Costar CSGP Institutional Ownership

NASDAQ CSGP

$30.46 +0.97 (+3.29%)

At close: Sep 11, 2026 · 4:00 PM EDT

Institutions by Trading Activity

750 Institutions

Increased 413 55.1%

Unchanged 80 10.7%

Reduced 257 34.3%

Ownership Statistics

13F · as of 30 Jun, 2026

Institutional Ownership

102.28%

▲+2.96 pp QoQ

Shares Held by Institutions

413.32Mn

of 404.10Mn outstanding

▲+7.92% QoQ

Shares Outstanding

404.10Mn

-9.22Mn held outside 13F filers

Institutional Investors

750

filed 13F for Jun 2026

▼-39 vs prior quarter

Net Shares Added (QoQ)

+30.33Mn

accumulated since last quarter

Value of Holdings

$12.59Bn

reported market value

Shares Owned by Institutions

Shares held % of outstanding

Latest —

Average ownership —

Peak ownership —

Shares Purchased/Sold by Institutions

Accumulated Distributed

Latest quarter —

Net over range —

Accumulating quarters —

Ownership Summary

Quarter ending 30 Jun, 2026

Costar Group, Inc. (NASDAQ:CSGP) appears in 750 institutional 13F filings for the quarter ending June 2026.

These investors collectively held 102.3% of Costar's outstanding shares in June 2026, up from 99.3% in March 2026.
Their total shares held in CSGP increased 7.92% quarter over quarter, and separately, investors owning Costar decreased 13.59% from a year ago.
During the quarter, 413 of these 750 funds increased positions in CSGP, 257 reduced exposure, and 80 held steady.
Altogether, these fund groups held 413.32Mn shares in CSGP by June 2026, up by 30.33Mn shares quarter on quarter, and down 5.35Mn shares year over year.
VANGUARD PORTFOLIO MANAGEMENT LLC is the top holder of Costar as of June 30, 2026, with 37.91Mn shares representing 9.38% of outstanding stock.
The largest buyers of Costar for the quarter ending June 2026 were Jupiter Topco LLC (7.83Mn), AQR CAPITAL MANAGEMENT LLC (7.18Mn), EdgePoint Investment Group Inc. (5.95Mn), NORGES BANK (5.95Mn), BAMCO INC /NY/ (5.31Mn).
The largest sellers of Costar for the quarter ending June 2026 were Principal Financial Group Inc (13.91Mn), D. E. Shaw & Co., Inc. (4.87Mn), Goldman Sachs Group Inc (4.12Mn), POLEN CAPITAL MANAGEMENT LLC (3.81Mn), MACKENZIE FINANCIAL CORP (1.48Mn).
According to Business Quant data, leading holders of CSGP for June 2026 are VANGUARD PORTFOLIO MANAGEMENT LLC (37.91Mn), BlackRock, Inc. (33.81Mn), VANGUARD CAPITAL MANAGEMENT LLC (26.68Mn), BAMCO INC /NY/ (21.63Mn), State Street Corp (18.41Mn), Capital International Investors (16.64Mn), BAILLIE GIFFORD & CO (13.15Mn), GEODE CAPITAL MANAGEMENT, LLC (12.17Mn), AKRE CAPITAL MANAGEMENT LLC (11.7Mn), POLEN CAPITAL MANAGEMENT LLC (8.76Mn).

Form 13F Holdings

750 Institutional Holders

Report period 30 Jun, 2026

Total shares held 413.32Mn

Of outstanding 102.28%

#	Institution	CIK	Shares Held	% of Outstanding	Change (QoQ)	Change (%)	Value (USD)
1	VANGUARD PORTFOLIO MANAGEMENT LLC	0002100121	37,914,844	9.38%	▼319,289	-0.84%	$1.07Bn
2	BlackRock, Inc.	0002012383	33,813,969	8.37%	▲5,785	+0.02%	$957.61Mn
3	VANGUARD CAPITAL MANAGEMENT LLC	0002100119	26,683,792	6.60%	▼740,111	-2.70%	$755.68Mn
4	BAMCO INC /NY/	0001017918	21,626,763	5.35%	▲5,312,588	+32.56%	$612.47Mn
5	State Street Corp	0000093751	18,410,876	4.56%	▼240,099	-1.29%	$521.40Mn
6	Capital International Investors	0001562230	16,643,016	4.12%	▲1,129,263	+7.28%	$471.33Mn
7	BAILLIE GIFFORD & CO	0001088875	13,154,165	3.26%	▼456,757	-3.36%	$372.53Mn
8	GEODE CAPITAL MANAGEMENT, LLC	0001214717	12,166,469	3.01%	▼282,183	-2.27%	$343.30Mn
9	AKRE CAPITAL MANAGEMENT LLC	0001112520	11,699,396	2.90%	▲1,351,123	+13.06%	$331.33Mn
10	POLEN CAPITAL MANAGEMENT LLC	0001034524	8,759,314	2.17%	▼3,811,054	-30.32%	$248.06Mn
11	AQR CAPITAL MANAGEMENT LLC	0001167557	8,445,474	2.09%	▲7,182,770	+568.84%	$239.18Mn
12	Jupiter Topco LLC	0002146052	7,832,860	1.94%	▲7,832,860	0.00%	$221.83Mn
13	Invesco Ltd.	0000914208	6,808,377	1.68%	▼328,625	-4.60%	$192.81Mn
14	EdgePoint Investment Group Inc.	0001481669	5,950,002	1.47%	▲5,950,002	0.00%	$168.50Mn
15	NORGES BANK	0001374170	5,949,912	1.47%	▲5,949,912	0.00%	$168.50Mn
16	Morgan Stanley	0000895421	5,485,870	1.36%	▲73,255	+1.35%	$155.36Mn
17	Meritage Group LP	0001427119	5,394,164	1.33%	▲2,065,158	+62.04%	$152.76Mn
18	Goldman Sachs Group Inc	0000886982	5,129,484	1.27%	▼4,116,328	-44.52%	$145.27Mn
19	Jpmorgan Chase & Co	0000019617	4,939,994	1.22%	▲3,090,449	+167.09%	$145.37Mn
20	Federated Hermes, Inc.	0001056288	4,426,727	1.10%	▲3,128,769	+241.05%	$125.36Mn

Showing 1 to 20 of 750 holders