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CoStar Group (CSGP)
NASDAQ
$32.94+$0.68 (+2.10%)
Price as of Aug 24, 2026 6:23 AM EDT- $13.1BMarket Cap
- -64.63%1-Year Change
- Real Estate ServicesIndustry
CoStar Group (CSGP)
$32.94+$0.68 (+2.10%)
Top Holders
Institutional
Mutual Funds
Holder | Ownership %
| Shares Held | Change (Shares, %) | Report Date |
|---|---|---|---|---|
VANGUARD GROUP INC | 17.30% | 70.1M | +52,558 (+0.07%) | Dec 31, 2025 |
BLACKROCK INC. | 9.52% | 38.6M | -325,365 (-0.84%) | Jun 30, 2024 |
BLACKROCK FUNDING, INC. /DE | 9.41% | 38.1M | -770,199 (-2.02%) | Dec 31, 2024 |
N/A | 9.36% | 37.9M | -319,289 (-0.84%) | Jun 30, 2026 |
VANGUARD PORTFOLIO MANAGEMENT LLC | 9.36% | 37.9M | -319,289 (-0.84%) | Jun 30, 2026 |
BLACKROCK, INC. | 8.35% | 33.8M | +5,785 (+0.02%) | Jun 30, 2026 |
VANGUARD CAPITAL MANAGEMENT LLC | 6.59% | 26.7M | -740,111 (-2.77%) | Jun 30, 2026 |
Holder | Ownership %
| Shares Held | Change (Shares, %) | Report Date |
|---|---|---|---|---|
VANGUARD INDEX FUNDS | 10.47% | 42.4M | -256,163 (-0.60%) | Mar 31, 2026 |
JOHN HANCOCK SOVEREIGN BOND FUND | 7.58% | 30.7M | 0 (0.00%) | May 31, 2026 |
JANUS INVESTMENT FUND | 4.36% | 17.7M | 0 (0.00%) | Mar 31, 2026 |
LORD ABBETT BOND DEBENTURE FUND INC | 4.26% | 17.3M | 0 (0.00%) | Mar 31, 2026 |
VANGUARD SPECIALIZED FUNDS | 3.86% | 15.7M | -80,492 (-0.51%) | Apr 30, 2026 |
THORNBURG INVESTMENT TRUST | 3.57% | 14.5M | 0 (0.00%) | Mar 31, 2026 |
INVESCO QQQ TRUST, SERIES 1 | 2.18% | 8.8M | -666,093 (-7.53%) | Mar 31, 2026 |
Current Ownership Distribution
- Institutions7.6B (70.23%)
- Mutual Funds3.2B (29.71%)
- Insiders6.5M (0.06%)
- Other0 (0.00%)
Insider Transactions
- 0.06% (6.5M)Current InsiderOwnership (%, shares)
- 3Number of InsiderBuying (last 12 months)
- $132.4MAmount of InsiderBuying (last 12 months)
- 3Number of InsiderSelling (last 12 months)
- $27.8MAmount of InsiderSelling (last 12 months)
Insider Name & Title | Type | Date
| Transaction Value | Shares | Share Price | Shares After Transactions |
|---|---|---|---|---|---|---|
Cann Cynthia Cammett Chief Accounting Officer | Sell | Aug 07, 2026 | $147,374.64 | 4,788 | $30.78 | 18,822 |
Hill John W | Sell | Aug 05, 2026 | $105,735.00 | 3,500 | $30.21 | 22,993 |
FLORANCE ANDREW C Founder and CEO | Buy | Aug 04, 2026 | $2.5M | 83,300 | $29.89 | 1.8M |
Cann Cynthia Cammett Chief Accounting Officer | In Kind | Aug 01, 2026 | $30,974.52 | 1,077 | $28.76 | 23,610 |
SAINT FREDERICK G. President, Marketplaces | In Kind | Aug 01, 2026 | $41,299.36 | 1,436 | $28.76 | 278,415 |
Cann Cynthia Cammett Chief Accounting Officer | Award | Jul 31, 2026 | $0.00 | 26,078 | $0.00 | 26,078 |
Rossmann Robin Jack Chief Financial Officer | Award | Jul 31, 2026 | $0.00 | 34,771 | $0.00 | 34,771 |
LOWN CHRISTIAN M. Chief Financial Officer | In Kind | Jul 01, 2026 | $164,327.92 | 5,597 | $29.36 | 129,653 |
McCarthy Christine M | Award | Jun 23, 2026 | $0.00 | 8,262 | $0.00 | 11,585 |
Sams Louise S | Award | Jun 23, 2026 | $0.00 | 8,262 | $0.00 | 28,671 |
Glaser Rachel C | Award | Jun 23, 2026 | $0.00 | 8,262 | $0.00 | 12,419 |
Hill John W | Award | Jun 23, 2026 | $0.00 | 8,262 | $0.00 | 26,493 |
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 |