BlackRock MuniHoldings Fund (MHD) NPORT-P BlackRock MuniHoldings Fund, Inc. (Jan 2020 report)

Schedule of Investments  (unaudited) January 31, 2020 BlackRock MuniHoldings Fund, Inc. (MHD) (Percentages shown are based on Net Assets)

Security	Par (000)		Value
Municipal Bonds — 115.2%
Alabama — 2.0%
County of Jefferson Alabama Sewer, Refunding RB:
Senior Lien, Series A (AGM), 5.00%, 10/01/44	$	570	$	643,425
Senior Lien, Series A (AGM), 5.25%, 10/01/48		1,090		1,244,900
Sub-Lien, Series D, 6.00%, 10/01/42		1,000		1,182,340
Sub-Lien, Series D, 7.00%, 10/01/51		1,545		1,869,867
				4,940,532
Arizona — 3.4%
City of Phoenix Arizona IDA, RB, Legacy Traditional Schools Projects, Series A, 5.00%, 07/01/46(a)		1,230		1,335,756
City of Phoenix Civic Improvement Corp., ARB, Series A, 4.00%, 07/01/45		940		1,065,170
Salt Verde Financial Corp., RB, Senior:
5.00%, 12/01/32		2,000		2,638,580
5.00%, 12/01/37		2,360		3,258,381
				8,297,887
Arkansas — 1.0%
Arkansas Development Finance Authority, RB:
Baptist Health, 5.00%, 12/01/47		385		468,341
Big River Steel Project, AMT, 4.50%, 09/01/49(a)		1,810		1,962,275
				2,430,616
California — 6.5%
California Educational Facilities Authority, RB, Stanford University, SeriesV-1, 5.00%, 05/01/49		1,545		2,503,503
California Health Facilities Financing Authority, RB, Sutter Health, Series B, 6.00%, 08/15/20(b)		2,200		2,259,994
California Health Facilities Financing Authority, Refunding RB, St. Joseph Health System, Series A, 5.00%, 07/01/33		875		989,406
California Municipal Finance Authority, RB, Senior, Caritas Affordable Housing, Inc. Projects, S/F Housing, Series A:
5.25%, 08/15/39		105		119,528
5.25%, 08/15/49		265		297,378
California Municipal Finance Authority, Refunding RB, Community Medical Centers, Series A, 5.00%, 02/01/42		165		197,893

Security	Par (000)		Value
California (continued)
California Pollution Control Financing Authority, RB, Poseidon Resources (Channel Side) LP Desalination Project, AMT, 5.00%, 11/21/45(a)	$	1,025	$	1,110,885
California Statewide Communities Development Authority, RB, Loma Linda University Medical Center, Series A, 5.00%, 12/01/46(a)		330		373,567
City of Stockton California Public Financing Authority, RB, Delta Water Supply Project, Series A, 6.25%, 10/01/23(b)		255		304,411
Golden State Tobacco Securitization Corp., Refunding RB, SeriesA-1, 5.00%, 06/01/47		1,950		2,050,698
Montebello Unified School District, GO, CAB (NPFGC), 0.00%, 08/01/22(c)		2,405		2,332,465
San Diego Unified School District California, GO, CAB, Election of 2008, Series A, 0.00%, 07/01/29(c)		3,475		2,983,218
State of California Public Works Board, LRB, Various Capital Projects, Series I, 5.00%, 11/01/38		550		627,577
				16,150,523
Colorado — 3.1%
Colorado Educational & Cultural Facilities Authority, RB, Charter School, Colorado Springs, 5.50%, 07/01/40		1,455		1,477,291
Colorado Health Facilities Authority, RB, Commonspirit Health, Series A, 4.00%, 08/01/49		1,065		1,181,788
Colorado Health Facilities Authority, Refunding RB, Commonspirit Health, Series A, 4.00%, 08/01/44		220		245,113
County of Arapahoe Colorado School District No. 6 Littleton, GO, Series A, 5.50%, 12/01/43		1,260		1,651,091
Regional Transportation District, COP, Refunding, Series A, 5.38%, 06/01/31		710		720,323
Regional Transportation District, RB, Denver Transit Partners Eagle P3 Project, 6.00%, 01/15/34		1,425		1,443,440

1

Schedule of Investments  (unaudited) (continued) January 31, 2020 BlackRock MuniHoldings Fund, Inc. (MHD) (Percentages shown are based on Net Assets)

Security	Par (000)		Value
Colorado (continued)
State of Colorado, COP, Building Excellent Schools, Series O, 4.00%, 03/15/44	$	930	$	1,064,357
				7,783,403
Connecticut — 1.1%
State of Connecticut, GO, Series A, 4.00%, 01/15/38		2,260		2,626,097
Delaware — 1.7%
County of Sussex Delaware, RB, NRG Energy, Inc., Indian River Power LLC Project, 6.00%, 10/01/40		790		816,702
Delaware Transportation Authority, RB, U.S. 301 Project, 5.00%, 06/01/55		840		966,739
State of Delaware EDA, RB, Exempt Facilities, Indian River Power LLC Project, 5.38%, 10/01/45		2,430		2,481,662
				4,265,103
District of Columbia — 6.3%
District of Columbia, Refunding RB:
Georgetown University, 5.00%, 04/01/35		315		385,513
Georgetown University Issue, 5.00%, 04/01/42		260		313,206
The Catholic University of America Issue, 5.00%, 10/01/48		1,695		2,043,407
District of Columbia, Tax Allocation Bonds, City Market at O Street Project, 5.13%, 06/01/41		1,520		1,594,571
Metropolitan Washington Airports Authority, Refunding ARB:
Dulles Metrorail And Capital Improvement Projects, Series A, 5.00%, 10/01/53		1,475		1,575,330
Dulles Toll Road, CAB, 2nd Senior Lien, Series B (AGC), 0.00%, 10/01/35(c)		13,485		8,991,528
Metropolitan Washington Airports Authority Dulles Toll Road Revenue, Refunding RB, Subordinate, Dulles Metrorail And Capital Improvement Projects, Series B, 4.00%, 10/01/53		555		628,782
				15,532,337
Florida — 3.7%
County of Collier Florida Health Facilities Authority, Refunding RB, Series A, 5.00%, 05/01/45		960		1,103,856
County of Miami-Dade Florida Aviation, Refunding ARB, Miami International Airport, SeriesA-1, 5.38%, 10/01/20(b)		2,620		2,696,635

Security	Par (000)		Value
Florida (continued)
County of Volusia Educational Facility Authority, Refunding RB, Embry Riddle Aeronautical Project:
5.00%, 10/15/44	$	415	$	513,571
5.00%, 10/15/49		850		1,043,630
Mid-Bay Florida Bridge Authority, RB, Springing Lien, Series A, 7.25%, 10/01/21(b)		2,095		2,308,753
Village Community Development District No.10, Special Assessment Bonds, 5.13%, 05/01/43		1,380		1,475,510
				9,141,955
Georgia — 2.0%
County of Gainesville Georgia & Hall Hospital Authority, Refunding RB, Northeast Georgia Health System, Inc. Project, Series A (GTD), 5.50%, 08/15/54		370		436,848
Main Street Natural Gas, Inc., RB, Series A:
5.00%, 05/15/35		360		488,865
5.00%, 05/15/36		360		493,823
5.00%, 05/15/37		400		554,344
5.00%, 05/15/38		220		307,281
5.00%, 05/15/49		725		1,044,435
Municipal Electric Authority of Georgia, RB, Plant Vogtle Units 3 & 4 Project, 4.00%, 01/01/49		1,135		1,237,082
Municipal Electric Authority of Georgia, Refunding RB, Series A, 4.00%, 01/01/49		440		484,268
				5,046,946
Hawaii — 0.4%
State of Hawaii Harbor System, ARB, Series A, 5.25%, 07/01/30		945		961,934
Idaho — 0.3%
Idaho Health Facilities Authority, RB, Trinity Health Credit Group, Series A, 5.00%, 12/01/46		540		652,957
Illinois — 15.7%
Chicago Board of Education, GO, Series H, Series C, Series D:
Dedicated Revenues, 5.00%, 12/01/36		350		409,973
Project, 5.25%, 12/01/35		1,075		1,206,860

2

Schedule of Investments  (unaudited) (continued) January 31, 2020 BlackRock MuniHoldings Fund, Inc. (MHD) (Percentages shown are based on Net Assets)

Security	Par (000)		Value
Illinois (continued)
Chicago Board of Education, GO, Refunding:
Dedicated Revenues, 5.00%, 12/01/30	$	605	$	721,384
Dedicated Revenues, Series F, 5.00%, 12/01/22		455		495,550
Dedicated Revenues, Series G, 5.00%, 12/01/34		315		371,193
5.00%, 12/01/27		500		605,025
Chicago Board of Education, GO:
5.00%, 12/01/46		390		454,783
5.00%, 12/01/46		1,015		1,097,083
City of Chicago Illinois, Special Assessment Bonds, Lake Shore East Project, 6.75%, 12/01/32		867		868,968
City of Chicago Illinois O’Hare International Airport, GARB, 3rd Lien:
Series A, 5.75%, 01/01/21(b)		1,680		1,753,618
Series A, 5.75%, 01/01/39		320		332,848
Series C, 6.50%, 01/01/21(b)		4,055		4,260,142
City of Chicago Illinois Transit Authority, RB, Sales Tax Receipts, 5.25%, 12/01/40		730		777,129
City of Chicago Illinois Waterworks, Refunding RB, 2nd Lien Project, 5.00%, 11/01/42		1,000		1,082,600
County of Cook Illinois Community College District No. 508, GO, City College of Chicago, 5.50%, 12/01/38		560		626,612
Metropolitan Pier & Exposition Authority, Refunding RB:
McCormick Place Expansion Project, 4.00%, 06/15/50(d)		970		1,067,873
McCormick Place Expansion Project, 5.00%, 06/15/50(d)		630		754,595
McCormick Place Expansion Project, CAB, Series B (AGM), 0.00%, 06/15/47(c)		13,220		5,763,523
Mccormick Place Expansion Project, Series B (AGM), 0.00%, 06/15/43(c)		3,765		1,877,907
McCormick Place Expansion Project, Series B (AGM), 5.00%, 06/15/50		3,070		3,110,186
McCormick Place Expansion Project,Series B-2, 5.00%, 06/15/50		1,850		1,876,029
Railsplitter Tobacco Settlement Authority, RB, 6.00%, 06/01/21(b)		800		853,640
State of Illinois, GO, 5.00%, 02/01/39		1,100		1,214,488
State of Illinois, GO, Refunding, Series B, 5.00%, 10/01/29		930		1,136,534
State of Illinois, GO, Series A, 5.00%, 04/01/38		2,625		2,851,196

Security	Par (000)		Value
Illinois (continued)
State of Illinois Toll Highway Authority, RB, Series C, 5.00%, 01/01/37	$	2,000	$	2,333,360
University of Illinois, RB, Auxiliary Facilities System, Series A, 5.00%, 04/01/44		705		793,992
				38,697,091
Indiana — 3.0%
City of Valparaiso Indiana, RB, Exempt Facilities, Pratt Paper LLC Project, AMT:
6.75%, 01/01/34		560		651,717
7.00%, 01/01/44		1,355		1,578,954
Indiana Finance Authority, RB, Series A:
CWA Authority Project, 1st Lien, 5.25%, 10/01/38		2,275		2,424,058
Private Activity Bond, Ohio River Bridges East End Crossing Project, AMT, 5.00%, 07/01/44		310		340,777
Private Activity Bond, Ohio River Bridges East End Crossing Project, AMT, 5.00%, 07/01/48		1,030		1,130,899
Private Activity Bond, Ohio River Bridges East End Crossing Project, AMT, 5.25%, 01/01/51		290		320,813
Indianapolis Local Public Improvement Bond Bank, RB, Series A, 5.00%, 01/15/40		880		972,998
				7,420,216
Iowa — 1.5%
Iowa Finance Authority, Refunding RB, Iowa Fertilizer Co. Project:
Series B, 5.25%, 12/01/50(e)		1,955		2,165,476
Midwestern Disaster Area, 5.25%, 12/01/25		320		357,424
Midwestern Disaster Area, 5.88%, 12/01/26(a)		285		297,403
Iowa Tobacco Settlement Authority, Refunding RB, Asset-Backed, Series C, 5.63%, 06/01/46		980		990,231
				3,810,534
Kentucky — 0.7%
Kentucky Economic Development Finance Authority, RB, Catholic Health Initiatives, Series A, 5.25%, 01/01/23(b)		705		792,011

3

Schedule of Investments  (unaudited) (continued) January 31, 2020 BlackRock MuniHoldings Fund, Inc. (MHD) (Percentages shown are based on Net Assets)

Security	Par (000)		Value
Kentucky (continued)
Kentucky Public Transportation Infrastructure Authority, RB, Downtown Crossing Project, Convertible CAB, 1st Tier, Series C, 6.75%, 07/01/43(f)	$	865	$	985,477
				1,777,488
Louisiana — 1.4%
Tobacco Settlement Financing Corp., Refunding RB, Asset-Backed, Series A:
5.50%, 05/15/30		700		709,079
5.25%, 05/15/31		600		626,724
5.25%, 05/15/32		765		824,249
5.25%, 05/15/33		830		893,852
5.25%, 05/15/35		350		387,408
				3,441,312
Maryland — 1.0%
Maryland EDC, Refunding RB, CNX Marine Terminals, Inc., 5.75%, 09/01/25		530		541,098
Maryland Health & Higher Educational Facilities Authority, RB, Trinity Health Credit Group, Series 2017, 5.00%, 12/01/46		305		372,542
Maryland Health & Higher Educational Facilities Authority, Refunding RB, Charlestown Community Project, 6.25%, 01/01/21(b)		1,520		1,593,690
				2,507,330
Massachusetts — 1.8%
Collegiate Charter School of Lowell, RB:
5.00%, 06/15/49		675		727,549
5.00%, 06/15/54		285		305,372
Massachusetts Development Finance Agency, Refunding RB, Boston University, Series P, 5.45%, 05/15/59		1,165		1,538,324
Massachusetts Housing Finance Agency, RB, M/F Housing, SeriesC-1:
3.15%, 12/01/49		400		411,284
3.25%, 12/01/54		1,475		1,520,268
				4,502,797
Michigan — 3.1%
City of Detroit Michigan Sewage Disposal System, Refunding RB, Senior Lien, Series A, 5.25%, 07/01/39		3,085		3,372,614

Security	Par (000)		Value
Michigan (continued)
Kalamazoo Hospital Finance Authority, Refunding RB, Bronson Methodist Hospital:
5.50%, 05/15/20(b)	$	530	$	536,885
5.50%, 05/15/36		425		430,427
Michigan Finance Authority, Refunding RB:
Detroit Water & Sewage Department Project, Senior Lien, SeriesC-1, 5.00%, 07/01/44		630		682,492
Series A, 4.00%, 12/01/49		590		672,960
Michigan State University, Refunding RB, Board of Trustees, Series B, 5.00%, 02/15/48		730		912,084
Michigan Strategic Fund, RB,I-75 Improvement Projects, AMT, 5.00%, 06/30/48		785		944,543
				7,552,005
Minnesota — 1.1%
Duluth Economic Development Authority, Refunding RB, Essentia Health Obligated Group, Series A:
4.25%, 02/15/48		750		846,113
5.25%, 02/15/53		1,500		1,811,070
				2,657,183
Missouri — 0.2%
Bi-State Development Agency of the Missouri-Illinois Metropolitan District, Refunding RB, Combined Lien, Series A, 5.00%, 10/01/44		175		190,421
State of Missouri Health & Educational Facilities Authority, Refunding RB, St. Louis College of Pharmacy Project, 5.50%, 05/01/43		175		190,111
				380,532
Nebraska — 0.3%
Central Plains Nebraska Energy Project, RB, Gas Project No. 3, 5.25%, 09/01/37		575		630,838
New Hampshire — 0.7%
New Hampshire Business Finance Authority, Refunding RB, Resource Recovery, Covanta Project(a):
Series B, 4.63%, 11/01/42		1,105		1,148,824
Series C, AMT, 4.88%, 11/01/42		575		599,012
				1,747,836

4

Schedule of Investments  (unaudited) (continued) January 31, 2020 BlackRock MuniHoldings Fund, Inc. (MHD) (Percentages shown are based on Net Assets)

Security	Par (000)		Value
New Jersey — 13.8%
Casino Reinvestment Development Authority, Inc., Refunding RB:
5.25%, 11/01/39	$	735	$	800,900
5.25%, 11/01/44		1,095		1,189,028
County of Essex New Jersey Improvement Authority, RB, AMT, 5.25%, 07/01/45(a)		775		782,022
New Jersey EDA, ARB, Continental Airlines, Inc. Project, 5.13%, 09/15/23		1,410		1,518,993
New Jersey EDA, RB:
Continental Airlines, Inc. Project, AMT, 5.25%, 09/15/29		1,365		1,491,781
School Facilities Construction, 5.00%, 06/15/49		1,670		1,988,586
Series EEE, 5.00%, 06/15/48		2,705		3,176,671
Transit transportation Project, 4.00%, 11/01/38		370		414,467
Transit transportation Project, 4.00%, 11/01/39		295		329,609
New Jersey EDA, Refunding ARB, Port Network Container Terminal LLC Project, AMT, 5.00%, 10/01/47		1,060		1,226,166
New Jersey EDA, Refunding, Special Assessment Bonds, Kapkowski Road Landfill Project, 5.75%, 04/01/31		1,550		1,789,351
New Jersey State Turnpike Authority, RB:
Series A, 5.00%, 01/01/43		715		776,840
Series E, 5.00%, 01/01/45		1,875		2,190,675
New Jersey Transportation Trust Fund Authority, RB:
Series BB, 4.00%, 06/15/50		1,085		1,164,313
Series BB, 5.00%, 06/15/50		3,720		4,380,374
Transportation Program, Series AA, 5.00%, 06/15/44		315		350,343
Transportation Program, Series AA, 5.00%, 06/15/44		580		632,049
Transportation System, Series A, 5.50%, 06/15/21(b)		1,575		1,673,233
Transportation System, Series B, 5.25%, 06/15/36		1,705		1,785,681
Tobacco Settlement Financing Corp., Refunding RB, Series A, 5.25%, 06/01/46		390		463,815

Security	Par (000)		Value
New Jersey (continued)
Tobacco Settlement Financing Corp. New Jersey, Refunding RB,Sub-Series B, 5.00%, 06/01/46	$	5,150	$	5,920,079
				34,044,976
New York — 5.9%
City of New York Transitional Finance Authority Future Tax Secured Revenue, RB, Fiscal 2012,Sub-SeriesE-1, 5.00%, 02/01/42		310		333,324
Counties of New York Tobacco Trust IV, Refunding RB, Settlement Pass-Through Turbo, Series A, 6.25%, 06/01/41(a)		1,300		1,312,740
County of Westchester New York Healthcare Corp., RB, Senior Lien, Series A, 5.00%, 11/01/44		225		245,820
Erie Tobacco Asset Securitization Corp., Refunding RB, Asset-Backed, Series A, 5.00%, 06/01/45		1,405		1,405,815
Metropolitan Transportation Authority, RB, Series B, 5.25%, 11/15/38		1,715		1,984,427
New York City Water & Sewer System, RB, 2nd Generation Resolution, SeriesCC-1, 4.00%, 06/15/49		830		963,057
New York Counties Tobacco Trust IV, Refunding RB, Tobacco Settlement Pass-Through Bonds, Series A, 5.00%, 06/01/38		1,415		1,415,439
New York Liberty Development Corp., Refunding RB, 3 World Trade Center Project(a):
Class 1, 5.00%, 11/15/44		2,275		2,498,837
Class 2, 5.15%, 11/15/34		245		274,331
Class 2, 5.38%, 11/15/40		605		679,978
Port Authority of New York & New Jersey, ARB, Special Project, JFK International Air Terminal LLC Project, Series 8:
6.00%, 12/01/36		900		939,024
6.00%, 12/01/42		875		905,118
State of New York Environmental Facilities Corp., RB, Subordinated SRF Bonds, Series B, 5.00%, 06/15/48		1,305		1,626,278
				14,584,188
North Carolina — 0.4%
North Carolina Medical Care Commission, Refunding RB, 1st Mortgage, Retirement Facilities Whitestone Project, Series A, 7.75%, 03/01/21(b)		415		445,482

5

Schedule of Investments  (unaudited) (continued) January 31, 2020 BlackRock MuniHoldings Fund, Inc. (MHD) (Percentages shown are based on Net Assets)

Security	Par (000)		Value
North Carolina (continued)
University of North Carolina at Chapel Hill, RB, University of North Carolina Hospital at Chapel Hills, 5.00%, 02/01/49	$	390	$	595,573
				1,041,055
North Dakota — 0.3%
County of Cass North Dakota, Refunding RB, Essentia Health Obligated Group, Series B, 5.25%, 02/15/58		695		832,492
Ohio — 2.1%
Buckeye Tobacco Settlement Financing Authority, RB, Asset-Backed, Senior Turbo Term, SeriesA-2, 5.88%, 06/01/47		2,570		2,581,360
County of Franklin Ohio, RB:
Health Care Facilities Improvement, OPRS Communities Obligation Group, Series A, 6.13%, 07/01/40		470		515,496
Series A, 4.00%, 12/01/49		365		415,129
Trinity Health Credit Group, Series 2017, 5.00%, 12/01/46		290		348,020
Ohio Air Quality Development Authority, RB, AMG Vanadium Project, AMT, 5.00%, 07/01/49(a)		535		606,952
State of Ohio, RB, Portsmouth Bypass Project, AMT, 5.00%, 06/30/53		580		653,677
				5,120,634
Oklahoma — 1.7%
City of Oklahoma Turnpike Authority, RB, Series A, 4.00%, 01/01/48		1,500		1,666,965
Oklahoma Development Finance Authority, RB, OU Medicine Project, Series B, 5.25%, 08/15/48		855		1,029,685
Oklahoma Turnpike Authority, RB, 2nd Series C, 4.00%, 01/01/42		1,420		1,599,801
				4,296,451
Oregon — 0.3%
Warm Springs Reservation Confederated Tribe, Refunding RB, Green Bond, Pelton Round Butte Project, Series B, 5.00%, 11/01/39(a)		650		775,457
Pennsylvania — 3.8%
City of Philadelphia Pennsylvania Hospitals & Higher Education Facilities Authority, RB, Temple University Health System, Series A, 5.63%, 07/01/42		460		496,915

Security	Par (000)		Value
Pennsylvania (continued)
County of Montgomery Higher Education & Health Authority, Refunding RB, Thomas Jefferson University, Series A:
4.00%, 09/01/49	$	415	$	461,534
5.00%, 09/01/43		905		1,099,846
Lancaster IDA, RB, Willow Valley Communities Project, 5.00%, 12/01/49		950		1,113,381
Pennsylvania Economic Development Financing Authority, RB, AMT, 5.00%, 06/30/42		2,015		2,311,185
Pennsylvania Economic Development Financing Authority, Refunding RB, National Gypsum Co., AMT, 5.50%, 11/01/44		1,105		1,172,825
Pennsylvania Higher Educational Facilities Authority, RB, University of Pennsylvania Health System Obligation, 4.00%, 08/15/49		1,680		1,926,943
Pennsylvania Turnpike Commission, RB, Series A, 5.00%, 12/01/44		795		917,987
				9,500,616
Puerto Rico — 5.6%
Children’s Trust Fund, Refunding RB, Tobacco Settlement Asset-Backed Bonds:
5.50%, 05/15/39		475		483,027
5.63%, 05/15/43		500		508,445
Commonwealth of Puerto Rico Aqueduct & Sewer Authority, Refunding RB, Senior Lien, Series A, 6.00%, 07/01/44		960		979,728
Commonwealth of Puerto Rico Aqueduct & Sewer Authority, RB, Senior Lien, Series A:
5.00%, 07/01/33		1,845		1,962,674
5.13%, 07/01/37		510		543,798
Commonwealth of Puerto Rico Aqueduct & Sewer Authority, Refunding RB, Senior Lien, Series A, 6.00%, 07/01/38		530		540,886
Puerto Rico Sales Tax Financing Corp. Sales Tax Revenue, RB, Restructured:
SeriesA-1, 4.75%, 07/01/53		1,146		1,267,992
SeriesA-1, 5.00%, 07/01/58		4,631		5,201,169
SeriesA-2, 4.33%, 07/01/40		62		67,313
SeriesA-2, 4.78%, 07/01/58		2,162		2,390,826
				13,945,858

6

Schedule of Investments  (unaudited) (continued) January 31, 2020 BlackRock MuniHoldings Fund, Inc. (MHD) (Percentages shown are based on Net Assets)

Security	Par (000)		Value
Rhode Island — 2.2%
Tobacco Settlement Financing Corp., Refunding RB:
Series A, 5.00%, 06/01/35	$	580	$	660,922
Series B, 4.50%, 06/01/45		1,900		1,996,273
Series B, 5.00%, 06/01/50		2,605		2,808,711
				5,465,906
South Carolina — 4.6%
South Carolina Jobs EDA, Refunding RB, Prisma Health Obligated Group, Series A, 5.00%, 05/01/48		2,245		2,663,131
State of South Carolina Ports Authority, ARB(b):
5.25%, 07/01/20		2,285		2,325,650
AMT, 5.25%, 07/01/25		765		929,391
State of South Carolina Public Service Authority, RB, Santee Cooper, Series A, 5.50%, 12/01/54		2,410		2,734,868
State of South Carolina Public Service Authority, Refunding RB:
Series A, 5.00%, 12/01/50		1,035		1,179,528
Series E, 5.25%, 12/01/55		1,225		1,419,493
				11,252,061
Tennessee — 1.1%
City of Chattanooga Health Educational & Housing Facility Board, RB, Catholic Health Initiatives, Series A, 5.25%, 01/01/23(b)		980		1,100,168
City of Chattanooga Health Educational & Housing Facility Board, Refunding RB, Commonspirit Health, Series A, 4.00%, 08/01/44		115		128,127
County of Nashville & Davidson Metropolitan Government Health & Educational Facilities Board, RB, Vanderbilt University Medical Center, Series A, 5.00%, 07/01/40		495		588,515

Security	Par (000)		Value
Tennessee (continued)
County of Nashville & Davidson Metropolitan Government Health & Educational Facilities Board, Refunding RB, Lipscomb University Project, Series A, 5.25%, 10/01/58	$	705	$	854,580
				2,671,390
Texas — 6.3%
Central Texas Regional Mobility Authority, Refunding RB:
Senior Lien, 6.25%, 01/01/21(b)		1,480		1,551,247
Sub-Lien, 5.00%, 01/01/33		250		275,965
City of Austin Texas Airport System, ARB, AMT, 5.00%, 11/15/39		440		506,194
City of Austin Texas Electric Utility Revenue, Refunding RB, Series A, 5.00%, 11/15/37		1,500		1,652,145
City of San Antonio Texas Electric & Gas Systems Revenue, Refunding RB, Series A, 5.00%, 02/01/48		850		1,061,259
County of Harris Texas Cultural Education Facilities Finance Corp., RB, 1st Mortgage, Brazos Presbyterian Homes, Inc. Project, Series B, 7.00%, 01/01/23(b)		325		381,963
County of Tarrant Texas Cultural Education Facilities Finance Corp., RB, Christus Health, Series B, 5.00%, 07/01/48		3,330		4,030,099
North Texas Tollway Authority, RB, CAB, Special Project System, Series B, 0.00%, 09/01/31(b)(c)		1,400		730,114
San Antonio Water System, Refunding RB, Junior Lien, Series A, 5.00%, 05/15/48		1,825		2,243,691
Texas Private Activity Bond Surface Transportation Corp., RB, Senior Lien, LBJ Infrastructure Group LLC, 7.00%, 06/30/40		2,000		2,050,180
Texas Transportation Commission, RB, First Tier Toll Revenue, 5.00%, 08/01/57		845		991,743
				15,474,600

7

Schedule of Investments  (unaudited) (continued) January 31, 2020 BlackRock MuniHoldings Fund, Inc. (MHD) (Percentages shown are based on Net Assets)

Security	Par (000)		Value
Utah — 0.6%
City of Salt Lake Corp. Airport Revenue, ARB, Series A, AMT:
5.00%, 07/01/48	$	640	$	772,352
5.00%, 07/01/47		665		792,806
				1,565,158
Virginia — 1.7%
County of Hanover Virginia EDA, Refunding RB, Covenant Woods, Series A:
5.00%, 07/01/42		625		652,362
Residential Care Facility, 5.00%, 07/01/47		970		1,009,343
Virginia Small Business Financing Authority, RB, Senior Lien, Elizabeth River Crossings OpCo LLC Project, AMT:
5.25%, 01/01/32		550		599,220
6.00%, 01/01/37		1,830		2,023,010
				4,283,935
Washington — 2.4%
Grant County Public Utility District No. 2, Refunding RB, Series A, 5.00%, 01/01/43		1,555		1,844,074
Port of Seattle Washington, ARB, Series A, AMT, 5.00%, 05/01/43		1,085		1,294,763
Port of Seattle Washington, RB, Intermediate Lien, Series C, AMT, 5.00%, 04/01/40		540		618,019
Washington Health Care Facilities Authority, RB, Catholic Health Initiatives, Series A, 5.75%, 01/01/45		1,625		1,831,180
Washington Health Care Facilities Authority, Refunding RB, Commonspirit Health, Series A, 4.00%, 08/01/44		250		278,538
				5,866,574
Wisconsin — 0.4%
Public Finance Authority, RB:
A&T Real Estate Foundation, Series B, 5.00%, 06/01/49		320		370,947
American Preparatory Academy - Las Vegas Project, Series A, 5.00%, 07/15/39(a)		100		111,384
American Preparatory Academy - Las Vegas Project, Series A, 5.00%, 07/15/49(a)		245		268,121

Security	Par (000)		Value
Wisconsin (continued)
American Preparatory Academy - Las Vegas Project, Series A, 5.00%, 07/15/54(a)	$	115	$	125,377
				875,829
Total Municipal Bonds — 115.2% (Cost — $252,239,363)				284,552,632
Municipal Bonds Transferred to Tender Option Bond Trusts(g) — 37.8%
California — 3.8%
Bay Area Toll Authority, Refunding RB, San Francisco Bay Area Toll Bridge, 4.00%, 04/01/42(h)		2,257		2,549,143
City of Los Angeles California Department of Airports, Refunding ARB, Los Angeles International Airport, Senior Series A, 5.00%, 05/15/40		4,121		4,167,098
Sacramento Area Flood Control Agency, Refunding, Consolidated Capital Assessment District No. 2 Bonds, 5.00%, 10/01/47		2,250		2,717,594
				9,433,835
Colorado — 2.0%
City & County of Denver Colorado Airport System Revenue, Refunding ARB, Subordinate System, Series A, AMT, 5.25%, 12/01/48(h)		1,664		2,056,575
County of Adams Colorado, COP, Refunding, 4.00%, 12/01/45		2,700		2,980,368
				5,036,943
Florida — 1.6%
County of Miami-Dade Florida, RB, Water & Sewer System, 5.00%, 10/01/20(b)		3,939		4,045,234
Georgia — 1.6%
County of Dalton Whitfield Joint Development Authority, RB, Hamilton Health Care System Obligation, 4.00%, 08/15/48		2,622		2,883,977

8

Schedule of Investments  (unaudited) (continued) January 31, 2020 BlackRock MuniHoldings Fund, Inc. (MHD) (Percentages shown are based on Net Assets)

Security	Par (000)		Value
Georgia (continued)
Georgia Housing & Finance Authority, Refunding RB, S/F Mortgage Bonds, Series A, 3.60%, 12/01/44	$	1,042	$	1,111,401
				3,995,378
Illinois — 0.5%
Illinois Finance Authority, Refunding RB, Presence Health Network, Series C:
4.00%, 02/15/27(b)		3		2,866
4.00%, 02/15/41		1,031		1,142,417
				1,145,283
Massachusetts — 4.2%
Commonwealth of Massachusetts Transportation Fund Revenue, RB, Rail Enhancement Program, Series A, 4.00%, 06/01/45		1,502		1,668,227
Massachusetts Development Finance Agency, Refunding RB, Partners Healthcare System, 5.00%, 07/01/47		3,359		3,977,805
Massachusetts School Building Authority, RB, Senior, Series B, 5.00%, 10/15/21(b)		4,502		4,817,949
				10,463,981
New York — 11.8%
Hudson Yards Infrastructure Corp., RB, Senior-Fiscal 2012(h):
5.75%, 02/15/21(b)		687		720,304
5.75%, 02/15/47		423		443,109
New York Liberty Development Corp., ARB, 1 World Trade Center Port Authority Consolidated Bonds, 5.25%, 12/15/43		7,440		8,037,058
New York Liberty Development Corp., Refunding RB, 4 World Trade Center Project, 5.75%, 11/15/51(h)		4,460		4,823,263
New York State Dormitory Authority, Refunding RB, Series D, 4.00%, 02/15/47		4,317		5,007,396
New York State Thruway Authority, Refunding RB, Subordinate, Series B, 4.00%, 01/01/50		2,083		2,381,076
Port Authority of New York & New Jersey, Refunding ARB, Series194th, 5.25%, 10/15/55		1,860		2,244,518

Security	Par (000)		Value
New York (continued)
State of New York Urban Development Corp., RB, State Personal Income Tax, General Purpose, Series A, 4.00%, 03/15/46	$	4,846	$	5,557,249
				29,213,973
North Carolina — 0.9%
North Carolina Capital Facilities Finance Agency, Refunding RB, Duke University Project, Series B, 5.00%, 10/01/55		1,830		2,179,292
Pennsylvania — 0.8%
Pennsylvania Turnpike Commission, RB,Sub-Series A, 5.50%, 12/01/42		1,695		2,079,273
Rhode Island — 0.5%
Narragansett Bay Commission, Refunding RB, Wastewater System, Series A, 4.00%, 09/01/43		1,140		1,204,045
Texas — 6.7%
City of San Antonio Texas Electric and Gas Systems, RB, Junior Lien, 5.00%, 02/01/43		1,720		1,911,669
County of Harris Texas Metropolitan Transit Authority, Refunding RB, Series A, 5.00%, 11/01/41		2,350		2,502,914
Lower Colorado River Authority, Refunding RB, LCRA Transmission Services Corporation Project, 4.00%, 05/15/43		1,504		1,574,895
San Antonio Public Facilities Corp., Refunding RB, Convention Center Refinancing And Expansion Project, 4.00%, 09/15/42		2,295		2,407,065
Texas Water Development Board, RB, State Water Implementation Fund, Series A, 4.00%, 10/15/49		5,020		5,809,295

9

Schedule of Investments  (unaudited) (continued) January 31, 2020 BlackRock MuniHoldings Fund, Inc. (MHD) (Percentages shown are based on Net Assets)

Security	Par (000)		Value
Texas (continued)
University of Texas, Refunding RB, Financing System, Series B, 5.00%, 08/15/43	$	2,041	$	2,229,212
				16,435,050
Virginia — 0.9%
Virginia Small Business Financing Authority, Refunding RB, Sentara Healthcare, 5.00%, 11/01/40		2,095		2,115,247
Washington — 0.6%
Metropolitan Washington Airports Authority Dulles Toll Road Revenue, Refunding RB, Subordinate, Dulles Metrorail And Capital Improvement Projects, Series B (AGM), 4.00%, 10/01/53		1,299		1,469,359
Wisconsin — 1.9%
State of Wisconsin Health & Educational Facilities Authority, Refunding RB, The Medical College of Wisconsin, Inc., 4.00%, 12/01/46		2,059		2,254,201

Security	Par (000)		Value
Wisconsin (continued)
Wisconsin Health & Educational Facilities Authority, Refunding RB, 4.00%, 12/15/49(h)	$	2,140	$	2,398,191
				4,652,392
Total Municipal Bonds Transferred to Tender Option Bond Trusts — 37.8% (Cost — $87,932,277)				93,469,285
Total Long-Term Investments — 153.0% (Cost — $340,171,640)				378,021,917
	Shares
Short-Term Securities — 3.1%
BlackRock Liquidity Funds, MuniCash, Institutional Class, 0.81%(i)(j)		7,577,780		7,579,296
Total Short-Term Securities — 3.1% (Cost — $7,579,052)				7,579,296
Total Investments — 156.1% (Cost — $347,750,692)				385,601,213
Other Assets Less Liabilities — 0.1%				341,106
Liability for TOB Trust Certificates, Including Interest Expense and Fees Payable — (22.3)%				(55,176,648	)
VMTP Shares at Liquidation Value — (33.9)%				(83,700,000	)
Net Assets Applicable to Common Shares — 100.0%			$	247,065,671

^(a)  Security exempt from registration pursuant to Rule 144A under the Securities Act of 1933, as amended. These securities may be resold in transactions exempt from registration to qualified institutional investors.

^(b)  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.

^(c)  Zero-coupon bond.

^(d)  When-issued security.

^(e)  Variable or floating rate security, which interest rate adjusts periodically based on changes in current interest rates and prepayments on the underlying pool of assets. Rate shown is the rate in effect as of period end.

^(f)  Step-up bond that pays an initial coupon rate for the first period and then a higher coupon rate for the following periods. Rate as of period end.

^(g)  Represent bonds transferred to a TOB Trust in exchange of cash and residual certificates received by the Fund. These bonds serve as collateral in a secured borrowing.

^(h)  All or a portion of the security is subject to a recourse agreement. The aggregate maximum potential amount the Fund could ultimately be required to pay under the agreements, which expire on August 15, 2020 to December 15, 2027, is $7,489,785

⁽ⁱ⁾  Annualized7-day yield as of period end.

10

Schedule of Investments  (unaudited) (continued) January 31, 2020 BlackRock MuniHoldings Fund, Inc. (MHD)

^(j)  During the period ended January 31, 2020, investments in issuers considered to be an affiliate/affiliates of the Fund for purposes of Section 2(a)(3) of the Investment Company Act of 1940, as amended, were as follows:

Affiliate	Shares Held at 04/30/19		Net Activity		Shares Held at 01/31/20		Value at 01/31/20		Income		Net Realized Gain (Loss) (a)			Change in Unrealized Appreciation (Depreciation)
BlackRock Liquidity Funds, MuniCash, Institutional Class		6,880,499		697,281		7,577,780	$	7,579,296	$	85,053	$	(333	)	$	929

^(a)  Includes net capital gain distributions, if applicable.

Portfolio Abbreviations
AGC	Assured Guarantee Corp.
AGM	Assured Guaranty Municipal Corp.
AMT	Alternative Minimum Tax (subject to)
ARB	Airport Revenue Bonds
CAB	Capital Appreciation Bonds
COP	Certificates of Participation
EDA	Economic Development Authority
EDC	Economic Development Corp.
GARB	General Airport Revenue Bonds
GO	General Obligation Bonds
GTD	Guaranteed
IDA	Industrial Development Authority
LRB	Lease Revenue Bonds
M/F	Multi-Family
NPFGC	National Public Finance Guarantee Corp.
RB	Revenue Bonds
S/F	Single-Family
SRF	State Revolving Fund

Derivative Financial Instruments Outstanding as of Period End

Futures Contracts

Description	Number of Contracts		Expiration Date		Notional Amount (000)		Value/ Unrealized Appreciation (Depreciation)
Short Contracts
10-Year U.S. Treasury Note		12		03/20/20	$	1,580	$	(25,260	)
Long U.S. Treasury Bond		95		03/20/20		15,535		(370,126	)
5-Year U.S. Treasury Note		9		03/31/20		1,083		(10,816	)
							$	(406,202	)

11

Schedule of Investments  (unaudited) (continued) January 31, 2020 BlackRock MuniHoldings Fund, Inc. (MHD)

Fair Value Hierarchy as of Period End

Various inputs are used in determining the fair value of investments and derivative financial instruments. These inputs to valuation techniques are categorized into a fair value hierarchy consisting of three broad levels for financial reporting purposes as follows:

• Level 1 — Unadjusted price quotations in active markets/exchanges for identical assets or liabilities that the Fund has the ability to access

• 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)

• Level 3 — Unobservable inputs based on the best information available in the circumstances, to the extent observable inputs are not available (including the BlackRock Global Valuation Methodologies Committee’s (the “Global Valuation Committee’s”) assumptions used in determining the fair value of investments and derivative financial instruments)

The hierarchy gives the highest priority to unadjusted quoted prices in active markets for identical assets or liabilities (Level 1 measurements) and the lowest priority to unobservable inputs (Level 3 measurements). Accordingly, the degree of judgment exercised in determining fair value is greatest for instruments categorized in Level 3. The inputs used to measure fair value may fall into different levels of the fair value hierarchy. In such cases, for disclosure purposes, the fair value hierarchy classification is determined based on the lowest level input that is significant to the fair value measurement in its entirety. Investments classified within Level 3 have significant unobservable inputs used by the Global Valuation Committee in determining the price for Fair Valued Investments. Level 3 investments include equity or debt issued by privately held companies or funds. There may not be a secondary market, and/or there are a limited number of investors. The categorization of a value determined for investments and derivative financial instruments is based on the pricing transparency of the investments and derivative financial instruments and is not necessarily an indication of the risks associated with investing in those securities. For information about the Fund’s policy regarding valuation of investments and derivative financial instruments, refer to the Fund’s most recent financial statements as contained in its semi-annual report.

The following tables summarize the Fund’s investments and derivative financial instruments categorized in the disclosure hierarchy:

	Level 1			Level 2		Level 3		Total
Assets:
Investments:
Long-Term Investments(a)	$	—		$	378,021,917	$	—	$	378,021,917
Short-Term Securities		7,579,296			—		—		7,579,296
	$	7,579,296		$	378,021,917	$	—	$	385,601,213
Derivative Financial Instruments(b)
Liabilities:
Interest Rate Contracts	$	(406,202	)	$	—	$	—	$	(406,202	)

^(a)  See above Schedule of Investments for values in each state or political subdivision.

^(b)  Derivative financial instruments are futures contracts. Futures contracts are valued at the unrealized appreciation (depreciation) on the instrument.

The Fund may hold assets and/or liabilities in which the fair value approximates the carrying amount for financial reporting purposes. As of period end, such assets and/or liabilities are categorized within the disclosure hierarchy as follows:

	Level 1		Level 2			Level 3		Total
Liabilities:
TOB Trust Certificates	$	—	$	(55,035,418	)	$	—	$	(55,035,418	)
VMTP Shares at Liquidation Value		—		(83,700,000	)		—		(83,700,000	)
	$	—	$	(138,735,418	)	$	—	$	(138,735,418	)

12