By CapitalSnitch Research Desk · updated Oct 11, 2026 · data from SEC filings and official Congress disclosures
CSGP insiders were on both sides of the trade this year. Buys came to roughly $8.5 million (four buyers), sales to $534,000 (two sellers).
Biggest single buyer: FLORANCE ANDREW C, CEO, with roughly $2.5 million. That includes C-suite money, which tends to get the most attention.
Members of Congress reported 20 trades in CSGP over the past two years (six members). Looking at the quarterly pattern: 3 quarters in a row of net buying by insiders. Insiders bought in 3 of the last 7 full quarters. On the institutional side, 757 funds reported holding CSGP at the end of Q2 2026, and funds were split between buying and selling.
Are insiders buying or selling CSGP stock?
In the last 12 months Costar Group, Inc. insiders made open-market purchases worth about $8.5 million and sales worth about $534,000. Data comes from SEC Form 4 filings, updated every 30 minutes on CapitalSnitch.
When was the last insider trade in CSGP?
The most recent open-market insider trade in CSGP was filed on 2026-08-10.
How many institutions own CSGP?
757 investment managers reported holding CSGP in SEC Form 13F filings for Q2 2026.
Has any member of Congress traded CSGP?
Yes. Members of Congress reported 20 trades in CSGP over the past two years. The full list is free on CapitalSnitch.
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Public-record data for research and education, not investment advice. Insider sales are often pre-planned (10b5-1).
Congress data: Data derived from public disclosures filed under the Ethics in Government Act and the STOCK Act, republished free for public transparency and news reporting. Disclosures may lag the trade by 45 days or more and show amounts only as ranges. This data may not be used for credit rating, loan underwriting, solicitation of money (political, charitable or other), direct-mail or commercial targeting (5 U.S.C. 13107).