Sir Martin Sorrell's also hired former Ogilvy CEO Miles Young as a non-executive director.
The S4 Capital chief remains bullish about a Q4 recovery.
Like-for like revenue rose 41% in what Martin Sorrell called an "outstandingly successful" first full financial year.
Sorrell is merging Circus with S4's global content practice, which is built around MediaMonks.
MediaMonks adds 50 experts to its team and intends to double its India business in the coming six months.
IMA - part of Martin Sorrell's digital ad and marketing services company - is planting its West Coast flag.
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