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Jim Kastenmayer
General Counsel at
ARRIVENT BIOPHARMA, INC.
Net worth: 223 574 $ as of 2026-05-30
Profile
Dr. Jim Kastenmayer is a Secretary & General Counsel at Arrivent BioPharma, Inc. Dr. Kastenmayer was previously employed as a Secretary & General Counsel by Aeglea Biotherapeutics, Inc., a Secretary, General Counsel & Senior Vice President by Viela Bio, Inc., a Legal Director & Senior Patent Director by AstraZeneca PLC, and an IP Counsel by MedImmune LLC.
He received his undergraduate degree from the University of Virginia, a graduate degree from Georgetown University Law Center and a doctorate degree from Michigan State University.
Known holdings in public companies
| Company | Date | Number of shares | Valuation | Valuation date |
|---|---|---|---|---|
| 2026-02-01 | 7,386 ( 0.02% ) | 223 574 $ | 2026-05-30 |
Jim Kastenmayer active positions
| Companies | Position | Start |
|---|---|---|
| ARRIVENT BIOPHARMA, INC. | General Counsel | 2023-08-31 |
Former positions of Jim Kastenmayer
| Companies | Position | End |
|---|---|---|
| SPYRE THERAPEUTICS, INC. | Chief Executive Officer | 2022-11-28 |
| VIELA BIO, INC. | General Counsel | 2021-02-28 |
| ASTRAZENECA PLC | General Counsel | 2019-11-30 |
MedImmune LLC
 MedImmune LLC Pharmaceuticals: MajorHealth Technology Operates as a biopharmaceutical company | Corporate Officer/Principal | - |
Training of Jim Kastenmayer
Experiences
Positions held
Active
Inactive
Listed companies
Private companies
Connections
52
1st degree connections
8
1st degree companies
Male
Female
Members of the board
Executives
Linked companies
| Private companies | 8 |
|---|---|
MedImmune LLC
MedImmune LLC Pharmaceuticals: MajorHealth Technology Operates as a biopharmaceutical company | Health Technology |
AstraZeneca PLC
 AstraZeneca PLC Pharmaceuticals: MajorHealth Technology Manufactures pharmaceutical products | Health Technology |
Spyre Therapeutics, Inc.
 Spyre Therapeutics, Inc. Pharmaceuticals: MajorHealth Technology Operates as a clinical-stage biotechnology company | Health Technology |
Michigan State University
 Michigan State University Other Consumer ServicesConsumer Services Functions as a College/University | Consumer Services |
University of Virginia
 University of Virginia Other Consumer ServicesConsumer Services Functions as a College/University | Consumer Services |
Georgetown University Law Center
 Georgetown University Law Center Other Consumer ServicesConsumer Services Functions as a College/University | Consumer Services |
Viela Bio, Inc.
 Viela Bio, Inc. Pharmaceuticals: MajorHealth Technology Operates as clinical-stage biotechnology company that develops treatments for inflammation and autoimmune diseases | Health Technology |
Arrivent BioPharma, Inc.
 Arrivent BioPharma, Inc. Pharmaceuticals: OtherHealth Technology Engages in development and commercialization of cancer medicines | Health Technology |
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