How do we find which real estate companies hold the market share in a county or city.?I live in great neck, NY, 11021. I'm trying to find who are the top listing companies in my area. Any link or help would be appreciated.November 06 2013 - Great Neck00YesReport a ProblemProblemSelect oneOffensive contentIrrelevant contentSpam (pure self-promotion)OtherDetailsYour emailPlease enter a valid email address.Submit CancelContent flaggedWe will review this content. Thanks for helping make the site more useful to everyone. To learn more, read Zillow's Good Neighbor Policy.We're sorry. This service is temporarily unavailable. Please come back later and try again.