The account was previously held by Equity Dynamics.
The brief will see Pagefield provide support across media relations, campaigns and regional PR. The agency will also work with BGF to promote the growth of the businesses it invests in.
Founded in 2011, BGF is a private equity-style investor backed with £2.5bn fund from Barclays, HSBC, Lloyds, RBS and Standard Chartered. BGF’s aim is to fill a gap in the funding market for companies with turnovers of £5m to £100m.
Jon Rhodes, BGF’s director of marketing and comms, said the organisation had invested in almost 100 high-growth small companies to date. "As the economy continues to strengthen, it feels like the right time to promote these businesses and explain how we are helping them to succeed."
Oliver Foster, managing partner at Pagefield, said: "BGF has an incredibly strong story to tell and we are looking forward to working with it to tell it."