Form4insider filings, from the source

Company · CIK 0001057352 · SIC 7389 — Services-Business Services, NEC · Nasdaq

COSTAR GROUP, INC. · CSGP

Insider activity reported against this company. All insider holders · On EDGAR ↗

1M3M6M1Y2YAll datashares as filed — not split-adjusted
Open-market buys & salesbuys $2.5M · 1sales $144.9M · 39net −$142.4M
$10k$10k$1M$1M$100M$100MbuyssalesMar 2015Jan 2017Dec 2018Nov 2020Oct 2022Sep 2024Aug 2026

Reported at this company — common stock

TradeReported (ET)InsiderSharesAvg priceTotalOwned afterΔ stakeFlags
Aug 7, 2026 SForm 4 →Aug 10, 4:06 pm EDTCynthia Cammett CannChief Accounting Officer4,788$30.78$147,37518,822−20.3%
Aug 5, 2026 SForm 4 →Aug 10, 4:06 pm EDTJohn W HillDirector3,500$30.21$105,73522,993−13.2% late
Aug 4, 2026 PForm 4 →Aug 5, 9:27 am EDTAndrew C FloranceFounder and CEO, Director83,300$29.89$2,489,8371,806,165+4.83%
Aug 1, 2026 FForm 4 →Aug 4, 5:24 pm EDTCynthia Cammett CannChief Accounting Officer1,077$28.76$30,97523,610—
Aug 1, 2026 FForm 4 →Aug 4, 5:24 pm EDTFrederick G. SaintPresident, Marketplaces1,436$28.76$41,299278,415—
Jul 1, 2026 FForm 4 →Jul 6, 4:05 pm EDTChristian M. LownChief Financial Officer5,597$29.36$164,328129,653—
Jun 23, 2026 AForm 4 →Jun 24, 9:14 pm EDTRachel C GlaserDirector8,262——12,419—
Jun 23, 2026 AForm 4 →Jun 24, 9:13 pm EDTJohn L BerisfordDirector8,262——11,235—
Jun 23, 2026 AForm 4 →Jun 24, 9:13 pm EDTJohn W HillDirector8,262——26,493—
Jun 23, 2026 AForm 4 →Jun 24, 9:13 pm EDTAngelique G. BrunnerDirector8,262——18,428—
Jun 23, 2026 AForm 4 →Jun 24, 9:13 pm EDTRobert W MusslewhiteDirector8,262——26,539—
Jun 23, 2026 AForm 4 →Jun 24, 9:13 pm EDTLouise S SamsDirector8,262——28,671—
Jun 23, 2026 AForm 4 →Jun 24, 9:12 pm EDTChristine M McCarthyDirector8,262——11,585—
Jun 15, 2026 FForm 4 →Jun 16, 5:32 pm EDTCynthia Cammett CannChief Accounting Officer461$32.04$14,77024,687—
Mar 11, 2019 FForm 4 →Mar 12, 6:06 pm EDTMatthew LinningtonExecutive VP, Sales2,206$459.98$1,014,71624,471— plan?
Mar 11, 2019 FForm 4 →Mar 12, 6:05 pm EDTAndrew C FlorancePresident and CEO, Director8,245$459.98$3,792,535121,108— plan?
Mar 4, 2019 SForm 4 →Mar 4, 6:17 pm ESTAndrew C FlorancePresident and CEO, Director55,322$473.38$26,188,328129,353−30.0% plan?
Mar 1, 2019 SForm 4 →Mar 4, 6:22 pm ESTLisa RugglesSenior VP, Global Research1,538$466.62$717,66214,009−9.89% plan?
Mar 1, 2019 SForm 4 →Mar 4, 6:20 pm ESTMatthew LinningtonExecutive VP, Sales4,701$477.31$2,243,83426,677−15.0% plan?
Mar 1, 2019 SForm 4 →Mar 4, 6:19 pm ESTScott T WheelerChief Financial Officer5,396$476.11$2,569,09030,302−15.1% plan?
Feb 28, 2019 FForm 4 →Mar 4, 6:22 pm ESTLisa RugglesSenior VP, Global Research337$454.33$153,10915,547— plan?
Feb 28, 2019 FMForm 4 →Mar 4, 6:20 pm ESTMatthew LinningtonExecutive VP, Sales888$302.88$268,95531,378— plan?
Feb 28, 2019 FForm 4 →Mar 4, 6:19 pm ESTScott T WheelerChief Financial Officer885$454.33$402,08235,698— plan?
Feb 28, 2019 FMForm 4 →Mar 4, 6:17 pm ESTAndrew C FlorancePresident and CEO, Director57,520$115.62$6,650,313184,675— plan?
Feb 7, 2019 AForm 4 →Feb 11, 5:04 pm ESTLisa RugglesSenior VP, Global Research5,580——15,884— plan?
Feb 7, 2019 AForm 4 →Feb 11, 5:02 pm ESTMatthew LinningtonExecutive VP, Sales5,580——31,234— plan?
Feb 7, 2019 AForm 4 →Feb 11, 5:01 pm ESTScott T WheelerChief Financial Officer9,200——36,583— plan?
Feb 7, 2019 AForm 4 →Feb 11, 4:59 pm ESTAndrew C FlorancePresident and CEO, Director31,720——131,551— plan?
Jan 11, 2019 FForm 4 →Jan 14, 4:13 pm ESTScott T WheelerChief Financial Officer1,140$359.62$409,96727,383— plan?
Dec 31, 2018 FForm 4 →Jan 2, 2019, 4:14 pm ESTLisa RugglesSenior VP, Global Research167$337.19$56,31110,304— plan?
Dec 26, 2018 SForm 4 →Dec 28, 4:11 pm ESTJohn W HillDirector1,042$330.88$344,7773,907−21.1% plan?
Oct 29, 2018 SForm 4 →Oct 30, 5:51 pm EDTChristopher J NassettaDirector571$349.67$199,66226,456−2.11% plan?
Sep 28, 2018 DForm 4 →Oct 2, 4:17 pm EDTFrancis CarchediExecutive VP, Corp. Dev.15,347——6,540— plan?
Sep 20, 2018 AForm 4 →Sep 24, 4:35 pm EDTLaura Cox KaplanDirector431——1,944— plan?
Sep 20, 2018 AForm 4 →Sep 24, 4:33 pm EDTMichael J GlossermanDirector467——9,338— plan?
Sep 20, 2018 AForm 4 →Sep 24, 4:31 pm EDTMichael R KleinDirector467——265,196— plan?
Sep 20, 2018 AForm 4 →Sep 24, 4:29 pm EDTChristopher J NassettaDirector472——27,027— plan?
Sep 20, 2018 AForm 4 →Sep 24, 4:28 pm EDTWarren H HaberDirector453——121,049— plan?
Sep 20, 2018 AForm 4 →Sep 24, 4:26 pm EDTDavid Jay SteinbergDirector453——6,988— plan?
Sep 11, 2018 FForm 4 →Sep 12, 4:14 pm EDTMatthew LinningtonExecutive VP, Sales1,281$435.98$558,49025,654— plan?
Aug 6, 2018 SForm 4 →Aug 7, 4:29 pm EDTMichael R KleinDirector15,000$420.69$6,310,350264,729−5.36% plan?
Jul 31, 2018 GForm 4 →Sep 24, 4:23 pm EDTAndrew C FlorancePresident and CEO, Director20,000——99,831— plan? late
Jul 30, 2018 SForm 4 →Jul 31, 4:18 pm EDTMatthew LinningtonExecutive VP, Sales4,384$411.93$1,805,90126,935−14.0% plan?
Jul 30, 2018 MForm 4 →Jul 31, 4:18 pm EDTMatthew LinningtonExecutive VP, Sales4,384$187.45$821,78731,319— plan?
Jul 27, 2018 SForm 4 →Jul 31, 4:16 pm EDTScott T WheelerChief Financial Officer4,700$426.02$2,002,29428,523−14.1% plan?
Jul 27, 2018 MForm 4 →Jul 31, 4:16 pm EDTScott T WheelerChief Financial Officer4,700$204.91$963,07733,223— plan?
Jul 27, 2018 SForm 4 →Jul 31, 4:15 pm EDTFrancis CarchediExecutive VP, Corp. Dev.32,671$421.87$13,782,91521,329−60.5% plan?
Jul 27, 2018 FMForm 4 →Jul 31, 4:15 pm EDTFrancis CarchediExecutive VP, Corp. Dev.28,306$199.38$5,643,53521,887— plan?
May 31, 2018 AGForm 4 →Sep 24, 4:24 pm EDTJohn W HillDirector525——4,949— plan? late
May 31, 2018 FForm 4 →Jun 1, 4:17 pm EDTLisa RugglesSenior VP, Global Research71$380.86$27,04110,471— plan?
May 27, 2018 FForm 4 →May 30, 4:18 pm EDTLisa RugglesSenior VP, Global Research80$380.84$30,46710,542— plan?
May 9, 2018 GForm 4 →Aug 7, 4:29 pm EDTMichael R KleinDirector10,000——279,729— plan? late
Apr 26, 2018 SForm 4 →Apr 30, 4:17 pm EDTAndrew C FlorancePresident and CEO, Director24,821$371.03$9,209,313119,831−17.2% plan?
Mar 31, 2018 FForm 4 →Apr 3, 6:02 pm EDTLisa RugglesSenior VP, Global Research183$362.68$66,37010,622— plan?
Mar 31, 2018 FForm 4 →Apr 3, 6:01 pm EDTFrancis CarchediExecutive VP, Corp. Dev.724$362.68$262,58027,200— plan?
Mar 31, 2018 FForm 4 →Apr 3, 6:00 pm EDTMatthew LinningtonExecutive VP, Sales1,017$362.68$368,84626,935— plan?
Mar 31, 2018 FForm 4 →Apr 3, 5:58 pm EDTScott T WheelerChief Financial Officer1,239$362.68$449,36128,523— plan?
Mar 31, 2018 FForm 4 →Apr 3, 5:56 pm EDTAndrew C FlorancePresident and CEO, Director3,026$362.68$1,097,470144,652— plan?
Mar 29, 2018 SForm 4 →Mar 30, 4:06 pm EDTJohn W HillDirector1,150$361.28$415,4724,498−20.4% plan?
Mar 22, 2018 SForm 4 →Mar 23, 4:23 pm EDTMichael R KleinDirector3,000$361.61$1,084,830289,729−1.02% plan?
Mar 11, 2018 FForm 4 →Mar 13, 4:37 pm EDTMatthew LinningtonExecutive VP, Sales738$361.22$266,58027,952— plan?
Mar 11, 2018 FForm 4 →Mar 13, 4:36 pm EDTFrancis CarchediExecutive VP, Corp. Dev.660$361.22$238,40527,924— plan?
Mar 11, 2018 FForm 4 →Mar 13, 4:35 pm EDTAndrew C FlorancePresident and CEO, Director2,913$361.22$1,052,234147,678— plan?
Mar 7, 2018 SForm 4 →Mar 9, 4:24 pm ESTFrancis CarchediExecutive VP, Corp. Dev.12,100$356.09$4,308,68928,584−29.7% plan?
Mar 7, 2018 MForm 4 →Mar 9, 4:24 pm ESTFrancis CarchediExecutive VP, Corp. Dev.12,100$102.16$1,236,13640,684— plan?
Mar 5, 2018 SForm 4 →Mar 6, 5:05 pm ESTScott T WheelerChief Financial Officer1,250$353.69$442,11329,762−4.03% plan?
Mar 5, 2018 FForm 4 →Mar 6, 5:04 pm ESTFrancis CarchediExecutive VP, Corp. Dev.1,889$348.28$657,90128,584— plan?
Mar 5, 2018 FForm 4 →Mar 6, 5:01 pm ESTAndrew C FlorancePresident and CEO, Director8,605$348.28$2,996,949150,591— plan?
Mar 2, 2018 SForm 4 →Mar 6, 5:02 pm ESTMatthew LinningtonExecutive VP, Sales7,921$348.23$2,758,31330,271−20.7% plan?
Mar 2, 2018 FMForm 4 →Mar 6, 5:02 pm ESTMatthew LinningtonExecutive VP, Sales8,349$219.03$1,828,70528,690— plan?
Feb 28, 2018 AForm 4 →Mar 1, 4:39 pm ESTLisa RugglesSenior VP, Global Research5,460——10,805— plan?
Feb 28, 2018 AForm 4 →Mar 1, 4:35 pm ESTScott T WheelerChief Financial Officer8,860——31,012— plan?
Feb 28, 2018 AForm 4 →Mar 1, 4:33 pm ESTFrancis CarchediExecutive VP, Corp. Dev.5,460——30,473— plan?
Feb 28, 2018 AForm 4 →Mar 1, 4:32 pm ESTMatthew LinningtonExecutive VP, Sales5,020——31,424— plan?
Feb 27, 2018 SForm 4 →Mar 1, 4:26 pm ESTAndrew C FlorancePresident and CEO, Director80,055$347.10$27,787,091133,896−37.4% plan?
Feb 27, 2018 AMForm 4 →Mar 1, 4:26 pm ESTAndrew C FlorancePresident and CEO, Director105,355$58.05$4,647,551159,196— plan?
Feb 26, 2018 GForm 4 →Mar 1, 4:28 pm ESTMichael R KleinDirector18,453——292,729— plan? late
Jan 11, 2018 FForm 4 →Jan 12, 4:21 pm ESTScott T WheelerChief Financial Officer1,176$314.44$369,78122,152— plan?
Dec 31, 2017 FForm 4 →Jan 3, 2018, 4:25 pm ESTLisa RugglesSenior VP, Global Research185$296.95$54,9365,345— plan?
Sep 13, 2017 AForm 4 →Sep 14, 5:53 pm EDTChristopher J NassettaDirector720——26,555— plan?
Sep 13, 2017 AForm 4 →Sep 14, 5:52 pm EDTMichael J GlossermanDirector713——8,871— plan?
Sep 13, 2017 AForm 4 →Sep 14, 5:51 pm EDTWarren H HaberDirector691——120,596— plan?
Sep 13, 2017 AForm 4 →Sep 14, 5:50 pm EDTLaura Cox KaplanDirector658——1,513— plan?
Sep 13, 2017 AForm 4 →Sep 14, 5:49 pm EDTDavid Jay SteinbergDirector691——6,535— plan?
Sep 13, 2017 AForm 4 →Sep 14, 5:48 pm EDTMichael R KleinDirector713——311,182— plan?
Sep 11, 2017 FForm 4 →Sep 12, 4:40 pm EDTMatthew LinningtonExecutive VP, Sales1,197$280.40$335,63926,404— plan?
Jul 31, 2017 SForm 4 →Aug 1, 4:34 pm EDTMatthew LinningtonExecutive VP, Sales1,767$273.15$482,65627,601−6.02% plan?
Jul 31, 2017 MForm 4 →Aug 1, 4:34 pm EDTMatthew LinningtonExecutive VP, Sales1,032$193.69$199,88829,368— plan?
Jun 26, 2017 SForm 4 →Jun 27, 4:33 pm EDTMichael R KleinDirector20,000$265.01$5,300,200310,469−6.05% plan?
Jun 12, 2017 AGForm 4 →Sep 12, 4:39 pm EDTAndrew C FlorancePresident and CEO, Director15,011——133,896— plan? late
May 17, 2017 AGForm 4 →Sep 14, 5:47 pm EDTJohn W HillDirector795——5,648— plan? late
May 2, 2017 SForm 4 →May 3, 6:06 pm EDTJohn W HillDirector440$244.52$107,5894,953−8.16% plan?
May 2, 2017 SForm 4 →May 3, 6:03 pm EDTFrancis CarchediExecutive VP, Corp. Dev.5,500$245.04$1,347,72025,013−18.0% plan?
May 2, 2017 MForm 4 →May 3, 6:03 pm EDTFrancis CarchediExecutive VP, Corp. Dev.5,500$37.42$205,81030,513— plan?
May 2, 2017 SForm 4 →May 3, 6:02 pm EDTAndrew C FlorancePresident and CEO, Director43,536$244.46$10,642,811148,885−22.6% plan?
May 2, 2017 MForm 4 →May 3, 6:02 pm EDTAndrew C FlorancePresident and CEO, Director43,536$42.29$1,841,137170,653— plan?
May 1, 2017 SForm 4 →May 3, 6:05 pm EDTScott T WheelerChief Financial Officer757$240.00$181,68023,328−3.14% plan?
May 1, 2017 SForm 4 →May 3, 6:04 pm EDTMatthew LinningtonExecutive VP, Sales1,037$240.00$248,88028,336−3.53% plan?
Mar 11, 2017 FForm 4 →Mar 14, 5:26 pm EDTMatthew LinningtonExecutive VP, Sales557$205.18$114,28529,373— plan?
Mar 11, 2017 FForm 4 →Mar 14, 5:25 pm EDTAndrew C FlorancePresident and CEO, Director3,069$205.18$629,697148,885— plan?

Reported at this company — derivatives (options, RSUs, warrants)

TradeReported (ET)InsiderSharesAvg priceTotalOwned afterΔ stakeFlags
Jul 31, 2026 AForm 4 →Aug 4, 5:24 pm EDTRobin Jack RossmannChief Financial Officer34,771——34,771—
Jul 31, 2026 AForm 4 →Aug 4, 5:24 pm EDTCynthia Cammett CannChief Accounting Officer26,078——26,078—
Mar 4, 2019 MForm 4 →Mar 4, 6:17 pm ESTAndrew C FlorancePresident and CEO, Director55,322——0—
Mar 1, 2019 MForm 4 →Mar 4, 6:20 pm ESTMatthew LinningtonExecutive VP, Sales516——0—
Feb 7, 2019 AForm 4 →Feb 11, 5:04 pm ESTLisa RugglesSenior VP, Global Research3,800——3,800—
Feb 7, 2019 AForm 4 →Feb 11, 5:02 pm ESTMatthew LinningtonExecutive VP, Sales3,800——3,800—
Feb 7, 2019 AForm 4 →Feb 11, 5:01 pm ESTScott T WheelerChief Financial Officer6,400——6,400—
Feb 7, 2019 AForm 4 →Feb 11, 4:59 pm ESTAndrew C FlorancePresident and CEO, Director22,200——22,200—
Jul 30, 2018 MForm 4 →Jul 31, 4:18 pm EDTMatthew LinningtonExecutive VP, Sales4,384——3,500—
Jul 27, 2018 MForm 4 →Jul 31, 4:16 pm EDTScott T WheelerChief Financial Officer4,700——9,400—
Jul 27, 2018 MForm 4 →Jul 31, 4:15 pm EDTFrancis CarchediExecutive VP, Corp. Dev.27,832——0—
Mar 7, 2018 MForm 4 →Mar 9, 4:24 pm ESTFrancis CarchediExecutive VP, Corp. Dev.12,100——0—
Mar 2, 2018 MForm 4 →Mar 6, 5:02 pm ESTMatthew LinningtonExecutive VP, Sales6,768——6,000—
Feb 28, 2018 AForm 4 →Mar 1, 4:39 pm ESTLisa RugglesSenior VP, Global Research6,500——6,500—
Feb 28, 2018 AForm 4 →Mar 1, 4:35 pm ESTScott T WheelerChief Financial Officer10,800——10,800—
Feb 28, 2018 AForm 4 →Mar 1, 4:33 pm ESTFrancis CarchediExecutive VP, Corp. Dev.6,500——6,500—
Feb 28, 2018 AForm 4 →Mar 1, 4:32 pm ESTMatthew LinningtonExecutive VP, Sales6,000——6,000—
Feb 27, 2018 AMForm 4 →Mar 1, 4:26 pm ESTAndrew C FlorancePresident and CEO, Director111,055——31,000—
Jul 31, 2017 MForm 4 →Aug 1, 4:34 pm EDTMatthew LinningtonExecutive VP, Sales1,032——6,168—
May 2, 2017 MForm 4 →May 3, 6:03 pm EDTFrancis CarchediExecutive VP, Corp. Dev.5,500——0—
May 2, 2017 MForm 4 →May 3, 6:02 pm EDTAndrew C FlorancePresident and CEO, Director43,536——0—
Mar 2, 2017 AForm 4 →Mar 2, 6:17 pm ESTMatthew LinningtonExecutive VP, Sales11,300——11,300—
Mar 2, 2017 AForm 4 →Mar 2, 6:16 pm ESTScott T WheelerChief Financial Officer14,100——14,100—
Mar 2, 2017 AMForm 4 →Mar 2, 6:15 pm ESTFrancis CarchediExecutive VP, Corp. Dev.12,800——5,500—
Mar 2, 2017 AForm 4 →Mar 2, 6:14 pm ESTAndrew C FlorancePresident and CEO, Director34,600——34,600—
Dec 29, 2016 MForm 4 →Dec 29, 4:53 pm ESTAndrew C FlorancePresident and CEO, Director3,173——55,322—
Mar 11, 2016 AForm 4 →Mar 15, 5:58 pm EDTMatthew LinningtonExecutive VP, Sales9,000——9,000—
Mar 11, 2016 AForm 4 →Mar 15, 5:58 pm EDTAndrew C FlorancePresident and CEO, Director36,600——36,600— amended
Mar 11, 2016 AForm 4 →Mar 15, 5:57 pm EDTFrancis CarchediExecutive VP, Operations8,200——8,200— amended
Dec 9, 2015 MForm 4 →Dec 9, 5:05 pm ESTAndrew C FlorancePresident and CEO, Director10,086——40,550—
Mar 13, 2015 MForm 4 →Mar 13, 5:07 pm EDTBrian J RadeckiChief Financial Officer4,500——4,500—
Mar 5, 2015 AForm 4 →Mar 9, 5:18 pm EDTAndrew C FlorancePresident and CEO, Director32,200——32,200—
Mar 5, 2015 AForm 4 →Mar 9, 5:18 pm EDTFrancis CarchediExecutive VP, Operations8,500——8,500—
Mar 5, 2015 AForm 4 →Mar 9, 5:18 pm EDTMatthew LinningtonExecutive Vice President Sales7,200————
Mar 5, 2015 AForm 4 →Mar 9, 5:17 pm EDTBrian J RadeckiChief Financial Officer14,000——14,000—
Mar 2, 2015 MForm 4 →Mar 3, 4:56 pm ESTBrian J RadeckiChief Financial Officer9,134——9,000—