Company: MYI
Filing Date: 2025-09-08
Form Type: DEF 14A
Source: 0001193125-25-198172
Chunk: 4

Company: BLACKROCK MUNIYIELD QUALITY FUND III, INC.
Filing Date: 2025-09-08
Form: DEF 14A
Chunk 4
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 common shares will be voted “FOR” the proposal. If your common shares are held through a broker, you must provide voting instructions to your broker about how to vote your common shares in order for your broker to vote your common shares as you instruct at the Special Meeting.

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September 8, 2025 IMPORTANT NOTICE TO COMMON SHAREHOLDERS OFBLACKROCK MUNIVEST FUND II, INC. BLACKROCK MUNIYIELD MICHIGAN QUALITY FUND, INC. BLACKROCK MUNIVEST FUND, INC. BLACKROCK MUNIYIELD QUALITY FUND III, INC. QUESTIONS & ANSWERS Although we urge you to read the entire Proxy Statement, we have provided for your convenience a brief overview of some of the important questions concerning the joint special shareholder meeting (the “Special Meeting”) of BlackRock MuniVest Fund II, Inc. (“MVT”), BlackRock MuniYield Michigan Quality Fund, Inc. (“MIY”) and BlackRock MuniVest Fund, Inc. (“MVF”) (collectively, the “Target Funds”) 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”) and the proposals to be voted on. It is expected that the effective dates (collectively, the “Closing Date”) of the Reorganizations will be sometime during the fourth quarter of 2025, but they may be at a different time as described in the Proxy Statement. The enclosed Proxy Statement is being sent only to the holders of Variable Rate Demand Preferred Shares (“VRDP Shares” and the holders thereof, “VRDP Holders,”) of the Acquiring Fund and MIY, and the holders of Variable Rate Muni Term Preferred Shares (“VMTP Shares” and the holders thereof, “VMTP Holders”) of MVT and MVF. Each Fund is separately soliciting the votes of its holders of common shares (together with VRDP Shares and VMTP Shares of each Fund, the “Shares”) through a separate proxy statement.

| Q: | Why is a shareholder meeting being held? |

A: Preferred Shareholders of BlackRock MuniVest Fund II, Inc. (NYSE Ticker: MVT): You and the common shareholders are being asked to vote as a single class on a proposal to approve an Agreement and