COSTAR GROUP INC (CSGP) Institutional Ownership and Insiders Activity

COSTAR GROUP INC (CSGP) is widely held by institutional investors, with 8 tracked firms reporting positions valued at approximately $979.35M based on SEC Form 13F filings for the quarter ended June 30, 2026.

Akre Capital Management is the largest disclosed holder, reporting approximately $417.45M in CSGP holdings in its latest filing.

Recent insider activity includes 12 tracked Form 4 transactions over the last three months, reflecting ongoing executive and director trading activity.