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CSGP Insider Trading

Insider Ownership Percentage: 1.18%
Insider Buying (Last 12 Months): $5,052,533.00
Insider Selling (Last 12 Months): $147,374.64

CoStar Group Insider Trading History Chart

This chart shows the insider buying and selling history at CoStar Group by year and by quarter.

Skip ChartChart Data in Insider Trading History Table

CoStar Group Share Price & Price History

Current Price: $27.06
Price Change: ▼ Price Decrease of -1.035 (-3.68%)
As of 09/28/2026 02:57 PM ET

This chart shows the closing price history over time for CSGP up to the past year.

Skip Chart and Table DataPrice Data in Insider Trading History Table
Days: 30 | 90 | 365

CoStar Group Insider Trading History

Transaction DateInsider NameTitleBuy/SellNumber of SharesAverage Share PriceTotal TransactionShares Held After TransactionDetails
8/7/2026Cynthia Cammett CannCAOSell4,788$30.78$147,374.6418,822View SEC Filing Icon  
8/4/2026Andrew C. FloranceCEOBuy83,300$29.89$2,489,837.001,806,165View SEC Filing Icon  
5/1/2026Andrew C. FloranceCEOBuy71,430$35.20$2,514,336.001,722,865View SEC Filing Icon  
3/6/2026Louise S SamsDirectorBuy1,000$48.36$48,360.0020,409View SEC Filing Icon  
8/28/2025Frederick G SaintInsiderSell25,000$90.33$2,258,250.00293,103View SEC Filing Icon  
7/28/2025Cynthia Cammett CannCAOSell2,033$92.85$188,764.0525,771View SEC Filing Icon  
7/28/2025Frederick G SaintInsiderSell25,000$93.23$2,330,750.00319,539View SEC Filing Icon  
3/10/2025Cynthia Cammett CannCAOSell1,749$79.90$139,745.1029,456View SEC Filing Icon  
11/26/2024Michael J. DesmaraisInsiderSell5,500$79.88$439,340.0058,798View SEC Filing Icon  
11/11/2024Cynthia Cammett CannCAOSell1,310$76.85$100,673.5026,485View SEC Filing Icon  
10/25/2024Andrew C. FloranceCEOBuy14,731$74.67$1,099,963.771,263,098View SEC Filing Icon  
10/25/2024Michael R. KleinDirectorSell71,633$74.69$5,350,268.771,913,501View SEC Filing Icon  
7/31/2024Cynthia Cammett CannCAOSell1,200$78.20$93,840.0027,795View SEC Filing Icon  
4/26/2024Michael J. DesmaraisInsiderSell3,800$92.67$352,146.0064,087View SEC Filing Icon  
4/26/2024Scott T WheelerCFOSell122,736$92.61$11,366,580.96303,417View SEC Filing Icon  
11/28/2023John W. HillDirectorSell3,020$84.07$253,891.4017,870View SEC Filing Icon  
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SEC Filings (Institutional Ownership Changes) for CoStar Group (NASDAQ:CSGP)

96.60% of CoStar Group stock is owned by institutions. Institutional ownership can be a sign of analyst confidence in the fundamentals of the stock.

Institutional Buying and Selling by Quarter

This chart shows the instiutional buying and selling at CSGP by year and by quarter.

Skip Institutional Buying and Selling Chart and Table DataRead Chart Data in Institutional Trading History Table

CoStar Group Institutional Trading History

Reporting DateHedge FundShares HeldMarket Value% of PortfolioQuarterly Change in SharesOwnership in CompanyDetails
9/23/2026QRG Capital Management Inc.57,474$1.63M0.0%+85.8%0.014%Search for SEC Filing on Google Icon
9/23/2026Envestnet Portfolio Solutions Inc.341,444$9.67M0.0%+5.3%0.084%Search for SEC Filing on Google Icon
9/9/2026Sequoia Financial Advisors LLC54,883$1.55M0.0%+6.2%0.014%Search for SEC Filing on Google Icon
9/9/2026Tidal Investments LLC68,552$1.94M0.0%+176.9%0.017%Search for SEC Filing on Google Icon
9/9/2026National Pension Service42,241$1.20M0.0%-94.0%0.010%Search for SEC Filing on Google Icon
9/9/2026Engineers Gate Manager LP97,924$2.77M0.0%N/A0.024%Search for SEC Filing on Google Icon
9/9/2026SVB Wealth LLC90,226$2.56M0.1%-6.1%0.022%Search for SEC Filing on Google Icon
9/9/2026Integrated Wealth Concepts LLC17,173$0.49M0.0%+107.3%0.004%Search for SEC Filing on Google Icon
9/9/2026NewEdge Advisors LLC11,879$0.34M0.0%+2,266.3%0.003%Search for SEC Filing on Google Icon
9/9/2026IFP Advisors Inc3,968$0.11M0.0%+146.9%0.001%Search for SEC Filing on Google Icon
9/9/2026Baird Financial Group Inc.11,769$0.33M0.0%+9.6%0.003%Search for SEC Filing on Google Icon
9/8/2026Allworth Financial LP13,582$0.39M0.0%+281.9%0.003%Search for SEC Filing on Google Icon
9/8/2026Arizona State Retirement System120,360$3.41M0.0%+4.5%0.030%Search for SEC Filing on Google Icon
9/8/2026Waverly Advisors LLC11,445$0.32M0.0%N/A0.003%Search for SEC Filing on Google Icon
9/8/2026Empirical Finance LLC8,770$0.25M0.0%+6.6%0.002%Search for SEC Filing on Google Icon
9/8/2026Nykredit A S401,475$11.37M0.0%N/A0.099%Search for SEC Filing on Google Icon
9/4/2026Parkside Financial Bank & Trust5,365$0.15M0.0%+26.1%0.001%Search for SEC Filing on Google Icon
8/27/2026Corient Private Wealth LP81,676$2.31M0.0%+2.9%0.020%Search for SEC Filing on Google Icon
8/26/2026Amundi3,135,933$88.81M0.0%-4.4%0.774%Search for SEC Filing on Google Icon
8/26/2026HighTower Advisors LLC115,385$3.27M0.0%-7.1%0.028%Search for SEC Filing on Google Icon
8/24/2026CYBER HORNET ETFs LLC1,757$50K0.0%+50.8%0.000%Search for SEC Filing on Google Icon
8/23/2026Wedmont Private Capital17,302$0.49M0.0%N/A0.004%Search for SEC Filing on Google Icon
8/23/2026HB Wealth Management LLC71,357$2.02M0.0%+7.4%0.018%Search for SEC Filing on Google Icon
8/23/2026Saudi Central Bank29,386$0.83M0.0%+87.8%0.007%Search for SEC Filing on Google Icon
8/22/2026AlphaGrep UK Ltd14,994$0.43M0.1%N/A0.004%Search for SEC Filing on Google Icon
8/22/2026Three Seasons Wealth LLC20,828$0.59M0.1%-21.8%0.005%Search for SEC Filing on Google Icon
8/22/2026Knollwood Investment Advisory LLC32,150$0.91M0.1%-23.2%0.008%Search for SEC Filing on Google Icon
8/22/2026Syon Capital LLC7,326$0.21M0.0%+26.3%0.002%Search for SEC Filing on Google Icon
8/22/2026Premier Path Wealth Partners LLC11,265$0.32M0.0%-17.3%0.003%Search for SEC Filing on Google Icon
8/22/2026NEOS Investment Management LLC165,566$4.69M0.0%-54.6%0.041%Search for SEC Filing on Google Icon
8/21/2026AXQ Capital LP49,543$1.40M0.2%+62.6%0.012%Search for SEC Filing on Google Icon
8/21/2026Nykredit A S153,356$4.34M0.0%N/A0.038%Search for SEC Filing on Google Icon
8/21/2026B. Metzler seel. Sohn & Co. AG28,620$0.81M0.0%-6.6%0.007%Search for SEC Filing on Google Icon
8/21/2026Ironvine Capital Partners LLC294,475$8.34M0.7%-21.5%0.073%Search for SEC Filing on Google Icon
8/20/2026Spyglass Capital Management LLC2,694,697$76.31M4.1%+142.5%0.665%Search for SEC Filing on Google Icon
8/20/2026Headlands Technologies LLC104,978$2.97M0.3%+196.3%0.026%Search for SEC Filing on Google Icon
8/20/2026Quantitative Investment Management LLC69,418$1.97M0.2%-3.2%0.017%Search for SEC Filing on Google Icon
8/20/2026Two Sigma Securities LLC16,096$0.46M0.0%+67.2%0.004%Search for SEC Filing on Google Icon
8/20/2026Benjamin Edwards Inc.13,064$0.37M0.0%-17.8%0.003%Search for SEC Filing on Google Icon
8/20/2026GTS Securities LLC7,889$0.22M0.0%+31.8%0.002%Search for SEC Filing on Google Icon
8/20/2026Northwestern Mutual Wealth Management Co.12,753$0.36M0.0%-21.4%0.003%Search for SEC Filing on Google Icon
8/19/2026UBS AM a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC2,521,571$71.41M0.0%+4.0%0.622%Search for SEC Filing on Google Icon
8/19/2026New Mexico Educational Retirement Board21,100$0.60M0.0%+7.7%0.005%Search for SEC Filing on Google Icon
8/19/2026Royal London Asset Management Ltd.187,394$5.31M0.0%-56.6%0.046%Search for SEC Filing on Google Icon
8/19/2026Mufg Securities Americas Inc.12,300$0.35M0.0%+4.9%0.003%Search for SEC Filing on Google Icon
8/19/2026Van ECK Associates Corp3,078,903$87.20M0.1%-11.5%0.760%Search for SEC Filing on Google Icon
8/19/2026Nissay Asset Management Corp Japan56,761$1.61M0.0%-51.9%0.014%Search for SEC Filing on Google Icon
8/19/2026Wellington Management Group LLP50,070$1.42M0.0%+2.4%0.012%Search for SEC Filing on Google Icon
8/18/2026Pin Oak Investment Advisors Inc.1,672$47K0.0%N/A0.000%Search for SEC Filing on Google Icon
8/18/2026Livforsakringsbolaget Skandia Omsesidigt2,100$59K0.0%N/A0.001%Search for SEC Filing on Google Icon
8/18/2026Rakuten Investment Management Inc.68,040$2M0.0%N/A0.017%Search for SEC Filing on Google Icon
8/18/2026North Star Asset Management Inc.112,073$3.17M0.1%N/A0.028%Search for SEC Filing on Google Icon
8/18/2026Empowered Funds LLC17,174$0.49M0.0%N/A0.004%Search for SEC Filing on Google Icon
8/18/2026United Capital Financial Advisors LLC24,222$0.69M0.0%N/A0.006%Search for SEC Filing on Google Icon
8/18/2026Centaurus Financial Inc.13,390$0.38M0.0%N/A0.003%Search for SEC Filing on Google Icon
8/18/2026Formula Growth Ltd.34,000$0.96M0.3%N/A0.008%Search for SEC Filing on Google Icon
8/18/2026Jefferies Financial Group Inc.148,731$4.21M0.0%N/A0.037%Search for SEC Filing on Google Icon
8/18/2026Public Employees Retirement System of Ohio117,069$3.32M0.0%N/A0.029%Search for SEC Filing on Google Icon
8/17/2026Transamerica Financial Advisors LLC1,156$33K0.0%N/A0.000%Search for SEC Filing on Google Icon
8/17/2026Corient Private Wealth LP82,804$2.35M0.0%N/A0.020%Search for SEC Filing on Google Icon
8/17/2026Perennial Investment Advisors LLC10,632$0.30M0.0%N/A0.003%Search for SEC Filing on Google Icon
8/17/2026Petrus Trust Company LTA756,200$21.42M2.0%N/A0.187%Search for SEC Filing on Google Icon
8/17/2026Bamco Inc. NY21,626,763$612.47M0.9%N/A5.337%Search for SEC Filing on Google Icon
8/17/2026Bank of America Corp DE2,735,102$77.46M0.0%N/A0.675%Search for SEC Filing on Google Icon
8/15/2026American Capital Management Inc.725,143$20.54M0.9%N/A0.179%Search for SEC Filing on Google Icon
8/15/2026Odyssean LLC90,524$2.56M0.4%N/A0.022%Search for SEC Filing on Google Icon
8/15/2026Man Group plc921,094$26.09M0.0%N/A0.227%Search for SEC Filing on Google Icon
8/15/2026Jupiter Topco LLC7,832,860$221.83M0.1%N/A1.933%Search for SEC Filing on Google Icon
8/14/2026Primecap Management Co. CA821,600$23.27M0.0%N/A0.203%Search for SEC Filing on Google Icon
8/14/2026Canada Pension Plan Investment Board2,481,641$70.28M0.0%N/A0.612%Search for SEC Filing on Google Icon
8/14/2026Legal & General Group Plc1,682,774$47.66M0.0%N/A0.415%Search for SEC Filing on Google Icon
8/14/2026The Manufacturers Life Insurance Company226,560$6.42M0.0%N/A0.056%Search for SEC Filing on Google Icon
8/14/2026Sone Capital Management LLC254,096$7.20M0.5%N/A0.063%Search for SEC Filing on Google Icon
8/14/2026Wolf Hill Capital Management LP29,100$0.82M0.0%N/A0.007%Search for SEC Filing on Google Icon
8/13/2026Meritage Group LP5,394,164$152.76M5.9%N/A1.331%Search for SEC Filing on Google Icon
8/13/2026OMERS ADMINISTRATION Corp207,870$5.89M0.0%N/A0.051%Search for SEC Filing on Google Icon
8/13/2026Sanctuary Advisors LLC36,059$1.02M0.0%N/A0.009%Search for SEC Filing on Google Icon
8/13/2026Barbara Oil Co.32,000$0.95M0.3%N/A0.008%Search for SEC Filing on Google Icon
8/13/2026Connor Clark & Lunn Investment Management Ltd.1,169,688$33.13M0.1%N/A0.289%Search for SEC Filing on Google Icon
8/13/2026Bank of Nova Scotia93,291$2.65M0.0%N/A0.023%Search for SEC Filing on Google Icon
8/12/2026Elevation Point Wealth Partners LLC7,721$0.22M0.0%N/A0.002%Search for SEC Filing on Google Icon
8/12/2026Northwestern Mutual Wealth Management Co.12,753$0.36M0.0%N/A0.003%Search for SEC Filing on Google Icon
8/12/2026Quantbot Technologies LP62,491$1.77M0.1%N/A0.015%Search for SEC Filing on Google Icon
8/12/2026Evolve Private Wealth LLC16,163$0.46M0.0%N/A0.004%Search for SEC Filing on Google Icon
8/12/2026Korea Investment CORP698,417$19.78M0.0%N/A0.172%Search for SEC Filing on Google Icon
8/12/2026Ieq Capital LLC351,667$9.96M0.0%N/A0.087%Search for SEC Filing on Google Icon
8/12/2026Callan Family Office LLC11,764$0.33M0.0%N/A0.003%Search for SEC Filing on Google Icon
8/11/2026Allworth Financial LP13,582$0.39M0.0%N/A0.003%Search for SEC Filing on Google Icon
8/11/2026B. Metzler seel. Sohn & Co. AG28,620$0.81M0.0%N/A0.007%Search for SEC Filing on Google Icon
8/10/2026NewEdge Wealth LLC18,538$0.53M0.0%N/A0.005%Search for SEC Filing on Google Icon
8/10/2026Danske Bank A S174,139$4.93M0.0%N/A0.043%Search for SEC Filing on Google Icon
8/10/2026Diversify Advisory Services LLC25,570$0.75M0.0%N/A0.006%Search for SEC Filing on Google Icon
8/8/2026Wealthfront Advisers LLC24,534$0.70M0.0%N/A0.006%Search for SEC Filing on Google Icon
8/8/2026Meeder Advisory Services Inc.10,849$0.31M0.0%N/A0.003%Search for SEC Filing on Google Icon
8/8/2026Meeder Asset Management Inc.12,720$0.36M0.0%N/A0.003%Search for SEC Filing on Google Icon
8/7/2026Citizens Financial Group Inc. RI12,982$0.37M0.0%N/A0.003%Search for SEC Filing on Google Icon
8/7/2026BlackRock Inc.33,813,969$957.61M0.0%N/A8.345%Search for SEC Filing on Google Icon
8/7/2026Pallas Capital Advisors LLC26,889$0.76M0.0%N/A0.007%Search for SEC Filing on Google Icon
8/7/2026Deutsche Bank AG2,264,379$64.13M0.0%N/A0.559%Search for SEC Filing on Google Icon
8/7/2026Perigon Wealth Management LLC8,716$0.25M0.0%N/A0.002%Search for SEC Filing on Google Icon
Data available starting January 2016

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CoStar Group logo
CoStar Group, Inc. provides information, analytics, and online marketplace services to the commercial real estate, hospitality, residential, and related professionals industries in the United States, Canada, Europe, the Asia Pacific, and Latin America. The company offers CoStar Property that provides inventory of office, industrial, retail, multifamily, hospitality, and student housing properties and land; CoStar Sales, a robust database of comparable commercial real estate sales transactions; CoStar Market Analytics to view and report on aggregated market and submarket trends; and CoStar Tenant, an online business-to-business prospecting and analytical tool that provides tenant information. It also provides Leasing, a tool to capture, manage, and maintain lease data; CoStar Lease Analysis; Public Record, a searchable database of commercially zoned parcels; CoStar Real Estate Manager, a real estate lease administration, portfolio management, and lease accounting compliance software solution; and CoStar Risk Analytics and CoStar Investment. In addition, it offers apartment marketing sites, such as ApartmentFinder.com, ForRent.com, ApartmentHomeLiving.com, WestsideRentals.com, AFTER55.com, CorporateHousing.com, ForRentUniversity.com, Apartamentos.com, and Off Campus Partners; LoopNet Premium Lister; LoopNet Diamond, Platinum, and Gold Ads; LandsofAmerica.com, LandAndFarm.com, and LandWatch.com for rural land for-sale; BizBuySell.com, BizQuest.com, and FindaFranchise.com for operating businesses and franchises for-sale; Ten-X, an online auction platform for commercial real estate; and HomeSnap, an online and mobile software platform, as well as Homes.com, a homes for sale listings site. The company was founded in 1987 and is headquartered in Washington, the District of Columbia.
Read More on CoStar Group

Today's Range

Now: $27.06
Low: $26.85
High: $27.75

50 Day Range

MA: $30.43
Low: $27.14
High: $33.73

52 Week Range

Now: $27.06
Low: $25.89
High: $85.24

Volume

2,834,629 shs

Average Volume

7,162,565 shs

Market Capitalization

$10.96 billion

P/E Ratio

142.40

Dividend Yield

N/A

Beta

0.75

Who are the company insiders with the largest holdings of CoStar Group?

CoStar Group's top insider investors include:
  1. Michael R Klein (Director)
  2. Andrew C Florance (CEO)
  3. Scott T Wheeler (CFO)
  4. Frederick G Saint (Insider)
  5. Frank Simuro (CTO)
  6. Lisa Ruggles (VP)
  7. Andrew C Florance (CEO)
  8. Warren Haber (Director)
  9. Michael J Desmarais (Insider)
  10. Brian Radecki (CFO)
Learn More about top insider investors at CoStar Group.

Who are the major institutional investors of CoStar Group?

CoStar Group's top institutional investors include:
  1. BlackRock Inc. — 8.35%
  2. Bamco Inc. NY — 5.34%
  3. Jupiter Topco LLC — 1.93%
  4. Meritage Group LP — 1.33%
  5. Amundi — 0.77%
  6. Van ECK Associates Corp — 0.76%
Learn More about top institutional investors of CoStar Group stock.

Which institutional investors are selling CoStar Group stock?

Within the last quarter, CSGP stock was sold by these institutional investors:
  1. National Pension Service
  2. Van ECK Associates Corp
  3. Royal London Asset Management Ltd.
  4. NEOS Investment Management LLC
  5. Amundi
  6. PensionDanmark Pensionsforsikringsaktieselskab
  7. Ironvine Capital Partners LLC
  8. Nissay Asset Management Corp Japan

Which institutional investors are buying CoStar Group stock?

During the last quarter, CSGP stock was purchased by institutional investors including:
  1. BlackRock Inc.
  2. Bamco Inc. NY
  3. Jupiter Topco LLC
  4. Meritage Group LP
  5. Bank of America Corp DE
  6. Canada Pension Plan Investment Board
  7. Deutsche Bank AG
  8. Bank of New York Mellon Corp
During the last year, these company insiders have bought CoStar Group stock:
  1. Andrew C Florance (CEO)
  2. Louise S Sams (Director)
Learn More investors buying CoStar Group stock.

CoStar Group Active Insiders

Andrew C Florance
Andrew C Florance (Age 62)
CEO
2 recent trades
Scott T. Wheeler
Scott T. Wheeler (Age 62)
CFO
Laura Cox Kaplan
Laura Cox Kaplan (Age 55)
Director
John W Hill
John W Hill
Director
Frank Simuro
Frank Simuro (Age 59)
CTO
Michael R Klein
Michael R Klein
Director
Louise S Sams
Louise S Sams
Director
Lisa Ruggles
Lisa Ruggles (Age 58)
VP
Frederick G. Saint
Frederick G. Saint (Age 60)
Insider
Michael J Desmarais
Michael J Desmarais
Insider