Insider Cluster (1 insider) ·Filed Feb 27, 2026
Insider cluster: 4 insiders, $3.5M total
Actionable Insight • Neutral
Monitor for follow-up purchases by other insiders; this single small buy is not a strong catalyst but reflects continued board-level confidence.
Final — all horizons settled through T+60d
CSGP ▼ -27.08% at T+60d
NEUTRAL call ✗ call lost -27.08% · α vs SPY -36.47% · entry $44.60 → $32.52
T+1d
+1.14%
call +1.14% · α +1.09%
$45.11
settled 7mo ago
T+5d
+8.48%
call +8.48% · α +10.46%
$48.38
settled 7mo ago
T+20d
-10.88%
call -10.88% · α -3.32%
$39.75
settled 6mo ago
T+60d
-27.08%
call -27.08% · α -36.47%
$32.52
settled 4mo ago
Price Chart
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Executive Summary
A director at CoStar Group, Louise S. Sams, purchased $48,360 worth of shares in an open-market transaction. This is a modest, positive insider signal but represents a very small fraction of the company's $20.3B market cap.
Key Financial Metrics
Direction
buying
Total Value
$48.4K
Insiders
1
Key Facts
- Director Louise S. Sams bought 1,000 shares at $48.36 per share for a total of $48,360
- Transaction occurred on March 6, 2026, in the open market
- Only one transaction in the 7-day cluster window
- Total value represents less than 0.0003% of CoStar Group's $20.3B market cap
Financial Impact
$48,360 in open-market purchases
insider sentimentshare ownership
Risk Factors
- Single transaction by a non-executive director carries limited predictive weight
- No other insiders participated in recent buying
Market Snapshot
Exchange
Nasdaq
Investment Themes
Software & IT
Documents Analyzed
This report is based on 1 SEC document filed with EDGAR.
| Document | Accession Number |
|---|---|
| CONTEXT: Insider Cluster Data (1 trades, 7d window) | cluster-CSGP-1773057630013 |
8 reports for CSGP
100% Hit rate best @ T+5▲ +8.48%
Filters
Rows
| Type | Now | ||||
|---|---|---|---|---|---|
Aug 16, 2026 6w ago | Institutional Cluster | $31.35 $31.56 | ▲ +0.67% | ▲ +2.65% | $27.38 (−12.66%) |
Aug 10, 2026 7w ago | Insider Cluster | $31.12 $29.58 | ▼ −4.95% | ▼ −3.89% | $27.38 (−12.02%) |
Jul 13, 2026 11w ago | 8-K | $27.68 $31.12 | ▲ +12.43% | ▲ +9.94% | $27.38 (−1.08%) |
May 29, 2026 18w ago | 8-K | $32.15 $30.25 | ▼ −5.90% | ▼ −2.27% | $27.38 (−14.83%) |
May 18, 2026 19w ago | DEFA14A | $33.18 $32.04 | ▼ −3.43% | ▼ −5.62% | $27.38 (−17.47%) |
Feb 27, 2026 31w ago | Insider Cluster | $44.60 $39.75 | ▼ −10.88% | ▼ −3.32% | $27.38 (−38.61%) |
Feb 27, 2026 31w ago | Insider Cluster | $44.60 $39.75 | ▼ −10.88% | ▼ −3.32% | $27.38 (−38.61%) |
Feb 24, 2026 31w ago | 8-K | $44.67 $41.37 | ▼ −7.39% | ▼ −2.15% | $27.38 (−38.70%) |
Showing 8 of 8
US Market Status
Market Closed — Opens Mon (65h 28m)
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