Company: MYI
Filing Date: 2025-09-05
Form Type: 424B3
Source: 0001193125-25-196285
Chunk: 452

Company: BLACKROCK MUNIYIELD QUALITY FUND III, INC.
Filing Date: 2025-09-05
Form: 424B3
Chunk 452
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/or with employees with sales, vendor management, or business partnership roles, in discussions regarding our approach to stewardship, general corporate governance matters, client reporting needs, and/or to otherwise ensure that proxy-related     
 client service levels are met                                                                                                                                                                                                                             |

| • |     | Determined to engage, in certain instances, an independent third-party voting service provider to make proxy                                                                                                                                        
 voting recommendations as a further safeguard to avoid potential conflicts of interest, to satisfy regulatory compliance requirements, or as may be otherwise required by applicable law. In such circumstances, the independent third-party voting 
 service provider provides BlackRock with recommendations, in accordance with the Guidelines, as to how to vote such proxies. BlackRock uses an independent third-party voting service provider to make proxy voting recommendations for shares of   
 BlackRock, Inc. and companies affiliated with BlackRock, Inc. BlackRock may also use an independent third-party voting service provider to make proxy voting recommendations for:                                                                   |

| • |     | public companies that include BlackRock employees on their boards of directors |

B-20

| • |     | public companies of which a BlackRock, Inc. board member serves as a senior executive or a member of the board 
 of directors                                                                                                   |

| • |     | public companies that are the subject of certain transactions involving BlackRock Funds |

| • |     | public companies that are joint venture partners with BlackRock, and |

| • |     | public companies when legal or regulatory requirements compel BlackRock to use an independent third-party 
 voting service provider                                                                                   |

In selecting an independent third-party voting service provider, we assess several characteristics, including but not limited to: independence, an ability to analyze proxy issues and make recommendations in the economic interest of our clients in accordance with the Guidelines, reputation for reliability and integrity, and operational capacity to accurately deliver the assigned recommendations in a timely manner. We may engage more than one independent third-party voting service provider, in part to mitigate potential or perceived conflicts of interest at a single voting service provider. The Active Investment Stewardship Oversight Committee appoints and reviews the performance of the independent third-party voting service providers, generally on an annual basis. Securities lending When so authorized, BlackRock acts as a securities lending agent on behalf of Funds. Securities lending is a well-regulated practice that contributes to capital market efficiency. It also enables funds to generate additional returns while allowing fund providers to keep fund expenses lower. With regard to the relationship between securities lending and proxy voting, BlackRock cannot vote shares on loan and may determine to recall