Costar Group, Inc.

CSGP

Exchange: Nasdaq
Industry: Services-Business Services, NEC
SEC CIK: 0001057352

SEC filings (opens in a new tab)

In the last 90 days, Costar Group, Inc. insiders filed 1 open-market purchase and 2 sales; 760 institutions reported holding it in 13F filings for Q2 2026, worth $12.3B in total; superinvestors Akre Capital Management and Weitz Investment Management hold it.

13F holders, Q1 2021

Institutional positions in Costar Group, Inc. as of Mar 31, 2021. Investment managers with $100 million or more in US stocks report their long positions on Form 13F within 45 days after each quarter ends. How 13F works

Institutional holders: 593; No complete 13F data for Q4 2020
Shares held: 38.0M; No complete 13F data for Q4 2020
Total value: $31.2B; No complete 13F data for Q4 2020

Holders and value by quarter

Institutions reporting CSGP on Form 13F each quarter since Q1 2021, and the total value they reported. Values are as of each quarter end, so they also move with the share price.

Institutional holdersQ1 2021: 593 institutions

Value heldQ1 2021: $31.2B

Institutions holding CSGP and their total value by quarter
Quarter	Holders	Value
Q2 2026	760	$12.3B
Q1 2026	797	$16.8B
Q4 2025	847	$28.6B
Q3 2025	905	$35.1B
Q2 2025	873	$34.3B
Q1 2025	858	$34.0B
Q4 2024	805	$29.3B
Q3 2024	773	$30.2B
Q2 2024	767	$29.4B
Q1 2024	767	$40.1B
Q4 2023	737	$34.7B
Q3 2023	690	$30.1B
Q2 2023	714	$35.6B
Q1 2023	692	$27.0B
Q4 2022	704	$30.5B
Q3 2022	634	$29.1B
Q2 2022	591	$23.2B
Q1 2022	589	$25.2B
Q4 2021	633	$30.2B
Q3 2021	594	$32.3B
Q2 2021	607	$31.1B
Q1 2021	593	$31.2B

Institutions, Q1 2021

Shares, value and share of portfolio for each institution holding Costar Group, Inc..

Livermore's 13F data starts with Q1 2021, so Q1 2021 has no change from the previous quarter.

Institutions holding CSGP in Q1 2021
Institution	Shares	Value	% of portfolio	Change in shares	Action
Price T Rowe Associates Inc	4,237,437	$3.48B	0.35%	–	–
Vanguard Group Inc	3,476,587	$2.86B	0.08%	–	–
BlackRock Inc.	3,052,392	$2.51B	0.07%	–	–
Bamco Inc	1,940,259	$1.59B	3.93%	–	–
Janus Henderson Group PLC	1,503,270	$1.24B	0.56%	–	–
Baillie Gifford & Co	1,147,435	$943.1M	0.53%	–	–
Franklin Resources Inc	1,048,877	$862.0M	0.35%	–	–
Akre Capital Management LLCSuperinvestorAkre Capital Management	976,760	$802.8M	5.47%	–	–
Principal Financial Group Inc	954,248	$784.3M	0.55%	–	–
Sands Capital Management, LLC	910,335	$748.2M	1.45%	–	–
Massachusetts Financial Services Co	868,210	$713.6M	0.22%	–	–
State Street Corp	770,380	$633.2M	0.04%	–	–
Vulcan Value Partners, LLC	663,575	$545.4M	3.22%	–	–
Third Point LLCSuperinvestorThird Point	550,000	$452.0M	3.05%	–	–
Wellington Management Group LLP	489,057	$402.0M	0.07%	–	–
Veritas Asset Management LLP	482,781	$396.8M	2.17%	–	–
Geode Capital Management, LLC	475,220	$390.0M	0.06%	–	–
FMR LLC	400,778	$329.4M	0.03%	–	–
Alkeon Capital Management LLC	385,098	$316.5M	1.20%	–	–
Norges Bank	371,605	$305.4M	0.07%	–	–
Waddell & Reed Financial Inc	370,963	$304.9M	0.63%	–	–
Findlay Park Partners LLP	357,365	$293.7M	2.04%	–	–
Ownership Capital B.V.	343,995	$282.7M	3.68%	–	–
Bares Capital Management, Inc.	334,758	$275.1M	5.14%	–	–
Fred Alger Management, LLC	300,083	$246.6M	0.65%	–	–
Bank of America Corp	297,269	$244.3M	0.03%	–	–
Wells Fargo & Company	294,120	$241.7M	0.06%	–	–
Northern Trust Corp	290,853	$239.1M	0.04%	–	–
Federated Hermes, Inc.	274,409	$225.5M	0.44%	–	–
Blair William & Co	262,646	$215.9M	0.81%	–	–
Invesco Ltd.	257,302	$211.5M	0.06%	–	–
Winslow Capital Management, LLC	247,027	$203.0M	0.86%	–	–
Riverbridge Partners LLC	241,706	$198.7M	2.26%	–	–
Legal & General Group Plc	241,057	$198.1M	0.07%	–	–
DF Dent & Co Inc	227,771	$187.2M	2.17%	–	–
Putnam Investments LLC	223,721	$183.9M	0.31%	–	–
Ameriprise Financial Inc	221,246	$181.8M	0.06%	–	–
Amundi Asset Management US, Inc.	220,805	$181.5M	0.14%	–	–
Voya Investment Management LLC	211,149	$173.5M	0.35%	–	–
Pelham Capital Ltd.	208,536	$171.4M	10.64%	–	–
Millennium Management LLC	194,404	$159.8M	0.22%	–	–
Bank of New York Mellon Corp	192,945	$158.6M	0.03%	–	–
Ensign Peak Advisors, Inc	184,231	$151.4M	0.33%	–	–
Nuveen Asset Management, LLC	181,097	$148.8M	0.05%	–	–
Sumitomo Mitsui Trust Holdings, Inc.	170,104	$139.8M	0.09%	–	–
Segall Bryant & Hamill, LLC	163,546	$134.4M	1.33%	–	–
Victory Capital Management Inc	152,402	$125.3M	0.13%	–	–
Swiss National Bank	151,600	$124.6M	0.08%	–	–
CIBC Private Wealth Group, LLC	148,253	$121.8M	0.31%	–	–
UBS Asset Management Americas Inc	139,214	$114.4M	0.05%	–	–
Granahan Investment Management Inc	138,668	$114.0M	2.42%	–	–
APG Asset Management N.V.	159,451	$111.5M	0.19%	–	–
JPMorgan Chase & Co	128,034	$105.2M	0.02%	–	–
Korea Investment CORP	126,029	$103.6M	0.33%	–	–
Echo Street Capital Management LLC	125,848	$103.4M	0.92%	–	–
Charles Schwab Investment Management Inc	120,072	$98.7M	0.04%	–	–
Senator Investment Group LP	120,000	$98.6M	2.03%	–	–
Kayne Anderson Rudnick Investment Management LLC	119,280	$98.0M	0.26%	–	–
Goldman Sachs Group Inc	114,349	$94.0M	0.03%	–	–
TD Asset Management Inc	113,485	$93.3M	0.10%	–	–
Teacher Retirement System of Texas	105,714	$86.9M	0.48%	–	–
TimesSquare Capital Management, LLC	101,115	$83.1M	0.71%	–	–
Envestnet Asset Management Inc	91,525	$75.2M	0.05%	–	–
William Blair Investment Management, LLC	90,807	$74.6M	0.24%	–	–
Mitsubishi UFJ Trust & Banking Corp	87,825	$72.2M	0.16%	–	–
Weitz Investment Management, Inc.SuperinvestorWeitz Investment Management	83,450	$68.6M	3.03%	–	–
Rathbone Brothers plc	82,900	$68.1M	0.87%	–	–
Dimensional Fund Advisors LP	82,056	$67.4M	0.02%	–	–
California Public Employees Retirement System	81,474	$67.0M	0.05%	–	–
Westfield Capital Management Co LP	79,077	$65.0M	0.40%	–	–
Baird Financial Group, Inc.	78,861	$64.8M	0.18%	–	–
American Century Companies Inc	77,164	$63.4M	0.05%	–	–
California State Teachers Retirement System	73,654	$60.5M	0.08%	–	–
Parametric Portfolio Associates LLC	72,559	$59.6M	0.03%	–	–
American Capital Management Inc	70,791	$58.2M	1.76%	–	–
Wildcat Capital Management, LLC	69,987	$57.5M	7.03%	–	–
STRS Ohio	62,044	$51.0M	0.19%	–	–
New York State Common Retirement Fund	59,491	$48.9M	0.05%	–	–
Geneva Capital Management LLC	59,197	$48.7M	0.83%	–	–
Peregrine Capital Management LLC	56,292	$46.3M	0.86%	–	–
National Pension Service	55,743	$45.8M	0.10%	–	–
State Board of Administration of Florida Retirement System	55,003	$45.2M	0.09%	–	–
Voloridge Investment Management, LLC	54,821	$45.1M	0.33%	–	–
SEI Investments Co	50,750	$43.1M	0.11%	–	–
Citigroup Inc	51,150	$42.0M	0.04%	–	–
Capital World Investors	50,000	$41.1M	0.01%	–	–
Stephens Investment Management Group LLC	49,009	$40.3M	0.58%	–	–
Morgan Stanley	48,162	$39.6M	0.01%	–	–
Chicago Capital, LLC	47,463	$39.0M	1.65%	–	–
Ci Investments Inc.	46,490	$38.2M	0.16%	–	–
Deutsche Bank AG	45,788	$37.6M	0.02%	–	–
Truist Financial Corp	43,177	$35.5M	0.06%	–	–
Arrowstreet Capital, Limited Partnership	42,967	$35.3M	0.05%	–	–
UBS Group AG	42,708	$35.1M	0.02%	–	–
Kornitzer Capital Management Inc	42,629	$35.0M	0.56%	–	–
Neuberger Berman Group LLC	40,279	$33.0M	0.03%	–	–
Rhumbline Advisers	40,074	$32.9M	0.04%	–	–
Parnassus Investments	38,700	$31.8M	0.08%	–	–
Credit Suisse AG	38,659	$31.8M	0.02%	–	–
Marshall Wace North America L.P.	37,486	$30.8M	0.13%	–	–