# EDGAR Filing Document

**Accession Number:** 0001223026
**File Stem:** 0000940400-25-002595
**Filing Date:** 2025-9
**Character Count:** 51008
**Document Hash:** e5c712715d170c55c6f49e8e9e660a48
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0000940400-25-002595.hdr.sgml**: 20250926

**ACCESSION NUMBER**: 0000940400-25-002595

**CONFORMED SUBMISSION TYPE**: NPORT-P

**PUBLIC DOCUMENT COUNT**: 2

**CONFORMED PERIOD OF REPORT**: 20250731

**FILED AS OF DATE**: 20250926

**DATE AS OF CHANGE**: 20250926

**PERIOD START**: 20260430

**FILER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** PIONEER MUNICIPAL HIGH INCOME FUND, INC.
- **CENTRAL INDEX KEY:** 0001223026

**ORGANIZATION NAME:**
- **EIN:** 030512430
- **STATE OF INCORPORATION:** MD
- **FISCAL YEAR END:** 0430

**FILING VALUES:**
- **FORM TYPE:** NPORT-P
- **SEC ACT:** 1940 Act
- **SEC FILE NUMBER:** 811-21321
- **FILM NUMBER:** 251346113

**BUSINESS ADDRESS:**
- **STREET 1:** 60 STATE STREET
- **STREET 2:** 5TH FLOOR
- **CITY:** BOSTON
- **STATE:** MA
- **ZIP:** 02109
- **BUSINESS PHONE:** 617-742-7825

**MAIL ADDRESS:**
- **STREET 1:** 60 STATE STREET
- **STREET 2:** 5TH FLOOR
- **CITY:** BOSTON
- **STATE:** MA
- **ZIP:** 02109

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** PIONEER MUNICIPAL HIGH INCOME TRUST
- **DATE OF NAME CHANGE:** 20030314

## Nport-Ex

## Pioneer Municipal High Income Fund, Inc.
Schedule of Investments \| July 31, 2025

&nbsp;&nbsp;**Ticker Symbol: MHI** 

------

### Schedule of Investments \| 7/31/25
(unaudited)

---

| | | |
|:---|:---|:---|
| &nbsp;&nbsp;**Principal<br> Amount<br> USD ($)** |  | **Value** |
|  | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;**UNAFFILIATED ISSUERS — 74.5%** |  |
|  | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;**Municipal Bonds — 74.5% of Net Assets(a)** |  |
|  | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;**Alabama — 1.2%** |  |
| 2010000 | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Mobile County Industrial Development Authority, Calvert LLC Project, Series A, 5.00%, 6/1/54 | $1811412 |
| 740000 | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Mobile County Industrial Development Authority, Calvert LLC Project, Series B, 4.75%, 12/1/54 | &nbsp;&nbsp; 646967 |
|  | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;**Total Alabama** | &nbsp;&nbsp;&nbsp;&nbsp; **$2458379** |
|  | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;**Arizona — 0.9%** |  |
| 2115000 | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Industrial Development Authority of the City of Phoenix, 3rd & Indian School Assisted Living Project, 5.40%, 10/1/36 | $1894871 |
|  | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;**Total Arizona** | &nbsp;&nbsp;&nbsp;&nbsp; **$1894871** |
|  | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;**Arkansas — 4.8%** |  |
| 10200000 | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Arkansas Development Finance Authority, Green Bond, 5.45%, 9/1/52 | $9973560 |
|  | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;**Total Arkansas** | &nbsp;&nbsp;&nbsp;&nbsp; **$9973560** |
|  | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;**California — 6.6%** |  |
| 5,300,000(b) | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;California Infrastructure & Economic Development Bank, Brightline West Passenger Rail Project, Series A, 9.50%, 1/1/65 (144A) | $4717000 |
| 2000000 | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;California Statewide Communities Development Authority, Loma Linda University Medical Center, 5.50%, 12/1/58 (144A) | &nbsp;&nbsp; 1916120 |
| 13,410,000(c) | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Golden State Tobacco Securitization Corp., Series B-2, 6/1/66 | &nbsp;&nbsp; 1274889 |
| 4000000 | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;San Diego County Regional Airport Authority, Private Activity, Series B, 5.25%, 7/1/58 | &nbsp;&nbsp; 4010840 |
| 1,580,000(d) | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;State of California, 5.00%, 3/1/32 | &nbsp;&nbsp; 1789318 |
|  | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;**Total California** | &nbsp;&nbsp; **$13708167** |
|  | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;**Colorado — 0.4%** |  |
| 1000000 | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Aerotropolis Regional Transportation Authority, 4.375%, 12/1/52 | $779560 |
|  | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;**Total Colorado** | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; **$779560** |
|  | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;**District of Columbia — 1.2%** |  |
| 10,000,000(c) | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;District of Columbia Tobacco Settlement Financing Corp., Capital Appreciation, Asset-Backed, Series A, 6/15/46 | $2511700 |
|  | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;**Total District of Columbia** | &nbsp;&nbsp;&nbsp;&nbsp; **$2511700** |

---

1Pioneer Municipal High Income Fund, Inc. \| 7/31/25

------

---

| | | |
|:---|:---|:---|
| &nbsp;&nbsp;**Principal<br> Amount<br> USD ($)** |  | **Value** |
|  | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;**Florida — 1.1%** |  |
| 2000000 | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Florida Development Finance Corp., Brightline Florida Passenger Rail Project, 5.50%, 7/1/53 | $1640000 |
| 1,000,000(b) | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Florida Development Finance Corp., Brightline Florida Passenger Rail Project, 14.00%, 7/15/32 (144A) | &nbsp;&nbsp; 730000 |
|  | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;**Total Florida** | &nbsp;&nbsp;&nbsp;&nbsp; **$2370000** |
|  | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;**Idaho — 2.4%** |  |
| 5000000 | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Power County Industrial Development Corp., FMC Corp. Project, 6.45%, 8/1/32 | $5014600 |
|  | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;**Total Idaho** | &nbsp;&nbsp;&nbsp;&nbsp; **$5014600** |
|  | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;**Illinois — 4.4%** |  |
| 2,000,000(d) | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Chicago Board of Education, Series A, 5.00%, 12/1/47 | $1799120 |
| 2,000,000(d) | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Chicago Board of Education, Series H, 5.00%, 12/1/46 | &nbsp;&nbsp; 1800540 |
| 202,143(b)(e) | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Illinois Finance Authority, Clare Oaks Project, Series A-3, 4.00%, 11/15/52 | &nbsp;&nbsp; 16171 |
| 3500000 | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Illinois Finance Authority, The Admiral at the Lake Project, 5.25%, 5/15/42 | &nbsp;&nbsp; 2765105 |
| 4000000 | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Illinois Finance Authority, The Admiral at the Lake Project, 5.25%, 5/15/54 | &nbsp;&nbsp; 2829920 |
|  | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;**Total Illinois** | &nbsp;&nbsp;&nbsp;&nbsp; **$9210856** |
|  | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;**Indiana — 1.0%** |  |
| 1250000 | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Indiana Finance Authority, Marquette Project, Series A, 5.375%, 3/1/55 | $1191475 |
| 1000000 | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Indiana Finance Authority, Multipurpose Educational Facilities, Avondale Meadows Academy Project, 5.375%, 7/1/47 | &nbsp;&nbsp; 925420 |
|  | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;**Total Indiana** | &nbsp;&nbsp;&nbsp;&nbsp; **$2116895** |
|  | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;**Iowa — 1.7%** |  |
| 3700000 | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Iowa Finance Authority, Alcoa Inc. Projects, 4.75%, 8/1/42 | $3494835 |
|  | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;**Total Iowa** | &nbsp;&nbsp;&nbsp;&nbsp; **$3494835** |
|  | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;**Louisiana — 3.9%** |  |
| 7945000 | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Louisiana Public Facilities Authority, I-10 Calcasieu River Bridge Public-Private Partnership Project, 5.75%, 9/1/64 | $8073709 |
|  | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;**Total Louisiana** | &nbsp;&nbsp;&nbsp;&nbsp; **$8073709** |
|  | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;**Maryland — 0.9%** |  |
| 1,800,000(d) | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;State of Maryland, Series A, 5.00%, 6/1/29 | $1965006 |
|  | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;**Total Maryland** | &nbsp;&nbsp;&nbsp;&nbsp; **$1965006** |

---

Pioneer Municipal High Income Fund, Inc. \| 7/31/252

------

(unaudited) (continued)

---

| | | |
|:---|:---|:---|
| &nbsp;&nbsp;**Principal<br> Amount<br> USD ($)** |  | **Value** |
|  | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;**Massachusetts — 6.5%** |  |
| 1,760,000(d) | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Commonwealth of Massachusetts, Series B, 5.00%, 6/1/33 | $1996139 |
| 1,760,000(d) | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Commonwealth of Massachusetts, Series B, 5.00%, 6/1/35 | &nbsp;&nbsp; 1998990 |
| 780000 | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Massachusetts Development Finance Agency, Gingercare Living Issue, Series A, 5.50%, 12/1/44 (144A) | &nbsp;&nbsp; 749354 |
| 695000 | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Massachusetts Development Finance Agency, Gingercare Living Issue, Series A, 5.875%, 12/1/60 (144A) | &nbsp;&nbsp; 625820 |
| 7100000 | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Massachusetts Development Finance Agency, WGBH Educational Foundation, Series A, 5.75%, 1/1/42 (AMBAC Insured) | &nbsp;&nbsp; 8049128 |
|  | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;**Total Massachusetts** | &nbsp;&nbsp; **$13419431** |
|  | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;**Michigan — 0.4%** |  |
| 945000 | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;David Ellis Academy-West, 5.25%, 6/1/45 | $827480 |
|  | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;**Total Michigan** | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; **$827480** |
|  | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;**Minnesota — 0.4%** |  |
| 1000000 | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;City of Ham Lake, DaVinci Academy, Series A, 5.00%, 7/1/47 | $841380 |
|  | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;**Total Minnesota** | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; **$841380** |
|  | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;**Nevada — 0.6%** |  |
| 1,500,000(d) | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Las Vegas Valley Water District, Series A, 4.00%, 6/1/51 | $1272090 |
|  | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;**Total Nevada** | &nbsp;&nbsp;&nbsp;&nbsp; **$1272090** |
|  | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;**New Jersey — 2.1%** |  |
| 2,250,000(b) | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;New Jersey Educational Facilities Authority, Princeton University, Series A, 5.00%, 7/1/64 | $2493922 |
| 1100000 | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;New Jersey Educational Facilities Authority, Princeton University, Series B, 5.00%, 7/1/31 | &nbsp;&nbsp; 1234695 |
| 475000 | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;New Jersey Educational Facilities Authority, Princeton University, Series B, 5.00%, 7/1/32 | &nbsp;&nbsp; 536940 |
|  | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;**Total New Jersey** | &nbsp;&nbsp;&nbsp;&nbsp; **$4265557** |
|  | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;**New Mexico — 1.0%** |  |
| 2,095,000(b) | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;County of Otero, Otero County Jail Project, Certificate Participation, 9.00%, 4/1/28 | $2019580 |
|  | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;**Total New Mexico** | &nbsp;&nbsp;&nbsp;&nbsp; **$2019580** |

---

3Pioneer Municipal High Income Fund, Inc. \| 7/31/25

------

---

| | | |
|:---|:---|:---|
| &nbsp;&nbsp;**Principal<br> Amount<br> USD ($)** |  | **Value** |
|  | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;**New York — 12.5%** |  |
| 6175000 | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Metropolitan Transportation Authority, Green Bond, Series C-1, 4.75%, 11/15/45 | $5873289 |
| 2000000 | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Metropolitan Transportation Authority, Green Bond, Series C-1, 5.25%, 11/15/55 | &nbsp;&nbsp; 1994560 |
| 2500000 | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;New York Counties Tobacco Trust IV, Settlement Pass-Through, Series A, 5.00%, 6/1/45 | &nbsp;&nbsp; 2178275 |
| 2500000 | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;New York Transportation Development Corp., Series A, 5.25%, 1/1/50 | &nbsp;&nbsp; 2400125 |
| 8000000 | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;New York Transportation Development Corp., Delta Airlines Inc-LaGuardia, 5.00%, 10/1/40 | &nbsp;&nbsp; 7848400 |
| 3730000 | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;New York Transportation Development Corp., JFK Airport Terminal 6 Redevelopment Project, Series A, 5.50%, 12/31/60 | &nbsp;&nbsp; 3606910 |
| 1000000 | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Suffolk Regional Off-Track Betting Co., 6.00%, 12/1/53 | &nbsp;&nbsp; 1012350 |
| 1000000 | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Westchester County Local Development Corp., Purchase Senior Learning Community, 5.00%, 7/1/56 (144A) | &nbsp;&nbsp; 848690 |
|  | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;**Total New York** | &nbsp;&nbsp; **$25762599** |
|  | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;**North Carolina — 0.4%** |  |
| 700,000(b) | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;North Carolina Medical Care Commission, Duke University Health System, Series B, 5.00%, 6/1/55 | $748272 |
|  | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;**Total North Carolina** | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; **$748272** |
|  | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;**Ohio — 2.1%** |  |
| 3440000 | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Buckeye Tobacco Settlement Financing Authority, Senior Class 2, Series B-2, 5.00%, 6/1/55 | $2794312 |
| 1540000 | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;State of Ohio, 5.00%, 12/31/39 | &nbsp;&nbsp; 1531176 |
|  | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;**Total Ohio** | &nbsp;&nbsp;&nbsp;&nbsp; **$4325488** |
|  | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;**Oklahoma — 0.5%** |  |
| 900000 | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Tulsa Municipal Airport Trust Trustees, American Airlines, Inc. Project, 6.25%, 12/1/35 | $989991 |
|  | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;**Total Oklahoma** | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; **$989991** |
|  | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;**Pennsylvania — 0.6%** |  |
| 500000 | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Philadelphia Authority for Industrial Development, 5.50%, 6/1/49 (144A) | $475550 |
| 1000000 | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Philadelphia Authority for Industrial Development, Global Leadership Academy Charter School Project, Series A, 5.00%, 11/15/50 | &nbsp;&nbsp; 799830 |
|  | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;**Total Pennsylvania** | &nbsp;&nbsp;&nbsp;&nbsp; **$1275380** |

---

Pioneer Municipal High Income Fund, Inc. \| 7/31/254

------

(unaudited) (continued)

---

| | | |
|:---|:---|:---|
| &nbsp;&nbsp;**Principal<br> Amount<br> USD ($)** |  | **Value** |
|  | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;**Puerto Rico — 6.0%** |  |
| 5,267,777(d) | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Commonwealth of Puerto Rico, Restructured Series A-1, 4.00%, 7/1/41 | $4588866 |
| 3,000,000(d) | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Commonwealth of Puerto Rico, Restructured Series A-1, 4.00%, 7/1/46 | &nbsp;&nbsp; 2493780 |
| 2500000 | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Puerto Rico Commonwealth Aqueduct & Sewer Authority, Series A, 5.00%, 7/1/47 (144A) | &nbsp;&nbsp; 2341775 |
| 1,349,000(b) | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Puerto Rico Industrial Development Co., 7.00%, 1/1/54 | &nbsp;&nbsp; 1257187 |
| 1863000 | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Puerto Rico Sales Tax Financing Corp., Series A-1, 5.00%, 7/1/58 | &nbsp;&nbsp; 1695703 |
|  | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;**Total Puerto Rico** | &nbsp;&nbsp; **$12377311** |
|  | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;**Rhode Island — 1.1%** |  |
| 5,900,000(e) | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Central Falls Detention Facility Corp., 7.25%, 7/15/35 | $2360000 |
|  | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;**Total Rhode Island** | &nbsp;&nbsp;&nbsp;&nbsp; **$2360000** |
|  | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;**Texas — 6.3%** |  |
| 490000 | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Arlington Higher Education Finance Corp., LTTS Charter School, Universal Academy, 5.45%, 3/1/49 (144A) | $450036 |
| 1000000 | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Arlington Higher Education Finance Corp., Universal Academy, Series A, 7.00%, 3/1/34 | &nbsp;&nbsp; 1001780 |
| 4360000 | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;City of Houston Airport System Revenue, 4.00%, 7/15/41 | &nbsp;&nbsp; 3733773 |
| 2500000 | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Greater Texas Cultural Education Facilities Finance Corp., Texas Biomedical Research Institute Project, Series A, 5.25%, 6/1/54 | &nbsp;&nbsp; 2452275 |
| 5800000 | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Texas Private Activity Bond Surface Transportation Corp., NTE Mobility Partners Segment 3 LLC Project, 5.00%, 6/30/58 | &nbsp;&nbsp; 5296096 |
|  | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;**Total Texas** | &nbsp;&nbsp; **$12933960** |
|  | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;**Utah — 0.2%** |  |
| 400000 | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;MIDA Mountain Village Public Infrastructure District, Series 1, 5.125%, 6/15/54 (144A) | $369860 |
|  | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;**Total Utah** | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; **$369860** |
|  | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;**Virginia — 1.0%** |  |
| 2610000 | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Tobacco Settlement Financing Corp., Series A-1, 6.706%, 6/1/46 | $2068086 |
|  | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;**Total Virginia** | &nbsp;&nbsp;&nbsp;&nbsp; **$2068086** |

---

5Pioneer Municipal High Income Fund, Inc. \| 7/31/25

------

---

| | | |
|:---|:---|:---|
| &nbsp;&nbsp;**Principal<br> Amount<br> USD ($)** |  | **Value** |
|  | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;**Washington — 1.3%** |  |
| 850000 | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Washington State Housing Finance Commission, Blakeley And Laurel Villages Portfolio, Series A, 5.50%, 7/1/50 (144A) | $825733 |
| 1800000 | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Washington State Housing Finance Commission, Blakeley And Laurel Villages Portfolio, Series A, 5.75%, 7/1/60 (144A) | &nbsp;&nbsp; 1798884 |
|  | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;**Total Washington** | &nbsp;&nbsp;&nbsp;&nbsp; **$2624617** |
|  | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;**Wisconsin — 1.0%** |  |
| 2000000 | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Public Finance Authority, Senior Lien-Puerto Rico Tollroads LLC, Series A, 5.75%, 7/1/54 | $2007760 |
|  | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;**Total Wisconsin** | &nbsp;&nbsp;&nbsp;&nbsp; **$2007760** |
|  | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;**Total Municipal Bonds<br> (Cost $160,937,674)** | **$154060980** |
|  | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;**TOTAL INVESTMENTS IN UNAFFILIATED ISSUERS — 74.5%<br> (Cost $160,937,674)** | **$154060980** |
|  | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;**OTHER ASSETS AND LIABILITIES — 25.5%** | &nbsp;&nbsp; $52622990 |
|  | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;**net assets applicable to common stockholders — 100.0%** | **$206683970** |

---

---

| | |
|:---|:---|
| AMBAC | &nbsp;&nbsp;Ambac Assurance Corporation. |
| (144A) | &nbsp;&nbsp;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 July 31, 2025, the value of these securities amounted to $15,848,822, or 7.7% of net assets applicable to common stockholders. |

---

(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 July 31, 2025.

(c) Security issued with a zero coupon. Income is recognized through accretion of discount.

(d) Represents a General Obligation Bond.

(e) Security is in default.

Pioneer Municipal High Income Fund, Inc. \| 7/31/256

------

(unaudited) (continued)

Various inputs are used in determining the value of the Fund's investments. These inputs are summarized in the three broad levels below.

---

| |
|:---|
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Level 1 – unadjusted quoted prices in active markets for identical securities. |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Level 2 – other significant observable inputs (including quoted prices for similar securities, interest rates, prepayment speeds, credit risks, etc.). |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;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 July 31, 2025 in valuing the Fund's investments:

---

| | | | | |
|:---|:---|:---|:---|:---|
|  | **Level 1** | &nbsp;&nbsp;**Level 2** | &nbsp;&nbsp;**Level 3** | &nbsp;&nbsp;**Total** |
| Municipal Bonds | $— | &nbsp;&nbsp;$154060980 | &nbsp;&nbsp;$— | &nbsp;&nbsp;$154060980 |
| **Total Investments in Securities** | **$—** | &nbsp;&nbsp;**$154060980** | &nbsp;&nbsp;**$—** | &nbsp;&nbsp;**$154060980** |

---

During the period ended July 31, 2025, there were no transfers in or out of Level 3.

7Pioneer Municipal High Income Fund, Inc. \| 7/31/25

## Form NPORT-P: Monthly Portfolio Investments Report

### NPORT-P: Part A: General Information

**Item A.1. Information about the Registrant.**

- **a. Name of Registrant:** Pioneer Municipal High Income Fund, Inc.

- **b. Investment Company Act file number:** 811-21321

- **c. CIK number of Registrant:** 0001223026

- **d. LEI of Registrant:** 5493009JYKCUKTUKGP36

- **e. Address and telephone number of Registrant.**

  - **Street Address 1:** 60 State Street

  - **City:** Boston

  - **State:** MA

  - **Foreign country:** US

  - **Zip / Postal Code:** 02109

  - **Telephone number:** 617-422-4947

**Item A.2. Information about the Series.**

- **a. Name of Series:** Pioneer Municipal High Income Fund, Inc.

- **c. LEI of Series:** 5493009JYKCUKTUKGP36

**Item A.3. Reporting period.**

- **a. Date of fiscal year-end:** 2026-04-30

- **b. Date as of which information is reported:** 2025-07-31

**Item A.4. Final filing**

Does the Fund anticipate that this will be its final filing on Form N-PORT? **No**

### Fund Information

**Total Assets:** $256942510.02

**Total Liabilities:** $50258540.19

**Net Assets:** $206683969.83

**Cash Not Reported:** $100558331.49

**Currency Risk Metrics (dv01):**

- 

**Credit Spread Risk - Investment Grade (dv01):**

- **3-Month:** -39.00000000 | **1-Year:** 0.00000000 | **5-Year:** -8333.00000000 | **10-Year:** -11816.00000000 | **30-Year:** -41835.00000000

**Credit Spread Risk - Non-Investment Grade (dv01):**

- **3-Month:** -8.00000000 | **1-Year:** 0.00000000 | **5-Year:** -915.00000000 | **10-Year:** -5629.00000000 | **30-Year:** -51500.00000000

**Monthly Return Information**

| Class               | Month 1 Return (%)   | Month 2 Return (%)   | Month 3 Return (%)   |
|:---|:---|:---|:---|
| Class ID C000000000 | -1.30%               | 0.49%                | -3.03%               |

**Monthly Gains & Losses**

| Period   | Net Realized Gain/Loss   | Net Unrealized Appreciation/Depreciation   |
|:---|:---|:---|
| Month 1  | $-4155545.57             | $690509.74                                 |
| Month 2  | $-215459.68              | $348032.99                                 |
| Month 3  | $-6133732.14             | $-1025804.30                               |

### Schedule of Portfolio Investments

| Name                           | Title                                                               | Identifiers                                   | Payoff Profile   | Asset Category   | Issuer Category   | Country   |   Balance | Units   | Value (USD)   | % of Net Assets   | Maturity Date   | Coupon Type   | Annualized Rate (%)   | Restricted?   |   Fair Value Level | Lending Status   |
|:---|:---|:---|:---|:---|:---|:---|---:|:---|:---|:---|:---|:---|:---|:---|---:|:---|
| MOBILE CNTY AL INDL DEV AUTH S | Mobile County Industrial Development Authority                      | CUSIP: 60733UAA9<br>LEI: N/A                  | Long             | DBT              | MUN               | US        |   2010000 | PA      | $1811412.00   | 0.88%             | 2054-06-01      | Fixed         | 5.00%                 | No            |                  2 | On Loan: No      |
| NEW JERSEY ST EDUCTNL FACS AUT | New Jersey Educational Facilities Authority                         | CUSIP: 646067KL1<br>LEI: 549300UTOO4X537XXG70 | Long             | DBT              | MUN               | US        |   1100000 | PA      | $1234695.00   | 0.60%             | 2031-07-01      | Fixed         | 5.00%                 | No            |                  2 | On Loan: No      |
| TOBACCO SETTLEMENT FING CORP V | Tobacco Settlement Financing Corp/VA                                | CUSIP: 88880NAT6<br>LEI: N/A                  | Long             | DBT              | MUN               | US        |   2610000 | PA      | $2068085.70   | 1.00%             | 2046-06-01      | Fixed         | 6.71%                 | No            |                  2 | On Loan: No      |
| ARLINGTON TX HGR EDU FIN CORP  | Arlington Higher Education Finance Corp                             | CUSIP: 041806AM2<br>LEI: N/A                  | Long             | DBT              | MUN               | US        |   1000000 | PA      | $1001780.00   | 0.48%             | 2034-03-01      | Fixed         | 7.00%                 | No            |                  2 | On Loan: No      |
| NORTH CAROLINA ST MED CARE COM | North Carolina Medical Care Commission                              | CUSIP: 65821DZV6<br>LEI: 549300FH6KOXGCHQYG81 | Long             | DBT              | MUN               | US        |    700000 | PA      | $748272.00    | 0.36%             | 2055-06-01      | Variable      | 5.00%                 | No            |                  2 | On Loan: No      |
| ILLINOIS ST FIN AUTH REVENUE   | Illinois Finance Authority                                          | CUSIP: 45204FEP6<br>LEI: 549300ZG6UBPNNNRN315 | Long             | DBT              | MUN               | US        |    202143 | PA      | $16171.46     | 0.01%             | 2052-11-15      | Variable      | 4.00%                 | No            |                  2 | On Loan: No      |
| ARLINGTON TX HGR EDU FIN CORP  | Arlington Higher Education Finance Corp                             | CUSIP: 041806XD7<br>LEI: N/A                  | Long             | DBT              | MUN               | US        |    490000 | PA      | $450035.60    | 0.22%             | 2049-03-01      | Fixed         | 5.45%                 | No            |                  2 | On Loan: No      |
| WASHINGTON ST HSG FIN COMMISSI | Washington State Housing Finance Commission                         | CUSIP: 93978LJM9<br>LEI: 549300YL1HU59NREG764 | Long             | DBT              | MUN               | US        |    850000 | PA      | $825732.50    | 0.40%             | 2050-07-01      | Fixed         | 5.50%                 | No            |                  2 | On Loan: No      |
| NEW YORK ST TRANSPRTN DEV CORP | New York Transportation Development Corp                            | CUSIP: 650116CZ7<br>LEI: N/A                  | Long             | DBT              | MUN               | US        |   8000000 | PA      | $7848400.00   | 3.80%             | 2040-10-01      | Fixed         | 5.00%                 | No            |                  2 | On Loan: No      |
| CALIFORNIA STWD CMNTYS DEV AUT | California Statewide Communities Development Authority              | CUSIP: 13080SVN1<br>LEI: 549300KTNI2GCJNX2U48 | Long             | DBT              | MUN               | US        |   2000000 | PA      | $1916120.00   | 0.93%             | 2058-12-01      | Fixed         | 5.50%                 | No            |                  2 | On Loan: No      |
| MASSACHUSETTS ST               | Commonwealth of Massachusetts                                       | CUSIP: 57582TDE9<br>LEI: 5493001N1YCXNI1O7K10 | Long             | DBT              | MUN               | US        |   1760000 | PA      | $1996139.20   | 0.97%             | 2033-06-01      | Fixed         | 5.00%                 | No            |                  2 | On Loan: No      |
| OHIO ST PRIVATE ACTIVITY REVEN | State of Ohio                                                       | CUSIP: 67759YAX5<br>LEI: 5493005LEB5E170OMX59 | Long             | DBT              | MUN               | US        |   1540000 | PA      | $1531175.80   | 0.74%             | 2039-12-31      | Fixed         | 5.00%                 | No            |                  2 | On Loan: No      |
| PHILADELPHIA PA AUTH FOR INDL  | Philadelphia Authority for Industrial Development                   | CUSIP: 71780CAC4<br>LEI: 549300DIY68KQZEW7M79 | Long             | DBT              | MUN               | US        |    500000 | PA      | $475550.00    | 0.23%             | 2049-06-01      | Fixed         | 5.50%                 | No            |                  2 | On Loan: No      |
| MET TRANSPRTN AUTH NY REVENUE  | Metropolitan Transportation Authority                               | CUSIP: 59261AG50<br>LEI: 5493000TKYODLXADQD60 | Long             | DBT              | MUN               | US        |   2000000 | PA      | $1994560.00   | 0.97%             | 2055-11-15      | Fixed         | 5.25%                 | No            |                  2 | On Loan: No      |
| NEW JERSEY ST EDUCTNL FACS AUT | New Jersey Educational Facilities Authority                         | CUSIP: 646067KE7<br>LEI: 549300UTOO4X537XXG70 | Long             | DBT              | MUN               | US        |   2250000 | PA      | $2493922.50   | 1.21%             | 2064-07-01      | Variable      | 5.00%                 | No            |                  2 | On Loan: No      |
| HOUSTON TX ARPT SYS REVENUE    | City of Houston TX Airport System Revenue                           | CUSIP: 442349GA8<br>LEI: N/A                  | Long             | DBT              | MUN               | US        |   4360000 | PA      | $3733773.20   | 1.81%             | 2041-07-15      | Fixed         | 4.00%                 | No            |                  2 | On Loan: No      |
| LOUISIANA PUB FACS AUTH REVENU | Louisiana Public Facilities Authority                               | CUSIP: 546399SZ0<br>LEI: 549300RQIPT5S4P4M065 | Long             | DBT              | MUN               | US        |   7945000 | PA      | $8073709.00   | 3.91%             | 2064-09-01      | Fixed         | 5.75%                 | No            |                  2 | On Loan: No      |
| SUFFOLK REGL OFF-TRACK BETTING | Suffolk Regional Off-Track Betting Corp                             | CUSIP: 86480TAC8<br>LEI: N/A                  | Long             | DBT              | MUN               | US        |   1000000 | PA      | $1012350.00   | 0.49%             | 2053-12-01      | Fixed         | 6.00%                 | No            |                  2 | On Loan: No      |
| ARKANSAS DEV FIN AUTH ENVIRONM | Arkansas Development Finance Authority                              | CUSIP: 04110FAA3<br>LEI: N/A                  | Long             | DBT              | MUN               | US        |  10200000 | PA      | $9973560.00   | 4.83%             | 2052-09-01      | Fixed         | 5.45%                 | No            |                  2 | On Loan: No      |
| HAM LAKE MN CHRT SCH LEASE REV | City of Ham Lake MN                                                 | CUSIP: 406511AC9<br>LEI: N/A                  | Long             | DBT              | MUN               | US        |   1000000 | PA      | $841380.00    | 0.41%             | 2047-07-01      | Fixed         | 5.00%                 | No            |                  2 | On Loan: No      |
| TULSA OK MUNI ARPT TRUST TRUST | Tulsa Municipal Airport Trust Trustees/OK                           | CUSIP: 899661EM0<br>LEI: N/A                  | Long             | DBT              | MUN               | US        |    900000 | PA      | $989991.00    | 0.48%             | 2035-12-01      | Fixed         | 6.25%                 | No            |                  2 | On Loan: No      |
| FLORIDA ST DEV FIN CORP        | Florida Development Finance Corp                                    | CUSIP: 340618DK0<br>LEI: 549300HC854CNBLMWC48 | Long             | DBT              | MUN               | US        |   1000000 | PA      | $730000.00    | 0.35%             | 2032-07-15      | Variable      | 12.00%                | No            |                  2 | On Loan: No      |
| NEW YORK ST TRANSPRTN DEV CORP | New York Transportation Development Corp                            | CUSIP: 650116HW9<br>LEI: N/A                  | Long             | DBT              | MUN               | US        |   3730000 | PA      | $3606910.00   | 1.75%             | 2060-12-31      | Fixed         | 5.50%                 | No            |                  2 | On Loan: No      |
| CALIFORNIA ST INFRASTRUCTURE & | California Infrastructure & Economic Development Bank               | CUSIP: 13034A6B1<br>LEI: 549300C1OG9RDIM8ET06 | Long             | DBT              | MUN               | US        |   5300000 | PA      | $4717000.00   | 2.28%             | 2065-01-01      | Variable      | 9.50%                 | No            |                  2 | On Loan: No      |
| MET TRANSPRTN AUTH NY REVENUE  | Metropolitan Transportation Authority                               | CUSIP: 59261AG35<br>LEI: 5493000TKYODLXADQD60 | Long             | DBT              | MUN               | US        |   6175000 | PA      | $5873289.50   | 2.84%             | 2045-11-15      | Fixed         | 4.75%                 | No            |                  2 | On Loan: No      |
| NEW YORK ST TRANSPRTN DEV CORP | New York Transportation Development Corp                            | CUSIP: 650116AV8<br>LEI: N/A                  | Long             | DBT              | MUN               | US        |   2500000 | PA      | $2400125.00   | 1.16%             | 2050-01-01      | Fixed         | 5.25%                 | No            |                  2 | On Loan: No      |
| IOWA ST FIN AUTH MIDWSTRN DISA | Iowa Finance Authority                                              | CUSIP: 46246SAE5<br>LEI: 549300NQVL49BTHOW391 | Long             | DBT              | MUN               | US        |   3700000 | PA      | $3494835.00   | 1.69%             | 2042-08-01      | Fixed         | 4.75%                 | No            |                  2 | On Loan: No      |
| NEW YORK CNTYS NY TOBACCO TRUS | New York Counties Tobacco Trust IV                                  | CUSIP: 62947YAE1<br>LEI: N/A                  | Long             | DBT              | MUN               | US        |   2500000 | PA      | $2178275.00   | 1.05%             | 2045-06-01      | Fixed         | 5.00%                 | No            |                  2 | On Loan: No      |
| PUERTO RICO CMWLTH INDL DEV CO | Puerto Rico Industrial Development Co                               | CUSIP: 745211LM2<br>LEI: N/A                  | Long             | DBT              | MUN               | US        |   1349000 | PA      | $1257187.06   | 0.61%             | 2054-01-01      | Variable      | 7.00%                 | No            |                  2 | On Loan: No      |
| SAN DIEGO CNTY CA REGL ARPT AU | San Diego County Regional Airport Authority                         | CUSIP: 79739GRM0<br>LEI: N/A                  | Long             | DBT              | MUN               | US        |   4000000 | PA      | $4010840.00   | 1.94%             | 2058-07-01      | Fixed         | 5.25%                 | No            |                  2 | On Loan: No      |
| PUERTO RICO CMWLTH             | Commonwealth of Puerto Rico                                         | CUSIP: 74514L3N5<br>LEI: 549300X44HXPLJU48U63 | Long             | DBT              | MUN               | US        |   5267777 | PA      | $4588865.90   | 2.22%             | 2041-07-01      | Fixed         | 4.00%                 | No            |                  2 | On Loan: No      |
| PUERTO RICO CMWLTH             | Commonwealth of Puerto Rico                                         | CUSIP: 74514L3P0<br>LEI: 549300X44HXPLJU48U63 | Long             | DBT              | MUN               | US        |   3000000 | PA      | $2493780.00   | 1.21%             | 2046-07-01      | Fixed         | 4.00%                 | No            |                  2 | On Loan: No      |
| PHOENIX AZ INDL DEV AUTH MF HS | Industrial Development Authority of the City of Phoenix Arizona/The | CUSIP: 718903RP4<br>LEI: 549300A62PWFBDWB8332 | Long             | DBT              | MUN               | US        |   2115000 | PA      | $1894870.80   | 0.92%             | 2036-10-01      | Fixed         | 5.40%                 | No            |                  2 | On Loan: No      |
| PHILADELPHIA PA AUTH FOR INDL  | Philadelphia Authority for Industrial Development                   | CUSIP: 71780CAM2<br>LEI: 549300DIY68KQZEW7M79 | Long             | DBT              | MUN               | US        |   1000000 | PA      | $799830.00    | 0.39%             | 2050-11-15      | Fixed         | 5.00%                 | No            |                  2 | On Loan: No      |
| PUERTO RICO SALES TAX FING COR | Puerto Rico Sales Tax Financing Corp Sales Tax Revenue              | CUSIP: 74529JPX7<br>LEI: N/A                  | Long             | DBT              | MUN               | US        |   1863000 | PA      | $1695702.60   | 0.82%             | 2058-07-01      | Fixed         | 5.00%                 | No            |                  2 | On Loan: No      |
| CALIFORNIA ST                  | State of California                                                 | CUSIP: 13063ELV6<br>LEI: N/A                  | Long             | DBT              | MUN               | US        |   1580000 | PA      | $1789318.40   | 0.87%             | 2032-03-01      | Fixed         | 5.00%                 | No            |                  2 | On Loan: No      |
| DIST OF COLUMBIA TOBACCO SETTL | District of Columbia Tobacco Settlement Financing Corp              | CUSIP: 254842BB2<br>LEI: N/A                  | Long             | DBT              | MUN               | US        |  10000000 | PA      | $2511700.00   | 1.22%             | 2046-06-15      | None          | 0.00%                 | No            |                  2 | On Loan: No      |
| PWR CNTY ID INDL DEV CORP SOL  | Power County Industrial Development Corp                            | CUSIP: 739247AA2<br>LEI: N/A                  | Long             | DBT              | MUN               | US        |   5000000 | PA      | $5014600.00   | 2.43%             | 2032-08-01      | Fixed         | 6.45%                 | No            |                  2 | On Loan: No      |
| MASSACHUSETTS ST               | Commonwealth of Massachusetts                                       | CUSIP: 57582TDG4<br>LEI: 5493001N1YCXNI1O7K10 | Long             | DBT              | MUN               | US        |   1760000 | PA      | $1998990.40   | 0.97%             | 2035-06-01      | Fixed         | 5.00%                 | No            |                  2 | On Loan: No      |
| FLORIDA ST DEV FIN CORP        | Florida Development Finance Corp                                    | CUSIP: 340618DT1<br>LEI: 549300HC854CNBLMWC48 | Long             | DBT              | MUN               | US        |   2000000 | PA      | $1640000.00   | 0.79%             | 2053-07-01      | Fixed         | 5.50%                 | No            |                  2 | On Loan: No      |
| GREATER TEXAS CULTURAL EDU FAC | Greater Texas Cultural Education Facilities Finance Corp            | CUSIP: 39237QBU8<br>LEI: N/A                  | Long             | DBT              | MUN               | US        |   2500000 | PA      | $2452275.00   | 1.19%             | 2054-06-01      | Fixed         | 5.25%                 | No            |                  2 | On Loan: No      |
| MASSACHUSETTS ST DEV FIN AGY R | Massachusetts Development Finance Agency                            | CUSIP: 57585BCX4<br>LEI: 549300UZSVMFXJK08K70 | Long             | DBT              | MUN               | US        |    695000 | PA      | $625819.70    | 0.30%             | 2060-12-01      | Fixed         | 5.88%                 | No            |                  2 | On Loan: No      |
| CHICAGO IL BRD OF EDU          | Chicago Board of Education                                          | CUSIP: 167505YB6<br>LEI: 54930099NR6T9V7LVB43 | Long             | DBT              | MUN               | US        |   2000000 | PA      | $1799120.00   | 0.87%             | 2047-12-01      | Fixed         | 5.00%                 | No            |                  2 | On Loan: No      |
| DAVID ELLIS ACADEMY WEST MI    | David Ellis Academy-West                                            | CUSIP: 238560AA4<br>LEI: N/A                  | Long             | DBT              | MUN               | US        |    945000 | PA      | $827479.80    | 0.40%             | 2045-06-01      | Fixed         | 5.25%                 | No            |                  2 | On Loan: No      |
| CENTRL FALLS RI DETENTION FAC  | Central Falls Detention Facility Corp                               | CUSIP: 153457AX4<br>LEI: N/A                  | Long             | DBT              | MUN               | US        |   5900000 | PA      | $2360000.00   | 1.14%             | 2035-07-15      | Fixed         | 7.25%                 | No            |                  2 | On Loan: No      |
| NEW JERSEY ST EDUCTNL FACS AUT | New Jersey Educational Facilities Authority                         | CUSIP: 646067KM9<br>LEI: 549300UTOO4X537XXG70 | Long             | DBT              | MUN               | US        |    475000 | PA      | $536940.00    | 0.26%             | 2032-07-01      | Fixed         | 5.00%                 | No            |                  2 | On Loan: No      |
| ILLINOIS ST FIN AUTH REVENUE   | Illinois Finance Authority                                          | CUSIP: 45204EC30<br>LEI: 549300ZG6UBPNNNRN315 | Long             | DBT              | MUN               | US        |   3500000 | PA      | $2765105.00   | 1.34%             | 2042-05-15      | Fixed         | 5.25%                 | No            |                  2 | On Loan: No      |
| WASHINGTON ST HSG FIN COMMISSI | Washington State Housing Finance Commission                         | CUSIP: 93978LJP2<br>LEI: 549300YL1HU59NREG764 | Long             | DBT              | MUN               | US        |   1800000 | PA      | $1798884.00   | 0.87%             | 2060-07-01      | Fixed         | 5.75%                 | No            |                  2 | On Loan: No      |
| MASSACHUSETTS ST DEV FIN AGY R | Massachusetts Development Finance Agency                            | CUSIP: 57585BCW6<br>LEI: 549300UZSVMFXJK08K70 | Long             | DBT              | MUN               | US        |    780000 | PA      | $749353.80    | 0.36%             | 2044-12-01      | Fixed         | 5.50%                 | No            |                  2 | On Loan: No      |
| MIDA MOUNTAIN VLG PUBLIC INFRA | Mida Mountain Village Public Infrastructure District                | CUSIP: 59561UAA8<br>LEI: N/A                  | Long             | DBT              | MUN               | US        |    400000 | PA      | $369860.00    | 0.18%             | 2054-06-15      | Fixed         | 5.12%                 | No            |                  2 | On Loan: No      |
| BUCKEYE OH TOBACCO SETTLEMENT  | Buckeye Tobacco Settlement Financing Authority                      | CUSIP: 118217CZ9<br>LEI: N/A                  | Long             | DBT              | MUN               | US        |   3440000 | PA      | $2794312.00   | 1.35%             | 2055-06-01      | Fixed         | 5.00%                 | No            |                  2 | On Loan: No      |
| CHICAGO IL BRD OF EDU          | Chicago Board of Education                                          | CUSIP: 167505TK2<br>LEI: 54930099NR6T9V7LVB43 | Long             | DBT              | MUN               | US        |   2000000 | PA      | $1800540.00   | 0.87%             | 2046-12-01      | Fixed         | 5.00%                 | No            |                  2 | On Loan: No      |
| GOLDEN ST TOBACCO SECURITIZATI | Golden State Tobacco Securitization Corp                            | CUSIP: 38122NB84<br>LEI: N/A                  | Long             | DBT              | MUN               | US        |  13410000 | PA      | $1274888.70   | 0.62%             | 2066-06-01      | None          | 0.00%                 | No            |                  2 | On Loan: No      |
| MASSACHUSETTS ST DEV FIN AGY   | Massachusetts Development Finance Agency                            | CUSIP: 57583FZE4<br>LEI: 549300UZSVMFXJK08K70 | Long             | DBT              | MUN               | US        |   7100000 | PA      | $8049128.00   | 3.89%             | 2042-01-01      | Fixed         | 5.75%                 | No            |                  2 | On Loan: No      |
| MARYLAND ST                    | State of Maryland                                                   | CUSIP: 574193WY0<br>LEI: N/A                  | Long             | DBT              | MUN               | US        |   1800000 | PA      | $1965006.00   | 0.95%             | 2029-06-01      | Fixed         | 5.00%                 | No            |                  2 | On Loan: No      |
| WESTCHESTER CNTY NY LOCAL DEV  | Westchester County Local Development Corp                           | CUSIP: 95737TEU6<br>LEI: 549300KOSU8OC75V9238 | Long             | DBT              | MUN               | US        |   1000000 | PA      | $848690.00    | 0.41%             | 2056-07-01      | Fixed         | 5.00%                 | No            |                  2 | On Loan: No      |
| ILLINOIS ST FIN AUTH REVENUE   | Illinois Finance Authority                                          | CUSIP: 45204EC55<br>LEI: 549300ZG6UBPNNNRN315 | Long             | DBT              | MUN               | US        |   4000000 | PA      | $2829920.00   | 1.37%             | 2054-05-15      | Fixed         | 5.25%                 | No            |                  2 | On Loan: No      |
| LAS VEGAS VLY NV WTR DIST      | Las Vegas Valley Water District                                     | CUSIP: 517845NQ2<br>LEI: N/A                  | Long             | DBT              | MUN               | US        |   1500000 | PA      | $1272090.00   | 0.62%             | 2051-06-01      | Fixed         | 4.00%                 | No            |                  2 | On Loan: No      |
| AEROTROPOLIS REGL TRANPRTN AUT | Aerotropolis Regional Transportation Authority                      | CUSIP: 008051AC8<br>LEI: N/A                  | Long             | DBT              | MUN               | US        |   1000000 | PA      | $779560.00    | 0.38%             | 2052-12-01      | Fixed         | 4.38%                 | No            |                  2 | On Loan: No      |
| INDIANA ST FIN AUTH REVENUE    | Indiana Finance Authority                                           | CUSIP: 45506EPA5<br>LEI: 549300PS0PAS7NDSSI20 | Long             | DBT              | MUN               | US        |   1250000 | PA      | $1191475.00   | 0.58%             | 2055-03-01      | Fixed         | 5.38%                 | No            |                  2 | On Loan: No      |
| INDIANA ST FIN AUTH REVENUE    | Indiana Finance Authority                                           | CUSIP: 45506DF91<br>LEI: 549300PS0PAS7NDSSI20 | Long             | DBT              | MUN               | US        |   1000000 | PA      | $925420.00    | 0.45%             | 2047-07-01      | Fixed         | 5.38%                 | No            |                  2 | On Loan: No      |
| MOBILE CNTY AL INDL DEV AUTH S | Mobile County Industrial Development Authority                      | CUSIP: 60733UAB7<br>LEI: N/A                  | Long             | DBT              | MUN               | US        |    740000 | PA      | $646967.20    | 0.31%             | 2054-12-01      | Fixed         | 4.75%                 | No            |                  2 | On Loan: No      |
| TEXAS ST PRIV ACTIVITY BOND SU | Texas Private Activity Bond Surface Transportation Corp             | CUSIP: 882667AN8<br>LEI: N/A                  | Long             | DBT              | MUN               | US        |   5800000 | PA      | $5296096.00   | 2.56%             | 2058-06-30      | Fixed         | 5.00%                 | No            |                  2 | On Loan: No      |
| PUERTO RICO CMWLTH AQUEDUCT &  | Puerto Rico Commonwealth Aqueduct & Sewer Authority                 | CUSIP: 745160SJ1<br>LEI: N/A                  | Long             | DBT              | MUN               | US        |   2500000 | PA      | $2341775.00   | 1.13%             | 2047-07-01      | Fixed         | 5.00%                 | No            |                  2 | On Loan: No      |
| OTERO CNTY NM COPS             | County of Otero NM                                                  | CUSIP: 688824AK7<br>LEI: N/A                  | Long             | DBT              | MUN               | US        |   2095000 | PA      | $2019580.00   | 0.98%             | 2028-04-01      | Variable      | 9.00%                 | No            |                  2 | On Loan: No      |
| PUBLIC FIN AUTH WI REVENUE     | Public Finance Authority                                            | CUSIP: 74442PF75<br>LEI: 5493004S6D3NA627K012 | Long             | DBT              | MUN               | US        |   2000000 | PA      | $2007760.00   | 0.97%             | 2054-07-01      | Fixed         | 5.75%                 | No            |                  2 | On Loan: No      |

### Signature

**Date Signed:** 2025-09-24

**Name of Applicant:** Pioneer Municipal High Income Fund, Inc.

**Signature:** Carol Trevino

**Name of Signer:** Carol Trevino

**Title:** Treasurer