mBlox today said it has secured another $25 million in funding—money it plans to use in part for selective acquisitions in Europe and Asia to grow its mobile transactions business globally.

The round was led by Silicon Valley investment fund Trident Capital, which added its name to a growing number of financial backers including BA Venture Partners, Norwest Venture Partners, Novus Ventures and Avanti Capital. The infusion is definitely the company’s largest to date. Before today, mBlox had reported raising $25.8 million since 2003, $7.5 million of which came from a loan from Orix Venture Finance.

mBlox handles message delivery and mobile billing transactions for businesses, focusing on the transmission, clearing and settlement. In 2005, it processed 1 billion transactions primarily in the U.S. and Europe worth approximately $400 million, company officials said. With the new funding though, mBlox plans to build up its presence in Europe and expand into non-western countries through acquisition and investment in its existing infrastructure.