microsoft market cap 1985 to 1999

On December 31, 1999, Microsoft (MSFT) had a market capitalization of $398B, based on 11.08B shares at a price of $35.93.

DATE CLOSE VOLUME OUTSTANDING MARKET CAP
December 1999
$35.93
1,260,977,800
11,076,000,000
$397,951,819,200.00
November 1999
$28.02
1,465,256,000
11,076,000,000
$310,340,659,200.00
October 1999
$28.49
1,062,304,400
11,076,000,000
$315,507,613,200.00
September 1999
$27.87
977,273,600
11,054,000,000
$308,077,190,800.00
August 1999
$28.49
1,347,994,200
11,054,000,000
$314,880,927,800.00
July 1999
$26.41
1,144,701,200
11,054,000,000
$291,918,453,600.00
June 1999
$27.75
887,432,600
11,042,000,000
$306,468,501,600.00
May 1999
$24.83
1,124,257,000
11,042,000,000
$274,186,110,400.00
April 1999
$25.02
1,163,599,400
11,042,000,000
$276,310,591,200.00
March 1999
$27.58
1,569,410,000
11,024,000,000
$304,060,660,800.00
February 1999
$23.10
1,599,103,200
11,024,000,000
$254,655,502,400.00
January 1999
$26.93
1,472,518,800
11,024,000,000
$296,850,964,800.00
December 1998
$21.34
1,101,522,000
10,977,777,800
$234,267,973,807.56
November 1998
$18.77
1,162,706,800
10,977,777,800
$206,080,333,750.50
October 1998
$16.29
1,643,049,200
10,977,777,800
$178,842,271,473.14
September 1998
$16.94
1,192,324,400
10,812,903,200
$183,123,003,433.92
August 1998
$14.76
1,350,039,600
10,812,903,200
$159,622,239,619.04
July 1998
$16.92
1,229,298,000
10,812,903,200
$182,915,395,692.48
June 1998
$16.68
1,233,152,400
10,820,000,000
$180,434,320,000.00
May 1998
$13.05
1,095,382,400
10,820,000,000
$141,204,246,000.00
April 1998
$13.87
1,018,977,200
10,820,000,000
$150,049,596,000.00
March 1998
$13.77
1,099,927,600
10,740,000,000
$147,906,984,000.00
February 1998
$13.04
1,402,018,400
10,740,000,000
$140,057,118,000.00
January 1998
$11.48
1,486,108,000
10,740,000,000
$123,272,646,000.00
December 1997
$9.94
1,437,224,000
10,672,000,000
$106,122,368,000.00