On November 18, 2015, Square (SQ) had a market capitalization of $2.1B, based on 234.55M shares at a price of $9.

On November 18, 2015, Square (SQ) had a market capitalization of $2.1B, based on 234.55M shares at a price of $9.
Market caps are currently calculated for a specific asset (ticker), and are not aggregated for a company (e.g., "GOOG" and "GOOGL" for Alphabet).