Company: MYI
Filing Date: 2025-07-16
Form Type: N-14 8C
Source: 0001193125-25-159991
Chunk: 1

Company: BLACKROCK MUNIYIELD QUALITY FUND III, INC.
Filing Date: 2025-07-16
Form: N-14 8C
Chunk 1
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VT, MIY, MVF and MYI. |

| c. | Notice of Joint Special Meeting of Shareholders of MVT, MIY, MVF and MYI. |

| d. | Joint Proxy Statement/Prospectus regarding the proposed reorganizations of MVT, MIY and MVF into MYI. |

| e. | Statement of Additional Information regarding the proposed reorganizations of MVT, MIY and MVF into MYI. |

| f. | Part C: Other Information. |

| g. | Exhibits. |

BLACKROCK MUNIVEST FUND II, INC.

BLACKROCK MUNIYIELD MICHIGAN QUALITY FUND, INC.

BLACKROCK MUNIVEST FUND, INC.

BLACKROCK MUNIYIELD QUALITY FUND III, INC.

100 Bellevue Parkway

Wilmington, Delaware 19809

(800) 882-0052

[●], 2025

Dear Common
Shareholder:

You are cordially invited to attend a joint special shareholder meeting (the “Special Meeting”) of BlackRock
MuniVest Fund II, Inc. (“MVT”), BlackRock MuniYield Michigan Quality Fund, Inc. (“MIY”), BlackRock MuniVest Fund, Inc. (“MVF”) and BlackRock MuniYield Quality Fund III, Inc. (“MYI” or the “Acquiring
Fund” and collectively with MVT, MIY and MVF, the “Funds,” and each, a “Fund”), to be held on October 15, 2025 at [●] (Eastern Time). The Special Meeting will be held in a virtual meeting format only.
Shareholders will not have to travel to attend the Special Meeting, but will be able to view the Special Meeting live, have a meaningful opportunity to participate, including the ability to ask questions of management, and cast their votes by
accessing a web link. Before the Special Meeting, I would like to provide you with additional background information and ask for your vote on important proposals affecting the Funds.

Common Shareholders of MVT: You and the preferred shareholders of MVT are being asked to vote as a single class on a proposal to
approve an Agreement and Plan of Reorganization between MVT and the Acquiring Fund (the “MVT Reorganization Agreement”) and the transactions contemplated therein, including the termination of MVT’s registration under the Investment
Company Act of 1940