Leidos Holdings, Inc. (NYSE:LDOS) is among the 10 Best Space Exploration Stocks to Buy Now. Leidos Holdings, Inc. (NYSE:LDOS) has received Amazon Web Services’ (AWS) Trusted Secure Enclave (TSE) Vetted Partner certification, a distinguished honor acknowledging the highest standards in secure enclave design and implementation. The Leidos Secure Environment, a cloud-based governance platform built on AWS TSE, facilitates safe collaboration across multi-organizational and multinational environments, which is ...