# EDGAR Filing Document

**Accession Number:** 0000225635
**File Stem:** 0001410368-25-017829
**Filing Date:** 2025-10
**Character Count:** 51093
**Document Hash:** 2a4971437231e077bc827486ac74feff
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001410368-25-017829.hdr.sgml**: 20251027

**ACCESSION NUMBER**: 0001410368-25-017829

**CONFORMED SUBMISSION TYPE**: NPORT-P

**PUBLIC DOCUMENT COUNT**: 2

**CONFORMED PERIOD OF REPORT**: 20250831

**FILED AS OF DATE**: 20251027

**DATE AS OF CHANGE**: 20251027

**PERIOD START**: 20260531

**FILER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** BLACKROCK MUNICIPAL BOND FUND, INC.
- **CENTRAL INDEX KEY:** 0000225635

**ORGANIZATION NAME:**
- **EIN:** 132896246
- **STATE OF INCORPORATION:** NJ
- **FISCAL YEAR END:** 0630

**FILING VALUES:**
- **FORM TYPE:** NPORT-P
- **SEC ACT:** 1940 Act
- **SEC FILE NUMBER:** 811-02688
- **FILM NUMBER:** 251418907

**BUSINESS ADDRESS:**
- **STREET 1:** 100 BELLEVUE PARKWAY
- **CITY:** WILMINGTON
- **STATE:** DE
- **ZIP:** 19809
- **BUSINESS PHONE:** 800-441-7762

**MAIL ADDRESS:**
- **STREET 1:** 100 BELLEVUE PARKWAY
- **CITY:** WILMINGTON
- **STATE:** DE
- **ZIP:** 19809

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** MERRILL LYNCH MUNICIPAL BOND FUND INC
- **DATE OF NAME CHANGE:** 19920703

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** ONE LIBERTY MUNICIPAL BOND FUND INC
- **DATE OF NAME CHANGE:** 19780622

## Series and Classes Contracts Data

### BlackRock Impact Municipal Fund (Series ID: S000075512)

| Class ID   | Class Name    | Ticker Symbol   |
|:---|:---|:---|
| C000234660 | Investor A    |  |
| C000234661 | Institutional |  |
| C000234662 | Class K       |  |

## Nport-Ex

August 31, 2025

2025 Quarterly Report <br>&nbsp;&nbsp;&nbsp;&nbsp;(Unaudited)<br>

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;

---

| |
|:---|
| **BlackRock Municipal Bond Fund, Inc.** |
| • BlackRock Impact Municipal Fund |

---

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;

**Not FDIC Insured • May Lose Value • No Bank Guarantee**<br>

------

Schedule of Investments (unaudited)

August 31, 2025

**BlackRock Impact Municipal Fund** 

**(Percentages shown are based on Net Assets)**

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;

---

| | | |
|:---|:---|:---|
| *Security* | *Par* <br>*(000)*<br>| *Value* |
| **Municipal Bonds** | **Municipal Bonds** | **Municipal Bonds** |
| **Alaska — 2.6%** | **Alaska — 2.6%** |  |
| &nbsp;&nbsp;&nbsp; Alaska Housing Finance Corp., RB, S/F Housing, Series A, <br> VRDN, 2.68%, 09/07/25<sup>(a)</sup><br>| $1200 | &nbsp;&nbsp; $1200000 |
| **Arizona — 0.3%** | **Arizona — 0.3%** |  |
| &nbsp;&nbsp;&nbsp; Arizona Industrial Development Authority, RB, 5.25%, <br> 07/01/43<sup>(b)</sup><br>| 150 | &nbsp;&nbsp; 142859 |
| **Arkansas — 2.4%** | **Arkansas — 2.4%** |  |
| &nbsp;&nbsp;&nbsp; Arkansas Development Finance Authority, RB, AMT, <br> Sustainability Bonds, 5.70%, 05/01/53<br>| 100 | &nbsp;&nbsp; 99780 |
| University of Arkansas, RB, Series A, 5.00%, 04/01/47 | 1000 | &nbsp;&nbsp; 1011666 |
|  |  | &nbsp;&nbsp; 1111446 |
| **California — 10.3%** | **California — 10.3%** |  |
| California Community Choice Financing Authority, RB<sup>(c)</sup> <br>|  |  |
| &nbsp;&nbsp;&nbsp; 5.00%, 05/01/54 | 1440 | &nbsp;&nbsp; 1538297 |
| &nbsp;&nbsp;&nbsp; Series C, Sustainability Bonds, 5.00%, 08/01/55 | 150 | &nbsp;&nbsp; 159167 |
| &nbsp;&nbsp;&nbsp; California Infrastructure & Economic Development Bank, RB, <br> 5.00%, 05/15/45<br>| 1000 | &nbsp;&nbsp; 1039034 |
| &nbsp;&nbsp;&nbsp; California Infrastructure & Economic Development Bank, <br> Refunding RB, Series A, Class B, AMT, Sustainability <br> Bonds, 9.50%, 01/01/65<sup>(b)(c)</sup><br>| 485 | &nbsp;&nbsp; 443781 |
| California School Finance Authority, RB, 5.00%, 08/01/42<sup>(b)</sup> | 125 | &nbsp;&nbsp; 119819 |
| &nbsp;&nbsp;&nbsp; California State Public Works Board, RB, Series D, <br> Sustainability Bonds, 4.00%, 05/01/45<br>| 1000 | &nbsp;&nbsp; 911986 |
| &nbsp;&nbsp;&nbsp; CSCDA Community Improvement Authority, RB, M/F <br> Housing<sup>(b)</sup> <br>|  |  |
| &nbsp;&nbsp;&nbsp; 3.25%, 04/01/57 | 250 | &nbsp;&nbsp; 173734 |
| &nbsp;&nbsp;&nbsp; Series A-2, Sustainability Bonds, 3.00%, 02/01/57 | 350 | &nbsp;&nbsp; 226121 |
| &nbsp;&nbsp;&nbsp; San Joaquin Valley Clean Energy Authority, RB, Series A, <br> Sustainability Bonds, 5.50%, 01/01/56<sup>(c)</sup><br>| 140 | &nbsp;&nbsp; 154968 |
|  |  | &nbsp;&nbsp; 4766907 |
| **Colorado — 4.3%** | **Colorado — 4.3%** |  |
| &nbsp;&nbsp;&nbsp; Colorado Health Facilities Authority, Series D, VRDN, 3.85%, <br> 09/04/25<sup>(a)</sup><br>| 1200 | &nbsp;&nbsp; 1200000 |
| &nbsp;&nbsp;&nbsp; Colorado School of Mines, RB, Series A, Sustainability <br> Bonds, (AGM), 5.25%, 12/01/47<br>| 290 | &nbsp;&nbsp; 295743 |
| &nbsp;&nbsp;&nbsp; Denver City & County School District No. 1, GO, Series A, <br> (SAW), 5.00%, 12/01/45<br>| 500 | &nbsp;&nbsp; 511308 |
|  |  | &nbsp;&nbsp; 2007051 |
| **Connecticut — 5.2%** | **Connecticut — 5.2%** |  |
| &nbsp;&nbsp;&nbsp; Connecticut Housing Finance Authority, RB, S/F Housing, <br> Series B-4, VRDN, (FHLMC, FNMA, GNMA), 2.77%, <br> 09/07/25<sup>(a)</sup><br>| 1180 | &nbsp;&nbsp; 1180000 |
| &nbsp;&nbsp;&nbsp; Connecticut State Health & Educational Facilities Authority, <br> RB, 5.25%, 07/15/48<br>| 180 | &nbsp;&nbsp; 183065 |
| &nbsp;&nbsp;&nbsp; State of Connecticut, GO, Series B, Sustainability Bonds, <br> 5.00%, 01/15/42<br>| 1000 | &nbsp;&nbsp; 1042022 |
|  |  | &nbsp;&nbsp; 2405087 |
| **District of Columbia — 2.9%** | **District of Columbia — 2.9%** |  |
| &nbsp;&nbsp;&nbsp; District of Columbia, RB, Class A, AMT, Sustainability Bonds, <br> 5.50%, 02/28/34<br>| 1000 | &nbsp;&nbsp; 1115984 |
| &nbsp;&nbsp;&nbsp; Washington Metropolitan Area Transit Authority Dedicated <br> Revenue, RB, Series A, Sustainability Bonds, 4.13%, <br> 07/15/47<br>| 250 | &nbsp;&nbsp; 218807 |
|  |  | &nbsp;&nbsp; 1334791 |
| **Florida — 6.6%** | **Florida — 6.6%** |  |
| &nbsp;&nbsp;&nbsp; Brevard County Health Facilities Authority, Refunding RB, <br> Series A, 4.00%, 04/01/52<br>| 1000 | &nbsp;&nbsp; 807957 |

---

---

| | | |
|:---|:---|:---|
| *Security* | *Par*<br> *(000)*<br>| *Value* |
| **Florida (continued)** | **Florida (continued)** |  |
| Florida Development Finance Corp., RB |  |  |
| &nbsp;&nbsp;&nbsp; Series A, 4.00%, 06/15/42 | 500 | &nbsp;&nbsp; $427944 |
| &nbsp;&nbsp;&nbsp; Series A, 5.00%, 06/15/47 | 375 | &nbsp;&nbsp; 345200 |
| &nbsp;&nbsp;&nbsp; St Lucie County School Board, COP, Series A, (AGM), <br> 5.00%, 07/01/48<br>| 1500 | &nbsp;&nbsp; 1497581 |
|  |  | &nbsp;&nbsp; 3078682 |
| **Illinois — 2.5%** | **Illinois — 2.5%** |  |
| &nbsp;&nbsp;&nbsp; Chicago Transit Authority Sales Tax Receipts Fund, <br> Refunding RB, Series A, 2nd Lien, 5.00%, 12/01/57<br>| 1200 | &nbsp;&nbsp; 1167786 |
| **Kentucky — 2.1%** | **Kentucky — 2.1%** |  |
| &nbsp;&nbsp;&nbsp; Louisville/Jefferson County Metropolitan Government, RB, <br> Series A, (AGM), 5.00%, 05/15/47<br>| 1000 | &nbsp;&nbsp; 983148 |
| **Louisiana — 2.6%** | **Louisiana — 2.6%** |  |
| &nbsp;&nbsp;&nbsp; Jefferson Parish Consolidated Sewerage District No. 1, RB, <br> (BAM), 4.00%, 02/01/39<br>| 1000 | &nbsp;&nbsp; 969216 |
| &nbsp;&nbsp;&nbsp; Louisiana Public Facilities Authority, RB, Series A, 6.38%, <br> 06/01/52<sup>(b)</sup><br>| 250 | &nbsp;&nbsp; 228733 |
|  |  | &nbsp;&nbsp; 1197949 |
| **Maryland — 1.5%** | **Maryland — 1.5%** |  |
| &nbsp;&nbsp;&nbsp; Maryland Economic Development Corp., RB, Class B, AMT, <br> Sustainability Bonds, 5.25%, 06/30/47<br>| 715 | &nbsp;&nbsp; 693832 |
| **Massachusetts — 8.5%** | **Massachusetts — 8.5%** |  |
| &nbsp;&nbsp;&nbsp; Commonwealth of Massachusetts Transportation Fund <br> Revenue, RB, Sustainability Bonds, 5.00%, 06/01/50<br>| 1500 | &nbsp;&nbsp; 1506218 |
| &nbsp;&nbsp;&nbsp; Massachusetts Clean Water Trust, RB, Series 26B, <br> Sustainability Bonds, 5.00%, 02/01/45<br>| 1500 | &nbsp;&nbsp; 1558208 |
| &nbsp;&nbsp;&nbsp; University of Massachusetts Building Authority, RB, Series 1, <br> 4.00%, 11/01/46<br>| 1000 | &nbsp;&nbsp; 875979 |
|  |  | &nbsp;&nbsp; 3940405 |
| **Michigan — 5.1%** | **Michigan — 5.1%** |  |
| &nbsp;&nbsp;&nbsp; Ludington Area School District, GO, Series II, (BAM Q-SBLF), <br> 4.00%, 05/01/51<br>| 1000 | &nbsp;&nbsp; 847928 |
| Michigan Finance Authority, RB |  |  |
| &nbsp;&nbsp;&nbsp; 4.00%, 02/15/47 | 500 | &nbsp;&nbsp; 420119 |
| &nbsp;&nbsp;&nbsp; Sustainability Bonds, 5.50%, 02/28/57 | 110 | &nbsp;&nbsp; 110337 |
| &nbsp;&nbsp;&nbsp; Michigan State Housing Development Authority, RB, M/F <br> Housing, Series A, 5.10%, 10/01/53<br>| 1000 | &nbsp;&nbsp; 996544 |
|  |  | &nbsp;&nbsp; 2374928 |
| **Minnesota — 1.1%** | **Minnesota — 1.1%** |  |
| &nbsp;&nbsp;&nbsp; Duluth Economic Development Authority, RB, Class B, <br> 5.25%, 06/15/42<br>| 500 | &nbsp;&nbsp; 517373 |
| **New Hampshire — 1.5%** | **New Hampshire — 1.5%** |  |
| &nbsp;&nbsp;&nbsp; New Hampshire Business Finance Authority, RB, M/F <br> Housing, Series 2022-1, Sustainability Bonds, 4.38%, <br> 09/20/36<br>| 719 | &nbsp;&nbsp; 697420 |
| **New Jersey — 0.3%** | **New Jersey — 0.3%** |  |
| &nbsp;&nbsp;&nbsp; Camden County Improvement Authority, RB, Sustainability <br> Bonds, 6.00%, 06/15/47<br>| 115 | &nbsp;&nbsp; 119337 |
| **New York — 17.8%** | **New York — 17.8%** |  |
| Build NYC Resource Corp., RB |  |  |
| &nbsp;&nbsp;&nbsp; Series A, 5.00%, 07/01/32 | 245 | &nbsp;&nbsp; 243783 |
| &nbsp;&nbsp;&nbsp; Series A, 5.13%, 07/01/33 | 175 | &nbsp;&nbsp; 191827 |
| &nbsp;&nbsp;&nbsp; Metropolitan Transportation Authority, Refunding RB, <br> Series A-1, Sustainability Bonds, 5.00%, 11/15/49<br>| 1000 | &nbsp;&nbsp; 965762 |
| &nbsp;&nbsp;&nbsp; Nassau County Local Economic Assistance Corp., RB, <br> Series A, 5.00%, 07/01/43<br>| 1000 | &nbsp;&nbsp; 1008024 |
| New York City Housing Development Corp., RB, M/F Housing |  |  |
| &nbsp;&nbsp;&nbsp; Class F-1, Sustainability Bonds, 4.75%, 11/01/47 | 1000 | &nbsp;&nbsp; 950350 |

---

------

Schedule of Investments (unaudited)(continued)

August 31, 2025

**BlackRock Impact Municipal Fund** 

**(Percentages shown are based on Net Assets)**

---

| | | |
|:---|:---|:---|
| *Security* | *Par*<br> *(000)*<br>| *Value* |
| **New York (continued)** | **New York (continued)** |  |
| &nbsp;&nbsp;&nbsp; New York City Housing Development Corp., RB, M/F <br> Housing (continued)<br>|  |  |
| &nbsp;&nbsp;&nbsp; Series A, Sustainability Bonds, 4.60%, 11/01/43 | 225 | &nbsp;&nbsp; $216285 |
| &nbsp;&nbsp;&nbsp; New York City Municipal Water Finance Authority, RB, <br> Series BB, VRDN, 4.00%, 09/04/25<sup>(a)</sup><br>| 1200 | &nbsp;&nbsp; 1200000 |
| &nbsp;&nbsp;&nbsp; New York Power Authority, RB, Sustainability Bonds, (AGM), <br> 4.00%, 11/15/42<br>| 1000 | &nbsp;&nbsp; 938202 |
| &nbsp;&nbsp;&nbsp; New York State Housing Finance Agency, RB, M/F Housing, <br> Seires A, Sustainability Bonds, (SONYMA HUD SECT 8), <br> 3.80%, 11/01/62<sup>(c)</sup><br>| 735 | &nbsp;&nbsp; 735021 |
| New York Transportation Development Corp., RB |  |  |
| &nbsp;&nbsp;&nbsp; AMT, Sustainability Bonds, (AGM), 5.50%, 06/30/44 | 500 | &nbsp;&nbsp; 510233 |
| &nbsp;&nbsp;&nbsp; AMT, Sustainability Bonds, 5.25%, 06/30/49 | 550 | &nbsp;&nbsp; 525913 |
| &nbsp;&nbsp;&nbsp; New York Transportation Development Corp., Refunding RB, <br> Series A, AMT, Sustainability Bonds, (AGM), 5.25%, <br> 12/31/54<br>| 810 | &nbsp;&nbsp; 794294 |
|  |  | &nbsp;&nbsp; 8279694 |
| **Ohio — 2.6%** | **Ohio — 2.6%** |  |
| &nbsp;&nbsp;&nbsp; Ohio Water Development Authority Water Pollution Control <br> Loan Fund, Series C, VRDN, 3.90%, 09/04/25<sup>(a)</sup><br>| 1200 | &nbsp;&nbsp; 1200000 |
| **Oregon — 0.9%** | **Oregon — 0.9%** |  |
| &nbsp;&nbsp;&nbsp; Port of Portland Oregon Airport Revenue, Refunding ARB, <br> Series 29, AMT, Sustainability Bonds, 5.50%, 07/01/48<br>| 410 | &nbsp;&nbsp; 422057 |
| **Pennsylvania — 4.9%** | **Pennsylvania — 4.9%** |  |
| &nbsp;&nbsp;&nbsp; City of Philadelphia Pennsylvania Water & Wastewater <br> Revenue, RB, Series C, 5.50%, 06/01/47<br>| 1000 | &nbsp;&nbsp; 1032507 |
| &nbsp;&nbsp;&nbsp; Pittsburgh Water & Sewer Authority, RB, Series A, 1st Lien, <br> (AGM), 5.00%, 09/01/48<br>| 225 | &nbsp;&nbsp; 226585 |
| &nbsp;&nbsp;&nbsp; Southeastern Pennsylvania Transportation Authority, RB, <br> 5.25%, 06/01/47<br>| 1000 | &nbsp;&nbsp; 1028435 |
|  |  | &nbsp;&nbsp; 2287527 |
| **Texas — 10.2%** | **Texas — 10.2%** |  |
| &nbsp;&nbsp;&nbsp; Arlington Higher Education Finance Corp., RB, (PSF), 5.00%, <br> 08/15/47<br>| 500 | &nbsp;&nbsp; 503198 |
| &nbsp;&nbsp;&nbsp; City of El Paso Texas Water & Sewer Revenue, Refunding <br> RB, 5.00%, 03/01/46<br>| 1000 | &nbsp;&nbsp; 1008832 |

---

---

| | | |
|:---|:---|:---|
| *Security* | *Par*<br> *(000)*<br>| *Value* |
| **Texas (continued)** | **Texas (continued)** |  |
| State of Texas, GO, VRDN, 2.77%, 09/07/25<sup>(a)</sup> | 1000 | &nbsp;&nbsp; $1000000 |
| &nbsp;&nbsp;&nbsp; Tarrant County Cultural Education Facilities Finance Corp., <br> Refunding RB, 5.00%, 12/01/45<br>| 1500 | &nbsp;&nbsp; 1525411 |
| Texas State Technical College, RB, (AGM), 5.50%, 08/01/42 | 665 | &nbsp;&nbsp; 709646 |
|  |  | &nbsp;&nbsp; 4747087 |
| **Virginia — 2.1%** | **Virginia — 2.1%** |  |
| &nbsp;&nbsp;&nbsp; Henrico County Economic Development Authority, RB, <br> Class A, 5.00%, 10/01/47<br>| 1000 | &nbsp;&nbsp; 990037 |
| **Total Long-Term Investments — 98.3%** <br>**(Cost: $47,776,217)** | **Total Long-Term Investments — 98.3%** <br>**(Cost: $47,776,217)** | &nbsp;&nbsp; 45665403 |

---

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;

---

| | | |
|:---|:---|:---|
|  | <br>*Shares*<br>|  |
| **Short-Term Securities** | **Short-Term Securities** | **Short-Term Securities** |
| **Money Market Funds — 1.0%** | **Money Market Funds — 1.0%** |  |
| &nbsp;&nbsp;&nbsp; BlackRock Liquidity Funds, MuniCash, Institutional Shares, <br> 2.73%<sup>(d)(e)</sup><br>| 435021 | &nbsp;&nbsp; 435064 |
| **Total Short-Term Securities — 1.0%** <br>**(Cost: $434,934)** | **Total Short-Term Securities — 1.0%** <br>**(Cost: $434,934)** | &nbsp;&nbsp; 435064 |
| **Total Investments — 99.3%** <br>**(Cost: $48,211,151)** | **Total Investments — 99.3%** <br>**(Cost: $48,211,151)** | &nbsp;&nbsp; 46100467 |
| **Other Assets Less Liabilities — 0.7%** | **Other Assets Less Liabilities — 0.7%** | &nbsp;&nbsp; 346387 |
| **Net Assets — 100.0%** | **Net Assets — 100.0%** | &nbsp;&nbsp; $46446854 |

---

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;

<sup>(a)</sup> Variable rate security. Rate as of period end and maturity is the date the principal owed can be recovered through demand. 

<sup>(b)</sup> Security exempt from registration pursuant to Rule 144A under the Securities Act of 1933, as amended. These securities may be resold in transactions exempt from registration to qualified institutional investors. 

<sup>(c)</sup> Variable rate security. Interest rate resets periodically. The rate shown is the effective interest rate as of period end. Security description also includes the reference rate and spread if published and available. 

<sup>(d)</sup> Affiliate of the Fund.

<sup>(e)</sup> Annualized 7-day yield as of period end.

For purposes of this report, industry and sector sub-classifications may differ from those utilized by the Fund for compliance purposes.

**Affiliates**

Investments in issuers considered to be affiliate(s) of the Fund during the period ended August 31, 2025 for purposes of Section 2(a)(3) of the Investment Company Act of 1940, as amended, were as follows:

---

| | | | | | | | | |
|:---|:---|:---|:---|:---|:---|:---|:---|:---|
| *Affiliated Issuer* | *Value at* <br>*05/31/25*<br>| *Purchases* <br>*at Cost*<br>| *Net* <br>*Realized* <br>*Gain (Loss)*<br>| *Change in* <br>*Unrealized* <br>*Appreciation* <br>*(Depreciation)*<br>| *Value at* <br>*08/31/25*<br>| *Shares* <br>*Held at* <br>*08/31/25*<br>| *Income* | *Capital Gain* <br>*Distributions* <br>*from* <br>*Underlying* <br>*Funds*<br>|
| BlackRock Liquidity Funds, MuniCash, Institutional Shares | $639621 | $—<br> $(204556 )<sup>(a)</sup><br>| &nbsp;&nbsp; $17 | $(18)<br>| $435064 | 435021 | $8392 | $— |

---

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;

<sup>(a)</sup> Represents net amount purchased (sold).

Schedule of Investments

------

Schedule of Investments (unaudited)(continued)

August 31, 2025

**BlackRock Impact Municipal Fund** 

**Fair Value Hierarchy as of Period End**

Various inputs are used in determining the fair value of financial instruments at the measurement date. These inputs to valuation techniques are categorized into a fair value hierarchy consisting of three broad levels for financial reporting purposes as follows:

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• Level 1 – Unadjusted price quotations in active markets/exchanges that the Fund has the ability to access for identical assets or liabilities;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• Level 2 – Inputs other than quoted prices included within Level 1 that are observable for the asset or liability, either directly or indirectly; and

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• Level 3 – Inputs that are unobservable and significant to the entire fair value measurement for the asset or liability (including the Valuation Committee's assumptions used in determining the fair value of financial instruments).

The hierarchy gives the highest priority to unadjusted quoted prices in active markets for identical assets or liabilities (Level 1 measurements) and the lowest priority to unobservable inputs (Level 3 measurements). Accordingly, the degree of judgment exercised in determining fair value is greatest for instruments categorized in Level 3. The inputs used to measure fair value may fall into different levels of the fair value hierarchy. In such cases, for disclosure purposes, the fair value hierarchy classification is determined based on the lowest level input that is significant to the fair value measurement in its entirety. Investments classified within Level 3 have significant unobservable inputs used by the Valuation Committee in determining the price for Fair Valued Investments. Level 3 investments include equity or debt issued by privately held companies or funds that may not have a secondary market and/or may have a limited number of investors. The categorization of a value determined for financial instruments is based on the pricing transparency of the financial instruments and is not necessarily an indication of the risks associated with investing in those securities. For information about the Fund's policy regarding valuation of financial instruments, refer to its most recent financial statements.

The following table summarizes the Fund's financial instruments categorized in the fair value hierarchy. The breakdown of the Fund's financial instruments into major categories is disclosed in the Schedule of Investments above.

---

| | | | | |
|:---|:---|:---|:---|:---|
|  | *Level 1* | *Level 2* | *Level 3* | *Total* |
| Assets |  |  |  |  |
| &nbsp;&nbsp;&nbsp; Investments  |  |  |  |  |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Long-Term Investments  |  |  |  |  |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Municipal Bonds | &nbsp;&nbsp; $— | &nbsp;&nbsp;&nbsp;&nbsp; $45665403 | &nbsp;&nbsp;&nbsp;&nbsp; $— | &nbsp;&nbsp;&nbsp;&nbsp; $45665403 |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Short-Term Securities  |  |  |  |  |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Money Market Funds | &nbsp;&nbsp; 435064 | &nbsp;&nbsp;&nbsp;&nbsp; — | &nbsp;&nbsp;&nbsp;&nbsp; — | &nbsp;&nbsp;&nbsp;&nbsp; 435064 |
|  | &nbsp;&nbsp; $435064 | &nbsp;&nbsp;&nbsp;&nbsp; $45665403 | &nbsp;&nbsp;&nbsp;&nbsp; $— | &nbsp;&nbsp;&nbsp;&nbsp; $46100467 |

---

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;

---

| | |
|:---|:---|
| **Portfolio Abbreviation**  | **Portfolio Abbreviation**  |
| AGM | Assured Guaranty Municipal Corp. |
| AMT | Alternative Minimum Tax |
| ARB | Airport Revenue Bonds  |
| BAM | Build America Mutual Assurance Co. |
| COP | Certificates of Participation |
| FHLMC | Federal Home Loan Mortgage Corp. |
| FNMA | Federal National Mortgage Association |
| GNMA | Government National Mortgage Association |
| GO | General Obligation Bonds |
| HUD SECT 8 | &nbsp;&nbsp;&nbsp; U.S. Department of Housing and Urban Development <br> Section 8<br>|
| M/F | Multi-Family |
| PSF | Permanent School Fund |
| Q-SBLF | Qualified School Bond Loan Fund |
| RB | Revenue Bonds |
| S/F | Single-Family |
| SAW | State Aid Withholding |
| SONYMA | State of New York Mortgage Agency |
| ST | Special Tax |
| VRDN | Variable Rate Demand Note |

---

------

## Form NPORT-P: Monthly Portfolio Investments Report

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

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

- **a. Name of Registrant:** BlackRock Municipal Bond Fund, Inc.

- **b. Investment Company Act file number:** 811-02688

- **c. CIK number of Registrant:** 0000225635

- **d. LEI of Registrant:** 549300RTFZS1V1PV8C63

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

  - **Street Address 1:** 100 Bellevue Parkway

  - **City:** Wilmington

  - **State:** DE

  - **Foreign country:** US

  - **Zip / Postal Code:** 19809

  - **Telephone number:** 800-441-7762

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

- **a. Name of Series:** BlackRock Impact Municipal Fund

- **b. EDGAR series identifier (if any):** S000075512

- **c. LEI of Series:** 549300VLXUF5M46N0A36

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

- **a. Date of fiscal year-end:** 2026-05-31

- **b. Date as of which information is reported:** 2025-08-31

**Item A.4. Final filing**

Does the Fund anticipate that this will be its final filing on Form N-PORT? **Yes**

### Fund Information

**Total Assets:** $49047719.51

**Total Liabilities:** $2595976.26

**Net Assets:** $46451743.25

**Currency Risk Metrics (dv01):**

- 

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

- **3-Month:** 0.00000000 | **1-Year:** 0.00000000 | **5-Year:** 13971.90000000 | **10-Year:** 9435.42000000 | **30-Year:** 17444.76000000

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

- **3-Month:** 0.00000000 | **1-Year:** 0.00000000 | **5-Year:** 201.21000000 | **10-Year:** 421.83000000 | **30-Year:** 984.74000000

**Monthly Return Information**

| Class               | Month 1 Return (%)   | Month 2 Return (%)   | Month 3 Return (%)   |
|:---|:---|:---|:---|
| Class ID C000234662 | -0.01%               | -0.86%               | 0.85%                |
| Class ID C000234661 | 0.10%                | -0.97%               | 0.85%                |
| Class ID C000234660 | -0.03%               | -0.88%               | 0.72%                |

**Monthly Gains & Losses**

| Period   | Net Realized Gain/Loss   | Net Unrealized Appreciation/Depreciation   |
|:---|:---|:---|
| Month 1  | $-286078.19              | $157262.40                                 |
| Month 2  | $-199.12                 | $-572886.21                                |
| Month 3  | $487.33                  | $223048.50                                 |

**Designated Index Information**

- **Index Name:** Fund`s Designated Reference Portfolio is the Fund`s Securities Portfolio

- **Index Identifier:** Fund`s Designated Reference Portfolio is the Fund`s Securities Portfolio

### 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   |
|:---|:---|:---|:---|:---|:---|:---|---:|:---|:---|:---|:---|:---|:---|:---|---:|:---|
| University of Massachusetts Building Authority                     | UNIV OF MASSACHUSETTS MA BLDGAUTH PROJ REVENUE              | CUSIP: 914440UF7<br>LEI: 6ILE2573NPR1XO2TR556 | Long             | DBT              | MUN               | US        |   1000000 | PA      | $875979.16    | 1.89%             | 2046-11-01      | Fixed         | 4.00%                 | No            |                  2 | On Loan: No      |
| Florida Development Finance Corp                                   | FLORIDA ST DEV FIN CORP EDUCTNL FACS REVENUE                | CUSIP: 34061UKK3<br>LEI: 549300HC854CNBLMWC48 | Long             | DBT              | MUN               | US        |    500000 | PA      | $427944.64    | 0.92%             | 2042-06-15      | Fixed         | 4.00%                 | No            |                  2 | On Loan: No      |
| Colorado School of Mines                                           | COLORADO ST SCH OF MINES INSTNL ENTERPRISE REVENUE          | CUSIP: 19658QGD3<br>LEI: 549300TQMFMDZTM5HY46 | Long             | DBT              | MUN               | US        |    290000 | PA      | $295742.85    | 0.64%             | 2047-12-01      | Fixed         | 5.25%                 | No            |                  2 | On Loan: No      |
| Florida Development Finance Corp                                   | FLORIDA ST DEV FIN CORP EDUCTNL FACS REVENUE                | CUSIP: 34061UKM9<br>LEI: 549300HC854CNBLMWC48 | Long             | DBT              | MUN               | US        |    375000 | PA      | $345199.64    | 0.74%             | 2047-06-15      | Fixed         | 5.00%                 | No            |                  2 | On Loan: No      |
| CSCDA Community Improvement Authority                              | CSCDA CMNTY IMPT AUTH CA ESSENTIAL HSG REVENUE              | CUSIP: 126292BG5<br>LEI: N/A                  | Long             | DBT              | MUN               | US        |    250000 | PA      | $173733.66    | 0.37%             | 2057-04-01      | Fixed         | 3.25%                 | No            |                  2 | On Loan: No      |
| Michigan State Housing Development Authority                       | MICHIGAN ST HSG DEV AUTH RENTAL HSG REVENUE                 | CUSIP: 59465PEK0<br>LEI: 549300NSWW1HVXE93T03 | Long             | DBT              | MUN               | US        |   1000000 | PA      | $996544.19    | 2.15%             | 2053-10-01      | Fixed         | 5.10%                 | No            |                  2 | On Loan: No      |
| California Community Choice Financing Authority                    | CALIFORNIA CMNTY CHOICE FING AUTH CLEAN ENERGY PROJ REVENUE | CUSIP: 13013JDR4<br>LEI: 549300X8VKJ215S2R571 | Long             | DBT              | MUN               | US        |   1440000 | PA      | $1538296.99   | 3.31%             | 2054-05-01      | Floating      | 5.00%                 | No            |                  2 | On Loan: No      |
| California School Finance Authority                                | CALIFORNIA ST SCH FIN AUTH CHRT SCH REVENUE                 | CUSIP: 13058TPU8<br>LEI: N/A                  | Long             | DBT              | MUN               | US        |    125000 | PA      | $119818.55    | 0.26%             | 2042-08-01      | Fixed         | 5.00%                 | No            |                  2 | On Loan: No      |
| Michigan Finance Authority                                         | MICHIGAN ST FIN AUTH ACT 38 FACS SENIOR REVEUE              | CUSIP: 59447NBE5<br>LEI: 54930022O46HOX5J1D14 | Long             | DBT              | MUN               | US        |    110000 | PA      | $110336.35    | 0.24%             | 2057-02-28      | Fixed         | 5.50%                 | No            |                  2 | On Loan: No      |
| New York Transportation Development Corp                           | NEW YORK ST TRANSPRTN DEV CORP SPL FAC REVENUE              | CUSIP: 650116HK5<br>LEI: N/A                  | Long             | DBT              | MUN               | US        |    550000 | PA      | $525912.62    | 1.13%             | 2049-06-30      | Fixed         | 5.25%                 | No            |                  2 | On Loan: No      |
| California Infrastructure & Economic Development Bank              | CALIFORNIA ST INFRASTRUCTURE & ECON DEV BANK REVENUE        | CUSIP: 13034A6X3<br>LEI: 549300C1OG9RDIM8ET06 | Long             | DBT              | MUN               | US        |   1000000 | PA      | $1039034.19   | 2.24%             | 2045-05-15      | Fixed         | 5.00%                 | No            |                  2 | On Loan: No      |
| Michigan Finance Authority                                         | MICHIGAN ST FIN AUTH REVENUE                                | CUSIP: 59447TVD2<br>LEI: 54930022O46HOX5J1D14 | Long             | DBT              | MUN               | US        |    500000 | PA      | $420119.14    | 0.90%             | 2047-02-15      | Fixed         | 4.00%                 | No            |                  2 | On Loan: No      |
| Build NYC Resource Corp                                            | BUILD NYC RESOURCE CORP NY REVENUE                          | CUSIP: 12008EVA1<br>LEI: 549300GROJFKMNLWEK84 | Long             | DBT              | MUN               | US        |    175000 | PA      | $191827.46    | 0.41%             | 2033-07-01      | Fixed         | 5.13%                 | No            |                  2 | On Loan: No      |
| Louisville/Jefferson County Metropolitan Government                | LOUISVILLE & JEFFERSON CNTY KY MET GOVT HOSP REVENUE        | CUSIP: 54660DAA7<br>LEI: N/A                  | Long             | DBT              | MUN               | US        |   1000000 | PA      | $983147.58    | 2.12%             | 2047-05-15      | Fixed         | 5.00%                 | No            |                  2 | On Loan: No      |
| Washington Metropolitan Area Transit Authority Dedicated Revenue   | WASHINGTON DC MET AREA TRANSIT AUTH DEDICATED REVENUE       | CUSIP: 93878YCS6<br>LEI: N/A                  | Long             | DBT              | MUN               | US        |    250000 | PA      | $218807.58    | 0.47%             | 2047-07-15      | Fixed         | 4.13%                 | No            |                  2 | On Loan: No      |
| California Community Choice Financing Authority                    | CALIFORNIA CMNTY CHOICE FING AUTH CLEAN ENERGY PROJ REVENUE | CUSIP: 13013JEB8<br>LEI: 549300X8VKJ215S2R571 | Long             | DBT              | MUN               | US        |    150000 | PA      | $159167.00    | 0.34%             | 2055-08-01      | Floating      | 5.00%                 | No            |                  2 | On Loan: No      |
| Brevard County Health Facilities Authority                         | BREVARD CNTY FL HLTH FACS AUTH REVENUE                      | CUSIP: 107416QN2<br>LEI: N/A                  | Long             | DBT              | MUN               | US        |   1000000 | PA      | $807957.08    | 1.74%             | 2052-04-01      | Fixed         | 4.00%                 | No            |                  2 | On Loan: No      |
| Connecticut State Health & Educational Facilities Authority        | CONNECTICUT ST HLTH & EDUCTNL FACS AUTH REVENUE             | CUSIP: 20775DVQ2<br>LEI: 549300ZOQJ5U8YBS5Q35 | Long             | DBT              | MUN               | US        |    180000 | PA      | $183065.41    | 0.39%             | 2048-07-15      | Fixed         | 5.25%                 | No            |                  2 | On Loan: No      |
| Duluth Economic Development Authority                              | DULUTH MN ECON DEV AUTH HLTH CARE FACS REVENUE              | CUSIP: 26444CKJ0<br>LEI: N/A                  | Long             | DBT              | MUN               | US        |    500000 | PA      | $517373.39    | 1.11%             | 2042-06-15      | Fixed         | 5.25%                 | No            |                  2 | On Loan: No      |
| Colorado Health Facilities Authority                               | COLORADO ST HLTH FACS AUTH REVENUE                          | CUSIP: 19648FYT5<br>LEI: 5493002JB6DRFRZPEQ21 | Long             | DBT              | MUN               | US        |   1200000 | PA      | $1200000.00   | 2.58%             | 2064-05-15      | Floating      | 3.85%                 | No            |                  2 | On Loan: No      |
| Ludington Area School District                                     | LUDINGTON MI AREA SCH DIST                                  | CUSIP: 549637GU4<br>LEI: N/A                  | Long             | DBT              | MUN               | US        |   1000000 | PA      | $847928.31    | 1.83%             | 2051-05-01      | Fixed         | 4.00%                 | No            |                  2 | On Loan: No      |
| City of Philadelphia PA Water & Wastewater Revenue                 | PHILADELPHIA PA WTR & WSTWTR REVENUE                        | CUSIP: 717893Z79<br>LEI: N/A                  | Long             | DBT              | MUN               | US        |   1000000 | PA      | $1032507.48   | 2.22%             | 2047-06-01      | Fixed         | 5.50%                 | No            |                  2 | On Loan: No      |
| Denver City & County School District No 1                          | DENVER CITY & CNTY CO SCH DIST #1                           | CUSIP: 249174YP2<br>LEI: N/A                  | Long             | DBT              | MUN               | US        |    500000 | PA      | $511307.91    | 1.10%             | 2045-12-01      | Fixed         | 5.00%                 | No            |                  2 | On Loan: No      |
| State of Texas                                                     | TEXAS ST                                                    | CUSIP: 882724QQ3<br>LEI: 549300X9CH74QB747L76 | Long             | DBT              | MUN               | US        |   1000000 | PA      | $1000000.00   | 2.15%             | 2050-12-01      | Floating      | 2.77%                 | No            |                  2 | On Loan: No      |
| Southeastern Pennsylvania Transportation Authority                 | S ESTRN PA TRANSPRTN AUTH                                   | CUSIP: 842039FQ7<br>LEI: 98450061A2F3FD36E493 | Long             | DBT              | MUN               | US        |   1000000 | PA      | $1028435.13   | 2.21%             | 2047-06-01      | Fixed         | 5.25%                 | No            |                  2 | On Loan: No      |
| University of Arkansas                                             | UNIV OF ARKANSAS AR UNIV REVENUE                            | CUSIP: 914073DU2<br>LEI: 549300FFADBQ3NEI2D96 | Long             | DBT              | MUN               | US        |   1000000 | PA      | $1011666.18   | 2.18%             | 2047-04-01      | Fixed         | 5.00%                 | No            |                  2 | On Loan: No      |
| New York City Municipal Water Finance Authority                    | NEW YORK CITY NY MUNI WTR FIN AUTH WTR & SWR SYS REVENUE    | CUSIP: 64972GMJ0<br>LEI: 549300Q2EHQ6RJPQKP05 | Long             | DBT              | MUN               | US        |   1200000 | PA      | $1200000.00   | 2.58%             | 2049-06-15      | Floating      | 4.00%                 | No            |                  2 | On Loan: No      |
| Jefferson Parish Consolidated Sewerage District No 1               | JEFFERSON PARISH LA CONSOL SEWERAGE DIST #1 SWR REVENUE     | CUSIP: 474481AS7<br>LEI: N/A                  | Long             | DBT              | MUN               | US        |   1000000 | PA      | $969216.31    | 2.09%             | 2039-02-01      | Fixed         | 4.00%                 | No            |                  2 | On Loan: No      |
| Louisiana Public Facilities Authority                              | LOUISIANA PUB FACS AUTH REVENUE                             | CUSIP: 546399PH3<br>LEI: 549300RQIPT5S4P4M065 | Long             | DBT              | MUN               | US        |    250000 | PA      | $228732.36    | 0.49%             | 2052-06-01      | Fixed         | 6.38%                 | No            |                  2 | On Loan: No      |
| New York City Housing Development Corp                             | NEW YORK CITY NY HSG DEV CORP MF HSG REVENUE                | CUSIP: 64972E3A5<br>LEI: 549300SQWVHKBRF8D702 | Long             | DBT              | MUN               | US        |   1000000 | PA      | $950349.96    | 2.05%             | 2047-11-01      | Fixed         | 4.75%                 | No            |                  2 | On Loan: No      |
| New York Transportation Development Corp                           | NEW YORK ST TRANSPRTN DEV CORP SPL FAC REVENUE              | CUSIP: 650116HT6<br>LEI: N/A                  | Long             | DBT              | MUN               | US        |    810000 | PA      | $794294.45    | 1.71%             | 2054-12-31      | Fixed         | 5.25%                 | No            |                  2 | On Loan: No      |
| New Hampshire Business Finance Authority                           | NATIONAL FIN AUTH NH MUNI CTFS                              | CUSIP: 63607WAC8<br>LEI: N/A                  | Long             | DBT              | MUN               | US        |    718680 | PA      | $697420.12    | 1.50%             | 2036-09-20      | Fixed         | 4.38%                 | No            |                  2 | On Loan: No      |
| Nassau County Local Economic Assistance Corp                       | NASSAU CNTY NY LOCAL ECON ASSISTANCE CORP EDL REVENUE       | CUSIP: 63165CAB8<br>LEI: 549300FCI13UFG0Y6Y37 | Long             | DBT              | MUN               | US        |   1000000 | PA      | $1008023.61   | 2.17%             | 2043-07-01      | Fixed         | 5.00%                 | No            |                  2 | On Loan: No      |
| Massachusetts Clean Water Trust/The                                | MASSACHUSETTS ST CLEAN WTR TRUST                            | CUSIP: 575829NS1<br>LEI: 549300SYPEROLSQU0261 | Long             | DBT              | MUN               | US        |   1500000 | PA      | $1558207.52   | 3.35%             | 2045-02-01      | Fixed         | 5.00%                 | No            |                  2 | On Loan: No      |
| St Lucie County School Board                                       | SAINT LUCIE CNTY FL SCH BRD COPS                            | CUSIP: 792075PV9<br>LEI: N/A                  | Long             | DBT              | MUN               | US        |   1500000 | PA      | $1497580.83   | 3.22%             | 2048-07-01      | Fixed         | 5.00%                 | No            |                  2 | On Loan: No      |
| New York Transportation Development Corp                           | NEW YORK ST TRANSPRTN DEV CORP SPL FAC REVENUE              | CUSIP: 650116GW0<br>LEI: N/A                  | Long             | DBT              | MUN               | US        |    500000 | PA      | $510232.78    | 1.10%             | 2044-06-30      | Fixed         | 5.50%                 | No            |                  2 | On Loan: No      |
| Arkansas Development Finance Authority                             | ARKANSAS DEV FIN AUTH ENVIRONMENTAL REVENUE                 | CUSIP: 04110FAB1<br>LEI: N/A                  | Long             | DBT              | MUN               | US        |    100000 | PA      | $99779.59     | 0.21%             | 2053-05-01      | Fixed         | 5.70%                 | No            |                  2 | On Loan: No      |
| Arlington Higher Education Finance Corp                            | ARLINGTON TX HGR EDU FIN CORP EDU REVENUE                   | CUSIP: 0418067Q7<br>LEI: N/A                  | Long             | DBT              | MUN               | US        |    500000 | PA      | $503197.63    | 1.08%             | 2047-08-15      | Fixed         | 5.00%                 | No            |                  2 | On Loan: No      |
| Ohio Water Development Authority Water Pollution Control Loan Fund | OHIO ST WTR DEV AUTH WTR POLLCONTROL REVENUE                | CUSIP: 67766WQ21<br>LEI: N/A                  | Long             | DBT              | MUN               | US        |   1200000 | PA      | $1200000.00   | 2.58%             | 2054-12-01      | Floating      | 3.90%                 | No            |                  2 | On Loan: No      |
| California State Public Works Board                                | CALIFORNIA ST PUBLIC WKS BRD LEASE REVENUE                  | CUSIP: 13068XFG9<br>LEI: N/A                  | Long             | DBT              | MUN               | US        |   1000000 | PA      | $911985.78    | 1.96%             | 2045-05-01      | Fixed         | 4.00%                 | No            |                  2 | On Loan: No      |
| New York Power Authority                                           | NEW YORK ST PWR AUTH GREEN TRANSMISSION PROJ REVENUE        | CUSIP: 65000XAU4<br>LEI: I5P1GEYFGGMMDOFX2L30 | Long             | DBT              | MUN               | US        |   1000000 | PA      | $938202.06    | 2.02%             | 2042-11-15      | Fixed         | 4.00%                 | No            |                  2 | On Loan: No      |
| Connecticut Housing Finance Authority                              | CONNECTICUT ST HSG FIN AUTH HSG MTGE FIN PROGRAM            | CUSIP: 20775CZF4<br>LEI: 5493003DXX0NRJKSH186 | Long             | DBT              | MUN               | US        |   1180000 | PA      | $1180000.00   | 2.54%             | 2046-11-15      | Floating      | 2.77%                 | No            |                  2 | On Loan: No      |
| BlackRock Liquidity Funds                                          | BlackRock Liquidity Funds: MuniCash, Institutional Shares   | CUSIP: 09248U841<br>LEI: 5493007YVNX55LTRQ706 | Long             | STIV             | RF                | US        |   2838359 | NS      | $2838643.12   | 6.11%             |  |  |  | No            |                  1 | On Loan: No      |
| Metropolitan Transportation Authority                              | MET TRANSPRTN AUTH NY REVENUE                               | CUSIP: 59261AD87<br>LEI: 5493000TKYODLXADQD60 | Long             | DBT              | MUN               | US        |   1000000 | PA      | $965761.57    | 2.08%             | 2049-11-15      | Fixed         | 5.00%                 | No            |                  2 | On Loan: No      |
| Maryland Economic Development Corp                                 | MARYLAND ST ECON DEV CORP PRIV ACTIVITY REVENUE             | CUSIP: 57422JBY3<br>LEI: 549300JJ16DDBSZWSN94 | Long             | DBT              | MUN               | US        |    715000 | PA      | $693831.92    | 1.49%             | 2047-06-30      | Fixed         | 5.25%                 | No            |                  2 | On Loan: No      |
| Commonwealth of Massachusetts Transportation Fund Revenue          | MASSACHUSETTS ST TRANSPRTN FUND REVENUE                     | CUSIP: 57604TKC9<br>LEI: N/A                  | Long             | DBT              | MUN               | US        |   1500000 | PA      | $1506218.04   | 3.24%             | 2050-06-01      | Fixed         | 5.00%                 | No            |                  2 | On Loan: No      |
| Texas State Technical College                                      | TEXAS ST TECH CLG SYS FING SYS REVENUE                      | CUSIP: 88276RFJ6<br>LEI: N/A                  | Long             | DBT              | MUN               | US        |    665000 | PA      | $709646.20    | 1.53%             | 2042-08-01      | Fixed         | 5.50%                 | No            |                  2 | On Loan: No      |
| Arizona Industrial Development Authority                           | ARIZONA ST INDL DEV AUTH EDU REVENUE                        | CUSIP: 04052BSY1<br>LEI: N/A                  | Long             | DBT              | MUN               | US        |    150000 | PA      | $142859.30    | 0.31%             | 2043-07-01      | Fixed         | 5.25%                 | No            |                  2 | On Loan: No      |
| Chicago Transit Authority Sales Tax Receipts Fund                  | CHICAGO IL TRANSIT AUTH SALES TAX RECPTS REVENUE            | CUSIP: 16772PDN3<br>LEI: N/A                  | Long             | DBT              | MUN               | US        |   1200000 | PA      | $1167786.07   | 2.51%             | 2057-12-01      | Fixed         | 5.00%                 | No            |                  2 | On Loan: No      |
| New York City Housing Development Corp                             | NEW YORK CITY NY HSG DEV CORP MF HSG REVENUE                | CUSIP: 64972E4F3<br>LEI: 549300SQWVHKBRF8D702 | Long             | DBT              | MUN               | US        |    225000 | PA      | $216285.10    | 0.47%             | 2043-11-01      | Fixed         | 4.60%                 | No            |                  2 | On Loan: No      |
| Pittsburgh Water & Sewer Authority                                 | PITTSBURGH PA WTR & SWR AUTH                                | CUSIP: 725304YA1<br>LEI: 54930034DVH6W22T1E86 | Long             | DBT              | MUN               | US        |    225000 | PA      | $226584.73    | 0.49%             | 2048-09-01      | Fixed         | 5.00%                 | No            |                  2 | On Loan: No      |
| New York State Housing Finance Agency                              | NEW YORK ST HSG FIN AGY AFFORDABLE HSG REVENUE              | CUSIP: 64987JH38<br>LEI: 5493000LS7KCDB02O506 | Long             | DBT              | MUN               | US        |    735000 | PA      | $735021.14    | 1.58%             | 2062-11-01      | Floating      | 3.80%                 | No            |                  2 | On Loan: No      |
| Henrico County Economic Development Authority                      | HENRICO CNTY VA ECON DEV AUTH RSDL CARE FAC REVENUE         | CUSIP: 42605QHM8<br>LEI: N/A                  | Long             | DBT              | MUN               | US        |   1000000 | PA      | $990037.38    | 2.13%             | 2047-10-01      | Fixed         | 5.00%                 | No            |                  2 | On Loan: No      |
| District of Columbia                                               | DIST OF COLUMBIA REVENUE                                    | CUSIP: 25483VZY3<br>LEI: 549300HWFOZXPKGOX654 | Long             | DBT              | MUN               | US        |   1000000 | PA      | $1115983.70   | 2.40%             | 2034-02-28      | Fixed         | 5.50%                 | No            |                  2 | On Loan: No      |
| Build NYC Resource Corp                                            | BUILD NYC RESOURCE CORP NY REVENUE                          | CUSIP: 12008ESL1<br>LEI: 549300GROJFKMNLWEK84 | Long             | DBT              | MUN               | US        |    245000 | PA      | $243783.19    | 0.52%             | 2032-07-01      | Fixed         | 5.00%                 | No            |                  2 | On Loan: No      |
| State of Connecticut                                               | CONNECTICUT ST                                              | CUSIP: 20772KQA0<br>LEI: 549300PHW5BZHA7BEX81 | Long             | DBT              | MUN               | US        |   1000000 | PA      | $1042021.94   | 2.24%             | 2042-01-15      | Fixed         | 5.00%                 | No            |                  2 | On Loan: No      |
| California Infrastructure & Economic Development Bank              | CALIFORNIA ST INFRASTRUCTURE & ECON DEV BANK REVENUE        | CUSIP: 13034A6B1<br>LEI: 549300C1OG9RDIM8ET06 | Long             | DBT              | MUN               | US        |    485000 | PA      | $443780.99    | 0.96%             | 2065-01-01      | Floating      | 9.50%                 | No            |                  2 | On Loan: No      |
| City of El Paso TX Water & Sewer Revenue                           | EL PASO TX WTR & SWR REVENUE                                | CUSIP: 283822WH3<br>LEI: N/A                  | Long             | DBT              | MUN               | US        |   1000000 | PA      | $1008832.24   | 2.17%             | 2046-03-01      | Fixed         | 5.00%                 | No            |                  2 | On Loan: No      |
| San Joaquin Valley Clean Energy Authority                          | SAN JOAQUIN VLY CLEAN ENERGY AUTH CA CLEAN ENERGY REVENUE   | CUSIP: 79811YAK4<br>LEI: 254900VA5DFN33OVGH87 | Long             | DBT              | MUN               | US        |    140000 | PA      | $154968.05    | 0.33%             | 2056-01-01      | Floating      | 5.50%                 | No            |                  2 | On Loan: No      |
| Port of Portland OR Airport Revenue                                | PORT OF PORTLAND OR ARPT REVENUE                            | CUSIP: 7352403J0<br>LEI: N/A                  | Long             | DBT              | MUN               | US        |    410000 | PA      | $422057.11    | 0.91%             | 2048-07-01      | Fixed         | 5.50%                 | No            |                  2 | On Loan: No      |
| Camden County Improvement Authority/The                            | CAMDEN CNTY NJ IMPT AUTH SCH REVENUE                        | CUSIP: 13281PAB3<br>LEI: 549300UTQBT9ZE0QFB15 | Long             | DBT              | MUN               | US        |    115000 | PA      | $119336.73    | 0.26%             | 2047-06-15      | Fixed         | 6.00%                 | No            |                  2 | On Loan: No      |
| Tarrant County Cultural Education Facilities Finance Corp          | TARRANT CNTY TX CULTURAL EDU FACS FIN CORP HOSP REVENUE     | CUSIP: 87638QTH2<br>LEI: 549300ROY505NVTMMI25 | Long             | DBT              | MUN               | US        |   1500000 | PA      | $1525410.57   | 3.28%             | 2045-12-01      | Fixed         | 5.00%                 | No            |                  2 | On Loan: No      |
| CSCDA Community Improvement Authority                              | CSCDA CMNTY IMPT AUTH CA ESSENTIAL HSG REVENUE              | CUSIP: 126292AW1<br>LEI: N/A                  | Long             | DBT              | MUN               | US        |    350000 | PA      | $226121.47    | 0.49%             | 2057-02-01      | Fixed         | 3.00%                 | No            |                  2 | On Loan: No      |
| Alaska Housing Finance Corp                                        | ALASKA ST HSG FIN CORP HOME MTGE REVENUE                    | CUSIP: 01170PBW5<br>LEI: 549300HJ8NOJNYW6ER36 | Long             | DBT              | MUN               | US        |   1200000 | PA      | $1200000.00   | 2.58%             | 2041-12-01      | Floating      | 2.68%                 | No            |                  2 | On Loan: No      |

### Signature

**Date Signed:** 2025-09-30

**Name of Applicant:** BlackRock Municipal Bond Fund, Inc.

**Signature:** Chuck Pulsfort

**Name of Signer:** Chuck Pulsfort

**Title:** Assistant Treasurer