Altair Engineering Inc. is an American multinational information technology company headquartered in Troy, Michigan. It provides software and cloud solutions for simulation, IoT, high performance computing, data analytics, and artificial intelligence. Altair Engineering is the creator of the HyperWorks CAE software product, among numerous other software packages and suites. The company was founded in 1985 and went public in 2017. It was traded on the Nasdaq stock exchange under the stock ticker symbol ALTR. In 2025, it was acquired by Siemens for $10.6 billion. Altair develops and provides software and cloud services for product development, high-performance computing, simulation, artificial intelligence, and data intelligence. Wikipedia