Insider Trading › CSGP › Insiders
COSTAR GROUP, INC.
CSGP·Nasdaq·
United States·Insider activity
United States·Insider activity$27.63
-0.03 (-0.11%)
Close · Oct 6, 2026 · Close Prices from Tiingo.com
CSGP
Insider purchases and sales on the price
Nasdaq 100S&P 500
Filings
Default90D1Y5YALL
CSGPS&P 500 (rebased)
Insider BuyInsider SellForm 144 · planned sale
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Daily closes, adjusted for splits and dividends · Close Prices from Tiingo.comHover a marker, every one is a filing · move across the line for the crosshair
In the last 180 days, CSGP insiders filed 3 purchases ($5.0M) and 2 sales ($253K) on the open market, by 3 insiders. Newest filing Aug 10, 2026 (1 month ago).
Net Insider Buying by Quarter
Shares bought (+) or sold (−) on the open market by CSGP insiders · Form 4 · last two years
On Record
$5.0MPurchases · 180 days
$253KSales · 180 days
212Open-market transactions on record
3Insiders filing · 180 days
Purchases (code P) and sales (code S) of CSGP common stock reported on Form 4, with Form 5 annual catch-ups. Grants, option exercises, gifts and tax withholding are not shown. Dollars are shares × the stated price; a price outside anything the stock traded at that day is withheld (n/c).
Insider Transactions
212 on record · newest trade first
AllPurchasesSalesOfficers & directors
| Insider | Type | Shares | Price | Value | Held after | Traded | Filed | |
|---|---|---|---|---|---|---|---|---|
| Cann Cynthia CammettChief Accounting Officer | Sale | −4,788 | $30.78 | $147K | 18.8Kdirect | Aug 7, 2026 | Aug 10, 2026 | Form 4 ↗ |
| Hill John WDirector · Director | Sale | −3,500 | $30.21 | $106K | 23.0Kdirect | Aug 5, 2026 | Aug 10, 2026 | Form 4 ↗ |
| FLORANCE ANDREW CFounder and CEO · Director | Purchase | +83.3K | $29.89 | $2.5M | 1.8Mdirect | Aug 4, 2026 | Aug 5, 2026 | Form 4 ↗ |
| FLORANCE ANDREW CPresident and CEO · Director | Purchase | +3,100 | $35.82 | $111K | 1.7Mdirect | May 1, 2026 | May 4, 2026 | Form 4 ↗ |
| FLORANCE ANDREW CPresident and CEO · Director | Purchase | +68.3K | $35.17 | $2.4M | 1.7Mdirect | May 1, 2026 | May 4, 2026 | Form 4 ↗ |
| Sams Louise SDirector | Purchase | +1,000 | $48.36 | $48K | 20.4Kdirect | Mar 6, 2026 | Mar 9, 2026 | Form 4 ↗ |
| SAINT FREDERICK G.President, Marketplaces | Purchase | +20.0K | $45.33 | $907K | 279.9Kdirect | Mar 2, 2026 | Mar 3, 2026 | Form 4 ↗ |
| Glaser Rachel CDirector | Purchase | +1,000 | $44.94 | $45K | 4,157direct | Mar 2, 2026 | Mar 3, 2026 | Form 4 ↗ |
| FLORANCE ANDREW CPresident and CEO · Director | Purchase | +55.7K | $44.52 | $2.5M | 1.6Mdirect | Feb 27, 2026 | Mar 2, 2026 | Form 4 ↗ |
| Hill John WDirector | Sale | −2,250 | $68.68 | $155K | 18.2Kdirect | Nov 13, 2025 | Nov 17, 2025 | Form 4 ↗ |
| Cann Cynthia CammettChief Accounting Officer | Sale | −1,841 | $68.79 | $127K | 23.2Kdirect | Nov 13, 2025 | Nov 17, 2025 | Form 4 ↗ |
| SAINT FREDERICK G.President, Marketplaces | Sale | −25.0K | $90.33 | $2.3M | 293.1Kdirect | Aug 28, 2025 | Sep 2, 2025 | Form 4 ↗ |
| SAINT FREDERICK G.President, Marketplaces | Sale | −25.0K | $93.23 | $2.3M | 319.5Kdirect | Jul 28, 2025 | Jul 29, 2025 | Form 4 ↗ |
| Cann Cynthia CammettChief Accounting Officer | Sale | −2,033 | $92.85 | $189K | 25.8Kdirect | Jul 28, 2025 | Jul 29, 2025 | Form 4 ↗ |
| SAINT FREDERICK G.President, Marketplaces | Sale | −25.0K | $81.10 | $2.0M | 344.5Kdirect | Jun 11, 2025 | Jun 12, 2025 | Form 4 ↗ |
| Cann Cynthia CammettChief Accounting Officer | Sale | −1,749 | $79.90 | $140K | 29.5Kdirect | Mar 10, 2025 | Mar 14, 2025 | Form 4 ↗ |
| Hill John WDirector | Sale | −2,735 | $76.76 | $210K | 17.5Kdirect | Dec 10, 2024 | Dec 12, 2024 | Form 4 ↗ |
| NASSETTA CHRISTOPHER JDirector | Sale | −1,681 | $80.39 | $135K | 229.7Kdirect | Nov 27, 2024 | Dec 2, 2024 | Form 4 ↗ |
| DESMARAIS MICHAEL JChief Human Resources Officer | Sale | −5,500 | $79.88 | $439K | 58.8Kdirect | Nov 26, 2024 | Nov 27, 2024 | Form 4 ↗ |
| Cann Cynthia CammettChief Accounting Officer | Sale | −1,310 | $76.85 | $101K | 26.5Kdirect | Nov 11, 2024 | Mar 14, 2025 | Form 4 ↗ |
| KLEIN MICHAEL RDirector | Sale | −71.6K | $74.69 | $5.4M | 1.9Mdirect | Oct 25, 2024 | Oct 28, 2024 | Form 4 ↗ |
| FLORANCE ANDREW CPresident and CEO · Director | Purchase | +14.7K | $74.67 | $1.1M | 1.3Mdirect | Oct 25, 2024 | Oct 28, 2024 | Form 4 ↗ |
| Cann Cynthia CammettChief Accounting Officer | Sale | −1,200 | $78.20 | $94K | 27.8Kdirect | Jul 31, 2024 | Mar 14, 2025 | Form 4 ↗ |
| Hill John WDirector | Sale | −1,325 | $78.16 | $104K | 16.5Kdirect | Jul 30, 2024 | Aug 1, 2024 | Form 4 ↗ |
| SAINT FREDERICK G.President, Marketplaces | Sale | −2,500 | $88.43 | $221K | 282.9Kdirect | May 16, 2024 | May 17, 2024 | Form 4 ↗ |
| Ruggles LisaSenior VP, Global Operations | Sale | −20.0K | $91.15 | $1.8M | 172.6Kdirect | May 9, 2024 | May 10, 2024 | Form 4 ↗ |
| DESMARAIS MICHAEL JChief Human Resources Officer | Sale | −3,800 | $92.67 | $352K | 64.1Kdirect | Apr 26, 2024 | Apr 30, 2024 | Form 4 ↗ |
| Wheeler Scott TChief Financial Officer | Sale | −122.7K | $92.61 | $11.4M | 303.4Kdirect | Apr 26, 2024 | Apr 30, 2024 | Form 4 ↗ |
| Hill John WDirector | Sale | −3,020 | $84.07 | $254K | 17.9Kdirect | Nov 28, 2023 | Nov 29, 2023 | Form 4 ↗ |
| NASSETTA CHRISTOPHER JDirector | Sale | −1,500 | $77.86 | $117K | 273.6Kdirect | Nov 8, 2023 | Nov 9, 2023 | Form 4 ↗ |
| Ruggles LisaSenior VP, Global Research | Sale | −30.5K | $91.42 | $2.8M | 156.2Kdirect | Jun 30, 2023 | Jun 30, 2023 | Form 4 ↗ |
| Wheeler Scott TChief Financial Officer | Sale | −21.5K | $89.30 | $1.9M | 324.7Kdirect | Jun 28, 2023 | Jun 30, 2023 | Form 4 ↗ |
| SIMURO FRANKChief Technology Officer | Sale | −92.3K | $89.65 | $8.3M | 264.5Kdirect | Jun 27, 2023 | Jun 28, 2023 | Form 4 ↗ |
| Hill John WDirector | Sale | −1,500 | $86.57 | $130K | 16.9Kdirect | Jun 26, 2023 | Jun 28, 2023 | Form 4 ↗ |
| Wheeler Scott TChief Financial Officer | Sale | −24.7K | $80.68 | $2.0M | 346.2Kdirect | Jun 12, 2023 | Jun 14, 2023 | Form 4 ↗ |
| SAINT FREDERICK G.President, Marketplaces | Sale | −30.0K | $80.24 | $2.4M | 237.9Kdirect | Jun 7, 2023 | Jun 9, 2023 | Form 4 ↗ |
| FLORANCE ANDREW CPresident and CEO · Director | Sale | −360.5K | $76.77 | $27.7M | 974.3Kdirect | Apr 28, 2023 | May 2, 2023 | Form 4 ↗ |
| Hill John WDirector | Sale | −2,300 | $68.50 | $158K | 18.4Kdirect | Mar 31, 2023 | Apr 4, 2023 | Form 4 ↗ |
| DESMARAIS MICHAEL JChief Human Resources Officer | Sale | −5,600 | $70.36 | $394K | 44.8Kdirect | Mar 8, 2023 | Mar 9, 2023 | Form 4 ↗ |
| SIMURO FRANKChief Technology Officer | Sale | −35.2K | $70.09 | $2.5M | 337.6Kdirect | Mar 1, 2023 | Mar 3, 2023 | Form 4 ↗ |
| Hill John WDirector | Sale | −3,650 | $78.92 | $288K | 20.7Kdirect | Nov 3, 2022 | Nov 4, 2022 | Form 4 ↗ |
| DESMARAIS MICHAEL JChief Human Resources Officer | Sale | −1,296 | $82.81 | $107K | 36.9Kdirect | Oct 28, 2022 | Oct 31, 2022 | Form 4 ↗ |
| Hill John WDirector | Sale | −1,400 | $74.49 | $104K | 20.6Kdirect | Aug 10, 2022 | Aug 11, 2022 | Form 4 ↗ |
| KLEIN MICHAEL RDirector | Sale | −150.0K | $72.42 | $10.9M | 2.1Mdirect | Aug 5, 2022 | Aug 9, 2022 | Form 4 ↗ |
| DESMARAIS MICHAEL JChief Human Resources Officer | Sale | −2,000 | $72.51 | $145K | 39.6Kdirect | Aug 3, 2022 | Aug 5, 2022 | Form 4 ↗ |
| Hill John WDirector | Sale | −1,750 | $57.07 | $100K | 22.0Kdirect | May 24, 2022 | May 26, 2022 | Form 4 ↗ |
| DESMARAIS MICHAEL JChief Human Resources Officer | Sale | −1,000 | $63.14 | $63K | 41.6Kdirect | May 2, 2022 | May 4, 2022 | Form 4 ↗ |
| Ruggles LisaSenior VP, Global Research | Sale | −21.6K | $59.88 | $1.3M | 161.6Kdirect | Mar 2, 2022 | Mar 3, 2022 | Form 4 ↗ |
| Wheeler Scott TChief Financial Officer | Sale | −85 | $81.72 | $7K | 645indirect | Nov 11, 2021 | Nov 15, 2021 | Form 4 ↗ |
| NASSETTA CHRISTOPHER JDirector | Sale | −2,120 | $83.21 | $176K | 267.2Kdirect | Nov 10, 2021 | Nov 12, 2021 | Form 4 ↗ |
| Kaplan Laura CoxDirector | Sale | −4,040 | $83.29 | $336K | 7,139direct | Nov 5, 2021 | Nov 8, 2021 | Form 4 ↗ |
| Hill John WDirector | Sale | −9,235 | $86.97 | $803K | 23.9Kdirect | Oct 29, 2021 | Nov 2, 2021 | Form 4 ↗ |
| Hill John WDirector | Sale | −6,160 | $85.77 | $528K | 30.2Kdirect | Aug 9, 2021 | Aug 11, 2021 | Form 4 ↗ |
| Kaplan Laura CoxDirector | Sale | −1,062 | $869.03 | $923K | 830direct | Apr 30, 2021 | May 3, 2021 | Form 4 ↗ |
| SAINT FREDERICK G.President, Marketplaces | Sale | −7,834 | $831.70 | $6.5M | 24.2Kdirect | Mar 23, 2021 | Mar 25, 2021 | Form 4 ↗ |
| Wheeler Scott TChief Financial Officer | Sale | −7,326 | $843.28 | $6.2M | 27.4Kdirect | Mar 16, 2021 | Mar 17, 2021 | Form 4 ↗ |
| FLORANCE ANDREW CPresident and CEO · Director | Sale | −19.6K | $818.37 | $16.0M | 76.1Kdirect | Mar 10, 2021 | Mar 11, 2021 | Form 4 ↗ |
| Ruggles LisaSenior VP, Global Research | Sale | −7,596 | $870.00 | $6.6M | 14.5Kdirect | Sep 2, 2020 | Sep 3, 2020 | Form 4 ↗ |
| FLORANCE ANDREW CPresident and CEO · Director | Sale | −15.6K | $851.66 | $13.3M | 107.1Kdirect | Aug 27, 2020 | Aug 28, 2020 | Form 4 ↗ |
| FLORANCE ANDREW CPresident and CEO · Director | Sale | −15.6K | $848.16 | $13.2M | 107.1Kdirect | Aug 26, 2020 | Aug 28, 2020 | Form 4 ↗ |
| Linnington MatthewExecutive VP, Sales | Sale | −2,419 | $826.32 | $2.0M | 19.8Kdirect | Aug 12, 2020 | Aug 13, 2020 | Form 4 ↗ |
| Wheeler Scott TChief Financial Officer | Sale | −12.0K | $826.71 | $9.9M | 25.3Kdirect | Aug 4, 2020 | Aug 5, 2020 | Form 4 ↗ |
| KLEIN MICHAEL RDirector | Sale | −11.4K | $636.51 | $7.2M | 231.4Kdirect | May 7, 2020 | May 8, 2020 | Form 4 ↗ |
| KLEIN MICHAEL RDirector | Sale | −3,639 | $647.52 | $2.4M | 242.8Kdirect | May 6, 2020 | May 8, 2020 | Form 4 ↗ |
| Steinberg David JayDirector | Sale | −850 | $714.00 | $607K | 6,456direct | Mar 4, 2020 | Mar 5, 2020 | Form 4 ↗ |
| Wheeler Scott TChief Financial Officer | Sale | −6,005 | $703.26 | $4.2M | 28.5Kdirect | Mar 3, 2020 | Mar 3, 2020 | Form 4 ↗ |
| FLORANCE ANDREW CPresident and CEO · Director | Sale | −33.6K | $663.90 | $22.3M | 110.1Kdirect | Mar 2, 2020 | Mar 3, 2020 | Form 4 ↗ |
| Hill John WDirector | Sale | −500 | $591.90 | $296K | 3,406direct | Dec 31, 2019 | Jan 2, 2020 | Form 4 ↗ |
| Kaplan Laura CoxDirector | Sale | −576 | $591.60 | $341K | 1,671direct | Nov 19, 2019 | Nov 19, 2019 | Form 4 ↗ |
| NASSETTA CHRISTOPHER JDirector | Sale | −406 | $570.99 | $232K | 26.4Kdirect | Oct 25, 2019 | Oct 28, 2019 | Form 4 ↗ |
| Linnington MatthewExecutive VP, Sales | Sale | −14.7K | $617.39 | $9.0M | 21.8Kdirect | Jul 31, 2019 | Aug 1, 2019 | Form 4 ↗ |
| Wheeler Scott TChief Financial Officer | Sale | −6,933 | $629.50 | $4.4M | 29.3Kdirect | Jul 26, 2019 | Jul 30, 2019 | Form 4 ↗ |
| FLORANCE ANDREW CPresident and CEO · Director | Sale | −24.2K | $628.64 | $15.2M | 96.3Kdirect | Jul 26, 2019 | Jul 30, 2019 | Form 4 ↗ |
| Hill John WDirector | Sale | −315 | $553.23 | $174K | 3,563direct | Jun 24, 2019 | Jun 25, 2019 | Form 4 ↗ |
| FLORANCE ANDREW CPresident and CEO · Director | Sale | −55.3K | $473.38 | $26.2M | 129.4Kdirect | Mar 4, 2019 | Mar 4, 2019 | Form 4 ↗ |
| Ruggles LisaSenior VP, Global Research | Sale | −1,538 | $466.62 | $718K | 14.0Kdirect | Mar 1, 2019 | Mar 4, 2019 | Form 4 ↗ |
| Linnington MatthewExecutive VP, Sales | Sale | −4,701 | $477.31 | $2.2M | 26.7Kdirect | Mar 1, 2019 | Mar 4, 2019 | Form 4 ↗ |
| Wheeler Scott TChief Financial Officer | Sale | −5,396 | $476.11 | $2.6M | 30.3Kdirect | Mar 1, 2019 | Mar 4, 2019 | Form 4 ↗ |
| Hill John WDirector | Sale | −1,042 | $330.88 | $345K | 3,907direct | Dec 26, 2018 | Dec 28, 2018 | Form 4 ↗ |
| NASSETTA CHRISTOPHER JDirector | Sale | −571 | $349.67 | $200K | 26.5Kdirect | Oct 29, 2018 | Oct 30, 2018 | Form 4 ↗ |
| KLEIN MICHAEL RDirector | Sale | −15.0K | $420.69 | $6.3M | 264.7Kdirect | Aug 6, 2018 | Aug 7, 2018 | Form 4 ↗ |
| Linnington MatthewExecutive VP, Sales | Sale | −4,384 | $411.93 | $1.8M | 26.9Kdirect | Jul 30, 2018 | Jul 31, 2018 | Form 4 ↗ |
| Wheeler Scott TChief Financial Officer | Sale | −4,700 | $426.02 | $2.0M | 28.5Kdirect | Jul 27, 2018 | Jul 31, 2018 | Form 4 ↗ |
| CARCHEDI FRANCISExecutive VP, Corp. Dev. | Sale | −32.7K | $421.87 | $13.8M | 21.3Kdirect | Jul 27, 2018 | Jul 31, 2018 | Form 4 ↗ |
| FLORANCE ANDREW CPresident and CEO · Director | Sale | −5,839 | $369.05 | $2.2M | 119.8Kdirect | Apr 30, 2018 | Apr 30, 2018 | Form 4 ↗ |
| FLORANCE ANDREW CPresident and CEO · Director | Sale | −11.2K | $371.15 | $4.2M | 125.7Kdirect | Apr 27, 2018 | Apr 30, 2018 | Form 4 ↗ |
| FLORANCE ANDREW CPresident and CEO · Director | Sale | −7,782 | $372.34 | $2.9M | 136.9Kdirect | Apr 26, 2018 | Apr 30, 2018 | Form 4 ↗ |
| Hill John WDirector | Sale | −1,150 | $361.28 | $415K | 4,498direct | Mar 29, 2018 | Mar 30, 2018 | Form 4 ↗ |
| KLEIN MICHAEL RDirector | Sale | −3,000 | $361.61 | $1.1M | 289.7Kdirect | Mar 22, 2018 | Mar 23, 2018 | Form 4 ↗ |
| CARCHEDI FRANCISExecutive VP, Corp. Dev. | Sale | −12.1K | $356.09 | $4.3M | 28.6Kdirect | Mar 7, 2018 | Mar 9, 2018 | Form 4 ↗ |
| Wheeler Scott TChief Financial Officer | Sale | −1,250 | $353.69 | $442K | 29.8Kdirect | Mar 5, 2018 | Mar 6, 2018 | Form 4 ↗ |
| Linnington MatthewExecutive VP, Sales | Sale | −1,153 | $348.45 | $402K | 30.3Kdirect | Mar 2, 2018 | Mar 6, 2018 | Form 4 ↗ |
| Linnington MatthewExecutive VP, Sales | Sale | −6,768 | $348.19 | $2.4M | 31.4Kdirect | Mar 2, 2018 | Mar 6, 2018 | Form 4 ↗ |
| FLORANCE ANDREW CPresident and CEO · Director | Sale | −80.1K | $347.10 | $27.8M | 133.9Kdirect | Feb 27, 2018 | Mar 1, 2018 | Form 4 ↗ |
| Linnington MatthewExecutive VP, Sales | Sale | −1,767 | $273.15 | $483K | 27.6Kdirect | Jul 31, 2017 | Aug 1, 2017 | Form 4 ↗ |
| KLEIN MICHAEL RDirector | Sale | −20.0K | $265.01 | $5.3M | 310.5Kdirect | Jun 26, 2017 | Jun 27, 2017 | Form 4 ↗ |
| FLORANCE ANDREW CPresident and CEO · Director | Sale | −21.8K | $244.19 | $5.3M | 148.9Kdirect | May 3, 2017 | May 3, 2017 | Form 4 ↗ |
| Hill John WDirector | Sale | −440 | $244.52 | $108K | 4,953direct | May 2, 2017 | May 3, 2017 | Form 4 ↗ |
| CARCHEDI FRANCISExecutive VP, Corp. Dev. | Sale | −5,500 | $245.04 | $1.3M | 25.0Kdirect | May 2, 2017 | May 3, 2017 | Form 4 ↗ |
| FLORANCE ANDREW CPresident and CEO · Director | Sale | −21.8K | $244.73 | $5.3M | 148.9Kdirect | May 2, 2017 | May 3, 2017 | Form 4 ↗ |
| Wheeler Scott TChief Financial Officer | Sale | −757 | $240.00 | $182K | 23.3Kdirect | May 1, 2017 | May 3, 2017 | Form 4 ↗ |
| Linnington MatthewExecutive VP, Sales | Sale | −1,037 | $240.00 | $249K | 28.3Kdirect | May 1, 2017 | May 3, 2017 | Form 4 ↗ |
| CARCHEDI FRANCISExecutive VP, Corp. Dev. | Sale | −2,448 | $205.30 | $503K | 25.7Kdirect | Mar 6, 2017 | Mar 7, 2017 | Form 4 ↗ |
| CARCHEDI FRANCISExecutive VP, Corp. Dev. | Sale | −4,500 | $204.98 | $922K | 29.0Kdirect | Mar 2, 2017 | Mar 2, 2017 | Form 4 ↗ |
| FLORANCE ANDREW CPresident and CEO · Director | Sale | −26.3K | $205.31 | $5.4M | 155.2Kdirect | Mar 2, 2017 | Mar 2, 2017 | Form 4 ↗ |
| NASSETTA CHRISTOPHER JDirector | Sale | −75 | $187.30 | $14K | 25.8Kdirect | Nov 1, 2016 | Nov 1, 2016 | Form 4 ↗ |
| NASSETTA CHRISTOPHER JDirector | Sale | −500 | $187.73 | $94K | 25.9Kdirect | Oct 31, 2016 | Nov 1, 2016 | Form 4 ↗ |
| Linnington MatthewExecutive VP, Sales | Sale | −1,060 | $188.31 | $200K | 20.4Kdirect | Oct 31, 2016 | Nov 1, 2016 | Form 4 ↗ |
| Glosserman Michael JDirector | Sale | −5,000 | $206.33 | $1.0M | 7,232direct | Aug 1, 2016 | Aug 2, 2016 | Form 4 ↗ |
| CARCHEDI FRANCISExecutive VP, Operations | Sale | −3,414 | $201.65 | $688K | 19.7Kdirect | Nov 13, 2015 | Nov 16, 2015 | Form 4 ↗ |
| FLORANCE ANDREW CPresident and CEO · Director | Sale | −17.6K | $205.10 | $3.6M | 136.1Kdirect | Nov 11, 2015 | Nov 12, 2015 | Form 4 ↗ |
| Steinberg David JayDirector | Sale | −1,225 | $204.82 | $251K | 3,875direct | Jun 15, 2015 | Jun 16, 2015 | Form 4 ↗ |
| Radecki Brian JChief Financial Officer | Sale | −4,500 | $192.53 | $866K | 41.5Kdirect | Mar 13, 2015 | Mar 13, 2015 | Form 4 ↗ |
| CARCHEDI FRANCISExecutive VP, Operations | Sale | −5,910 | $191.05 | $1.1M | 24.6Kdirect | Mar 9, 2015 | Mar 9, 2015 | Form 4 ↗ |
| Radecki Brian JChief Financial Officer | Sale | −14.6K | $197.14 | $2.9M | 30.3Kdirect | Mar 2, 2015 | Mar 3, 2015 | Form 4 ↗ |
| FLORANCE ANDREW CPresident and CEO · Director | Sale | −33.2K | $197.90 | $6.6M | 135.0Kdirect | Mar 2, 2015 | Mar 3, 2015 | Form 4 ↗ |
| NASSETTA CHRISTOPHER JDirector | Sale | −3,242 | $148.11 | $480K | 23.1Kdirect | Aug 26, 2014 | Aug 27, 2014 | Form 4 ↗ |
| HABER WARREN HDirector | Sale | −2,189 | $147.74 | $323K | 116.7Kdirect | Aug 19, 2014 | Aug 21, 2014 | Form 4 ↗ |
| CARCHEDI FRANCISExecutive VP, Operations | Sale | −6,000 | $207.75 | $1.2M | 23.6Kdirect | Mar 14, 2014 | Mar 18, 2014 | Form 4 ↗ |
| Stanfill John LSr. VP-Sales, Customer Service | Sale | −5,789 | $207.60 | $1.2M | 15.3Kdirect | Mar 11, 2014 | Mar 12, 2014 | Form 4 ↗ |
| Stanfill John LSr. VP-Sales, Customer Service | Sale | −20.1K | $208.82 | $4.2M | 15.3Kdirect | Mar 10, 2014 | Mar 12, 2014 | Form 4 ↗ |
| Radecki Brian JChief Financial Officer | Sale | −12.0K | $209.12 | $2.5M | 39.0Kdirect | Mar 7, 2014 | Mar 11, 2014 | Form 4 ↗ |
| Radecki Brian JChief Financial Officer | Sale | −9,300 | $208.45 | $1.9M | 50.9Kdirect | Mar 7, 2014 | Mar 11, 2014 | Form 4 ↗ |
| FLORANCE ANDREW CPresident and CEO · Director | Sale | −50.0K | $210.04 | $10.5M | 187.4Kdirect | Mar 6, 2014 | Mar 10, 2014 | Form 4 ↗ |
| Radecki Brian JChief Financial Officer | Sale | −4,000 | $181.02 | $724K | 62.2Kdirect | Nov 22, 2013 | Nov 22, 2013 | Form 4 ↗ |
| CARCHEDI FRANCISExecutive VP, Operations | Sale | −3,500 | $181.04 | $634K | 32.2Kdirect | Nov 22, 2013 | Nov 22, 2013 | Form 4 ↗ |
| Radecki Brian JChief Financial Officer | Sale | −2,500 | $180.91 | $452K | 66.2Kdirect | Nov 21, 2013 | Nov 22, 2013 | Form 4 ↗ |
| CARCHEDI FRANCISExecutive VP, Operations | Sale | −4,000 | $180.81 | $723K | 32.2Kdirect | Nov 21, 2013 | Nov 22, 2013 | Form 4 ↗ |
| Radecki Brian JChief Financial Officer | Sale | −2,000 | $177.23 | $354K | 68.7Kdirect | Nov 20, 2013 | Nov 22, 2013 | Form 4 ↗ |
| CARCHEDI FRANCISExecutive VP, Operations | Sale | −2,500 | $177.23 | $443K | 32.2Kdirect | Nov 20, 2013 | Nov 22, 2013 | Form 4 ↗ |
| Stanfill John LSr. VP-Sales, Customer Service | Sale | −548 | $171.73 | $94K | 44.8Kdirect | Nov 12, 2013 | Nov 13, 2013 | Form 4 ↗ |
| FLORANCE ANDREW CPresident and CEO · Director | Sale | −54.4K | $179.08 | $9.7M | 293.2Kdirect | Oct 28, 2013 | Oct 30, 2013 | Form 4 ↗ |
| Kitchen JenniferSr. Vice President, Research | Sale | −2,750 | $160.85 | $442K | 22.2Kdirect | Sep 9, 2013 | Sep 11, 2013 | Form 4 ↗ |
| NASSETTA CHRISTOPHER JDirector | Sale | −1,015 | $147.89 | $150K | 20.2Kdirect | Aug 27, 2013 | Aug 27, 2013 | Form 4 ↗ |
| HABER WARREN HDirector | Sale | −1,396 | $153.53 | $214K | 110.8Kdirect | Aug 20, 2013 | Aug 22, 2013 | Form 4 ↗ |
| NASSETTA CHRISTOPHER JDirector | Sale | −1,800 | $158.71 | $286K | 18.0Kdirect | Aug 2, 2013 | Aug 6, 2013 | Form 4 ↗ |
| Radecki Brian JChief Financial Officer | Sale | −10.3K | $157.00 | $1.6M | 70.7Kdirect | Jul 30, 2013 | Aug 1, 2013 | Form 4 ↗ |
| CARCHEDI FRANCISExecutive VP, Operations | Sale | −10.3K | $157.00 | $1.6M | 32.2Kdirect | Jul 30, 2013 | Aug 1, 2013 | Form 4 ↗ |
| FLORANCE ANDREW CPresident and CEO · Director | Sale | −30.5K | $157.03 | $4.8M | 293.2Kdirect | Jul 30, 2013 | Jul 31, 2013 | Form 4 ↗ |
| FLORANCE ANDREW CPresident and CEO · Director | Sale | −4,234 | $157.00 | $665K | 293.2Kdirect | Jul 29, 2013 | Jul 31, 2013 | Form 4 ↗ |
| FLORANCE ANDREW CPresident and CEO · Director | Sale | −37.4K | $155.86 | $5.8M | 293.2Kdirect | Jul 29, 2013 | Jul 31, 2013 | Form 4 ↗ |
| FLORANCE ANDREW CPresident and CEO · Director | Sale | −26.3K | $100.14 | $2.6M | 289.2Kdirect | Mar 15, 2013 | Mar 18, 2013 | Form 4 ↗ |
| FLORANCE ANDREW CPresident and CEO · Director | Sale | −30.0K | $99.68 | $3.0M | 295.4Kdirect | Mar 14, 2013 | Mar 18, 2013 | Form 4 ↗ |
| Kitchen JenniferSr. Vice President, Research | Sale | −16.1K | $100.01 | $1.6M | 25.0Kdirect | Mar 13, 2013 | Mar 13, 2013 | Form 4 ↗ |
| Stanfill John LSr. VP-Sales, Customer Service | Sale | −14.6K | $101.10 | $1.5M | 45.8Kdirect | Mar 12, 2013 | Mar 13, 2013 | Form 4 ↗ |
| CARCHEDI FRANCISExecutive VP, Operations | Sale | −9,675 | $102.74 | $994K | 25.4Kdirect | Mar 5, 2013 | Mar 6, 2013 | Form 4 ↗ |
| Radecki Brian JChief Financial Officer | Sale | −9,333 | $104.00 | $971K | 63.8Kdirect | Mar 5, 2013 | Mar 6, 2013 | Form 4 ↗ |
| Radecki Brian JChief Financial Officer | Sale | −11.3K | $103.00 | $1.2M | 63.8Kdirect | Mar 5, 2013 | Mar 6, 2013 | Form 4 ↗ |
| FLORANCE ANDREW CPresident and CEO · Director | Sale | −32.3K | $102.85 | $3.3M | 268.3Kdirect | Mar 4, 2013 | Mar 6, 2013 | Form 4 ↗ |
| Radecki Brian JChief Financial Officer | Sale | −17.5K | $89.00 | $1.6M | 65.7Kdirect | Dec 31, 2012 | Jan 3, 2013 | Form 4 ↗ |
| KLEIN MICHAEL RDirector | Sale | −43.1K | $81.74 | $3.5M | 321.4Kdirect | Sep 20, 2012 | Sep 20, 2012 | Form 4 ↗ |
| KLEIN MICHAEL RDirector | Sale | −29.8K | $83.34 | $2.5M | 364.5Kdirect | Sep 19, 2012 | Sep 20, 2012 | Form 4 ↗ |
| KLEIN MICHAEL RDirector | Sale | −27.0K | $82.94 | $2.2M | 394.4Kdirect | Sep 18, 2012 | Sep 20, 2012 | Form 4 ↗ |
| Kitchen JenniferSr. Vice President, Research | Sale | −1,000 | $82.22 | $82K | 25.7Kdirect | Sep 13, 2012 | Sep 13, 2012 | Form 4 ↗ |
| Stanfill John LSr. VP-Sales, Customer Service | Sale | −34.5K | $81.84 | $2.8M | 45.7Kdirect | Sep 6, 2012 | Sep 6, 2012 | Form 4 ↗ |
| FLORANCE ANDREW CPresident and CEO · Director | Sale | −56.4K | $80.10 | $4.5M | 309.2Kdirect | Aug 1, 2012 | Aug 2, 2012 | Form 4 ↗ |
| Marples PaulManaging Director, CoStar UK | Sale | −1,000 | $84.98 | $85K | 28.6Kdirect | Jul 30, 2012 | Aug 1, 2012 | Form 4 ↗ |
| NASSETTA CHRISTOPHER JDirector | Sale | −1,473 | $77.71 | $114K | 16.9Kdirect | Jun 11, 2012 | Jun 12, 2012 | Form 4 ↗ |
| Radecki Brian JChief Financial Officer | Sale | −4,509 | $71.75 | $324K | 65.7Kdirect | May 23, 2012 | May 24, 2012 | Form 4 ↗ |
| Radecki Brian JChief Financial Officer | Sale | −1,253 | $71.50 | $90K | 70.2Kdirect | May 22, 2012 | May 24, 2012 | Form 4 ↗ |
| Radecki Brian JChief Financial Officer | Sale | −19.5K | $71.00 | $1.4M | 71.5Kdirect | May 22, 2012 | May 24, 2012 | Form 4 ↗ |
| FLORANCE ANDREW CPresident and CEO · Director | Sale | −27.7K | $70.08 | $1.9M | 319.2Kdirect | May 17, 2012 | May 21, 2012 | Form 4 ↗ |
| Marples PaulManaging Director, CoStar UK | Sale | −1,000 | $70.01 | $70K | 29.6Kdirect | May 11, 2012 | May 15, 2012 | Form 4 ↗ |
| Radecki Brian JChief Financial Officer | Sale | −60 | $70.50 | $4K | 71.5Kdirect | May 11, 2012 | May 15, 2012 | Form 4 ↗ |
| Stanfill John LSr. VP-Sales, Customer Service | Sale | −11.9K | $70.13 | $831K | 80.7Kdirect | May 7, 2012 | May 8, 2012 | Form 4 ↗ |
| Radecki Brian JChief Financial Officer | Sale | −7,815 | $70.50 | $551K | 71.5Kdirect | May 7, 2012 | May 8, 2012 | Form 4 ↗ |
| Stanfill John LSr. VP-Sales, Customer Service | Sale | −8,000 | $70.57 | $565K | 80.7Kdirect | May 4, 2012 | May 8, 2012 | Form 4 ↗ |
| Kitchen JenniferSr. Vice President, Research | Sale | −17.6K | $70.42 | $1.2M | 26.7Kdirect | May 4, 2012 | May 8, 2012 | Form 4 ↗ |
| Radecki Brian JChief Financial Officer | Sale | −2,711 | $70.78 | $192K | 71.5Kdirect | May 4, 2012 | May 8, 2012 | Form 4 ↗ |
| Marples PaulManaging Director, CoStar UK | Sale | −1,000 | $62.69 | $63K | 31.2Kdirect | Mar 9, 2012 | Mar 13, 2012 | Form 4 ↗ |
| FLORANCE ANDREW CPresident and CEO · Director | Sale | −20.0K | $62.93 | $1.3M | 186.5Kdirect | Nov 4, 2011 | Nov 7, 2011 | Form 4 ↗ |
| FLORANCE ANDREW CPresident and CEO · Director | Sale | −45.1K | $59.33 | $2.7M | 206.5Kdirect | Nov 1, 2011 | Nov 3, 2011 | Form 4 ↗ |
| Marples PaulManaging Director, FOCUS | Sale | −1,500 | $68.00 | $102K | 16.3Kdirect | May 3, 2011 | May 4, 2011 | Form 4 ↗ |
| Kitchen JenniferSr. Vice President, Research | Sale | −9,267 | $68.45 | $634K | 10.9Kdirect | May 2, 2011 | May 4, 2011 | Form 4 ↗ |
| Kitchen JenniferSr. Vice President, Research | Sale | −3,500 | $68.50 | $240K | 20.1Kdirect | May 2, 2011 | May 4, 2011 | Form 4 ↗ |
| Stanfill John LSr. VP-Sales, Customer Service | Sale | −5,198 | $68.17 | $354K | 52.1Kdirect | May 2, 2011 | May 4, 2011 | Form 4 ↗ |
| Stanfill John LSr. VP-Sales, Customer Service | Sale | −5,804 | $68.30 | $396K | 57.3Kdirect | May 2, 2011 | May 4, 2011 | Form 4 ↗ |
| Marples PaulManaging Director, FOCUS | Sale | −1,500 | $57.25 | $86K | 15.9Kdirect | Mar 4, 2011 | Mar 8, 2011 | Form 4 ↗ |
| KLEIN MICHAEL RDirector | Sale | −500.0K | n/c | — | 410.7Kdirect | Nov 11, 2010 | Nov 12, 2010 | Form 4 ↗ |
| Marples PaulManaging Director, FOCUS | Sale | −1,250 | $50.38 | $63K | 19.5Kdirect | Oct 26, 2010 | Oct 27, 2010 | Form 4 ↗ |
| Stanfill John LSr. VP-Sales, Customer Service | Sale | −3,167 | $50.41 | $160K | 48.9Kdirect | Oct 25, 2010 | Oct 26, 2010 | Form 4 ↗ |
| Kitchen JenniferSr. Vice President, Research | Sale | −2,951 | $45.09 | $133K | 10.7Kdirect | Sep 14, 2010 | Sep 16, 2010 | Form 4 ↗ |
| FLORANCE ANDREW CPresident and CEO · Director | Sale | −9,883 | $44.66 | $441K | 222.5Kdirect | Aug 9, 2010 | Aug 11, 2010 | Form 4 ↗ |
| FLORANCE ANDREW CPresident and CEO · Director | Sale | −3,855 | $44.08 | $170K | 222.5Kdirect | Aug 5, 2010 | Aug 6, 2010 | Form 4 ↗ |
| FLORANCE ANDREW CPresident and CEO · Director | Sale | −8,725 | $44.35 | $387K | 222.5Kdirect | Aug 4, 2010 | Aug 6, 2010 | Form 4 ↗ |
| Marples PaulManaging Director, FOCUS | Sale | −200 | $45.00 | $9K | 20.8Kdirect | Apr 29, 2010 | Apr 29, 2010 | Form 4 ↗ |
| Marples PaulManaging Director, FOCUS | Sale | −3,800 | $45.01 | $171K | 21.0Kdirect | Apr 27, 2010 | Apr 29, 2010 | Form 4 ↗ |
| FLORANCE ANDREW CPresident and CEO · Director | Sale | −3,600 | $39.34 | $142K | 208.3Kdirect | Oct 29, 2009 | Oct 29, 2009 | Form 4 ↗ |
| FLORANCE ANDREW CPresident and CEO · Director | Sale | −8,000 | $39.76 | $318K | 211.9Kdirect | Oct 28, 2009 | Oct 29, 2009 | Form 4 ↗ |
| FLORANCE ANDREW CPresident and CEO · Director | Sale | −22.0K | $40.56 | $892K | 219.9Kdirect | Oct 27, 2009 | Oct 29, 2009 | Form 4 ↗ |
| FLORANCE ANDREW CPresident and CEO · Director | Sale | −12.9K | $41.03 | $531K | 219.9Kdirect | Oct 27, 2009 | Oct 29, 2009 | Form 4 ↗ |
| Marples PaulManaging Director, FOCUS | Sale | −570 | $39.99 | $23K | 23.0Kdirect | Sep 16, 2009 | Sep 17, 2009 | Form 4 ↗ |
| FLORANCE ANDREW CPresident and CEO · Director | Sale | −25.4K | $52.21 | $1.3M | 205.7Kdirect | May 7, 2008 | May 7, 2008 | Form 4 ↗ |
| Marples PaulManaging Director, FOCUS | Sale | −7,500 | $50.05 | $375K | 21.7Kdirect | May 6, 2008 | May 7, 2008 | Form 4 ↗ |
| FLORANCE ANDREW CPresident and CEO · Director | Sale | −30.0K | $56.28 | $1.7M | 193.1Kdirect | Oct 30, 2007 | Oct 31, 2007 | Form 4 ↗ |
| FLORANCE ANDREW CPresident and CEO · Director | Sale | −121.2K | $57.40 | $7.0M | 223.0Kdirect | Oct 29, 2007 | Oct 31, 2007 | Form 4 ↗ |
| CARCHEDI FRANCISOfficer | Sale | −11.3K | $58.04 | $653K | 38.5Kdirect | Aug 9, 2007 | Aug 9, 2007 | Form 4 ↗ |
| CARCHEDI FRANCISOfficer | Sale | −20.0K | $51.44 | $1.0M | 38.5Kdirect | Jul 30, 2007 | Jul 31, 2007 | Form 4 ↗ |
| FLORANCE ANDREW CPresident and CEO · Director | Sale | −31.7K | $48.09 | $1.5M | 211.1Kdirect | Feb 28, 2007 | Mar 2, 2007 | Form 4 ↗ |
| FARRINGTON CRAIGVice President, Research | Sale | −12.5K | $50.03 | $625K | 3,800direct | Dec 4, 2006 | Dec 5, 2006 | Form 4 ↗ |
| CARCHEDI FRANCISChief Financial Officer | Sale | −15.0K | $50.35 | $754K | 21.6Kdirect | Nov 17, 2006 | Nov 20, 2006 | Form 4 ↗ |
| CARCHEDI FRANCISChief Financial Officer | Sale | −20.0K | $50.71 | $1.0M | 21.6Kdirect | Nov 16, 2006 | Nov 20, 2006 | Form 4 ↗ |
| CARCHEDI FRANCISChief Financial Officer | Sale | −14.5K | $56.06 | $811K | 17.8Kdirect | May 2, 2006 | May 4, 2006 | Form 4 ↗ |
| FLORANCE ANDREW CPresident and CEO · Director | Sale | −33.3K | $56.34 | $1.9M | 157.7Kdirect | May 2, 2006 | May 4, 2006 | Form 4 ↗ |
| KLEIN MICHAEL RDirector | Sale | −16.5K | $51.70 | $853K | 902.6Kdirect | Mar 29, 2006 | Mar 30, 2006 | Form 4 ↗ |
| KLEIN MICHAEL RDirector | Sale | −15.0K | $51.20 | $769K | 919.1Kdirect | Mar 28, 2006 | Mar 30, 2006 | Form 4 ↗ |
| KLEIN MICHAEL RDirector | Sale | −8,097 | $51.00 | $413K | 934.1Kdirect | Mar 16, 2006 | Mar 20, 2006 | Form 4 ↗ |
| FARRINGTON CRAIGVice President, Research | Sale | −2,798 | $50.97 | $143K | 1,848direct | Mar 16, 2006 | Mar 16, 2006 | Form 4 ↗ |
| FARRINGTON CRAIGVice President, Research | Sale | −2,162 | $50.95 | $110K | 4,646direct | Mar 16, 2006 | Mar 16, 2006 | Form 4 ↗ |
| KLEIN MICHAEL RDirector | Sale | −17.0K | $51.06 | $866K | 942.2Kdirect | Mar 15, 2006 | Mar 15, 2006 | Form 4 ↗ |
| KLEIN MICHAEL RDirector | Sale | −13.4K | $51.17 | $686K | 959.1Kdirect | Mar 14, 2006 | Mar 15, 2006 | Form 4 ↗ |
| KLEIN MICHAEL RDirector | Sale | −30.0K | $51.96 | $1.6M | 972.6Kdirect | Mar 13, 2006 | Mar 15, 2006 | Form 4 ↗ |
Source: SEC EDGAR Form 4 and Form 5 filings, SEC's quarterly bulk dataset through Jun 30, 2026, and KeyVex's half-hourly read of new filings since. Every row links its filing. Amendments are marked. Nothing here is a recommendation. All insider activity, market-wide →