# EDGAR Filing Document

**Accession Number:** 0001864290
**File Stem:** 0000940400-26-012929
**Filing Date:** 2026-4
**Character Count:** 9167
**Document Hash:** 8d743e88cb9770799c2d295ae153d3aa
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0000940400-26-012929.hdr.sgml**: 20260401

**ACCESSION NUMBER**: 0000940400-26-012929

**CONFORMED SUBMISSION TYPE**: NPORT-P

**PUBLIC DOCUMENT COUNT**: 2

**CONFORMED PERIOD OF REPORT**: 20260130

**FILED AS OF DATE**: 20260401

**DATE AS OF CHANGE**: 20260401

**PERIOD START**: 20260430

**FILER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** Pioneer Municipal High Income Opportunities Fund, Inc.
- **CENTRAL INDEX KEY:** 0001864290

**ORGANIZATION NAME:**
- **EIN:** 000000000
- **STATE OF INCORPORATION:** MD
- **FISCAL YEAR END:** 0430

**FILING VALUES:**
- **FORM TYPE:** NPORT-P
- **SEC ACT:** 1940 Act
- **SEC FILE NUMBER:** 811-23699
- **FILM NUMBER:** 26827359

**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

## Nport-Ex

## Pioneer Municipal High Income Opportunities Fund, Inc.
Schedule of Investments \| January 31, 2026

------

### Schedule of Investments \| 1/31/26
(unaudited)

---

| | | |
|:---|:---|:---|
| &nbsp;&nbsp;**Principal<br> Amount<br> USD ($)** |  | **Value** |
|  | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;**UNAFFILIATED ISSUERS — 37.6%** |  |
|  | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;**Municipal Bonds — 37.6% of Net Assets(a)** |  |
|  | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;**Minnesota — 37.6%** |  |
| 1,430,000+ | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;City of Rochester, Rochester Math & Science Academy, Series A, 5.125%, 9/1/38 | $1139334 |
|  | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;**Total Minnesota** | **$1139334** |
|  | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;**Total Municipal Bonds<br> (Cost $1,453,275)** | **$1139334** |
|  | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;**TOTAL INVESTMENTS IN UNAFFILIATED ISSUERS — 37.6%<br> (Cost $1,453,275)** | **$1139334** |
|  | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;**OTHER ASSETS AND LIABILITIES — 62.4%** | $1893070 |
|  | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;**net assets — 100.0%** | **$3032404** |

---

---

| | |
|:---|:---|
| (a) | &nbsp;&nbsp;Consists of Revenue Bonds unless otherwise indicated. |
| \* | &nbsp;&nbsp;The Fund is in the process of liquidating its assets pursuant to the Plan of Liquidation and Dissolution approved by stockholders at a meeting originally scheduled for July 17, 2025 and adjourned to August 20, 2025 (See Note 9). Information shown in the Portfolio Summary reflects remaining investments held by the Fund at October 31, 2025. |
| + | &nbsp;&nbsp;Security is valued using significant unobservable inputs (Level 3). |

---

1Pioneer Municipal High Income Opportunities Fund, Inc. \| 1/31/26

------

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 January 31, 2026 in valuing the Fund's investments:

---

| | | | | |
|:---|:---|:---|:---|:---|
|  | **Level 1** | &nbsp;&nbsp;**Level 2** | &nbsp;&nbsp;**Level 3** | &nbsp;&nbsp;**Total** |
| Municipal Bonds | $— | &nbsp;&nbsp;$— | &nbsp;&nbsp;$1139334 | &nbsp;&nbsp;$1139334 |
| **Total Investments in Securities** | **$—** | &nbsp;&nbsp;**$—** | &nbsp;&nbsp;**$1139334** | &nbsp;&nbsp;**$1139334** |

---

During the period ended January 31, 2026, there were no transfers in or out of Level 3.

---

| | |
|:---|:---|
|  | **Municipal Bonds** |
| Balance as of 4/30/25 | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;$— |
| Realized gain (loss) | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;— |
| Changed in unrealized appreciation (depreciation) | &nbsp;&nbsp;&nbsp;&nbsp;(148655) |
| Amortization Premium/Discount | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(6346) |
| Purchases | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;— |
| Sales | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;— |
| Transfers in to Level 3\* | &nbsp;&nbsp;&nbsp;1294336 |
| Transfers out of Level 3\* | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;— |
| **Balance as of 1/31/26** | **$1139334** |

---

---

| | | |
|:---|:---|:---|
| \* | &nbsp;&nbsp;Transfers are calculated on the beginning of period values. During the period ended December 31, 2025, securities valued at $1,294,336 were transferred from Level 2 to Level 3, due to valuing the securities using unobservable inputs. There were no other transfers between Levels 1, 2 and 3. | &nbsp;&nbsp;Transfers are calculated on the beginning of period values. During the period ended December 31, 2025, securities valued at $1,294,336 were transferred from Level 2 to Level 3, due to valuing the securities using unobservable inputs. There were no other transfers between Levels 1, 2 and 3. |
| Net change in unrealized appreciation (depreciation) of Level 3 investments still held and considered Level 3 at January 31, 2026: | Net change in unrealized appreciation (depreciation) of Level 3 investments still held and considered Level 3 at January 31, 2026: | &nbsp;&nbsp;$(148655) |

---

Pioneer Municipal High Income Opportunities Fund, Inc. \| 1/31/262

## 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 Opportunities Fund, Inc.

- **b. Investment Company Act file number:** 811-23699

- **c. CIK number of Registrant:** 0001864290

- **d. LEI of Registrant:** 5493005BKX8X756MKL25

- **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 Opportunities Fund, Inc.

- **c. LEI of Series:** 5493005BKX8X756MKL25

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

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

- **b. Date as of which information is reported:** 2026-01-30

**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:** $3142692.74

**Total Liabilities:** $110403.01

**Net Assets:** $3032289.73

**Cash Not Reported:** $1973488.23

**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:** 0.00000000 | **1-Year:** 0.00000000 | **5-Year:** -1275.00000000 | **10-Year:** 0.00000000 | **30-Year:** 0.00000000

**Monthly Return Information**

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

**Monthly Gains & Losses**

| Period   | Net Realized Gain/Loss   | Net Unrealized Appreciation/Depreciation   |
|:---|:---|:---|
| Month 1  | $0.00                    | $-343848.25                                |
| Month 2  | $0.00                    | $10627.78                                  |
| Month 3  | $-114615.85              | $121337.24                                 |

### 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   |
|:---|:---|:---|:---|:---|:---|:---|---:|:---|:---|:---|:---|:---|:---|:---|---:|:---|
| ROCHESTER MN | City of Rochester MN | CUSIP: 77158CAB7<br>LEI: 549300006EX3INSHXA95 | Long             | DBT              | MUN               | US        |   1430000 | PA      | $1139334.25   | 37.57%            | 2038-09-01      | Fixed         | 5.12%                 | No            |                  3 | On Loan: No      |

### Signature

**Date Signed:** 2026-04-01

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

**Signature:** Carol Trevino

**Name of Signer:** Carol Trevino

**Title:** Treasurer