# EDGAR Filing Document

**Accession Number:** 0001223026
**File Stem:** 0000940400-25-014038
**Filing Date:** 2025-12
**Character Count:** 6245
**Document Hash:** c1172504594d24469d6f7f3388bb6981
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0000940400-25-014038.hdr.sgml**: 20251219

**ACCESSION NUMBER**: 0000940400-25-014038

**CONFORMED SUBMISSION TYPE**: NPORT-P

**PUBLIC DOCUMENT COUNT**: 1

**CONFORMED PERIOD OF REPORT**: 20251031

**FILED AS OF DATE**: 20251219

**DATE AS OF CHANGE**: 20251219

**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:** 251588289

**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

## 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:** 2025-10-31

**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:** $8725397.58

**Total Liabilities:** $187253.01

**Net Assets:** $8538144.57

**Cash Not Reported:** $2702260.48

**Currency Risk Metrics (dv01):**

- 

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

- **3-Month:** 0.00000000 | **1-Year:** 0.00000000 | **5-Year:** 0.00000000 | **10-Year:** 0.00000000 | **30-Year:** 0.00000000

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

- **3-Month:** -8.00000000 | **1-Year:** 0.00000000 | **5-Year:** 0.00000000 | **10-Year:** 0.00000000 | **30-Year:** -1873.00000000

**Monthly Return Information**

| Class               | Month 1 Return (%)   | Month 2 Return (%)   | Month 3 Return (%)   |
|:---|:---|:---|:---|
| Class ID C000000000 | -1.36%               |  |  |

**Monthly Gains & Losses**

| Period   | Net Realized Gain/Loss   | Net Unrealized Appreciation/Depreciation   |
|:---|:---|:---|
| Month 1  | $-5314738.69             | $2813156.79                                |
| Month 2  | $-125700.00              | $182996.67                                 |
| Month 3  | $-164771.38              | $96547.49                                  |

### 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   |
|:---|:---|:---|:---|:---|:---|:---|---:|:---|:---|:---|:---|:---|:---|:---|---:|:---|
| CENTRL FALLS RI DETENTION FAC | Central Falls Detention Facility Corp             | CUSIP: 153457AX4<br>LEI: N/A                  | Long             | DBT              | MUN               | US        |   5900000 | PA      | $2360000.00   | 27.64%            | 2035-07-15      | Fixed         | 7.25%                 | 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      | $500580.00    | 5.86%             | 2049-06-01      | Fixed         | 5.50%                 | 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      | $1002140.00   | 11.74%            | 2034-03-01      | Fixed         | 7.00%                 | 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      | $484276.80    | 5.67%             | 2049-03-01      | Fixed         | 5.45%                 | 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      | $881458.20    | 10.32%            | 2045-06-01      | Fixed         | 5.25%                 | 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      | $724670.00    | 8.49%             | 2050-11-15      | Fixed         | 5.00%                 | No            |                  2 | On Loan: No      |

### Signature

**Date Signed:** 2025-12-19

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

**Signature:** Carol Trevino

**Name of Signer:** Carol Trevino

**Title:** Treasurer