2m 2m 2m 2m 2m 2m 2m
CoStar Group (CSGP)
NASDAQ
$30.65+$0.39 (+1.29%)
Price as of Jun 23, 2026 7:59 PM EDT- $11.9BMarket Cap
- -63.49%1-Year Change
- Real Estate ServicesIndustry
CoStar Group (CSGP)
$30.65+$0.39 (+1.29%)
Top Holders
Institutional
Mutual Funds
Holder | Ownership %
| Shares Held | Change (Shares, %) | Report Date |
|---|---|---|---|---|
VANGUARD GROUP INC | 17.17% | 70.1M | +52,558 (+0.07%) | Dec 31, 2025 |
BLACKROCK INC. | 9.44% | 38.6M | -325,365 (-0.84%) | Jun 30, 2024 |
N/A | 9.36% | 38.2M | +38.2M (+100.00%) | Mar 31, 2026 |
BLACKROCK FUNDING, INC. /DE | 9.33% | 38.1M | -770,199 (-2.02%) | Dec 31, 2024 |
BLACKROCK, INC. | 8.28% | 33.8M | -162,442 (-0.48%) | Mar 31, 2026 |
STATE STREET CORP | 4.57% | 18.7M | +18,623 (+0.10%) | Mar 31, 2026 |
PRINCIPAL FINANCIAL GROUP INC | 4.33% | 17.7M | +130,118 (+0.74%) | Mar 31, 2026 |
Holder | Ownership %
| Shares Held | Change (Shares, %) | Report Date |
|---|---|---|---|---|
VANGUARD INDEX FUNDS | 10.39% | 42.4M | -256,163 (-0.60%) | Mar 31, 2026 |
JOHN HANCOCK SOVEREIGN BOND FUND | 7.52% | 30.7M | 0 (0.00%) | Feb 28, 2026 |
JANUS INVESTMENT FUND | 4.32% | 17.7M | 0 (0.00%) | Mar 31, 2026 |
LORD ABBETT BOND DEBENTURE FUND INC | 4.23% | 17.3M | 0 (0.00%) | Mar 31, 2026 |
VANGUARD SPECIALIZED FUNDS | 3.85% | 15.7M | +152,838 (+0.97%) | Jan 31, 2026 |
THORNBURG INVESTMENT TRUST | 3.54% | 14.5M | 0 (0.00%) | Mar 31, 2026 |
iSHARES TRUST | 3.14% | 12.8M | -112,447 (-0.88%) | Mar 31, 2026 |
Current Ownership Distribution
- Institutions7.2B (70.10%)
- Mutual Funds3.0B (29.84%)
- Insiders6.1M (0.06%)
- Other0 (0.00%)
Insider Transactions
- 0.06% (6.1M)Current InsiderOwnership (%, shares)
- 3Number of InsiderBuying (last 12 months)
- $80.9MAmount of InsiderBuying (last 12 months)
- 3Number of InsiderSelling (last 12 months)
- $56.4MAmount of InsiderSelling (last 12 months)
Insider Name & Title | Type | Date
| Transaction Value | Shares | Share Price | Shares After Transactions |
|---|---|---|---|---|---|---|
Cann Cynthia Cammett Chief Accounting Officer | In Kind | Jun 15, 2026 | $14,770.44 | 461 | $32.04 | 24,687 |
Boxer Gene General Counsel and Secretary | In Kind | Mar 15, 2026 | $18,673.64 | 428 | $43.63 | 95,517 |
Ruggles Lisa Senior VP, Global Operations | In Kind | Mar 15, 2026 | $129,886.51 | 2,977 | $43.63 | 174,915 |
DESMARAIS MICHAEL J Chief Human Resources Officer | In Kind | Mar 15, 2026 | $125,348.99 | 2,873 | $43.63 | 87,725 |
SIMURO FRANK Chief Technology Officer | In Kind | Mar 15, 2026 | $484,598.41 | 11,107 | $43.63 | 414,491 |
Cann Cynthia Cammett Chief Accounting Officer | In Kind | Mar 15, 2026 | $52,094.22 | 1,194 | $43.63 | 25,148 |
FLORANCE ANDREW C President and CEO | Award | Mar 10, 2026 | $0.00 | 124,162 | $0.00 | 1.7M |
Cann Cynthia Cammett Chief Accounting Officer | Award | Mar 10, 2026 | $0.00 | 4,374 | $0.00 | 26,342 |
DESMARAIS MICHAEL J Chief Human Resources Officer | Award | Mar 10, 2026 | $0.00 | 17,676 | $0.00 | 90,598 |
LOWN CHRISTIAN M. Chief Financial Officer | Award | Mar 10, 2026 | $0.00 | 12,268 | $0.00 | 135,250 |
Boxer Gene General Counsel and Secretary | Award | Mar 10, 2026 | $0.00 | 21,920 | $0.00 | 95,945 |
Sams Louise S | Buy | Mar 06, 2026 | $48,360.00 | 1,000 | $48.36 | 20,409 |
SAINT FREDERICK G. President, Marketplaces | Buy | Mar 02, 2026 | $906,600.00 | 20,000 | $45.33 | 279,851 |
Ruggles Lisa Senior VP, Global Operations | In Kind | Mar 01, 2026 | $398,590.53 | 8,931 | $44.63 | 177,892 |
LOWN CHRISTIAN M. Chief Financial Officer | In Kind | Mar 01, 2026 | $320,220.25 | 7,175 | $44.63 | 122,982 |
DESMARAIS MICHAEL J Chief Human Resources Officer | In Kind | Mar 01, 2026 | $283,534.39 | 6,353 | $44.63 | 72,922 |
Cann Cynthia Cammett Chief Accounting Officer | In Kind | Mar 01, 2026 | $61,812.55 | 1,385 | $44.63 | 21,968 |
Boxer Gene General Counsel and Secretary | In Kind | Mar 01, 2026 | $202,932.61 | 4,547 | $44.63 | 74,025 |
SIMURO FRANK Chief Technology Officer | In Kind | Mar 01, 2026 | $834,670.26 | 18,702 | $44.63 | 425,598 |
SAINT FREDERICK G. President, Marketplaces | In Kind | Mar 01, 2026 | $495,214.48 | 11,096 | $44.63 | 259,851 |
FLORANCE ANDREW C President and CEO | In Kind | Mar 01, 2026 | $2.7M | 59,593 | $44.63 | 1.5M |
SAINT FREDERICK G. President, Marketplaces | Award | Feb 27, 2026 | $0.00 | 39,652 | $0.00 | 39,652 |
LOWN CHRISTIAN M. Chief Financial Officer | Award | Feb 27, 2026 | $0.00 | 39,652 | $0.00 | 39,652 |
FLORANCE ANDREW C President and CEO | Buy | Feb 27, 2026 | $2.5M | 55,720 | $44.52 | 1.6M |
Cann Cynthia Cammett Chief Accounting Officer | Award | Feb 27, 2026 | $0.00 | 6,834 | $0.00 | 6,834 |
DESMARAIS MICHAEL J Chief Human Resources Officer | Award | Feb 27, 2026 | $0.00 | 17,926 | $0.00 | 17,926 |
SIMURO FRANK Chief Technology Officer | Award | Feb 27, 2026 | $0.00 | 52,869 | $0.00 | 52,869 |
Boxer Gene General Counsel and Secretary | Award | Feb 27, 2026 | $0.00 | 26,888 | $0.00 | 26,888 |
FLORANCE ANDREW C President and CEO | Award | Feb 27, 2026 | $0.00 | 83,708 | $0.00 | 83,708 |
Ruggles Lisa Senior VP, Global Operations | Award | Feb 27, 2026 | $0.00 | 28,197 | $0.00 | 28,197 |