Costar Group, Inc.
CSGP- Exchange
- Nasdaq
- Industry
- Services-Business Services, NEC
- SEC CIK
- 0001057352
In the last 90 days, Costar Group, Inc. insiders filed 1 open-market purchase and 2 sales; 760 institutions reported holding it in 13F filings for Q2 2026, worth $11.7B in total; superinvestors Akre Capital Management and Weitz Investment Management hold it.
Members of Congress who traded CSGP
Since 2020, newest trade first. Options and trades reported under an earlier ticker are included.
- Trades
- 34
- Filings
- 29
- Members
- 10
- Buys / sells
- 18 / 16
- Estimated volume
- $653.0K
- Sum of range midpoints
| Member | Trades | Buys / sells | Est. volume | Last traded | Last filed |
|---|---|---|---|---|---|
| Gilbert Ray Cisneros, Jr.Democrat · House · CA | 18 | 14 / 4 | $193.0K | Aug 19, 2026 | Sep 10, 2026 |
| Lisa C. McClainRepublican · House · MI | 2 | 1 / 1 | $16.0K | Sep 25, 2025 | Oct 22, 2025 |
| Robert P. Bresnahan, Jr.Republican · House · PA | 1 | 0 / 1 | $8.00K | May 15, 2025 | May 31, 2025 |
| Jefferson ShreveRepublican · House · IN | 2 | 1 / 1 | $65.0K | May 12, 2025 | Jun 22, 2025 |
| William R. KeatingDemocrat · House · MA | 1 | 1 / 0 | $8.00K | Jan 21, 2025 | Feb 25, 2025 |
| Julie JohnsonDemocrat · House · TX | 1 | 0 / 1 | $8.00K | Jan 15, 2025 | Feb 12, 2025 |
| Daniel S. GoldmanDemocrat · House · NY | 2 | 1 / 1 | $65.0K | Apr 10, 2023 | May 19, 2023 |
| Josh GottheimerDemocrat · House · NJ | 3 | 0 / 3 | $24.0K | Feb 5, 2021 | Mar 10, 2021 |
| Susie LeeDemocrat · House · NV | 1 | 0 / 1 | $8.00K | Dec 22, 2020 | Jan 11, 2021 |
| Greg GianforteRepublican · House · MT | 3 | 0 / 3 | $258.0K | Oct 13, 2020 | Nov 9, 2020 |
Trades
Every reported trade in Costar Group, Inc., newest filings first.
| Member | Asset | Type | Owner | Traded | Filed | Delay | Amount | Source |
|---|---|---|---|---|---|---|---|---|
| Gilbert Ray Cisneros, Jr.Democrat · House · CA | CSGPCoStar Group, Inc. - Common Stock | Buy | Self | Aug 19, 2026 | Sep 10, 2026 | 22 days | $1K-$15K | Filing |
| Gilbert Ray Cisneros, Jr.Democrat · House · CA | CSGPCoStar Group, Inc. - Common Stock | Sell (partial) | Self | Apr 14, 2026 | May 8, 2026 | 24 days | $1K-$15K | Filing |
| Gilbert Ray Cisneros, Jr.Democrat · House · CA | CSGPCoStar Group, Inc. - Common Stock | Buy | Self | Mar 13, 2026 | Apr 7, 2026 | 25 days | $1K-$15K | Filing |
| Gilbert Ray Cisneros, Jr.Democrat · House · CA | CSGPCoStar Group, Inc. - Common Stock | Buy | Self | Jan 28, 2026 | Feb 13, 2026 | 16 days | $1K-$15K | Filing |
| Gilbert Ray Cisneros, Jr.Democrat · House · CA | CSGPCoStar Group, Inc. - Common Stock | Buy | Self | Dec 10, 2025 | Jan 12, 2026 | 33 days | $1K-$15K | Filing |
| Gilbert Ray Cisneros, Jr.Democrat · House · CA | CSGPCoStar Group, Inc. - Common Stock | Buy | Self | Oct 15, 2025 | Nov 18, 2025 | 34 days | $1K-$15K | Filing |
| Lisa C. McClainRepublican · House · MI | CSGPCoStar Group, Inc. - Common Stock | Sell | Spouse | Sep 25, 2025 | Oct 22, 2025 | 27 days | $1K-$15K | Filing |
| Gilbert Ray Cisneros, Jr.Democrat · House · CA | CSGPCoStar Group, Inc. - Common Stock | Buy | Self | Sep 30, 2025 | Oct 10, 2025 | 10 days | $1K-$15K | Filing |
| Gilbert Ray Cisneros, Jr.Democrat · House · CA | CSGPCoStar Group, Inc. - Common Stock | Buy | Self | Sep 22, 2025 | Oct 10, 2025 | 18 days | $1K-$15K | Filing |
| Lisa C. McClainRepublican · House · MI | CSGPCoStar Group, Inc. - Common Stock | Buy | Spouse | Aug 13, 2025 | Sep 12, 2025 | 30 days | $1K-$15K | Filing |
| Gilbert Ray Cisneros, Jr.Democrat · House · CA | CSGPCoStar Group, Inc. - Common Stock | Buy | Self | Jul 31, 2025 | Aug 14, 2025 | 14 days | $1K-$15K | Filing |
| Gilbert Ray Cisneros, Jr.Democrat · House · CA | CSGPCoStar Group, Inc. - Common Stock | Buy | Self | Jul 9, 2025 | Aug 14, 2025 | 36 days | $1K-$15K | Filing |
| Gilbert Ray Cisneros, Jr.Democrat · House · CA | CSGPCoStar Group, Inc. - Common Stock | Buy | Self | Jun 27, 2025 | Jul 10, 2025 | 13 days | $15K-$50K | Filing |
| Gilbert Ray Cisneros, Jr.Democrat · House · CA | CSGPCoStar Group, Inc. - Common Stock | Buy | Self | Jun 30, 2025 | Jul 10, 2025 | 10 days | $1K-$15K | Filing |
| Gilbert Ray Cisneros, Jr.Democrat · House · CA | CSGPCoStar Group, Inc. - Common Stock | Buy | Self | Jun 25, 2025 | Jul 10, 2025 | 15 days | $1K-$15K | Filing |
| Jefferson ShreveRepublican · House · IN | CSGPCoStar Group, Inc. - Common Stock | Sell | Self | May 12, 2025 | Jun 22, 2025 | 41 days | $15K-$50K | Filing |
| Robert P. Bresnahan, Jr.Republican · House · PA | CSGPCoStar Group, Inc. - Common Stock | Sell | Self | May 15, 2025 | May 31, 2025 | 16 days | $1K-$15K | Filing |
| Jefferson ShreveRepublican · House · IN | CSGPCoStar Group, Inc. - Common Stock | Buy | Self | Feb 24, 2025 | Mar 9, 2025 | 13 days | $15K-$50K | Filing |
| William R. KeatingDemocrat · House · MA | CSGPCoStar Group, Inc. - Common Stock | Buy | Self | Jan 21, 2025 | Feb 25, 2025 | 35 days | $1K-$15K | Filing |
| Julie JohnsonDemocrat · House · TX | CSGPCoStar Group, Inc. - Common Stock | Sell | Joint | Jan 15, 2025 | Feb 12, 2025 | 28 days | $1K-$15K | Filing |
| Daniel S. GoldmanDemocrat · House · NY | CSGPCoStar Group, Inc. | Buy | Self | Apr 10, 2023 | May 19, 2023 | 39 days | $15K-$50K | Filing |
| Daniel S. GoldmanDemocrat · House · NY | CSGPCoStar Group, Inc. | Sell | Self | Mar 6, 2023 | Apr 17, 2023 | 42 days | $15K-$50K | Filing |
| Josh GottheimerDemocrat · House · NJ | CSGPCoStar Group, Inc. | Sell | Joint | Feb 5, 2021 | Mar 10, 2021 | 33 days | $1K-$15K | Filing |
| Susie LeeDemocrat · House · NV | CSGPCoStar Group, Inc. | Sell | Joint | Dec 22, 2020 | Jan 11, 2021 | 20 days | $1K-$15K | Filing |
| Greg GianforteRepublican · House · MT | CSGPCoStar Group, Inc. | Sell (partial) | Joint | Oct 13, 2020 | Nov 9, 2020 | 27 days | $1K-$15K | Filing |
| Gilbert Ray Cisneros, Jr.Democrat · House · CA | CSGPCoStar Group, Inc. | Sell (partial) | Self | Oct 7, 2020 | Nov 5, 2020 | 29 days | $1K-$15K | Filing |
| Greg GianforteRepublican · House · MT | CSGPCoStar Group, Inc. | Sell (partial) | Joint | Sep 24, 2020 | Oct 19, 2020 | 25 days | $100K-$250K | Filing |
| Gilbert Ray Cisneros, Jr.Democrat · House · CA | CSGPCoStar Group, Inc. | Sell (partial) | Self | Sep 23, 2020 | Oct 14, 2020 | 21 days | $1K-$15K | Filing |
| Josh GottheimerDemocrat · House · NJ | CSGPCoStar Group, Inc. | Sell (partial) | Joint | Sep 25, 2020 | Oct 13, 2020 | 18 days | $1K-$15K | Filing |
| Greg GianforteRepublican · House · MT | CSGPCoStar Group, Inc. | Sell (partial) | Joint | May 7, 2020 | May 12, 2020 | 5 days | $50K-$100K | Filing |
| Gilbert Ray Cisneros, Jr.Democrat · House · CA | CSGPCoStar Group, Inc. | Buy | Self | Mar 27, 2020 | Apr 16, 2020 | 20 days | $15K-$50K | Filing |
| Gilbert Ray Cisneros, Jr.Democrat · House · CA | CSGPCoStar Group, Inc. | Buy | Self | Mar 30, 2020 | Apr 16, 2020 | 17 days | $1K-$15K | Filing |
| Gilbert Ray Cisneros, Jr.Democrat · House · CA | CSGPCoStar Group, Inc. | Sell (partial) | Self | Feb 5, 2020 | Mar 10, 2020 | 34 days | $1K-$15K | Filing |
| Josh GottheimerDemocrat · House · NJ | CSGPCoStar Group, Inc. | Sell (partial) | Joint | Jan 17, 2020 | Feb 10, 2020 | 24 days | $1K-$15K | Filing |
Source: U.S. House Clerk and Senate Office of Public Records (eFD). Amounts are the ranges filers report.