Company: MYI
Filing Date: 2025-09-05
Form Type: 424B3
Source: 0001193125-25-196285
Chunk: 246

Company: BLACKROCK MUNIYIELD QUALITY FUND III, INC.
Filing Date: 2025-09-05
Form: 424B3
Chunk 246
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“Acquiring Funds AMPS Series F Shares”), 2,400 shares of Auction Market Preferred Stock, Series G, par value $0.10, with a liquidation preference of $25,000, plus an amount equal to all accumulated but unpaid dividends (whether or not
earned or declared) (the “Acquiring Funds AMPS Series G Shares”), 2,600 shares of Auction Market Preferred Stock, Series H, par value $0.10, with a liquidation preference of $25,000, plus an amount equal to all accumulated but unpaid
dividends (whether or not earned or declared) (the “Acquiring Funds AMPS Series H Shares”), and 3,564 shares of Series W-7 Variable Rate Demand Preferred Shares, par value $0.10, with a liquidation
preference of $100,000 (the “Acquiring Fund VRDP Shares”).

137

INFORMATION ABOUT THE PREFERRED SHARES OF THE FUNDS The Board of each Fund is authorized, however, to reclassify any unissued common shares to preferred shares without the approval of its common shareholders. Set forth below is information about each Fund’s outstanding preferred shares as of July 31, 2025.

| Fund                 |     | Title of 
 Class    |             |     |     Amount 
 Authorized |     | Amount     
 Authorized 
 Under Each 
 Series     |                  |     | Amount       
 Held by Fund 
 for its Own  
 Account      |   |     | Amount       
 Outstanding  
 Exclusive of 
 Amount       
 Shown in     
 Previous     
 Column       |       |     | Issue Date |                         |     | Mandatory/ 
 Term       
 Redemption 
 Date       |              |
| MVT                  |     |          | VMTP Shares |     |        777 |     |            | Series W-7 777   |     |              | 0 |     |              |   777 |     |            | 12/20/23                |     |            | July 2, 2026 |
| MIY                  |     |          | VRDP Shares |     |      2,319 |     |            | Series W-7 2,319 |     |              | 0 |     |              | 2,319 |     |            | 4/21/11 (1,446 Shares); 
 9/14/15 (873 Shares)    |     |            | May 1, 2041  |
| MVF                  |