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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
Members of Congress who traded CSGP
MemberTradesBuys / sellsEst. volumeLast tradedLast filed
Gilbert Ray Cisneros, Jr.Democrat · House · CA1814 / 4$193.0KAug 19, 2026Sep 10, 2026
Lisa C. McClainRepublican · House · MI21 / 1$16.0KSep 25, 2025Oct 22, 2025
Robert P. Bresnahan, Jr.Republican · House · PA10 / 1$8.00KMay 15, 2025May 31, 2025
Jefferson ShreveRepublican · House · IN21 / 1$65.0KMay 12, 2025Jun 22, 2025
William R. KeatingDemocrat · House · MA11 / 0$8.00KJan 21, 2025Feb 25, 2025
Julie JohnsonDemocrat · House · TX10 / 1$8.00KJan 15, 2025Feb 12, 2025
Daniel S. GoldmanDemocrat · House · NY21 / 1$65.0KApr 10, 2023May 19, 2023
Josh GottheimerDemocrat · House · NJ30 / 3$24.0KFeb 5, 2021Mar 10, 2021
Susie LeeDemocrat · House · NV10 / 1$8.00KDec 22, 2020Jan 11, 2021
Greg GianforteRepublican · House · MT30 / 3$258.0KOct 13, 2020Nov 9, 2020

Trades

Every reported trade in Costar Group, Inc., newest filings first.

Congress trades
MemberAssetTypeOwnerTradedFiledDelayAmountSource
Gilbert Ray Cisneros, Jr.Democrat · House · CACSGPCoStar Group, Inc. - Common StockBuySelfAug 19, 2026Sep 10, 202622 days$1K-$15KFiling
Gilbert Ray Cisneros, Jr.Democrat · House · CACSGPCoStar Group, Inc. - Common StockSell (partial)SelfApr 14, 2026May 8, 202624 days$1K-$15KFiling
Gilbert Ray Cisneros, Jr.Democrat · House · CACSGPCoStar Group, Inc. - Common StockBuySelfMar 13, 2026Apr 7, 202625 days$1K-$15KFiling
Gilbert Ray Cisneros, Jr.Democrat · House · CACSGPCoStar Group, Inc. - Common StockBuySelfJan 28, 2026Feb 13, 202616 days$1K-$15KFiling
Gilbert Ray Cisneros, Jr.Democrat · House · CACSGPCoStar Group, Inc. - Common StockBuySelfDec 10, 2025Jan 12, 202633 days$1K-$15KFiling
Gilbert Ray Cisneros, Jr.Democrat · House · CACSGPCoStar Group, Inc. - Common StockBuySelfOct 15, 2025Nov 18, 202534 days$1K-$15KFiling
Lisa C. McClainRepublican · House · MICSGPCoStar Group, Inc. - Common StockSellSpouseSep 25, 2025Oct 22, 202527 days$1K-$15KFiling
Gilbert Ray Cisneros, Jr.Democrat · House · CACSGPCoStar Group, Inc. - Common StockBuySelfSep 30, 2025Oct 10, 202510 days$1K-$15KFiling
Gilbert Ray Cisneros, Jr.Democrat · House · CACSGPCoStar Group, Inc. - Common StockBuySelfSep 22, 2025Oct 10, 202518 days$1K-$15KFiling
Lisa C. McClainRepublican · House · MICSGPCoStar Group, Inc. - Common StockBuySpouseAug 13, 2025Sep 12, 202530 days$1K-$15KFiling
Gilbert Ray Cisneros, Jr.Democrat · House · CACSGPCoStar Group, Inc. - Common StockBuySelfJul 31, 2025Aug 14, 202514 days$1K-$15KFiling
Gilbert Ray Cisneros, Jr.Democrat · House · CACSGPCoStar Group, Inc. - Common StockBuySelfJul 9, 2025Aug 14, 202536 days$1K-$15KFiling
Gilbert Ray Cisneros, Jr.Democrat · House · CACSGPCoStar Group, Inc. - Common StockBuySelfJun 27, 2025Jul 10, 202513 days$15K-$50KFiling
Gilbert Ray Cisneros, Jr.Democrat · House · CACSGPCoStar Group, Inc. - Common StockBuySelfJun 30, 2025Jul 10, 202510 days$1K-$15KFiling
Gilbert Ray Cisneros, Jr.Democrat · House · CACSGPCoStar Group, Inc. - Common StockBuySelfJun 25, 2025Jul 10, 202515 days$1K-$15KFiling
Jefferson ShreveRepublican · House · INCSGPCoStar Group, Inc. - Common StockSellSelfMay 12, 2025Jun 22, 202541 days$15K-$50KFiling
Robert P. Bresnahan, Jr.Republican · House · PACSGPCoStar Group, Inc. - Common StockSellSelfMay 15, 2025May 31, 202516 days$1K-$15KFiling
Jefferson ShreveRepublican · House · INCSGPCoStar Group, Inc. - Common StockBuySelfFeb 24, 2025Mar 9, 202513 days$15K-$50KFiling
William R. KeatingDemocrat · House · MACSGPCoStar Group, Inc. - Common StockBuySelfJan 21, 2025Feb 25, 202535 days$1K-$15KFiling
Julie JohnsonDemocrat · House · TXCSGPCoStar Group, Inc. - Common StockSellJointJan 15, 2025Feb 12, 202528 days$1K-$15KFiling
Daniel S. GoldmanDemocrat · House · NYCSGPCoStar Group, Inc.BuySelfApr 10, 2023May 19, 202339 days$15K-$50KFiling
Daniel S. GoldmanDemocrat · House · NYCSGPCoStar Group, Inc.SellSelfMar 6, 2023Apr 17, 202342 days$15K-$50KFiling
Josh GottheimerDemocrat · House · NJCSGPCoStar Group, Inc.SellJointFeb 5, 2021Mar 10, 202133 days$1K-$15KFiling
Susie LeeDemocrat · House · NVCSGPCoStar Group, Inc.SellJointDec 22, 2020Jan 11, 202120 days$1K-$15KFiling
Greg GianforteRepublican · House · MTCSGPCoStar Group, Inc.Sell (partial)JointOct 13, 2020Nov 9, 202027 days$1K-$15KFiling
Gilbert Ray Cisneros, Jr.Democrat · House · CACSGPCoStar Group, Inc.Sell (partial)SelfOct 7, 2020Nov 5, 202029 days$1K-$15KFiling
Greg GianforteRepublican · House · MTCSGPCoStar Group, Inc.Sell (partial)JointSep 24, 2020Oct 19, 202025 days$100K-$250KFiling
Gilbert Ray Cisneros, Jr.Democrat · House · CACSGPCoStar Group, Inc.Sell (partial)SelfSep 23, 2020Oct 14, 202021 days$1K-$15KFiling
Josh GottheimerDemocrat · House · NJCSGPCoStar Group, Inc.Sell (partial)JointSep 25, 2020Oct 13, 202018 days$1K-$15KFiling
Greg GianforteRepublican · House · MTCSGPCoStar Group, Inc.Sell (partial)JointMay 7, 2020May 12, 20205 days$50K-$100KFiling
Gilbert Ray Cisneros, Jr.Democrat · House · CACSGPCoStar Group, Inc.BuySelfMar 27, 2020Apr 16, 202020 days$15K-$50KFiling
Gilbert Ray Cisneros, Jr.Democrat · House · CACSGPCoStar Group, Inc.BuySelfMar 30, 2020Apr 16, 202017 days$1K-$15KFiling
Gilbert Ray Cisneros, Jr.Democrat · House · CACSGPCoStar Group, Inc.Sell (partial)SelfFeb 5, 2020Mar 10, 202034 days$1K-$15KFiling
Josh GottheimerDemocrat · House · NJCSGPCoStar Group, Inc.Sell (partial)JointJan 17, 2020Feb 10, 202024 days$1K-$15KFiling

Source: U.S. House Clerk and Senate Office of Public Records (eFD). Amounts are the ranges filers report.