1. Sotheby’s International Realty
2. Christie’s International Real Estate
3. Coldwell Banker Global Luxury
4. Compass Luxury Division
5. Berkshire Hathaway HomeServices Luxury Collection
6. Keller Williams Luxury Homes
7. Douglas Elliman Luxury Real Estate
8. Engel & Völkers
9. The Agency
10. Hilton & Hyland