# EDGAR Filing Document

**Accession Number:** 0000857114
**File Stem:** 0000030146-25-000120
**Filing Date:** 2025-11
**Character Count:** 5420
**Document Hash:** 9a4abfca44e802f8b46c652746dfb8e7
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0000030146-25-000120.hdr.sgml**: 20251114

**ACCESSION NUMBER**: 0000030146-25-000120

**CONFORMED SUBMISSION TYPE**: 497

**PUBLIC DOCUMENT COUNT**: 19

**FILED AS OF DATE**: 20251114

**DATE AS OF CHANGE**: 20251114

**EFFECTIVENESS DATE**: 20251114

**FILER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** BNY MELLON INDEX FUNDS, INC.
- **CENTRAL INDEX KEY:** 0000857114

**ORGANIZATION NAME:**
- **EIN:** 133554128
- **FISCAL YEAR END:** 1031

**FILING VALUES:**
- **FORM TYPE:** 497
- **SEC ACT:** 1933 Act
- **SEC FILE NUMBER:** 033-31809
- **FILM NUMBER:** 251482214

**BUSINESS ADDRESS:**
- **STREET 1:** C/O BNY MELLON INVESTMENT ADVISER, INC.
- **STREET 2:** 240 GREENWICH STREET
- **CITY:** NEW YORK
- **STATE:** NY
- **ZIP:** 10286
- **BUSINESS PHONE:** 2129226400

**MAIL ADDRESS:**
- **STREET 1:** C/O BNY MELLON INVESTMENT ADVISER, INC.
- **STREET 2:** 240 GREENWICH STREET
- **CITY:** NEW YORK
- **STATE:** NY
- **ZIP:** 10286

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** DREYFUS INDEX FUNDS, INC.
- **DATE OF NAME CHANGE:** 20181030

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** DREYFUS INDEX FUNDS INC
- **DATE OF NAME CHANGE:** 20010613

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** DREYFUS S&P 500 INDEX FUND
- **DATE OF NAME CHANGE:** 19951228

## Series and Classes Contracts Data

### BNY Mellon S&P 500 Index Fund (Series ID: S000000131)

---

|  |  |  |
|:---|:---|:---|
| Class Name                    | Ticker Symbol | Class ID   |
| BNY Mellon S&P 500 Index Fund | PEOPX         | C000000295 |

---

## Series and Classes Contracts Data

### BNY Mellon S&P 500 Index Fund (Series ID: S000000131)

| Class ID   | Class Name                    | Ticker Symbol   |
|:---|:---|:---|
| C000000295 | BNY Mellon S&P 500 Index Fund | PEOPX           |

?xml version='1.0' encoding='ASCII'? Untitled Document

November 14, 2025

#### BNY MELLON INDEX FUNDS

#### BNY Mellon S&P 500 Index Fund

#### Supplement to Current Summary Prospectus and Prospectus
**The following information supplements the information in the sections "Principal Investment Strategy" in the summary prospectus and "Fund Summary – Principal Investment Strategy" in the prospectus:**

The fund may operate as a non-diversified fund, as defined under the Investment Company Act of 1940, as amended, to the approximate extent the S&P 500<sup>®</sup> Index is non-diversified, without shareholder approval. The fund may therefore operate as non-diversified solely as a result of a change in relative market capitalization or index weighting of one or more constituents of the index.

\*\*\*\*\*\*\*\*\*

#### The following information supplements the information in the sections "Principal Risks" in the summary prospectus and "Fund Summary – Principal Risks" in the prospectus:
&nbsp;&nbsp;&nbsp;&nbsp;● *Non-diversification risk.* Because the fund seeks to closely track the composition of the index, from time to time, more than 25% of the fund's total assets may be invested in issuers representing more than 5% of the fund's total assets due to an index rebalance or market movement, which would result in the fund being non-diversified under the Investment Company Act of 1940, as amended. A non-diversified fund may invest a greater portion of its assets in securities of a smaller number of individual issuers than a diversified fund. As a result, the fund's performance may be more vulnerable to changes in the market value of a single issuer or group of issuers and more susceptible to risks associated with a single economic, political or regulatory occurrence than a diversified fund.

\*\*\*\*\*\*\*\*\*

#### The following information supplements the information in the section "Fund Details – Goal and Approach – BNY Mellon S&P 500 Index Fund" in the prospectus:
The fund may operate as a non-diversified fund, as defined under the Investment Company Act of 1940, as amended, to the approximate extent the S&P 500<sup>®</sup> Index is non-diversified, without shareholder approval. The fund may therefore operate as non-diversified solely as a result of a change in relative market capitalization or index weighting of one or more constituents of the index. As a result, the fund may invest a significant percentage of its assets in a single issuer or small number of issuers.

\*\*\*\*\*\*\*\*\*

**The following information supplements the information in the section "Fund Details – Investment Risks" in the prospectus:**

BNY Mellon S&P 500 Index Fund also is subject to the following principal risk:

&nbsp;&nbsp;&nbsp;&nbsp;● *Non-diversification risk.* Because the fund seeks to closely track the composition of the index, from time to time, more than 25% of the fund's total assets may be invested in issuers

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representing more than 5% of the fund's total assets due to an index rebalance or market movement, which would result in the fund being non-diversified under the Investment Company Act of 1940, as amended. A non-diversified fund may invest a greater portion of its assets in securities of a smaller number of individual issuers than a diversified fund. As a result, the fund's performance may be more vulnerable to changes in the market value of a single issuer or group of issuers and more susceptible to risks associated with a single economic, political or regulatory occurrence than a diversified fund.

\*\*\*\*\*\*\*\*\*

0078STK1125

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