The concentrated buying by top executives, especially the CEO, suggests strong conviction in the company's valuation or upcoming prospects. Traders should monitor for potential catalysts such as earnings, new product rollouts, or market expansion.
Price Chart
Executive Summary
Multiple CoStar Group insiders made open-market purchases totaling $3.4 million over the past week, led by CEO Andrew Florance and President Frederick Saint. The transactions include a mix of direct buys and a tax withholding event, with the latter representing a non-cash transaction.
Key Financial Metrics
Key Facts
- CEO Andrew Florance purchased 55,720 shares for $2.48 million in an open-market transaction.
- President Frederick Saint bought 20,000 shares for $906,600, signaling strong confidence.
- A separate transaction of 11,096 shares by Saint was a tax withholding (F), valued at $495,214, which is non-cash and routine.
- Total open-market buying volume by insiders: $3.43 million over 7 days.
Financial Impact
$3.43 million in open-market purchases by insiders, representing 0.018% of CoStar's $19.0B market cap
Risk Factors
- The tax withholding transaction (F) is non-economic and should not be interpreted as selling pressure.
- Insider purchases do not guarantee positive future performance, though they are a strong sentiment signal.
Market Snapshot
Investment Themes
Documents Analyzed
This report is based on 1 SEC document filed with EDGAR.
| Document | Accession Number |
|---|---|
| CONTEXT: Insider Cluster Data (4 trades, 7d window) | cluster-CSGP-1772572734437 |
Track record builds as more directional reports settle.
Filters
| Type | Now | ||||
|---|---|---|---|---|---|
Aug 16, 2026 6w ago | Institutional Cluster | $31.35 $31.56 | ▲ +0.67% | ▲ +2.65% | $27.19 (−13.27%) |
Aug 10, 2026 7w ago | Insider Cluster | $31.12 $29.58 | ▼ −4.95% | ▼ −3.89% | $27.19 (−12.63%) |
Jul 13, 2026 11w ago | 8-K | $27.68 $31.12 | ▲ +12.43% | ▲ +9.94% | $27.19 (−1.77%) |
May 29, 2026 18w ago | 8-K | $32.15 $30.25 | ▼ −5.90% | ▼ −2.27% | $27.19 (−15.42%) |
May 18, 2026 19w ago | DEFA14A | $33.18 $32.04 | ▼ −3.43% | ▼ −5.62% | $27.19 (−18.05%) |
Feb 27, 2026 31w ago | Insider Cluster | $44.60 $39.75 | ▼ −10.88% | ▼ −3.32% | $27.19 (−39.03%) |
Feb 27, 2026 31w ago | Insider Cluster | $44.60 $39.75 | ▼ −10.88% | ▼ −3.32% | $27.19 (−39.03%) |
Feb 24, 2026 31w ago | 8-K | $44.67 $41.37 | ▼ −7.39% | ▼ −2.15% | $27.19 (−39.13%) |
US Market Status
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