Siegfried Holding AG, together with its subsidiaries, engages in contract development and manufacturing of active pharmaceutical ingredient (API) and finished dosage forms worldwide. The company offers drug substances, including exclusive synthesis that manufactures custom APIs. It also offers an API portfolio, including non-exclusive APIs and pharma-grade substances that focus on anesthetics, pain and addiction treatment applications, and central nervous and respiratory diseases, as well as caffeine for human health and nutrition. In addition, the company offers drug products, including steriles, which includes fill and finish in vials, ampoules, cartridges, and pre-filled syringes; ophthalmics, such as sterile ointments, gels, and suspensions and solutions; inhalation products, including capsules in medical devices for inhalation applications; oral solid dosage forms, which includes tablets and capsules; and viral vectors, such as AAV and lentiviruses for gene therapy. Further, it provides technologies with chemistry capabilities, analytical services, formulation technologies, bridging technologies, containment technology, and cell and gene therapies. The company was founded in 1873 and is headquartered in Zofingen, Switzerland.