InsiderGlobe

CSGP

insider transactions

COSTAR 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).

30D 90D 1Y

Cluster buy signal: Multiple insiders at the same company buying around the same time — often a stronger signal than a single buy. 4 different insiders made open-market purchases in the last 365 days, totalling $6.0M.

Net shares · 365d

+93.0K

149.2K buy · 56.1K sell

Net value · 365d

$935.8K

$6.0M in · $5.1M out

Sentiment · 365d

Net buying

54% buying · 46% selling

Open-market trades · 365d

11

149.2K buy · 56.1K sell

Net buy / sell volume

Tap or hover the chart for daily net volume. Green = net buying, red = net selling.

Transactions · 365d

Open-market Buys Sells All types

Buy Sell Non-market (grant · exercise · gift)

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.