COSTAR GROUP, INC. - Common Stock (CSGP) Institutional Ownership

13F Institutional Holders and Ownership History from Q1 2014 to Q4 2025

Type / Class
Equity / Common Stock
Symbol
CSGP on Nasdaq
Shares outstanding
424,270,120
Price per share
$61.93
All holders as of 31 Dec 2025
Q4 2025
Total 13F shares
411,594,819
Total reported value
$27,663,616,329
% of total 13F portfolios
0.02%
Share change
-3,557,575
Value change
-$292,944,049
Number of holders
831
Price from insider filings
$61.93
Reported Shares, Excluding Options vs Price
Reported Value, Excluding Options
Total Investors

Significant Owners of COSTAR GROUP, INC. - Common Stock (CSGP) based on Schedule 13D/G filings

Filer Ownership Change % Holdings Value Net Change Nb Shares Change % Reporting Name Report Period
BlackRock, Inc. 7.5% $2,631,535,419 31,820,259 BlackRock, Inc. 31 Mar 2025

As of 31 Dec 2025, 831 institutional investors reported holding 411,594,819 shares of COSTAR GROUP, INC. - Common Stock (CSGP). This represents 97% of the company’s total 424,270,120 outstanding shares.

Top 25 Institutional Shareholders

The largest institutional shareholders of COSTAR GROUP, INC. - Common Stock (CSGP) together control 66% of the company’s outstanding shares — a level of ownership often associated with strong institutional conviction and long‑term capital commitment.

Institution Ownership % Shares Held Share Change % Portfolio % Holdings Value
VANGUARD GROUP INC 17% 70,108,999 +0.08% 0.07% $4,714,129,093
BlackRock, Inc. 8% 33,970,626 -6% 0.04% $2,284,184,864
BAMCO INC /NY/ 4.6% 19,498,099 +1.3% 3.6% $1,311,052,177
STATE STREET CORP 4.4% 18,632,352 +1.9% 0.04% $1,252,839,348
PRINCIPAL FINANCIAL GROUP INC 4.1% 17,566,074 -5.7% 0.6% $1,181,146,072
BAILLIE GIFFORD & CO 3% 12,933,185 +57% 0.72% $869,627,359
GEODE CAPITAL MANAGEMENT, LLC 2.9% 12,182,167 -3.3% 0.05% $816,237,290
Capital International Investors 2.6% 10,842,010 +60% 0.11% $729,019,965
AKRE CAPITAL MANAGEMENT LLC 2.3% 9,617,805 +3.3% 7.1% $646,701,208
JANUS HENDERSON GROUP PLC 1.8% 7,473,380 +20% 0.23% $502,487,485
NORGES BANK 1.7% 7,090,495 0.05% $476,764,884
Capital Research Global Investors 1.3% 5,566,962 +11% 0.07% $374,328,936
Invesco Ltd. 1.3% 5,387,056 +19% 0.06% $362,225,646
MORGAN STANLEY 1.2% 5,291,136 -38% 0.02% $355,776,152
POLEN CAPITAL MANAGEMENT LLC 1.2% 4,890,936 -23% 1.4% $328,866,546
Vulcan Value Partners, LLC 1.1% 4,485,021 +17% 5.5% $301,527,000
MIZUHO MARKETS AMERICAS LLC 1% 4,416,116 -14% 6.4% $296,939,640
Amundi 0.97% 4,114,516 +31% 0.09% $276,660,055
Bank of New York Mellon Corp 0.97% 4,113,002 -5.7% 0.05% $276,558,187
NOMURA ASSET MANAGEMENT INTERNATIONAL INC. 0.92% 3,909,161 0% 0.4% $262,852,000
GOLDMAN SACHS GROUP INC 0.88% 3,751,312 +71% 0.04% $252,238,230
Nuveen, LLC 0.84% 3,560,896 +1.5% 0.06% $239,434,647
BANK OF AMERICA CORP /DE/ 0.83% 3,504,812 -5.2% 0.02% $235,663,552
NORTHERN TRUST CORP 0.82% 3,466,062 -7.6% 0.03% $233,058,008
T. Rowe Price Investment Management, Inc. 0.82% 3,464,794 -1.3% 0.15% $232,973,000

Institutional Holders of COSTAR GROUP, INC. - Common Stock (CSGP) across Reporting Periods

Period Reported Shares, Excl. Options Value, Excl. Options Value Change Price (Median) Investors
2025 Q4 411,594,819 $27,663,616,329 -$292,944,049 $67.24 831
2025 Q3 413,426,235 $34,855,153,600 -$902,869,837 $84.37 894
2025 Q2 424,703,791 $34,159,019,628 +$171,132,190 $80.40 862
2025 Q1 423,446,348 $33,523,790,279 +$1,607,628,234 $79.23 849
2024 Q4 403,038,641 $28,852,435,346 +$370,626,438 $71.59 792
2024 Q3 397,246,146 $29,969,181,073 +$120,726,429 $75.44 760
2024 Q2 394,901,262 $29,273,363,324 -$291,836,744 $74.14 748
2024 Q1 396,743,013 $38,303,855,847 +$428,598,484 $96.60 755
2023 Q4 393,483,055 $34,375,409,230 +$143,130,803 $87.39 730
2023 Q3 391,788,209 $30,120,902,945 -$590,586,683 $76.89 680
2023 Q2 397,474,758 $35,363,122,789 +$989,211,981 $89.00 704
2023 Q1 388,559,886 $26,741,702,121 -$376,407,464 $68.85 681
2022 Q4 392,580,944 $30,340,252,937 -$724,471,352 $77.28 694
2022 Q3 401,886,577 $27,995,359,544 +$1,018,881,581 $69.65 619
2022 Q2 380,103,098 $22,960,291,091 +$139,282,945 $60.41 570
2022 Q1 378,297,654 $25,170,499,125 +$109,334,737 $66.61 571
2021 Q4 374,835,876 $29,611,659,956 -$73,412,177 $79.03 614
2021 Q3 375,161,636 $32,269,957,641 -$34,760,974 $86.06 587
2021 Q2 375,105,287 $31,053,499,414 +$27,703,708,016 $82.82 594
2021 Q1 37,937,694 $31,162,910,100 +$177,339,216 $821.89 577
2020 Q4 37,666,252 $34,793,341,330 -$174,310,813 $924.28 609
2020 Q3 37,840,096 $32,096,827,188 +$152,748,862 $848.51 569
2020 Q2 37,755,916 $26,814,722,649 +$1,880,573,285 $710.67 531
2020 Q1 35,124,109 $20,625,948,296 +$78,017,926 $587.21 493
2019 Q4 34,887,669 $20,871,701,673 +$162,572,354 $598.30 483
2019 Q3 34,625,145 $20,534,437,608 -$309,418,698 $593.20 478
2019 Q2 35,092,487 $19,429,213,866 +$95,073,440 $554.06 439
2019 Q1 35,440,815 $16,526,927,390 +$92,404,619 $466.42 430
2018 Q4 35,247,092 $11,887,308,822 +$13,188,600 $337.34 377
2018 Q3 35,145,115 $14,789,748,496 -$83,958,817 $420.84 402
2018 Q2 35,347,408 $14,585,049,143 -$78,222,302 $412.63 376
2018 Q1 35,556,148 $12,894,936,556 +$38,902,943 $362.68 355
2017 Q4 35,553,087 $10,556,304,923 -$150,769,950 $296.95 337
2017 Q3 36,114,148 $9,686,049,694 +$936,329,738 $268.25 333
2017 Q2 32,609,721 $8,595,866,765 +$543,170,527 $263.60 296
2017 Q1 32,990,544 $6,835,782,488 +$240,918,276 $207.22 283
2016 Q4 33,323,463 $6,282,123,160 +$58,008,591 $188.49 288
2016 Q3 33,085,002 $7,161,342,232 -$149,516,946 $216.53 238
2016 Q2 33,670,668 $7,362,191,776 -$101,209,888 $218.66 247
2016 Q1 34,237,430 $6,439,519,077 +$89,330,867 $188.17 225
2015 Q4 33,774,059 $6,981,086,116 +$4,799,371 $206.69 217
2015 Q3 33,842,907 $5,856,788,480 -$34,726,181 $173.06 221
2015 Q2 33,108,869 $6,663,510,644 -$168,762,739 $201.26 214
2015 Q1 33,782,554 $6,682,194,023 +$72,190,149 $197.83 212
2014 Q4 33,703,923 $6,189,337,643 +$73,294,135 $183.63 210
2014 Q3 33,225,437 $5,168,157,522 +$207,752,740 $155.54 205
2014 Q2 31,913,694 $5,045,424,648 +$611,554,696 $158.17 233
2014 Q1 27,940,865 $5,214,663,264 +$113,713,900 $186.74 234