# EDGAR Filing Document

**Accession Number:** 0000893818
**File Stem:** 0001193125-25-168038
**Filing Date:** 2025-7
**Character Count:** 2733
**Document Hash:** cbdb01d23246719952dd79f0a9d6fce9
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001193125-25-168038.hdr.sgml**: 20250729

**ACCESSION NUMBER**: 0001193125-25-168038

**CONFORMED SUBMISSION TYPE**: 497

**PUBLIC DOCUMENT COUNT**: 1

**FILED AS OF DATE**: 20250729

**DATE AS OF CHANGE**: 20250729

**EFFECTIVENESS DATE**: 20250729

**FILER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** BlackRock Funds III
- **CENTRAL INDEX KEY:** 0000893818

**ORGANIZATION NAME:**
- **EIN:** 000000000
- **STATE OF INCORPORATION:** DE
- **FISCAL YEAR END:** 1231

**FILING VALUES:**
- **FORM TYPE:** 497
- **SEC ACT:** 1933 Act
- **SEC FILE NUMBER:** 033-54126
- **FILM NUMBER:** 251162299

**BUSINESS ADDRESS:**
- **STREET 1:** 400 HOWARD STREET
- **CITY:** SAN FRANCISCO
- **STATE:** CA
- **ZIP:** 94105
- **BUSINESS PHONE:** 8006439691

**MAIL ADDRESS:**
- **STREET 1:** 400 HOWARD STREET
- **CITY:** SAN FRANCISCO
- **STATE:** CA
- **ZIP:** 94105

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** BARCLAYS GLOBAL INVESTORS FUNDS
- **DATE OF NAME CHANGE:** 20060201

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** BARCLAYS GLOBAL INVESTORS FUNDS INC
- **DATE OF NAME CHANGE:** 19990804

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** MASTERWORKS FUNDS INC
- **DATE OF NAME CHANGE:** 19960607

## Series and Classes Contracts Data

### BlackRock Diversified Fixed Income Fund (Series ID: S000079204)

---

|  |  |
|:---|:---|
| Class Name           | Class ID   |
| Institutional Shares | C000244506 |
| Class K Shares       | C000244507 |

---

## Series and Classes Contracts Data

### BlackRock Diversified Fixed Income Fund (Series ID: S000079204)

| Class ID   | Class Name           | Ticker Symbol   |
|:---|:---|:---|
| C000244506 | Institutional Shares |  |
| C000244507 | Class K Shares       |  |

**BlackRock Funds III** 

BlackRock Diversified Fixed Income Fund

(the "Fund")

**Supplement dated July 29, 2025** 

**to the Statement of Additional Information of the Fund,** 

**dated February 28, 2025, as amended or supplemented to date** 

**Effective immediately, the Fund's Statement of Additional Information is amended as follows:** 

The chart listing investments and investment strategies in the section entitled "I: Investment Objectives and Policies" is amended in relevant part to reflect that the Fund may invest in trust preferred securities, as follows:

---

| | | |
|:---|:---|:---|
| | **BlackRock**<br> **Diversified Fixed**<br> **Income Fund** | **BlackRock**<br> **Diversified Fixed**<br> **Income Fund** |
| **Preferred Stock** | | X |
| &nbsp;&nbsp;&nbsp;&nbsp; Tax-Exempt Preferred Shares | | |
| &nbsp;&nbsp;&nbsp;&nbsp; Trust Preferred Securities | | X |

---

**Shareholders should retain this Supplement for future reference.** 

SAI-DFI-0725SUP