On December 31, 1998, Microsoft (MSFT) had a market capitalization of $231.5B, based on 10.98B shares at a price of $21.09.
| DATE | CLOSE | VOLUME | OUTSTANDING | MARKET CAP |
|---|---|---|---|---|
December 31 1998 | $21.09 | 23,834,400 | 10,977,777,800 | $231,521,333,802.00 |
December 30 1998 | $21.14 | 34,942,800 | 10,977,777,800 | $232,042,778,247.50 |
December 29 1998 | $21.37 | 29,651,600 | 10,977,777,800 | $234,546,809,363.68 |
December 28 1998 | $21.65 | 23,636,400 | 10,977,777,800 | $237,677,671,592.24 |
December 24 1998 | $21.56 | 13,832,400 | 10,977,777,800 | $236,633,684,923.46 |
December 23 1998 | $21.83 | 34,940,000 | 10,977,777,800 | $239,659,160,485.14 |
December 22 1998 | $21.05 | 41,350,000 | 10,977,777,800 | $231,104,178,245.60 |
December 21 1998 | $21.36 | 48,112,000 | 10,977,777,800 | $234,442,520,474.58 |
December 18 1998 | $20.96 | 59,648,000 | 10,977,777,800 | $230,060,191,576.82 |
December 17 1998 | $20.43 | 46,963,600 | 10,977,777,800 | $224,322,107,120.76 |
December 16 1998 | $20.34 | 60,024,000 | 10,977,777,800 | $223,279,218,229.76 |
December 15 1998 | $20.05 | 51,719,600 | 10,977,777,800 | $220,149,453,778.98 |
December 14 1998 | $19.46 | 64,077,600 | 10,977,777,800 | $213,575,960,432.34 |
December 11 1998 | $20.38 | 51,728,800 | 10,977,777,800 | $223,696,373,786.16 |
December 10 1998 | $20.01 | 57,015,600 | 10,977,777,800 | $219,626,911,555.70 |
December 09 1998 | $20.32 | 44,781,600 | 10,977,777,800 | $223,070,640,451.56 |
December 08 1998 | $19.95 | 77,585,200 | 10,977,777,800 | $219,001,178,221.10 |
December 07 1998 | $20.31 | 89,809,200 | 10,977,777,800 | $222,965,253,784.68 |
December 04 1998 | $19.37 | 44,352,000 | 10,977,777,800 | $212,637,360,430.44 |
December 03 1998 | $18.57 | 51,426,800 | 10,977,777,800 | $203,872,702,634.92 |
December 02 1998 | $19.27 | 65,759,600 | 10,977,777,800 | $211,593,373,761.66 |
December 01 1998 | $19.69 | 86,330,800 | 10,977,777,800 | $216,184,280,437.62 |
November 30 1998 | $18.55 | 70,900,000 | 10,977,777,800 | $203,664,124,856.72 |
November 27 1998 | $19.47 | 26,335,600 | 10,977,777,800 | $213,784,538,210.54 |
November 25 1998 | $18.89 | 41,394,000 | 10,977,777,800 | $207,419,622,642.10 |