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CoStar Group Inc (CSGP) Insider Trading

Total insider buys:
  • $1,202,969.27
Total insider sells:
  • $324,518,845.31
Most recent insider trade:
  • July 28, 2025
Most active insider trader:
  • Andrew C. Florance
Trader NameDateTitleAmountPriceTypeTotal Value
April 30, 2018CEO5,839$369.05Sell$2,154,882.95
April 30, 2018Insider24,821$371.03Sell$9,209,335.63
April 26, 2018CEO7,782$372.34Sell$2,897,549.88
March 29, 2018Director1,150$361.28Sell$415,472.00
March 22, 2018Director3,000$361.61Sell$1,084,830.00
March 7, 2018VP12,100$356.09Sell$4,308,689.00
March 5, 2018CFO1,250$353.69Sell$442,112.50
March 2, 2018VP7,921$348.23Sell$2,758,329.83
July 31, 2017VP1,767$273.15Sell$482,656.05
June 26, 2017Director20,000$265.01Sell$5,300,200.00
May 3, 2017CEO21,768$244.19Sell$5,315,527.92
May 3, 2017insider43,536$244.46Sell$10,642,810.56
May 2, 2017CEO21,768$244.73Sell$5,327,282.64
May 2, 2017VP5,500$245.04Sell$1,347,720.00
May 2, 2017Director440$244.52Sell$107,588.80
May 1, 2017VP1,037$240.00Sell$248,880.00
May 1, 2017CFO757$240.00Sell$181,680.00
March 6, 2017VP2,448$205.30Sell$502,574.40
March 2, 2017Insider26,271$205.31Sell$5,393,699.01
March 2, 2017VP4,500$204.98Sell$922,410.00
Nov. 1, 2016Director575$187.67Sell$107,910.25
Oct. 31, 2016VP1,060$188.31Sell$199,608.60
Aug. 1, 2016Director5,000$206.33Sell$1,031,650.00
Nov. 13, 2015VP3,414$201.65Sell$688,433.10
Nov. 11, 2015CEO17,612$205.10Sell$3,612,221.20
June 15, 2015Director1,225$204.82Sell$250,904.50
March 13, 2015CFO4,500$192.53Sell$866,385.00
March 9, 2015VP5,910$191.05Sell$1,129,105.50
March 2, 2015CFO14,634$197.14Sell$2,884,946.76
March 2, 2015CEO33,187$197.90Sell$6,567,707.30
Aug. 26, 2014Director3,242$148.11Sell$480,172.62
March 11, 2014VP25,915$208.55Sell$5,404,573.25
Nov. 22, 2013CFO8,500$180.10Sell$1,530,850.00
Nov. 22, 2013VP10,000$180.00Sell$1,800,000.00
Oct. 28, 2013CEO54,400$179.08Sell$9,741,952.00
Sept. 9, 2013VP2,750$160.85Sell$442,337.50
Aug. 27, 2013Director1,015$147.89Sell$150,108.35
Aug. 20, 2013Director1,396$153.53Sell$214,327.88
Aug. 2, 2013Director1,800$158.71Sell$285,678.00
July 30, 2013VP10,325$157.00Sell$1,621,025.00
July 30, 2013CFO10,267$157.00Sell$1,611,919.00
July 30, 2013CEO72,128$156.42Sell$11,282,261.76
March 13, 2013VP16,066$100.01Sell$1,606,760.66
March 12, 2013VP14,599$101.10Sell$1,475,958.90
March 5, 2013VP9,675$102.74Sell$994,009.50
March 5, 2013CFO20,599$103.45Sell$2,130,966.55
March 4, 2013CEO32,330$102.85Sell$3,325,140.50
Sept. 6, 2012VP34,530$81.84Sell$2,825,935.20
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  • Insiders are both buying and selling CoStar Group Inc stock.

  • The insider traders at CoStar Group Inc are: Andrew C. Florance, Francis Carchedi, Matthew Linnington, John W Hill, Scott T. Wheeler, Michael J Desmarais, Andrew C Florance, Brian J Radecki, Scott T Wheeler, John W. Hill, Laura Cox Kaplan, Michael R. Klein, Christopher J. Nassetta, John L Stanfill, Christopher Nassetta, Cynthia Cammett Cann, Jennifer Kitchen, Lisa Ruggles, Frederick G. Saint, Warren Haber, Frederick G Saint, Frank Simuro, Michael J. Glosserman, Michael R Klein, David Jay Steinberg, Christopher J Nassetta, Brian Radecki, and John Stanfill

  • The most active insider trader at CoStar Group Inc is Andrew C. Florance with 12 trades.

  • Andrew C. Florance has sold the most CoStar Group Inc stock with a total value of $134,703,503.43.

  • Andrew C Florance has bought the most CoStar Group Inc stock with a total value of $2,199,927.54.

  • The most recent insider trade for CoStar Group Inc was on July 28, 2025.

  • The single biggest insider buy for CoStar Group Inc was from Andrew C Florance with a total value of $1,099,963.77 on Oct. 25, 2024.

  • The single biggest insider sell for CoStar Group Inc was from Andrew C. Florance with a total value of $26,188,328.36 on March 4, 2019.