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Jack Wyszomierski
Director/Board Member at
EXELIXIS, INC.
Net worth: 18 M $ as of 2026-09-29
Profile
Jack L.
Wyszomierski is currently an Independent Director at Exelixis, Inc. since 2004, a Director at SiteOne Landscape Supply LLC, a Director at Solenis LLC since 2014, and an Independent Director at SiteOne Landscape Supply, Inc. since 2016.
Former positions include Chairman at XOMA Royalty Corp.
from 2024 to 2026, Director at Unigene Laboratories, Inc. from 2012 to 2013, Director at AssuraMed, Inc. from 2011 to 2013, Director at AssuraMed Holding, Inc. from 2011 to 2013, Independent Director at Athersys, Inc. from 2010 to 2024, Director at Sparta I International Ltd., Chief Financial Officer & Executive Vice President at Schering-Plough Corp.
from 1996 to 2004, Chief Financial Officer & Executive Vice President at VWR International LLC from 2004 to 2009, Chief Financial Officer & Executive Vice President at VWR Funding, Inc. from 2004 to 2009, and Principal at Joy Manufacturing Co. Education includes undergraduate and graduate degrees from Carnegie Mellon University.
Known holdings in public companies
| Company | Date | Number of shares | Valuation | Valuation date |
|---|---|---|---|---|
EXELIXIS, INC. 0.11% | 2026-05-31 | 284,384 ( 0.11% ) | 17 M $ | 2026-09-29 |
| 2026-05-12 | 19,120 ( 0.04% ) | 2 M $ | 2026-09-29 |
Jack Wyszomierski active positions
| Companies | Position | Start |
|---|---|---|
| EXELIXIS, INC. | Director/Board Member | 2004-01-31 |
| SITEONE LANDSCAPE SUPPLY, INC. | Director/Board Member | 2016-03-31 |
SiteOne Landscape Supply LLC
 SiteOne Landscape Supply LLC Wholesale DistributorsDistribution Services Distributes landscape and irrigation products | Director/Board Member | - |
Solenis LLC
 Solenis LLC Chemicals: Major DiversifiedProcess Industries Produces water treatment chemistries, process aids, functional additives, cleaners and disinfectants | Director/Board Member | 2014-07-31 |
Former positions of Jack Wyszomierski
| Companies | Position | End |
|---|---|---|
| XOMA ROYALTY CORPORATION | Chairman | 2026-07-13 |
| ATHERSYS, INC. | Director/Board Member | 2024-03-31 |
| UNIGENE LABORATORIES INC | Director/Board Member | 2013-05-31 |
AssuraMed, Inc.
 AssuraMed, Inc. Medical DistributorsDistribution Services Markets and distributes healthcare products | Director/Board Member | 2013-02-28 |
AssuraMed Holding, Inc.
 AssuraMed Holding, Inc. Medical DistributorsDistribution Services Markets and distributes healthcare products | Director/Board Member | 2013-02-28 |
Education of Jack Wyszomierski
Experiences
Positions held
Active
Inactive
Listed companies
Private companies
Connections
71
1st degree connections
15
1st degree companies
Male
Female
Members of the board
Executives
Linked companies
| Private companies | 15 |
|---|---|
Schering-Plough Corp.
 Schering-Plough Corp. Pharmaceuticals: MajorHealth Technology Manufactures and sells pharmaceutical & health care products | Health Technology |
Unigene Laboratories, Inc.
 Unigene Laboratories, Inc. Pharmaceuticals: OtherHealth Technology Designs, delivers, manufactures and develops peptide-based therapeutics | Health Technology |
Carnegie Mellon University
 Carnegie Mellon University Other Consumer ServicesConsumer Services Functions as a College/University | Consumer Services |
XOMA Royalty Corp.
 XOMA Royalty Corp. Pharmaceuticals: MajorHealth Technology Discovers and develops antibody therapeutics | Health Technology |
Exelixis, Inc.
 Exelixis, Inc. Pharmaceuticals: MajorHealth Technology Operates as a cancer drug discovery company | Health Technology |
AssuraMed, Inc.
AssuraMed, Inc. Medical DistributorsDistribution Services Markets and distributes healthcare products | Distribution Services |
VWR International LLC
 VWR International LLC Specialty StoresRetail Trade Retails laboratory equipment through online | Retail Trade |
SiteOne Landscape Supply LLC
SiteOne Landscape Supply LLC Wholesale DistributorsDistribution Services Distributes landscape and irrigation products | Distribution Services |
VWR Funding, Inc.
 VWR Funding, Inc. Wholesale DistributorsDistribution Services Distributes scientific and engineering equipment & supplies | Distribution Services |
Athersys, Inc.
 Athersys, Inc. BiotechnologyHealth Technology Operates as biotechnology company that develops novel and proprietary therapies | Health Technology |
Joy Manufacturing Co.
 Joy Manufacturing Co. Trucks/Construction/Farm MachineryProducer Manufacturing Manufactures mining and materials handling machinery | Producer Manufacturing |
AssuraMed Holding, Inc.
AssuraMed Holding, Inc. Medical DistributorsDistribution Services Markets and distributes healthcare products | Distribution Services |
Solenis LLC
Solenis LLC Chemicals: Major DiversifiedProcess Industries Produces water treatment chemistries, process aids, functional additives, cleaners and disinfectants | Process Industries |
SiteOne Landscape Supply, Inc.
 SiteOne Landscape Supply, Inc. Wholesale DistributorsDistribution Services Distributes landscaping and agronomic products & equipment | Distribution Services |
Solenis Uk International Ltd.
 Solenis Uk International Ltd. Financial ConglomeratesFinance Functions as an investment holding company | Finance |
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