Alterity Therapeutics Limited, an Australian biopharmaceutical firm, focuses on the discovery and development of novel drug treatments for various neurological disorders, such as Alzheimer's, Huntington's, and Parkinson's diseases. Its prominent experimental therapy, ATH434, has completed Phase I clinical trials targeting Parkinson's disease. The company is also advancing PBT2, a compound that has successfully undergone Phase IIa clinical testing for Alzheimer's disease. Established in 1997, the entity was formerly known as Prana Biotechnology Limited before rebranding to Alterity Therapeutics Limited in April 2019, and its main operations are based in Melbourne, Australia.