Costar Group Inc (CSGP) SEC 13F Holdings (Q2 2026): Institutional Buyers & Sellers

CSGP ranks #705 out of 37501 tracked stocks by institutional interest — one of the most closely watched names in our coverage.

CSGP is a top-conviction position for Akre Capital Management LLC — at 6.5% of their entire disclosed 13F portfolio, it's one of their largest single bets, not just a passing allocation.

The largest dollar stake in CSGP belongs to Vanguard Portfolio Management LLC, but the position matters far more to Akre Capital Management LLC, who has 6.5% of their own portfolio riding on it — a reminder that the biggest holder by size and the holder with the biggest bet aren't always the same fund.

Cliff Asness has added to its CSGP position for two straight quarters, increasing it by $214.3M to reach $239.2M today.

BlackRock has trimmed its CSGP position for two straight quarters, cutting it by $1.3B while still holding $957.6M.

CSGP is down 2.3% today, but institutions show net buying of $943.3M this quarter — a divergence between today's price move and the underlying institutional flow.

CSGP posted net income of $73.6M over the trailing twelve months, and currently trades at a P/E of 178.7.

• Profitable — net income of $73.6M over the trailing twelve months
• Revenue grew 22.0% year over year
• Net income declined year over year, from $104.1M to $73.6M
• Generated $430.0M in positive operating cash flow
• Current ratio of 2.84x — enough short-term assets to cover short-term liabilities
• Liabilities run 0.21x equity — within a conventional range