COSTAR GROUP INC

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CSGP·22160N109·US·Common Stock·Real Estate - Real Estate Services-13D/G

CSGP (COSTAR GROUP INC) is held by 275 institutional investors as of Q2 2026. Largest holders: VANGUARD PORTFOLIO MANAGEMENT LLC ($1.1B), BlackRock, Inc. ($957.6M), VANGUARD CAPITAL MANAGEMENT LLC ($755.7M). Net institutional sentiment: Mixed. In Q2 2026, 4 members of Congress and 144 funds bought CSGP.

275

Holders

(21 Elite)

$10.7B

Total Value

50% (286)

Consensus

144 buying - 142 selling

13F: Jun 30, 2026Insider & Congress: Updated regularly

Smart Money Verdict

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Institutional (13F)84

Insider (Form 4)59

Activist (13D/13G)44

Congressional (STOCK Act)71

Holder Quality

64

★★★★★

Elite

46

★★★★

Strong

72

★★★

Solid

30

★★

Below

79

★

Weak

Held by 275 funds

21 elite

Who's Trading

Source dates: Price Oct 15, 2026 · Insiders Oct 16, 2026 · Activists Aug 14, 2026 · Congress Sep 10, 2026

InsiderRJRossmann Robin JackTax 756 shOct 15, 2026

CongressGilbert CisnerosBuy $1,001 - $15,000Aug 19, 2026

ActivistBaron Capital Group, Inc.5.3%Aug 14, 2026

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Top Holders

Top Holders (275)History

AllNewIncreasedHeldDecreasedExitedFirst report

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Fund	Action	Shares	Value	Weight	Est. P&L	Conviction
VPVANGUARD PORTFOLIO MANAGEMENT LLC	Decreased	37.9M(-0.8%)	$1.1B	0.0%	-20.67%	0
BlackRock, Inc.	Increased	33.8M(+0.0%)	$957.6M	0.0%	-57.73%	32
VAVANGUARD CAPITAL MANAGEMENT LLC	Decreased	26.7M(-2.7%)	$755.7M	0.0%	-20.67%	0
BAMCO INC /NY/	Increased	21.6M(+32.6%)	$612.5M	0.9%	-11.51%	57
STATE STREET CORP	Decreased	18.4M(-1.3%)	$521.4M	0.0%	-53.71%	0
Capital International Investors	Increased	16.6M(+7.3%)	$471.3M	0.1%	-46.40%	34
BAILLIE GIFFORD & CO	Decreased	13.2M(-3.4%)	$372.5M	0.3%	-53.82%	0
GEODE CAPITAL MANAGEMENT, LLC	Decreased	12.2M(-2.3%)	$343.3M	0.0%	-50.13%	0
AKRE CAPITAL MANAGEMENT LLC	Increased	11.7M(+13.1%)	$331.3M	6.5%	-48.12%	71
POLEN CAPITAL MANAGEMENT LLC	Decreased	8.8M(-30.3%)	$248.1M	2.1%	-39.28%	0
AQR CAPITAL MANAGEMENT LLC	Increased	8.4M(+568.8%)	$239.2M	0.1%	+0.86%	50
JTJupiter Topco LLC	First report	7.8M	$221.8M	0.1%	+12.99%	0
Invesco Ltd.	Decreased	6.8M(-57.3%)	$192.8M	0.0%	-53.15%	0
EdgePoint Investment Group Inc.	New	6M	$168.5M	1.3%	+12.99%	70
MORGAN STANLEY	Increased	5.5M(+1.4%)	$155.4M	0.0%	-57.81%	31
JPMORGAN CHASE & CO	Increased	4.9M(+167.1%)	$145.4M	0.0%	-17.15%	49
GOLDMAN SACHS GROUP INC	Decreased	5.1M(-44.5%)	$145.3M	0.0%	-39.50%	0
FEDERATED HERMES, INC.	Increased	4.4M(+241.1%)	$125.4M	0.2%	-4.98%	58
Capital Research Global Investors	Decreased	4.2M(-4.1%)	$118.8M	0.0%	-59.24%	0
PRINCIPAL FINANCIAL GROUP INC	Decreased	3.8M(-78.6%)	$107.4M	0.1%	-55.30%	0

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CSGPCOSTAR GROUP INC

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High Conviction Moves-Smart Money Convergence-Fund Consensus-Double-Down Detection

Data sourced from four public-disclosure sources: SEC 13F, Form 4, 13D/13G, and House/Senate STOCK Act disclosures. Not financial advice. Full disclaimer