| Company Name | City | State | Country/Region | Website | Service Type |
|---|---|---|---|---|---|
| MBX Biosciences, Inc. | Carmel | Indiana | United States | https://mbxbio.com/ | Core Company |
| McDonnell Boehnen Hulbert & Berghoff LLP | Chicago | Illinois | United States | mbhb.com | Legal |
| Medarex, Inc | Princeton | New Jersey | United States | medarex.com | Core Subsidiary |
| MEDiC Life Sciences | San Carlos | California | United States | medic-life-sciences.com | Core Company |
| Medical Alley Association | Golden Valley | Minnesota | United States | medicalalley.org | State Affiliate |
| Medical Marketing Economics, LLC | Oxford | Mississippi | United States | m2econ.com | Service Provider (SVCP) |
| Medicenna | Toronto | Ontario | Canada | medicenna.com | Core Company |
| Medicine Park Co., Ltd. | Seoul | Korea, Republic of | www.medicinepark.kr | Core Company | |
| MedImmune | Gaithersburg | Maryland | United States | medimmune.com | Core Subsidiary |
| MedImmune Ventures | Gaithersburg | Maryland | United States | medimmune.com | Non-Core Subsidiary |
| Medley Farmaceutica Ltda. | Sao Paulo | São Paulo | Brazil | medley.com.br | Core Subsidiary |
| MEDRAD, Inc | Indianola | Pennsylvania | United States | medrad.com | Core Subsidiary |
| MeiraGTx | New York | New York | United States | meiragtx.com | Core Company |
| Melinta Therapeutics | Morristown | New Jersey | United States | melinta.com | Core Company |
| Merck | Kenilworth | New Jersey | United States | www.merck.com | Core Company |
| Merck Animal Health | Boxmeer | Netherlands | merck-animal-health.com | Core Subsidiary | |
| Merck Research Laboratories | New London | New Hampshire | United States | merck.com | Core Subsidiary |
| Merck Sharp & Dohme LLC | Rahway | New Jersey | United States | Merck.com | Core Subsidiary |
| Merlin Biotech, Inc. | Doylestown | Pennsylvania | United States | merlinbiotech.com | Core Company |
| MerLion Pharmaceuticals GmbH | Berlin | Germany | merlionpharma.com | General Company |
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