# EDGAR Filing Document

**Accession Number:** 0000901243
**File Stem:** 0001193125-25-242071
**Filing Date:** 2025-10
**Character Count:** 2671
**Document Hash:** 82f08c03e5860d66a7677d8ccd843233
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001193125-25-242071.hdr.sgml**: 20251017

**ACCESSION NUMBER**: 0001193125-25-242071

**CONFORMED SUBMISSION TYPE**: 424B3

**PUBLIC DOCUMENT COUNT**: 1

**FILED AS OF DATE**: 20251017

**DATE AS OF CHANGE**: 20251017

**FILER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** BLACKROCK MUNIASSETS FUND, INC.
- **CENTRAL INDEX KEY:** 0000901243

**ORGANIZATION NAME:**
- **EIN:** 223239638
- **STATE OF INCORPORATION:** MD
- **FISCAL YEAR END:** 1231

**FILING VALUES:**
- **FORM TYPE:** 424B3
- **SEC ACT:** 1933 Act
- **SEC FILE NUMBER:** 333-288712
- **FILM NUMBER:** 251399099

**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:** MUNIASSETS FUND INC
- **DATE OF NAME CHANGE:** 19930714

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** MUNIINCOME FUND INC
- **DATE OF NAME CHANGE:** 19930517

**Filed Pursuant to Rule 424(b)(3) <br> Registration File No.: 333-288712**

<br> **BLACKROCK LONG-TERM MUNICIPAL ADVANTAGE TRUST** 

**BLACKROCK MUNIASSETS FUND, INC.** 

**Important Information Regarding the Joint Proxy Statement/Prospectus, dated September 4, 2025 for BlackRock Long-Term Municipal Advantage Trust ("BTA") and BlackRock MuniAssets Fund, Inc. ("MUA" or the "Acquiring Fund")**

**The following changes are made to the Joint Proxy Statement/Prospectus:**

The Section of the Joint Proxy Statement/Prospectus entitled "Voting Information and Requirements – Voting Requirement for Proposal 2: The Issuance of Acquiring Fund Common Shares" is deleted in its entirety and replaced with the following information:

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;**Voting Requirement for Proposal 2: The Issuance of Acquiring Fund Common Shares**

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| | |
|:---|:---|
| **Proposal** | **Required Approval of** <br> **Shareholders** |
| &nbsp;&nbsp;&nbsp; *Proposal 2*: The common shareholders and VRDP Holders of the Acquiring Fund are being asked to vote as a single class on a proposal to approve the issuance of additional Acquiring Fund common shares in connection with the Reorganization. | &nbsp;&nbsp;&nbsp; Majority of votes entitled to be cast present at the Special Meeting or represented by proxy |

---

All other references in the Joint Proxy Statement/Prospectus and the accompanying exhibits referencing the vote requirement for shareholders to approve Proposal 2 are hereby revised and restated to reflect the vote requirement stated in the table above.