In the Data Science Studio, the computation "Company Size" uses 4 labels to classify companies by company size (from Clearbit's employee data)
vSMB: 1 to 10 employees
SMB: 11 to 100 employees
MidMarket: 101 to 1000 employees
Ent: 1001 or more employees
If you would like to create your own classification with different thresholds and see how each segment of companies performs, you can create a new Computation following these instructions then look at the Univariate Analysis for this computation.