Why insider trading matters?

Numerous studies have examined whether there is evidence that U.S. insiders systematically trade on private information despite the legal deterrence. The consensus appears to be that insider purchases (but not sales) tend to be followed by positive abnormal stock price performance, particularly for small growth stocks.

- Prof. B. Espen Eckbo, Dartmouth College
Sector: Real Estate; Industry: Real Estate Services

CoStar Group, Inc. provides information, analytics, and online marketplaces to the commercial real estate industry in the United States and the United Kingdom. It also provides CoStar COMPS Professional that covers comparable commercial real estate sales information; CoStar Market Analytics to view and report on aggregated market and submarket trends; CoStar Tenant, an online business-to-business prospecting and analytical tool; CoStar Lease Comps, a solution to capture, manage, and maintain lease data; CoStar Lease Analysis, a workflow tool; and CoStar Public Record, a searchable database of commercially-zoned parcels. Further, it provides apartment marketing sites, such as Apartments.com, ApartmentFinder.com, ForRent.com, ApartmentHomeLiving.com, Apartamentos.com, WestsideRentals.com, AFTER55.com, CorporateHousing.com and ForRentUniversity.com; LoopNet Premium Lister and LoopNet Signature Ads for commercial real estate professionals; Realla, a commercial property listings and data management platform; LandsofAmerica, LandAndFarm, and LandWatch online marketplaces for rural land for sale; and BizBuySell, BizQuest, FindaFranchise online marketplaces for operating businesses for sale. CoStar Group, Inc. was founded in 1987 and is headquartered in Washington, the District of Columbia.

Trade Date Insider Title Buy/Sell #Shares Price Value Option
2020-08-12 Linnington Matthew Executive VP, Sales Sell 2,419 $826.32 $1,998,868 No
2019-07-31 Linnington Matthew Executive VP, Sales Sell 14,651 $617.39 $9,045,381 Yes
2019-03-01 Linnington Matthew Executive VP, Sales Sell 4,701 $477.31 $2,243,834 Yes
2018-07-30 Linnington Matthew Executive VP, Sales Sell 4,384 $411.93 $1,805,901 Yes
2018-03-05 Linnington Matthew Executive VP, Sales Sell 7,921 $348.23 $2,758,313 Yes
2017-07-31 Linnington Matthew Executive VP, Sales Sell 1,767 $273.15 $482,656 Yes
2017-05-01 Linnington Matthew Executive VP, Sales Sell 1,037 $240.00 $248,880 No
2016-10-31 Linnington Matthew Executive VP, Sales Sell 1,060 $188.31 $199,609 No

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