NASDAQ: CSGPCoStar Group Inc

Real EstateMkt Cap $13.15BCongress ownership rank #302

CoStar Group Inc Congressional Trading

According to U.S. congressional financial disclosures filed under the STOCK Act, members of Congress have reported 81 trades in CoStar Group Inc (NASDAQ: CSGP) since 2014, across 13 members, worth an estimated $1.3M in disclosed volume (the midpoint of the dollar ranges members report, not exact amounts). 42 buys against 39 sells, a modestly buy-led skew, with Democratic members responsible for 81% of the trades and Republican members 19%. The most recent disclosure shown was filed April 2026, and Gilbert Cisneros has filed the most CSGP transactions among those shown, with 12. Other recent filers include Ro Khanna and Lisa Mcclain. One notable disclosed move was a purchase by Gilbert Cisneros on July 31, 2025, down 64.9% since. These figures are drawn from public House and Senate periodic transaction reports and reflect what members were required to disclose, not the current market value of any position. For the full record, including the month-by-month buy and sell timeline, the party breakdown, top buyers and sellers, and every individual filing, see the CoStar Group Inc (CSGP) stock overview and the complete trade table below.