| Symbol | Name | Country | Exchange |
|---|---|---|---|
| CRL | Charles River Laboratories International, Inc. | US | NYSE |
| IDRA | Idera Pharmaceuticals, Inc. | US | NASDAQ |
| PAHC | Phibro Animal Health Corporation | US | NASDAQ |
| MRK | Merck & Company Inc | AR | BA |
| 072020 | Choong Ang Vaccine Laboratory Co. Ltd | KR | KQ |
| 5EA | Elanco Animal Health Incorporated | DE | F |
| 6MK | Merck & Co. Inc | DE | F |
| 6MK | Merck & Co. Inc | DE | XETRA |
| 0QAH | Merck & Company Inc | GB | IL |
| MRCK34 | Merck & Co. Inc | BR | SA |
| MRK | Merck & Company Inc | AT | VI |
| 0QAH | Merck & Company Inc | GB | LSE |
| MRK | Merck & Company Inc | MX | MX |