Stock Analysis

CoStar Group Insiders Sell US$8.6m Of Stock, Possibly Signalling Caution

NasdaqGS:CSGP
Source: Shutterstock

In the last year, many CoStar Group, Inc. (NASDAQ:CSGP) insiders sold a substantial stake in the company which may have sparked shareholders' attention. Knowing whether insiders are buying is usually more helpful when evaluating insider transactions, as insider selling can have various explanations. However, when multiple insiders sell stock over a specific duration, shareholders should take notice as that could possibly be a red flag.

While insider transactions are not the most important thing when it comes to long-term investing, logic dictates you should pay some attention to whether insiders are buying or selling shares.

Advertisement

The Last 12 Months Of Insider Transactions At CoStar Group

Over the last year, we can see that the biggest insider sale was by the insider, Michael Klein, for US$5.4m worth of shares, at about US$74.69 per share. That means that an insider was selling shares at slightly below the current price (US$79.65). As a general rule we consider it to be discouraging when insiders are selling below the current price, because it suggests they were happy with a lower valuation. However, while insider selling is sometimes discouraging, it's only a weak signal. It is worth noting that this sale was only 3.6% of Michael Klein's holding.

All up, insiders sold more shares in CoStar Group than they bought, over the last year. You can see the insider transactions (by companies and individuals) over the last year depicted in the chart below. By clicking on the graph below, you can see the precise details of each insider transaction!

See our latest analysis for CoStar Group

insider-trading-volume
NasdaqGS:CSGP Insider Trading Volume June 22nd 2025

I will like CoStar Group better if I see some big insider buys. While we wait, check out this free list of undervalued and small cap stocks with considerable, recent, insider buying.

CoStar Group Insiders Are Selling The Stock

The last quarter saw substantial insider selling of CoStar Group shares. In total, President of Marketplaces Frederick Saint sold US$2.0m worth of shares in that time, and we didn't record any purchases whatsoever. Overall this makes us a bit cautious, but it's not the be all and end all.

Does CoStar Group Boast High Insider Ownership?

For a common shareholder, it is worth checking how many shares are held by company insiders. Usually, the higher the insider ownership, the more likely it is that insiders will be incentivised to build the company for the long term. CoStar Group insiders own 1.3% of the company, currently worth about US$421m based on the recent share price. Most shareholders would be happy to see this sort of insider ownership, since it suggests that management incentives are well aligned with other shareholders.

So What Do The CoStar Group Insider Transactions Indicate?

An insider sold stock recently, but they haven't been buying. Despite some insider buying, the longer term picture doesn't make us feel much more positive. It is good to see high insider ownership, but the insider selling leaves us cautious. So these insider transactions can help us build a thesis about the stock, but it's also worthwhile knowing the risks facing this company. Case in point: We've spotted 2 warning signs for CoStar Group you should be aware of.

If you would prefer to check out another company -- one with potentially superior financials -- then do not miss this free list of interesting companies, that have HIGH return on equity and low debt.

For the purposes of this article, insiders are those individuals who report their transactions to the relevant regulatory body. We currently account for open market transactions and private dispositions of direct interests only, but not derivative transactions or indirect interests.

New: AI Stock Screener & Alerts

Our new AI Stock Screener scans the market every day to uncover opportunities.

• Dividend Powerhouses (3%+ Yield)
• Undervalued Small Caps with Insider Buying
• High growth Tech and AI Companies

Or build your own from over 50 metrics.

Explore Now for Free

Have feedback on this article? Concerned about the content? Get in touch with us directly. Alternatively, email editorial-team (at) simplywallst.com.

This article by Simply Wall St is general in nature. We provide commentary based on historical data and analyst forecasts only using an unbiased methodology and our articles are not intended to be financial advice. It does not constitute a recommendation to buy or sell any stock, and does not take account of your objectives, or your financial situation. We aim to bring you long-term focused analysis driven by fundamental data. Note that our analysis may not factor in the latest price-sensitive company announcements or qualitative material. Simply Wall St has no position in any stocks mentioned.