| Company Name | City | State | Country/Region | Website | Service Type |
|---|---|---|---|---|---|
| Armatus Bio | Columbus | Ohio | United States | armatusbio.com | Core Company |
| ARMO Biosciences | San Francisco | California | United States | General Company | |
| Arnold & Porter Kaye Scholer LLP | Washington | District of Columbia | United States | aporter.com | Legal |
| Aronora, Inc. | Portland | Oregon | United States | https://aronorabio.com/ | Core Company |
| Arrow Therapeutics, Ltd | London | United Kingdom | arrowt.co.uk | Core Subsidiary | |
| Artasome Therapeutics | Dover | Delaware | United States | Core Company | |
| ARTBIO, Inc. | Cambridge | Massachusetts | United States | Core Company | |
| Aruna Bio | Athens | Georgia | United States | arunabio.com | Core Company |
| AscellaHealth | Berwyn | Pennsylvania | United States | ascellahealth.com | Service Provider (SVCP) |
| Asher Biotherapeutics, Inc | South San Francisco | California | United States | asherbio.com | Core Company |
| 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 |
| Aspiro Therapeutics, Inc. | Tucson | Arizona | United States | www.aspirotx.com | Core Company |
| Assembly Biosciences | South San Francisco | California | United States | assemblybio.com | Core Company |
| Astero Erado Inc. | College Station | Texas | United States | General Company | |
| AstraZeneca | Wilmington | Delaware | United States | astrazeneca.com | Core Company |
| AstraZeneca Canada Inc | Mississauga | Ontario | Canada | astrazeneca.ca | Core Subsidiary |
| AstraZeneca China | Shanghai | China | en.astrazeneca.com.cn | Core Subsidiary |
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