Company: MYI
Filing Date: 2025-09-05
Form Type: 424B3
Source: 0001193125-25-196285
Chunk: 255

Company: BLACKROCK MUNIYIELD QUALITY FUND III, INC.
Filing Date: 2025-09-05
Form: 424B3
Chunk 255
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 of all dividends and/or
distributions, if applicable). The information for the six-month period ended January 31, 2025 is unaudited. The information for the remaining periods shown has been audited by Deloitte & Touche
LLP, MVT’s independent registered public accounting firm. Financial statements for the fiscal year ended July 31, 2024 and the Report of the Independent Registered Public Accounting Firm thereon appear in MVT’s Annual Report for the
fiscal year ended July 31, 2024 and financial statements for the six-month period ended January 31, 2025 appear in MVT’s most recent Semi-Annual Report, which is available upon request.

Please see next page for Financial Highlights Table

144

MVT Financial Highlights

|                                                                                             |     | MVT         
 Six Months  
 Ended       
 01/31/25    
 (unaudited) |         |      |     | Year Ended 
 07/31/24   |         |    |     | Year Ended 
 07/31/23   |         |    |     | Period from 
 05/01/22    
 to 07/31/22 |         |         |     | Year Ended 
 04/30/22   |         |    |     | Year Ended 
 04/30/21   |         |    |     | Year Ended 
 04/30/20   |         |    |
|:--------------------------------------------------------------------------------------------|:----|:------------|--------:|:-----|:----|:-----------|--------:|:---|:----|:-----------|--------:|:---|:----|:------------|--------:|:--------|:----|:-----------|--------:|:---|:----|:-----------|--------:|:---|:----|:-----------|--------:|:---|
| Net asset value, beginning of period                                                        |     | $           |   12.40 |      |     | $          |   12.36 |    |     | $          |   12.91 |    |     | $           |   12.91 |         |     | $          |   15.60 |    |     | $          |   13.60 |    |     | $          |   14.87 |    |
| Net investment income(a)                                                                    |     |             |    0.24 |      |     |