UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM N-Q QUARTERLY SCHEDULE OF PORTFOLIO HOLDINGS OF REGISTERED MANAGEMENT INVESTMENT COMPANY Investment Company Act file number 811-8707 Name of Fund: MuniHoldings Insured Fund, Inc. Fund Address: P.O. Box 9011 Princeton, NJ 08543-9011 Name and address of agent for service: Robert C. Doll, Jr., President, MuniHoldings Insured Fund, Inc., 800 Scudders Mill Road, Plainsboro, NJ, 08536. Mailing address: P.O. Box 9011, Princeton, NJ, 08543-9011 Registrant's telephone number, including area code: (609) 282-2800 Date of fiscal year end: 04/30/05 Date of reporting period: 11/01/04 - 1/31/05 Item 1 - Schedule of Investments MuniHoldings Insured Fund, Inc. Schedule of Investments as of January 31, 2005 (in Thousands) Face State Amount Municipal Bonds Value Arizona - 2.0% $ 3,590 Pinal County, Arizona, COP, 5.25% due 12/01/2023 $ 3,831 Arkansas - 1.0% 1,930 University of Arkansas, University Revenue Bonds (Fayetteville Campus), 5.50% due 12/01/2018 (c) 2,187 California - 28.0% 3,500 California Pollution Control Financing Authority, PCR, Refunding (Pacific Gas & Electric), AMT, Series A, 5.35% due 12/01/2016 (b) 3,802 California State Department of Water Resources, Power Supply Revenue Bonds, Series A: 4,000 5.375% due 5/01/2017 (d) 4,458 3,400 5.25% due 5/01/2020 3,697 3,000 5.375% due 5/01/2022 3,271 1,300 California State, Various Purpose, GO, 5.50% due 4/01/2028 1,419 Golden State Tobacco Securitization Corporation of California, Tobacco Settlement Revenue Bonds, Series B: 2,000 5.50% due 6/01/2018 2,097 5,000 5.75% due 6/01/2022 5,331 1,600 5.375% due 6/01/2028 (c) 1,696 5,305 Industry, California, Urban Development Agency, Tax Allocation Bonds (Civic-Recreational-Industrial Redevelopment Project No. 1), Series B, 5% due 5/01/2019 (b) 5,675 Los Angeles, California, Unified School District, GO: 2,000 (Election of 1997), Series F, 5% due 1/01/2028 (c) 2,101 5,780 Series A, 5% due 1/01/2028 (b) 6,071 2,565 Modesto, California, Schools Infrastructure Financing Agency, Special Tax Bonds, 5.50% due 9/01/2036 (a) 2,834 1,750 Sacramento County, California, Sanitation District Financing Authority, Revenue Refunding Bonds, RIB, Series 366, 9.612% due 12/01/2027 (j) 1,883 San Pablo, California, Joint Powers Financing Authority, Tax Allocation Revenue Refunding Bonds (b): 2,635 5.66%** due 12/01/2024 960 2,355 5.66%** due 12/01/2025 805 2,355 5.66%** due 12/01/2026 756 2,000 University of California Revenue Bonds (Multiple Purpose Projects), Series Q, 5% due 9/01/2022 (f) 2,124 3,480 West Contra Costa, California, Unified School District, GO, Series C, 5% due 8/01/2021 (c) 3,757 Colorado - 6.4% Aurora, Colorado, COP (a): 2,440 5.75% due 12/01/2015 2,767 2,560 5.75% due 12/01/2016 2,902 2,730 5.75% due 12/01/2017 3,088 2,890 5.75% due 12/01/2018 3,269 Portfolio Abbreviations To simplify the listings of MuniHoldings Insured Fund, Inc.'s portfolio holdings in the Schedule of Investments, we have abbreviated the names of many of the securities according to the list below. AMT Alternative Minimum Tax (subject to) COP Certificates of Participation EDA Economic Development Authority GO General Obligation Bonds HDA Housing Development Authority HFA Housing Finance Agency PCR Pollution Control Revenue Bonds RIB Residual Interest Bonds VRDN Variable Rate Demand Notes MuniHoldings Insured Fund, Inc. Schedule of Investments as of January 31, 2005 (concluded) (in Thousands) Face State Amount Municipal Bonds Value Connecticut - 7.2% $ 8,000 Connecticut State HFA Revenue Bonds (Housing Mortgage Finance Program), AMT, Series D-2, 5.15% due 11/15/2022 (b) $ 8,292 5,000 Connecticut State Health and Educational Facilities Authority Revenue Bonds (Connecticut State University System) Series E, 5% due 11/01/2033 (c) 5,218 Florida - 3.3% 3,500 Dade County, Florida, Water and Sewer System Revenue Bonds, 5.25% due 10/01/2021 (c) 3,739 2,500 Escambia County, Florida, Health Facilities Authority, Health Facility Revenue Bonds (Florida Health Care Facility Loan), 5.95% due 7/01/2020 (a) 2,538 Illinois - 15.2% Chicago, Illinois, GO (c): 5,000 5.50% due 1/01/2021 5,445 2,790 Series A, 6% due 1/01/2018 3,201 2,000 Series A, 6% due 1/01/2019 2,295 3,175 Series A, 6% due 1/01/2020 3,640 4,300 Chicago, Illinois, O'Hare International Airport Revenue Bonds, 3rd Lien, AMT, Series B-2, 6% due 1/01/2029 (d) 4,833 3,500 Chicago, Illinois, Parking District, GO, Series A, 5.75% due 1/01/2017 (c) 3,959 4,500 Illinois State, GO, First Series, 6% due 1/01/2018 (c) 5,082 45 Lake, Cook, Kane, and McHenry Counties, Illinois, Community United School District, GO, 5.75% due 12/01/2019 (c) 51 Louisiana - 1.7% 3,030 Louisiana Public Facilities Authority, Mortgage Revenue Refunding Bonds (Baton Rouge General Medical Center Project), 5.25% due 7/01/2033 (b)(h) 3,219 Massachusetts - 5.1% 65 Massachusetts State, GO, Refunding, Series D, 5.375% due 8/01/2012 (b)(g) 73 1,415 Massachusetts State, HFA, Housing Development Revenue Refunding Bonds, AMT, Series A, 5.15% due 6/01/2011 (b) 1,451 2,440 Massachusetts State, HFA, Rental Housing Mortgage Revenue Bonds, AMT, Series C, 5.50% due 7/01/2032 (f) 2,532 5,000 Massachusetts State Special Obligation Dedicated Tax Revenue Bonds, 5.25% due 1/01/2025 (c) 5,469 Michigan - 5.3% 2,035 Boyne City, Michigan, Public School District, GO, 5.75% due 5/01/2009 (c)(g) 2,270 1,000 Detroit, Michigan, Sewer Disposal Revenue Bonds, Senior Lien, VRDN, Series A, 1.84% due 7/01/2033 (e)(f) 1,000 Michigan State Strategic Fund, Limited Obligation Revenue Refunding Bonds, AMT (d): 1,200 (Detroit Edison Company Project), Series A, 5.50% due 6/01/2030 1,287 3,500 (Detroit Edison Company Project), Series C, 5.65% due 9/01/2029 3,743 1,500 (Detroit Edison Pollution), Series B, 5.65% due 9/01/2029 1,604 Minnesota - 2.4% 4,015 Sauk Rapids, Minnesota, Independent School District Number 47, GO, Series A, 5.65% due 2/01/2019 (b) 4,529 Mississippi - 0.7% 1,250 Mississippi Business Finance Corporation, Mississippi, PCR, Refunding (System Energy Resources Inc. Project), 5.875% due 4/01/2022 1,254 Missouri - 7.7% 2,000 Cape Girardeau, Missouri, School District Number 063, GO (Missouri Direct Deposit Program), 5.50% due 3/01/2018 (c) 2,212 Mehlville, Missouri, School District Number R-9, COP (f): 1,570 (Missouri Capital Improvement Projects), 5.50% due 9/01/2015 1,770 2,610 (Missouri Capital Improvement Projects), 5.50% due 9/01/2018 2,936 1,925 Series A, 5.50% due 3/01/2014 2,159 2,175 Series A, 5.50% due 3/01/2015 2,429 1,170 Series A, 5.50% due 3/01/2016 1,305 1,500 Series A, 5.50% due 3/01/2017 1,673 Nebraska - 2.1% Omaha Convention Hotel Corporation, Nebraska, Convention Center Revenue Bonds, First Tier, Series A (a): 1,585 5.50% due 4/01/2020 1,776 2,000 5.50% due 4/01/2021 2,241 Nevada - 2.4% 4,000 Las Vegas New Convention and Visitors Authority Revenue Bonds, 5.75% due 7/01/2018 (a) 4,492 New Jersey - 9.1% New Jersey EDA, Cigarette Tax Revenue Bonds: 5,295 5.75% due 6/15/2029 5,621 3,800 5.75% due 6/15/2034 4,206 6,700 New Jersey EDA, Motor Vehicle Surcharge Revenue Bonds, Series A, 5.25% due 7/01/2033 (b) 7,237 New York - 25.5% 10,000 Nassau Health Care Corporation, New York, Health System Revenue Bonds, 5.75% due 8/01/2009 (f)(g) 11,425 New York City, New York, GO, Refunding: 3,090 Series C, 5.875% due 8/01/2006 (b)(g) 3,296 3,160 Series C, 5.875% due 2/01/2016 (b) 3,373 7,500 Series G, 5.75% due 2/01/2006 (f)(g) 7,860 7,085 New York City, New York, GO, Series G, 5.75% due 10/15/2007 (f)(g) 7,761 3,380 New York City, New York, Sales Tax Asset Receivable Corporation Revenue Bonds, Series A, 5.25% due 10/15/2027 (a) 3,691 2,645 New York State Dormitory Authority Revenue Bonds (School Districts Financing Program), Series D, 5.25% due 10/01/2023 (b) 2,921 Tobacco Settlement Financing Corporation of New York Revenue Bonds, Series C-1: 4,900 5.50% due 6/01/2017 5,399 2,000 5.50% due 6/01/2021 2,211 Oregon - 0.9% 1,400 Portland, Oregon, Urban Renewal and Redevelopment Tax Allocation Bonds (Oregon Convention Center), Series A, 5.75% due 6/15/2015 (a) 1,589 Pennsylvania - 10.6% 3,900 Pennsylvania State Higher Educational Facilities Authority, State System of Higher Education Revenue Bonds, Series O, 5.125% due 6/15/2024 (a) 4,087 6,045 Philadelphia, Pennsylvania, Airport Revenue Bonds (Philadelphia Airport System), AMT, Series B, 5.50% due 6/15/2017 (c) 6,428 4,930 Philadelphia, Pennsylvania, School District, GO, Series A, 5.25% due 4/01/2015 (b) 5,347 1,800 Washington County, Pennsylvania, Capital Funding Authority Revenue Bonds (Capital Projects and Equipment Program), 6.15% due 12/01/2029 (a) 1,913 1,885 York County, Pennsylvania, School of Technology Authority, Lease Revenue Refunding Bonds, 5.50% due 2/15/2022 (c) 2,132 Rhode Island - 4.7% 5,000 Providence, Rhode Island, Redevelopment Agency Revenue Refunding Bonds (Public Safety and Municipal Buildings), Series A, 5.75% due 4/01/2019 (a) 5,640 2,870 Rhode Island State Health and Educational Building Corporation Revenue Bonds (Rhode Island School of Design), Series D, 5.50% due 8/15/2031 (d) 3,142 South Carolina - 0.9% 1,525 Medical University Hospital Authority, South Carolina, Mortgage Hospital Facilities, Revenue Refunding Bonds, Series A, 5.25% due 2/15/2025 (b)(h) 1,653 Tennessee - 3.2% Tennessee HDA, Revenue Refunding Bonds (Homeownership Program), AMT, Series A (f): 3,040 5.25% due 7/01/2022 3,188 2,795 5.35% due 1/01/2026 2,904 Texas - 7.6% 2,250 Austin, Texas, Convention Center Revenue Bonds (Convention Enterprises Inc.), Trust Certificates, Second Tier, Series B, 6% due 1/01/2023 2,408 8,000 Dallas-Fort Worth, Texas, International Airport Revenue Bonds, AMT, Series A, 5.50% due 11/01/2033 (b) 8,561 2,961 Houston, Texas, Community College System, Participation Interests, COP (Alief Center Project), 5.75% due 8/15/2022 (b) 3,264 Virginia - 2.4% 4,445 Virginia State, HDA, Commonwealth Mortgage Revenue Bonds, Series J, Sub-Series J-1, 5.20% due 7/01/2019 (b) 4,528 Washington - 4.7% 4,000 Bellevue, Washington, GO, Refunding, 5.50% due 12/01/2039 (b) 4,428 2,310 Chelan County, Washington, Public Utility District Number 001, Consolidated Revenue Bonds (Chelan Hydro System), AMT, Series A, 5.45% due 7/01/2037 (a) 2,436 1,810 Snohomish County, Washington, Public Utility District Number 001, Electric Revenue Bonds, 5.50% due 12/01/2022 (f) 2,047 West Virginia - 2.8% 5,000 West Virginia State Housing Development Fund, Housing Finance Revenue Refunding Bonds, Series D, 5.20% due 11/01/2021 (b) 5,269 Wisconsin - 0.3% 500 Wisconsin State Health and Educational Facilities Authority Revenue Bonds (Blood Center of Southeaster Wisconsin Project), 5.50% due 6/01/2024 522 Wyoming - 0.9% 1,500 Wyoming Student Loan Corporation, Student Loan Revenue Refunding Bonds, Series A, 6.20% due 6/01/2024 1,629 Puerto Rico - 1.0% 1,870 Puerto Rico Public Buildings Authority, Government Facilities Revenue Refunding Bonds, Series D, 5.25% due 7/01/2036 1,973 Total Municipal Bonds (Cost - $291,894) - 165.1% 310,587 Shares Held Short-Term Securities 1,421 Merrill Lynch Institutional Tax-Exempt Fund (i) 1,421 Total Short-Term Securities (Cost - $1,421) - 0.7% 1,421 Total Investments (Cost - $293,315*) - 165.8% 312,008 Other Assets Less Liabilities - 5.4% 10,151 Preferred Stock, at Redemption Value - (71.2%) (134,023) ------------ Net Assets Applicable to Common Stock - 100.0% $ 188,136 ============ *The cost and unrealized appreciation (depreciation) of investments as of January 31, 2005, computed for federal income tax purposes, were as follows: (in Thousands) Aggregate cost $ 293,315 ========== Gross unrealized appreciation $ 18,927 Gross unrealized depreciation (234) ---------- Net unrealized appreciation $ 18,693 ========== **Represents a zero coupon bond; the interest rate shown reflects the effective yield at the time of purchase by the Fund. (a)AMBAC Insured. (b)MBIA Insured. (c)FGIC Insured. (d)XL Capital Insured. (e)Security has a maturity of more than one year, but has variable rate and demand features, which qualify it as a short-term security. The rate disclosed is that currently in effect. This rate changes periodically based upon prevailing market rates. (f)FSA Insured. (g)Prerefunded. (h)FHA Insured. (i)Investments in companies considered to be an affiliate of the Fund (such companies are defined as "Affiliated Companies" in Section 2(a)(3) of the Investment Company Act of 1940) were as follows: (in Thousands) Net Dividend Affiliate Activity Income Merrill Lynch Institutional Tax-Exempt Fund 1,100 $ 42 (j)The rate disclosed is that currently in effect. This rate changes periodically and inversely based upon prevailing market rates. Forward interest rate swaps outstanding as of January 31, 2005 were as follows: (in Thousands) Notional Unrealized Amount Depreciation Receive a variable rate equal to 7-Day Bond Market Association Municipal Swap Index Rate and pay a fixed rate of 3.68% Broker, Morgan Stanley Capital Services, Inc. Expires March 2015 $ 15,000 $ (201) Item 2 - Controls and Procedures 2(a) - The registrant's certifying officers have reasonably designed such disclosure controls and procedures to ensure material information relating to the registrant is made known to us by others particularly during the period in which this report is being prepared. The registrant's certifying officers have determined that the registrant's disclosure controls and procedures are effective based on our evaluation of these controls and procedures as of a date within 90 days prior to the filing date of this report. 2(b) - There were no changes in the registrant's internal control over financial reporting (as defined in Rule 30a-3(d) under the Act (17 CFR 270.30a-3(d)) that occurred during the last fiscal quarter of the period covered by this report that has materially affected, or is reasonably likely to materially affect, the registrant's internal control over financial reporting. Item 3 - Exhibits Certifications - Attached hereto Pursuant to the requirements of the Securities Exchange Act of 1934 and the Investment Company Act of 1940, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized. MuniHoldings Insured Fund, Inc. By: /s/ Robert C. Doll, Jr. Robert C. Doll, Jr., President MuniHoldings Insured Fund, Inc. Date: March 21, 2005 Pursuant to the requirements of the Securities Exchange Act of 1934 and the Investment Company Act of 1940, this report has been signed below by the following persons on behalf of the registrant and in the capacities and on the dates indicated. By: /s/ Robert C. Doll, Jr. Robert C. Doll, Jr., President MuniHoldings Insured Fund, Inc. Date: March 21, 2005 By: /s/ Donald C. Burke Donald C. Burke, Chief Financial Officer MuniHoldings Insured Fund, Inc. Date: March 21, 2005