| Company Name | City | State | Country/Region | Website | Service Type |
|---|---|---|---|---|---|
| Aizen Therapeutics | San Diego | California | United States | www.aizentx.com | Core Company |
| Akcea Therapeutics Inc. | Ottawa | Ontario | Canada | akceatx.com | Core Subsidiary |
| Akebia Therapeutics, Inc. | Cambridge | Massachusetts | United States | akebia.com | Core Company |
| Akero Therapeutics | San Francisco | California | United States | http://akerotx.com/ | Core Subsidiary |
| Akkeri Nonclinical Development Partners, Inc. | Lakeway | Texas | United States | Akkeri.com | Investor/Venture Capital |
| Akouos, Inc. | Boston | Massachusetts | United States | akouos.com | Core Company |
| Aleta Biotherapeutics | Natick | Massachusetts | United States | aletabio.com | Core Company |
| Alexion Pharma Canada | Mississauga | Ontario | Canada | Core Subsidiary | |
| Alexion Pharmaceuticals, Inc | Washington | District of Columbia | United States | https://alexion.com/ | Core Company |
| Alexion, AstraZeneca Rare Disease | Boston | Massachusetts | United States | alexion.com | Core Subsidiary |
| Alexza Pharmaceuticals, Inc. | Fremont | California | United States | alexza.com | Core Company |
| Alkermes | Waltham | Massachusetts | United States | alkermes.com | Core Subsidiary |
| Alkermes, Inc. | Washington | District of Columbia | United States | alkermes.com | Core Company |
| Alkeus Pharmaceuticals, Inc. | Cambridge | Massachusetts | United States | alkeuspharma.com | Core Company |
| Allele Biotechnology and Pharmaceuticals, Inc. | San Diego | California | United States | allelebiotech.com | Core Company |
| AllExcel, Inc. | West Haven | Connecticut | United States | nanoviricides.com | Core Subsidiary |
| Alliance Healthcare | Woking | United Kingdom | Core Subsidiary | ||
| Alloy Therapeutics LLC | Lexington | Massachusetts | United States | alloytx.com | Core Company |
| AllSci | North Bethesda | Maryland | United States | allsci.com | Contract Research Organization |
| Alnylam France SAS | Paris | France | Core Subsidiary |
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