# EDGAR Filing Document

**Accession Number:** 0000355437
**File Stem:** 0002071844-26-000337
**Filing Date:** 2026-4
**Character Count:** 3031
**Document Hash:** e6c15967d48152a7c992878d71365067
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0002071844-26-000337.hdr.sgml**: 20260408

**ACCESSION NUMBER**: 0002071844-26-000337

**CONFORMED SUBMISSION TYPE**: 497

**PUBLIC DOCUMENT COUNT**: 2

**FILED AS OF DATE**: 20260408

**DATE AS OF CHANGE**: 20260408

**EFFECTIVENESS DATE**: 20260408

**FILER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** DFA INVESTMENT DIMENSIONS GROUP INC
- **CENTRAL INDEX KEY:** 0000355437

**ORGANIZATION NAME:**
- **EIN:** 363129984
- **STATE OF INCORPORATION:** MD
- **FISCAL YEAR END:** 1031

**FILING VALUES:**
- **FORM TYPE:** 497
- **SEC ACT:** 1933 Act
- **SEC FILE NUMBER:** 002-73948
- **FILM NUMBER:** 26848973

**BUSINESS ADDRESS:**
- **STREET 1:** 6300 BEE CAVE ROAD
- **STREET 2:** BUILDING ONE
- **CITY:** AUSTIN
- **STATE:** TX
- **ZIP:** 78746
- **BUSINESS PHONE:** (512) 306-7400

**MAIL ADDRESS:**
- **STREET 1:** 6300 BEE CAVE ROAD
- **STREET 2:** BUILDING ONE
- **CITY:** AUSTIN
- **STATE:** TX
- **ZIP:** 78746

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** DFA SMALL CO FUND INC
- **DATE OF NAME CHANGE:** 19830621

## Series and Classes Contracts Data

### DFA INTERNATIONAL SMALL CAP VALUE PORTFOLIO (Series ID: S000000950)

---

|  |  |  |
|:---|:---|:---|
| Class Name                                                        | Ticker Symbol | Class ID   |
| DFA INTERNATIONAL SMALL CAP VALUE PORTFOLIO - INSTITUTIONAL CLASS | DISVX         | C000002701 |

---

### Emerging Markets Core Equity 2 Portfolio (Series ID: S000000978)

---

|  |  |  |
|:---|:---|:---|
| Class Name          | Ticker Symbol | Class ID   |
| Institutional Class | DFCEX         | C000002729 |

---

## Series and Classes Contracts Data

### DFA INTERNATIONAL SMALL CAP VALUE PORTFOLIO (Series ID: S000000950)

| Class ID   | Class Name                                                        | Ticker Symbol   |
|:---|:---|:---|
| C000002701 | DFA INTERNATIONAL SMALL CAP VALUE PORTFOLIO - INSTITUTIONAL CLASS | DISVX           |

### Emerging Markets Core Equity 2 Portfolio (Series ID: S000000978)

| Class ID   | Class Name          | Ticker Symbol   |
|:---|:---|:---|
| C000002729 | Institutional Class | DFCEX           |

**DFA INVESTMENT DIMENSIONS GROUP INC.**

DFA International Small Cap Value Portfolio

Emerging Markets Core Equity 2 Portfolio

SUPPLEMENT TO THE CURRENTLY EFFECTIVE STATEMENT OF ADDITIONAL INFORMATION DATED FEBRUARY 28, 2026, AS SUPPLEMENTED

The purpose of this Supplement is to update the Statement of Additional Information ("SAI") of the portfolios listed above, each a series of DFA Investment Dimensions Group Inc. The SAI is hereby revised as follows:

The following information is added to the table in the "Disclosure of Portfolio Holdings—Disclosure of Holdings Information to Recipients" section of the SAI:

---

| | | |
|:---|:---|:---|
|  **Recipient**  | **Business Purpose**  | **Frequency**  |
|  Gresham Technologies  | Monitoring investor exposure and investment strategy  | Monthly  |

---

*The date of this Supplement is April 8, 2026*

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