![David McWilliams](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>)
David McWilliams
Chairman at
GREENWICH LIFESCIENCES, INC.
Net worth: 11 M $ as of 30/10/2026
Profile
David B. McWilliams is currently Chairman at BioHouston, Inc. and Greenwich LifeSciences, Inc. (since 2016), Director at Texas Healthcare & Bioscience Institute and Norwell Mfg.
Co., Inc., and Member of The Phi Beta Kappa Society.
Former roles include President, Chief Executive Officer & Director at Encysive Pharmaceuticals, Inc. (1992–2002); Chief Executive Officer & Director at Signase, Inc.; President & Chief Executive Officer at Bacterial Barcodes, Inc. (2003); President & Chief Executive Officer at Opexa Therapeutics, Inc. (2006–2008); President & Chief Executive Officer at Kallestad Diagnostics, Inc.; Director at Repros Therapeutics, Inc.; Director at Novelos Therapeutics, Inc. (2005–2011); Director at Technology & Entrepreneurship Center of Houston; Director at ApoCell, Inc.; General Manager at Abbott Laboratories; Management Consultant at McKinsey & Co., Inc.; and President-Harleco Diagnostics Division at EM Industries LLC.
Education includes an MBA from The University of Chicago and undergraduate studies at Washington & Jefferson College.
Known holdings in public companies
| Company | Date | Number of shares | Valuation | Valuation date |
|---|---|---|---|---|
| 25/10/2026 | 620,327 ( 4.23% ) | 11 M $ | 30/10/2026 |
David McWilliams active positions
| Companies | Position | Start |
|---|---|---|
| GREENWICH LIFESCIENCES, INC. | Chairman | 31/01/2009 |
BioHouston, Inc.
 BioHouston, Inc. Miscellaneous Commercial ServicesCommercial Services Engages in life science and biotechnology commercialization | Chairman | - |
Texas Healthcare & Bioscience Institute
 Texas Healthcare & Bioscience Institute Miscellaneous Commercial ServicesCommercial Services Operates as an membership association of public policy voice for the healthcare and bioscience industry | Director/Board Member | - |
Norwell Mfg. Co., Inc.
 Norwell Mfg. Co., Inc. Electrical ProductsProducer Manufacturing Manufactures and sells interior and exterior lighting products | Director/Board Member | - |
The Phi Beta Kappa Society
 The Phi Beta Kappa Society Miscellaneous Commercial ServicesCommercial Services Operates as a organisation for liberal arts and science education | Corporate Officer/Principal | - |
Former positions of David McWilliams
| Companies | Position | End |
|---|---|---|
Novelos Therapeutics, Inc.
 Novelos Therapeutics, Inc. Pharmaceuticals: MajorHealth Technology Develops and provides pharmaceutical drugs | Director/Board Member | 07/04/2011 |
Opexa Therapeutics, Inc.
 Opexa Therapeutics, Inc. Pharmaceuticals: MajorHealth Technology Develops autologous personalized cell therapies for the treatment of various diseases. | Chief Executive Officer | 31/05/2008 |
Bacterial Barcodes, Inc.
 Bacterial Barcodes, Inc. Medical SpecialtiesHealth Technology Develops advanced molecular biology technology | Chief Executive Officer | 30/11/2003 |
Encysive Pharmaceuticals, Inc.
 Encysive Pharmaceuticals, Inc. Pharmaceuticals: MajorHealth Technology Discovers, develops and markets drugs for the treatment of cardiovascular, vascular and related inflammatory diseases | Chief Executive Officer | 24/03/2002 |
| ░░ ░░░░░░░░░░ ░░░ | ░░░░░░░░░ ░░░░░░░░░░░░░░░░░ | - |
Education of David McWilliams
Experiences
Positions held
Active
Inactive
Listed companies
Private companies
Connections
68
1st degree connections
19
1st degree companies
Male
Female
Members of the board
Executives
Linked companies
| Private companies | 19 |
|---|---|
Abbott Laboratories
 Abbott Laboratories Medical SpecialtiesHealth Technology Develops and manufactures medical devices, diagnostic systems, pharmaceuticals & nutritional products | Health Technology |
Encysive Pharmaceuticals, Inc.
Encysive Pharmaceuticals, Inc. Pharmaceuticals: MajorHealth Technology Discovers, develops and markets drugs for the treatment of cardiovascular, vascular and related inflammatory diseases | Health Technology |
Repros Therapeutics, Inc.
 Repros Therapeutics, Inc. Pharmaceuticals: MajorHealth Technology Operates as a biopharmaceutical company that develops drugs to treat hormonal and reproductive system disorders | Health Technology |
Signase, Inc.
 Signase, Inc. BiotechnologyHealth Technology Develops novel and small-molecule inhibitors of a critical cell replication pathway to inhibit tumor growth | Health Technology |
McKinsey & Co., Inc.
 McKinsey & Co., Inc. Miscellaneous Commercial ServicesCommercial Services Operates as a management consulting firm | Commercial Services |
Bacterial Barcodes, Inc.
Bacterial Barcodes, Inc. Medical SpecialtiesHealth Technology Develops advanced molecular biology technology | Health Technology |
The University of Chicago
 The University of Chicago Other Consumer ServicesConsumer Services Functions as a College/University | Consumer Services |
Washington & Jefferson College
 Washington & Jefferson College Other Consumer ServicesConsumer Services Functions as a College/University | Consumer Services |
Novelos Therapeutics, Inc.
Novelos Therapeutics, Inc. Pharmaceuticals: MajorHealth Technology Develops and provides pharmaceutical drugs | Health Technology |
Opexa Therapeutics, Inc.
Opexa Therapeutics, Inc. Pharmaceuticals: MajorHealth Technology Develops autologous personalized cell therapies for the treatment of various diseases. | Health Technology |
BioHouston, Inc.
BioHouston, Inc. Miscellaneous Commercial ServicesCommercial Services Engages in life science and biotechnology commercialization | Commercial Services |
Technology & Entrepreneurship Center of Houston
 Technology & Entrepreneurship Center of Houston Investment ManagersFinance Provides investment advisory and consulting services to entrepreneurs | Finance |
Texas Healthcare & Bioscience Institute
Texas Healthcare & Bioscience Institute Miscellaneous Commercial ServicesCommercial Services Operates as an membership association of public policy voice for the healthcare and bioscience industry | Commercial Services |
The Phi Beta Kappa Society
The Phi Beta Kappa Society Miscellaneous Commercial ServicesCommercial Services Operates as a organisation for liberal arts and science education | Commercial Services |
ApoCell, Inc.
 ApoCell, Inc. Medical/Nursing ServicesHealth Services Engages in molecular biomarker detection | Health Services |
Norwell Mfg. Co., Inc.
Norwell Mfg. Co., Inc. Electrical ProductsProducer Manufacturing Manufactures and sells interior and exterior lighting products | Producer Manufacturing |
Kallestad Diagnostics, Inc. | |
Greenwich LifeSciences, Inc.
 Greenwich LifeSciences, Inc. BiotechnologyHealth Technology Operates as a clinical-stage biopharmaceutical company that develops immunotherapy to prevent breast cancer recurrences | Health Technology |
EM Industries LLC |
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