![Guy MacDonald](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>)
Guy MacDonald
Chairman at
SCYNEXIS, INC.
Net worth: 66 029 $ as of 2026-08-30
Profile
Guy MacDonald is currently Chairman at SCYNEXIS, Inc. since 2015.
Former roles include Chairman at F-Star Therapeutics, Inc. (United States) from 2014 to 2015, Director at Tetraphase Pharmaceuticals, Inc. in 2019, Vice President-Anti Infective & Hospital Products at Merck & Co., Inc. in 2003, and Executive Vice President-Operations at Idenix Pharmaceuticals LLC from 2003 to 2008.
Education includes an undergraduate degree from the University of Dundee.
Known holdings in public companies
| Company | Date | Number of shares | Valuation | Valuation date |
|---|---|---|---|---|
SCYNEXIS, INC. 0.13% | 2026-06-25 | 12,625 ( 0.13% ) | 66 029 $ | 2026-08-30 |
Guy MacDonald active positions
| Companies | Position | Start |
|---|---|---|
| SCYNEXIS, INC. | Chairman | 2015-06-03 |
Former positions of Guy MacDonald
| Companies | Position | End |
|---|---|---|
| TETRAPHASE PHARMACEUTICALS, INC. | Chief Executive Officer | 2019-07-31 |
| SPRING BANK PHARMACEUTICALS, INC. | Chairman | 2015-08-16 |
| IDENIX PHARMACEUTICALS INC | Chief Operating Officer | 2007-12-31 |
| MERCK & CO., INC. | Corporate Officer/Principal | 2002-12-31 |
Training of Guy MacDonald
Experiences
Positions held
Active
Inactive
Listed companies
Private companies
Connections
93
1st degree connections
6
1st degree companies
Male
Female
Members of the board
Executives
Linked companies
| Private companies | 6 |
|---|---|
Merck & Co., Inc.
 Merck & Co., Inc. Pharmaceuticals: MajorHealth Technology Manufactures human and animal health pharmaceutical products & vaccines | Health Technology |
Idenix Pharmaceuticals LLC
 Idenix Pharmaceuticals LLC Pharmaceuticals: MajorHealth Technology Operates as a biopharmaceutical company that develops drugs for the treatment of human viral and infectious diseases caused by hepatitis | Health Technology |
Tetraphase Pharmaceuticals, Inc.
 Tetraphase Pharmaceuticals, Inc. Pharmaceuticals: MajorHealth Technology Discovers and develops novel antibiotics | Health Technology |
SCYNEXIS, Inc.
 SCYNEXIS, Inc. Pharmaceuticals: MajorHealth Technology Develops novel oral and intravenous triterpenoid antifungal for the treatment of several serious fungal infections | Health Technology |
University Of Dundee
 University Of Dundee Other Consumer ServicesConsumer Services Functions as a College/University | Consumer Services |
F-Star Therapeutics, Inc. (United States)
 F-Star Therapeutics, Inc. (United States) Pharmaceuticals: MajorHealth Technology Engages in discovery, development and preparation of bioavailable therapeutics | Health Technology |
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