• by Fern Siegel , May 6, 2025

Gain, a creative date-driven agency, has named Jennifer Black its first Chief Growth Officer, after the business underwent a significant restructure and rebrand. It was previously known as the Sideshow Group.

Eleven specialist agency brands are now under the Gain umbrella, focused on creative studios, experience, conversion, performance and customer service.

Black is responsible for growth strategy, market expansion and generating revenue. She reports to Group CEO Craig Sher.

Before her appointment she was CEO at Special London. Prior to that, she was managing director at Havas London. Black has held various agency roles at Fallon London and Mother London. She founded the Fabula London agency in 2013 and clients included Unilever and 20th Century Fox.

Her client worm has included Coca-Cola, Cadbury, Mondelez, IKEA, O2, ASDA and Molson Coors.

Sher called her “an inspirational leader with charisma, vision, drive, credibility and experience.”

Gain's philosophy is "Rebel Thinking, Real Results." The company operates in five countries with 650 staffers, controlling billing of more than $86 million.

Waterland Private Equity, which partnered with the agency in 2021, will continue to back its growth agenda.