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Costar Group, Inc.

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

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 $11.7B in total; superinvestors Akre Capital Management and Weitz Investment Management hold it.

13F holders, Q2 2021

Institutional positions in Costar Group, Inc. as of Jun 30, 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
607
+19 vs. Q1 2021
Shares held
375.3M
+1.70M (+0.5%) vs. Q1 2021Converted for a 10-for-1 split
Total value
$31.1B
+$378.3M (+1.2%) vs. Q1 2021
New holders
86
229 more added
Sold out
67
172 more reduced

5 institutions that held it in Q1 2021 haven't filed for Q2 2021 yet. Not filing isn't selling, so they aren't counted as sold out or in the changes above.

Compare with Q1 2021: new holders, sold out and not filed yet

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 holdersQ2 2021: 607 institutions
Q1 2021: 593 institutionsQ2 2021: 607 institutionsQ3 2021: 594 institutionsQ4 2021: 633 institutionsQ1 2022: 589 institutionsQ2 2022: 591 institutionsQ3 2022: 634 institutionsQ4 2022: 704 institutionsQ1 2023: 692 institutionsQ2 2023: 714 institutionsQ3 2023: 690 institutionsQ4 2023: 737 institutionsQ1 2024: 767 institutionsQ2 2024: 767 institutionsQ3 2024: 773 institutionsQ4 2024: 805 institutionsQ1 2025: 858 institutionsQ2 2025: 873 institutionsQ3 2025: 905 institutionsQ4 2025: 847 institutionsQ1 2026: 797 institutionsQ2 2026: 760 institutions
Value heldQ2 2021: $31.1B
Q1 2021: $31.2BQ2 2021: $31.1BQ3 2021: $32.3BQ4 2021: $29.6BQ1 2022: $25.2BQ2 2022: $23.0BQ3 2022: $28.0BQ4 2022: $30.4BQ1 2023: $26.7BQ2 2023: $35.5BQ3 2023: $30.1BQ4 2023: $34.4BQ1 2024: $38.4BQ2 2024: $29.3BQ3 2024: $30.0BQ4 2024: $28.9BQ1 2025: $33.9BQ2 2025: $34.2BQ3 2025: $34.9BQ4 2025: $28.4BQ1 2026: $16.8BQ2 2026: $11.7B
Institutions holding CSGP and their total value by quarter
QuarterHoldersValue
Q2 2026760$11.7B
Q1 2026797$16.8B
Q4 2025847$28.4B
Q3 2025905$34.9B
Q2 2025873$34.2B
Q1 2025858$33.9B
Q4 2024805$28.9B
Q3 2024773$30.0B
Q2 2024767$29.3B
Q1 2024767$38.4B
Q4 2023737$34.4B
Q3 2023690$30.1B
Q2 2023714$35.5B
Q1 2023692$26.7B
Q4 2022704$30.4B
Q3 2022634$28.0B
Q2 2022591$23.0B
Q1 2022589$25.2B
Q4 2021633$29.6B
Q3 2021594$32.3B
Q2 2021607$31.1B
Q1 2021593$31.2B

Institutions, Q2 2021

Shares, value and share of portfolio for each institution holding Costar Group, Inc.; share changes are against Q1 2021.

Institutions holding CSGP in Q2 2021
InstitutionSharesValue% of portfolioChange in sharesAction
Westfield Capital Management Co LP74,850$6.20M0.04%−715,920−90.5%ReducedConverted for a 10-for-1 split
US Bancorp75,779$6.28M0.01%−4,091−5.1%ReducedConverted for a 10-for-1 split
State of Alaska, Department of Revenue77,065$6.38M0.06%−14,975−16.3%ReducedConverted for a 10-for-1 split
DnB Asset Management AS77,581$6.43M0.04%+77,581New
Tsai Capital Corp77,760$6.44M5.91%+2,570+3.4%AddedConverted for a 10-for-1 split
Gulf International Bank (UK) Ltd78,500$6.50M0.08%00.0%UnchangedConverted for a 10-for-1 split
Jupiter Asset Management Ltd78,840$6.53M0.07%−89,260−53.1%ReducedConverted for a 10-for-1 split
Employees Retirement System of Texas79,220$6.56M0.08%+30,000+61.0%AddedConverted for a 10-for-1 split
Nomura Asset Management Co Ltd80,170$6.64M0.04%−560−0.7%ReducedConverted for a 10-for-1 split
Forsta Ap-Fonden81,000$6.71M0.08%+11,000+15.7%AddedConverted for a 10-for-1 split
The PNC Financial Services Group, Inc.83,200$6.89M0.01%+6,330+8.2%AddedConverted for a 10-for-1 split
Stony Point Capital LLC84,503$7.00M1.83%−42,997−33.7%ReducedConverted for a 10-for-1 split
Old National Bancorp86,100$7.13M0.27%+7,660+9.8%AddedConverted for a 10-for-1 split
Ironvine Capital Partners, LLC87,252$7.23M0.79%+502+0.6%AddedConverted for a 10-for-1 split
Engineers Gate Manager LP87,941$7.28M0.47%+72,181+458.0%AddedConverted for a 10-for-1 split
Schonfeld Strategic Advisors LLC88,609$7.34M0.08%+76,599+637.8%AddedConverted for a 10-for-1 split
Natixis Advisors, L.P.91,944$7.62M0.04%+91,944New
Andra AP-fonden92,000$7.62M0.16%+32,000+53.3%AddedConverted for a 10-for-1 split
D. E. Shaw & Co., Inc.93,182$7.72M0.01%+93,182New
Twinbeech Capital LP96,037$7.95M0.96%+87,097+974.2%AddedConverted for a 10-for-1 split
Brown Advisory Inc96,360$7.98M0.01%+1,690+1.8%AddedConverted for a 10-for-1 split
Night Owl Capital Management, LLC98,920$8.19M1.62%−600−0.6%ReducedConverted for a 10-for-1 split
Sumitomo Mitsui DS Asset Management Company, Ltd100,220$8.30M0.20%−3,040−2.9%ReducedConverted for a 10-for-1 split
Quadrature Capital Ltd100,568$8.33M0.32%+100,568New
EULAV Asset Management103,040$8.53M0.23%00.0%UnchangedConverted for a 10-for-1 split
Mirae Asset Global Investments Co., Ltd.107,659$8.92M0.02%+2,679+2.6%AddedConverted for a 10-for-1 split
Select Equity Group, L.P.110,762$9.17M0.03%+110,762New
Arizona State Retirement System111,390$9.22M0.08%−2,260−2.0%ReducedConverted for a 10-for-1 split
2Xideas AG111,810$9.26M0.83%+15,720+16.4%AddedConverted for a 10-for-1 split
NN Investment Partners Holdings N.V.112,530$9.32M0.05%−11,480−9.3%ReducedConverted for a 10-for-1 split
Prudential Financial Inc112,899$9.35M0.01%−14,051−11.1%ReducedConverted for a 10-for-1 split
Storebrand Asset Management AS115,960$9.60M0.05%−3,510−2.9%ReducedConverted for a 10-for-1 split
First Republic Investment Management, Inc.117,002$9.69M0.03%+27,972+31.4%AddedConverted for a 10-for-1 split
Advisor Group Holdings, Inc.117,290$9.71M0.02%+3,080+2.7%AddedConverted for a 10-for-1 split
Shell Asset Management Co119,710$9.91M0.19%+66,280+124.1%AddedConverted for a 10-for-1 split
Congress Asset Management Co119,953$9.94M0.08%+1,543+1.3%AddedConverted for a 10-for-1 split
Fjarde Ap-Fonden /Fourth Swedish National Pension Fund120,370$9.97M0.09%−18,000−13.0%ReducedConverted for a 10-for-1 split
Toronto Dominion Bank123,026$10.2M0.02%−3,954−3.1%ReducedConverted for a 10-for-1 split
Gateway Investment Advisers LLC123,170$10.2M0.10%00.0%UnchangedConverted for a 10-for-1 split
ExodusPoint Capital Management, LP124,394$10.3M0.16%+91,284+275.7%AddedConverted for a 10-for-1 split
Aviva PLC125,927$10.4M0.05%−18,423−12.8%ReducedConverted for a 10-for-1 split
KBC Group NV126,140$10.4M0.04%+6,710+5.6%AddedConverted for a 10-for-1 split
Robeco Institutional Asset Management B.V.128,300$10.6M0.02%−1,290−1.0%ReducedConverted for a 10-for-1 split
Rice Hall James & Associates, LLC128,737$10.7M0.38%00.0%UnchangedConverted for a 10-for-1 split
Scout Investments, Inc.136,717$11.3M0.17%−143,003−51.1%ReducedConverted for a 10-for-1 split
Pictet Asset Management Ltd137,290$11.4M0.01%−4,220−3.0%ReducedConverted for a 10-for-1 split
Canada Pension Plan Investment Board142,640$11.8M0.01%+25,350+21.6%AddedConverted for a 10-for-1 split
Spire Wealth Management144,080$11.9M0.32%−34,220−19.2%ReducedConverted for a 10-for-1 split
Vantage Investment Partners, LLC144,470$12.0M0.57%00.0%UnchangedConverted for a 10-for-1 split
Treasurer of the State of North Carolina145,788$12.1M0.07%−3,242−2.2%ReducedConverted for a 10-for-1 split
Swedbank AB146,710$12.2M0.02%+10,410+7.6%AddedConverted for a 10-for-1 split
SG Americas Securities, LLC147,744$12.2M0.06%+141,544+2,283.0%AddedConverted for a 10-for-1 split
Paloma Partners Management Co151,360$12.5M0.33%+140,660+1,314.6%AddedConverted for a 10-for-1 split
Squarepoint Ops LLC151,992$12.6M0.09%+40,172+35.9%AddedConverted for a 10-for-1 split
CIBC World Markets Corp152,180$12.6M0.09%+152,180New
Lakehouse Capital Pty Ltd153,950$12.8M7.44%+153,950New
NS Partners Ltd159,005$13.2M0.69%+4,775+3.1%AddedConverted for a 10-for-1 split
Marsico Capital Management LLC162,170$13.4M0.33%00.0%UnchangedConverted for a 10-for-1 split
Badgley Phelps & Bell Inc162,770$13.5M0.50%+7,010+4.5%AddedConverted for a 10-for-1 split
Erste Asset Management GmbH165,310$13.7M0.27%+51,560+45.3%AddedConverted for a 10-for-1 split
Teachers Retirement System of the State of Kentucky165,350$13.7M0.13%00.0%UnchangedConverted for a 10-for-1 split
Spence Asset Management166,576$13.8M3.32%+2,476+1.5%AddedConverted for a 10-for-1 split
Archon Partners LLC171,100$14.2M1.77%00.0%UnchangedConverted for a 10-for-1 split
Picton Mahoney Asset Management182,180$15.1M0.55%−23,950−11.6%ReducedConverted for a 10-for-1 split
AE Wealth Management LLC185,111$15.3M0.13%+14,291+8.4%AddedConverted for a 10-for-1 split
State of Wisconsin Investment Board188,976$15.7M0.03%−6,304−3.2%ReducedConverted for a 10-for-1 split
BNP Paribas Arbitrage, SA192,115$15.9M0.03%+107,925+128.2%AddedConverted for a 10-for-1 split
Oppenheimer Asset Management Inc.195,437$16.2M0.23%+4,117+2.2%AddedConverted for a 10-for-1 split
Engle Capital Management, L.P.200,000$16.6M2.43%+200,000New
Cubist Systematic Strategies, LLC200,200$16.6M0.19%+137,230+217.9%AddedConverted for a 10-for-1 split
HSBC Holdings PLC201,964$16.8M0.02%+36,994+22.4%AddedConverted for a 10-for-1 split
Royal Bank of Canada207,955$17.2M0.00%+37,605+22.1%AddedConverted for a 10-for-1 split
Bank of Montreal209,292$17.5M0.01%−11,068−5.0%ReducedConverted for a 10-for-1 split
Alliancebernstein L.P.216,420$17.9M0.01%−25,360−10.5%ReducedConverted for a 10-for-1 split
Boston Private Wealth LLC218,920$18.1M0.23%+8,330+4.0%AddedConverted for a 10-for-1 split
Man Group plc224,346$18.6M0.07%+134,796+150.5%AddedConverted for a 10-for-1 split
Flossbach Von Storch AG224,420$18.6M0.06%+224,420New
Public Employees Retirement System of Ohio225,225$18.7M0.07%+14,605+6.9%AddedConverted for a 10-for-1 split
State of New Jersey Common Pension Fund D230,510$19.1M0.06%−7,350−3.1%ReducedConverted for a 10-for-1 split
Alyeska Investment Group, L.P.237,770$19.7M0.23%+24,720+11.6%AddedConverted for a 10-for-1 split
Ycg, LLC239,952$19.9M1.98%+80,552+50.5%AddedConverted for a 10-for-1 split
UBS Group AG243,846$20.2M0.01%−183,234−42.9%ReducedConverted for a 10-for-1 split
Mitsubishi UFJ Kokusai Asset Management Co., Ltd.249,840$20.7M0.11%00.0%UnchangedConverted for a 10-for-1 split
AQR Capital Management LLC262,930$21.8M0.04%−69,990−21.0%ReducedConverted for a 10-for-1 split
Thrivent Financial for Lutherans271,620$22.5M0.05%−17,890−6.2%ReducedConverted for a 10-for-1 split
HRT Financial LP274,739$22.8M0.21%+33,269+13.8%AddedConverted for a 10-for-1 split
Arrowstreet Capital, Limited Partnership274,940$22.8M0.03%−154,730−36.0%ReducedConverted for a 10-for-1 split
Ashford Capital Management Inc281,590$23.3M2.10%−2,440−0.9%ReducedConverted for a 10-for-1 split
American Assets Capital Advisers, LLC282,370$23.4M2.65%−48,300−14.6%ReducedConverted for a 10-for-1 split
Great West Life Assurance Co286,272$23.7M0.05%−38,988−12.0%ReducedConverted for a 10-for-1 split
Sandhill Capital Partners LLC291,702$24.2M1.88%+1,992+0.7%AddedConverted for a 10-for-1 split
TCW Group Inc296,980$24.6M0.21%+50,290+20.4%AddedConverted for a 10-for-1 split
Nissay Asset Management Corp301,680$25.0M0.22%−50,580−14.4%ReducedConverted for a 10-for-1 split
Russell Investments Group, Ltd.301,698$25.0M0.04%+20,208+7.2%AddedConverted for a 10-for-1 split
Jane Street Group, LLC302,602$25.1M0.06%−21,488−6.6%ReducedConverted for a 10-for-1 split
Asset Management One Co.,Ltd.304,094$25.2M0.09%−9,566−3.0%ReducedConverted for a 10-for-1 split
Royal London Asset Management Ltd311,530$25.8M0.11%−5,220−1.6%ReducedConverted for a 10-for-1 split
Susquehanna International Group, LLP315,781$26.2M0.03%−16,769−5.0%ReducedConverted for a 10-for-1 split
Qube Research & Technologies Ltd325,537$27.0M0.34%+215,837+196.8%AddedConverted for a 10-for-1 split
Deutsche Bank AG331,089$27.4M0.01%−126,791−27.7%ReducedConverted for a 10-for-1 split