CSGP

Costar Group Inc

5 super-investor ownerscombined $613Mlargest position 6.5%

2 EXIT

5 of the 83 super-investors we track hold CSGP, worth a combined $613M per their latest 13F filings. The largest position: Chuck Akre at 6.5% of their portfolio. This quarter the cohort logged 0 buys and 2 sells on the name. Conviction score: 28 of 100 (how strongly the cohort backs it) — ranked #425 of 742 stocks. Conviction easing: 2 fewer super-investors hold it than in 2026Q1.

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Why super-investors own CSGP

CSGP is held by 5 super-investors in our cohort, with a combined position value of $613M. The highest-conviction owner is Chuck Akre at 6.5% of their portfolio. Cohort ownership has shrunk from 9 to 5 over the last four quarters — net interest is fading. This quarter the cohort registered 2 exited.

AI-synthesized from 13F filings. Not investment advice.

Cohort owners over time

2016Q3 → 2026Q2

How many of the cohort members held this stock each quarter.

Now: 5

Peak: 10

Owners (5) · click any column to sort

#↑	Manager	% Port.	History	Value	Shares
1	Chuck Akre	6.5%	27q	$331M	11,699,396
2	Polen Capital Management	2.1%	7q	$248M	8,759,314
3	Joel Greenblatt	<0.1%	39q	$21M	741,898
4	Wallace Weitz	0.8%	26q	$12M	423,181
5	Hillman Capital Management	0.2%	2q	$304K	10,745