Costar Group

At a glance

Costar Group reported 2025 revenue of $3.25B, up 18.7% from $2.74B in 2024. Over 4 years since 2021 ($1.94B), that is growth of about 13.7% a year. Operating margin was -2.2%, down from 22.2% in 2021. 2025 was the highest revenue year in this period. The company posted a loss in 2025.

In the last 12 months 6 insiders reported 6 open-market purchases ($8.5M) and 4 sales ($534K). None of the sales were flagged as 10b5-1 plan trades. The largest was a purchase of $2.5M by President and CEO Andrew C Florance on May 4, 2026. Net, insiders were buyers of $8M.

Costar Group filed 11 current reports (Form 8-K) in the last 12 months, most often for officer or director change (5), results of operations (4), material agreement (2) and regulation fd disclosure (1). The latest officer or director change was reported on Jul 13, 2026. It reported a material agreement or a completed acquisition or disposal 2 times.

2 of the 20 investors tracked here held Costar Group at the last quarter end, worth $332.5M combined. It is the largest weight for Akre Capital Management (6.5% of its portfolio), followed by National Pension Service (Korea) (0%). Added: Akre Capital Management. Reduced: National Pension Service (Korea).

Annual results

Fiscal year ends Dec 31 · incorporated in DE

Tracked investors holding (13F)

Weight is the share of each investor's portfolio, as of the quarter end.