COSTAR GROUP, INC. (CSGP) — real insider trading activity disclosed to the SEC, tracked automatically as new Form 4 filings are reported. Most recent: FLORANCE ANDREW C disclosed a transaction on 2026-08-04 worth $2,489,837.
Transactions disclosed by company insiders to the SEC on Form 4, most recent first.
| Insider | Role | Date | Shares | Value |
|---|---|---|---|---|
| Cann Cynthia Cammett | Chief Accounting Officer | 2026-08-07 | 4,788 | $147,375 |
| Hill John W | Director | 2026-08-05 | 3,500 | $105,735 |
| FLORANCE ANDREW C | Founder and CEO | 2026-08-04 | 83,300 | $2,489,837 |
| Cann Cynthia Cammett | Chief Accounting Officer | 2026-08-01 | 1,077 | $30,975 |
| SAINT FREDERICK G. | President, Marketplaces | 2026-08-01 | 1,436 | $41,299 |
Position changes disclosed in SEC Form 13F filings. These report a quarterly snapshot, not exact trade dates.
| Fund | Change | Quarter |
|---|---|---|
| NORGES BANK | NORGES BANK opened a new position worth $168,501,508. | 2026-06-30 |
| EdgePoint Investment Group Inc. | EdgePoint Investment Group Inc. opened a new position worth $168,504,057. | 2026-06-30 |
| Qube Research & Technologies Ltd | Qube Research & Technologies Ltd opened a new position worth $91,144,210. | 2026-06-30 |
| TIGER GLOBAL MANAGEMENT LLC | TIGER GLOBAL MANAGEMENT LLC exited a position previously worth $60,510,000. | 2026-06-30 |
| Erste Asset Management GmbH | Erste Asset Management GmbH increased this position by 171% ($18,396,000 -> $49,844,000). | 2026-06-30 |
| BAILLIE GIFFORD & CO | BAILLIE GIFFORD & CO increased this position by 949% ($18,913,530 -> $198,477,463). | 2026-06-30 |
| ARROWSTREET CAPITAL, LIMITED PARTNERSHIP | ARROWSTREET CAPITAL, LIMITED PARTNERSHIP increased this position by 2130% ($1,650,350 -> $36,803,483). | 2026-06-30 |
| Spyglass Capital Management LLC | Spyglass Capital Management LLC increased this position by 70% ($44,826,776 -> $76,313,819). | 2026-06-30 |
Largest reported positions as of 2026-06-30.
| Fund | Value | Shares |
|---|---|---|
| VANGUARD PORTFOLIO MANAGEMENT LLC | $1,073,748,382 | 37,914,844 |
| VANGUARD CAPITAL MANAGEMENT LLC | $755,684,989 | 26,683,792 |
| BAMCO INC /NY/ | $612,469,928 | 21,626,763 |
| Capital International Investors | $471,330,213 | 16,643,016 |
| AKRE CAPITAL MANAGEMENT LLC | $331,326,895 | 11,699,396 |
| GEODE CAPITAL MANAGEMENT, LLC | $304,726,791 | 10,804,293 |
| POLEN CAPITAL MANAGEMENT LLC | $248,063,762 | 8,759,314 |
| BAILLIE GIFFORD & CO | $198,477,463 | 7,008,385 |
| EdgePoint Investment Group Inc. | $168,504,057 | 5,950,002 |
| NORGES BANK | $168,501,508 | 5,949,912 |
Data compiled from public SEC filings. This is informational reporting, not investment advice.
Andrew C. Florance, the founder and chief executive officer of CoStar Group, Inc. (NASDAQ: CSGP), disclosed an open-market purchase of company stock in a Form 4 filing tied to a transaction dated August 4, 2026. Florance bought 83,300 shares at a price of $29.89 per share, a total outlay of $2,489,837.00 paid with his own … Read more