PIMCO Corporate Opportunity Fund (the Fund) is a diversified, closed-end management investment company. Its investment objective is to seek total return through a combination of current income and capital appreciation in a diversified portfolio of United States dollar-denominated corporate debt obligations of varying maturities and other income producing securities. These include corporate bonds, debentures, notes and other similar types of corporate debt instruments. It focuses on corporate debt obligations rated in the lowest investment-grade category (Baa or BBB) and in the highest non-investment-grade category (Ba or BB). It invests in residual interest municipal bonds and residual interest tax exempt bonds (inverse floaters), whose interest rates bear an inverse relationship to the interest rate on another security or the value of an index. The Fund’s investment manager is Allianz Global Investors Fund Management LLC. Its sub-advisor is Pacific Investment Management Company LLC.