Congress Trades in CoStar Group, Inc. (CSGP)
6 members of Congress have disclosed trading CSGP.
6 members of Congress have disclosed trading CoStar Group, Inc. (CSGP), with 15 transactions in total — 11 purchases and 4 sales worth an estimated $193,500 at range midpoints, leaning heavily toward buying. The most active CSGP trader is Gilbert Cisneros (6 disclosures). The most recent disclosed CSGP trade was on Sep 30, 2025. Across the 5 disclosed CSGP purchases we can price, the average return since disclosure is −63.8% (information only, not advice). See our full CSGP fundamentals page for price, valuation and a return calculator.
Corporate insiders in CSGP
It's not just Congress — here's what CSGP's own executives and directors have done with the stock recently, from SEC Form 4 filings.
| Date | Insider | Role | Type | Shares | Value |
|---|---|---|---|---|---|
| May 1, 2026 | Florance Andrew C | President and CEO | Buy | 68,330 | $2.4M |
| May 1, 2026 | Florance Andrew C | President and CEO | Buy | 3,100 | $111,042 |
Every disclosed CSGP trade
| Disclosed | Politician | Type | Amount | Traded | |
|---|---|---|---|---|---|
| Oct 8, 2025 | Gilbert Cisneros D | Purchase | $1,001 - $15,000 | Sep 30, 2025 | filing ↗ |
| Aug 13, 2025 | Gilbert Cisneros D | Purchase | $1,001 - $15,000 | Jul 9, 2025 | filing ↗ |
| Jul 8, 2025 | Gilbert Cisneros D | Purchase | $15,001 - $50,000 | Jun 27, 2025 | filing ↗ |
| Jul 8, 2025 | Gilbert Cisneros D | Purchase | $1,001 - $15,000 | Jun 25, 2025 | filing ↗ |
| Feb 24, 2025 | William R. Keating D | Purchase | $1,001 - $15,000 | Jan 21, 2025 | filing ↗ |
| May 3, 2023 | Daniel Goldman | Purchase | $15,001 - $50,000 | Apr 10, 2023 | filing ↗ |
| Mar 5, 2021 | Josh Gottheimer D | Sale | $1,001 - $15,000 | Feb 5, 2021 | filing ↗ |
| Jan 1, 2021 | Susie Lee D | Sale | $1,001 - $15,000 | Dec 22, 2020 | filing ↗ |
| Apr 15, 2020 | Gilbert Cisneros D | Purchase | $1,001 - $15,000 | Mar 30, 2020 | filing ↗ |
| Apr 15, 2020 | Gilbert Cisneros D | Purchase | $15,001 - $50,000 | Mar 27, 2020 | filing ↗ |
| May 1, 2019 | Susie Lee D | Sale | $1,001 - $15,000 | Apr 23, 2019 | filing ↗ |
| Sep 25, 2018 | Josh Gottheimer D | Purchase | $1,001 - $15,000 | Jun 21, 2018 | filing ↗ |
| Oct 2, 2017 | Lamar Smith R | Purchase | $1,001 - $15,000 | Sep 29, 2017 | filing ↗ |
| Jul 1, 2015 | Lamar Smith R | Sale | $1,001 - $15,000 | Jun 3, 2015 | filing ↗ |
| May 6, 2014 | Lamar Smith R | Purchase | $1,001 - $15,000 | Apr 24, 2014 | filing ↗ |
Most active CSGP traders in Congress
Gilbert Cisneros
Democrat
6 trades
Lamar Smith
Republican
3 trades
Josh Gottheimer
Democrat
2 trades
Susie Lee
Democrat
2 trades
William R. Keating
Democrat
1 trade
DG
Daniel Goldman
1 trade
Source: US House Clerk Periodic Transaction Reports. Amounts are disclosed as ranges; estimates use range midpoints. Data may be delayed or contain filer errors. Updated Jun 29, 2026. Not investment advice.