BlackRock MuniYield California Quality Fund, Inc. (the Fund), formerly BlackRock MuniYield California Insured Fund, Inc., is a non-diversified, closed-ended management investment company. The Fund's investment objective is to provide shareholders with as high a level of current income exempt from federal and California income taxes as is consistent with its investment policies and prudent investment management. The Fund seeks to achieve its investment objective by investing at least 80% of its assets in municipal obligations exempt from federal income taxes (except that the interest may be subject to the federal alternative minimum tax) and California income taxes. Under normal market conditions, the Fund invests primarily in long-term municipal obligations that are investment-grade quality at the time of investment. The Fund may invest directly in such securities or through the use of derivatives. BlackRock Advisors, LLC is the Fund's investment advisor.