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
$67.24
All holders as of 30 Sep 2025
Q3 2025
Total 13F shares
413,220,989
Total reported value
$34,842,432,904
% of total 13F portfolios
0.03%
Share change
-11,123,540
Value change
-$909,965,225
Number of holders
885
Price from insider filings
$67.24
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 30 Sep 2025, 885 institutional investors reported holding 413,220,989 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 65% 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% 70,056,441 +1.8% 0.09% $5,910,661,927
BlackRock, Inc. 8.5% 36,133,158 +3.1% 0.05% $3,048,554,548
BAMCO INC /NY/ 4.5% 19,255,566 -2.2% 4.3% $1,624,592,103
PRINCIPAL FINANCIAL GROUP INC 4.4% 18,623,370 -0.12% 0.79% $1,571,258,065
STATE STREET CORP 4.3% 18,284,128 +3.1% 0.05% $1,542,631,879
GEODE CAPITAL MANAGEMENT, LLC 3% 12,601,455 +2% 0.07% $1,059,385,861
AKRE CAPITAL MANAGEMENT LLC 2.2% 9,306,485 -0.03% 7.8% $785,188,139
MORGAN STANLEY 2% 8,543,024 +15% 0.04% $720,775,058
BAILLIE GIFFORD & CO 1.9% 8,241,642 -3.5% 0.52% $695,347,335
MASSACHUSETTS FINANCIAL SERVICES CO /MA/ 1.7% 7,406,788 +12% 0.19% $624,910,703
Capital International Investors 1.6% 6,788,554 -54% 0.09% $572,749,424
POLEN CAPITAL MANAGEMENT LLC 1.5% 6,380,909 -7.8% 1.7% $538,357,326
JANUS HENDERSON GROUP PLC 1.5% 6,216,807 +54% 0.24% $524,510,723
MIZUHO MARKETS AMERICAS LLC 1.2% 5,123,216 -13% 9.1% $432,245,734
Capital Research Global Investors 1.2% 4,993,854 +27% 0.08% $421,329,696
UBS Group AG 1.1% 4,607,937 -2.1% 0.08% $388,771,644
Invesco Ltd. 1.1% 4,537,343 +2.2% 0.06% $382,815,628
Bank of New York Mellon Corp 1% 4,363,371 -9.9% 0.07% $368,137,633
MACQUARIE GROUP LTD 1% 4,267,156 -12% 0.42% $360,020,405
Vulcan Value Partners, LLC 0.9% 3,831,609 +3.1% 5.9% $323,203,808
NORTHERN TRUST CORP 0.88% 3,752,394 -2.9% 0.04% $316,589,483
FRANKLIN RESOURCES INC 0.88% 3,736,949 +8.6% 0.08% $315,286,389
BANK OF AMERICA CORP /DE/ 0.87% 3,696,857 -28% 0.02% $311,903,825
T. Rowe Price Investment Management, Inc. 0.83% 3,510,524 -46% 0.18% $296,183,000
Nuveen, LLC 0.83% 3,506,625 +224% 0.08% $295,853,952

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 2,185,237 $146,927,042 -$5,349,314 $67.24 40
2025 Q3 413,220,989 $34,842,432,904 -$909,965,225 $84.37 885
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