bkn.htm - Produced by Pellegrini and Associates, Inc. | 134 Spring Street New York NY 10012 | (212) 925-5151

UNITEDSTATES
SECURITIESANDEXCHANGECOMMISSION
Washington,D.C.20549

FORM N-Q

QUARTERLY SCHEDULE OF PORTFOLIO HOLDINGS OF REGISTERED
MANAGEMENT INVESTMENT COMPANY

Investment Company Act file number 811-07354

Name of Fund: BlackRock Investment Quality Municipal Trust, Inc. (BKN)

Fund Address: 100 Bellevue Parkway, Wilmington, DE 19809

Name and address of agent for service: Anne F. Ackerley, Chief Executive Officer, BlackRock
Investment Quality Municipal Trust, Inc., 40 East 52nd Street, New York, NY 10022.

Registrant’s telephone number, including area code: (800) 882-0052, Option 4

Date of fiscal year end: 04/30/2010

Date of reporting period: 07/31/2009

Item 1 – Schedule of Investments

BlackRock Investment Quality Municipal Trust         
Schedule of Investments July 31, 2009 (Unaudited)    (Percentages shown are based on Net Assets) 
          Par   
State    Municipal Bonds      (000)       Value 
Arizona - 5.7%  City of Goodyear Arizona, GO (FSA), 4.25%, 7/01/36  $ 2,125  $ 1,859,247 
    Glendale Municipal Property Corp., Arizona, RB, Series A     
    (FSA), 4.50%, 7/01/32      1,150  1,079,505 
    Mohave County Unified School District No. 20 Kingman, GO,     
    School Improvement, Project 2006, Series C (AGC), 5.00%,     
    7/01/26      1,800  1,875,672 
    Salt Verde Financial Corp., RB, Senior, 5.00%, 12/01/32  1,035  814,442 
    Salt Verde Financial Corp., RB, Senior, 5.00%, 12/01/37  4,585  3,488,360 
    San Luis Facility Development Corp., RB, Senior Lien     
    Project, Regional Detention Center, 6.25%, 5/01/15  490  442,646 
    San Luis Facility Development Corp., RB, Senior Lien     
    Project, Regional Detention Center, 7.00%, 5/01/20  490  437,193 
    San Luis Facility Development Corp., RB, Senior Lien     
    Project, Regional Detention Center, 7.25%, 5/01/27  980  846,975 
    University Medical Center Corp., Arizona, RB, 6.50%, 7/01/39  750  754,298 
            11,598,338 
California - 23.6%  California County Tobacco Securitization Agency, RB, CAB,     
    Stanislaus, Sub-Series C, 6.30%, 6/01/55 (a)    7,090  63,172 
    California State Department of Veterans Affairs, California,     
    RB, Series B, AMT, 5.25%, 12/01/37      5,000  4,031,200 
    Carlsbad Unified School District, GO, Election, Series B,     
    6.09%, 5/01/34 (b)      1,500  844,035 
    County of Sacramento California, RB, Senior, Series A (FSA),     
    5.00%, 7/01/41      2,000  1,844,640 
    Dinuba Unified School District, GO, Election of 2006 (FSA),     
    5.63%, 8/01/31      250  257,025 
    Dinuba Unified School District, GO, Election of 2006 (FSA),     
    5.75%, 8/01/33      535  548,493 
    Foothill Eastern Transportation Corridor Agency, California,     
    Refunding RB, 5.75%, 1/15/40      3,495  2,708,695 
    Foothill Eastern Transportation Corridor Agency, California,     
    Refunding, RB, CAB, 5.88%, 7/15/28 (b)    7,000  5,750,850 
    Golden State Tobacco Securitization Corp., California, RB,     
    Asset Backed, Senior, Series A-1, 5.13%, 6/01/47    805  433,452 
Portfolio Abbreviations           
To simplify the listings of portfolio holdings in the Schedule of Investments, the names and descriptions of many of the 
securities have been abbreviated according to the following list.         
AGC  Assured Guaranty Corp.  GNMA  Government National Mortgage Association 
AMBAC  American Municipal Bond Assurance Corp.  GO  General Obligation Bonds   
AMT  Alternative Minimum Tax (subject to)  HFA  Housing Finance Agency   
CAB  Capital Appreciation Bonds  IDA  Industrial Development Authority   
CIFG  CDC IXIS Financial Guarantee  MBIA  Municipal Bond Investors Assurance (National 
COP  Certificates of Participation    Public Finance Guaranty Corp.)   
EDA  Economic Development Authority  PILOT  Payment in Lieu of Taxes   
FGIC  Financial Guaranty Insurance Co.  RB  Revenue Bonds     
FSA  Financial Security Assurance Inc.  TAN  Tax Anticipation Notes   
1

BlackRock Investment Quality Municipal Trust       
Schedule of Investments July 31, 2009 (Unaudited)  (Percentages shown are based on Net Assets) 
      Par   
State  Municipal Bonds    (000)       Value 
  Los Altos School District, California, GO, CAB, Election of     
  1998, Series B (MBIA), 5.93%, 8/01/13 (a)(c)    $ 10,945  $ 5,444,590 
  San Diego Community College District, California, GO, CAB,     
  Election of 2002, 6.11%, 8/01/19 (b)    4,200  2,325,456 
  State of California, GO, 5.00%, 2/01/32    5,340  4,978,215 
  State of California, GO, Various Purpose, 5.75%, 4/01/31  3,000  3,075,750 
  State of California, GO, Various Purpose, 5.00%, 6/01/32  4,545  4,234,440 
  State of California, GO, Various Purpose, 6.50%, 4/01/33  2,900  3,135,248 
  State of California, GO, Various Purpose (CIFG), 5.00%,     
  3/01/33    5,000  4,652,950 
  University of California, RB, Limited Project, Series B,     
  4.75%, 5/15/38    4,185  3,928,878 
        48,257,089 
Colorado - 1.3%  City of Colorado Springs Colorado, RB, Subordinate Lien,     
  Improvement, Series C (FSA), 5.00%, 11/15/45    1,030  1,003,014 
  Colorado Health Facilities Authority, RB, Series B (FSA),     
  5.25%, 3/01/36    1,750  1,715,507 
        2,718,521 
Connecticut - 0.8%  Mashantucket Western Pequot Tribe, RB, Sub-Series A,     
  5.50%, 9/01/28 (d)    3,000  1,594,260 
District of Columbia - 2.1%  District of Columbia Tobacco Settlement Financing Corp.,     
  RB, Asset Backed Bonds, 6.50%, 5/15/33    4,960  4,196,160 
Florida - 12.9%  County of Miami-Dade Florida, RB, CAB, Sub-Series A (MBIA),     
  5.20%, 10/01/32 (a)    4,225  833,592 
  County of Miami-Dade Florida, RB, CAB, Sub-Series A (MBIA),     
  5.21%, 10/01/33 (a)    4,000  731,880 
  County of Miami-Dade Florida, RB, CAB, Sub-Series A (MBIA),     
  5.21%, 10/01/34 (a)    4,580  779,241 
  County of Miami-Dade Florida, RB, CAB, Sub-Series A (MBIA),     
  5.22%, 10/01/35 (a)    5,000  793,450 
  County of Miami-Dade Florida, RB, CAB, Sub-Series A (MBIA),     
  5.23%, 10/01/36 (a)    10,000  1,484,600 
  County of Miami-Dade Florida, RB, CAB, Sub-Series A (MBIA),     
  5.24%, 10/01/37 (a)    10,000  1,340,600 
  County of Orange Florida, Refunding RB (Syncora), 4.75%,     
  10/01/32    5,000  4,536,150 
  Fishhawk Community Development District II, TAN, Series A,     
  6.13%, 5/01/34    1,990  1,588,080 
  Hillsborough County IDA, RB, National Gypsum, Series A,     
  AMT, 7.13%, 4/01/30    3,700  2,074,479 
  Miami Beach Health Facilities Authority, Refunding RB,     
  Mount Sinai Medical Center Florida, 6.75%, 11/15/21  3,770  3,183,388 
  Sumter Landing Community Development District, Florida,     
  RB, Sub-Series Series B, 5.70%, 10/01/38    3,685  2,361,201 
  Village Community Development District No. 6, Special     
  Assessment, 5.63%, 5/01/22    7,370  6,603,815 
        26,310,476 
2

BlackRock Investment Quality Municipal Trust       
Schedule of Investments July 31, 2009 (Unaudited)  (Percentages shown are based on Net Assets) 
      Par   
State  Municipal Bonds    (000)       Value 
Georgia - 1.6%  City of Atlanta Georgia, RB (FSA), 5.00%, 11/01/34  $ 1,500  $ 1,482,915 
  Milledgeville & Baldwin County Development Authority, RB,     
  Georgia College & State University Foundation, 6.00%,     
  9/01/14 (c)    1,500  1,822,725 
        3,305,640 
Hawaii - 1.2%  Hawaii State Department of Budget & Finance, RB,     
  Refunding, Hawaiian Electric Co. Inc., Series D (AMBAC),     
  AMT, 6.15%, 1/01/20    2,500  2,504,600 
Idaho - 1.7%  Idaho Health Facilities Authority, RB, Trinity Health Group,     
  Series B, 6.25%, 12/01/33    2,500  2,638,950 
  Idaho Housing & Finance Association, RB, Grant & Revenue     
  Anticipation, Federal Highway Trust, Series A, 5.00%,     
  7/15/27    900  921,249 
        3,560,199 
Illinois - 8.2%  CenterPoint Intermodal Center Program Trust, TAN, 144A,     
  8.00%, 6/15/23 (d)    1,920  998,976 
  Chicago Public Building Commission Building, Illinois, RB,     
  Series A (MBIA), 7.00%, 1/01/20 (e)    5,000  6,464,350 
  Illinois Finance Authority, RB, Friendship Village       
  Schaumburg, Series A, 5.63%, 2/15/37    690  460,161 
  Illinois Finance Authority, RB, Illinois Rush University     
  Medical Center, Series C, 6.63%, 11/01/39    1,200  1,204,536 
  Illinois Finance Authority, RB, MJH Education Assistance IV,     
  Sub-Series B, 5.38%, 6/01/35 (f)(g)    700  68,775 
  Illinois Finance Authority, RB, Monarch Landing Inc.     
  Facilities, Series A, 7.00%, 12/01/37    1,156  653,765 
  Illinois Finance Authority, RB, Northwestern Memorial     
  Hospital, Series A, 5.50%, 8/15/14 (c)    5,800  6,789,654 
        16,640,217 
Iowa - 1.8%  Iowa Finance Authority, RB, Series A, Remarketed (AGC),     
  5.63%, 8/15/37    3,600  3,582,288 
Kentucky - 3.9%  Kentucky Economic Development Finance Authority,     
  Kentucky, RB, Louisville Arena, Sub-Series A-1 (AGC), 6.00%,     
  12/01/38    700  719,236 
  Kentucky Economic Development Finance Authority, Kentucky, RB,     
  Norton Healthcare Inc., Series B (MBIA), 6.19%, 10/01/23 (a)  13,500  5,015,385 
  Louisville, Jefferson County Metropolitan Government, RB, Jewish     
  Hospital Saint Mary's Healthcare, 6.13%, 2/01/37    2,250  2,242,575 
        7,977,196 
Maryland - 1.6%  Maryland Community Development Administration, RB,     
  Residential, Series A, AMT, 4.80%, 9/01/42    3,000  2,599,170 
  Maryland Health & Higher Educational Facilities Authority,     
  RB, FHA Insured Mortgage, Western Maryland Health, Series     
  A (MBIA), 4.75%, 7/01/36    750  656,227 
        3,255,397 
Michigan - 3.1%  Michigan State Building Authority, Refunding RB, Facilities     
  Program, Series I, 6.25%, 10/15/38    1,876  2,006,081 
3

BlackRock Investment Quality Municipal Trust       
Schedule of Investments July 31, 2009 (Unaudited)  (Percentages shown are based on Net Assets) 
      Par   
State  Municipal Bonds    (000)       Value 
  Michigan State Hospital Finance Authority, Michigan, RB,     
  Refunding, Henry Ford Health System, Series A, 5.25%,     
  11/15/46    $ 1,670  $ 1,268,849 
  Royal Oak Hospital Finance Authority, Michigan, RB, William     
  Beaumont Hospital, 8.25%, 9/01/39    2,750  3,102,193 
        6,377,123 
Minnesota - 1.9%  City of Minneapolis Minnesota, RB, Fairview Health Services,     
  Series B (AGC), 6.50%, 11/15/38    3,500  3,812,655 
Mississippi - 3.9%  Mississippi Development Bank Special Obligation, RB,     
  Jackson County Limited Tax Note (AGC), 5.50%, 7/01/32  2,655  2,685,214 
  Mississippi Development Bank SO, RB, Jones Co. Junior     
  College (AGC), 5.13%, 3/01/39    1,500  1,513,725 
  University of Southern Mississippi, RB, Campus Facilities     
  Improvement Project, 5.38%, 9/01/36    3,750  3,857,138 
        8,056,077 
Missouri - 3.2%  Missouri Housing Development Commission, RB,       
  Homeownership Loan Program, Series B-1 (GNMA), AMT,     
  5.05%, 3/01/38    4,376  4,378,150 
  Missouri Joint Municipal Electric Utility Commission, RB,     
  Plum Point Project (MBIA), 4.60%, 1/01/36    2,820  2,122,445 
        6,500,595 
Multi-State - 4.8%  Charter Mac Equity Issuer Trust, 7.60%, 11/30/50 (d)(h)  7,000  7,300,300 
  MuniMae TE Bond Subsidiary LLC, 7.75%, 6/30/50 (d)(h)  4,000  2,599,080 
        9,899,380 
Nebraska - 1.3%  Omaha Public Power District, RB, System, Series A, 4.75%,     
  2/01/44    2,765  2,583,201 
Nevada - 0.9%  County of Clark Nevada, Refunding RB, Alexander Dawson     
  School, Nevada Project, 5.00%, 5/15/29    2,065  1,936,516 
New Jersey - 6.7%  Middlesex County Improvement Authority, RB, Sub, Heldrich     
  Center Hotel, Series B, 6.25%, 1/01/37    1,510  769,889 
  New Jersey EDA, RB, Cigarette Tax, 5.75%, 6/15/29  7,000  5,823,300 
  New Jersey EDA, RB, Motor Vehicle Surcharge Revenue,     
  Series A (MBIA), 5.00%, 7/01/27    1,150  1,147,251 
  New Jersey Educational Facilities Authority, Refunding RB,     
  University Medical & Dentistry, Series B, 7.13%, 12/01/23  950  1,006,686 
  New Jersey Educational Facilities Authority, Refunding RB,     
  University Medical & Dentistry, Series B, 7.50%, 12/01/32  1,225  1,294,592 
  New Jersey Health Care Facilities Financing Authority, RB,     
  Virtua Health (AGC), 5.50%, 7/01/38    2,250  2,246,647 
  New Jersey State Housing & Mortgage Finance Agency, RB,     
  Series AA, 6.50%, 10/01/38    1,250  1,329,687 
        13,618,052 
New York - 13.4%  Albany Industrial Development Agency, RB, New Covenant     
  Charter School Project, Series A, 7.00%, 5/01/35    726  451,979 
  City of New York New York, GO, Sub-Series J-1, 4.50%,     
  5/15/30    1,500  1,425,585 
4

BlackRock Investment Quality Municipal Trust       
Schedule of Investments July 31, 2009 (Unaudited)  (Percentages shown are based on Net Assets) 
      Par   
State  Municipal Bonds    (000)       Value 
  Hudson Yards Infrastructure Corp., RB, Series A (FGIC),     
  5.00%, 2/15/47    $ 1,400  $ 1,195,838 
  Long Island Power Authority, RB, General, Series C (CIFG),     
  5.25%, 9/01/29    2,000  2,044,940 
  Long Island Power Authority, RB, Series A, 6.25%, 4/01/33  480  530,942 
  Long Island Power Authority, RB, Series A, 5.75%, 4/01/39  2,475  2,575,856 
  Metropolitan Transportation Authority, RB, Series B, 5.00%,     
  11/15/34    1,200  1,177,608 
  Metropolitan Transportation Authority, Refunding RB,     
  Insured, Series A (MBIA), 5.00%, 11/15/25    750  755,137 
  New York City Industrial Development Agency, RB, American     
  Airlines, JFK International Airport, AMT, 7.63%, 8/01/25  2,600  2,043,080 
  New York City Industrial Development Agency, RB, Queens     
  Baseball Stadium, PILOT (AGC), 6.50%, 1/01/46    1,100  1,196,811 
  New York City Transitional Finance Authority, RB, Fiscal     
  2007, Series S-1 (MBIA), 5.00%, 7/15/24    2,000  2,030,920 
  New York Liberty Development Corp., RB, Goldman Sachs     
  Headquarters, 5.25%, 10/01/35    2,000  1,880,280 
  New York State Dormitory Authority, RB, 5.83%, 7/01/39 (b)  1,825  1,363,841 
  New York State Dormitory Authority, RB, Rochester Institute     
  Technology, Series A, 6.00%, 7/01/33    1,625  1,704,918 
  New York State Dormitory Authority, RB, University Rochester     
  Deferred Income, Series (MBIA), 7.22%, 7/01/10 (b)(c)  1,865  1,867,182 
  New York State Dormitory Authority, RB, University Rochester     
  Deferred Income, Series (MBIA), 7.27%, 7/01/10 (b)(c)  2,030  2,032,375 
  New York State Dormitory Authority, RB, University     
  Rochester, Series A, 5.13%, 7/01/39    550  542,927 
  New York State Dormitory Authority, RB, Yeshiva University,     
  5.00%, 9/01/38    500  490,210 
  Port Authority of New York & New Jersey, RB, Consolidated, One     
  Hundred Fifty, Second, AMT, 5.75%, 11/01/30    1,000  1,033,420 
  State of New York, GO, Series A, 5.00%, 2/15/39    950  960,764 
        27,304,613 
North Carolina - 2.1%  Gaston County Industrial Facilities & Pollution Control Financing     
  Authority, North Carolina, RB, Exempt Facilities, National Gypsum     
  Co. Project, AMT, 5.75%, 8/01/35    2,425  1,359,625 
  North Carolina Medical Care Commission, North Carolina,     
  RB, University Health System, Series D, 6.25%, 12/01/33  1,750  1,859,095 
  North Carolina Medical Care Commission, North Carolina,     
  RB, WakeMed, Series A (AGC), 5.88%, 10/01/38    1,000  1,028,790 
        4,247,510 
Ohio - 4.6%  County of Cuyahoga Ohio, Refunding RB, Series A, 6.00%,     
  1/01/20    3,485  3,716,996 
  County of Cuyahoga Ohio, Refunding RB, Series A, 6.00%,     
  1/01/21    5,000  5,308,750 
5

BlackRock Investment Quality Municipal Trust       
Schedule of Investments July 31, 2009 (Unaudited)  (Percentages shown are based on Net Assets) 
      Par   
State  Municipal Bonds    (000)       Value 
  Ohio Air Quality Development Authority, Refunding RB,     
  Pollution, Dayton, Series B (FGIC), 4.80%, 1/01/34  $ 400  $ 401,948 
        9,427,694 
Oklahoma - 1.2%  Tulsa Municipal Airport Trust Trustees, Oklahoma, Refunding RB,     
  Series A Remarketed, AMT, 7.75%, 6/01/35    2,900  2,380,610 
Oregon - 1.1%  Oregon Health & Science University, RB, Series A, 5.75%,     
  7/01/39    2,250  2,251,553 
Pennsylvania - 5.8%  Delaware River Port Authority, RB, Port District Project,     
  Series B (FSA), 5.70%, 1/01/22    2,000  2,006,500 
  McKeesport Area School District, GO, CAB (FGIC), 5.53%,     
  10/01/31 (a)(e)    870  289,249 
  McKeesport Area School District, GO, CAB (FGIC), 5.53%,     
  10/01/31 (a)    2,435  600,666 
  Pennsylvania Economic Development Financing Authority,     
  RB, Amtrak Project, Series A, AMT, 6.25%, 11/01/31  2,000  1,784,040 
  Pennsylvania Economic Development Financing Authority,     
  RB, Amtrak Project, Series A, AMT, 6.38%, 11/01/41  3,100  2,752,583 
  Pennsylvania Economic Development Financing Authority, RB,     
  Reliant Energy, Series A-12-22-04, AMT, 6.75%, 12/01/36  4,645  4,311,768 
        11,744,806 
Puerto Rico - 4.1%  Puerto Rico Electric Power Authority, Refunding RB, Series     
  UU (FSA), 5.00%, 7/01/23    2,900  2,948,227 
  Puerto Rico HFA, RB, Sub, Capital Fund Modernization,     
  5.13%, 12/01/27    2,500  2,502,750 
  Puerto Rico Sales Tax Financing Corp., RB, First Sub-Series     
  A, 5.75%, 8/01/37    3,000  2,967,060 
        8,418,037 
Rhode Island - 2.4%  Rhode Island Health & Educational Building Corp., RB,     
  Balance, Hospital, Lifespan (MBIA), 5.50%, 5/15/16  200  200,058 
  Rhode Island Health & Educational Building Corp., RB,     
  Hospital Financing, Lifespan Obligation, Series A (AGC),     
  7.00%, 5/15/39    3,000  3,311,430 
  Rhode Island State & Providence Plantations, COP, Series C,     
  School For The Deaf (AGC), 5.38%, 4/01/28    1,330  1,323,696 
        4,835,184 
South Carolina - 5.5%  South Carolina Jobs-EDA, RB, Palmetto Health, C, 6.88%,     
  8/01/13 (c)    4,000  4,674,348 
  South Carolina Jobs-EDA, Refunding RB, Palmetto Health     
  Alliance, Series A, 6.25%, 8/01/31    2,185  2,037,097 
  South Carolina State Housing Finance & Development     
  Authority, South Carolina, RB, Series A-2 (AMBAC), AMT,     
  5.15%, 7/01/37    4,975  4,607,746 
        11,319,191 
Tennessee - 3.4%  Memphis-Shelby County Airport Authority, RB, Series D     
  (AMBAC), AMT, 6.00%, 3/01/24    4,865  4,884,314 
  Memphis-Shelby County Sports Authority Inc., Refunding RB,     
  Memphis Arena Project, Series A, 5.25%, 11/01/27  1,135  1,121,777 
6

BlackRock Investment Quality Municipal Trust       
Schedule of Investments July 31, 2009 (Unaudited)  (Percentages shown are based on Net Assets) 
      Par   
State  Municipal Bonds    (000)       Value 
  Memphis-Shelby County Sports Authority Inc., Refunding RB,     
  Memphis Arena Project, Series A, 5.38%, 11/01/28  $ 1,000  $ 995,760 
        7,001,851 
Texas - 12.7%  City of Grapevine Texas, GO, Certificates Obligation (FGIC),     
  5.88%, 8/15/10 (c)    6,000  6,336,420 
  Harris County Health Facilities Development Corp.,     
  Refunding RB, Memorial Hermann Healthcare System, Series     
  B, 7.13%, 12/01/31    1,000  1,079,400 
  Harris County Health Facilities Development Corp.,     
  Refunding RB, Memorial Hermann Healthcare System, Series     
  B, 7.25%, 12/01/35    2,650  2,862,185 
  Harris County-Houston Sports Authority, Refunding RB, CAB,     
  Senior Lien, Series A (MBIA), 6.17%, 11/15/38 (a)    5,000  527,200 
  Lower Colorado River Authority, RB, Refunding &       
  Improvement (MBIA), 5.00%, 5/15/13 (c)    20  22,656 
  Lower Colorado River Authority, Refunding RB (AMBAC),     
  4.75%, 5/15/36    3,595  3,219,071 
  Lower Colorado River Authority, Refunding RB, Series A     
  (MBIA), 5.00%, 5/15/13 (c)    5  5,664 
  Matagorda County Navigation District No. 1, Texas,     
  Refunding RB, Central Power & Light Co. Project, Series A,     
  Remarketed, 6.30%, 11/01/29    2,200  2,282,060 
  SA Energy Acquisition Public Facility Corp., RB, Gas Supply     
  Revenue, 5.50%, 8/01/24    2,550  2,372,597 
  State of Texas, GO, Refunding, Water Financial Assistance,     
  5.75%, 8/01/22    1,000  1,030,700 
  Texas State Turnpike Authority, RB, CAB (AMBAC), 6.05%,     
  8/15/31 (a)    15,000  3,421,350 
  Texas State Turnpike Authority, RB, First Tier, Series A     
  (AMBAC), 5.00%, 8/15/42    3,325  2,765,768 
        25,925,071 
Virginia - 0.8%  Tobacco Settlement Financing Corp., Virginia, RB, Senior,     
  Series B-1, 5.00%, 6/01/47    2,900  1,575,541 
Washington - 1.2%  County of King Washington, Refunding RB (FSA) 5.00%,     
  1/01/36    200  199,700 
  Washington Health Care Facilities Authority, Washington, RB,     
  Multicare Health System, Series B (AGC), 6.00%, 8/15/39  2,100  2,149,854 
        2,349,554 
Wisconsin - 1.5%  Wisconsin Health & Educational Facilities Authority, RB,     
  Aurora Health Care, 6.40%, 4/15/33    3,220  3,090,910 
Wyoming - 0.9%  Wyoming Community Development Authority, Wyoming, RB,     
  Series 3, AMT, 4.75%, 12/01/37    2,145  1,857,377 
  Total Municipal Bonds - 152.9%      312,013,482 
  Municipal Bonds Transferred to       
  Tender Option Bond Trusts (i)       
Colorado - 2.5%  Colorado Health Facilities Authority, RB, Catholic Health,     
  Series C7 (FSA), 5.00%, 9/01/36    5,250  5,120,482 
7

BlackRock Investment Quality Municipal Trust       
Schedule of Investments July 31, 2009 (Unaudited)  (Percentages shown are based on Net Assets) 
  Municipal Bonds Transferred to    Par   
State  Tender Option Bond Trusts (i)    (000)           Value 
Illinois - 1.6%  Chicago Housing Authority, Illinois, Refunding RB (FSA),     
  5.00%, 7/01/24    $ 3,194  $ 3,238,359 
Massachusetts - 1.4%  Massachusetts Water Resources Authority, Refunding RB,     
  Series A, 5.00%, 8/01/41    3,070  2,988,768 
Ohio - 2.1%  County of Montgomery, Ohio, RB, Catholic Health, Series C1     
  (FSA), 5.00%, 10/01/41    1,740  1,619,192 
  Ohio State Higher Educational Facility Commission, Refunding RB,   
  Hospital, Cleveland Clinic, Series A,       
  5.25%, 1/01/33    2,600  2,608,658 
        4,227,850 
New York - 2.4%  New York City Municipal Water Finance Authority, RB, Fiscal     
  2009, Series A, 5.75%, 6/15/40    690  739,010 
  New York City Municipal Water Finance Authority, RB, Series     
  FF-2, 5.50%, 6/15/40    809  850,964 
  New York State Dormitory Authority, RB, New York     
  University, Series A, 5.00%, 7/01/38    3,359  3,343,620 
        4,933,594 
  Total Municipal Bonds Transferred to     
  Tender Option Bond Trusts - 10.0%      20,509,053 
  Total Long-Term Investments (Cost - $356,116,940) - 162.9%  332,522,535 
  Short-Term Securities    Shares   
  FFI Institutional Tax-Exempt Fund, 0.42% (j)(k)  8,400,000  8,400,000 
  Total Short-Term Securities (Cost - $8,400,000) - 4.1%    8,400,000 
  Total Investments (Cost - $364,516,940*) - 167.0%    340,922,535 
  Other Assets Less Liabilities - 0.2%      340,925 
  Liability for Trust Certificates, Including Interest     
     Expense and Fees Payable - (5.5)%      (11,144,670) 
  Preferred Shares, at Redemption Value - (61.7)%    (125,971,529) 
  Net Assets Applicable to Common Shares - 100.0%    $ 204,147,261 
                 * The cost and unrealized appreciation (depreciation) of investments as of July 31, 2009, as computed for federal 
                     income tax purposes, were as follows:       
                     Aggregate cost    $ 353,079,011   
                     Gross unrealized appreciation  $ 11,102,024   
                     Gross unrealized depreciation    (34,395,901)   
                     Net unrealized depreciation  $ (23,293,877)   
             (a) Represents a zero-coupon bond. Rate shown reflects the effective yield as of report date.   
             (b) Represents a step-up bond that pays an initial coupon rate for the first period and then a higher coupon rate for the 
                     following periods. Rate shown reflects the effective yield as of report date.     
             (c) US 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.       
             (d) Security exempt from registration under Rule 144A of the Securities Act of 1933. These securities may be resold in 
                     transactions exempt from registration to qualified institutional investors.     
             (e) Security is collateralized by Municipal or US Treasury Obligations.     
             (f) Non-income producing security.       
             (g) Issuer filed for bankruptcy and/or is in default of interest payments.     
8

BlackRock Investment Quality Municipal Trust       
Schedule of Investments July 31, 2009 (Unaudited)       
             (h) Security represents a beneficial interest in a trust. The collateral deposited into the trust is federally tax-exempt 
                     revenue bonds issued by various state or local governments, or their respective agencies or authorities. The security is 
                     subject to mandatory redemption at maturity.       
             (i) Securities represent bonds transferred to a tender option bond trust in exchange for which the Trust acquired residual 
                     interest certificates. These securities serve as collateral in a financing transaction.     
             (j) Investments in companies considered to be an affiliate of the Trust, for purposes of Section 2(a)(3)  of the Investment 
                     Company Act of 1940, were as follows:       
  Net     
                     Affiliate  Activity  Income   
                     FFI Institutional Tax-Exempt Fund                 (3,000,000)  $ 485 
             (k) Represents the current yield as of report date.       
9

BlackRock Investment Quality Municipal Trust   
Schedule of Investments July 31, 2009 (Unaudited)     
           Ÿ  Financial Accounting Standards Board Statement of Financial Accounting Standards No. 157, "Fair Value Measurements" 
  clarifies the definition of fair value, establishes a framework for measuring fair values and requires additional 
  disclosures about the use of fair value measurements. Various inputs are used in determining the fair value of 
  investments, which are as follows:     
                     Ÿ  Level 1 - price quotations in active markets/exchanges for identical securities 
                     Ÿ  Level 2 - other observable inputs (including, but not limited to: quoted prices for similar assets or liabilities 
    in markets that are active, quoted prices for identical or similar assets or liabilities in markets that are not 
    active, inputs other than quoted prices that are observable for the assets or liabilities (such as interest 
    rates, yield curves, volatilities, prepayment speeds, loss severities, credit risks and default rates) or other 
    market-corroborated inputs)     
                     Ÿ  Level 3 - unobservable inputs based on the best information available in the circumstances, to the extent 
    observable inputs are not available (including the Fund's own assumptions used in determining the fair value 
    of investments)     
  The inputs or methodology used for valuing securities are not necessarily an indication of the risk associated with 
  investing in those securities.     
  The following table summarizes the inputs used as of July 31, 2009 in determining the fair valuation of the Trust's 
  investments:     
  Valuation      Investments in 
  Inputs      Securities 
        Assets 
  Level 1 - Short-Term Securities  $ 8,400,000 
  Level 2 - Long-Term Investments1    332,522,535 
  Level 3      - 
  Total    $ 340,922,535 
  1 See above Schedule of Investments for values in each state or political classification. 
10

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 13(a)-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 Investment Quality Municipal Trust, Inc.

By: /s/Anne F. Ackerley
Anne F. Ackerley
Chief Executive Officer of
BlackRock Investment Quality Municipal Trust, Inc.

Date: September 22, 2009

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/Anne F. Ackerley
Anne F. Ackerley
Chief Executive Officer (principal executive officer) of
BlackRock Investment Quality Municipal Trust, Inc.

Date: September 22, 2009

By: /s/ Neal J. Andrews
Neal J. Andrews
Chief Financial Officer (principal financial officer) of
BlackRock Investment Quality Municipal Trust, Inc.

Date: September 22, 2009