Costar Group (CSGP) Held by Superinvestors
COSTAR GROUP INC (CSGP) is currently held by 7 superinvestors tracked by InsiderSet, with a combined reported market value of approximately $851.15M based on the latest available SEC Form 13F filings for the quarter ended June 30, 2026.
Akre Capital Management is currently the largest disclosed institutional shareholder of CSGP tracked by InsiderSet, reporting ownership valued at approximately $331.33M in its June 30, 2026 SEC Form 13F filing. Based on current market prices and the latest disclosed share count, the position is now estimated to be worth approximately $347.12M, representing an estimated gain of +4.77% since the filing period.
The top 10 institutional shareholders tracked on this page collectively account for approximately 100% of the total disclosed CSGP value among the investors covered in this analysis. Major shareholders include Akre Capital Management, Polen Capital Management, Meritage Group, and several other long-term asset managers with concentrated positions in COSTAR GROUP INC (CSGP).
This page ranks the largest institutional CSGP shareholders using publicly disclosed SEC Form 13F data, including reported values, estimated current holding values, portfolio allocation percentages, ownership concentration metrics, and historical holding changes across major hedge funds and investment firms.
| Name | Investor/Manager | Portfolio % | Quantity | Reported Balance | Current Estimated Value | Gain/loss Since Filing | Estimated Portfolio Performance |
|---|---|---|---|---|---|---|---|
| Akre Capital Management | Chuck Akre | 6.49% | 11,699,396 | $331,326,895 | $347,121,079 | +$15,794,184 | +4.77% |
| Polen Capital Management | David M. Polen | 2.14% | 8,759,314 | $248,063,762 | $259,888,846 | +$11,825,084 | +4.77% |
| Meritage Group | Nathaniel Simons | 5.89% | 5,394,164 | $152,762,724 | $160,044,846 | +$7,282,122 | +4.77% |
| Bares Capital Management | Brian Bares | 9.54% | 1,226,251 | $103,458,797 | $36,382,867 | -$67,075,930 | -64.83% |
| ShawSpring Partners | Dennis Hong | 5.11% | 339,081 | $13,678,528 | $10,060,533 | -$3,617,995 | -26.45% |
| Sequoia Financial Advisors | 0.01% | 54,883 | $1,554,301 | $1,628,379 | +$74,078 | +4.77% | |
| Hillman Value Fund | Mark A. Hillman | 0.22% | 10,745 | $304,298 | $318,804 | +$14,506 | +4.77% |
Frequently asked questions about CSGP
Who are the largest superinvestors holding CSGP?
The largest superinvestors holding CSGP in the latest SEC Form 13F filings include Akre Capital Management, Polen Capital Management, Meritage Group, Bares Capital Management, and ShawSpring Partners. InsiderSet ranks these superinvestors by their latest reported CSGP position.
What does the CSGP superinvestors page include?
This page tracks CSGP positions reported by a curated group of notable institutional investors and fund managers through SEC Form 13F. COSTAR GROUP INC (CSGP) on this page reflects disclosed 13F holdings among those superinvestors, not every institutional shareholder of the stock.
How many superinvestors hold CSGP?
InsiderSet currently tracks 7 superinvestors reporting CSGP holdings in the latest available 13F data. This is the curated set on this page, not the total number of institutions that own CSGP.
How much CSGP stock do superinvestors hold?
Superinvestors tracked by InsiderSet disclosed approximately $851.15M in CSGP holdings for Q2 2026. This figure is reported 13F value as of the filing period, not necessarily today's market value, and it covers the curated superinvestors on this page rather than every institutional filer.
When were CSGP superinvestor holdings last updated?
The latest CSGP superinvestor holdings on InsiderSet are based on SEC Form 13F filings for the quarter ended June 30, 2026. Form 13F filings are generally reported after the quarter ends, so the holdings shown represent the latest publicly disclosed positions rather than real-time holdings.
Are superinvestor CSGP holdings real-time?
No. Form 13F data is not real-time. It represents positions reported by these superinvestors as of the end of the reporting quarter. A superinvestor may have changed its CSGP position after the reporting date.
Are superinvestors buying or selling CSGP?
Buying and selling can be analyzed by comparing CSGP positions across consecutive 13F reporting periods. InsiderSet's CSGP Ownership Changes page shows institutions that increased, reduced, initiated, or exited positions based on reported 13F holdings. View CSGP ownership changes.
How have superinvestor CSGP holdings changed over time?
InsiderSet tracks CSGP holdings among these superinvestors across multiple 13F reporting periods, so holder counts, reported value, and reported shares can be compared over time.