The bid, from the investment fund Macquarie Capital Alliance and Macquarie Bank, the largest investment bank in Australia, sees the two companies respectively own 65 per cent and 35 per cent of the division through their jointly owned company Creative Broadcast Services Ltd.
BBC Broadcast creates in-house trailers for the BBC and ads for clients such as McDonald's and Woolworths, as well as maintaining lucrative transmission contracts with the BBC and UKTV.
The sale follows on from the BBC's internal review of its commercial businesses, and sees all 1,100 staff taken off the BBC payroll, with a pledge by the new owners to honour a one-year moratorium on compulsory redundancies.
Following approval from the Department of Culture, Media and Sport, the sale permits BBC Broadcast to use the BBC name for three months before it must rebrand.