On December 31, 1990, Microsoft (MSFT) had a market capitalization of $4.8B, based on 7.53B shares at a price of $0.64.
| DATE | CLOSE | VOLUME | OUTSTANDING | MARKET CAP |
|---|---|---|---|---|
December 31 1990 | $0.64 | 23,702,400 | 7,526,666,700 | $4,832,120,021.40 |
December 28 1990 | $0.64 | 20,268,000 | 7,526,666,700 | $4,816,314,021.33 |
December 27 1990 | $0.64 | 22,629,600 | 7,526,666,700 | $4,799,755,354.59 |
December 26 1990 | $0.64 | 16,214,400 | 7,526,666,700 | $4,816,314,021.33 |
December 24 1990 | $0.64 | 13,550,400 | 7,526,666,700 | $4,832,120,021.40 |
December 21 1990 | $0.65 | 33,472,800 | 7,526,666,700 | $4,864,484,688.21 |
December 20 1990 | $0.64 | 46,994,400 | 7,526,666,700 | $4,847,926,021.47 |
December 19 1990 | $0.64 | 34,264,800 | 7,526,666,700 | $4,808,034,687.96 |
December 18 1990 | $0.64 | 51,876,000 | 7,526,666,700 | $4,832,120,021.40 |
December 17 1990 | $0.63 | 27,288,000 | 7,526,666,700 | $4,751,584,687.71 |
December 14 1990 | $0.63 | 48,636,000 | 7,526,666,700 | $4,727,499,354.27 |
December 13 1990 | $0.62 | 50,709,600 | 7,526,666,700 | $4,671,049,354.02 |
December 12 1990 | $0.62 | 71,560,800 | 7,526,666,700 | $4,655,243,353.95 |
December 11 1990 | $0.62 | 61,768,800 | 7,526,666,700 | $4,631,158,020.51 |
December 10 1990 | $0.63 | 55,526,400 | 7,526,666,700 | $4,751,584,687.71 |
December 07 1990 | $0.63 | 81,921,600 | 7,526,666,700 | $4,768,143,354.45 |
December 06 1990 | $0.64 | 108,201,600 | 7,526,666,700 | $4,799,755,354.59 |
December 05 1990 | $0.64 | 68,630,400 | 7,526,666,700 | $4,832,120,021.40 |
December 04 1990 | $0.64 | 54,547,200 | 7,526,666,700 | $4,783,949,354.52 |
December 03 1990 | $0.63 | 68,241,600 | 7,526,666,700 | $4,743,305,354.34 |