![John Flavin](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>)
John Flavin
Founder at
PYXIS ONCOLOGY, INC.
Net worth: 1 M $ as of 30/08/2026
Profile
Mr. John L.
Flavin is an Executive Chairman at ClostraBio, Inc., a Founder & Chief Executive Officer at Portal Innovations LLC, a Lead Independent Director at Pyxis Oncology, Inc. and a Managing Director at Flavin Ventures LLC.
He is on the Board of Directors at Pyxis Oncology, Inc. and Grove Biopharma, Inc. Mr. Flavin was previously employed as a Chief Financial Officer by Endotronix, Inc., a Principal by The University of Chicago, a Co-Founder by MATTER Chicago, a President, CFO, Secretary & Director by Advanced Life Sciences Holdings, Inc., a Chief Operating Officer by MediChem Life Sciences, Inc., a Chief Executive Officer by Advanced X-Ray Analytical Services, Inc., a Chief Executive Officer by Emerald BioStructures, Inc., and a Chief Executive Officer by ThermoGen, Inc. He received his undergraduate degree from Marquette University and an MBA from Lewis University.
Known holdings in public companies
| Company | Date | Number of shares | Valuation | Valuation date |
|---|---|---|---|---|
| 19/04/2026 | 413,015 ( 0.5% ) | 1 M $ | 30/08/2026 |
John Flavin active positions
| Companies | Position | Start |
|---|---|---|
| PYXIS ONCOLOGY, INC. | Founder | 30/04/2018 |
Flavin Ventures LLC
 Flavin Ventures LLC Engineering & ConstructionIndustrial Services Flavin Ventures LLC is a life sciences venture creation and management firm specializing in guiding life science companies from proprietary research through development to commercial success. The private company is based in Woodridge, IL and has subsidiaries in the United States. The company leverages expertise in drug discovery, development, and commercialization, demonstrated through its portfolio companies such as Shamrock Structures, Advanced Life Sciences (ADLS), and Medichem Life Sciences (MCLS). Flavin Ventures secures funding, negotiates strategic development and commercialization agreements, and manages regulatory submissions, including FDA new drug applications. The firm maintains relationships with venture capital groups to facilitate co-investment and follow-on funding. Its management team has experience in R&D, product development, alliances, capital raising, legal and governmental affairs, and company management. | Corporate Officer/Principal | 30/04/2002 |
Portal Innovations LLC
 Portal Innovations LLC Investment ManagersFinance Portal Innovations invests in companies located in the United States. The firm targets companies operating in the fields of life sciences, medtech and bioinformatics. It provides financing for seed and early stage capital requirements. | Chief Executive Officer | 29/02/2020 |
ClostraBio, Inc.
 ClostraBio, Inc. Pharmaceuticals: MajorHealth Technology Develops microbiome-modulating therapeutics | Chairman | 29/02/2020 |
Grove Biopharma, Inc.
 Grove Biopharma, Inc. Pharmaceuticals: MajorHealth Technology Manufactures pharmaceuticals | Director/Board Member | - |
Former positions of John Flavin
| Companies | Position | End |
|---|---|---|
Endotronix, Inc.
 Endotronix, Inc. Medical SpecialtiesHealth Technology Develops implantable pulmonary artery pressure sensor for heart | Director of Finance/CFO | 31/01/2020 |
The University of Chicago
 The University of Chicago Other Consumer ServicesConsumer Services Functions as a College/University | Corporate Officer/Principal | 31/03/2018 |
Innovation Development Institute, Inc.
 Innovation Development Institute, Inc. Electronic Equipment/InstrumentsElectronic Technology Develops medical devices | Founder | 31/08/2013 |
| ADVANCED LIFE SCIENCES HOLDINGS, INC. | President | 04/05/2011 |
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Training of John Flavin
Experiences
Positions held
Active
Inactive
Listed companies
Private companies
Connections
82
1st degree connections
15
1st degree companies
Male
Female
Members of the board
Executives
Linked companies
| Private companies | 15 |
|---|---|
MediChem Life Sciences, Inc.
 MediChem Life Sciences, Inc. Miscellaneous Commercial ServicesCommercial Services Provides research and drug discovery services | Commercial Services |
Advanced Life Sciences Holdings, Inc.
 Advanced Life Sciences Holdings, Inc. BiotechnologyHealth Technology Discovers, develops and distributes novel drugs for infectious diseases | Health Technology |
Endotronix, Inc.
Endotronix, Inc. Medical SpecialtiesHealth Technology Develops implantable pulmonary artery pressure sensor for heart | Health Technology |
Emerald BioStructures, Inc.
 Emerald BioStructures, Inc. Miscellaneous Commercial ServicesCommercial Services Offers products and services in protein X-ray crystallography, specializing in the area of protein crystallization | Commercial Services |
ThermoGen, Inc.
 ThermoGen, Inc. Medical SpecialtiesHealth Technology Develops biocatalysts for pharmaceutical production | Health Technology |
The University of Chicago
The University of Chicago Other Consumer ServicesConsumer Services Functions as a College/University | Consumer Services |
Lewis University
 Lewis University Other Consumer ServicesConsumer Services Functions as a College/University | Consumer Services |
Marquette University
 Marquette University Other Consumer ServicesConsumer Services Functions as a College/University | Consumer Services |
Flavin Ventures LLC
Flavin Ventures LLC Engineering & ConstructionIndustrial Services Flavin Ventures LLC is a life sciences venture creation and management firm specializing in guiding life science companies from proprietary research through development to commercial success. The private company is based in Woodridge, IL and has subsidiaries in the United States. The company leverages expertise in drug discovery, development, and commercialization, demonstrated through its portfolio companies such as Shamrock Structures, Advanced Life Sciences (ADLS), and Medichem Life Sciences (MCLS). Flavin Ventures secures funding, negotiates strategic development and commercialization agreements, and manages regulatory submissions, including FDA new drug applications. The firm maintains relationships with venture capital groups to facilitate co-investment and follow-on funding. Its management team has experience in R&D, product development, alliances, capital raising, legal and governmental affairs, and company management. | Industrial Services |
Advanced X-Ray Analytical Services, Inc. | |
Innovation Development Institute, Inc.
Innovation Development Institute, Inc. Electronic Equipment/InstrumentsElectronic Technology Develops medical devices | Electronic Technology |
ClostraBio, Inc.
ClostraBio, Inc. Pharmaceuticals: MajorHealth Technology Develops microbiome-modulating therapeutics | Health Technology |
Pyxis Oncology, Inc.
 Pyxis Oncology, Inc. Pharmaceuticals: MajorHealth Technology Operates as a preclinical oncology company focused on developing an arsenal of next-generation therapeutics | Health Technology |
Grove Biopharma, Inc.
Grove Biopharma, Inc. Pharmaceuticals: MajorHealth Technology Manufactures pharmaceuticals | Health Technology |
Portal Innovations LLC
Portal Innovations LLC Investment ManagersFinance Portal Innovations invests in companies located in the United States. The firm targets companies operating in the fields of life sciences, medtech and bioinformatics. It provides financing for seed and early stage capital requirements. | Finance |
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