- X-THERMA INCUnited States
- Xellia PharmaceuticalsDenmark
- XenoPort, Inc.United States
- XENOVA SCIENCES LLCUnited Kingdom
- Xepa-soul Pattinson (malaysia) Sdn BhdMalaysia
- Xeris Pharmaceuticals, Inc.United States
- Xi'an Libang Pharmaceutical Co.,ltd.China
- Xiamen Mogengel Biotechnology Co., Ltd.China
- XIAMEN SINOPEG BIOTECH CO LTDChina
- XILING LAB CO LTDChina
- XINJIANG NUZILINE BIO PHARMACEUTICAL CO LTDChina
- XIUSHI BIOPHARMA (NANTONG) CO LTDChina
- Xl Laboratories Pvt. Ltd.India
- XLT Biopharmaceuticals Inc.United States
- XPharma Inc.United States
- XSPIRE PHARMA LLCItaly
- XTTRIUM LABORATORIES INCUnited States
- Xuelong Group Co., Ltd.China
- XUZHOU WANBANG JINQIAO PHARMA CO LTDChina