CoStar Group

CSGP • NASDAQ

CoStar Group is a real estate - services company in the real estate sector on NASDAQ, led by Scott Wheeler, with a market cap of $28.9B. As of Q3 2025, 97% of shares are held by 873 institutional investors, with VANGUARD GROUP INC as the largest holder at 16.54%.

Chief Executive OfficerScott Wheeler

Market Cap$28.9B

Real Estate - Services

Real Estate

Employees6.2K

Websitecostar.com

Country

United States of America

Overview

Overview of institutional ownership in CSGP as of Q3 2025 with a market cap of $35.7B

All Institutions

Institutions: 873
Value Held: $34.8B
Shares Held: 412.3M
Avg Position: $39.8M
Median Position: $1.2M

Hedge Funds

Hedge Funds: 61
Value Held: $2.5B
Shares Held: 29.9M
Avg Position: $41.3M
Median Position: $4.6M

Ownership Breakdown

Institutional (non-HF)

90.2%

$32.2B

Hedge Funds

7.05%

$2.5B

Retail & Other

2.75%

$983.8M

Based on market cap of $35.7B as of Q3 2025. Institutional (non-HF) excludes hedge funds to avoid double counting.

Biggest Investors

Institutions with the largest positions in CSGP as of Q3 2025

Institution	Key People	Position Value	Ownership	Owned Since	Total AUM (Long)
VANGUARD GROUP INC Institution	Salim Ramji CEO	$5.9B 0.09% of portfolio	16.54% 70.1M shares	≤ Q2 2013 Held for 12y 5m+	$6.69T
B BlackRock, Inc. Institution	-	$3.0B 0.05% of portfolio	8.53% 36.1M shares	≤ Q2 2013 Held for 12y 5m+	$5.67T
BAMCO INC /NY/ Long Only Manager	Ronald Stephen Baron CEO	$1.6B 4.31% of portfolio	4.55% 19.3M shares	≤ Q2 2013 Held for 12y 5m+	$37.7B
PRINCIPAL FINANCIAL GROUP INC Institution	Deanna Strable CEO	$1.6B 0.79% of portfolio	4.40% 18.6M shares	≤ Q2 2013 Held for 12y 5m+	$197.71B
STATE STREET CORP Institution	Ronald P. O'Hanley CEO	$1.5B 0.05% of portfolio	4.32% 18.3M shares	≤ Q2 2013 Held for 12y 5m+	$2.88T
GEODE CAPITAL MANAGEMENT LLC ETF Provider	David Kenneth Lane CEO	$1.1B 0.07% of portfolio	2.97% 12.6M shares	≤ Q2 2013 Held for 12y 5m+	$1.57T
AKRE CAPITAL MANAGEMENT LLC Hedge Fund•Multi-Strategy	John Hallmark Neff CEO	$785.2M 7.83% of portfolio	2.20% 9.3M shares	Q4 2019 Held for 5y 11m	$10.0B
MORGAN STANLEY RIA/Wealth	Jed Finn CEO	$720.8M 0.04% of portfolio	2.02% 8.5M shares	≤ Q2 2013 Held for 12y 5m+	$1.65T
B BAILLIE GIFFORD & CO Institution	-	$695.3M 0.52% of portfolio	1.95% 8.2M shares	Q3 2016 Held for 9y 2m	$134.80B
MASSACHUSETTS FINANCIAL SERVICES CO /MA/ Long Only Manager	Edward Murray Maloney CEO	$624.9M 0.19% of portfolio	1.75% 7.4M shares	Q2 2014 Held for 11y 5m	$322.72B

Net Capital Flow

Institutional buying and selling activity for CSGP in Q3 2025

Net Flow: −$674.6M
Buyers: 359
Sellers: 370
Total Bought: +$1.7B
Total Sold: −$2.4B
Avg Position: $41.0M

Biggest Buyers

Institution	Net Bought	Current Position
N Nuveen, LLC Institution	+$204.6M +2.4M shares	$295.9M 3.5M shares
HENDERSON GROUP PLC Institution	+$184.0M +2.2M shares	$524.5M 6.2M shares
CITADEL ADVISORS LLC Hedge Fund•Multi-Strategy	+$143.0M +1.7M shares	$145.7M 1.7M shares
VANGUARD GROUP INC Institution	+$102.0M +1.2M shares	$5.9B 70.1M shares
MORGAN STANLEY RIA/Wealth	+$95.5M +1.1M shares	$720.8M 8.5M shares
B BlackRock, Inc. Institution	+$92.3M +1.1M shares	$3.0B 36.1M shares
Capital Research Global Investors RIA/Wealth	+$89.6M +1.1M shares	$421.3M 5.0M shares
MASSACHUSETTS FINANCIAL SERVICES CO /MA/ Long Only Manager	+$69.3M +821.1K shares	$624.9M 7.4M shares
ING INVESTMENT MANAGEMENT LLC Insurance Manager	+$51.8M +614.5K shares	$155.8M 1.8M shares
STATE STREET CORP Institution	+$46.5M +551.2K shares	$1.5B 18.3M shares

Biggest Sellers

Institution	Net Sold	Current Position
C Capital International Investors Institution	−$677.6M −8.0M shares	$572.7M 6.8M shares
T T. Rowe Price Investment Management, Inc. Insurance Manager	−$251.7M −3.0M shares	$296.2M 3.5M shares
BANK OF AMERICA CORP /DE/ Institution	−$120.6M −1.4M shares	$311.9M 3.7M shares
VIKING GLOBAL INVESTORS LP Hedge Fund•Long/Short	−$115.5M −1.4M shares	$156.1M 1.8M shares
SG Capital Management LLC Hedge Fund•Event Driven	−$71.3M −845.4K shares	$8.0M 94.7K shares
M MIZUHO MARKETS AMERICAS LLC Institution	−$61.9M −734.1K shares	$432.2M 5.1M shares
I Ion Asset Management Ltd. Institution	−$53.6M −635.8K shares	$45.1M 534.0K shares
B BNP PARIBAS ARBITRAGE, SA Institution	−$51.2M −607.4K shares	$56.7M 671.9K shares
Candlestick Capital Management LP Hedge Fund•Long/Short	−$47.9M −596.1K shares	Sold Off 0 shares
M MACQUARIE GROUP LTD Institution	−$47.9M −567.5K shares	$360.0M 4.3M shares

Entry and Exit Activity

Institutions that initiated new positions or completely exited CSGP in Q3 2025

New Positions: 49
New Value: $20.9M
Exited Positions: 62
Exited Value: $152.3M

New Positions

Institution	Position Value
BCJ Capital Management, LLC RIA/Wealth	$3.8M 45.2K shares
K KIDS CAPITAL MANAGEMENT, L.P. Institution	$3.4M 40.0K shares
B Blue Capital, Inc. RIA/Wealth	$2.3M 27.6K shares
FIRST FINANCIAL BANKSHARES INC Institution	$2.0M 23.5K shares
Main Management ETF Advisors, LLC Institution	$1.4M 17.1K shares
Maridea Wealth Management LLC RIA/Wealth	$1.1M 14.7K shares
INTEGRITY ALLIANCE, LLC. RIA/Wealth	$807.1K 9.6K shares
Colony Capital, Inc. Institution	$615.9K 7.3K shares
Advisors Preferred, LLC Institution	$615.8K 7.4K shares
CHESAPEAKE CAPITAL CORP /IL/ Long Only Manager	$522.6K 6.2K shares

Exited Positions

Institution	Previous Position
Candlestick Capital Management LP Hedge Fund•Long/Short	$47.9M 596.1K shares
Bridgewater Associates, LP Hedge Fund•Global Macro	$34.8M 432.7K shares
T Tribune Investment Group LP Hedge Fund•Event Driven	$14.5M 180.0K shares
C CIBC World Markets Inc. Institution	$12.2M 151.5K shares
DRIEHAUS CAPITAL MANAGEMENT LLC Hedge Fund•Event Driven	$7.7M 96.2K shares
WESTFIELD CAPITAL MANAGEMENT CO LP Long Only Manager	$6.0M 74.5K shares
A AXA Institution	$3.2M 39.8K shares
Castle Hook Partners LP Hedge Fund•Global Macro	$2.5M 31.6K shares
T TEXAS PERMANENT SCHOOL FUND Institution	$2.4M 29.7K shares
TWO SIGMA INVESTMENTS LLC Hedge Fund•Multi-Strategy	$2.1M 26.3K shares

Options Activity

Institutions with the largest Call and Put options positions in CSGP as of Q3 2025

Call Positions: 24
Call Value: $149.6M
Put Positions: 19
Put Value: $67.5M

Call Positions

Institution	Position Value
SUSQUEHANNA INTERNATIONAL GROUP, LLP Private Equity	$37.4M 4.4K contracts
CITADEL ADVISORS LLC Hedge Fund•Multi-Strategy	$33.0M 3.9K contracts
P PEAK6 LLC Institution	$18.6M 2.2K contracts
J JANE STREET GROUP, LLC Institution	$12.2M 1.4K contracts
W WOLVERINE TRADING, LLC Institution	$10.4M 1.2K contracts
P Parallax Volatility Advisers, LLC Hedge Fund•Vol Arbitrage	$8.9M 1.1K contracts
MILLENNIUM MANAGEMENT LLC Hedge Fund•Multi-Strategy	$8.3M 987.0 contracts
Caption Management, LLC Hedge Fund•Long/Short	$5.7M 675.0 contracts
CAPITAL FUND MANAGEMENT S.A. Hedge Fund•Quant Macro	$3.3M 389.0 contracts
T Twin Tree Management, LP Hedge Fund•Vol Arbitrage	$3.1M 371.0 contracts

Put Positions

Institution	Position Value
SUSQUEHANNA INTERNATIONAL GROUP, LLP Private Equity	$18.9M 2.2K contracts
MILLENNIUM MANAGEMENT LLC Hedge Fund•Multi-Strategy	$13.0M 1.5K contracts
Schonfeld Strategic Advisors LLC Hedge Fund•Multi-Strategy	$8.4M 1.0K contracts
Walleye Trading LLC RIA/Wealth	$4.6M 544.0 contracts
CAPITAL FUND MANAGEMENT S.A. Hedge Fund•Quant Macro	$3.9M 467.0 contracts
W WOLVERINE TRADING, LLC Institution	$3.7M 436.0 contracts
CITADEL ADVISORS LLC Hedge Fund•Multi-Strategy	$3.5M 410.4 contracts
CAPSTONE INVESTMENT ADVISORS, LLC Hedge Fund•Multi-Strategy	$2.8M 335.0 contracts
Walleye Trading Advisors, LLC Hedge Fund•Multi-Strategy	$2.6M 306.0 contracts
P PEAK6 LLC Institution	$2.2M 257.0 contracts

Most Committed Institutions

Institutions with CSGP as the highest % of their portfolio as of Q3 2025

Institution	Key People	Portfolio Weight	Ownership	Owned Since	Total AUM (Long)
CADEN CAPITAL PARTNERS, LP Hedge Fund•Long/Short	Barry Jason Simon Managing Partner	12.22% $29.5M	0.08% 349.5K shares	Q3 2024 Held for 1y 2m	$241.2M
Visualize Group LP Hedge Fund•Multi-Strategy	Chukudi Melvin Ike Managing Partner	12.12% $36.2M	0.10% 428.8K shares	Q4 2024 Held for 11 months	$298.6M
ShawSpring Partners LLC Hedge Fund•Long/Short	Dennis Hong Managing Partner	11.24% $75.6M	0.21% 896.0K shares	Q4 2024 Held for 11 months	$672.6M
LANDMARK INVESTMENT PARTNERS, L.P. Hedge Fund•Long/Short	Steven Louis Frankel Managing Partner	10.32% $12.6M	0.04% 149.4K shares	Q4 2024 Held for 11 months	$122.1M
Bares Capital Management, Inc. Long Only Manager	James Jeffrey Creel CEO	9.54% $103.5M	0.29% 1.2M shares	Q2 2016 Held for 9y 5m	$1.1B
M MIZUHO MARKETS AMERICAS LLC Institution	-	9.11% $432.2M	1.21% 5.1M shares	Q1 2025 Held for 8 months	$4.7B
AKRE CAPITAL MANAGEMENT LLC Hedge Fund•Multi-Strategy	John Hallmark Neff CEO	7.83% $785.2M	2.20% 9.3M shares	Q4 2019 Held for 5y 11m	$10.0B
RGM Capital, LLC Hedge Fund•Value	Robert Glyn Moses Managing Partner	7.43% $176.6M	0.49% 2.1M shares	Q1 2022 Held for 3y 8m	$2.4B
ThornTree Capital Partners LP Hedge Fund•Long/Short	Mark Christopher Moore CIO	6.59% $43.0M	0.12% 510.2K shares	Q4 2024 Held for 11 months	$653.4M
I Ion Asset Management Ltd. Institution	-	6.37% $45.1M	0.13% 534.0K shares	Q4 2024 Held for 11 months	$707.1M

Hedge Fund Spotlight

Discover hedge funds investing in CSGP

SHAKER INVESTMENTS LLC/OH

Hedge Fund • Long/Short

Portfolio ManagerEdward Paul Hemmelgarn

Portfolio Value: $249.9M
Positions: 97
Last Reported: Q3 2025

Sector Allocation

Position in CoStar Group

Market Value: $1.8M
Shares Held: 21.6K
Portfolio Weight: 0.73%
Owned Since: 2025-Q3

Top Holding	Sector	Market Value	Weight
1 Axos Financial AX	Banks - Regional Financial Services	$33.8M	13.54%
2 Broadcom Inc. AVGO	Semiconductors Technology	$12.3M	4.92%
3 Nvidia NVDA	Semiconductors Technology	$12.3M	4.92%