Costar CSGP Institutional Ownership

NASDAQ CSGP

$27.40 +0.45 (+1.67%)

At close: Sep 30, 2026 · 4:00 PM EDT

Institutions by Trading Activity

752 Institutions

Increased 416 55.3%

Unchanged 80 10.6%

Reduced 256 34.0%

Ownership Statistics

13F · as of 30 Jun, 2026

Institutional Ownership

102.32%

▲+4.89 pp QoQ

Shares Held by Institutions

413.48Mn

of 404.10Mn outstanding

▲+7.98% QoQ

Shares Outstanding

404.10Mn

-9.38Mn held outside 13F filers

Institutional Investors

752

filed 13F for Jun 2026

▼-37 vs prior quarter

Net Shares Added (QoQ)

+30.54Mn

accumulated since last quarter

Value of Holdings

$11.33Bn

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 752 institutional 13F filings for the quarter ending June 2026.

These investors held 102.3% of outstanding shares in June 2026, up from 97.4% in March 2026.
Their total shares held in CSGP increased 7.98% from the prior quarter, while the number of investors in Costar decreased 13.36% year over year.
Of these 752 funds, 416 grew their exposure to Costar, 256 cut back, and 80 maintained positions.
Institutional investors collectively held 413.48Mn shares in Costar as of June 2026, up by 30.54Mn shares quarter on quarter, and up 308.36K shares year over year.
As of June 30, 2026, the biggest holder of Costar is VANGUARD PORTFOLIO MANAGEMENT LLC at 37.91Mn shares, representing 9.38% of shares outstanding.
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 biggest sellers of Costar for the quarter ending June 2026 included 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).
Per Business Quant data, the top 10 holders of Costar for the quarter ending 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

751 Institutional Holders

Report period 30 Jun, 2026

Total shares held 413.48Mn

Of outstanding 102.32%

#	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 751 holders