Aerojet Rocketdyne Holdings, Inc., through its subsidiaries, operates in aerospace and defense, and real estate segments worldwide. The company designs, develops, and manufactures aerospace and defense products and systems for the United States government, including the Department of Defense, the National Aeronautics and Space Administration, and aerospace and defense prime contractors. It also engages in re-zoning, entitlement, sale, and leasing of real estate assets. Aerojet Rocketdyne Holdings, Inc. was formerly known as GenCorp, Inc. and changed its name to Aerojet Rocketdyne Holdings, Inc. in April 2015. Aerojet Rocketdyne Holdings, Inc. was founded in 1915 and is headquartered in El Segundo, California. As of July 28, 2023, Aerojet Rocketdyne Holdings, Inc. operates as a subsidiary of L3Harris Technologies, Inc.