CSGP COSTAR GROUP, INC. Insider Trading

CSGP CEO Andrew C. Florance purchases 71,430 shares amid significant stock pullback from highs.

Andrew C. Florance, the President and CEO of CoStar Group, made substantial open-market purchases totaling over $2.5 million in shares while the stock trades sharply below its recent highs and has declined notably over recent months. This C-suite buying is particularly noteworthy because it occurs during a pronounced drawdown rather than at record valuations, suggesting conviction that the current price does not reflect the company's underlying value. The company remains profitable with strong revenue growth, providing a fundamentally sound backdrop for the CEO's vote of confidence through his own capital deployment.

Director Sams Louise S bought 1,000 shares (1.0K) of CSGP at $48.36; 3 other insiders bought within 14 days amid -50.0% pullback from 52-week high

Director Sams Louise S purchased 1,000 shares of COSTAR GROUP at $48.36, bringing holdings to 20,409 shares (+5.2%). This transaction is notable not in isolation but as part of a cluster pattern: 3 other insiders also bought within the past 14 days, suggesting coordinated director-level confidence. The timing coincides with significant price weakness—the stock trades at $48.42 current price, -50.0% from its $96.83 52-week high and -28.7% over 90 days. However, fundamental context is mixed: the company reported Revenue of $833,600,000.00 (latest quarter) with annual growth of +18.7%, but posted Net income of $-30,900,000.00 (negative earnings), and the P/E ratio of 2421.00 signals unprofitable operations. The cluster buy pattern in a depressed price environment warrants monitoring, though the absence of profitability creates uncertainty about the drivers of insider demand.

COSTAR President buys 20,000 shares at $45.33; stock down -51.7% from 52-week high. Cluster buy by 2 other insiders in past 14 days.

Frederick G. Saint, President of Marketplaces at CoStar, purchased 20,000 shares at $45.33 on 2026-03-02, increasing his holdings by 7.7% to 279.9K shares. The purchase occurred as the stock trades 51.7% below its 52-week high of $96.83 and has declined 23.9% in the past 30 days and 32.2% over 90 days. Saint's cross-ticker track record shows 3 prior sells with a 66.67% well-timed rate at the 90-day mark, though his two most recent same-ticker sales at CSGP (Aug-28 and Jul-28, 2025) were both well-timed against declines. The buy is part of a broader cluster pattern, with 2 other insiders purchasing within the past 14 days, suggesting coordinated confidence at depressed valuations. However, CoStar's fundamentals present complexity: the company reported net income of $-30.9M in the latest quarter despite 18.7% annual revenue growth, and trades at an extreme P/E of 2339.00, reflecting market skepticism about near-term profitability even as top-line growth accelerates.

Director Glaser buys 1,000 CSGP shares at $44.94 amid 2-insider cluster pattern; stock down -51.7% from 52-week high.

Director Rachel C Glaser purchased 1,000 shares at $44.94, increasing her holdings by 31.7% from 3,157 to 4,157 shares. This transaction occurs within a cluster pattern where 2 other insiders also bought within the past 14 days. The stock is currently trading at $46.78, down -51.7% from its 52-week high of $96.83 and down -23.9% over the past 30 days. While the company reported annual revenue growth of +18.7% and latest quarter revenue of $833.6M, it posted a net loss of $-30.9M with an elevated P/E of 2339.00, indicating earnings pressure. The multi-insider purchase pattern during a period of significant price weakness and operational losses merits monitoring for signals about internal assessments of value.

CSGP President/CEO Florance buys 55,720 shares at $44.52; stock down 53.4% from 52-week high amid $-30.9M net loss.

FLORANCE ANDREW C, the company's President and CEO, purchased 55,720 shares at $44.52 on 2026-02-27, bringing his holdings to 1,586,866 shares and representing a 3.6% increase in his position. The transaction occurs as CSGP trades 53.4% below its 52-week high and down 26.6% over the past 30 days, while the company reported a net loss of $-30.9M in the latest quarter despite achieving 18.7% annual revenue growth. A cluster of 2 other insiders also bought within the past 14 days, indicating multiple executives are acquiring at these depressed price levels. The insider's prior buy at this ticker in October 2024 yielded a 90-day return of -0.4%, suggesting his past accumulation has not yet reversed into gains, and his cross-ticker track record shows a 0.00% 90-day win rate across all open-market buys.

CSGP President Frederick G. Saint sold 25,000 shares at $90.33 on 2025-08-28; stock now at $88.12 (-9.0% from 52-week high).

Frederick G. Saint, President of Marketplaces at CoStar Group, sold 25,000 shares for $2,258,250.00, reducing his holdings from 318,103 shares to 293,103 shares. The sale occurred at $90.33, and the stock has since declined to $88.12 (a -6.8% move over 30 days). Saint's cross-ticker track record shows 2 prior sells with an average 30-day return of +0.6%, while his same-ticker history at CSGP includes a prior sell on 2025-07-28 that experienced a -4.0% 30-day return. The company shows strong annual revenue growth of +11.4% to $781,300,000.00, but a notably elevated P/E of 352.48 and minimal profitability ($6,200,000.00 net income) warrant attention to valuation dynamics relative to the price action and insider liquidation pattern.

President of Marketplaces Frederick G. Saint sold 25,000 shares (25.0K) of CSGP at $93.23 for $2,330,750.00

Frederick G. Saint, President of Marketplaces, sold 25,000 shares at $93.23, reducing his holdings by 7.3% to 319,539 shares post-transaction. The sale occurred while CSGP stock has appreciated 18.4% over the past 30 days and 28.9% over the past 90 days, trading near its 52-week high of $95.59. Across his cross-ticker track record, Saint has executed 1 prior sell with an average 30-day return of +5.3%, and at CSGP specifically, a prior sale on 2025-06-11 also showed a +5.3% 30-day outcome. The company reports a highly elevated P/E of 382.36 against recent revenue of $781,300,000.00 and net income of $6,200,000.00, indicating significant valuation compression despite 11.4% annual revenue growth. This transaction represents a routine partial reduction in a substantial long position during a period of significant stock appreciation.

CoStar President Frederick Saint sells 25,000 shares at $81.10; holds 344,539 shares post-sale as stock trades near 52-week high

Frederick G. Saint, President of Marketplaces at CoStar Group, sold 25,000 shares (344.5K shares remaining post-transaction) at $81.10 on 2025-06-11, representing a $2.0M transaction. The sale occurred while the stock trades at $82.37, near its 52-week high of $83.22, and follows strong short-term momentum with a 30-day gain of +9.6%. However, context is limited: the company is trading at an elevated P/E of 294.18 despite recent net losses of $-14.8M, and without disclosure of whether this sale was scheduled under a 10b5-1 plan, its timing relative to Saint's historical trading patterns, or any material non-public information, the transaction does not signal a clear strategic change. Saint retains substantial holdings (344.5K shares), suggesting ongoing stakes in the company.

Director Michael R. Klein sold 71,633 shares of CSGP at $74.69; remains largest holder with 1.91M shares post-sale.

Director Michael R. Klein sold 71,633 shares (71.6K shares) on 2024-10-25 at $74.69, reducing holdings by 3.6% to 1,913,501 shares (1.91M shares). The stock has declined 24.0% from its 52-week high of $97.73 and currently trades at $74.31, near the sale price. Klein's cross-ticker track record shows 2 prior sells with an average 90-day return of -0.2% and a 50.00% well-timed rate, indicating mixed prior execution. Despite elevated valuation (P/E of 172.81), the company demonstrated solid fundamentals with $692.6M in quarterly revenue and 12.5% annual revenue growth; the $5.4M transaction represents a modest reduction in what remains substantial insider ownership.

CoStar CEO Andrew C Florance bought 14,731 shares at $74.67 on 2024-10-25, expanding holdings to 1,263,098 shares.

FLORANCE ANDREW C, as President and CEO, purchased 14,731 shares for $1,099,966.01 at $74.67 per share, increasing his total holdings by 1.2% to 1,263,098 shares. The stock is currently trading at $74.31, near the transaction price, and sits 24.0% below the 52-week high of $97.73, having declined 5.3% over the past 90 days. While the company shows strong fundamentals with annual revenue growth of 12.5% and net income of $53,000,000 on revenue of $692,600,000, the elevated P/E of 172.81 reflects current market valuation. The insider's purchase occurs at a depressed price relative to recent highs, though without additional context regarding execution circumstances or prior trading patterns at this ticker, the transaction stands as a factual open-market acquisition by the CEO.