The Aspire test doesn't have a single "composite score." Instead, it reports scores in several different ways, depending on the grade level and specific test taken. There are scores for individual subjects (like reading, math, and science) and sometimes more granular scores within those subjects. Aspire also often provides a growth measure, showing student progress over time.
There's no overall number that's universally called a "composite score." The report will show a variety of scores designed to give a comprehensive picture of a student's academic performance. To understand the specific scores reported for a particular student, you need to refer to the individual student's score report which will explain the meaning of each score.