Latest Period
Q1 2026
Security Snapshot
COSTAR GROUP, INC. - Common Stock (CSGP) Institutional Ownership
CUSIP: 22160N109
13F Institutional Holders and Ownership History from Q1 2014 to Q1 2026
Institutions Reporting
783
Shares (Excl. Options)
406,272,687
Price
$40.34
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- Security type / class
- Equity / Common Stock
- Symbol
- CSGP on Nasdaq
- All holders as of 31 Mar 2026
- Q1 2026
- Total 13F shares
- 406,272,687
- Total 13F value
- $16,385,314,532
- Portfolio coverage rank
- 0.01%
- Share change
- -4,534,885
- Value change
- -$1,038,621,046
- Number of holders
- 783
- Shares outstanding
- 419,840,598
- SEC-reported price per share
- $31.97
- Insider filing price
- $31.97
Latest holder snapshot
5 signals
Issuer context
Names, identifiers, and filing context for this profile.
3 identity fields
13F Shares, Excluding Options vs Price
13F Value, Excluding Options
Total Investors
Key facts
- CSGP - COSTAR GROUP, INC. - Common Stock is tracked under CUSIP 22160N109.
- 783 institutions reported positions in Q1 2026.
- 3 significant owners is listed from Schedule 13D/13G reporting.
Change
- Holder count moved from 844 to 783 between Q4 2025 and Q1 2026.
- SEC-reported value moved from $27,751,646,292 to $16,385,314,532.
Research use
- You can quickly see who holds this security, then open quarter and manager detail pages for full evidence.
- 13F and Schedule 13D/13G sections are kept together so you can cross-check institutional and beneficial ownership context.
Evidence
Source: SEC Form 13F
Open SEC evidence
Latest holder context comes from 783 institutions filings for Q1 2026.
Security key
22160N109
Latest holder period
Q1 2026
13F holders
783
13D/G owners
3
CIK / CUSIP context first
Open Q1 2026 holders
CSGP full holder history
COSTAR GROUP, INC. SEC filings
COSTAR GROUP, INC. company facts
COSTAR GROUP, INC. insider transactions
Broader feeds
Recent Quarterly Holder Reports
Open recent reporting periods for CUSIP 22160N109:
13D/G owners
Significant owners
Large-stake holder rows connected to Schedule 13D/G evidence.
Rows
3
Security
CSGP
| Filer | Ownership | Change % | Holdings Value | Net Change | Nb Shares | Change % | Reporting Name | Report Period |
|---|---|---|---|---|---|---|---|---|
| VANGUARD PORTFOLIO MANAGEMENT LLC | 9.1% | $1,544,700,692 | 38,292,035 | Vanguard Portfolio Management | 31 Mar 2026 | |||
| BlackRock, Inc. | 7.5% | $2,631,535,419 | 31,820,259 | BlackRock, Inc. | 31 Mar 2025 | |||
| VANGUARD CAPITAL MANAGEMENT LLC | 7.5% | $1,275,308,639 | 31,613,997 | Vanguard Capital Management | 31 Mar 2026 |
As of 31 Mar 2026, 783 institutional investors reported holding 406,272,687 shares of COSTAR GROUP, INC. - Common Stock (CSGP). This represents 97% of the company’s total 419,840,598 outstanding shares.
13F concentration
Top 25 institutional shareholders
Largest 13F positions for this security by reported shares and value.
Top holder share
67%
| Institution | Ownership % | Shares Held | Share Change % | Portfolio % | Holdings Value |
|---|---|---|---|---|---|
| VANGUARD PORTFOLIO MANAGEMENT LLC | 9.1% | 38,234,133 | 0% | 0.08% | $1,542,364,925 |
| BlackRock, Inc. | 8.1% | 33,808,184 | -0.48% | 0.02% | $1,363,822,157 |
| VANGUARD CAPITAL MANAGEMENT LLC | 6.5% | 27,423,903 | 0% | 0.03% | $1,106,280,247 |
| STATE STREET CORP | 4.4% | 18,650,975 | +0.1% | 0.03% | $752,380,332 |
| PRINCIPAL FINANCIAL GROUP INC | 4.2% | 17,696,192 | +0.74% | 0.38% | $713,866,036 |
| BAMCO INC /NY/ | 3.9% | 16,314,175 | -16% | 2% | $658,113,819 |
| Capital International Investors | 3.7% | 15,513,753 | +43% | 0.15% | $625,824,796 |
| BAILLIE GIFFORD & CO | 3.2% | 13,610,922 | +5.2% | 0.56% | $549,064,593 |
| POLEN CAPITAL MANAGEMENT LLC | 3% | 12,570,368 | +157% | 3.5% | $507,088,654 |
| GEODE CAPITAL MANAGEMENT, LLC | 3% | 12,448,652 | +2.2% | 0.03% | $500,449,270 |
| AKRE CAPITAL MANAGEMENT LLC | 2.5% | 10,348,273 | +7.6% | 6.8% | $417,449,333 |
| GOLDMAN SACHS GROUP INC | 2.2% | 9,245,812 | +146% | 0.05% | $372,976,077 |
| JANUS HENDERSON GROUP PLC | 1.8% | 7,724,152 | +3.4% | 0.15% | $311,585,948 |
| Invesco Ltd. | 1.7% | 7,137,002 | +32% | 0.04% | $287,906,660 |
| D. E. Shaw & Co., Inc. | 1.4% | 5,909,623 | +553% | 0.19% | $238,394,192 |
| MORGAN STANLEY | 1.3% | 5,412,615 | +2.3% | 0.01% | $218,344,980 |
| Capital Research Global Investors | 1% | 4,373,706 | -21% | 0.03% | $176,443,832 |
| BANK OF AMERICA CORP /DE/ | 0.85% | 3,568,107 | +1.8% | 0.01% | $143,937,416 |
| VAN ECK ASSOCIATES CORP | 0.83% | 3,478,726 | +6054% | 0.11% | $140,332,000 |
| NORTHERN TRUST CORP | 0.82% | 3,432,231 | -0.98% | 0.02% | $138,456,198 |
| Meritage Group LP | 0.79% | 3,329,006 | 5.1% | $134,292,102 | |
| Amundi | 0.78% | 3,280,724 | -20% | 0.04% | $132,344,407 |
| Legal & General Group Plc | 0.72% | 3,025,508 | +5.7% | 0.03% | $122,048,995 |
| BECK MACK & OLIVER LLC | 0.7% | 2,926,975 | +32% | 2.4% | $118,074,172 |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC | 0.68% | 2,874,262 | +7.9% | 0.02% | $115,947,729 |
Quarter history
Institutional holders across reporting periods
Holder count, reported shares/value, and median price by quarter.
Periods
49
Latest
Q1 2026
Rows shown
1-25 of 49
| Period | 13F Shares, Excl. Options | Value, Excl. Options | Value Change | Price (Median) | Investors |
|---|---|---|---|---|---|
| 2026 Q1 | 406,272,687 | $16,385,314,532 | -$1,038,621,046 | $40.34 | 783 |
| 2025 Q4 | 412,841,251 | $27,751,646,292 | -$266,033,325 | $67.24 | 844 |
| 2025 Q3 | 413,426,079 | $34,855,140,439 | -$902,889,242 | $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 |