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 811-05611 Name of Fund: BlackRock MuniVest Fund, Inc. (MVF) Fund Address: 100 Bellevue Parkway, Wilmington, DE 19809 Name and address of agent for service: Donald C. Burke, Chief Executive Officer, BlackRock MuniVest 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: (800) 882-0052, Option 4 Date of fiscal year end: 08/31/2008 Date of reporting period: 03/01/2008 - 05/31/2008 Item 1 - Schedule of Investments BlackRock MuniVest Fund, Inc. Schedule of Investments May 31, 2008 (Unaudited) (Percentages shown are based on Net Assets) Par State Municipal Bonds (000) Value ----------------------------------------------------------------------------------------------------------------------------------- Alabama - 2.9% Camden, Alabama, IDB, Exempt Facilities Revenue Bonds (Weyerhaeuser Company), Series A, 6.125%, 12/01/24 $ 2,550 $ 2,563,566 Huntsville, Alabama, Health Care Authority Revenue Bonds, Series A, 5.75%, 6/01/11 (a) 3,500 3,821,230 Prattville, Alabama, IDB, Environmental Improvement Revenue Bonds (International Paper Company Projects), AMT, Series A, 4.75%, 12/01/30 6,500 5,037,565 Selma, Alabama, IDB, Environmental Improvement Revenue Refunding Bonds (International Paper Company Project), Series B, 5.50%, 5/01/20 5,000 4,926,800 ------------- 16,349,161 ----------------------------------------------------------------------------------------------------------------------------------- Arizona - 1.8% Maricopa County, Arizona, IDA, Education Revenue Bonds (Arizona Charter Schools Project 1), Series A, 6.75%, 7/01/29 4,100 3,702,136 Pima County, Arizona, IDA, Education Revenue Bonds (Arizona Charter Schools Project), Series E, 7.25%, 7/01/31 2,055 2,124,952 Pima County, Arizona, IDA, Education Revenue Bonds (Arizona Charter Schools Project), Series I, 6.10%, 7/01/24 500 498,395 Pima County, Arizona, IDA, Education Revenue Bonds (Arizona Charter Schools Project), Series I, 6.30%, 7/01/31 1,000 991,520 Pima County, Arizona, IDA, Education Revenue Refunding Bonds (Arizona Charter Schools Project), Series O, 5%, 7/01/26 1,545 1,331,435 Pima County, Arizona, IDA, Education Revenue Refunding Bonds (Arizona Charter Schools Project II), Series A, 6.75%, 7/01/11 (a) 560 624,064 Pima County, Arizona, IDA, Education Revenue Refunding Bonds (Arizona Charter Schools Project II), Series A, 6.75%, 7/01/21 940 963,246 ------------- 10,235,748 ----------------------------------------------------------------------------------------------------------------------------------- California - 12.5% California State, GO, 5.50%, 4/01/14 (a) 550 619,949 California State, GO, 5.50%, 4/01/30 10 10,361 California State Public Works Board, Lease Revenue Bonds (Department of Corrections), Series C, 5.50%, 6/01/22 5,000 5,291,250 California State Public Works Board, Lease Revenue Bonds (Department of Corrections), Series C, 5.50%, 6/01/23 6,000 6,328,440 California State Public Works Board, Lease Revenue Bonds (Department of Mental Health - Coalinga State Hospital), Series A, 5.125%, 6/01/29 11,075 11,163,157 Portfolio Abbreviations To simplify the listings of BlackRock MuniVest 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) ARS Auction Rate Securities DRIVERS Derivative Inverse Tax-Exempt Receipts EDA Economic Development Authority GO General Obligation Bonds HFA Housing Finance Agency IDA Industrial Development Authority IDB Industrial Development Board IDR Industrial Development Revenue Bonds PCR Pollution Control Revenue Bonds RIB Residual Interest Bonds S/F Single-Family VRDN Variable Rate Demand Notes BlackRock MuniVest Fund, Inc. Schedule of Investments May 31, 2008 (Unaudited) (Percentages shown are based on Net Assets) Par State Municipal Bonds (000) Value ----------------------------------------------------------------------------------------------------------------------------------- California State, Various Purpose, GO, 5.50%, 11/01/33 $ 11,250 $ 11,605,163 California Statewide Communities Development Authority, Health Facility Revenue Bonds (Memorial Health Services), Series A, 6%, 10/01/23 5,240 5,505,825 California Statewide Communities Development Authority Revenue Bonds (Saint Joseph Home Care), Series E, 5.25%, 7/01/47 (b) 1,500 1,533,285 Chula Vista, California, IDR (San Diego Gas and Electric Company), AMT, Series B, 5%, 12/01/27 1,250 1,215,112 Golden State Tobacco Securitization Corporation of California, Tobacco Settlement Revenue Bonds, Series A-3, 7.875%, 6/01/13 (a) 10,725 12,830,317 Golden State Tobacco Securitization Corporation of California, Tobacco Settlement Revenue Bonds, Series A-4, 7.80%, 6/01/13 (a) 3,750 4,473,900 Golden State Tobacco Securitization Corporation of California, Tobacco Settlement Revenue Bonds, Series A-5, 7.875%, 6/01/13 (a) 1,425 1,704,727 Golden State Tobacco Securitization Corporation of California, Tobacco Settlement Revenue Bonds, Series B, 5.375%, 6/01/10 (a) 8,000 8,408,560 ------------- 70,690,046 ----------------------------------------------------------------------------------------------------------------------------------- Colorado - 0.6% Colorado HFA, Revenue Refunding Bonds (S/F Program), AMT, Senior Series A-2, 6.60%, 5/01/28 495 512,840 Colorado HFA, Revenue Refunding Bonds (S/F Program), AMT, Senior Series A-2, 7.50%, 4/01/31 170 176,446 Colorado Health Facilities Authority Revenue Bonds (Lutheran Medical Center), Series A, 5.25%, 6/01/34 3,000 2,861,040 ------------- 3,550,326 ----------------------------------------------------------------------------------------------------------------------------------- Connecticut - 0.5% Mohegan Tribe Indians Gaming Authority, Connecticut, Public Improvement Revenue Refunding Bonds (Priority Distribution), 6.25%, 1/01/31 2,810 2,673,041 ----------------------------------------------------------------------------------------------------------------------------------- Florida - 5.9% Highlands County, Florida, Health Facilities Authority, Hospital Revenue Bonds (Adventist Health System), Series C, 5.25%, 11/15/36 15,800 15,524,606 Hillsborough County, Florida, IDA, Hospital Revenue Bonds (H. Lee Moffitt Cancer Center Project), Series A, 5.25%, 7/01/37 6,500 6,274,320 Orange County, Florida, Health Facilities Authority, Hospital Revenue Bonds (Adventist Health System), 5.625%, 11/15/12 (a) 10,320 11,466,552 ------------- 33,265,478 ----------------------------------------------------------------------------------------------------------------------------------- Georgia - 5.3% Gainesville, Georgia, Redevelopment Authority, Educational Facilities Revenue Refunding Bonds (Riverside Military Academy), 5.125%, 3/01/37 1,100 926,662 Georgia Municipal Electric Authority, Power Revenue Refunding Bonds, Series W, 6.60%, 1/01/18 4,595 5,312,234 Georgia Municipal Electric Authority, Power Revenue Refunding Bonds, Series W, 6.60%, 1/01/18 (f) 250 286,722 Georgia Municipal Electric Authority, Power Revenue Refunding Bonds, Series Y, 10%, 1/01/10 (f) 250 279,470 Houston County, Georgia, Hospital Authority Revenue Bonds (Houston Heart Institute Project), 5.25%, 10/01/35 5,000 4,956,600 BlackRock MuniVest Fund, Inc. Schedule of Investments May 31, 2008 (Unaudited) (Percentages shown are based on Net Assets) Par State Municipal Bonds (000) Value ----------------------------------------------------------------------------------------------------------------------------------- Main Street Natural Gas, Inc., Georgia, Gas Project Revenue Bonds, Series A, 6.25%, 7/15/33 $ 1,165 $ 1,178,211 Main Street Natural Gas, Inc., Georgia, Gas Project Revenue Bonds, Series A, 6.375%, 7/15/38 3,270 3,342,823 Milledgeville-Baldwin County, Georgia, Development Authority Revenue Bonds (Georgia College and State University Foundation), 5.50%, 9/01/14 (a) 4,390 4,952,842 Milledgeville-Baldwin County, Georgia, Development Authority Revenue Bonds (Georgia College and State University Foundation), 5.625%, 9/01/14 (a) 3,000 3,412,890 Monroe County, Georgia, Development Authority, PCR, Refunding (Oglethorpe Power Corporation-Scherer), Series A, 6.80%, 1/01/11 4,785 5,184,069 ------------- 29,832,523 ----------------------------------------------------------------------------------------------------------------------------------- Idaho - 0.5% Idaho Housing Agency, S/F Mortgage Revenue Refunding Bonds, AMT, Series E-2, 6.90%, 1/01/27 295 304,980 Idaho Housing and Financing Association, S/F Mortgage Revenue Bonds, AMT, Series J-1, Class III, 5%, 1/01/28 2,380 2,292,107 ------------- 2,597,087 ----------------------------------------------------------------------------------------------------------------------------------- Illinois - 9.0% Chicago, Illinois, O'Hare International Airport, General Airport Revenue Refunding Bonds, Third Lien, AMT, Series A, 5.75%, 1/01/19 (g) 5,000 5,159,550 Chicago, Illinois, O'Hare International Airport Revenue Bonds, Third Lien, AMT, Series B-2, 6%, 1/01/29 (e) 11,200 11,585,168 Chicago, Illinois, S/F Mortgage Revenue Bonds, AMT, Series C, 7%, 3/01/32 (h)(i) 60 61,970 Hodgkins, Illinois, Environmental Improvement Revenue Bonds (Metro Biosolids Management LLC Project), AMT, 6%, 11/01/23 10,000 10,049,200 Illinois Development Finance Authority Revenue Bonds (Community Rehabilitation Providers Facilities), Series A, 6.50%, 7/01/22 2,140 2,252,008 Illinois Development Finance Authority, Revenue Refunding Bonds (Community Rehabilitation Providers Facilities), Series A, 6%, 7/01/15 465 468,832 Illinois State Finance Authority, Revenue Bonds (Community Rehabilitation Providers Facilities), 4.625%, 7/01/27 2,695 2,369,040 Illinois State Finance Authority, Revenue Refunding Bonds (Central DuPage Health System), VRDN, Series B, 1.20%, 11/01/38 (c) 6,500 6,500,000 Kane and De Kalb Counties, Illinois, Community Unit School District Number 302, GO, DRIVERS, Series 283, 9.63%, 2/01/18 (c)(k) 13 15,762 McLean and Woodford Counties, Illinois, Community Unit School District Number 005, GO, Refunding, 6.25%, 12/01/14 (b) 1,005 1,111,570 McLean and Woodford Counties, Illinois, Community Unit School District Number 005, GO, Refunding, 6.375%, 12/01/16 (b) 845 938,381 Regional Transportation Authority, Illinois, Revenue Bonds, Series A, 7.20%, 11/01/20 (j) 3,500 4,230,835 Regional Transportation Authority, Illinois, Revenue Bonds, Series C, 7.75%, 6/01/20 (k) 4,000 5,148,880 BlackRock MuniVest Fund, Inc. Schedule of Investments May 31, 2008 (Unaudited) (Percentages shown are based on Net Assets) Par State Municipal Bonds (000) Value ----------------------------------------------------------------------------------------------------------------------------------- Will County, Illinois, School District Number 122 (New Lenox Elementary), GO, Series A, 6.50%, 11/01/10 (a)(b) $ 395 $ 428,291 Will County, Illinois, School District Number 122 (New Lenox Elementary), GO, Series A, 6.50%, 11/01/13 (b) 505 547,561 ------------- 50,867,048 ----------------------------------------------------------------------------------------------------------------------------------- Indiana - 6.3% Indiana Health and Educational Facilities Financing Authority, Hospital Revenue Bonds (Clarian Health Obligation), Series A, 5.25%, 2/15/40 8,980 8,775,885 Indiana Transportation Finance Authority, Highway Revenue Bonds, Series A, 6.80%, 12/01/16 8,195 9,408,843 Indianapolis, Indiana, Local Public Improvement Bond Bank, Revenue Refunding Bonds, Series D, 6.75%, 2/01/14 15,335 17,160,632 ------------- 35,345,360 ----------------------------------------------------------------------------------------------------------------------------------- Iowa - 1.1% Iowa Financing Authority, S/F Mortgage Revenue Refunding Bonds, AMT, Series E, 5.15%, 7/01/32 (i) 6,510 6,283,322 ----------------------------------------------------------------------------------------------------------------------------------- Kansas - 0.7% Sedgwick and Shawnee Counties, Kansas, S/F Mortgage Revenue Bonds (Mortgage-Backed Securities Program), AMT, Series A-4, 5.95%, 12/01/33 (i) 3,805 3,850,318 ----------------------------------------------------------------------------------------------------------------------------------- Kentucky - 1.9% Louisville and Jefferson County, Kentucky, Metropolitan Government Health System, Revenue Refunding Bonds (Norton Healthcare, Inc.), 5.25%, 10/01/36 (l) 10,815 10,610,921 ----------------------------------------------------------------------------------------------------------------------------------- Louisiana - 4.6% Louisiana HFA, S/F Mortgage Revenue Bonds (Home Ownership Program), AMT, Series C-2, 5.20%, 6/01/39 (h)(i) 6,000 5,733,600 Louisiana Public Facilities Authority, Hospital Revenue Bonds (Franciscan Missionaries of Our Lady Health System, Inc.), Series A, 5%, 8/15/33 8,720 8,440,175 Louisiana Public Facilities Authority, Hospital Revenue Bonds (Franciscan Missionaries of Our Lady Health System, Inc.), Series A, 5.25%, 8/15/36 11,660 11,642,044 ------------- 25,815,819 ----------------------------------------------------------------------------------------------------------------------------------- Maine - 0.3% Portland, Maine, Housing Development Corporation, Senior Living Revenue Bonds (Avesta Housing Development Corporation Project), Series A, 5.70%, 8/01/21 775 772,094 Portland, Maine, Housing Development Corporation, Senior Living Revenue Bonds (Avesta Housing Development Corporation Project), Series A, 6%, 2/01/34 1,190 1,169,996 ------------- 1,942,090 ----------------------------------------------------------------------------------------------------------------------------------- Maryland - 0.5% Maryland State Community Development Administration, Department of Housing and Community Development, Residential Revenue Refunding Bonds, AMT, Series D, 4.90%, 9/01/42 3,250 2,927,470 ----------------------------------------------------------------------------------------------------------------------------------- Massachusetts - 12.5% Boston, Massachusetts, Water and Sewer Commission Revenue Bonds, 9.25%, 1/01/11 (f) 2,035 2,306,510 Massachusetts Bay Transportation Authority, Revenue Refunding Bonds (General Transportation System), Series A, 7%, 3/01/19 3,010 3,677,799 BlackRock MuniVest Fund, Inc. Schedule of Investments May 31, 2008 (Unaudited) (Percentages shown are based on Net Assets) Par State Municipal Bonds (000) Value ----------------------------------------------------------------------------------------------------------------------------------- Massachusetts State Development Finance Agency, Revenue Refunding Bonds (Boston University Project), VRDN, Series U-6A, 1.40%, 10/01/42 (c) $ 17,600 $ 17,600,000 Massachusetts State, HFA, Housing Revenue Bonds, AMT, Series A, 5.20%, 12/01/37 3,000 2,903,370 Massachusetts State, HFA, Housing Revenue Refunding Bonds, AMT, Series D, 4.85%, 6/01/40 3,000 2,603,820 Massachusetts State, HFA, S/F Housing Revenue Bonds, AMT, Series 130, 5%, 12/01/32 2,500 2,362,400 Massachusetts State Water Resource Authority Revenue Bonds, Series A, 6.50%, 7/15/19 (f) 30,000 35,560,500 Massachusetts State Water Resource Authority, Revenue Refunding Bonds, Series A, 6%, 8/01/10 (a)(k) 3,480 3,771,554 ------------- 70,785,953 ----------------------------------------------------------------------------------------------------------------------------------- Michigan - 4.5% Delta County, Michigan, Economic Development Corporation, Environmental Improvement Revenue Refunding Bonds (Mead Westvaco-Escanaba), Series A, 6.25%, 4/15/12 (a) 2,500 2,789,900 Macomb County, Michigan, Hospital Finance Authority, Hospital Revenue Bonds (Mount Clemens General Hospital), Series B, 5.75%, 11/15/25 3,715 3,519,182 Macomb County, Michigan, Hospital Finance Authority, Hospital Revenue Bonds (Mount Clemens General Hospital), Series B, 5.875%, 11/15/34 4,250 3,989,135 Michigan State Hospital Finance Authority, Hospital Revenue Refunding Bonds (Crittenton Hospital), Series A, 5.625%, 3/01/27 1,900 1,939,862 Michigan State Hospital Finance Authority, Hospital Revenue Refunding Bonds (Oakwood Obligated Group), Series A, 5%, 7/15/25 2,000 2,001,340 Michigan State Hospital Finance Authority, Revenue Refunding Bonds (Henry Ford Health System), Series A, 5.25%, 11/15/46 10,450 10,144,128 Michigan State Hospital Finance Authority, Revenue Refunding Bonds (Sinai Hospital), 6.70%, 1/01/26 1,000 999,940 ------------- 25,383,487 ----------------------------------------------------------------------------------------------------------------------------------- Minnesota - 1.7% Minneapolis, Minnesota, Health Care System Revenue Bonds (Allina Health System), Series A, 5.75%, 11/15/12 (a) 7,235 8,013,197 Saint Cloud, Minnesota, Health Care Revenue Refunding Bonds (Saint Cloud Hospital Obligation Group), Series A, 6.25%, 5/01/17 (b) 1,405 1,504,333 ------------- 9,517,530 ----------------------------------------------------------------------------------------------------------------------------------- Mississippi - 6.6% Lowndes County, Mississippi, Solid Waste Disposal and PCR, Refunding (Weyerhaeuser Company Project), Series A, 6.80%, 4/01/22 9,160 9,787,826 Lowndes County, Mississippi, Solid Waste Disposal and PCR, Refunding (Weyerhaeuser Company Project), Series B, 6.70%, 4/01/22 4,500 4,766,715 Mississippi Business Finance Corporation, Mississippi, PCR, Refunding (System Energy Resources Inc. Project), 5.875%, 4/01/22 20,705 20,556,131 BlackRock MuniVest Fund, Inc. Schedule of Investments May 31, 2008 (Unaudited) (Percentages shown are based on Net Assets) Par State Municipal Bonds (000) Value ----------------------------------------------------------------------------------------------------------------------------------- Mississippi Business Finance Corporation, Mississippi, PCR, Refunding (System Energy Resources Inc. Project), 5.90%, 5/01/22 $ 2,250 $ 2,228,828 ------------- 37,339,500 ----------------------------------------------------------------------------------------------------------------------------------- Missouri - 2.7% Missouri State Development Finance Board, Infrastructure Facilities Revenue Refunding Bonds (Branson), Series A, 5.50%, 12/01/32 2,600 2,518,464 Missouri State Health and Educational Facilities Authority, Health Facilities Revenue Refunding Bonds (SSM Health Care Corporation), ARS, VRDN, Series D-2, 1.75%, 6/01/33 (b)(c) 12,300 12,300,000 Missouri State Housing Development Commission, S/F Mortgage Revenue Bonds (Homeowner Loan), AMT, Series A, 7.50%, 3/01/31 (i) 185 194,735 ------------- 15,013,199 ----------------------------------------------------------------------------------------------------------------------------------- Montana - 1.1% Forsyth, Montana, PCR, Refunding (Portland General Electric Company), Series A, 5.20%, 5/01/33 6,000 6,067,560 ----------------------------------------------------------------------------------------------------------------------------------- Nebraska - 0.0% Nebraska Investment Finance Authority, S/F Housing Revenue Bonds, AMT, Series C, 6.30%, 9/01/28 (h)(i) 10 10,129 ----------------------------------------------------------------------------------------------------------------------------------- New Hampshire - 0.5% New Hampshire Health and Education Facilities Authority, Revenue Refunding Bonds (Elliot Hospital), Series B, 5.60%, 10/01/22 2,675 2,751,425 ----------------------------------------------------------------------------------------------------------------------------------- New Jersey - 4.8% New Jersey EDA, Cigarette Tax Revenue Bonds, 5.50%, 6/15/24 9,080 8,834,658 New Jersey EDA, Cigarette Tax Revenue Bonds, 5.75%, 6/15/29 2,885 2,829,723 New Jersey EDA, Cigarette Tax Revenue Bonds, 5.75%, 6/15/34 8,695 8,454,757 Tobacco Settlement Financing Corporation of New Jersey, Asset-Backed Revenue Bonds, 7%, 6/01/13 (a) 5,980 7,007,125 ------------- 27,126,263 ----------------------------------------------------------------------------------------------------------------------------------- New York - 0.5% New York City, New York, City Transitional Finance Authority Revenue Bonds, RIB, Series 283, 10.62%, 11/15/15 (c) 1,125 1,321,673 New York City, New York, GO, Refunding, Series A, 6.375%, 5/15/14 (k) 965 1,033,457 New York State Local Government Assistance Corporation, Revenue Refunding Bonds, Sub-Lien, VRDN, Series 4V, 1.50%, 4/01/22 (b)(c) 400 400,000 ------------- 2,755,130 ----------------------------------------------------------------------------------------------------------------------------------- North Carolina - 0.6% Gaston County, North Carolina, Industrial Facilities and Pollution Control Financing Authority, Revenue Bonds (National Gypsum Company Project), AMT, 5.75%, 8/01/35 4,105 3,260,848 ----------------------------------------------------------------------------------------------------------------------------------- Ohio - 4.5% Buckeye Tobacco Settlement Financing Authority, Ohio, Tobacco Settlement Asset-Backed Bonds, Series A-2, 6.50%, 6/01/47 27,500 25,669,875 ----------------------------------------------------------------------------------------------------------------------------------- Pennsylvania - 4.4% Pennsylvania State Higher Education Assistance Agency Revenue Bonds, Capital Acquisition, 6.125%, 12/15/10 (a)(g) 2,440 2,658,624 Pennsylvania State Higher Educational Facilities Authority Revenue Bonds (University of Pennsylvania Medical Center Health System), Series A, 6%, 1/15/31 6,250 6,617,750 Philadelphia, Pennsylvania, Authority for Industrial Development, Senior Living Revenue Bonds (Arbor House Inc. Project), Series E, 6.10%, 7/01/33 1,000 997,130 Philadelphia, Pennsylvania, Authority for Industrial Development, Senior Living Revenue Bonds (Rieder House Project), Series A, 6.10%, 7/01/33 1,355 1,351,111 BlackRock MuniVest Fund, Inc. Schedule of Investments May 31, 2008 (Unaudited) (Percentages shown are based on Net Assets) Par State Municipal Bonds (000) Value ----------------------------------------------------------------------------------------------------------------------------------- Sayre, Pennsylvania, Health Care Facilities Authority, Revenue Bonds (Guthrie Healthcare System), Series B, 7.125%, 12/01/11 (a) $ 9,280 $ 11,174,790 Sayre, Pennsylvania, Health Care Facilities Authority, Revenue Refunding Bonds (Guthrie Healthcare System), Series A, 6.25%, 12/01/11 (a) 1,340 1,497,571 Sayre, Pennsylvania, Health Care Facilities Authority, Revenue Refunding Bonds (Guthrie Healthcare System), Series A, 6.25%, 12/01/18 410 434,333 ------------- 24,731,309 ----------------------------------------------------------------------------------------------------------------------------------- South Carolina - 1.0% Georgetown County, South Carolina, Environmental Improvement Revenue Refunding Bonds (International Paper Company Project), AMT, Series A, 5.55%, 12/01/29 1,000 883,000 Richland County, South Carolina, Environmental Improvement Revenue Refunding Bonds (International Paper), AMT, 6.10%, 4/01/23 5,000 4,987,900 ------------- 5,870,900 ----------------------------------------------------------------------------------------------------------------------------------- South Dakota - 0.4% South Dakota State Health and Educational Facilities Authority Revenue Bonds (Sanford Health), 5%, 11/01/40 2,605 2,478,684 ----------------------------------------------------------------------------------------------------------------------------------- Tennessee - 0.8% Shelby County, Tennessee, Health, Educational and Housing Facility Board, Hospital Revenue Refunding Bonds (Methodist Healthcare), 6.50%, 9/01/12 (a) 4,120 4,693,792 ----------------------------------------------------------------------------------------------------------------------------------- Texas - 15.8% Austin, Texas, Convention Center Revenue Bonds (Convention Enterprises Inc.), First Tier, Series A, 6.70%, 1/01/11 (a) 6,290 6,892,708 Brazos River Authority, Texas, PCR, Refunding (TXU Energy Company LLC Project), AMT, Series A, 7.70%, 4/01/33 3,055 3,033,126 Brazos River, Texas, Harbor Navigation District, Brazoria County Environmental Revenue Refunding Bonds (Dow Chemical Company Project), AMT, Series A-7, 6.625%, 5/15/33 11,460 11,827,178 Dallas-Fort Worth, Texas, International Airport, Joint Revenue Bonds, AMT, Series B, 6.25%, 11/01/28 (g) 4,500 4,529,205 Dallas-Fort Worth, Texas, International Airport, Joint Revenue Bonds, AMT, Series C, 6.25%, 11/01/28 (g) 1,500 1,521,555 Dallas-Fort Worth, Texas, International Airport, Joint Revenue Refunding Bonds, AMT, Sub-Series A-2, 6.10%, 11/01/24 (g) 1,000 1,013,870 Gregg County, Texas, Health Facilities Development Corporation, Hospital Revenue Bonds (Good Shepherd Medical Center Project), 6.875%, 10/01/10 (a)(m) 3,000 3,328,920 Guadalupe-Blanco River Authority, Texas, Sewage and Solid Waste Disposal Facility Revenue Bonds (E. I. du Pont de Nemours and Company Project), AMT, 6.40%, 4/01/26 10,250 10,266,912 Gulf Coast Waste Disposal Authority, Texas, Revenue Refunding Bonds (International Paper Company), AMT, Series A, 6.10%, 8/01/24 6,000 5,884,680 Harris County-Houston Sports Authority, Texas, Revenue Refunding Bonds, Senior Lien, Series G, 5.75%, 11/15/20 (g) 5,500 5,725,995 Houston, Texas, Industrial Development Corporation Revenue Bonds (Air Cargo), AMT, 6.375%, 1/01/23 1,790 1,792,685 Mansfield, Texas, Independent School District, GO, Refunding, 6.625%, 2/15/15 155 165,004 BlackRock MuniVest Fund, Inc. Schedule of Investments May 31, 2008 (Unaudited) (Percentages shown are based on Net Assets) Par State Municipal Bonds (000) Value ----------------------------------------------------------------------------------------------------------------------------------- Matagorda County, Texas, Navigation District Number 1, Revenue Refunding Bonds (Centerpoint Energy Project), 5.60%, 3/01/27 $ 9,355 $ 8,762,361 Midway, Texas, Independent School District, GO, Refunding, 6.125%, 8/15/14 5,225 5,591,011 Port Corpus Christi, Texas, Revenue Refunding Bonds (Celanese Project), Series A, 6.45%, 11/01/30 2,700 2,541,132 Red River Authority, Texas, PCR, Refunding (Celanese Project), AMT, Series B, 6.70%, 11/01/30 5,000 4,814,750 San Antonio, Texas, Electric and Gas Revenue Bonds, Series A, 5.75%, 2/01/10 (a) 11,000 11,625,680 ------------- 89,316,772 ----------------------------------------------------------------------------------------------------------------------------------- Vermont - 0.2% Vermont Educational and Health Buildings Financing Agency, Developmental and Mental Health Revenue Bonds (Howard Center for Human Services), Series A, 6.375%, 6/15/22 1,000 1,037,490 ----------------------------------------------------------------------------------------------------------------------------------- Virginia - 1.1% Chesterfield County, Virginia, IDA, PCR (Virginia Electric and Power Company), Series A, 5.875%, 6/01/17 1,425 1,508,904 Fairfax County, Virginia, EDA, Residential Care Facilities, Mortgage Revenue Refunding Bonds (Goodwin House, Inc.), 5.125%, 10/01/37 2,000 1,807,980 Fairfax County, Virginia, EDA, Residential Care Facilities, Mortgage Revenue Refunding Bonds (Goodwin House, Inc.), 5.125%, 10/01/42 3,335 2,969,517 ------------- 6,286,401 ----------------------------------------------------------------------------------------------------------------------------------- Washington - 5.9% Energy Northwest, Washington, Electric Revenue Refunding Bonds (Columbia Generating), Series B, 6%, 7/01/18 (j) 7,015 7,618,641 Seattle, Washington, Housing Authority Revenue Bonds (Replacement Housing Project), 6.125%, 12/01/32 2,355 2,356,366 Washington State, GO, Series B, 6%, 1/01/10 (a)(b) 5,000 5,290,450 Washington State Public Power Supply System, Revenue Refunding Bonds (Nuclear Project Number 1), Series B, 7.125%, 7/01/16 14,320 17,742,623 ------------- 33,008,080 ----------------------------------------------------------------------------------------------------------------------------------- Wisconsin - 1.8% Milwaukee, Wisconsin, Revenue Bonds (Air Cargo), AMT, 6.50%, 1/01/25 1,755 1,766,250 Wisconsin State Health and Educational Facilities Authority, Mortgage Revenue Bonds (Hudson Memorial Hospital), 5.70%, 1/15/29 (n) 5,000 5,145,950 Wisconsin State Health and Educational Facilities Authority Revenue Bonds (SynergyHealth Inc.), 6%, 11/15/32 3,040 3,012,974 ------------- 9,925,174 ----------------------------------------------------------------------------------------------------------------------------------- U.S. Virgin Virgin Islands Government Refinery Facilities, Revenue Refunding Bonds (Hovensa Islands - 1.5% Coker Project), AMT, 6.50%, 7/01/21 8,000 8,209,200 ----------------------------------------------------------------------------------------------------------------------------------- Total Municipal Bonds (Cost - $698,124,722) - 127.3% 718,074,459 ----------------------------------------------------------------------------------------------------------------------------------- Municipal Bonds Transferred to Tender Option Bond Trusts (o) ----------------------------------------------------------------------------------------------------------------------------------- Connecticut - 2.2% Connecticut State Health and Educational Facilities Authority Revenue Bonds (Yale University), Series Z-3, 5.05%, 7/01/42 12,000 12,375,240 ----------------------------------------------------------------------------------------------------------------------------------- Florida - 1.6% Miami-Dade County, Florida, Aviation Revenue Refunding Bonds (Miami International Airport), AMT, 5%, 10/01/40 (d)(e) 10,000 9,159,904 ----------------------------------------------------------------------------------------------------------------------------------- BlackRock MuniVest Fund, Inc. Schedule of Investments May 31, 2008 (Unaudited) (Percentages shown are based on Net Assets) Par State Municipal Bonds Transferred to Tender Option Bond Trusts (000) Value ----------------------------------------------------------------------------------------------------------------------------------- Illinois - 9.0% Chicago, Illinois, O'Hare International Airport Revenue Bonds, Third Lien, AMT, Series B-2, 6%, 1/01/27 (g) $ 17,080 $ 17,792,919 Chicago, Illinois, Water Revenue Refunding Bonds, Second Lien, 5.25%, 11/01/33 (b) 13,300 1,411,803 Kane and De Kalb Counties, Illinois, Community Unit School District Number 302, GO, 5.75%, 2/01/18 (k) 2,975 3,363,208 Kane and De Kalb Counties, Illinois, Community Unit School District Number 302, GO, 5.75%, 2/01/19 (k) 2,710 3,063,628 Kane and De Kalb Counties, Illinois, Community Unit School District Number 302, GO, 5.75%, 2/01/21 (k) 4,780 5,403,742 Metropolitan Pier and Exposition Authority, Illinois, Dedicated State Tax Revenue Refunding Bonds (McCormick Place Expansion Project), Series B, 5.75%, 6/15/23 (g) 18,550 19,954,784 ------------- 50,990,084 ----------------------------------------------------------------------------------------------------------------------------------- Maryland - 0.9% Maryland State Transportation Authority, Transportation Facilities Projects Revenue Bonds, 5%, 7/01/41 (b) 4,700 4,852,807 ----------------------------------------------------------------------------------------------------------------------------------- Massachusetts - 3.6% Massachusetts State School Building Authority, Dedicated Sales Tax Revenue Bonds, Series A, 5%, 8/15/30 (b) 20,000 20,534,200 ----------------------------------------------------------------------------------------------------------------------------------- New York - 7.7% New York City, New York, City Transitional Finance Authority Revenue Bonds, Future Tax Secured, Series B, 6.25%, 11/15/18 13,500 14,680,035 New York State Dormitory Authority, State University Educational Facilities, Revenue Refunding Bonds, Series 1989, 6%, 5/15/10 (a)(g) 26,750 28,906,852 ------------- 43,586,887 ----------------------------------------------------------------------------------------------------------------------------------- North Carolina - 2.3% North Carolina Capital Facilities Finance Agency, Revenue Refunding Bonds (Duke University Project), Series A, 5%, 10/01/14 12,670 12,995,551 ----------------------------------------------------------------------------------------------------------------------------------- Oregon - 1.3% Portland, Oregon, Sewer System Revenue Bonds, Series A, 5.75%, 8/01/10 (a)(k) 6,610 7,080,963 ----------------------------------------------------------------------------------------------------------------------------------- Texas - 7.9% Harris County, Texas, Health Facilities Development Corporation, Revenue Refunding Bonds (School Health Care System), Series B, 5.75%, 7/01/27 (f) 20,970 24,156,601 Judson, Texas, Independent School District, School Building, GO, 5%, 2/01/37 (d) 6,000 6,109,440 Texas State Department of Housing and Community Affairs, S/F Mortgage Revenue Bonds, AMT, Series B, 5.25%, 9/01/32 (h)(i) 8,500 8,299,179 Texas State University, System Financing Revenue Refunding Bonds, 5%, 3/15/30 (b) 5,660 5,812,997 ------------- 44,378,217 ----------------------------------------------------------------------------------------------------------------------------------- Washington - 9.6% Central Puget Sound Regional Transportation Authority, Washington, Sales and Use Tax Revenue Bonds, Series A, 5%, 11/01/32 (b) 14,000 14,412,860 Central Puget Sound Regional Transportation Authority, Washington, Sales and Use Tax Revenue Bonds, Series A, 5%, 11/01/34 5,000 5,137,311 Central Puget Sound Regional Transportation Authority, Washington, Sales and Use Tax Revenue Bonds, Series A, 5%, 11/01/36 6,000 6,165,904 Energy Northwest, Washington, Electric Revenue Refunding Bonds (Columbia Generating Station), Series A, 5.75%, 7/01/18 (g) 11,660 12,535,433 BlackRock MuniVest Fund, Inc. Schedule of Investments May 31, 2008 (Unaudited) (Percentages shown are based on Net Assets) Par State Municipal Bonds Transferred to Tender Option Bond Trusts (o) (000) Value ----------------------------------------------------------------------------------------------------------------------------------- Energy Northwest, Washington, Electric Revenue Refunding Bonds (Project Number 1), Series B, 6%, 7/01/17 (g) $ 14,700 $ 16,107,966 ------------- 54,359,474 ----------------------------------------------------------------------------------------------------------------------------------- Total Municipal Bonds Transferred to Tender Option Bond Trusts (Cost - $256,207,058) - 46.1% 260,313,327 ----------------------------------------------------------------------------------------------------------------------------------- Short-Term Securities Shares ----------------------------------------------------------------------------------------------------------------------------------- Merrill Lynch Institutional Tax-Exempt Fund, 1.71% (p)(q) 42,900,000 42,900,000 ----------------------------------------------------------------------------------------------------------------------------------- Total Short-Term Securities (Cost - $42,900,000) - 7.6% 42,900,000 ----------------------------------------------------------------------------------------------------------------------------------- Total Investments (Cost - $997,231,780*) - 181.0% 1,021,287,786 Other Assets Less Liabilities - 3.5% 19,818,986 Liability for Trust Certificates, Including Interest Expense Payable - (25.3%) (142,469,194) Preferred Stock, at Redemption Value - (59.2%) (334,316,780) ------------- Net Assets Applicable to Common Stock - 100.0% $ 564,320,798 ============= * The cost and unrealized appreciation (depreciation) of investments as of May 31, 2008, as computed for federal income tax purposes, were as follows: Aggregate cost $ 858,615,037 ============= Gross unrealized appreciation $ 36,121,624 Gross unrealized depreciation (15,333,345) ------------- Net unrealized appreciation $ 20,788,279 ============= (a) U.S. government securities, held in escrow, are used to pay interest on this security as well as to retire the bond in full at the date indicated, typically at a premium to par. (b) FSA Insured. (c) Variable rate security. Rate shown is as of report date. Maturity shown is the final maturity date. (d) Assured Guaranty Insured. (e) XL Capital Insured. (f) Security is collateralized by Municipal or U.S. Treasury Obligations. (g) MBIA Insured. (h) FHLMC Collateralized. (i) FNMA/GNMA Collateralized. (j) AMBAC Insured. (k) FGIC Insured. (l) Represents a pay-in-kind security that may pay interest/dividends in additional face/shares. (m) Radian Insured. (n) FHA Insured. (o) Securities represents 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) 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: -------------------------------------------------------------------------- Net Dividend Affiliate Activity Income -------------------------------------------------------------------------- Merrill Lynch Institutional Tax-Exempt Fund 34,976,994 $ 310,466 -------------------------------------------------------------------------- (q) Represents the current yield as of report date. Item 2 - Controls and Procedures 2(a) - The registrant's principal executive and principal financial officers or persons performing similar functions have concluded that the registrant's disclosure controls and procedures (as defined in Rule 30a-3(c) under the Investment Company Act of 1940, as amended (the "1940 Act")) are effective as of a date within 90 days of the filing of this report based on the evaluation of these controls and procedures required by Rule 30a-3(b) under the 1940 Act and Rule 13a-15(b) under the Securities Exchange Act of 1934, as amended. 2(b) - There were no changes in the registrant's internal control over financial reporting (as defined in Rule 30a-3(d) under the 1940 Act) that occurred during the registrant's last fiscal quarter that have materially affected, or are 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. BlackRock MuniVest Fund, Inc. By: /s/ Donald C. Burke -------------------------------- Donald C. Burke Chief Executive Officer of BlackRock MuniVest Fund, Inc. Date: July 18, 2008 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/ Donald C. Burke -------------------------------- Donald C. Burke Chief Executive Officer (principal executive officer) of BlackRock MuniVest Fund, Inc. Date: July 18, 2008 By: /s/ Neal J. Andrews -------------------------------- Neal J. Andrews Chief Financial Officer (principal financial officer) of BlackRock MuniVest Fund, Inc. Date: July 18, 2008