SEC Filing Analysis: COSTAR GROUP, INC. (CSGP)

Executive Summary

• Trading Significance: Low
• Key Takeaway: Chief Accounting Officer receives routine equity award valued at approximately $202k.
• Market Impact: Neutral; transaction is part of a standard incentive plan with negligible dilution.

Company Information

Field	Value
Company	COSTAR GROUP, INC.
Ticker Symbol	CSGP
CIK	0001057352
Industry	Services-Business Services

Insider Information

Field	Value
Name	Cann Cynthia Cammett
CIK	0001472762
Title/Position	Chief Accounting Officer
Relationship	Officer

Transaction Details

Field	Value
Form Type	4
Transaction Date	2026-03-10
Transaction Code	A (Grant/Award)
Security Type	Common Stock
Shares Involved	4,374
Price Per Share	$46.34 (Conversion Price)
Total Value	~$202,691
Shares Owned After	26,342
Ownership Type	Direct

Financial Impact Assessment

Transaction Materiality

Metric	Value
Transaction Value	~$202,691
% of Market Cap	~0.001%
Shares Transacted	4,374
% of Shares Outstanding	~0.001%
Post-Transaction Ownership	26,342 shares (~0.006% of outstanding)
Materiality Assessment	Low

Impact Evaluation

• Market Cap Context: With a market capitalization of $20.31 billion, a $202k transaction is immaterial to the broader market.
• Ownership Concentration: The insider holds a minor stake (0.006%) relative to the 419.79 million shares outstanding.
• Dilution Impact: The issuance of 4,374 shares results in virtually zero dilution for existing shareholders.

Market Impact Analysis

Stock Impact Prediction

• Direction: Neutral
• Reasoning: This is a scheduled compensation event (Management Stock Purchase Plan) rather than an open market purchase or sale indicating sentiment.

Volume & Sentiment

• Expected Volume Impact: None.
• Sentiment Indicator: Neutral.

Additional Context

Transaction Notes

• Plan Details: Shares were acquired pursuant to the Management Stock Purchase Plan. A portion of the annual cash incentive was converted to Deferred Stock Units at $46.34 per unit, alongside a matching RSU grant vesting over four years.
• Vesting: The Restricted Stock Units vest in full after four years.