Costar Group, Inc. (CSGP) Institutional Ownership

Institutions by Trading Activity

Ownership Statistics

0Shares Outstanding

4,037,671Shares held by institutions

$165,100,367Value of institutional holdings

98.64%Institutional ownership %

-2.00%Shares Changed QoQ

862No. of institutional investors

Shares Owned by Institutions

Shares Purchased/Sold by Institutions

Ownership Summary

Costar Group, Inc. (NASDAQ:CSGP) has 822 institutional investors that have filed 13F reports for the period ending December 2025.

Collectively, these holders controlled 97.0% of Costar's outstanding shares in December 2025, down from 99.4% in September 2025.
They increased total shares held in Costar by 0.26% from the prior quarter, while the number of investors in CSGP increased 4.58% year over year.
Activity in CSGP broke down as 367 buyers, 373 sellers, and 82 unchanged among 822 total holders.
The aggregate institutional position in Costar amounted to 407.28Mn shares as of December 2025, up by 1.07Mn shares quarter on quarter, and down 10.53Mn shares year over year.
VANGUARD GROUP INC holds the largest position in CSGP at 70.11Mn shares as of December 31, 2025, or 16.7% of shares outstanding.
The biggest buyers of Costar for the quarter ending December 2025 included NORGES BANK (7.09Mn), BAILLIE GIFFORD & CO (4.69Mn), Capital International Investors (4.05Mn), NOMURA ASSET MANAGEMENT INTERNATIONAL INC. (3.91Mn), T. Rowe Price Investment Management, Inc. (2.21Mn).
Leading sellers of Costar shares for the quarter ending December 2025 were MASSACHUSETTS FINANCIAL SERVICES CO /MA/ (4.25Mn), MACQUARIE GROUP LTD (4.2Mn), Bank Of America Corp /De/ (3.89Mn), Morgan Stanley (3.25Mn), Jpmorgan Chase & Co (3.06Mn).
Per Business Quant, the top 10 investors in CSGP for the quarter ending December 2025 include VANGUARD GROUP INC (70.11Mn), BlackRock, Inc. (33.97Mn), BAMCO INC /NY/ (19.5Mn), 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).

823 Institutional Holders

4,037,671 Total Shares Held

Rows:

Download Data

Owner Name	Date	Change (QoQ)	Change (%)	Value (USD)
BlackRock, Inc.	31 Dec, 2025	-2,162,532	-5.98%	$0.00
VANGUARD GROUP INC	31 Dec, 2025	52,558	0.08%	$0.00
T. Rowe Price Investment Management, Inc.	31 Dec, 2025	2,208,727	62.92%	$0.00
Vulcan Value Partners, LLC	31 Dec, 2025	653,412	17.05%	$0.00
BAMCO INC /NY/	31 Dec, 2025	242,533	1.26%	$0.00
MIZUHO MARKETS AMERICAS LLC	31 Dec, 2025	-707,100	-13.80%	$0.00
Barclays Plc	31 Dec, 2025	-1,193,604	-33.95%	$0.00
State Street Corp	31 Dec, 2025	348,224	1.90%	$0.00
Nuveen, LLC	31 Dec, 2025	54,271	1.55%	$0.00
HSBC HOLDINGS PLC	31 Dec, 2025	1,257,220	175.27%	$0.00
Principal Financial Group Inc	31 Dec, 2025	-1,057,296	-5.68%	$0.00
UBS Group AG	31 Dec, 2025	-2,496,647	-54.18%	$0.00
Rockefeller Capital Management L.P.	31 Dec, 2025	4,726	68.18%	$0.00
BAILLIE GIFFORD & CO	31 Dec, 2025	4,691,543	56.92%	$0.00
Spyglass Capital Management LLC	31 Dec, 2025	575,732	57.42%	$0.00
World Investment Advisors	31 Dec, 2025	3,263	92.73%	$0.00
GEODE CAPITAL MANAGEMENT, LLC	31 Dec, 2025	-419,288	-3.33%	$0.00
Pictet Asset Management Holding SA	31 Dec, 2025	206,716	24.35%	$0.00
Purpose Unlimited Inc.	31 Dec, 2025	132	0.00%	$0.00
Capital International Investors	31 Dec, 2025	4,053,456	59.71%	$0.00

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