President Frederick G. Saint buys $906,600 of Costar Group, Inc. (CSGP)

Frederick G. Saint, president of Costar Group, Inc., bought 20,000 shares on the open market on March 2, 2026 at an average of $45.33 a share, for a total of $906,600. The purchase was reported to the SEC on Form 4 on March 3, 2026.

It raised their holding by 7.7%, to 279,851 shares.

The purchase came after a fall: Costar Group, Inc. stock was down 33.8% over the 13 weeks before.

3 other insiders also bought at least $10,000 of CSGP within 30 days, which makes this a cluster buy.

In the 12 months up to this filing, Costar Group, Inc. insiders reported 3 open-market purchases and 0 sales.

WallStPal Score: 65 out of 100, because of a large purchase; 3 other insiders also bought; the stock had fallen 33.8% in the 13 weeks before; bought by a top executive.

What happened next: after 1 month the stock was down 9.8% (2.2 points worse than the S&P 500); after 6 months the stock was down 28.9% (41.1 points worse than the S&P 500). Based on weekly prices from the week of the purchase.

Our read

The first open-market purchase by Frederick G. Saint in our records, made after a 33.8% fall in 13 weeks, a setup where insider buying has historically mattered most. A single purchase is a data point, not a forecast: insiders can be early, and sometimes simply wrong.

Source: SEC Form 4 filing ↗. This story was written automatically from the filing and weekly price data. Information, not investment advice.

Examples

Big insider purchases have made news before. In January 2016, with bank stocks falling, JPMorgan Chase CEO Jamie Dimon bought 500,000 JPMorgan shares, about $26 million of his own money, and the purchase was widely reported as a sign of confidence.

Explain it like I'm 13

Frederick G. Saint helps run Costar Group, Inc.. Spending $906,600 of their own money on the company's stock is like a coach buying a big stack of tickets to their own team's games: it suggests they think the team will do well. It is not a promise, and insiders can be wrong.

More: all CSGP insider trades · Frederick G. Saint's track record