Liberty Properties's bid, understood to be in excess of £500,000, was accepted ahead of rivals Communications Direct. Former Wales and Lions centre Scott Gibbs, who captained the Ospreys in their inaugural 2003-04 season, is now the development manager of Liberty Properties.
"We're tremendously proud and excited to be investing in the new stadium in Swansea," Gibbs told BBC Wales Sport. "We saw the chance to sponsor such a flagship stadium as a once-in-a-lifetime opportunity for the company.
"We're a national company but our roots are firmly based in Swansea and so we're thrilled to be able to support and celebrate such an important landmark for the area."