![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: 12 130 $ as of 2026-05-30
Profile
Mr. Guy MacDonald is a Chairman at SCYNEXIS, Inc. Mr. MacDonald was previously employed as an Executive Vice President-Operations by Idenix Pharmaceuticals LLC, a Vice President-Anti Infective & Hospital Products by Merck & Co., Inc., and a Chairman by Spring Bank Pharmaceuticals, Inc. He also served on the board at Tetraphase Pharmaceuticals, Inc. He received his undergraduate degree from the University Of Dundee.
Known holdings in public companies
| Company | Date | Number of shares | Valuation | Valuation date |
|---|---|---|---|---|
SCYNEXIS, INC. 0.02% | 2026-03-31 | 17,206 ( 0.02% ) | 12 130 $ | 2026-05-30 |
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
83
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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