Costar Group Inc. – Investors and Politicians Who Own It
CSGP
Investors who own it
5 tracked investors, $593.3M in shares, each from their latest 13F.
| Investor | Value | Share of portfolio |
|---|---|---|
Chuck AkreAkre Capital Management, Q2 2026 | $331.3M | 6.47% |
Polen CapitalQ2 2026 | $248.1M | 2.14% |
Wally WeitzWeitz Investment Management, Q2 2026 | $12M | 0.83% |
| $1.2M | 0.00% | |
Jeremy GranthamGMO (Grantham Mayo Van Otterloo), Q2 2026 | $695.7K | 0.00% |
Politicians who own it
Estimated from annual disclosures and trades; values are rough estimates.
| Politician | Est. value | Share of portfolio |
|---|---|---|
Gilbert Ray Cisneros, Jr.D-CA · House | $39.9K | 0.09% |
William R. KeatingD-MA · House | $3.3K | 0.11% |
Investors buying and selling
| Investor | Action | Shares now |
|---|---|---|
| Polen Capital | New | 6,497,188 |
| Chase Coleman | New | 3,245,109 |
| National Pension Service (Korea) | Reduced −52% | 491,746 |
| Eric Mandelblatt | New | 472,912 |
| Ray Dalio | Added +108% | 879,915 |
| Anand Parekh | Sold out | 0 |
| Andreas Halvorsen | Reduced −7.8% | 1,162,703 |
| Chuck Akre | Added +4.3% | 9,313,880 |
| Wally Weitz | Added +0.4% | 889,875 |
Politicians trading it
Latest Congress trades disclosed under the STOCK Act; amounts are ranges.
| Politician | Action | Traded |
|---|---|---|
Gilbert Ray Cisneros, Jr.D-CA · House | Bought$1K–$15K | Aug 19, 2026disclosed Sep 10, 2026 |
Gilbert Ray Cisneros, Jr.D-CA · House | Sold part$1K–$15K | Apr 14, 2026disclosed May 8, 2026 |
Gilbert Ray Cisneros, Jr.D-CA · House | Bought$1K–$15K | Mar 13, 2026disclosed Apr 7, 2026 |
Gilbert Ray Cisneros, Jr.D-CA · House | Bought$1K–$15K | Jan 28, 2026disclosed Feb 13, 2026 |
Gilbert Ray Cisneros, Jr.D-CA · House | Bought$1K–$15K | Dec 10, 2025disclosed Jan 12, 2026 |
Gilbert Ray Cisneros, Jr.D-CA · House | Bought$1K–$15K | Oct 15, 2025disclosed Nov 18, 2025 |
Gilbert Ray Cisneros, Jr.D-CA · House | Bought$1K–$15K | Sep 30, 2025disclosed Oct 10, 2025 |
Lisa C. McClainSpouseR-MI · House | Sold$1K–$15K | Sep 25, 2025disclosed Oct 22, 2025 |
Gilbert Ray Cisneros, Jr.D-CA · House | Bought$1K–$15K | Sep 22, 2025disclosed Oct 10, 2025 |
Lisa C. McClainSpouseR-MI · House | Bought$1K–$15K | Aug 13, 2025disclosed Sep 12, 2025 |
Gilbert Ray Cisneros, Jr.D-CA · House | Bought$1K–$15K | Jul 31, 2025disclosed Aug 14, 2025 |
Gilbert Ray Cisneros, Jr.D-CA · House | Bought$1K–$15K | Jul 9, 2025disclosed Aug 14, 2025 |
Gilbert Ray Cisneros, Jr.D-CA · House | Bought$1K–$15K | Jun 30, 2025disclosed Jul 10, 2025 |
Gilbert Ray Cisneros, Jr.D-CA · House | Bought$15K–$50K | Jun 27, 2025disclosed Jul 10, 2025 |
Gilbert Ray Cisneros, Jr.D-CA · House | Bought$1K–$15K | Jun 25, 2025disclosed Jul 10, 2025 |
Robert P. Bresnahan, Jr.R-PA · House | Sold$1K–$15K | May 15, 2025disclosed May 31, 2025 |
Jefferson ShreveR-IN · House | Sold$15K–$50K | May 12, 2025disclosed Jun 22, 2025 |
Jefferson ShreveR-IN · House | Bought$15K–$50K | Feb 24, 2025disclosed Mar 9, 2025 |
William R. KeatingD-MA · House | Bought$1K–$15K | Jan 21, 2025disclosed Feb 25, 2025 |
Julie JohnsonJointD-TX · House | Sold$1K–$15K | Jan 15, 2025disclosed Feb 12, 2025 |
Daniel S. GoldmanD-NY · House | Bought$15K–$50K | Apr 10, 2023disclosed May 19, 2023 |
Daniel S. GoldmanD-NY · House | Sold$15K–$50K | Mar 6, 2023disclosed Apr 17, 2023 |
Josh GottheimerJointD-NJ · House | Sold$1K–$15K | Feb 5, 2021disclosed Mar 10, 2021 |
Susie LeeJointD-NV · House | Sold$1K–$15K | Dec 22, 2020disclosed Jan 11, 2021 |
Gilbert Ray Cisneros, Jr.D-CA · House | Sold part$1K–$15K | Oct 7, 2020disclosed Nov 5, 2020 |
Josh GottheimerJointD-NJ · House | Sold part$1K–$15K | Sep 25, 2020disclosed Oct 13, 2020 |
Gilbert Ray Cisneros, Jr.D-CA · House | Sold part$1K–$15K | Sep 23, 2020disclosed Oct 14, 2020 |
Gilbert Ray Cisneros, Jr.D-CA · House | Bought$1K–$15K | Mar 30, 2020disclosed Apr 16, 2020 |
Gilbert Ray Cisneros, Jr.D-CA · House | Bought$15K–$50K | Mar 27, 2020disclosed Apr 16, 2020 |
Gilbert Ray Cisneros, Jr.D-CA · House | Sold part$1K–$15K | Feb 5, 2020disclosed Mar 10, 2020 |
Josh GottheimerJointD-NJ · House | Sold part$1K–$15K | Jan 17, 2020disclosed Feb 10, 2020 |
Josh GottheimerJointD-NJ · House | Sold part$1K–$15K | Nov 22, 2019disclosed Dec 9, 2019 |
Gilbert Ray Cisneros, Jr.D-CA · House | Sold part$1K–$15K | Oct 9, 2019disclosed Nov 15, 2019 |
Gilbert Ray Cisneros, Jr.D-CA · House | Sold part$1K–$15K | Sep 26, 2019disclosed Oct 16, 2019 |
Gilbert Ray Cisneros, Jr.D-CA · House | Sold part$1K–$15K | Sep 10, 2019disclosed Oct 16, 2019 |
Susie LeeJointD-NV · House | Sold$1K–$15K | Apr 23, 2019disclosed May 9, 2019 |