what was aapl market cap in 2015

On December 31, 2015, Apple (AAPL) had a market capitalization of $531.6B, based on 22.38B shares at a price of $23.76.

DATECLOSEVOLUMEOUTSTANDINGMARKET CAP
December 31 2015
$23.76
163,649,200
22,376,508,000
$531,574,086,397.20
December 30 2015
$24.22
100,855,200
22,376,508,000
$541,976,924,966.40
December 29 2015
$24.54
123,724,800
22,376,508,000
$549,148,595,780.40
December 28 2015
$24.11
106,816,800
22,376,508,000
$539,450,617,213.20
December 24 2015
$24.38
54,281,600
22,376,508,000
$545,561,641,548.00
December 23 2015
$24.51
130,629,600
22,376,508,000
$548,490,726,445.20
December 22 2015
$24.20
131,157,600
22,376,508,000
$541,522,681,854.00
December 21 2015
$24.22
190,362,400
22,376,508,000
$542,026,153,284.00
December 18 2015
$23.93
385,813,200
22,376,508,000
$535,460,885,836.80
December 17 2015
$24.60
179,091,200
22,376,508,000
$550,359,164,863.20
December 16 2015
$25.13
224,954,000
22,376,508,000
$562,276,893,024.00
December 15 2015
$24.94
213,292,400
22,376,508,000
$557,985,078,789.60
December 14 2015
$25.39
257,274,800
22,376,508,000
$568,034,368,532.40
December 11 2015
$25.54
187,544,800
22,376,508,000
$571,569,856,796.40
December 10 2015
$26.22
116,850,800
22,376,508,000
$586,669,524,394.80
December 09 2015
$26.09
185,445,600
22,376,508,000
$583,892,599,752.00
December 08 2015
$26.68
137,238,000
22,376,508,000
$597,072,362,964.00
December 07 2015
$26.69
128,336,800
22,376,508,000
$597,325,217,504.40
December 04 2015
$26.86
231,108,000
22,376,508,000
$601,113,560,308.80
December 03 2015
$26.00
166,278,000
22,376,508,000
$581,771,306,793.60
December 02 2015
$26.24
133,546,400
22,376,508,000
$587,224,461,793.20
December 01 2015
$26.48
139,409,600
22,376,508,000
$592,579,160,157.60
November 30 2015
$26.70
156,721,200
22,376,508,000
$597,425,911,790.40
November 27 2015
$26.59
52,185,600
22,376,508,000
$594,951,070,005.60
November 25 2015
$26.64
85,553,200
22,376,508,000
$596,063,182,453.20