The business has been renamed Bauer Media Outdoor.
More Bauer Media articles
The company sold its stake in Octave to News UK last month.
The agreement marks the end of a five-year joint venture, giving News UK sole ownership of the digital audio marketplace.
Commercial radio listening fell modestly from Q3 to Q4 to 39.9m, but listeners still grew by 2% year on year.
The acquisition steps up competition with rival Global, which moved into OOH in 2018.
Commercial radio has been performing strongly, but it has hit back at two major BBC developments.
At The Future of Media London, Bauer radio presenters Ken Bruce and Fleur East chatted about how technology has changed radio production and shared takeaways for leaders and career highlights.
A total of eight media owners presented their ideas to advertisers and agencies.
Commercial radio grew listening by 2.1% year on year in Q3, despite a quarter-on-quarter decline. The BBC showed resilience, but Global and Bauer continued to grow audiences at their top brands.
Bauer Media will help combat “shockingly common” issues associated with social media, the company’s ad chief has pledged in a blistering attack on online tech.
