Why CoStar Group (CSGP) Stock Is Down Today

CoStar Group (CSGP) is down 4.3% today. Here is some analysis on what might have caused this price movement.

Analysis: The most likely driver is continued investor concern after CoStar cut its 2026 revenue outlook in late July and pointed to softer near-term bookings growth, even though profitability improved. The recent CFO transition may also be adding caution, and the weaker tone in growth stocks today could be amplifying the move.

Details:

CoStar’s second-quarter 2026 release lowered full-year revenue guidance to a range of about $3.715 billion to $3.755 billion, which appears to have reset expectations for near-term growth.

The same quarterly update highlighted much stronger earnings and EBITDA, but the market reaction suggested investors were more focused on slower top-line momentum and bookings trends than on margin improvement.

A July 2026 SEC filing disclosed that the prior chief financial officer resigned and that Robin Rossmann was appointed CFO effective July 31, 2026, creating another recent change for investors to assess.

With no major fresh company announcement found for today, part of the decline could reflect ongoing pressure from that guidance reset plus a softer broader market backdrop for higher-multiple stocks.

Sources:

CoStar Group Investor Relations, SEC, AP News

Disclaimer: This price movement analysis was generated with the help of AI. Please double-check the information provided for mistakes.

$CSGP Insider Trading Activity

$CSGP insiders have traded $CSGP stock on the open market 9 times in the past 6 months. Of those trades, 7 have been purchases and 2 have been sales.

Here’s a breakdown of recent trading of $CSGP stock by insiders over the last 6 months:

ANDREW C FLORANCE (Founder and CEO) has made 4 purchases buying 210,450 shares for an estimated $7,484,699 and 0 sales.
FREDERICK G. SAINT (President, Marketplaces) purchased 20,000 shares for an estimated $906,600
CYNTHIA CAMMETT CANN (Chief Accounting Officer) sold 4,788 shares for an estimated $147,374
JOHN W HILL sold 3,500 shares for an estimated $105,735
LOUISE S SAMS purchased 1,000 shares for an estimated $48,360
RACHEL C GLASER purchased 1,000 shares for an estimated $44,940

To track insider transactions, check out Quiver Quantitative's insider trading dashboard. You can access data on insider stock transactions through the Quiver Quantitative API insider transaction endpoint.

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$CSGP Hedge Fund Activity

We have seen 416 institutional investors add shares of $CSGP stock to their portfolio, and 543 decrease their positions in their most recent quarter.

Here are some of the largest recent moves:

PRINCIPAL FINANCIAL GROUP INC removed 13,905,398 shares (-78.6%) from their portfolio in Q2 2026, for an estimated $393,800,871
AQR CAPITAL MANAGEMENT LLC added 7,182,770 shares (+568.8%) to their portfolio in Q2 2026, for an estimated $203,416,046
EDGEPOINT INVESTMENT GROUP INC. added 5,950,002 shares (+inf%) to their portfolio in Q2 2026, for an estimated $168,504,056
BAMCO INC /NY/ added 5,312,588 shares (+32.6%) to their portfolio in Q2 2026, for an estimated $150,452,492
JPMORGAN CHASE & CO added 4,939,994 shares (+inf%) to their portfolio in Q2 2026, for an estimated $139,900,630
VULCAN VALUE PARTNERS, LLC removed 4,485,021 shares (-100.0%) from their portfolio in Q1 2026, for an estimated $180,925,747
GOLDMAN SACHS GROUP INC removed 4,116,328 shares (-44.5%) from their portfolio in Q2 2026, for an estimated $116,574,408

To track hedge funds' stock portfolios, check out Quiver Quantitative's institutional holdings dashboard. You can access data on hedge funds moves and 13F filings through the Quiver Quantitative API 13F endpoint.

$CSGP Congressional Stock Trading

Members of Congress have traded $CSGP stock 2 times in the past 6 months. Of those trades, 1 have been purchases and 1 have been sales.

Here’s a breakdown of recent trading of $CSGP stock by members of Congress over the last 6 months:

REPRESENTATIVE GILBERT RAY CISNEROS, JR. has traded it 2 times. They made 1 purchase worth up to $15,000 on 03/13 and 1 sale worth up to $15,000 on 04/14.

To track congressional stock trading, check out Quiver Quantitative's congressional trading dashboard. You can access data on congressional stock trades through the Quiver Quantitative API Congress trades endpoint.

$CSGP Price Targets

Multiple analysts have issued price targets for $CSGP recently. We have seen 14 analysts offer price targets for $CSGP in the last 6 months, with a median target of $50.0.

Here are some recent targets:

George Tong from Goldman Sachs set a target price of $46.0 on 06/25/2026
Jason Haas from Wells Fargo set a target price of $26.0 on 06/24/2026
Michael Rindos from Benchmark set a target price of $45.0 on 06/04/2026
Heather Balsky from B of A Securities set a target price of $37.0 on 05/19/2026
Brett Huff from Stephens & Co. set a target price of $42.0 on 05/04/2026
Jake Fuller from BTIG set a target price of $55.0 on 04/29/2026
Mayank Tandon from Needham set a target price of $50.0 on 04/29/2026

This article is not financial advice. See Quiver Quantitative's disclaimers for more information. Note that there may be inaccuracies due to mistakes in ticker-mapping, and other anomalies.