Company: MYI
Filing Date: 2025-07-15
Form Type: 425
Source: 0001193125-25-158891
Chunk: 0

Company: BLACKROCK MUNIYIELD QUALITY FUND III, INC.
Filing Date: 2025-07-15
Form: 425
Chunk 0
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Filed by BlackRock MuniYield Quality Fund III, Inc. pursuant to Rule 425 under the Securities Act of 1933 and deemed filed pursuant to Rule 14a-12 under the Securities Exchange Act of 1934 Subject Company: BlackRock MuniYield Michigan Quality Fund, Inc. Investment Company Act File No.: 811-07080 Date: July 14, 2025

Contact: 1-800-882-0052 BlackRock Announces Board Approvals Seeking to Deliver Significant Scale Benefits to Municipal CEF Shareholders New York, June 9, 2025 –BlackRock Advisors, LLC announced today that each of the Boards of Directors/Trustees of each of the closed-endfunds named below (each, a “Fund” and collectively, the “Funds”) has approved the following reorganizations and mergers (each, a “Reorganization” and collectively, the “Reorganizations”), as applicable: These include a number of previously approved reorganizations: 1-21-2025Press Release .

| • |     | Reorganization of BlackRock Long-Term Municipal Advantage Trust (BTA) with and into BlackRock MuniAssets Fund, Inc. 
 (MUA)1                                                                                                              |

| • |     | Reorganization of BlackRock California Municipal Income Trust (BFZ) with and into BlackRock MuniHoldings California 
 Quality Fund, Inc. (MUC)                                                                                            |

| • |     | Reorganizations of BlackRock New York Municipal Income Trust (BNY) and BlackRock MuniHoldings New York Quality Fund, 
 Inc (MHN) with and into BlackRock MuniYield New York Quality Fund, Inc (MYN)                                         |

| • |     | Reorganizations of BlackRock MuniYield Fund, Inc. (MYD), BlackRock MuniYield Quality Fund II, Inc. (MQT), BlackRock                                                                                               
 Investment Quality Municipal Trust, Inc. (BKN), BlackRock Virginia Municipal Bond Trust (BHV) and BlackRock MuniYield Pennsylvania Quality Fund (MPA) with and into BlackRock MuniYield Quality Fund, Inc. (MQY)2 |

| • |     | Reorganizations of BlackRock MuniHoldings Quality Fund II, Inc. (MUE), BlackRock Municipal Income Trust (BFK),                                       
 BlackRock Municipal Income Quality Trust (BYM) and BlackRock Municipal Income Trust II (BLE) with and into BlackRock Muni