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 811-8215 Name of Fund: BlackRock MuniHoldings Fund II, Inc. Fund Address: P.O. Box 9011 Princeton, NJ 08543-9011 Name and address of agent for service: Robert C. Doll, Jr., Chief Executive Officer, BlackRock MuniHoldings Fund II, 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: 07/31/2007 Date of reporting period: 02/01/07 - 04/30/07 Item 1 - Schedule of Investments BlackRock MuniHoldings Fund II, Inc. Schedule of Investments as of April 30, 2007 (in Thousands) Face State Amount Municipal Bonds Value Alabama - 3.4% $ 1,145 Birmingham, Alabama, Special Care Facilities Financing Authority, Revenue Refunding Bonds (Ascension Health Credit), Series C-2, 5% due 11/15/2036 $ 1,187 835 Birmingham, Alabama, Special Care Facilities Financing Authority, Revenue Refunding Bonds (Ascension Health Credit), Series C-2, 5% due 11/15/2039 863 3,450 Jefferson County, Alabama, Limited Obligation School Warrants, Series A, 5% due 1/01/2024 3,603 Arizona - 4.5% 1,000 Arizona Health Facilities Authority Revenue Bonds (Catholic Healthcare West), Series A, 6.625% due 7/01/2010 (h) 1,093 1,365 Maricopa County, Arizona, IDA, Education Revenue Bonds (Arizona Charter Schools Project 1), Series A, 6.50% due 7/01/2012 1,394 2,060 Phoenix, Arizona, IDA, Airport Facility, Revenue Refunding Bonds (America West Airlines, Inc. Project), AMT, 6.30% due 4/01/2023 2,096 985 Pima County, Arizona, IDA, Education Revenue Bonds (Arizona Charter Schools Project), Series C, 6.75% due 7/01/2031 1,056 1,000 Pinal County, Arizona, COP, 5% due 12/01/2029 1,030 980 Show Low, Arizona, Improvement District Number 5, Special Assessment Bonds, 6.375% due 1/01/2015 1,000 Arkansas - 0.6% 1,000 University of Arkansas, University Construction Revenue Bonds (UAMS Campus), Series B, 5% due 11/01/2022 (d) 1,065 California - 20.3% 2,000 Benicia, California, Unified School District, GO, Refunding, Series A, 5.615% due 8/01/2020 (b)(m) 1,144 4,100 California Health Facilities Financing Authority Revenue Bonds (Sutter Health), Series A, 5.25% due 11/15/2046 4,329 5,200 California State Public Works Board, Lease Revenue Bonds (Department of Corrections), Series C, 5.25% due 6/01/2028 5,505 1,000 East Side Union High School District, California, Santa Clara County, GO (Election of 2002), Series D, 5% due 8/01/2020 (i) 1,070 870 Golden State Tobacco Securitization Corporation of California, Tobacco Settlement Revenue Bonds, Series A-3, 7.875% due 6/01/2013 (h) 1,060 670 Golden State Tobacco Securitization Corporation of California, Tobacco Settlement Revenue Refunding Bonds, Senior Series A-1, 5.125% due 6/01/2047 671 Portfolio Abbreviations To simplify the listings of BlackRock MuniHoldings Fund II, 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 DRIVERS Derivative Inverse Tax-Exempt Receipts EDA Economic Development Authority EDR Economic Development Revenue Bonds GO General Obligation Bonds HDA Housing Development Authority HFA Housing Finance Agency IDA Industrial Development Authority IDR Industrial Development Revenue Bonds S/F Single-Family PCR Pollution Control Revenue Bonds VRDN Variable Rate Demand Notes BlackRock MuniHoldings Fund II, Inc. Schedule of Investments as of April 30, 2007 (concluded) (in Thousands) Face State Amount Municipal Bonds Value California $ 2,260 Los Angeles, California, Unified School District, GO, Series A, 5% due (concluded) 7/01/2013 (d)(h) $ 2,427 1,750 Poway, California, Unified School District, Special Tax (Community Facilities District Number 6 Area), Series A, 6.125% due 9/01/2033 1,834 1,820 San Marino, California, Unified School District, GO, Series A, 5.50% due 7/01/2017 (d)(m) 1,202 1,945 San Marino, California, Unified School District, GO, Series A, 5.55% due 7/01/2018 (d)(m) 1,225 2,070 San Marino, California, Unified School District, GO, Series A, 5.60% due 7/01/2019 (d)(m) 1,245 5,525 Sequoia, California, Unified High School District, GO, Refunding, Series B, 5.50% due 7/01/2035 (c) 6,165 4,925 Tracy, California, Area Public Facilities Financing Agency, Special Tax Refunding Bonds (Community Facilities District Number 87-1), Series H, 5.875% due 10/01/2019 (d) 5,152 1,250 Tustin, California, Unified School District, Senior Lien Special Tax Bonds (Community Facilities District Number 97-1), Series A, 5% due 9/01/2032 (c) 1,296 Colorado - 1.6% 1,675 Elk Valley, Colorado, Public Improvement Revenue Bonds (Public Improvement Fee), Series A, 7.10% due 9/01/2014 1,788 860 Plaza Metropolitan District Number 1, Colorado, Tax Allocation Revenue Bonds (Public Improvement Fees), 8.125% due 12/01/2025 868 Florida - 7.8% 1,625 Ballantrae, Florida, Community Development District, Capital Improvement Revenue Bonds, 6% due 5/01/2035 1,743 2,100 Highlands County, Florida, Health Facilities Authority, Hospital Revenue Refunding Bonds (Adventist Health System), Series G, 5.125% due 11/15/2032 2,173 1,765 Miami-Dade County, Florida, Subordinate Special Obligation Revenue Bonds, Series A, 6% due 10/01/2037 (d)(m) 383 2,450 Midtown Miami, Florida, Community Development District, Special Assessment Revenue Bonds, Series A, 6.25% due 5/01/2037 2,664 2,400 Orange County, Florida, Health Facilities Authority, Hospital Revenue Bonds (Orlando Regional Healthcare), 6% due 12/01/2012 (h) 2,665 1,515 Orlando, Florida, Greater Orlando Aviation Authority, Airport Facilities Revenue Bonds (JetBlue Airways Corp.), AMT, 6.50% due 11/15/2036 1,616 525 Palm Coast Park Community Development District, Florida, Special Assessment Revenue Bonds, 5.70% due 5/01/2037 539 1,255 Preserve at Wilderness Lake, Florida, Community Development District, Capital Improvement Bonds, Series A, 5.90% due 5/01/2034 1,318 Georgia - 3.5% 1,250 Atlanta, Georgia, Tax Allocation Bonds (Atlantic Station Project), 7.90% due 12/01/2024 1,383 1,535 Brunswick and Glynn County, Georgia, Development Authority, First Mortgage Revenue Bonds (Coastal Community Retirement Corporation Project), Series A, 7.25% due 1/01/2035 1,236 1,945 Fulton County, Georgia, Development Authority, PCR (General Motors Corporation), Refunding, VRDN, 7.50% due 4/01/2010 (j) 1,945 1,250 Milledgeville-Baldwin County, Georgia, Development Authority Revenue Bonds (Georgia College and State University Foundation), 5.50% due 9/01/2024 1,342 Idaho - 1.3% 2,000 Power County, Idaho, Industrial Development Corporation, Solid Waste Disposal Revenue Bonds (FMC Corporation Project), AMT, 6.45% due 8/01/2032 2,120 Illinois - 2.8% 1,000 Chicago, Illinois, O'Hare International Airport, Special Facility Revenue Refunding Bonds (American Airlines Inc. Project), 8.20% due 12/01/2024 1,013 1,000 Chicago, Illinois, Special Assessment Bonds (Lake Shore East), 6.75% due 12/01/2032 1,083 2,000 Illinois HDA, Homeowner Mortgage Revenue Bonds, AMT, Sub-Series C-2, 5.25% due 8/01/2022 2,057 500 Illinois State Finance Authority Revenue Bonds (Landing at Plymouth Place Project), Series A, 6% due 5/15/2025 533 Louisiana - 2.3% 2,500 Louisiana Public Facilities Authority, Hospital Revenue Bonds (Franciscan Missionaries of Our Lady Health System, Inc.), Series A, 5.25% due 8/15/2036 2,613 1,275 New Orleans, Louisiana, Financing Authority Revenue Bonds (Xavier University of Louisiana Project), 5.30% due 6/01/2026 (d) 1,340 Maine - 2.1% 3,425 Maine State Housing Authority, Mortgage Purchase Revenue Refunding Bonds, Series B, 5.30% due 11/15/2023 3,566 Maryland - 0.6% 1,050 Maryland State Energy Financing Administration, Limited Obligation Revenue Bonds (Cogeneration-AES Warrior Run), AMT, 7.40% due 9/01/2019 1,046 Massachusetts - 4.5% 600 Massachusetts State Development Finance Agency Revenue Bonds (Neville Communities Home), Series A, 5.75% due 6/20/2022 (f) 671 1,500 Massachusetts State Development Finance Agency Revenue Bonds (Neville Communities Home), Series A, 6% due 6/20/2044 (f) 1,682 2,100 Massachusetts State, HFA, Housing Revenue Bonds, AMT, Series A, 5.25% due 12/01/2048 2,155 3,000 Massachusetts State School Building Authority, Dedicated Sales Tax Revenue Bonds, Series A, 5% due 8/15/2030 (c) 3,173 Michigan - 0.7% 1,100 Flint, Michigan, Hospital Building Authority, Revenue Refunding Bonds (Hurley Medical Center), Series A, 6% due 7/01/2020 (k) 1,198 Minnesota - 7.0% 1,680 Minneapolis, Minnesota, Community Development Agency, Supported Development Revenue Refunding Bonds (Common Bond), Series G-3, 5.35% due 12/01/2011 (h) 1,793 4,220 Minnesota State Municipal Power Agency, Electric Revenue Bonds, 5.25% due 10/01/2021 4,519 2,870 Rockford, Minnesota, Independent School District Number 883, GO, 5.60% due 2/01/2019 (c) 3,005 2,390 Rockford, Minnesota, Independent School District Number 883, GO, 5.60% due 2/01/2020 (c) 2,503 Mississippi - 1.5% 2,000 Mississippi Business Finance Corporation, Mississippi, PCR, Refunding (System Energy Resources, Inc. Project), 5.875% due 4/01/2022 2,021 500 Mississippi Business Finance Corporation, Mississippi, PCR, Refunding (System Energy Resources, Inc. Project), 5.90% due 5/01/2022 505 Missouri - 1.9% 950 Fenton, Missouri, Tax Increment Revenue Refunding and Improvement Bonds (Gravois Bluffs), 7% due 10/01/2011 (h) 1,083 1,000 Kansas City, Missouri, IDA, First Mortgage Health Facilities Revenue Bonds (Bishop Spencer Place), Series A, 6.50% due 1/01/2035 1,061 1,000 Missouri State Development Finance Board, Infrastructure Facilities Revenue Refunding Bonds (Branson), Series A, 5.50% due 12/01/2032 1,051 New Jersey - 11.4% 4,050 New Jersey EDA, Cigarette Tax Revenue Bonds, 5.75% due 6/15/2029 4,382 1,890 New Jersey EDA, Cigarette Tax Revenue Bonds, 5.50% due 6/15/2031 2,006 1,000 New Jersey EDA, Retirement Community Revenue Bonds (Cedar Crest Village, Inc. Facility), Series A, 7.25% due 11/15/2011 (h) 1,148 2,000 New Jersey EDA, Retirement Community Revenue Bonds (Seabrook Village, Inc.), Series A, 8.125% due 11/15/2010 (h) 2,295 2,000 New Jersey EDA, Special Facility Revenue Bonds (Continental Airlines, Inc. Project), AMT, 6.625% due 9/15/2012 2,129 2,375 New Jersey Health Care Facilities Financing Authority Revenue Bonds (South Jersey Hospital), 6% due 7/01/2012 (h) 2,614 2,500 New Jersey State Turnpike Authority, Turnpike Revenue Bonds, Series C, 5% due 1/01/2030 (c) 2,640 1,725 Tobacco Settlement Financing Corporation of New Jersey, Asset-Backed Revenue Bonds, 7% due 6/01/2013 (h) 2,026 New Mexico - 3.9% 3,675 Farmington, New Mexico, PCR, Refunding (Public Service Company of New Mexico - San Juan Project), Series A, 5.80% due 4/01/2022 3,711 2,675 New Mexico Finance Authority, Senior Lien State Transportation Revenue Bonds, Series A, 5.125% due 6/15/2018 (d) 2,879 New York - 11.4% 900 Dutchess County, New York, IDA, Civic Facility Revenue Refunding Bonds (Saint Francis Hospital), Series A, 7.50% due 3/01/2029 1,001 415 New York City, New York, City IDA, Civic Facility Revenue Bonds, Series C, 6.80% due 6/01/2028 456 525 New York City, New York, City IDA, Special Facility Revenue Bonds (Continental Airlines, Inc. Project), AMT, 8% due 11/01/2012 576 525 New York City, New York, City IDA, Special Facility Revenue Bonds (Continental Airlines, Inc. Project), AMT, 8.375% due 11/01/2016 582 3,855 New York City, New York, Sales Tax Asset Receivable Corporation Revenue Bonds, Series A, 5% due 10/15/2020 (d) 4,114 2,725 New York State Dormitory Authority Revenue Bonds (School Districts Financing Program), Series D, 5.25% due 10/01/2023 (d) 2,914 20 Suffolk County, New York, IDA, Civic Facility Revenue Bonds (Special Needs Facilities Pooled Program), Series D-1, 5.50% due 7/01/2007 20 1,100 Tobacco Settlement Financing Corporation of New York Revenue Bonds, Series A-1, 5.50% due 6/01/2015 1,152 2,400 Tobacco Settlement Financing Corporation of New York Revenue Bonds, Series A-1, 5.50% due 6/01/2018 2,577 2,750 Tobacco Settlement Financing Corporation of New York Revenue Bonds, Series C-1, 5.50% due 6/01/2020 (b) 2,988 1,100 Tobacco Settlement Financing Corporation of New York Revenue Bonds, Series C-1, 5.50% due 6/01/2022 1,188 1,575 Westchester County, New York, IDA, Continuing Care Retirement, Mortgage Revenue Bonds (Kendal on Hudson Project), Series A, 6.50% due 1/01/2034 1,690 North Carolina - 1.3% 2,000 North Carolina Eastern Municipal Power Agency, Power System Revenue Bonds, Series D, 6.75% due 1/01/2026 2,146 Oklahoma - 0.2% 405 Oklahoma State Housing Finance Agency, S/F Mortgage Revenue Bonds (Homeownership Loan Program), Series D-2, AMT, 6.25% due 9/01/2029 (f)(g) 411 Pennsylvania - 3.9% 2,750 Pennsylvania Economic Development Financing Authority, Exempt Facilities Revenue Bonds (National Gypsum Company), AMT, Series A, 6.25% due 11/01/2027 2,880 540 Philadelphia, Pennsylvania, Authority for IDR, Commercial Development, 7.75% due 12/01/2017 541 2,630 Sayre, Pennsylvania, Health Care Facilities Authority, Revenue Bonds (Guthrie Healthcare System), Series B, 7.125% due 12/01/2011 (h) 3,161 Rhode Island - 1.5% 2,190 Rhode Island State Health and Educational Building Corporation, Hospital Financing Revenue Bonds (Lifespan Obligation Group), 6.50% due 8/15/2012 (h) 2,474 South 2,080 Medical University Hospital Authority, South Carolina, Hospital Facilities Revenue Carolina - 2.8% Refunding Bonds, Series A, 6.375% due 8/15/2012 (h) 2,345 2,000 South Carolina Jobs, EDA, EDR (Westminster Presbyterian Center), 7.75% due 11/15/2010 (h) 2,296 South Dakota - 0.8% 1,350 South Dakota State Health and Educational Facilities Authority Revenue Bonds (Sanford Health), 5% due 11/01/2040 1,394 Tennessee - 5.2% 2,200 Hardeman County, Tennessee, Correctional Facilities Corporation Revenue Bonds, Series B, 7.375% due 8/01/2017 2,250 3,450 Shelby County, Tennessee, Health, Educational and Housing Facility Board, Hospital Revenue Refunding Bonds (Methodist Healthcare), 6.50% due 9/01/2012 (h) 3,914 2,500 Shelby County, Tennessee, Health, Educational and Housing Facility Board, Hospital Revenue Refunding Bonds (Saint Jude Children's Research Hospital), 5% due 7/01/2031 2,622 Texas - 7.3% 2,665 Austin, Texas, Convention Center Revenue Bonds (Convention Enterprises, Inc.), First Tier, Series A, 6.70% due 1/01/2011 (h) 2,931 2,500 Brazos River, Texas, Harbor Navigation District, Brazoria County Environmental Revenue Refunding Bonds (Dow Chemical Company Project), AMT, Series A-7, 6.625% due 5/15/2033 2,743 843 Harris County, Texas, Revenue Refunding Bonds, DRIVERS, Series 1111, 6.227% due 8/15/2009 (c)(e)(p) 911 1,300 Houston, Texas, Health Facilities Development Corporation, Retirement Facility Revenue Bonds (Buckingham Senior Living Community), Series A, 7.125% due 2/15/2034 1,451 2,965 Matagorda County, Texas, Navigation District Number 1, Revenue Refunding Bonds (Reliant Energy, Inc.), Series C, 8% due 5/01/2029 3,109 1,100 Port Corpus Christi, Texas, Individual Development Corporation, Environmental Facilities Revenue Bonds (Citgo Petroleum Corporation Project), AMT, 8.25% due 11/01/2031 1,125 Vermont - 0.6% 1,000 Vermont Educational and Health Buildings Financing Agency, Revenue Bonds (Developmental and Mental Health), Series A, 6.50% due 6/15/2032 1,062 Virginia - 13.3% 575 Chesterfield County, Virginia, IDA, PCR, Refunding (Virginia Electric and Power Company), Series B, 5.875% due 6/01/2017 619 425 Chesterfield County, Virginia, IDA, PCR (Virginia Electric and Power Company), Series A, 5.875% due 6/01/2017 455 5,000 Fairfax County, Virginia, EDA, Resource Recovery Revenue Refunding Bonds, AMT, Series A, 6.10% due 2/01/2011 (a) 5,384 3,885 Pocahontas Parkway Association, Virginia, Toll Road Revenue Bonds, Senior-Series A, 5.50% due 8/15/2008 (h) 4,051 18,400 Pocahontas Parkway Association, Virginia, Toll Road Revenue Bonds, Senior-Series B, 7.35% due 8/15/2008 (h)(m) 4,975 2,185 Tobacco Settlement Financing Corporation of Virginia, Asset-Backed Revenue Bonds, 5.625% due 6/01/2015 (h) 2,428 1,095 Virginia State HDA, Rental Housing Revenue Bonds, AMT, Series B, 5.625% due 8/01/2011 1,139 3,200 Virginia State, HDA, Revenue Bonds, AMT, Series D, 6% due 4/01/2024 3,325 Washington - 0.6% 1,015 Seattle, Washington, Housing Authority Revenue Bonds (Replacement Housing Project), 6.125% due 12/01/2032 1,044 Wisconsin - 0.9% 1,360 Wisconsin State Health and Educational Facilities Authority Revenue Bonds (SynergyHealth Inc.), 6% due 11/15/2032 1,478 Puerto Rico - 3.4% 1,945 Puerto Rico Commonwealth Highway and Transportation Authority, Transportation Revenue Refunding Bonds, Series N, 5.25% due 7/01/2036 2,254 1,800 Puerto Rico Electric Power Authority, Power Revenue Refunding Bonds, Series UU, 5% due 7/01/2021 (c) 1,949 1,550 Puerto Rico Industrial, Medical and Environmental Pollution Control Facilities Financing Authority, Special Facilities Revenue Bonds (American Airlines Inc.), Series A, 6.45% due 12/01/2025 1,582 U.S. Virgin 2,680 Virgin Islands Government Refinery Facilities, Revenue Refunding Bonds (Hovensa Islands - 1.8% Coker Project), AMT, 6.50% due 7/01/2021 3,016 Total Municipal Bonds (Cost - $214,771) - 136.7% 230,719 Municipal Bonds Held in Trust (o) California - 3.2% 5,130 California Pollution Control Financing Authority, PCR, Refunding (Pacific Gas and Electric), AMT, Series A, 5.35% due 12/01/2016 (d) 5,470 Maryland - 5.0% 7,765 Baltimore, Maryland, Convention Center Hotel Revenue Bonds, Senior Series A, 5.25% due 9/01/2039 (i) 8,395 Michigan - 3.1% 5,000 Michigan State Strategic Fund, Limited Obligation Revenue Refunding Bonds (Detroit Edison Company Pollution Control Project), AMT, Series C, 5.65% due 9/01/2029 (i) 5,302 New York - 2.1% 3,205 New York City, New York, Sales Tax Asset Receivable Corporation Revenue Bonds, Series A, 5.25% due 10/15/2027 (a) 3,469 South 8,400 South Carolina State Ports Authority, Ports Revenue Bonds, AMT, 5.30% due 7/01/2026 (c) 8,581 Carolina - 5.1% Texas - 4.3% 7,045 Harris County, Texas, Toll Road Revenue Refunding Bonds, Senior Lien, Series A, 5.25% due 8/15/2035 (c) 7,323 Total Municipal Bonds Held in Trust (Cost - $38,367) - 22.8% 38,540 Shares Held Short-Term Securities 12 Merrill Lynch Institutional Tax-Exempt Fund, 3.70% (l)(n) 12 Total Short-Term Securities (Cost - $12) - 0.0% 12 Total Investments (Cost - $253,150*) - 159.5% 269,271 Other Assets Less Liabilities - 3.0% 5,040 Liabilities for Trust Certificates, Including Interest Expense Payable - (10.9%) (18,429) Preferred Stock, at Redemption Value - (51.6%) (87,064) ----------- Net Assets Applicable to Common Stock - 100.0% $ 168,818 =========== * The cost and unrealized appreciation (depreciation) of investments as of April 30, 2007, as computed for federal income tax purposes, were as follows: Aggregate cost $ 235,001 ================= Gross unrealized appreciation $ 16,385 Gross unrealized depreciation (385) ----------------- Net unrealized appreciation $ 16,000 ================= (a) AMBAC Insured. (b) FGIC Insured. (c) FSA Insured. (d) MBIA Insured. (e) The rate disclosed is that currently in effect. This rate changes periodically and inversely based upon prevailing market rates. (f) GNMA Collateralized. (g) FNMA Collateralized. (h) Prerefunded. (i) XL Capital Insured. (j) Security may have a maturity of more than one year at time of issuance, but has variable rate and demand features that qualify it as a short-term security. The rate disclosed is that currently in effect. This rate changes periodically based upon prevailing market rates. (k) ACA Insured. (l) Investments in companies considered to be an affiliate of the Fund, for purposes of Section 2(a)(3) of the Investment Company Act of 1940, were as follows: Purchase Sale Realized Dividend Affiliate Cost Cost Gain Income Merrill Lynch Institutional Tax-Exempt Fund - - - -* * Amount is less than $1,000. (m) Represents a zero coupon bond; the interest rate shown reflects the effective yield at the time of purchase. (n) Represents the current yield as of April 30, 2007. (o) Securities represent underlying bonds transferred to a separate securitization trust established in a tender option bond transaction in which the Fund may have acquired the residual interest certificates. These securities serve as collateral in a financing transaction. (p) These securities are short-term floating rate certificates issued by tender option bond trusts and are secured by the underlying municipal bond securities. 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) - As of September 29, 2006, with the conclusion of the combination of Merrill Lynch's asset management business with BlackRock, the registrant was migrated to BlackRock's trading and compliance monitoring systems, and various personnel changes occurred. In conjunction with these business improvements, there were no changes in the registrant's internal control over financial reporting (as defined in Rule 30a-3(d) under Act (17 CFR 270.30a-3(d)) that occurred during the last fiscal quarter that has materially affected, or is reasonably likely to 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. BlackRock MuniHoldings Fund II, Inc. By: /s/ Robert C. Doll, Jr. ----------------------- Robert C. Doll, Jr. Chief Executive Officer BlackRock MuniHoldings Fund II, Inc. Date: June 20, 2007 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. Chief Executive Officer BlackRock MuniHoldings Fund II, Inc. Date: June 20, 2007 By: /s/ Donald C. Burke ------------------- Donald C. Burke Chief Financial Officer BlackRock MuniHoldings Fund II, Inc. Date: June 20, 2007