MRK vs PRTA

Merck & Company Inc.

Merck & Co., Inc. operates as a healthcare company worldwide. It operates through two segments, Pharmaceutical and Animal Health segments. The Pharmaceutical segment offers human health pharmaceutical products in the areas of oncology, hospital acute care, immunology, neuroscience, virology, cardiovascular, diabetes, and women's health, as well as vaccine products. The Animal Health segment provides discovers, develops, manufactures, and markets a range of veterinary pharmaceuticals, vaccines, and health management solutions and services, as well as a suite of digitally connected identification, traceability, and monitoring products. The company has collaborations with AstraZeneca PLC; Bayer AG; Eisai Co., Ltd.; and Ridgeback Biotherapeutics. It serves drug wholesalers and retailers, hospitals, and government agencies; managed health care providers, such as health maintenance organizations, pharmacy benefit managers, and other institutions; and physicians and physician distributors, veterinarians, and animal producers. The company has collaboration agreement with Gilead Sciences, Inc. to co-develop and co-commercialize long-acting investigational treatment combinations of Lenacapavir and Islatravir in HIV; Amathus Therapeutics to develop treatments for neurodegenerative diseases; and Linnaeus Therapeutics, Inc. to evaluate LNS8801 in combination with KEYTRUDA for patients with advanced cancer. It also has a collaboration with Biomed X Gmbh for building on ongoing research projects in the fields of oncology (DNA damage response and RNA splicing) and autoimmunity (intestinal epithelial barrier in autoimmune diseases); and a collaboration agreement with NGM Biopharmaceuticals, Inc. to focus primarily on the development of novel medicines for unmet patient needs in retinal and CVM diseases, including heart failure. Merck & Co., Inc. was founded in 1891 and is headquartered in Kenilworth, New Jersey.

Prothena Corporation plc

Prothena Corporation plc, a late-stage clinical company, focuses on discovery and development of novel therapies for life-threatening diseases in the United States. The company is involved in developing PRX002/RG7935 that is in Phase 2 clinical trial for treating Parkinson's disease and other related synucleinopathies; and PRX004, an antibody that is in Phase 1 clinical trial for the treatment of ATTR amyloidosis. Its discovery-stage programs include Tau for treating Alzheimer's disease, frontotemporal dementia, progressive supranuclear palsy, chronic traumatic encephalopathy, and other tauopathies; Aß, or Amyloid Beta, a protein for the treatment of Alzheimer's disease; TDP-43 for amyotrophic lateral sclerosis and frontotemporal dementia; and other products for neurodegenerative diseases. The company has a license, development, and commercialization agreement with F. Hoffmann-La Roche Ltd. and Hoffmann-La Roche Inc. to develop and commercialize antibodies that target alpha-synuclein; and a collaboration agreement with Bristol-Myers Squibb to develop antibodies. Prothena Corporation plc was founded in 2012 and is based in Dublin, Ireland.