HEI vs STT Comparison

Heico is an aerospace and defense supplier that focuses on creating replacement parts for commercial aircraft and components for defense products. In commercial aerospace, Heico is the largest independent producer of replacement aircraft parts. In the defense market, the company produces niche subcomponents used in targeting technology as well as simulation equipment, among other categories. It operates two segments: the flight support group and the electronic technologies group. Both supply the aerospace and defense sectors to different degrees. Heico is persistently acquisitive, focusing on companies in similar or adjacent markets that offer strong cash flow and profitable growth potential.

State Street is a leading provider of financial services, including investment servicing, investment management, and investment research and trading. With approximately $54 trillion in assets under custody and administration, and $5.7 trillion in assets under management, as of Dec. 31, 2025, State Street operates globally in more than 100 geographic markets and employs about 51,500 worldwide.