when did costar go public

CoStar (CSGP) went public on June 29, 1998.

DATEOPENHIGHLOWCLOSEVOLUME
October 2026
$27.91
$32.65
$27.10
$32.31
63,614,840
September 2026
$32.00
$32.79
$26.52
$27.40
131,177,000
August 2026
$29.47
$33.82
$29.26
$32.07
144,871,300
July 2026
$29.08
$31.40
$25.89
$28.76
171,525,900
June 2026
$32.62
$34.82
$28.18
$28.32
161,769,800
May 2026
$35.28
$36.09
$31.36
$32.20
166,924,500
April 2026
$40.34
$41.29
$33.32
$34.61
133,731,500
March 2026
$43.58
$49.03
$39.18
$40.34
134,021,923
February 2026
$61.46
$62.67
$43.17
$44.63
150,911,164
January 2026
$67.11
$70.57
$57.01
$61.50
144,456,442
December 2025
$67.97
$69.30
$62.00
$67.24
81,200,192
November 2025
$67.85
$70.63
$64.72
$68.80
87,963,923
October 2025
$84.22
$85.24
$63.82
$68.81
84,730,086
September 2025
$88.87
$91.89
$82.79
$84.37
57,025,088
August 2025
$94.70
$97.43
$84.57
$89.49
56,718,724
July 2025
$80.40
$97.15
$79.94
$95.19
64,154,537
June 2025
$72.84
$83.48
$71.35
$80.40
58,784,183
May 2025
$74.74
$78.56
$71.94
$73.56
62,711,091
April 2025
$78.79
$83.68
$71.21
$74.17
83,897,767
March 2025
$76.01
$83.03
$74.08
$79.23
76,181,283
February 2025
$76.52
$79.45
$72.50
$76.25
70,105,555
January 2025
$72.17
$77.54
$68.41
$76.60
47,616,888
December 2024
$80.70
$81.23
$69.61
$71.59
52,175,174
November 2024
$72.71
$82.49
$70.77
$81.34
52,553,631
October 2024
$75.36
$79.78
$68.26
$72.79
75,972,032