CSGPNasdaqServices-Business Services, NECFiscal year ends December 31
COSTAR GROUP, INC.
Financials through Q2 FY2026, quarter ended Jun 30, 2026Last filing: 10-Q on Jul 29, 2026
$31.81−0.50 (-1.55%)
Close on Oct 19, 2026
- Market cap
- $12.86B
- P/E (TTM)
- 167.4
- Dividend yield
- –
Ownership
Institutional holdings as of Jun 30, 2026, from 13F filings
Held by institutions
100.0%
414M of 405M shares
Institutional holders
757
113 new, 142 sold out
Net institutional buying
6M
In Q2 2026
Insider trades, 12 months
7 buys · 4 sales
Net bought $7.95M
Shares held by institutions
Holders of more than 5%
Latest Schedule 13D (active) or 13G (passive) filed by each holder
| Holder | Shares | % of class | Filing | As of |
|---|---|---|---|---|
| Vanguard Portfolio Management | 38,292,035 | 9.12% | 13G (passive) | Mar 31, 2026 |
| BlackRock, Inc. | 31,820,259 | 7.50% | 13G (passive) amendment | Mar 31, 2025 |
| Vanguard Capital Management | 31,613,997 | 7.53% | 13G (passive) | Mar 31, 2026 |
| Ronald Baron | 21,626,763 | 5.30% | 13G (passive) | Jun 30, 2026 |
Top institutional holders
13F holdings as of Jun 30, 2026
| Holder | Shares | % of CSGP | Value | Change | % of portfolio |
|---|---|---|---|---|---|
| Vanguard Portfolio Management LLC | 37,914,844 | 9.36% | $1.07B | −319,289 | 0.05% |
| BlackRock, Inc. | 33,813,969 | 8.35% | $957.61M | +5,785 | 0.01% |
| Vanguard Capital Management LLC | 26,683,792 | 6.59% | $755.68M | −740,111 | 0.02% |
| Bamco Inc /Ny/ | 21,626,763 | 5.34% | $612.47M | +5,312,588 | 0.92% |
| State Street Corp | 18,410,876 | 4.54% | $521.40M | −240,099 | 0.02% |
| Capital International Investors | 16,643,016 | 4.11% | $471.33M | +1,129,263 | 0.10% |
| Baillie Gifford & Co | 13,154,165 | 3.25% | $372.53M | −456,757 | 0.34% |
| Geode Capital Management, LLC | 12,166,469 | 3.00% | $343.30M | −282,183 | 0.02% |
| Akre Capital Management LLC | 11,699,396 | 2.89% | $331.33M | +1,351,123 | 6.47% |
| Polen Capital Management LLC | 8,759,314 | 2.16% | $248.06M | −3,811,054 | 2.14% |
| Aqr Capital Management LLC | 8,445,474 | 2.08% | $239.18M | +7,182,770 | 0.08% |
| Jupiter Topco LLC | 7,832,860 | 1.93% | $221.83M | New | 0.09% |
| Invesco Ltd. | 6,808,377 | 1.68% | $192.81M | −9,139,148 | 0.02% |
| EdgePoint Investment Group Inc. | 5,950,002 | 1.47% | $168.50M | New | 1.27% |
| Norges Bank | 5,949,912 | 1.47% | $168.50M | New | 0.02% |
| Morgan Stanley | 5,485,870 | 1.35% | $155.36M | +73,255 | 0.01% |
| Meritage Group LP | 5,394,164 | 1.33% | $152.76M | +2,065,158 | 5.89% |
| Goldman Sachs Group Inc | 5,129,484 | 1.27% | $145.27M | −4,116,328 | 0.01% |
| JPMorgan Chase & Co | 4,939,994 | 1.22% | $145.37M | +3,090,449 | 0.01% |
| Federated Hermes, Inc. | 4,426,727 | 1.09% | $125.36M | +3,128,769 | 0.18% |
Institutional buying and selling by quarter
Positions opened, added to, reduced and closed by 13F filers
| Quarter | Holders | Shares held | % of shares | New / added | Reduced / closed | Shares bought | Shares sold |
|---|---|---|---|---|---|---|---|
| Q2 2026 | 757 | 414M | 100.0% | 113 / 303 | 264 / 142 | 78M | 73M |
| Q1 2026 | 797 | 416M | 100.0% | 130 / 307 | 277 / 166 | 135M | 72M |
| Q4 2025 | 847 | 426M | 100.0% | 103 / 274 | 387 / 143 | 60M | 47M |
| Q3 2025 | 905 | 416M | 100.0% | 108 / 365 | 313 / 63 | 25M | 35M |
| Q2 2025 | 873 | 426M | 100.0% | 101 / 355 | 316 / 75 | 24M | 28M |
| Q1 2025 | 857 | 430M | 100.0% | 140 / 377 | 264 / 75 | 46M | 25M |
| Q4 2024 | 805 | 410M | 100.0% | 144 / 295 | 278 / 96 | 51M | 39M |
| Q3 2024 | 772 | 400M | 98.7% | 91 / 308 | 284 / 78 | 66M | 24M |
| Q2 2024 | 766 | 397M | 97.9% | 99 / 277 | 284 / 92 | 20M | 38M |
| Q1 2024 | 766 | 416M | 100.0% | 91 / 300 | 266 / 55 | 35M | 15M |
| Q4 2023 | 736 | 398M | 98.1% | 105 / 282 | 262 / 50 | 23M | 18M |
| Q3 2023 | 689 | 392M | 96.8% | 65 / 276 | 252 / 85 | 14M | 21M |
Top mutual fund and ETF holders
Latest monthly portfolio reports (Form N-PORT)
| Fund | Shares | % of CSGP | Value | % of fund | As of |
|---|---|---|---|---|---|
| Vanguard Real Estate Index Fund | 15,894,241 | 3.92% | $457.12M | 0.63% | Jul 31, 2026 |
| Baron Partners Fund | 15,703,171 | 3.88% | $444.71M | 2.46% | Jun 30, 2026 |
| Vanguard Total Stock Market Index Fund | 12,965,607 | 3.20% | $367.19M | 0.02% | Jun 30, 2026 |
| Vanguard 500 Index Fund | 10,575,691 | 2.61% | $299.50M | 0.02% | Jun 30, 2026 |
| Akre Focus ETF | 8,491,693 | 2.10% | $244.22M | 4.65% | Jul 31, 2026 |
| iShares Core S&P 500 ETF | 5,616,586 | 1.39% | $159.06M | 0.02% | Jun 30, 2026 |
| Vanguard U.S. Growth Fund | 5,541,323 | 1.37% | $178.43M | 0.38% | May 31, 2026 |
| Janus Henderson Enterprise Fund | 5,532,268 | 1.37% | $156.67M | 0.70% | Jun 30, 2026 |
| American Funds Fundamental Investors | 5,469,000 | 1.35% | $154.88M | 0.09% | Jun 30, 2026 |
| Invesco S&P 500 Equal Weight ETF | 5,443,191 | 1.34% | $156.55M | 0.16% | Jul 31, 2026 |
| Fidelity 500 Index Fund | 5,423,688 | 1.34% | $174.64M | 0.02% | May 31, 2026 |
| Growth Fund of America | 4,823,033 | 1.19% | $155.30M | 0.04% | May 31, 2026 |
| Vanguard Small-Cap Index Fund | 4,683,646 | 1.16% | $132.64M | 0.07% | Jun 30, 2026 |
| Vanguard Mid-Cap Index Fund | 4,424,985 | 1.09% | $125.32M | 0.06% | Jun 30, 2026 |
| Vanguard Growth Index Fund | 4,310,388 | 1.06% | $122.07M | 0.03% | Jun 30, 2026 |
Officers, directors and major owners
People who filed Forms 3, 4 or 5 in the last two years
| Name | Role | Shares owned | % of shares | Latest filing |
|---|---|---|---|---|
| Andrew C. Florance | Founder and CEO, Director | 1,806,165 | 0.45% | Aug 5, 2026 |
| Cynthia Cammett Cann | Chief Accounting Officer | 18,822 | 0.00% | Aug 10, 2026 |
| Frederick G. Saint | President, Marketplaces | 278,415 | 0.07% | Aug 4, 2026 |
| Robin Jack Rossmann | Chief Financial Officer | 86,691 | 0.02% | Aug 4, 2026 |
| Christian M. Lown | Chief Financial Officer | 129,653 | 0.03% | Jul 6, 2026 |
| Michael J. Desmarais | Chief Human Resources Officer | 87,725 | 0.02% | Mar 17, 2026 |
| Frank Simuro | Chief Technology Officer | 414,491 | 0.10% | Mar 17, 2026 |
| Lisa Ruggles | Senior VP, Global Operations | 174,915 | 0.04% | Mar 17, 2026 |
| Gene Boxer | General Counsel and Secretary | 95,517 | 0.02% | Mar 17, 2026 |
| John W. Hill | Director | 22,993 | 0.01% | Aug 10, 2026 |
| Rachel C. Glaser | Director | 12,419 | 0.00% | Jun 24, 2026 |
| Louise S. Sams | Director | 28,671 | 0.01% | Jun 24, 2026 |
| Christine M. McCarthy | Director | 11,585 | 0.00% | Jun 24, 2026 |
| John L. Berisford | Director | 11,235 | 0.00% | Jun 24, 2026 |
| Robert W. Musslewhite | Director | 26,539 | 0.01% | Jun 24, 2026 |
| Angelique G. Brunner | Director | 18,428 | 0.00% | Jun 24, 2026 |
| Nana Banerjee | Director | – | – | Mar 17, 2026 |
| Michael R. Klein | Director | 1,863,088 | 0.46% | Dec 12, 2024 |
| Christopher J. Nassetta | Director | 275,715 | 0.07% | Dec 2, 2024 |
Insider trades
Common stock transactions reported on Form 4, newest first
| Insider | Date | Transaction | Shares | Price | Value | Shares after |
|---|---|---|---|---|---|---|
| Cynthia Cammett Cann Chief Accounting Officer | Aug 7, 2026 | Sale | −4,788 | $30.78 | $147.37K | 18,822 |
| John W. Hill Director | Aug 5, 2026 | Sale | −3,500 | $30.21 | $105.74K | 22,993 |
| Andrew C. Florance Founder and CEO, Director | Aug 4, 2026 | Buy | +83,300 | $29.89 | $2.49M | 1,806,165 |
| Cynthia Cammett Cann Chief Accounting Officer | Aug 1, 2026 | Tax withholding | −1,077 | $28.76 | $30.97K | 23,610 |
| Frederick G. Saint President, Marketplaces | Aug 1, 2026 | Tax withholding | −1,436 | $28.76 | $41.30K | 278,415 |
| Christian M. Lown Chief Financial Officer | Jul 1, 2026 | Tax withholding | −5,597 | $29.36 | $164.33K | 129,653 |
| John W. Hill Director | Jun 23, 2026 | Award | +8,262 | – | – | 26,493 |
| John L. Berisford Director | Jun 23, 2026 | Award | +8,262 | – | – | 11,235 |
| Christine M. McCarthy Director | Jun 23, 2026 | Award | +8,262 | – | – | 11,585 |
| Angelique G. Brunner Director | Jun 23, 2026 | Award | +8,262 | – | – | 18,428 |
| Robert W. Musslewhite Director | Jun 23, 2026 | Award | +8,262 | – | – | 26,539 |
| Louise S. Sams Director | Jun 23, 2026 | Award | +8,262 | – | – | 28,671 |
| Rachel C. Glaser Director | Jun 23, 2026 | Award | +8,262 | – | – | 12,419 |
| Cynthia Cammett Cann Chief Accounting Officer | Jun 15, 2026 | Tax withholding | −461 | $32.04 | $14.77K | 24,687 |
| Andrew C. Florance President and CEO, Director | May 1, 2026 | Buy | +3,100 | $35.82 | $111.04K | 1,722,865 |
| Andrew C. Florance President and CEO, Director | May 1, 2026 | Buy | +68,330 | $35.17 | $2.40M | 1,719,765 |
| Frank Simuro Chief Technology Officer | Mar 15, 2026 | Tax withholding | −11,107 | $43.63 | $484.60K | 414,491 |
| Michael J. Desmarais Chief Human Resources Officer | Mar 15, 2026 | Tax withholding | −2,873 | $43.63 | $125.35K | 87,725 |
| Gene Boxer General Counsel and Secretary | Mar 15, 2026 | Tax withholding | −428 | $43.63 | $18.67K | 95,517 |
| Lisa Ruggles Senior VP, Global Operations | Mar 15, 2026 | Tax withholding | −2,977 | $43.63 | $129.89K | 174,915 |
| Gene Boxer General Counsel and Secretary | Mar 15, 2026 | Tax withholding | −482 | $43.63 | $21.03K | 95,463 |
| Cynthia Cammett Cann Chief Accounting Officer | Mar 15, 2026 | Tax withholding | −1,194 | $43.63 | $52.09K | 25,148 |
| Cynthia Cammett Cann Chief Accounting Officer | Mar 10, 2026 | Award | +4,374 | – | – | 26,342 |
| Gene Boxer General Counsel and Secretary | Mar 10, 2026 | Award | +21,920 | – | – | 95,945 |
| Andrew C. Florance President and CEO, Director | Mar 10, 2026 | Award | +124,162 | – | – | 1,651,435 |
| Christian M. Lown Chief Financial Officer | Mar 10, 2026 | Award | +12,268 | – | – | 135,250 |
| Michael J. Desmarais Chief Human Resources Officer | Mar 10, 2026 | Award | +17,676 | – | – | 90,598 |
| Louise S. Sams Director | Mar 6, 2026 | Buy | +1,000 | $48.36 | $48.36K | 20,409 |
| Rachel C. Glaser Director | Mar 2, 2026 | Buy | +1,000 | $44.94 | $44.94K | 4,157 |
| Frederick G. Saint President, Marketplaces | Mar 2, 2026 | Buy | +20,000 | $45.33 | $906.60K | 279,851 |
| Gene Boxer General Counsel and Secretary | Mar 1, 2026 | Tax withholding | −4,547 | $44.63 | $202.93K | 74,025 |
| Cynthia Cammett Cann Chief Accounting Officer | Mar 1, 2026 | Tax withholding | −1,385 | $44.63 | $61.81K | 21,968 |
| Michael J. Desmarais Chief Human Resources Officer | Mar 1, 2026 | Tax withholding | −6,353 | $44.63 | $283.53K | 72,922 |
| Frederick G. Saint President, Marketplaces | Mar 1, 2026 | Tax withholding | −11,096 | $44.63 | $495.21K | 259,851 |
| Frank Simuro Chief Technology Officer | Mar 1, 2026 | Tax withholding | −18,702 | $44.63 | $834.67K | 425,598 |
| Christian M. Lown Chief Financial Officer | Mar 1, 2026 | Tax withholding | −7,175 | $44.63 | $320.22K | 122,982 |
| Lisa Ruggles Senior VP, Global Operations | Mar 1, 2026 | Tax withholding | −8,931 | $44.63 | $398.59K | 177,892 |
| Andrew C. Florance President and CEO, Director | Mar 1, 2026 | Tax withholding | −59,593 | $44.63 | $2.66M | 1,527,273 |
| Andrew C. Florance President and CEO, Director | Feb 27, 2026 | Buy | +55,720 | $44.52 | $2.48M | 1,586,866 |
| Lisa Ruggles Senior VP, Global Operations | Feb 19, 2026 | Returned to company | −17,583 | – | – | 190,042 |
| Lisa Ruggles Senior VP, Global Operations | Feb 19, 2026 | Tax withholding | −3,219 | $49.07 | $157.96K | 186,823 |
| Frank Simuro Chief Technology Officer | Feb 19, 2026 | Tax withholding | −4,421 | $49.07 | $216.94K | 444,300 |
| Frank Simuro Chief Technology Officer | Feb 19, 2026 | Returned to company | −30,727 | – | – | 448,721 |
| Andrew C. Florance President and CEO, Director | Feb 19, 2026 | Tax withholding | −19,221 | $49.07 | $943.17K | 1,531,146 |
| Andrew C. Florance President and CEO, Director | Feb 19, 2026 | Returned to company | −104,983 | – | – | 1,550,367 |
| Frederick G. Saint President, Marketplaces | Feb 19, 2026 | Tax withholding | −2,149 | $49.07 | $105.45K | 270,947 |
| Frederick G. Saint President, Marketplaces | Feb 19, 2026 | Returned to company | −17,583 | – | – | 273,096 |
| Frank Simuro Chief Technology Officer | Feb 15, 2026 | Tax withholding | −4,151 | $44.99 | $186.75K | 479,448 |
| Lisa Ruggles Senior VP, Global Operations | Feb 15, 2026 | Tax withholding | −3,576 | $44.99 | $160.88K | 207,625 |
| Andrew C. Florance President and CEO, Director | Feb 15, 2026 | Tax withholding | −17,482 | $44.99 | $786.52K | 1,655,350 |
| Frederick G. Saint President, Marketplaces | Feb 15, 2026 | Tax withholding | −2,424 | $44.99 | $109.06K | 290,679 |
| Cynthia Cammett Cann Chief Accounting Officer | Nov 13, 2025 | Sale | −1,841 | $68.79 | $126.64K | 23,211 |
| John W. Hill Director | Nov 13, 2025 | Sale | −2,250 | $68.68 | $154.53K | 18,231 |
| John W. Hill Director | Sep 9, 2025 | Award | +3,177 | – | – | 20,481 |
| Rachel C. Glaser Director | Sep 9, 2025 | Award | +3,143 | – | – | 3,143 |
| Robert W. Musslewhite Director | Sep 9, 2025 | Award | +3,121 | – | – | 18,277 |
| Louise S. Sams Director | Sep 9, 2025 | Award | +3,291 | – | – | 19,409 |
| John L. Berisford Director | Sep 9, 2025 | Award | +2,973 | – | – | 2,973 |
| Christine M. McCarthy Director | Sep 9, 2025 | Award | +2,973 | – | – | 2,973 |
| Angelique G. Brunner Director | Sep 9, 2025 | Award | +3,143 | – | – | 10,166 |
Awards, option exercises, tax withholding and gifts are shown alongside open-market buys and sales. Each name links to the filing on SEC EDGAR.
Planned insider sales
Notices of proposed sale filed on Form 144 before shares are sold
| Seller | Filed | Shares | Market value | Planned sale | Acquired through |
|---|---|---|---|---|---|
| John W. Hill Director | Aug 5, 2026 | 3,500 | $106.07K | Aug 5, 2026 | Payment for services rendered |
| John W. Hill Director, Member of immediate family of any of the foregoing | Nov 13, 2025 | 2,250 | $151.92K | Nov 13, 2025 | Payment for Services Rendered |
| Saint Frederick Officer | Aug 28, 2025 | 25,000 | $2.26M | Aug 28, 2025 | Restricted Stock |
| Saint Frederick Officer | Jul 28, 2025 | 25,000 | $2.33M | Jul 28, 2025 | Restricted Stock |
| Saint Frederick Officer, Director | Jun 11, 2025 | 25,000 | $2.03M | Jun 11, 2025 | Performance Shares |
| Klein Michael Former Board Member, retired less than 90 days ago | May 12, 2025 | 267,936 | $20.15M | May 12, 2025 | Founder's Shares |
| Klein Michael Former Board Member, retired less than 90 days ago | May 9, 2025 | 32,064 | $2.42M | May 9, 2025 | Founder's Shares |
| John W. Hill Director | Dec 10, 2024 | 2,735 | $215.10K | Dec 10, 2024 | Payment for Services Rendered |
| J. Nasseta Christopher Director | Nov 27, 2024 | 1,681 | $134.35K | Nov 27, 2024 | Acquired as compensation -- Restricted Stock Awards |
| Desmarais Michael Officer | Nov 26, 2024 | 5,500 | $439.32K | Nov 26, 2024 | Restricted Stock |
| Klein Michael Director | Oct 25, 2024 | 71,633 | $5.30M | Oct 25, 2024 | Founder's Shares |
| John W. Hill Director | Jul 30, 2024 | 1,325 | $103.00K | Jul 30, 2024 | payment for services rendered |
| Saint Frederick Officer | May 16, 2024 | 2,500 | $221.07K | May 16, 2024 | Restricted Stock |
| C. Ruggles Lisa Officer | May 9, 2024 | 20,000 | $1.82M | May 9, 2024 | Restricted Stock |
| Wheeler Scott Officer | Apr 26, 2024 | 122,736 | $11.37M | Apr 26, 2024 | Stock Option Exercise |