# EDGAR Filing Document

**Accession Number:** 0001166258
**File Stem:** 0000940400-26-007869
**Filing Date:** 2026-2
**Character Count:** 29749
**Document Hash:** a34f9a39bc0492e71a9393addef9da5b
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0000940400-26-007869.hdr.sgml**: 20260225

**ACCESSION NUMBER**: 0000940400-26-007869

**CONFORMED SUBMISSION TYPE**: NPORT-P

**PUBLIC DOCUMENT COUNT**: 2

**CONFORMED PERIOD OF REPORT**: 20251231

**FILED AS OF DATE**: 20260225

**DATE AS OF CHANGE**: 20260225

**PERIOD START**: 20260331

**FILER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** PIONEER HIGH INCOME FUND, INC.
- **CENTRAL INDEX KEY:** 0001166258

**ORGANIZATION NAME:**
- **EIN:** 020563892
- **STATE OF INCORPORATION:** MD
- **FISCAL YEAR END:** 0331

**FILING VALUES:**
- **FORM TYPE:** NPORT-P
- **SEC ACT:** 1940 Act
- **SEC FILE NUMBER:** 811-21043
- **FILM NUMBER:** 26676888

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

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

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** PIONEER HIGH INCOME TRUST
- **DATE OF NAME CHANGE:** 20020129

## Nport-Ex

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

Stockholders of Pioneer High Income Fund, Inc. (the "Fund") approved the liquidation of the Fund pursuant to a Plan of Liquidation and Dissolution at a meeting of stockholders originally scheduled for July 17, 2025 and adjourned to August 20, 2025. Since August 20, 2025, the Fund has been operating under the Plan of Liquidation and Dissolution, and is in the process of winding up its business and affairs, paying its liabilities and distributing its remaining assets to stockholders. Accordingly, the Fund no longer pursues its stated investment objective, complies with its investment limitations or engages in normal business activities. Prior to the opening of business on September 26, 2025, the Fund ceased trading on the New York Stock Exchange (NYSE). The Fund's NYSE ticker symbol was PHT.

------

### Schedule of Investments \| 12/31/25\*
(unaudited)

---

| | | |
|:---|:---|:---|
| &nbsp;&nbsp;**Shares** |  | **Value** |
|  | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;**UNAFFILIATED ISSUERS — 100.1%** |  |
|  | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;**Common Stocks — 0.0%† of Net Assets** |  |
|  | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;**Commercial Services & Supplies — 0.0%** |  |
| 251,944(a)+ | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Atento Luxco 1 S.A. | $— |
|  | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;**Total Commercial Services & Supplies** | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; **$** **—** |
|  | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;**Oil, Gas & Consumable Fuels — 0.0%†** |  |
| 8,027(a) | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Petroquest Energy, Inc. | $1044 |
|  | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;**Total Oil, Gas & Consumable Fuels** | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; **$** **1044** |
|  | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;**Total Common Stocks<br> (Cost $709,311)** | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; **$** **1044** |

---

---

| | | |
|:---|:---|:---|
| &nbsp;&nbsp;**Principal<br> Amount<br> USD ($)** |  |  |
|  | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;**Convertible Corporate Bonds — 0.2%<br> of Net Assets** |  |
|  | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;**Banks — 0.2%** |  |
| &nbsp;&nbsp;IDR1,422,679,000 | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;PT Bakrie & Brothers Tbk, 6/30/26 | $21671 |
|  | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;**Total Banks** | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; **$** **21671** |
|  | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;**Total Convertible Corporate Bonds<br> (Cost $103,505)** | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; **$** **21671** |
|  | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;**Corporate Bonds — 0.0%† of Net Assets** |  |
|  | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;**Banks — 0.0%†** |  |
| 140000 | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Credito Real S.A.B de CV SOFOM ENR, 8.00%, 1/21/28 | $14 |
|  | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;**Total Banks** | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; **$** **14** |
|  | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;**Diversified Financial Services — 0.0%†** |  |
| 1500000 | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Credito Real S.A.B de CV SOFOM ENR, 9.50%, 2/7/26 | $150 |
|  | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;**Total Diversified Financial Services** | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; **$** **150** |
|  | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;**Pharmaceuticals — 0.0%** |  |
| 2,600,000+ | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Tricida, Inc., 5/15/27 | $— |
|  | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;**Total Pharmaceuticals** | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; **$** **—** |
|  | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;**Total Corporate Bonds<br> (Cost $1,343,921)** | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; **$** **164** |

---

1Pioneer High Income Fund, Inc. \| 12/31/25

------

---

| | | |
|:---|:---|:---|
| &nbsp;&nbsp;**Face<br> Amount<br> USD ($)** |  | **Value** |
|  | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;**Insurance-Linked Securities—18.9% of<br> Net Assets#** |  |
|  | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;**Collateralized Reinsurance — 2.4%** |  |
|  | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;**Multiperil – Worldwide — 2.4%** |  |
| 250,000(a)(b)+ | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Epsom Re 2025, 12/31/30 | $256939 |
|  | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;**Total Collateralized Reinsurance** | &nbsp;&nbsp;&nbsp;&nbsp; **$** **256939** |
|  | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;**Reinsurance Sidecars — 16.5%** |  |
|  | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;**Multiperil – Worldwide — 16.5%** |  |
| 40,466(a)(c)+ | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Alturas Re 2022-2, 12/31/27 | $1421 |
| 750,000(a)(b)+ | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Gleneagles Re 2022, 12/31/27 | &nbsp;&nbsp; 88500 |
| 645(a)(b)+ | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Sector Re V, 12/1/28 (144A) | &nbsp;&nbsp;&nbsp;&nbsp; — |
| 1,290(a)(b)+ | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Sector Re V, 12/1/28 (144A) | &nbsp;&nbsp;&nbsp;&nbsp; — |
| 1,014(a)(b)+ | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Sector Re V, 12/1/29 (144A) | &nbsp;&nbsp; 434947 |
| 1,500,000(a)(c)+ | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Thopas Re 2022, 12/31/27 | &nbsp;&nbsp;&nbsp;&nbsp; — |
| 1,596,147(a)(c)+ | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Thopas Re 2023, 12/31/28 | &nbsp;&nbsp; 4150 |
| 1,596,147(a)(c)+ | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Thopas Re 2024, 12/31/29 | &nbsp;&nbsp; 9417 |
| 1,000,000(a)(c)+ | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Thopas Re 2025, 12/31/30 | &nbsp;&nbsp; 1226900 |
|  |  | &nbsp;&nbsp; $1765335 |
|  | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;**Total Reinsurance Sidecars** | &nbsp;&nbsp; **$** **1765335** |
|  | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;**Total Insurance-Linked Securities<br> (Cost $1,495,996)** | &nbsp;&nbsp; **$** **2022274** |

---

---

| | | |
|:---|:---|:---|
| &nbsp;&nbsp;**Principal<br> Amount<br> USD ($)** |  |  |
|  | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;**Foreign Government Bond — 2.3% of<br> Net Assets** |  |
|  | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;**Russia — 2.3%** |  |
| 382,800(d)# | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Russian Government International Bond, 7.500%, 3/31/30 | $249120 |
|  | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;**Total Russia** | &nbsp;&nbsp;&nbsp;&nbsp; **$** **249120** |
|  | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;**Total Foreign Government Bond<br> (Cost $333,483)** | &nbsp;&nbsp;&nbsp;&nbsp; **$** **249120** |

---

Pioneer High Income Fund, Inc. \| 12/31/252

------

(unaudited) (continued)

---

| | | |
|:---|:---|:---|
| &nbsp;&nbsp;**Shares** |  | **Value** |
|  | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;**SHORT TERM INVESTMENTS — 78.7% of Net<br> Assets** |  |
|  | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;**Open-End Fund — 78.7%** |  |
| 8,444,658(e) | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Dreyfus Government Cash Management,<br> Institutional Shares, 3.65% | $8444658 |
|  |  | &nbsp;&nbsp; $8444658 |
|  | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;**TOTAL SHORT TERM INVESTMENTS<br> (Cost $8,444,658)** | &nbsp;&nbsp; **$** **8444658** |
|  | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;**TOTAL INVESTMENTS IN UNAFFILIATED ISSUERS — 100.1%<br> (Cost $12,430,874)** | **$10738931** |
|  | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;**OTHER ASSETS AND LIABILITIES — (0.1)%** | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; $(9780) |
|  | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;**net assets — 100.0%** | **$10729151** |

---

(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 December 31, 2025, the value
of these securities amounted to $434,947, or 4.1% of net assets.

---

| | |
|:---|:---|
| (a) | &nbsp;&nbsp;Non-income producing security. |
| (b) | &nbsp;&nbsp;Issued as participation notes. |
| (c) | &nbsp;&nbsp;Issued as preference shares. |
| (d) | &nbsp;&nbsp;Security is in default. |
| (e) | &nbsp;&nbsp;Rate periodically changes. Rate disclosed is the 7-day yield at December 31, 2025. |
| \* | &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. Information shown in the Schedule of Investments reflects remaining investments held by the Fund at December 31, 2025. |
| † | &nbsp;&nbsp;Amount rounds to less than 0.1%. |
| + | &nbsp;&nbsp;Security is valued using significant unobservable inputs (Level 3). |
| # | &nbsp;&nbsp;Securities are restricted as to resale. |

---

---

| | | | |
|:---|:---|:---|:---|
| &nbsp;&nbsp;**Restricted Securities** | **Acquisition date** | &nbsp;&nbsp;&nbsp;&nbsp;**Cost** | &nbsp;&nbsp;&nbsp;&nbsp;**Value** |
| &nbsp;&nbsp;Alturas Re 2022-2 | 4/11/2023 | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;$— | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;$1421 |
| &nbsp;&nbsp;Epsom Re 2025 | 4/16/2025 | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;205750 | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;256939 |
| &nbsp;&nbsp;Gleneagles Re 2022 | 1/18/2022 | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;289232 | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;88500 |
| &nbsp;&nbsp;Russian Government International Bond | 6/26/2002 | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;333483 | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;249120 |
| &nbsp;&nbsp;Sector Re V | 12/4/2023 | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;— | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;— |
| &nbsp;&nbsp;Sector Re V | 12/29/2023 | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;— | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;— |
| &nbsp;&nbsp;Sector Re V | 12/31/2024 | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;1014 | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;434947 |
| &nbsp;&nbsp;Thopas Re 2022 | 2/7/2022 | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;— | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;— |
| &nbsp;&nbsp;Thopas Re 2023 | 2/15/2023 | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;— | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;4150 |

---

3Pioneer High Income Fund, Inc. \| 12/31/25

------

---

| | | | |
|:---|:---|:---|:---|
| &nbsp;&nbsp;**Restricted Securities** | **Acquisition date** | &nbsp;&nbsp;&nbsp;&nbsp;**Cost** | &nbsp;&nbsp;&nbsp;&nbsp;**Value** |
| &nbsp;&nbsp;Thopas Re 2024 | 2/2/2024 | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;$— | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;$9417 |
| &nbsp;&nbsp;Thopas Re 2025 | 1/10/2025 | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;1000000 | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;1226900 |
| &nbsp;&nbsp;**Total Restricted Securities** |  |  | &nbsp;&nbsp;&nbsp;&nbsp;$2271394 |
| &nbsp;&nbsp;**% of Net assets** |  |  | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;21.2% |

---

Principal amounts are denominated in U.S. dollars ("USD") unless otherwise noted.

IDR — Indonesian Rupiah

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 December 31, 2025 in valuing the Fund's investments:

---

| | | | | |
|:---|:---|:---|:---|:---|
|  | **Level 1** | &nbsp;&nbsp;**Level 2** | &nbsp;&nbsp;**Level 3** | &nbsp;&nbsp;**Total** |
| Common Stocks |  |  |  |  |
| &nbsp;&nbsp;&nbsp;Commercial Services & Supplies | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;$— | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;$— | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;$—\* | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;$—\* |
| &nbsp;&nbsp;&nbsp;Oil, Gas & Consumable Fuels | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;— | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;1044 | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;— | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;1044 |
| Convertible Corporate Bonds | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;— | &nbsp;&nbsp;&nbsp;&nbsp;21671 | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;— | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;21671 |
| Corporate Bonds |  |  |  |  |
| &nbsp;&nbsp;&nbsp;Pharmaceuticals | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;— | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;— | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;—\* | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;—\* |
| &nbsp;&nbsp;&nbsp;All Other Corporate Bonds | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;— | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;164 | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;— | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;164 |
| Insurance-Linked Securities |  |  |  |  |
| &nbsp;&nbsp;&nbsp;Collateralized Reinsurance |  |  |  |  |
| &nbsp;&nbsp;&nbsp;&nbsp;Multiperil – Worldwide | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;— | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;— | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;256939 | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;256939 |
| &nbsp;&nbsp;&nbsp;Reinsurance Sidecars |  |  |  |  |
| &nbsp;&nbsp;&nbsp;&nbsp;Multiperil – Worldwide | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;— | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;— | &nbsp;&nbsp;&nbsp;1765335 | &nbsp;&nbsp;&nbsp;&nbsp;1765335 |
| Foreign Government Bond | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;— | &nbsp;&nbsp;&nbsp;249120 | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;— | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;249120 |
| Open-End Fund | &nbsp;&nbsp;&nbsp;8444658 | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;— | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;— | &nbsp;&nbsp;&nbsp;&nbsp;8444658 |
| **Total Investments in Securities** | **$8444658** | &nbsp;&nbsp;**$271999** | &nbsp;&nbsp;**$2022274** | &nbsp;&nbsp;**$10738931** |

---

\* Securities valued at $0.

Pioneer High Income Fund, Inc. \| 12/31/254

------

(unaudited) (continued)

The following is a reconciliation of assets valued using significant unobservable inputs (Level 3):

---

| | | | | |
|:---|:---|:---|:---|:---|
|  | **Common<br> Stocks** | &nbsp;&nbsp;**Corporate<br> Bonds** | &nbsp;&nbsp;**Insurance-<br> Linked<br> Securities** | &nbsp;&nbsp;**Total** |
| Balance as of 3/31/25 | $0\*\* | &nbsp;&nbsp;&nbsp;&nbsp;$0\*\* | &nbsp;&nbsp;$7429295 | &nbsp;&nbsp;$7429295 |
| Realized gain (loss) | &nbsp;&nbsp;&nbsp;&nbsp;— | &nbsp;&nbsp;&nbsp;&nbsp;1171 | &nbsp;&nbsp;&nbsp;&nbsp;(122230) | &nbsp;&nbsp;&nbsp;&nbsp;(121059) |
| Changed in unrealized appreciation (depreciation) | &nbsp;&nbsp;0\*\* | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;— | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;825184 | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;825184 |
| Return of capital | &nbsp;&nbsp;&nbsp;&nbsp;— | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;— | &nbsp;&nbsp;&nbsp;&nbsp;(797620) | &nbsp;&nbsp;&nbsp;&nbsp;(797620) |
| Purchases | &nbsp;&nbsp;&nbsp;&nbsp;— | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;— | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;205750 | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;205750 |
| Sales | &nbsp;&nbsp;&nbsp;&nbsp;— | &nbsp;&nbsp;&nbsp;(1171) | &nbsp;&nbsp;&nbsp;(5518105) | &nbsp;&nbsp;&nbsp;(5519276) |
| Transfers in to Level 3\* | &nbsp;&nbsp;&nbsp;&nbsp;— | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;— | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;— | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;— |
| Transfers out of Level 3\* | &nbsp;&nbsp;&nbsp;&nbsp;— | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;— | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;— | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;— |
| **Balance as of 12/31/25** | **$0\*\*** | &nbsp;&nbsp;&nbsp;&nbsp;**$0\*\*** | &nbsp;&nbsp;**$2022274** | &nbsp;&nbsp;**$2022274** |

---

---

| | | |
|:---|:---|:---|
| \* | &nbsp;&nbsp;Transfers are calculated on the beginning of period values. During the period ended December 31, 2025, there were no transfers in or out of Level 3. | &nbsp;&nbsp;Transfers are calculated on the beginning of period values. During the period ended December 31, 2025, there were no transfers in or out of Level 3. |
| \*\* | &nbsp;&nbsp;Securities valued at $0. |  |
| Net change in unrealized appreciation (depreciation) of Level 3 investments still held and considered Level 3 at December 31, 2025: | Net change in unrealized appreciation (depreciation) of Level 3 investments still held and considered Level 3 at December 31, 2025: | &nbsp;&nbsp;$751419 |

---

5Pioneer High Income Fund, Inc. \| 12/31/25

## 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 High Income Fund, Inc.

- **b. Investment Company Act file number:** 811-21043

- **c. CIK number of Registrant:** 0001166258

- **d. LEI of Registrant:** 5493001GCNPC0XWPCF03

- **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 High Income Fund, Inc.

- **c. LEI of Series:** 5493001GCNPC0XWPCF03

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

- **a. Date of fiscal year-end:** 2026-03-31

- **b. Date as of which information is reported:** 2025-12-31

**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:** $10800242.15

**Total Liabilities:** $71340.16

**Net Assets:** $10728901.99

**Cash Not Reported:** $13484.66

**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:** 0.00000000 | **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                    | $78243.41                                  |
| Month 2  | $523.19                  | $279056.91                                 |
| Month 3  | $626536.97               | $-1077349.24                               |

**Designated Index Information**

- **Index Name:** ICE BofA US High Yield

- **Index Identifier:** N/A

### 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   |
|:---|:---|:---|:---|:---|:---|:---|---:|:---|:---|:---|:---|:---|:---|:---|---:|:---|
| SECTOR RE V LTD                    | Sector Re V Ltd                    | CUSIP: 81369AES7<br>LEI: 549300QS6XPZQHTCEJ97 | Long             | DBT              | CORP              | BM        |    1500000 | PA      | $1934850.00   | 18.03%            | 2029-12-01      | None          | 0.00%                 | Yes           |                  3 | On Loan: No      |
| Thopas Re 2022                     | Thopas Re 2022                     | CUSIP: 000000000<br>LEI: N/A                  | Long             | DBT              | CORP              | BM        |    1500000 | PA      | $0.00         | 0.00%             | 2027-12-31      | None          | 0.00%                 | Yes           |                  3 | On Loan: No      |
| THOPAS RE 2025                     | THOPAS RE 2025                     | CUSIP: 000000000<br>LEI: N/A                  | Long             | DBT              | CORP              | BM        |    1000000 | PA      | $1226900.00   | 11.44%            | 2030-12-31      | None          | 0.00%                 | Yes           |                  3 | On Loan: No      |
| SECTOR RE V LTD                    | Sector Re V Ltd                    | CUSIP: 81369AEM0<br>LEI: 549300QS6XPZQHTCEJ97 | Long             | DBT              | CORP              | BM        |        645 | PA      | $0.00         | 0.00%             | 2028-12-01      | None          | 0.00%                 | Yes           |                  3 | On Loan: No      |
| PETROQUEST ENERGY INC              | PETROQUEST ENERGY INC              | CUSIP: 000000000<br>LEI: N/A                  | Long             | EC               | CORP              | US        |       8027 | NS      | $1043.51      | 0.01%             |  |  |  | No            |                  2 | On Loan: No      |
| Gleneagles Re 2022                 | Gleneagles Re 2022                 | CUSIP: 000000000<br>LEI: N/A                  | Long             | DBT              | CORP              | BM        |     750000 | PA      | $88500.00     | 0.82%             | 2027-12-31      | None          | 0.00%                 | Yes           |                  3 | On Loan: No      |
| PT Bakrie & Brothers TBK           | PT Bakrie & Brothers TBK           | CUSIP: 000000000<br>LEI: N/A                  | Long             | DBT              | CORP              | ID        | 1422679000 | PA      | $21670.79     | 0.20%             | 2026-06-30      | None          | 0.00%                 | No            |                  2 | On Loan: No      |
| RUSSIAN FEDERATION                 | Russian Foreign Bond - Eurobond    | CUSIP: 000000000<br>LEI: 5493004EHVGF71PDBU58 | Long             | DBT              | NUSS              | RU        |     382800 | PA      | $249120.94    | 2.32%             | 2030-03-31      | Variable      | 7.50%                 | Yes           |                  2 | On Loan: No      |
| SECTOR RE V LTD                    | Sector Re V Ltd                    | CUSIP: 81369AEN8<br>LEI: 549300QS6XPZQHTCEJ97 | Long             | DBT              | CORP              | BM        |       1290 | PA      | $0.00         | 0.00%             | 2028-12-01      | None          | 0.00%                 | Yes           |                  3 | On Loan: No      |
| EPSOM RE 2025                      | EPSOM RE 2025                      | CUSIP: 000000000<br>LEI: N/A                  | Long             | DBT              | CORP              | BM        |     250000 | PA      | $256939.73    | 2.39%             | 2030-12-31      | None          | 0.00%                 | Yes           |                  3 | On Loan: No      |
| TRICIDA INC                        | TRICIDA INC                        | CUSIP: 000000000<br>LEI: N/A                  | Long             | DBT              | CORP              | US        |    1300000 | PA      | $0.01         | 0.00%             | 2027-05-15      | Fixed         | 0.00%                 | No            |                  3 | On Loan: No      |
| THOPAS RE 2024                     | THOPAS RE 2024                     | CUSIP: 000000000<br>LEI: N/A                  | Long             | DBT              | CORP              | BM        |    1596147 | PA      | $9417.27      | 0.09%             | 2029-12-31      | None          | 0.00%                 | Yes           |                  3 | On Loan: No      |
| CREDITO REAL SAB DE CV SOFOM ER    | CREDITO REAL SAB DE CV SOFOM ER    | CUSIP: 000000000<br>LEI: N/A                  | Long             | DBT              | CORP              | MX        |    1500000 | PA      | $150.00       | 0.00%             | 2026-02-07      | Fixed         | 9.50%                 | No            |                  2 | On Loan: No      |
| CREDITO REAL SAB DE CV SOFOM ER    | CREDITO REAL SAB DE CV SOFOM ER    | CUSIP: 000000000<br>LEI: N/A                  | Long             | DBT              | CORP              | MX        |     140000 | PA      | $14.00        | 0.00%             | 2028-01-21      | Fixed         | 8.00%                 | No            |                  2 | On Loan: No      |
| Dreyfus Government Cash Management | Dreyfus Government Cash Management | CUSIP: 262006208<br>LEI: 5493000Q69I5Q3QZIA91 | Long             | STIV             | RF                | US        |    6980442 | NS      | $6980442.13   | 65.06%            |  |  |  | No            |                  1 | On Loan: No      |
| Alturas Re 2022-2, 12/31/2027      | Alturas Re 2022-2, 12/31/2027      | CUSIP: 000000000<br>LEI: N/A                  | Long             | DBT              | CORP              | BM        |      40466 | PA      | $1420.36      | 0.01%             | 2027-12-31      | None          | 0.00%                 | Yes           |                  3 | On Loan: No      |
| THOPAS RE 2023                     | THOPAS RE 2023                     | CUSIP: 000000000<br>LEI: N/A                  | Long             | DBT              | CORP              | BM        |    1596147 | PA      | $4149.98      | 0.04%             | 2028-12-31      | None          | 0.00%                 | Yes           |                  3 | On Loan: No      |
| Atento Luxco 1 SA                  | Atento Luxco 1 SA                  | CUSIP: 000000000<br>LEI: 549300MLFF3HYCZQTC48 | Long             | EC               | CORP              | LU        |     251944 | NS      | $0.03         | 0.00%             |  |  |  | No            |                  3 | On Loan: No      |
| TRICIDA INC                        | TRICIDA INC                        | CUSIP: 000000000<br>LEI: N/A                  | Long             | DBT              | CORP              | US        |    1300000 | PA      | $0.01         | 0.00%             | 2027-05-15      | Fixed         | 0.00%                 | No            |                  3 | On Loan: No      |

### Signature

**Date Signed:** 2026-02-24

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

**Signature:** Carol Trevino

**Name of Signer:** Carol Trevino

**Title:** Treasurer