![Seth Harrison](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>)
Seth Harrison
Chairman at
BRAEBURN INC.
Net worth: 61 M $ as of 2026-06-29
Profile
Seth L.
Harrison is the founder of Apple Tree Venture Management Llc, founded in 1999, holding the title of Managing Partner.
Dr. Harrison was the founder of Tokai Pharmaceuticals, Inc., founded in 2004, holding the title of Director.
Dr. Harrison is also the founder of Marengo Therapeutics, Inc...
Dr. Harrison is Chief Executive Officer at Apple Tree Life Sciences, Inc. Dr. Harrison is Chairman at Braeburn, Inc., Limelight Bio, Inc., Aethon Therapeutics, Inc., Nereid Therapeutics, Inc., Braeburn Pharmaceuticals SPRL, and Adendra Therapeutics Ltd. Dr. Harrison is Director at Replicate Bioscience, Inc., Apertor Pharmaceuticals, Inc., Intergalactic Therapeutics, Inc., Nine Square Therapeutics, Inc., Gala Therapeutics, Inc., Marlinspike Therapeutics, Inc., Galvanize Therapeutics, Inc., Initial Therapeutics Inc, Harrison Atelier Foundation, Tortoise Foundation, Ascidian Therapeutics, Inc., Galaxy Medical, Inc. Dr. Harrison is Treasurer & Director at Syntimmune, Inc. Dr. Harrison is Independent Director at Stoke Therapeutics, Inc. Dr. Harrison is Board Member at Aulos Bioscience, Inc. Former positions include Deputy Chairman at HeartWare International LLC (2012–2016) and Heartware Pty Ltd. (2004–2008).
Vice Chairman at New York Studio School of Drawing Painting & Sculpture.
Director at Rein Therapeutics, Inc. (2013–2017), Eledon Pharmaceuticals, Inc., Corvidia Therapeutics, Inc., Tusker Medical, Inc., International Partnership for Microbicides (2002–2010), CleanSlate Centers, Inc., The Rockefeller Foundation, Cure Forward Corp., Avalo Therapeutics, Inc., Galavant Therapeutics, Inc., Akero Therapeutics, Inc. (Independent Director, 2019–2025), Sevin Rosen Bayless Management Co. (Venture Partner), and Oak Investment Partners (General Partner).
Education includes an MBA and doctorate from The Trustees of Columbia University in The City of New York, and undergraduate degree from Princeton University.
Known holdings in public companies
| Company | Date | Number of shares | Valuation | Valuation date |
|---|---|---|---|---|
| 2026-06-02 | 1,875,313 ( 3.17% ) | 61 M $ | 2026-06-29 |
Seth Harrison active positions
| Companies | Position | Start |
|---|---|---|
| BRAEBURN INC. | Chairman | - |
| STOKE THERAPEUTICS, INC. | Director/Board Member | - |
Apple Tree Venture Management Llc//vc
 Apple Tree Venture Management Llc//vc Investment ManagersFinance Apple Tree Partners invests in companies located in the United States. The firm focuses on the life sciences sector. It provides financing for seed, early and later stage capital requirements. | Founder | 1998-12-31 |
Harrison Atelier Foundation | Director/Board Member | - |
Gala Therapeutics, Inc.
 Gala Therapeutics, Inc. Medical SpecialtiesHealth Technology Develops medical devices for pulmonary diseases | Director/Board Member | - |
Galaxy Medical, Inc.
 Galaxy Medical, Inc. Miscellaneous Commercial ServicesCommercial Services Operates as a biotechnology company | Director/Board Member | - |
Galvanize Therapeutics, Inc.
 Galvanize Therapeutics, Inc. Medical SpecialtiesHealth Technology Delivers medical technology innovations that drive biologic processes to treat diseases, starting with treating chronic bronchitis symptoms, cardiac arrhythmias and solid tumors | Director/Board Member | - |
Tortoise Foundation | Director/Board Member | - |
Nine Square Therapeutics, Inc.
 Nine Square Therapeutics, Inc. BiotechnologyHealth Technology Provides biotechnology services | Director/Board Member | - |
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Former positions of Seth Harrison
| Companies | Position | End |
|---|---|---|
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| ░░░░░░░░ ░░░░░░░░░░░░░ ░░░░ | ░░░░░░░░░░░░░░ ░░░░░░ | - |
Training of Seth Harrison
Experiences
Positions held
Active
Inactive
Listed companies
Private companies
Connections
36
1st degree connections
43
1st degree companies
Male
Female
Members of the board
Executives
Linked companies
| Private companies | 43 |
|---|---|
Sevin Rosen Bayless Management Co.
 Sevin Rosen Bayless Management Co. Investment ManagersFinance Sevin Rosen Bayless invests in companies located in the United States. The firm targets companies operating in the fields of technology sector. It provides financing for early stage capital transactions. | Finance |
Heartware Pty Ltd.
 Heartware Pty Ltd. Medical SpecialtiesHealth Technology Develops & manufactures implantable circulatory assist devices | Health Technology |
International Partnership for Microbicides
 International Partnership for Microbicides BiotechnologyHealth Technology Develop human immunodeficiency virus prevention products | Health Technology |
Rein Therapeutics, Inc.
 Rein Therapeutics, Inc. Pharmaceuticals: MajorHealth Technology Develops stapled peptide drugs | Health Technology |
Syntimmune, Inc.
 Syntimmune, Inc. BiotechnologyHealth Technology Engages in developing novel antibody therapies and severe toxicities in bio pharma industry | Health Technology |
Cure Forward Corp.
 Cure Forward Corp. Miscellaneous Commercial ServicesCommercial Services Provides lab testing services | Commercial Services |
The Trustees of Columbia University in The City of New York
 The Trustees of Columbia University in The City of New York Other Consumer ServicesConsumer Services Functions as a College/University | Consumer Services |
Oak Investment Partners
 Oak Investment Partners Investment ManagersFinance Oak Investment Partners invests in companies located in the United States. The firm targets companies operating in the fields of information technology, internet & consumer, financial services, healthcare information & services and clean energy sectors. It participates in early stage capital requirements. | Finance |
Princeton University
 Princeton University Other Consumer ServicesConsumer Services Functions as a College/University | Consumer Services |
The Rockefeller Foundation
 The Rockefeller Foundation Investment Trusts/Mutual FundsMiscellaneous Operates and organizes charitable trusts | Miscellaneous |
Apple Tree Venture Management Llc//vc
Apple Tree Venture Management Llc//vc Investment ManagersFinance Apple Tree Partners invests in companies located in the United States. The firm focuses on the life sciences sector. It provides financing for seed, early and later stage capital requirements. | Finance |
Tokai Pharmaceuticals, Inc.
 Tokai Pharmaceuticals, Inc. Pharmaceuticals: MajorHealth Technology Develops novel proprietary therapies for the treatment of prostate cancer and other hormonally driven diseases | Health Technology |
HeartWare International LLC
 HeartWare International LLC Medical SpecialtiesHealth Technology Develops and manufactures implantable heart pumps | Health Technology |
New York Studio School of Drawing Painting & Sculpture
 New York Studio School of Drawing Painting & Sculpture Miscellaneous Commercial ServicesCommercial Services Operates arts school | Commercial Services |
Avalo Therapeutics, Inc.
 Avalo Therapeutics, Inc. Pharmaceuticals: MajorHealth Technology Develops and commercializes therapeutics for patients with unmet clinical need in immunology and rare genetic diseases | Health Technology |
Braeburn Pharmaceuticals SPRL
 Braeburn Pharmaceuticals SPRL Medical SpecialtiesHealth Technology Develops and commercializes medical products | Health Technology |
Apple Tree Life Sciences, Inc. | |
Braeburn, Inc.
 Braeburn, Inc. Miscellaneous Commercial ServicesCommercial Services Develops and manufactures pharmaceutical products for opioid use disorder | Commercial Services |
Gala Therapeutics, Inc.
Gala Therapeutics, Inc. Medical SpecialtiesHealth Technology Develops medical devices for pulmonary diseases | Health Technology |
Tusker Medical, Inc.
 Tusker Medical, Inc. Medical SpecialtiesHealth Technology Develops medical devices for ear, nose and throat treatments | Health Technology |
Corvidia Therapeutics, Inc.
 Corvidia Therapeutics, Inc. BiotechnologyHealth Technology Develops precision cardiovascular therapies | Health Technology |
CleanSlate Centers, Inc.
 CleanSlate Centers, Inc. Medical/Nursing ServicesHealth Services Operates addiction treatment center | Health Services |
Marengo Therapeutics, Inc.
 Marengo Therapeutics, Inc. BiotechnologyHealth Technology Operates as a biotechnology company that develops immunotherapies for cancer treatment | Health Technology |
Limelight Bio, Inc.
 Limelight Bio, Inc. BiotechnologyHealth Technology Develops genetic therapies | Health Technology |
Stoke Therapeutics, Inc.
 Stoke Therapeutics, Inc. BiotechnologyHealth Technology Operates as biotechnology company focused on the development of first-in-class therapeutics that selectively increase gene expression to treat genetic diseases | Health Technology |
Harrison Atelier Foundation | |
Tortoise Foundation | |
Eledon Pharmaceuticals, Inc.
 Eledon Pharmaceuticals, Inc. Pharmaceuticals: MajorHealth Technology Develops pharmaceuticals | Health Technology |
Akero Therapeutics, Inc.
 Akero Therapeutics, Inc. Pharmaceuticals: MajorHealth Technology Develops therapies for patients with metabolic diseases | Health Technology |
Galaxy Medical, Inc.
Galaxy Medical, Inc. Miscellaneous Commercial ServicesCommercial Services Operates as a biotechnology company | Commercial Services |
Galvanize Therapeutics, Inc.
Galvanize Therapeutics, Inc. Medical SpecialtiesHealth Technology Delivers medical technology innovations that drive biologic processes to treat diseases, starting with treating chronic bronchitis symptoms, cardiac arrhythmias and solid tumors | Health Technology |
Galavant Therapeutics, Inc.
 Galavant Therapeutics, Inc. BiotechnologyHealth Technology Develops novel therapeutics | Health Technology |
Nine Square Therapeutics, Inc.
Nine Square Therapeutics, Inc. BiotechnologyHealth Technology Provides biotechnology services | Health Technology |
Initial Therapeutics Inc
 Initial Therapeutics Inc BiotechnologyHealth Technology Develops biotechnology products | Health Technology |
Ascidian Therapeutics, Inc.
 Ascidian Therapeutics, Inc. Pharmaceuticals: MajorHealth Technology Operates as biopharmaceutical company | Health Technology |
Nereid Therapeutics, Inc.
 Nereid Therapeutics, Inc. BiotechnologyHealth Technology Operates as a bio-molecular condensate drug discovery and development company | Health Technology |
Apertor Pharmaceuticals, Inc.
 Apertor Pharmaceuticals, Inc. Pharmaceuticals: MajorHealth Technology Manufactures pharmaceutical products | Health Technology |
Aulos Bioscience, Inc.
 Aulos Bioscience, Inc. BiotechnologyHealth Technology Operates as a biotechnology firm | Health Technology |
Replicate Bioscience, Inc.
 Replicate Bioscience, Inc. Miscellaneous Commercial ServicesCommercial Services Engages in developing of replicate srRNA vectors deliver to cells in the body an instruction manual for making a therapeutic protein | Commercial Services |
Intergalactic Therapeutics, Inc.
 Intergalactic Therapeutics, Inc. BiotechnologyHealth Technology Develops novel non-viral gene therapies for patients | Health Technology |
Adendra Therapeutics Ltd.
 Adendra Therapeutics Ltd. BiotechnologyHealth Technology Develops immunotherapies for cancer and other illnesses | Health Technology |
Marlinspike Therapeutics, Inc.
 Marlinspike Therapeutics, Inc. BiotechnologyHealth Technology Operates as a biotechnology company | Health Technology |
Aethon Therapeutics, Inc.
 Aethon Therapeutics, Inc. Hospital/Nursing ManagementHealth Services Provides cancer treatment services | Health Services |
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