CSGP
insider transactionsCOSTAR GROUP, INC. — buys & sells by directors, officers and 10% owners A shareholder owning more than 10% of the company. Must report trades, but usually a weaker signal than an officer or director. (SEC Form 4).
Net shares · 90d
+71.4K
71.4K buy · 0 sell
Net value · 90d
$2.5M
$2.5M in · $0 out
Sentiment · 90d
Net buying
100% buying · 0% selling
Open-market trades · 90d
2
71.4K buy · 0 sell
Net buy / sell volume
Not enough data to chart yet.
Tap or hover the chart for daily net volume. Green = net buying, red = net selling.
All transactions
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Other·F
Chief Accounting Officer
$14.8K
461 sh · $32.04
Own -2%
-
Buy·P
President and CEO
$111.0K
3.1K sh · $35.82
Own +0%
-
Buy·P
President and CEO
$2.4M
68.3K sh · $35.17
Own +4%
| Date▾ | Insider | Type | Shares | Value |
|---|---|---|---|---|
| Jun 15, 2026 | Cynthia Cammett Cann | Other F | 461 | $14.8K |
| May 1, 2026 | Andrew C Florance KEY | Buy P | 3.1K | $111.0K |
| May 1, 2026 | Andrew C Florance KEY | Buy P | 68.3K | $2.4M |
About CSGP insider trading
This page tracks insider transactions for COSTAR GROUP, INC. (CSGP) reported to the U.S. Securities and Exchange Commission on Form 4. Corporate insiders — directors, executive officers and beneficial owners of more than 10% of the stock — must disclose their trades within two business days. Open-market purchases (code P) and sales (code S) made at the insider's discretion are the most-watched opportunistic signals, while awards (A), option exercises (M) and tax-withholding (F) reflect compensation rather than conviction. Trades marked 10b5-1 were made under a pre-arranged plan and are considered routine. A cluster buy — several insiders buying within a short window — is historically a stronger bullish indicator than any single trade.