Company: MYI
Filing Date: 2025-09-05
Form Type: 424B3
Source: 0001193125-25-196285
Chunk: 451

Company: BLACKROCK MUNIYIELD QUALITY FUND III, INC.
Filing Date: 2025-09-05
Form: 424B3
Chunk 451
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 our service level expectations and have effective policies and procedures in place to manage potential conflicts of interest. Our oversight of service providers includes regular meetings with client service teams, systematic monitoring of vendor operations, as well as annual due diligence meetings in accordance with BlackRock’s firmwide policies. Conflicts management policies and procedures BAIS maintains policies and procedures that seek to prevent undue influence on BlackRock’s proxy voting activity. Such influence might stem from any relationship between the investee company (or any shareholder proponent or dissident shareholder) and BlackRock, BlackRock’s affiliates, a Fund or a Fund’s affiliates, or BlackRock employees. The following are examples of sources of perceived or potential conflicts of interest:

| • |     | BlackRock clients who may be issuers of securities or proponents of shareholder resolutions |

| • |     | BlackRock business partners or third parties who may be issuers of securities or proponents of shareholder 
 resolutions                                                                                                |

| • |     | BlackRock employees who may sit on the boards of public companies held in Funds managed by BlackRock |

| • |     | Significant BlackRock, Inc. investors who may be issuers of securities held in Funds managed by BlackRock |

| • |     | Securities of BlackRock, Inc. or BlackRock investment funds held in Funds managed by BlackRock |

| • |     | BlackRock, Inc. board members who serve as senior executives or directors of public companies held in Funds 
 managed by BlackRock                                                                                        |

BlackRock has taken certain steps to mitigate perceived or potential conflicts including, but not limited to, the following:

| • |     | Adopted the Guidelines which are designed to advance our clients’ long-term economic interests in the 
 companies in which BlackRock invests on their behalf                                                  |

| • |     | Established a reporting structure that separates BAIS from employees with sales, vendor management, or                                                                                                                                                    
 business partnership roles. In addition, BlackRock seeks to ensure that all engagements with corporate issuers, dissident shareholders or shareholder proponents are managed consistently and without regard to BlackRock’s relationship with such        
 parties. Clients or business partners are not given special treatment or differentiated access. BAIS prioritizes engagements based on factors including, but not limited to, our need for additional information to make a voting decision or our view on 
 the likelihood that an engagement could lead to positive outcome(s) over time for the economic value of the company. Within the normal course of business, BAIS may engage directly with BlackRock clients, business partners and/or third parties,       
 and