Form 4: CoStar Officer Sells Shares Under 10b5-1 Plan

CoStar Group's Chief Accounting Officer, Cynthia Cammett Cann, disposed of 1,194 shares of common stock to cover tax obligations.

Summary

• Cynthia Cammett Cann, Chief Accounting Officer of CoStar Group, Inc. (CSGP), reported a disposition of common stock.
• On March 15, 2026, 1,194 shares of CoStar Group common stock were disposed of.
• The transaction was coded 'F', indicating a disposition to the issuer to satisfy tax withholding obligations related to equity awards.
• The price per share for the disposition was $43.63, based on the closing price of the company's common stock on Nasdaq on March 13, 2026.
• Following this transaction, Ms. Cann directly owns 25,148 shares of CoStar Group common stock.
• The transaction was made pursuant to a Rule 10b5-1(c) plan, indicating it was pre-arranged.

Sentiment

Score: 5

Explanation: StockSavvy.ai views this as a neutral event, typical for executive compensation and tax planning, with no significant implications for company performance or strategy.

Positives

• The transaction was executed under a Rule 10b5-1(c) plan, which signifies a pre-arranged, non-discretionary sale, often mitigating concerns about opportunistic insider trading.

Negatives

• The disposition of shares by a Chief Accounting Officer, even for tax purposes, results in a reduction of their direct beneficial ownership in the company.

Future Outlook

NA

Industry Context

StockSavvy.ai notes that insider sales, particularly those for tax withholding purposes under a 10b5-1 plan, are common occurrences in the technology and real estate information services sector, reflecting the vesting of equity compensation.

Related Party Transactions

• The disposition of shares to the issuer to satisfy tax withholding obligations related to equity compensation is a common related-party transaction.

Stakeholder Impact

• Shareholders: The disposition of shares for tax withholding is a routine event and typically has a negligible impact on the overall share float or market perception.
• Reporting Person: Cynthia Cammett Cann's direct beneficial ownership of CoStar Group common stock decreased by 1,194 shares, fulfilling tax obligations related to equity compensation.

Key Dates

Recommendation

This Form 4 reports a routine, pre-scheduled disposition of shares by an executive for tax withholding purposes, which is a common occurrence and does not reflect a change in the company's fundamentals or the executive's long-term view. Therefore, it does not warrant a change in investment recommendation.

Keywords

CoStar Group, CSGP, Form 4, Insider Transaction, Stock Sale, Cynthia Cammett Cann, Chief Accounting Officer, 10b5-1 Plan, Equity Compensation