Although financial terms of the deal were not disclosed, Catalyst typically invests in businesses with enterprise values of between A$50m and A$250m, according to its website.
Catalyst said RBIA, which provides publications and websites for professionals in sectors such as health, finance and mining, would be rebranded over the next six months.
The company also owns and operates online directories including ferret.com.au, hotfrog.com.au, gohospitality.com.au and infolink.com.au.
“The important role of leading and niche publications with multi channel operations and deep reach into target audiences is only increasing,” Catalyst managing director Trent Peterson said in a statement.
“RBIA’s broad portfolio of titles and formats, spanning a wide range of channels to market and industry verticals, puts the company in a strong position to deliver outstanding results for its customers.”
In March last year Catalyst was also given the green light by Australia’s competition watchdog to sell flexible packaging company Aperio Group for A$238m.
The sale to rival packaging business Amcor represents a six-times multiple of Aperio’s EBITDA of A$40m.
Catalyst formed the company in 2005 through its A$75.16m buyout of AEP Australasia with managing director Peter Sutton.
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