLC Pharmaceuticals: MajorHealth Technology Engaged in the development of new generation targeted antibody therapeutics | Health Technology |
St. John's College
 St. John's College Other Consumer ServicesConsumer Services Functions as a College/University | Consumer Services |
Rady School of Management at UC San Diego
 Rady School of Management at UC San Diego Other Consumer ServicesConsumer Services Functions as a College/University | Consumer Services |
CytomX Therapeutics, Inc.
 CytomX Therapeutics, Inc. Pharmaceuticals: MajorHealth Technology Operates as an oncology-base biopharmaceutical company, which focuses on developing probody therapeutics for the treatment of cancer | Health Technology |
California Biomedical Innovation Alliance
California Biomedical Innovation Alliance BiotechnologyHealth Technology Provides biomedical advocacy and community services | Health Technology |
OncoResponse, Inc.
OncoResponse, Inc. BiotechnologyHealth Technology Discovers cancer immunotherapies by interrogating the human immune system | Health Technology |
California Life Sciences Association
California Life Sciences Association Miscellaneous Commercial ServicesCommercial Services Acts as a trade association which represents the life sciences industry of California | Commercial Services |
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