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
413,314,826
Total reported value
$34,850,349,387
% of total 13F portfolios
0.03%
Share change
-11,122,651
Value change
-$909,890,438
Number of holders
886
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% $2,462,569,844 31,820,259 BlackRock, Inc. 31 Mar 2025

As of 30 Sep 2025, 886 institutional investors reported holding 413,314,826 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 7,630,562 $511,310,065 -$314,591,005 $67.24 111
2025 Q3 413,314,826 $34,850,349,387 -$909,890,438 $84.37 886
2025 Q2 424,703,791 $34,159,019,628 +$171,132,293 $80.40 862
2025 Q1 423,215,297 $33,505,484,401 +$1,606,777,968 $79.23 845
2024 Q4 402,921,947 $28,844,102,932 +$735,456,470 $71.59 784
2024 Q3 391,976,523 $29,571,655,170 -$303,526,820 $75.44 756
2024 Q2 395,228,647 $29,297,829,921 +$76,304,354 $74.14 745
2024 Q1 392,172,292 $37,862,502,761 -$80,823,213 $96.60 751
2023 Q4 790,764 $69,105,880 -$5,500,193 $87.39 15
2023 Q3 381,290,104 $29,313,703,526 -$655,173,126 $76.89 664
2023 Q2 392,615,260 $34,930,627,950 +$677,058,054 $89.00 691
2023 Q1 381,530,488 $26,257,726,725 -$493,380,994 $68.85 666
2022 Q4 387,785,777 $29,969,686,106 -$684,889,005 $77.28 681
2022 Q3 401,234,450 $27,949,939,449 +$1,019,763,543 $69.65 609
2022 Q2 379,724,660 $22,930,273,141 +$278,187,942 $60.41 565
2022 Q1 377,782,177 $25,136,164,458 +$169,812,845 $66.61 564
2021 Q4 373,007,669 $29,466,818,926 -$89,201,838 $79.03 605
2021 Q3 373,281,317 $32,108,135,233 +$15,013,864 $86.06 575
2021 Q2 372,800,233 $30,862,431,829 +$27,414,874,003 $82.82 592
2021 Q1 37,906,782 $31,137,413,215 +$169,595,824 $821.89 581
2020 Q4 37,645,885 $34,774,511,360 -$187,777,124 $924.28 602
2020 Q3 37,830,983 $32,089,094,387 +$160,466,195 $848.51 566
2020 Q2 37,243,013 $26,450,244,128 +$1,867,645,140 $710.67 524
2020 Q1 34,321,138 $20,154,428,674 -$163,297,778 $587.21 486
2019 Q4 34,875,734 $20,864,573,858 +$162,384,885 $598.30 478
2019 Q3 34,615,474 $20,528,700,770 -$310,058,561 $593.20 475
2019 Q2 35,019,472 $19,388,762,031 +$364,869,305 $554.06 434
2019 Q1 35,426,261 $16,520,138,350 +$73,609,224 $466.42 428
2018 Q4 35,196,649 $11,870,303,856 +$32,148,733 $337.34 374
2018 Q3 35,144,913 $14,789,666,524 -$79,427,324 $420.84 399
2018 Q2 35,327,142 $14,576,688,112 +$37,010,261 $412.63 373
2018 Q1 35,415,360 $12,843,875,513 +$38,116,852 $362.68 351
2017 Q4 35,550,235 $10,555,304,923 -$134,098,013 $296.95 335
2017 Q3 36,111,736 $9,673,015,034 +$923,748,277 $268.25 331
2017 Q2 32,286,398 $8,510,640,765 +$557,060,665 $263.60 293
2017 Q1 32,987,461 $6,835,098,488 +$240,458,973 $207.22 281
2016 Q4 33,323,399 $6,282,112,160 +$22,802,212 $188.49 287
2016 Q3 31,983,049 $6,922,738,232 -$101,709,136 $216.53 235
2016 Q2 31,923,192 $6,980,090,304 -$84,653,367 $218.66 241
2016 Q1 32,859,714 $6,180,274,077 +$83,466,629 $188.17 222
2015 Q4 33,774,056 $6,981,085,116 +$4,860,571 $206.69 216
2015 Q3 33,842,528 $5,856,723,480 -$60,477,777 $173.06 219
2015 Q2 32,929,670 $6,627,447,644 -$57,270,984 $201.26 212
2015 Q1 33,782,554 $6,682,194,023 +$72,171,918 $197.83 212
2014 Q4 33,703,923 $6,189,337,643 +$79,918,082 $183.63 210
2014 Q3 33,225,437 $5,168,157,522 +$217,050,724 $155.54 206
2014 Q2 31,864,847 $5,037,698,648 +$625,209,233 $158.17 233
2014 Q1 27,940,865 $5,214,663,264 +$115,432,720 $186.74 234