# EDGAR Filing Document

**Accession Number:** 0000893818
**File Stem:** 0001193125-26-084746
**Filing Date:** 2026-3
**Character Count:** 6283
**Document Hash:** 7f832bd594853a0da5c1a5c9c955181f
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001193125-26-084746.hdr.sgml**: 20260302

**ACCESSION NUMBER**: 0001193125-26-084746

**CONFORMED SUBMISSION TYPE**: 497J

**PUBLIC DOCUMENT COUNT**: 1

**FILED AS OF DATE**: 20260302

**DATE AS OF CHANGE**: 20260302

**EFFECTIVENESS DATE**: 20260302

**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:** 497J
- **SEC ACT:** 1933 Act
- **SEC FILE NUMBER:** 033-54126
- **FILM NUMBER:** 26705512

**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 LifePath ESG Index Retirement Fund (Series ID: S000069122)

| Class ID   | Class Name    | Ticker Symbol   |
|:---|:---|:---|
| C000220929 | Class K       |  |
| C000220930 | Institutional |  |
| C000220931 | Investor A    |  |

### BlackRock LifePath ESG Index 2065 Fund (Series ID: S000069123)

| Class ID   | Class Name    | Ticker Symbol   |
|:---|:---|:---|
| C000220932 | Investor A    |  |
| C000220933 | Class K       |  |
| C000220934 | Institutional |  |

### BlackRock LifePath ESG Index 2030 Fund (Series ID: S000069125)

| Class ID   | Class Name    | Ticker Symbol   |
|:---|:---|:---|
| C000220938 | Institutional |  |
| C000220939 | Investor A    |  |
| C000220940 | Class K       |  |

### BlackRock LifePath ESG Index 2035 Fund (Series ID: S000069126)

| Class ID   | Class Name    | Ticker Symbol   |
|:---|:---|:---|
| C000220941 | Institutional |  |
| C000220942 | Investor A    |  |
| C000220943 | Class K       |  |

### BlackRock LifePath ESG Index 2040 Fund (Series ID: S000069127)

| Class ID   | Class Name    | Ticker Symbol   |
|:---|:---|:---|
| C000220944 | Institutional |  |
| C000220945 | Class K       |  |
| C000220946 | Investor A    |  |

### BlackRock LifePath ESG Index 2045 Fund (Series ID: S000069128)

| Class ID   | Class Name    | Ticker Symbol   |
|:---|:---|:---|
| C000220947 | Investor A    |  |
| C000220948 | Institutional |  |
| C000220949 | Class K       |  |

### BlackRock LifePath ESG Index 2050 Fund (Series ID: S000069129)

| Class ID   | Class Name    | Ticker Symbol   |
|:---|:---|:---|
| C000220950 | Investor A    |  |
| C000220951 | Institutional |  |
| C000220952 | Class K       |  |

### BlackRock LifePath ESG Index 2055 Fund (Series ID: S000069130)

| Class ID   | Class Name    | Ticker Symbol   |
|:---|:---|:---|
| C000220953 | Investor A    |  |
| C000220954 | Class K       |  |
| C000220955 | Institutional |  |

### BlackRock LifePath ESG Index 2060 Fund (Series ID: S000069131)

| Class ID   | Class Name    | Ticker Symbol   |
|:---|:---|:---|
| C000220956 | Institutional |  |
| C000220957 | Class K       |  |
| C000220958 | Investor A    |  |

### BlackRock LifePath ESG Index 2070 Fund (Series ID: S000086332)

| Class ID   | Class Name    | Ticker Symbol   |
|:---|:---|:---|
| C000251817 | Institutional |  |
| C000251818 | Investor A    |  |
| C000251819 | Class K       |  |

March 2, 2026

**VIA ELECTRONIC FILING** 

Securities and Exchange Commission

100 F Street, N.E.

Washington, D.C. 20549

Attention: Division of Investment Management

RE: BlackRock LifePath<sup>®</sup> ESG Index Retirement Fund, BlackRock LifePath<sup>®</sup> ESG

Index 2030 Fund, BlackRock LifePath<sup>®</sup> ESG Index 2035 Fund, BlackRock

LifePath<sup>®</sup> ESG Index 2040 Fund, BlackRock LifePath<sup>®</sup> ESG Index 2045 Fund,

BlackRock LifePath<sup>®</sup> ESG Index 2050 Fund, BlackRock LifePath<sup>®</sup> ESG Index 2055

Fund, BlackRock LifePath<sup>®</sup> ESG Index 2060 Fund, BlackRock LifePath<sup>®</sup> ESG Index

2065 Fund, BlackRock LifePath<sup>®</sup> ESG Index 2070 Fund, each a series of BlackRock

Funds III

Post-Effective Amendment No. 405 to the Registration Statement on Form N-1A<u> </u>

<u>(Securities Act File No.</u> <u>33-54126, Investment Company Act File No.</u> <u>811-07332)</u>

Ladies and Gentlemen:

Pursuant to Rule 497(j) under the Securities Act of 1933, as amended (the "1933 Act"), BlackRock Funds III (the "Registrant"), on behalf of its series, BlackRock LifePath<sup>®</sup> ESG Index Retirement Fund, BlackRock LifePath<sup>®</sup> ESG Index 2030 Fund, BlackRock LifePath<sup>®</sup> ESG Index 2035 Fund, BlackRock LifePath<sup>®</sup> ESG Index 2040 Fund, BlackRock LifePath<sup>®</sup> ESG Index 2045 Fund, BlackRock LifePath<sup>®</sup> ESG Index 2050 Fund, BlackRock LifePath<sup>®</sup> ESG Index 2055 Fund, BlackRock LifePath<sup>®</sup> ESG Index 2060 Fund, BlackRock LifePath<sup>®</sup> ESG Index 2065 Fund, BlackRock LifePath<sup>®</sup> ESG Index 2070 Fund (collectively, the "Funds"), hereby certifies that:

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(1) the forms of Prospectuses and Statement of Additional Information that would have been filed pursuant to Rule 497(c) under the 1933 Act would not have differed from that contained in Post-Effective Amendment No. 405 to the Registration Statement on Form N-1A of the Registrant under the 1933 Act with respect to the Funds; and

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(2) the text of Post-Effective Amendment No. 405 to the Registration Statement on Form N-1A of the Registrant under the 1933 Act with respect to the Funds was filed electronically with the Securities and Exchange Commission on February 25, 2026.

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| |
|:---|
| Sincerely, |
| BlackRock Funds III |
| /s/ Janey Ahn |
| Janey Ahn |
| Secretary of the Registrant |

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