Company · Ownership research

COSTAR GROUP, INC. CSGP

CIK 0001057352 · CUSIP 22160N109

Insider trading Initial holdings Institutional holders

Quarter-end disclosures, not live holdings.

Several CUSIPs are reported for this company; this page shows CUSIP 22160N109 (CSGP), not CUSIP 22160N909 (CSGP), CUSIP 22160N959 (CSGP), and does not merge CUSIPs.

This page lists the top 20 of 774 rows by value; the complete set is available through the API.

Some filings reported values in thousands; those figures were scaled ×1,000 to dollars.

Top 20 institutions

Weight means this stock's share of the manager's own portfolio.

By reported value

#	Manager	Value	Manager weight	Change vs prior	Source
01	VANGUARD GROUP INC CIK 102909 · View history	$4.96B 65,754,320 shares	0.09%	+136.98K(+0.20%)Added	SEC filing ↗ Nov 13, 2024	▾
02	BlackRock, Inc. CIK 2012383 · View history	$2.93B 38,885,893 shares	0.06%	—	SEC filing ↗ Nov 13, 2024	▾
03	PRINCIPAL FINANCIAL GROUP INC CIK 1126328 · Amended · View history	$1.46B 19,387,519 shares	0.80%	+16.54K(+0.10%)Added	SEC filing ↗ Oct 31, 2024	▾
04	BAMCO INC /NY/ CIK 1017918 · View history	$1.42B 18,785,436 shares	3.76%	-485.56K(-2.50%)Reduced	SEC filing ↗ Nov 14, 2024	▾
05	STATE STREET CORP CIK 93751 · View history	$1.29B 17,059,744 shares	0.05%	+722.15K(+4.40%)Added	SEC filing ↗ Nov 14, 2024	▾
06	MASSACHUSETTS FINANCIAL SERVICES CO /MA/ CIK 912938 · View history	$858.52M 11,380,192 shares	0.26%	-4.38K(0.00%)Reduced	SEC filing ↗ Nov 12, 2024	▾
07	GEODE CAPITAL MANAGEMENT, LLC CIK 1214717 · View history	$850.66M 11,308,986 shares	0.07%	+236.41K(+2.10%)Added	SEC filing ↗ Nov 12, 2024	▾
08	Capital International Investors CIK 1562230 · View history	$730.79M 9,687,096 shares	0.14%	+5.69M(+142.40%)Added	SEC filing ↗ Nov 13, 2024	▾
09	AKRE CAPITAL MANAGEMENT LLC CIK 1112520 · View history	$673.99M 8,934,093 shares	5.61%	+163.67K(+1.90%)Added	SEC filing ↗ Nov 13, 2024	▾
10	BAILLIE GIFFORD & CO CIK 1088875 · View history	$663.81M 8,799,131 shares	0.50%	-252.65K(-2.80%)Reduced	SEC filing ↗ Nov 5, 2024	▾
11	MACQUARIE GROUP LTD CIK 1418333 · View history	$575.14M 7,623,871 shares	0.62%	-825.99K(-9.80%)Reduced	SEC filing ↗ Nov 14, 2024	▾
12	JANUS HENDERSON GROUP PLC CIK 1274173 · View history	$499.96M 6,627,229 shares	0.26%	-5.49M(-45.30%)Reduced	SEC filing ↗ Nov 14, 2024	▾
13	Bank of New York Mellon Corp CIK 1390777 · View history	$451.72M 5,987,794 shares	0.08%	-129.47K(-2.10%)Reduced	SEC filing ↗ Nov 12, 2024	▾
14	Artisan Partners Limited Partnership CIK 1466153 · View history	$425.14M 5,635,481 shares	0.64%	-168.67K(-2.90%)Reduced	SEC filing ↗ Nov 12, 2024	▾
15	T. Rowe Price Investment Management, Inc. CIK 1897612 · View history	$388.41M 5,148,632 shares	0.23%	+1.46M(+39.40%)Added	SEC filing ↗ Nov 14, 2024	▾
16	NORGES BANK CIK 1374170 · Amended · View history	$387.54M 5,136,997 shares	0.05%	+40.37K(+0.80%)Added	SEC filing ↗ Nov 13, 2024	▾
17	Vulcan Value Partners, LLC CIK 1556785 · View history	$334.19M 4,429,889 shares	5.59%	+290.90K(+7.00%)Added	SEC filing ↗ Nov 13, 2024	▾
18	BANK OF AMERICA CORP /DE/ CIK 70858 · Amended · View history	$317.50M 4,208,707 shares	0.03%	-561.01K(-11.80%)Reduced	SEC filing ↗ Nov 14, 2024	▾
19	BLAIR WILLIAM & CO/IL CIK 902367 · View history	$290.51M 3,850,836 shares	0.85%	-546.90K(-12.40%)Reduced	SEC filing ↗ Nov 12, 2024	▾
20	BROWN ADVISORY INC CIK 1345929 · View history	$284.16M 3,766,658 shares	0.36%	-133.52K(-3.40%)Reduced	SEC filing ↗ Nov 13, 2024	▾

Showing 20 / 774 institutions. The complete set is available through the API.

Coverage & totals by quarter

Reporting institutions

774

Cancelled or null records excluded

Disclosed shares

397,609,391

Not deduplicated across managers

Disclosed value

$30.02B

Not market cap or free float

Reporting institutions by quarter

Counts also change with data coverage and reporting entities; they do not measure net buying. Distinct managers with a live stock row in this CUSIP; totals may include overlapping filings and are not a share of the company.

COSTAR GROUP, INC. · Q3 2024

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This page includes 20 of 774 reporting institutions. Log in to look up the full history beyond 3 years, use advanced screening & filtering, download CSV, and get the complete set through the Akkru API.

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Sources, coverage & how to read this data

Figures are as reported to the SEC and merged with later amendments where Akkru could match them. Preview limits apply to what is listed, not to the totals, which come from the complete reported data. Nothing is zero-filled: a missing quarter or month is shown as missing.