In a trading update ahead of its full-year results for the year to 31 January, the owner of PR shops Bite, Lexis, M Booth, Outcast, and The Blueshirt Group said it "continues to trade in line with management expectations".
The group said momentum remained strong in the US and the UK in particular, "thanks to the increased proportion of revenues now derived from digital products and services".
Overall revenue (including acquisitions) over the 11 months grew 19 per cent to £118m ($169m).
The company today reiterated its expansion plan, saying it expected to make further acquisitions in the first half of 2016 "as it continues to strengthen its digital capabilities".
"The group will also invest in the expansion of some of its UK businesses as they look to enter the US market," it stated.
Next 15, which is led by CEO Tim Dyson, is to announce its full-year results on 12 April.