GroupM: Top 25 Media Cos Surpass $427 Billion In Ad Spending
- by Joe Mandese @mp_joemandese, June 21, 2021
The top 25 media companies now represent more than $427 billion -- two-thirds of all ad spending -- according to an analysis of company reports for 2020, compiled by GroupM's Business Intelligence unit.
That's up from a 42% share of total ad spending just four years ago, illustrating just …
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