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Stephen Mahoney
Chief Executive Officer at
VIRIDIAN THERAPEUTICS, INC.
Net worth: 587 609 $ as of 31/05/2026
Profile
Stephen Frank Mahoney was the founder of Kiniksa Pharmaceuticals Ltd., founded in 2015, where the title held was President & Chief Operating Officer from 2017 to 2019.
Current jobs include President, Chief Executive Officer & Director at Viridian Therapeutics, Inc. since 2023, and Director at Vesselon, Inc. Former jobs include Attorney at Mintz, Levin, Cohn, Ferris, Glovsky & Popeo PC; Chief Commercial Officer & Senior Vice President at Synageva BioPharma Corp.
from 2014 to 2015; COO, CFO, Treasurer & Chief Accounting Officer at Magenta Therapeutics, Inc. from 2020 to 2023; Chief Operating & Financial Officer at Dianthus Therapeutics, Inc. from 2020 to 2023; and Attorney at Genzyme Corp.
Education includes undergraduate studies at The Colorado College, graduate studies at Boston College Law School, and an MBA from Wallace E Carroll School of Management.
Known holdings in public companies
| Company | Date | Number of shares | Valuation | Valuation date |
|---|---|---|---|---|
| 31/03/2026 | 33,349 ( 0.03% ) | 587 609 $ | 31/05/2026 |
Stephen Mahoney active positions
| Companies | Position | Start |
|---|---|---|
| VIRIDIAN THERAPEUTICS, INC. | Chief Executive Officer | 30/10/2023 |
Vesselon, Inc.
 Vesselon, Inc. Medical SpecialtiesHealth Technology Develops a portable ultrasound device for brain stroke treatment | Director/Board Member | - |
Former positions of Stephen Mahoney
| Companies | Position | End |
|---|---|---|
| DIANTHUS THERAPEUTICS, INC. | Director of Finance/CFO | 01/09/2023 |
Kiniksa Pharmaceuticals Ltd.
 Kiniksa Pharmaceuticals Ltd. Pharmaceuticals: MajorHealth Technology Operates as a biopharmaceutical company that develops and delivers therapeutic medicines for patients suffering from cardiovascular diseases | Founder | 15/11/2019 |
| SYNAGEVA BIOPHARMA CORP | Corporate Officer/Principal | 01/01/2015 |
Genzyme Corp.
 Genzyme Corp. Pharmaceuticals: MajorHealth Technology Develops and manufactures therapies for rare diseases, multiple sclerosis, immunology & oncology | Corporate Officer/Principal | - |
| MAGENTA THERAPEUTICS | Director of Finance/CFO | - |
Training of Stephen Mahoney
Experiences
Positions held
Active
Inactive
Listed companies
Private companies
Connections
13
1st degree connections
11
1st degree companies
Male
Female
Members of the board
Executives
Linked companies
| Private companies | 11 |
|---|---|
Genzyme Corp.
Genzyme Corp. Pharmaceuticals: MajorHealth Technology Develops and manufactures therapies for rare diseases, multiple sclerosis, immunology & oncology | Health Technology |
Vesselon, Inc.
Vesselon, Inc. Medical SpecialtiesHealth Technology Develops a portable ultrasound device for brain stroke treatment | Health Technology |
Mintz, Levin, Cohn, Ferris, Glovsky & Popeo PC
 Mintz, Levin, Cohn, Ferris, Glovsky & Popeo PC Miscellaneous Commercial ServicesCommercial Services Provides legal services | Commercial Services |
The Colorado College
 The Colorado College Other Consumer ServicesConsumer Services Functions as a College/University | Consumer Services |
Synageva BioPharma Corp.
 Synageva BioPharma Corp. BiotechnologyHealth Technology Develops and manufactures biopharmaceutical products | Health Technology |
Boston College Law School
 Boston College Law School Other Consumer ServicesConsumer Services Functions as a College/University | Consumer Services |
Wallace E Carroll School of Management
 Wallace E Carroll School of Management Other Consumer ServicesConsumer Services Functions as a College/University | Consumer Services |
Kiniksa Pharmaceuticals Ltd.
Kiniksa Pharmaceuticals Ltd. Pharmaceuticals: MajorHealth Technology Operates as a biopharmaceutical company that develops and delivers therapeutic medicines for patients suffering from cardiovascular diseases | Health Technology |
Magenta Therapeutics, Inc.
 Magenta Therapeutics, Inc. Pharmaceuticals: MajorHealth Technology Develops and manufactures novel medicines | Health Technology |
Viridian Therapeutics, Inc.
 Viridian Therapeutics, Inc. Pharmaceuticals: MajorHealth Technology Operates as a biotechnology company that develops and manufactures monoclonal antibody products | Health Technology |
Dianthus Therapeutics, Inc.
 Dianthus Therapeutics, Inc. BiotechnologyHealth Technology Develops therapeutics for patients with autoimmune and inflammatory diseases | Health Technology |
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