| Company Name | City | State | Country/Region | Website | Service Type |
|---|---|---|---|---|---|
| Ashvattha Therapeutics, Inc. | Redwood City | California | United States | ashvatthatherapeutics.com | Core Company |
| Asklepion Pharmaceuticals, LLC | Baltimore | Maryland | United States | asklepionpharm.com | Core Company |
| Asklepios BioPharmaceutical, Inc. (AskBio) | Durham | North Carolina | United States | askbio.com | Core Company |
| Aspa Therapeutics, Inc. | Palo Alto | California | United States | aspatx.com/ | General Company |
| Assembly Biosciences | South San Francisco | California | United States | assemblybio.com | Core Company |
| Atea Pharmaceuticals | Boston | Massachusetts | United States | ateapharma.com | Core Company |
| Auckland UniServices Limited | Auckland | New Zealand | uniservices.co.nz | Non-Profit | |
| Audition Therapeutics, Inc. | Palo Alto | California | United States | General Company | |
| Aureka Biotechnologies, Inc. | Laguna Hills | California | United States | aurekabio.com | Service Provider (SVCP) |
| Aurora Biosciences Corporation | San Diego | California | United States | vrtx.com | Core Subsidiary |
| Auspex Pharmaceuticals, Inc | La Jolla | California | United States | auspexpharma.com | Core Company |
| Autoimmunity BioSolutions | Houston | Texas | United States | abstherapeutics.com | Core Company |
| Auxilium Pharmaceuticals, Inc | Chesterbrook | Pennsylvania | United States | auxilium.com | Core Company |
| Avalyn Pharma Inc. | Boston | Massachusetts | United States | avalynpharma.com | Core Company |
| Avantor Performance Materials | Phillipsburg | New Jersey | United States | avantormaterials.com | Association |
| AviadoBio | London | United Kingdom | aviadobio.com | Core Company | |
| Avid Radiopharmaceuticals, Inc | Philadelphia | Pennsylvania | United States | avidrp.com | Core Subsidiary |
| Avidia, Inc | Mountain View | California | United States | avidia.com | Core Subsidiary |
| Avidity Biosciences | San Diego | California | United States | aviditybio.com | Core Company |
| Avila Therapeutics, Inc. | Bedford | Massachusetts | United States | avilatx.com | Core Subsidiary |
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