Company: MYI
Filing Date: 2025-09-05
Form Type: 424B3
Source: 0001193125-25-196285
Chunk: 35

Company: BLACKROCK MUNIYIELD QUALITY FUND III, INC.
Filing Date: 2025-09-05
Form: 424B3
Chunk 35
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 nominee) and want to attend the Special Meeting you must register in advance of the Special Meeting. To register, you must submit proof of your proxy power (legal proxy), which you can obtain from your financial intermediary or other nominee, reflecting your Fund holdings along with your name and email address to Georgeson LLC, each Fund’s tabulator. You may email an image of your legal proxy to shareholdermeetings@computershare.com. Requests for registration must be received no later than 5:00 p.m. (Eastern Time) three business days prior to the Special Meeting date. You will receive a confirmation email from Georgeson LLC of your registration and a control number and security code that will allow you to vote at the Special Meeting.

Even if you plan to attend the Special Meeting, please promptly follow the enclosed instructions to submit voting instructions by telephone or via the Internet. Alternatively, you may submit voting instructions by signing and dating each proxy card or voting instruction form you receive, and if received by mail, returning it in the accompanying postage-paid return envelope.

The officers or directors of
each Fund named as proxies by shareholders may participate in the Special Meeting by remote communications, including, without limitation, by means of a conference telephone or similar

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communications equipment by means of which all persons participating in the Special Meeting can hear and be heard by each other, and the participation of such officers, directors or trustees in
the Special Meeting pursuant to any such communications system shall constitute presence at the Special Meeting.

THE BOARD OF DIRECTORS (EACH, A “BOARD”) OF EACH OF THE FUNDS RECOMMENDS THAT YOU VOTE YOUR SHARES BY INDICATING YOUR VOTING INSTRUCTIONS ON THE ENCLOSED PROXY CARD, DATING AND SIGNING SUCH PROXY CARD AND RETURNING IT IN THE ENVELOPE PROVIDED, WHICH IS ADDRESSED FOR YOUR CONVENIENCE AND NEEDS NO POSTAGE IF MAILED IN THE UNITED STATES, OR BY RECORDING YOUR VOTING INSTRUCTIONS BY TELEPHONE OR VIA THE INTERNET.

THE BOARD OF EACH FUND UNANIMOUSLY RECOMMENDS THAT YOU CAST YOUR VOTE FORTHE APPLICABLE REORGANIZATION AGREEMENT AND FORTHE ISSUANCE OF ADDITIONAL COMMON SHARES OF THE ACQUIRING FUND, AS APPLICABLE, IN EACH CASE, AS DESCRIBED IN THE JOINT PROXY STATEMENT/PROSPECTUS FOR COMMON SHAREHOLDERS OR THE PROXY STATEMENT FOR PREFERRED SHAREHOLDERS