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Professional Services
Advertising & Market Research
232 active companies in HARROW
73110 · Advertising agencies
73120 · Media representation
73200 · Market research and public opinion polli
1Essencemediacom Holdings Limited£449.7M2Wpp Media Uk Limited£187.5M3Mindshare Media Uk Limited£141.5M4Determination Innovation And Production Limited£100.0M5Essencemediacom North Limited£58.9M6Caa Sports Uk Limited£40.6M+£40.6M7Essencemediacom Scotland Limited£34.9M8Meta Petroleum Ltd£32.8M+£3.0M9Ptarmigan Media Group Limited£27.5M+£15.4M10Magnite Limited£27.0M+£7.1M