The CEO's open-market buy is a modest positive signal, but its tiny size relative to market cap limits conviction. Monitor for additional insider buying or upcoming earnings/catalysts that could confirm a bullish view. The small sells by the CAO and director are routine and not concerning.
Price Chart
Executive Summary
CoStar Group CEO Andrew Florance purchased $2.49M of stock on the open market, while the CAO and a director sold a combined $253K. The CEO's buy is a positive signal but represents only ~0.02% of the $12.3B market cap, making it trivial in proportional terms. The cluster is mixed but buy-dominant by dollar value and seniority.
Key Financial Metrics
Key Facts
- CEO Andrew Florance bought 83,300 shares at $29.89 for $2.49M on 2026-08-04.
- CAO Cynthia Cannett sold 4,788 shares at $30.78 for $147K on 2026-08-07.
- Director John Hill sold 3,500 shares at $30.21 for $106K on 2026-08-05.
- Total insider trading value in the cluster is ~$2.64M, with net direction buy-dominant.
- The CEO's buy is only ~0.02% of CoStar's $12.3B market cap.
Financial Impact
CEO purchase of $2.49M is trivial relative to $12.3B market cap; sells of $253K are immaterial.
Risk Factors
- Historical bullish calls on CSGP have underperformed (0% win rate at T+20 over 7 settled reports).
- The cluster is mixed and the buy is proportionally insignificant, limiting signal strength.
Market Snapshot
Investment Themes
Documents Analyzed
This report is based on 1 SEC document filed with EDGAR.
| Document | Accession Number |
|---|---|
| CLUSTER Data (Synthetic) | cluster-CSGP-1786392475366 |
Filters
| Type | Now | ||||
|---|---|---|---|---|---|
Aug 16, 2026 6w ago | Institutional Cluster | $31.35 $31.56 | ▲ +0.67% | ▲ +2.65% | $27.23 (−13.16%) |
Aug 10, 2026 7w ago | Insider Cluster | $31.12 $29.58 | ▼ −4.95% | ▼ −3.89% | $27.23 (−12.52%) |
Jul 13, 2026 11w ago | 8-K | $27.68 $31.12 | ▲ +12.43% | ▲ +9.94% | $27.23 (−1.64%) |
May 29, 2026 18w ago | 8-K | $32.15 $30.25 | ▼ −5.90% | ▼ −2.27% | $27.23 (−15.31%) |
May 18, 2026 19w ago | DEFA14A | $33.18 $32.04 | ▼ −3.43% | ▼ −5.62% | $27.23 (−17.94%) |
Feb 27, 2026 31w ago | Insider Cluster | $44.60 $39.75 | ▼ −10.88% | ▼ −3.32% | $27.23 (−38.95%) |
Feb 27, 2026 31w ago | Insider Cluster | $44.60 $39.75 | ▼ −10.88% | ▼ −3.32% | $27.23 (−38.95%) |
Feb 24, 2026 31w ago | 8-K | $44.67 $41.37 | ▼ −7.39% | ▼ −2.15% | $27.23 (−39.05%) |
US Market Status
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