Costar Group, Inc. (CSGP) Institutional Ownership

Institutions by Trading Activity

Ownership Statistics

441,428,571Shares Outstanding

3,037,409Shares held by institutions

$138,931,088Value of institutional holdings

89.89%Institutional ownership %

1.06%Shares Changed QoQ

801No. of institutional investors

Shares Owned by Institutions

Shares Purchased/Sold by Institutions

Ownership Summary

A total of 801 institutions have reported a stake in Costar Group, Inc. (NASDAQ:CSGP) as of December 2025, according to recent 13F filings with the SEC.

These investors collectively held 89.9% of the company's total shares outstanding in December 2025, down from 92.9% in September 2025.
On a quarter-over-quarter basis, institutional holdings shifted by 1.06%, with a year-over-year an increase of 1.78% in the count of filers.
Of these 801 institutional investors, 354 increased their holdings in Costar, while 364 of them reduced positions, and 83 investors maintained their exposure.
The total number of shares held by institutions in Costar increased to 396.78Mn as of December 2025, a net change of up by 4.16Mn shares quarter on quarter, and down 1.33Mn shares year over year.
The top institutional stake in Costar as of December 31, 2025 belongs to VANGUARD GROUP INC, which owns 70.11Mn shares, or 15.88% of the company.
Among the most significant buyers of Costar during December 2025 were NORGES BANK (7.09Mn), BAILLIE GIFFORD & CO (4.69Mn), Capital International Investors (4.05Mn), NOMURA ASSET MANAGEMENT INTERNATIONAL INC. (3.91Mn), GOLDMAN SACHS GROUP INC (1.56Mn).
Leading sellers of Costar stock in December 2025 included MASSACHUSETTS FINANCIAL SERVICES CO /MA/ (4.25Mn), MACQUARIE GROUP LTD (4.20Mn), MORGAN STANLEY (3.25Mn), FRANKLIN RESOURCES INC (2.57Mn), UBS Group AG (2.47Mn).
The top 10 institutional holders of Costar for the quarter ending December 2025 included VANGUARD GROUP INC (70.11Mn), BlackRock, Inc. (33.97Mn), BAMCO INC /NY/ (19.50Mn), STATE STREET CORP (18.63Mn), PRINCIPAL FINANCIAL GROUP INC (17.57Mn), BAILLIE GIFFORD & CO (12.93Mn), GEODE CAPITAL MANAGEMENT, LLC (12.18Mn), Capital International Investors (10.84Mn), AKRE CAPITAL MANAGEMENT LLC (9.62Mn), JANUS HENDERSON GROUP PLC (7.47Mn).

801 Institutional Holders

3,037,409 Total Shares Held

Rows:

Download Data

Owner Name	Date	Shares Held	Change (QoQ)	Change (%)	Value (USD)
VANGUARD GROUP INC	31 Dec, 2025	70,108,999	52,558	0.08%	$4,714,129,093.00
BlackRock, Inc.	31 Dec, 2025	33,970,626	-2,162,532	-5.98%	$2,284,184,864.00
BAMCO INC /NY/	31 Dec, 2025	19,498,099	242,533	1.26%	$1,311,052,177.00
STATE STREET CORP	31 Dec, 2025	18,632,352	348,224	1.90%	$1,252,839,348.00
PRINCIPAL FINANCIAL GROUP INC	31 Dec, 2025	17,566,074	-1,057,296	-5.68%	$1,181,146,072.00
BAILLIE GIFFORD & CO	31 Dec, 2025	12,933,185	4,691,543	56.92%	$869,627,359.00
GEODE CAPITAL MANAGEMENT, LLC	31 Dec, 2025	12,182,167	-419,288	-3.33%	$816,237,290.00
Capital International Investors	31 Dec, 2025	10,842,010	4,053,456	59.71%	$729,019,965.00
AKRE CAPITAL MANAGEMENT LLC	31 Dec, 2025	9,617,805	311,320	3.35%	$646,701,208.00
JANUS HENDERSON GROUP PLC	31 Dec, 2025	7,473,380	1,256,573	20.21%	$502,487,485.00
NORGES BANK	31 Dec, 2025	7,090,495	7,090,495	0.00%	$476,764,884.00
Capital Research Global Investors	31 Dec, 2025	5,566,962	573,108	11.48%	$374,328,936.00
MORGAN STANLEY	31 Dec, 2025	5,291,136	-3,251,888	-38.06%	$355,776,152.00
POLEN CAPITAL MANAGEMENT LLC	31 Dec, 2025	4,890,936	-1,489,973	-23.35%	$328,866,546.00
Vulcan Value Partners, LLC	31 Dec, 2025	4,485,021	653,412	17.05%	$301,527.00
MIZUHO MARKETS AMERICAS LLC	31 Dec, 2025	4,416,116	-707,100	-13.80%	$296,939,640.00
Amundi	31 Dec, 2025	4,114,516	979,380	31.24%	$276,660,055.00
Bank of New York Mellon Corp	31 Dec, 2025	4,113,002	-250,369	-5.74%	$276,558,187.00
NOMURA ASSET MANAGEMENT INTERNATIONAL INC.	31 Dec, 2025	3,909,161	3,909,161	0.00%	$262,852,000.00
GOLDMAN SACHS GROUP INC	31 Dec, 2025	3,751,312	1,556,100	70.89%	$252,238,230.00

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