PR and marketing group Next 15 said US growth propelled an eight percent gain in organic revenue for the eleven months ended Dec. 31, 2015.

Revenues topped $169M for the period, up 19% over the same period of 2014. The group said momentum in the US and UK remains strong, in part because of an increased proportion of revenue from digital products and services.

Next 15's agencies include Bite, The OutCast Agency, Text 100, M Booth and The BlueshirtGroup.