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.
Politicians who traded CSGP
Since 2020, newest trade first. Shares and options by default, including trades reported under an earlier ticker.
- Trades
- 34
- Filings
- 29
- Politicians
- 10
- Buys / sells
- 18 / 16
- Estimated volume
- $653.0K
- Sum of range midpoints
| Politician | Trades | Buys / sells | Est. volume | Last traded | Last filed |
|---|---|---|---|---|---|
 Gilbert Ray Cisneros, Jr. House · CA | 18 | 14 / 4 | $193.0K | Aug 19, 2026 | Sep 10, 2026 |
 Lisa C. McClain House · MI | 2 | 1 / 1 | $16.0K | Sep 25, 2025 | Oct 22, 2025 |
 Robert P. Bresnahan, Jr. House · PA | 1 | 0 / 1 | $8.00K | May 15, 2025 | May 31, 2025 |
 Jefferson Shreve House · IN | 2 | 1 / 1 | $65.0K | May 12, 2025 | Jun 22, 2025 |
 William R. Keating House · MA | 1 | 1 / 0 | $8.00K | Jan 21, 2025 | Feb 25, 2025 |
 Julie Johnson House · TX | 1 | 0 / 1 | $8.00K | Jan 15, 2025 | Feb 12, 2025 |
 Daniel S. Goldman House · NY | 2 | 1 / 1 | $65.0K | Apr 10, 2023 | May 19, 2023 |
 Josh Gottheimer House · NJ | 3 | 0 / 3 | $24.0K | Feb 5, 2021 | Mar 10, 2021 |
 Susie Lee House · NV | 1 | 0 / 1 | $8.00K | Dec 22, 2020 | Jan 11, 2021 |
 Greg Gianforte House · MT | 3 | 0 / 3 | $258.0K | Oct 13, 2020 | Nov 9, 2020 |
Trades
Reported trades in Costar Group, Inc., newest filings first.
| Politician | Asset | Type | Owner | Traded | Filed | Delay | Amount | Source |
|---|---|---|---|---|---|---|---|---|
Gilbert Ray Cisneros, Jr. House · CA | CSGPCoStar Group, Inc. - Common Stock | Buy | Self | Aug 19, 2026 | Sep 10, 2026 | 22 days | $1K-$15K | Filing |
Gilbert Ray Cisneros, Jr. 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. House · CA | CSGPCoStar Group, Inc. - Common Stock | Buy | Self | Mar 13, 2026 | Apr 7, 2026 | 25 days | $1K-$15K | Filing |
Gilbert Ray Cisneros, Jr. House · CA | CSGPCoStar Group, Inc. - Common Stock | Buy | Self | Jan 28, 2026 | Feb 13, 2026 | 16 days | $1K-$15K | Filing |
Gilbert Ray Cisneros, Jr. House · CA | CSGPCoStar Group, Inc. - Common Stock | Buy | Self | Dec 10, 2025 | Jan 12, 2026 | 33 days | $1K-$15K | Filing |
Gilbert Ray Cisneros, Jr. House · CA | CSGPCoStar Group, Inc. - Common Stock | Buy | Self | Oct 15, 2025 | Nov 18, 2025 | 34 days | $1K-$15K | Filing |
Lisa C. McClain House · MI | CSGPCoStar Group, Inc. - Common Stock | Sell | Spouse | Sep 25, 2025 | Oct 22, 2025 | 27 days | $1K-$15K | Filing |
Gilbert Ray Cisneros, Jr. House · CA | CSGPCoStar Group, Inc. - Common Stock | Buy | Self | Sep 30, 2025 | Oct 10, 2025 | 10 days | $1K-$15K | Filing |
Gilbert Ray Cisneros, Jr. House · CA | CSGPCoStar Group, Inc. - Common Stock | Buy | Self | Sep 22, 2025 | Oct 10, 2025 | 18 days | $1K-$15K | Filing |
Lisa C. McClain House · MI | CSGPCoStar Group, Inc. - Common Stock | Buy | Spouse | Aug 13, 2025 | Sep 12, 2025 | 30 days | $1K-$15K | Filing |
Gilbert Ray Cisneros, Jr. House · CA | CSGPCoStar Group, Inc. - Common Stock | Buy | Self | Jul 31, 2025 | Aug 14, 2025 | 14 days | $1K-$15K | Filing |
Gilbert Ray Cisneros, Jr. House · CA | CSGPCoStar Group, Inc. - Common Stock | Buy | Self | Jul 9, 2025 | Aug 14, 2025 | 36 days | $1K-$15K | Filing |
Gilbert Ray Cisneros, Jr. House · CA | CSGPCoStar Group, Inc. - Common Stock | Buy | Self | Jun 27, 2025 | Jul 10, 2025 | 13 days | $15K-$50K | Filing |
Gilbert Ray Cisneros, Jr. House · CA | CSGPCoStar Group, Inc. - Common Stock | Buy | Self | Jun 30, 2025 | Jul 10, 2025 | 10 days | $1K-$15K | Filing |
Gilbert Ray Cisneros, Jr. House · CA | CSGPCoStar Group, Inc. - Common Stock | Buy | Self | Jun 25, 2025 | Jul 10, 2025 | 15 days | $1K-$15K | Filing |
Jefferson Shreve House · IN | CSGPCoStar Group, Inc. - Common Stock | Sell | Self | May 12, 2025 | Jun 22, 2025 | 41 days | $15K-$50K | Filing |
Robert P. Bresnahan, Jr. House · PA | CSGPCoStar Group, Inc. - Common Stock | Sell | Self | May 15, 2025 | May 31, 2025 | 16 days | $1K-$15K | Filing |
Jefferson Shreve House · IN | CSGPCoStar Group, Inc. - Common Stock | Buy | Self | Feb 24, 2025 | Mar 9, 2025 | 13 days | $15K-$50K | Filing |
William R. Keating House · MA | CSGPCoStar Group, Inc. - Common Stock | Buy | Self | Jan 21, 2025 | Feb 25, 2025 | 35 days | $1K-$15K | Filing |
Julie Johnson House · TX | CSGPCoStar Group, Inc. - Common Stock | Sell | Joint | Jan 15, 2025 | Feb 12, 2025 | 28 days | $1K-$15K | Filing |
Daniel S. Goldman House · NY | CSGPCoStar Group, Inc. | Buy | Self | Apr 10, 2023 | May 19, 2023 | 39 days | $15K-$50K | Filing |
Daniel S. Goldman House · NY | CSGPCoStar Group, Inc. | Sell | Self | Mar 6, 2023 | Apr 17, 2023 | 42 days | $15K-$50K | Filing |
Josh Gottheimer House · NJ | CSGPCoStar Group, Inc. | Sell | Joint | Feb 5, 2021 | Mar 10, 2021 | 33 days | $1K-$15K | Filing |
Susie Lee House · NV | CSGPCoStar Group, Inc. | Sell | Joint | Dec 22, 2020 | Jan 11, 2021 | 20 days | $1K-$15K | Filing |
Greg Gianforte House · MT | CSGPCoStar Group, Inc. | Sell (partial) | Joint | Oct 13, 2020 | Nov 9, 2020 | 27 days | $1K-$15K | Filing |
Gilbert Ray Cisneros, Jr. House · CA | CSGPCoStar Group, Inc. | Sell (partial) | Self | Oct 7, 2020 | Nov 5, 2020 | 29 days | $1K-$15K | Filing |
Greg Gianforte House · MT | CSGPCoStar Group, Inc. | Sell (partial) | Joint | Sep 24, 2020 | Oct 19, 2020 | 25 days | $100K-$250K | Filing |
Gilbert Ray Cisneros, Jr. House · CA | CSGPCoStar Group, Inc. | Sell (partial) | Self | Sep 23, 2020 | Oct 14, 2020 | 21 days | $1K-$15K | Filing |
Josh Gottheimer House · NJ | CSGPCoStar Group, Inc. | Sell (partial) | Joint | Sep 25, 2020 | Oct 13, 2020 | 18 days | $1K-$15K | Filing |
Greg Gianforte House · MT | CSGPCoStar Group, Inc. | Sell (partial) | Joint | May 7, 2020 | May 12, 2020 | 5 days | $50K-$100K | Filing |
Gilbert Ray Cisneros, Jr. House · CA | CSGPCoStar Group, Inc. | Buy | Self | Mar 27, 2020 | Apr 16, 2020 | 20 days | $15K-$50K | Filing |
Gilbert Ray Cisneros, Jr. House · CA | CSGPCoStar Group, Inc. | Buy | Self | Mar 30, 2020 | Apr 16, 2020 | 17 days | $1K-$15K | Filing |
Gilbert Ray Cisneros, Jr. House · CA | CSGPCoStar Group, Inc. | Sell (partial) | Self | Feb 5, 2020 | Mar 10, 2020 | 34 days | $1K-$15K | Filing |
Josh Gottheimer 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. Profiles, committees and photos: the unitedstates project (public domain). District maps: U.S. Census Bureau.