Company: MYI
Filing Date: 2025-08-12
Form Type: 425
Source: 0001193125-25-178174
Chunk: 1

Company: BLACKROCK MUNIYIELD QUALITY FUND III, INC.
Filing Date: 2025-08-12
Form: 425
Chunk 1
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uniYield Michigan 
 Quality Fund, Inc. (MIY) with and into BlackRock MuniYield Quality Fund III, Inc. (MYI)                      |

We request that you take all necessary steps to recall any Fund shares on loan in order to ensure that you are a record date shareholder with respect thereto. The record date for each Joint Special Meeting is expected to be on or about August 18, 2025. This communication is not intended to, and does not, constitute an offer to purchase or sell shares of the Funds nor is this communication intended to solicit a proxy from any shareholder of any of the Funds. The solicitation of the purchase or sale of securities or of proxies to effect the Reorganizations will only be made by either a definitive Proxy Statement or a definitive Proxy Statement/Prospectus.

This communication references a Proxy Statement and a Proxy Statement/Prospectus to be filed by the Funds.
The Proxy Statement and Proxy Statement/Prospectus have yet to be filed with the U.S. Securities and Exchange Commission (“SEC”). After each Proxy Statement and Proxy Statement/Prospectus is filed with the SEC, it may be amended or
withdrawn. The Proxy Statement/Prospectus will not be distributed to shareholders of the Funds unless and until a Registration Statement comprising of the Proxy Statement/Prospectus is declared effective by the SEC.

The Funds and their trustees, directors, officers and employees, and BlackRock, and its shareholders, officers and employees and other persons may be deemed
to be participants in the solicitation of proxies with respect to the Reorganizations. Investors and shareholders may obtain more detailed information regarding the direct and indirect interests of each Fund’s trustees, directors, officers and
employees, and BlackRock and its shareholders, officers and employees and other persons by reading each Proxy Statement and Proxy Statement/Prospectus when it is filed with the SEC. INVESTORS AND SECURITY HOLDERS OF THE FUNDS ARE URGED TO READ THE
PROXY STATEMENT AND THE PROXY STATEMENT/PROSPECTUS AND OTHER DOCUMENTS FILED WITH THE SEC CAREFULLY AND IN THEIR ENTIRETY WHEN THEY BECOME AVAILABLE BECAUSE THESE DOCUMENTS WILL CONTAIN IMPORTANT INFORMATION ABOUT THE REORGANIZATIONS. INVESTORS
SHOULD CONSIDER THE INVESTMENT OBJECTIVE, RISKS, CHARGES AND EXPENSES OF THE FUNDS CAREFULLY. THE PROXY STATEMENT AND THE PROXY STATEMENT/PROSPECTUS WILL