Former New York City Mayor Rudolph Giuliani has agreed to sell his boutique investment bank to Australian financial group Macquarie Group, the companies said on Monday, as the presidential hopeful ramps up his campaign.

The investment bank, Giuliani Capital Advisors, has about 105 employees in major cities including Chicago, New York, and Los Angeles. It is a unit of the former mayor's consulting firm Giuliani Partners, which employs about 50 people.