Pioneer Municipal High Income Opportunities Fund, Inc.
Schedule of Investments  |  January 31, 2025 
 
Ticker Symbol: MIO

Schedule of Investments  |  1/31/25
(unaudited) 
Principal
Amount
USD ($)
          Value
  UNAFFILIATED ISSUERS — 110.7%  
  Municipal Bonds — 110.7% of Net Assets(a)  
  Alabama — 1.1%  
1,100,000 Mobile County Industrial Development Authority, Calvert LLC Project, Series A, 5.00%, 6/1/54 $  1,109,801
1,300,000 Mobile County Industrial Development Authority, Calvert LLC Project, Series B, 4.75%, 12/1/54   1,270,386
  Total Alabama   $2,380,187
  Arizona — 3.1%  
1,675,000 Arizona Industrial Development Authority, Doral Academy Nevada Fire Mesa, Series A, 5.00%, 7/15/49 $  1,646,408
1,000,000 Arizona Industrial Development Authority, Doral Academy Of Northern Nevada Project, Series A, 4.00%, 7/15/51 (144A)      831,160
950,000 Arizona Industrial Development Authority, Doral Academy Of Northern Nevada Project, Series A, 4.00%, 7/15/56 (144A)      758,869
4,000,000 Maricopa County Industrial Development Authority, Commercial Metals Company, 4.00%, 10/15/47 (144A)   3,494,280
  Total Arizona   $6,730,717
  Arkansas — 5.1%  
9,500,000 Arkansas Development Finance Authority, Big River Steel Project, 4.50%, 9/1/49 (144A) $  9,317,030
1,750,000 Arkansas Development Finance Authority, Green Bond, 5.45%, 9/1/52   1,804,268
  Total Arkansas  $11,121,298
  California — 3.3%  
1,900,000(b) California Infrastructure & Economic Development Bank, Brightline West Passenger Rail Project, Series A-4, 8.00%, 1/1/50 (144A) $  1,959,014
750,000 California Municipal Finance Authority, Westside Neighborhood School Project, 6.375%, 6/15/64 (144A)      811,823
300,000 California School Finance Authority, Envision Education – Obligated Group, Series A, 5.00%, 6/1/54 (144A)      305,142
250,000 California School Finance Authority, Fortune School of Education Obligated Group, Series A, 5.00%, 6/1/54 (144A)      240,205
700,000 California School Finance Authority, Fortune School of Education Obligated Group, Series A, 5.125%, 6/1/59 (144A)      671,328
1Pioneer Municipal High Income Opportunities Fund, Inc. | 1/31/25

Principal
Amount
USD ($)
          Value
  California — (continued)  
2,315,000 California Statewide Communities Development Authority, Loma Linda University Medical Center, Series A, 5.25%, 12/1/56 (144A) $  2,327,570
740,000 Chino Community Facilities District, Series 3, 5.00%, 9/1/54     771,376
  Total California   $7,086,458
  Colorado — 9.2%  
5,180,000 Aerotropolis Regional Transportation Authority, 4.25%, 12/1/41 $  4,747,677
3,500,000 Aerotropolis Regional Transportation Authority, 4.375%, 12/1/52   3,080,910
2,575,000 Aerotropolis Regional Transportation Authority, 5.00%, 12/1/51   2,463,760
700,000 Aerotropolis Regional Transportation Authority, 5.75%, 12/1/54 (144A)      711,004
3,000,000 Colorado High Performance Transportation Enterprise, 5.00%, 12/31/56   2,963,610
2,000,000 Dominion Water & Sanitation District, 5.875%, 12/1/52   2,013,540
3,475,000 Prairie Center Metropolitan District No 3, Series A, 5.00%, 12/15/41 (144A)   3,460,370
500,000 Sterling Ranch Community Authority Board, Douglas County, Series A, 5.75%, 12/1/54 (144A)     499,850
  Total Colorado  $19,940,721
  Delaware — 0.4%  
1,015,000 Delaware State Economic Development Authority, Aspira of Delaware Charter, 4.00%, 6/1/57 $    814,121
  Total Delaware     $814,121
  District of Columbia — 0.2%  
500,000 District of Columbia, Union Market Project, Series A, 5.125%, 6/1/34 (144A) $    500,935
  Total District of Columbia     $500,935
  Florida — 6.3%  
1,200,000 Capital Projects Finance Authority, PRG - Unionwest Properties LLC Project, Series A-1, 5.25%, 6/1/39 (144A) $  1,252,812
1,335,000 Capital Trust Authority, Imagine School at West Pasco Project, Series A, 5.50%, 12/15/33 (144A)   1,302,266
1,320,000 Capital Trust Authority, Imagine School at West Pasco Project, Series A, 6.50%, 12/15/53 (144A)   1,330,177
Pioneer Municipal High Income Opportunities Fund, Inc. | 1/31/252

Schedule of Investments  |  1/31/25
(unaudited) (continued)
Principal
Amount
USD ($)
          Value
  Florida — (continued)  
650,000 Capital Trust Authority, Mason Classical Academy Project, Series A, 5.00%, 6/1/64 (144A) $    628,400
2,000,000 Florida Development Finance Corp., Brightline Florida Passenger Rail Project, 5.50%, 7/1/53   2,029,060
1,000,000(b) Florida Development Finance Corp., Brightline Florida Passenger Rail Project, 12.00%, 7/15/32 (144A)   1,069,720
4,425,000 Florida Development Finance Corp., Glenridge On Palmer Ranch Project, 5.00%, 6/1/51 (144A)   4,227,291
400,000 Florida Development Finance Corp., The Henry Project, Series A-1, 5.25%, 6/1/54 (144A)      404,492
900,000 Florida Development Finance Corp., The Henry Project, Series B, 6.50%, 6/1/59 (144A)      914,985
525,000 Miami-Dade County Industrial Development Authority, Academir Charter Schools, Inc., Project, Series A, 5.25%, 7/1/52 (144A)     525,898
  Total Florida  $13,685,101
  Illinois — 5.0%  
2,260,000(c) Chicago Board of Education, Series A, 5.00%, 12/1/42 $  2,237,513
9,500,000 Metropolitan Pier & Exposition Authority, McCormick Place Expansion, 4.00%, 6/15/50   8,494,995
  Total Illinois  $10,732,508
  Indiana — 1.7%  
1,250,000 City of Valparaiso, Pratt Paper LLC Project, 5.00%, 1/1/54 (144A) $  1,258,275
2,500,000 Indiana Finance Authority, Multipurpose Educational Facilities, Avondale Meadows Academy Project, 5.375%, 7/1/47   2,505,675
  Total Indiana   $3,763,950
  Iowa — 3.0%  
6,600,000 Iowa Finance Authority, Alcoa Inc. Projects, 4.75%, 8/1/42 $  6,604,224
  Total Iowa   $6,604,224
  Massachusetts — 0.3%  
330,000 Massachusetts Development Finance Agency, Gingercare Living Issue, Series A, 5.50%, 12/1/44 (144A) $    329,314
390,000 Massachusetts Development Finance Agency, Gingercare Living Issue, Series A, 5.875%, 12/1/60 (144A)     375,882
  Total Massachusetts     $705,196
3Pioneer Municipal High Income Opportunities Fund, Inc. | 1/31/25

Principal
Amount
USD ($)
          Value
  Minnesota — 0.9%  
600,000 City of Brooklyn Park, Prairie Seeds Academy Project, 5.25%, 6/15/64 $    576,372
1,430,000 City of Rochester, Rochester Math & Science Academy, Series A, 5.125%, 9/1/38   1,313,727
  Total Minnesota   $1,890,099
  New Jersey — 0.8%  
1,745,000 Tobacco Settlement Financing Corp., Series B, 5.00%, 6/1/46 $  1,750,165
  Total New Jersey   $1,750,165
  New York — 26.3%  
5,300,000 Chautauqua Tobacco Asset Securitization Corp., 5.00%, 6/1/48 $  5,300,265
1,000,000 Dutchess County Local Development Corp., Health Quest Systems Inc., Series B, 5.00%, 7/1/46   1,005,780
5,885,000 Erie Tobacco Asset Securitization Corp., Asset-Backed, Series A, 5.00%, 6/1/45   5,547,554
3,505,000 Nassau County Tobacco Settlement Corp., Asset-Backed, Series A-3, 5.00%, 6/1/35   3,331,923
2,895,000 Nassau County Tobacco Settlement Corp., Asset-Backed, Series A-3, 5.125%, 6/1/46   2,644,322
1,730,000 New York Counties Tobacco Trust IV, Settlement Pass-Through, Series A, 5.00%, 6/1/42   1,671,111
7,915,000 New York Counties Tobacco Trust IV, Settlement Pass-Through, Series A, 5.00%, 6/1/45   7,508,090
5,000,000 New York Transportation Development Corp., Series A, 5.25%, 1/1/50   5,000,750
3,000,000 New York Transportation Development Corp., Green Bond, 5.375%, 6/30/60   3,089,490
500,000 New York Transportation Development Corp., JFK Airport Terminal 6 Redevelopment Project, Series A, 5.50%, 12/31/60      528,075
1,880,000 New York Transportation Development Corp., John F. Kennedy International Airport New Terminal One Project, 5.50%, 6/30/60   1,971,631
900,000 Suffolk Regional Off-Track Betting Co., 6.00%, 12/1/53      933,579
5,715,000 TSASC, Inc., Series B, 5.00%, 6/1/48   5,337,239
Pioneer Municipal High Income Opportunities Fund, Inc. | 1/31/254

Schedule of Investments  |  1/31/25
(unaudited) (continued)
Principal
Amount
USD ($)
          Value
  New York — (continued)  
5,775,000 Westchester County Local Development Corp., Purchase Senior Learning Community, 5.00%, 7/1/56 (144A) $  5,726,374
8,000,000 Westchester County Local Development Corp., Purchase Senior Learning Community, Inc. Project, 4.50%, 7/1/56 (144A)   7,310,640
  Total New York  $56,906,823
  North Carolina — 0.2%  
180,000 North Carolina Medical Care Commission, Penick Village Project, Series A, 5.50%, 9/1/44 $    185,573
215,000 North Carolina Medical Care Commission, Penick Village Project, Series A, 5.50%, 9/1/54     216,907
  Total North Carolina     $402,480
  Ohio — 5.4%  
13,000,000 Buckeye Tobacco Settlement Financing Authority, Senior Class 2, Series B-2, 5.00%, 6/1/55 $ 11,692,720
  Total Ohio  $11,692,720
  Oklahoma — 2.7%  
5,900,000 Tulsa Airports Improvement Trust, Series C, 5.50%, 12/1/35 $  5,902,360
  Total Oklahoma   $5,902,360
  Pennsylvania — 3.3%  
600,000 Allentown Commercial and Industrial Development Authority, 5.75%, 6/15/43 $    615,294
1,600,000 Allentown Commercial and Industrial Development Authority, 6.00%, 6/15/53   1,625,792
730,000 Allentown Neighborhood Improvement Zone Development Authority, City Center Project, 5.00%, 5/1/42 (144A)      742,439
1,100,000 Allentown Neighborhood Improvement Zone Development Authority, Waterfront - 30 E. Allen Street Project, Series B, 6.00%, 5/1/42 (144A)   1,156,595
750,000 Philadelphia Authority for Industrial Development, 4.00%, 6/1/41      670,305
2,500,000(b) Philadelphia Authority for Industrial Development, 5.125%, 12/15/44 (144A)   2,376,075
  Total Pennsylvania   $7,186,500
  Puerto Rico — 14.6%  
2,402,857(b) Commonwealth of Puerto Rico, 11/1/43 $  1,489,243
5,000,000(b) Commonwealth of Puerto Rico, 11/1/51   1,550,000
5Pioneer Municipal High Income Opportunities Fund, Inc. | 1/31/25

Principal
Amount
USD ($)
          Value
  Puerto Rico — (continued)  
7,673,960(c) Commonwealth of Puerto Rico, Restructured Series A-1, 4.00%, 7/1/37 $  7,514,725
1,796,000(c) Commonwealth of Puerto Rico, Restructured Series A-1, 4.00%, 7/1/41   1,722,723
3,624,000(c) Commonwealth of Puerto Rico, Restructured Series A-1, 4.00%, 7/1/46   3,243,480
5,760,645 GDB Debt Recovery Authority of Puerto Rico, 7.50%, 8/20/40   5,616,629
2,500,000 Puerto Rico Commonwealth Aqueduct & Sewer Authority, Series A, 5.00%, 7/1/47 (144A)   2,520,700
1,300,000(b) Puerto Rico Industrial Development Co., 7.00%, 1/1/54   1,233,336
6,844,000 Puerto Rico Sales Tax Financing Corp. Sales Tax Revenue, Series A-1, 4.75%, 7/1/53   6,698,565
  Total Puerto Rico  $31,589,401
  Texas — 2.9%  
400,000 Arlington Higher Education Finance Corp., BASIS Texas Charter Schools, Inc., 4.875%, 6/15/59 (144A) $    391,992
300,000 Arlington Higher Education Finance Corp., Great Hearts America, Series A, 5.00%, 8/15/54      290,922
3,000,000 City of Houston Airport System Revenue, 4.00%, 7/15/41   2,775,960
2,200,000 Greater Texas Cultural Education Facilities Finance Corp., Texas Biomedical Research Institute Project, Series A, 5.25%, 6/1/54   2,305,644
450,000 Port of Beaumont Navigation District, Jefferson Gulf Coast Energy Project, Series A, 5.125%, 1/1/44 (144A)     456,809
  Total Texas   $6,221,327
  Utah — 1.0%  
800,000(c) Grapevine Wash Local District, Series A-1, 6.00%, 3/1/55 (144A) $    761,984
500,000 MIDA Mountain Veterans Program Public Infrastructure District, 5.00%, 6/1/44 (144A)      502,080
400,000 MIDA Mountain Village Public Infrastructure District, Series 1, 5.125%, 6/15/54 (144A)      391,260
500,000 MIDA Mountain Village Public Infrastructure District, Series 2, 6.00%, 6/15/54 (144A)     520,560
  Total Utah   $2,175,884
Pioneer Municipal High Income Opportunities Fund, Inc. | 1/31/256

Schedule of Investments  |  1/31/25
(unaudited) (continued)
Principal
Amount
USD ($)
          Value
  Virginia — 3.8%  
9,440,000 Tobacco Settlement Financing Corp., Series A-1, 6.706%, 6/1/46 $  8,165,600
  Total Virginia   $8,165,600
  West Virginia — 5.3%  
15,000,000 Tobacco Settlement Finance Authority, Series A, 4.306%, 6/1/49 $ 11,399,100
  Total West Virginia  $11,399,100
  Wisconsin — 4.8%  
1,800,000 Public Finance Authority, Series A, 5.75%, 7/1/54 $  1,909,224
250,000 Public Finance Authority, Cincinnati Classical Academy, Series A, 5.875%, 6/15/54 (144A)      250,088
1,115,000 Public Finance Authority, Coral Academy Science Reno, 5.00%, 6/1/39 (144A)   1,092,332
8,000,000 Public Finance Authority, SearStone CCRC Project, 4.00%, 6/1/41 (144A)   7,138,000
  Total Wisconsin  $10,389,644
  Total Municipal Bonds
(Cost $228,039,908)
$239,737,519
  TOTAL INVESTMENTS IN UNAFFILIATED ISSUERS — 110.7%
(Cost $228,039,908)
$239,737,519
  OTHER ASSETS AND LIABILITIES — (10.7)% $(23,156,442)
  net assets — 100.0% $216,581,077
             
(144A) The resale of such security is exempt from registration under Rule 144A of the Securities Act of 1933. Such securities may be resold normally to qualified institutional buyers. At January 31, 2025, the value of these securities amounted to $70,846,020, or 32.7% of net assets.
(a) Consists of Revenue Bonds unless otherwise indicated.
(b) The interest rate is subject to change periodically. The interest rate and/or reference index and spread shown at January 31, 2025.
(c) Represents a General Obligation Bond.
7Pioneer Municipal High Income Opportunities Fund, Inc. | 1/31/25

FUTURES CONTRACTS
FIXED INCOME INDEX FUTURES CONTRACTS
Number of
Contracts
Long
Description Expiration
Date
Notional
Amount
Market
Value
Unrealized
(Depreciation)
38 U.S. Ultra Bond (CBT) 3/20/25 $4,665,197 $4,501,812 $(163,385)
TOTAL FUTURES CONTRACTS $4,665,197 $4,501,812 $(163,385)
CBT Chicago Board of Trade.
Various inputs are used in determining the value of the Fund’s investments. These inputs are summarized in the three broad levels below.
Level 1 unadjusted quoted prices in active markets for identical securities.
Level 2 other significant observable inputs (including quoted prices for similar securities, interest rates, prepayment speeds, credit risks, etc.).
Level 3 significant unobservable inputs (including the Adviser’s own assumptions in determining fair value of investments).
The following is a summary of the inputs used as of January 31, 2025 in valuing the Fund’s investments:
  Level 1 Level 2 Level 3 Total
Municipal Bonds $$239,737,519 $— $239,737,519
Total Investments in Securities $$239,737,519 $$239,737,519
Other Financial Instruments        
Net unrealized depreciation on futures contracts $(163,385) $$— $(163,385)
Total Other Financial Instruments $(163,385) $$$(163,385)
During the period ended January 31, 2025, there were no transfers in or out of Level 3.
Pioneer Municipal High Income Opportunities Fund, Inc. | 1/31/258

Pioneer Municipal High I... (NYSE:MIO)
Historical Stock Chart
From Jun 2025 to Jul 2025 Click Here for more Pioneer Municipal High I... Charts.
Pioneer Municipal High I... (NYSE:MIO)
Historical Stock Chart
From Jul 2024 to Jul 2025 Click Here for more Pioneer Municipal High I... Charts.