TickerFacts.

CoStar Group, Inc. (CSGP): Weighted Average Diluted Shares

Annual figures by period end, from SEC filings.

Stock splits: 10-for-1, first reflected in a filing dated 2021-07-28. Figures are as filed: per-share figures and share counts last reported before a split are on the old share basis, so changes and growth rates across a split are not shown. Splits are read from the filings' own restatements, so a share conversion in a merger or reorganization shows up the same way.

420.70M
Year ended 2025-12-31
+1.9%
3-year compound annual growth
+1.9%
5-year compound annual growth
2009-12-31: 19.93M2010-12-31: 20.71M2011-12-31: 23.53M2012-12-31: 26.95M2013-12-31: 28.21M2014-12-31: 30.64M2015-12-31: 31.95M2016-12-31: 32.44M2017-12-31: 33.56M2018-12-31: 36.45M2019-12-31: 366.30M2020-12-31: 383.27M2021-12-31: 394.20M2022-12-31: 397.80M2023-12-31: 406.90M2024-12-31: 407.80M2025-12-31: 420.70M420.70M
2009-12-31 Weighted Average Diluted Shares (shares) 2025-12-31

Paler bars were last filed before a stock split, on the old share basis.

Period endedWeighted Average Diluted SharesChange YoYSource filing
2025-12-31420.70M+3.2%2026-02-26, From 2025-01-01
2024-12-31407.80M+0.2%2026-02-26, From 2024-01-01
2023-12-31406.90M+2.3%2026-02-26, From 2023-01-01
2022-12-31397.80M+0.9%2025-02-20, From 2022-01-01
2021-12-31394.20M+2.9%2024-02-22, From 2021-01-01
2020-12-31383.27M+4.6%2023-02-22, From 2020-01-01
2019-12-31366.30Mn/c2022-02-23, From 2019-01-01
2018-12-3136.45M+8.6%2021-02-24, From 2018-01-01
2017-12-3133.56M+3.5%2020-02-26, From 2017-01-01
2016-12-3132.44M+1.5%2019-02-28, From 2016-01-01
2015-12-3131.95M+4.3%2018-02-23, From 2015-01-01
2014-12-3130.64M+8.6%2017-02-24, From 2014-01-01
2013-12-3128.21M+4.7%2016-02-26, From 2013-01-01
2012-12-3126.95M+14.5%2015-02-26, From 2012-01-01
2011-12-3123.53M+13.6%2014-02-20, From 2011-01-01
2010-12-3120.71M+3.9%2013-03-01, From 2010-01-01
2009-12-3119.93Mn/a2012-02-23, From 2009-01-01