RadiumOne Said to Be Preparing IPO to Expand Overseas

RadiumOne Inc., an online-advertising network, is in the final stages of preparations for an initial public offering, people with knowledge of the matter said.

RadiumOne expects to generate more than $100 million in revenue this year, said the people, who asked not to be identified because the information isn’t public. Proceeds of the offering will be used for acquisitions, with a focus on international expansion, they said.