CSGP
CoStar Group, Inc.
NASDAQ · Real Estate · Real Estate - Services · US
$30.91
−2.43%1
Insider buys (3m)
2
Insider sells (3m)
$2.2M
Net value (3m)
-8.6%
Price return (3m)
Form 4 filings
| Date | Insider | Activity | Shares | Price |
|---|---|---|---|---|
| Aug 10, 2026 | Cann Cynthia Cammett · officer: Chief Accounting Officer | Sale | 4,788 | $31 |
| Aug 10, 2026 | Hill John W · director | Sale | 3,500 | $30 |
| Aug 5, 2026 | FLORANCE ANDREW C · director, officer: Founder and CEO | Purchase | 83,300 | $30 |
| Aug 4, 2026 | Cann Cynthia Cammett · officer: Chief Accounting Officer | F-InKind | 1,077 | $29 |
| Aug 4, 2026 | Rossmann Robin Jack · officer: Chief Financial Officer | A-Award | 34,771 | $0.00 |
| Aug 4, 2026 | SAINT FREDERICK G. · officer: President, Marketplaces | F-InKind | 1,436 | $29 |
| Aug 4, 2026 | Cann Cynthia Cammett · officer: Chief Accounting Officer | A-Award | 26,078 | $0.00 |
| Jul 6, 2026 | LOWN CHRISTIAN M. · officer: Chief Financial Officer | F-InKind | 5,597 | $29 |
| Jun 24, 2026 | Musslewhite Robert W · director | A-Award | 8,262 | $0.00 |
| Jun 24, 2026 | Hill John W · director | A-Award | 8,262 | $0.00 |
| Jun 24, 2026 | Brunner Angelique G. · director | A-Award | 8,262 | $0.00 |
| Jun 24, 2026 | McCarthy Christine M · director | A-Award | 8,262 | $0.00 |
| Jun 24, 2026 | Sams Louise S · director | A-Award | 8,262 | $0.00 |
| Jun 24, 2026 | Glaser Rachel C · director | A-Award | 8,262 | $0.00 |
| Jun 24, 2026 | BERISFORD JOHN L · director | A-Award | 8,262 | $0.00 |
| Jun 16, 2026 | Cann Cynthia Cammett · officer: Chief Accounting Officer | F-InKind | 461 | $32 |
| May 4, 2026 | FLORANCE ANDREW C · director, officer: President and CEO | Purchase | 3,100 | $36 |
| May 4, 2026 | FLORANCE ANDREW C · director, officer: President and CEO | Purchase | 68,330 | $35 |
| Mar 17, 2026 | SIMURO FRANK · officer: Chief Technology Officer | F-InKind | 11,107 | $44 |
| Mar 17, 2026 | Ruggles Lisa · officer: Senior VP, Global Operations | F-InKind | 2,977 | $44 |
| Mar 17, 2026 | Cann Cynthia Cammett · officer: Chief Accounting Officer | F-InKind | 1,194 | $44 |
| Mar 17, 2026 | Boxer Gene · officer: General Counsel and Secretary | F-InKind | 428 | $44 |
| Mar 17, 2026 | Boxer Gene · officer: General Counsel and Secretary | F-InKind | 482 | $44 |
| Mar 17, 2026 | DESMARAIS MICHAEL J · officer: Chief Human Resources Officer | F-InKind | 2,873 | $44 |
| Mar 11, 2026 | LOWN CHRISTIAN M. · officer: Chief Financial Officer | A-Award | 12,268 | $46 |
| Mar 11, 2026 | Boxer Gene · officer: General Counsel and Secretary | A-Award | 21,920 | $46 |
| Mar 11, 2026 | DESMARAIS MICHAEL J · officer: Chief Human Resources Officer | A-Award | 17,676 | $46 |
| Mar 11, 2026 | Cann Cynthia Cammett · officer: Chief Accounting Officer | A-Award | 4,374 | $46 |
| Mar 11, 2026 | FLORANCE ANDREW C · director, officer: President and CEO | A-Award | 124,162 | $46 |
| Mar 9, 2026 | Sams Louise S · director | Purchase | 1,000 | $48 |
Institutional positioning
13F filings over the trailing two quarters
New 245Increased 610Reduced 553Sold out 145
| Filer | Action | Shares | Filed |
|---|---|---|---|
| VANGUARD PORTFOLIO MANAGEMENT LLC | New Position | 38,234,133 | May 8, 2026 |
| VANGUARD PORTFOLIO MANAGEMENT LLC | Reduced | 37,914,844 | Aug 13, 2026 |
| BlackRock, Inc. | Increased | 33,813,969 | Aug 7, 2026 |
| BLACKROCK, INC. | Reduced | 33,808,184 | May 13, 2026 |
| VANGUARD CAPITAL MANAGEMENT LLC | New Position | 27,423,903 | May 15, 2026 |
| VANGUARD CAPITAL MANAGEMENT LLC | Reduced | 26,683,792 | Aug 13, 2026 |
| BAMCO INC /NY/ | Increased | 21,626,763 | Aug 14, 2026 |
| STATE STREET CORP | Increased | 18,650,975 | May 15, 2026 |
| STATE STREET CORP | Reduced | 18,410,876 | Aug 7, 2026 |
| PRINCIPAL FINANCIAL GROUP INC | Increased | 17,696,192 | May 4, 2026 |
| Capital International Investors | Increased | 16,643,016 | Aug 12, 2026 |
| BAMCO INC /NY/ | Reduced | 16,314,175 | May 15, 2026 |
| CAPITAL INTERNATIONAL INVESTORS | Increased | 15,513,753 | May 13, 2026 |
| BAILLIE GIFFORD & CO | Increased | 13,610,922 | May 8, 2026 |
| BAILLIE GIFFORD & CO | Reduced | 13,154,165 | Aug 6, 2026 |
Insider activity from SEC Form 4; institutional positioning from 13F filings · Latest filing Aug 10, 2026