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Thomas Kassberg
Director/Board Member at
PASSAGE BIO, INC.
Net worth: 6 M $ as of 30/05/2026
Profile
Thomas Richard Kassberg was the founder of Plexxikon, Inc., founded in 2000, where the title held was Vice President-Business & Corporate Development from 2000 to 2004.
The current job is Director at Passage Bio, Inc. starting in 2024.
Former jobs include Senior Director-Corporate Licensing at Pharmacia, Inc., Principal at Bristol Myers Squibb Co., SVP-Business Development & Corporate Licensing at Sugen, Inc. from 1995 to 1999, SVP-Corporate Development & Commercial Operations at InterMune, Inc. from 2004 to 2007, Chief Business Officer at Melinta Subsidiary Corp., Vice President-Business Development at Corium LLC (Massachusetts) from 2010 to 2011, Chief Business Officer & Executive Vice President at Ultragenyx Pharmaceutical, Inc. from 2016 to 2025, President at Dimension Therapeutics, Inc., and Senior Vice President-Corporate Development at Proteolix, Inc. from 2008 to 2009.
Education includes an undergraduate degree from Gustavus Adolphus College conferred in 1982 and an MBA from Kellogg School of Management.
Known holdings in public companies
| Company | Date | Number of shares | Valuation | Valuation date |
|---|---|---|---|---|
| 02/03/2025 | 264,730 ( 0.27% ) | 6 M $ | 30/05/2026 | |
PASSAGE BIO, INC. -.--% | 18/05/2026 | 0 ( -.--% ) | - $ | 30/05/2026 |
Thomas Kassberg active positions
| Companies | Position | Start |
|---|---|---|
| PASSAGE BIO, INC. | Director/Board Member | 09/09/2024 |
Former positions of Thomas Kassberg
| Companies | Position | End |
|---|---|---|
| ULTRAGENYX PHARMACEUTICAL INC. | Corporate Officer/Principal | 21/09/2025 |
| CORIUM INTERNATIONAL INC | Corporate Officer/Principal | 30/09/2011 |
Proteolix, Inc.
 Proteolix, Inc. Pharmaceuticals: MajorHealth Technology Manufactures bio-pharmaceutical related products | Corporate Officer/Principal | 31/01/2009 |
| INTERMUNE INC | Corporate Officer/Principal | 02/07/2007 |
Plexxikon, Inc.
 Plexxikon, Inc. Miscellaneous Commercial ServicesCommercial Services Provides clinical and medical drug discovery and development services | Founder | 30/06/2004 |
Training of Thomas Kassberg
Experiences
Positions held
Active
Inactive
Listed companies
Private companies
Connections
71
1st degree connections
13
1st degree companies
Male
Female
Members of the board
Executives
Linked companies
| Private companies | 13 |
|---|---|
Bristol Myers Squibb Co.
 Bristol Myers Squibb Co. Pharmaceuticals: MajorHealth Technology Manufactures and markets biopharmaceuticals products | Health Technology |
Sugen, Inc.
 Sugen, Inc. Pharmaceuticals: MajorHealth Technology Develops small molecule drugs and related pharmaceutical products | Health Technology |
InterMune, Inc.
 InterMune, Inc. BiotechnologyHealth Technology Operates as a biotechnology company that researches and develops therapies in pulmonology & orphan fibrotic diseases | Health Technology |
Plexxikon, Inc.
Plexxikon, Inc. Miscellaneous Commercial ServicesCommercial Services Provides clinical and medical drug discovery and development services | Commercial Services |
Ultragenyx Pharmaceutical, Inc.
 Ultragenyx Pharmaceutical, Inc. Pharmaceuticals: MajorHealth Technology Develops and commercializes novel products for the treatment of serious rare and ultra-rare genetic diseases | Health Technology |
Gustavus Adolphus College
 Gustavus Adolphus College Other Consumer ServicesConsumer Services Functions as a College/University | Consumer Services |
Melinta Subsidiary Corp.
 Melinta Subsidiary Corp. Pharmaceuticals: MajorHealth Technology Develops and markets pharmaceutical products for the treatment of life-threatening infections | Health Technology |
Proteolix, Inc.
Proteolix, Inc. Pharmaceuticals: MajorHealth Technology Manufactures bio-pharmaceutical related products | Health Technology |
Corium International, Inc.
 Corium International, Inc. Pharmaceuticals: MajorHealth Technology Engages in the development and commercialization of novel neuroscience therapies | Health Technology |
Pharmacia, Inc. | |
Dimension Therapeutics, Inc.
 Dimension Therapeutics, Inc. BiotechnologyHealth Technology Develops novel treatments for rare diseases | Health Technology |
Kellogg School of Management
 Kellogg School of Management Other Consumer ServicesConsumer Services Functions as a College/University | Consumer Services |
Passage Bio, Inc.
 Passage Bio, Inc. BiotechnologyHealth Technology Develops therapies for the treatment of monogenic central nervous system disorders | Health Technology |
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