# EDGAR Filing Document

**Accession Number:** 0000355437
**File Stem:** 0001410368-25-040484
**Filing Date:** 2025-12
**Character Count:** 13514
**Document Hash:** e8a35ff12d9264e7754c0f68c7cc2ef5
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001410368-25-040484.hdr.sgml**: 20251222

**ACCESSION NUMBER**: 0001410368-25-040484

**CONFORMED SUBMISSION TYPE**: NPORT-P

**PUBLIC DOCUMENT COUNT**: 1

**CONFORMED PERIOD OF REPORT**: 20251031

**FILED AS OF DATE**: 20251222

**DATE AS OF CHANGE**: 20251222

**PERIOD START**: 20251031

**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:** NPORT-P
- **SEC ACT:** 1940 Act
- **SEC FILE NUMBER:** 811-03258
- **FILM NUMBER:** 251590389

**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

### Dimensional VIT Inflation-Protected Securities Portfolio (Series ID: S000049213)

| Class ID   | Class Name          | Ticker Symbol   |
|:---|:---|:---|
| C000155213 | Institutional Class |  |

## Form NPORT-P: Monthly Portfolio Investments Report

### NPORT-P: Part A: General Information

**Item A.1. Information about the Registrant.**

- **a. Name of Registrant:** DFA INVESTMENT DIMENSIONS GROUP INC

- **b. Investment Company Act file number:** 811-03258

- **c. CIK number of Registrant:** 0000355437

- **d. LEI of Registrant:** 549300XGRTBJCE41BD26

- **e. Address and telephone number of Registrant.**

  - **Street Address 1:** 6300 BEE CAVE ROAD

  - **City:** AUSTIN

  - **State:** TX

  - **Foreign country:** US

  - **Zip / Postal Code:** 78746

  - **Telephone number:** 512-306-7400

**Item A.2. Information about the Series.**

- **a. Name of Series:** Dimensional VIT Inflation-Protected Securities Portfolio

- **b. EDGAR series identifier (if any):** S000049213

- **c. LEI of Series:** 549300GSTO7CI0MS1Z05

**Item A.3. Reporting period.**

- **a. Date of fiscal year-end:** 2025-10-31

- **b. Date as of which information is reported:** 2025-10-31

**Item A.4. Final filing**

Does the Fund anticipate that this will be its final filing on Form N-PORT? **No**

### Fund Information

**Total Assets:** $229539518.16

**Total Liabilities:** $30826.08

**Net Assets:** $229508692.08

**Currency Risk Metrics (dv01):**

- 

**Credit Spread Risk - Investment Grade (dv01):**

- **3-Month:** 0.00000000 | **1-Year:** 0.00000000 | **5-Year:** 0.00000000 | **10-Year:** 0.00000000 | **30-Year:** 0.00000000

**Credit Spread Risk - Non-Investment Grade (dv01):**

- **3-Month:** 0.00000000 | **1-Year:** 0.00000000 | **5-Year:** 0.00000000 | **10-Year:** 0.00000000 | **30-Year:** 0.00000000

**Monthly Return Information**

| Class               | Month 1 Return (%)   | Month 2 Return (%)   | Month 3 Return (%)   |
|:---|:---|:---|:---|
| Class ID C000155213 | 1.80%                | 0.21%                | 0.31%                |

**Monthly Gains & Losses**

| Period   | Net Realized Gain/Loss   | Net Unrealized Appreciation/Depreciation   |
|:---|:---|:---|
| Month 1  | $-53118.63               | $3063302.19                                |
| Month 2  | $-20831.05               | $-101450.56                                |
| Month 3  | $-13876.11               | $-276968.09                                |

### Schedule of Portfolio Investments

| Name                         | Title                                                        | Identifiers                                   | Payoff Profile   | Asset Category   | Issuer Category   | Country   |   Balance | Units   | Value (USD)   | % of Net Assets   | Maturity Date   | Coupon Type   | Annualized Rate (%)   | Restricted?   |   Fair Value Level | Lending Status   |
|:---|:---|:---|:---|:---|:---|:---|---:|:---|:---|:---|:---|:---|:---|:---|---:|:---|
| State Street Global Advisors | State Street Institutional U.S. Government Money Market Fund | CUSIP: 857492706<br>LEI: 549300BZ5TGIFZUZDZ37 | Long             | STIV             | RF                | US        |   2507860 | NS      | $2507859.89   | 1.09%             |  |  |  | No            |                  1 | On Loan: No      |
| United States Treasury       | U.S. Treasury Inflation-Indexed Bonds                        | CUSIP: 912810FH6<br>LEI: 254900HROIFWPRGM1V77 | Long             | DBT              | UST               | US        |  16237332 | PA      | $17649446.65  | 7.69%             | 2029-04-15      | Fixed         | 3.88%                 | No            |                  2 | On Loan: No      |
| United States Treasury       | U.S. Treasury Inflation-Indexed Bonds                        | CUSIP: 912810FQ6<br>LEI: 254900HROIFWPRGM1V77 | Long             | DBT              | UST               | US        |  12811851 | PA      | $14285142.10  | 6.22%             | 2032-04-15      | Fixed         | 3.38%                 | No            |                  2 | On Loan: No      |
| United States Treasury       | U.S. Treasury Inflation-Indexed Bonds                        | CUSIP: 912810PZ5<br>LEI: 254900HROIFWPRGM1V77 | Long             | DBT              | UST               | US        |  14258443 | PA      | $14825370.39  | 6.46%             | 2029-01-15      | Fixed         | 2.50%                 | No            |                  2 | On Loan: No      |
| United States Treasury       | U.S. Treasury Inflation-Indexed Bonds                        | CUSIP: 912810QF8<br>LEI: 254900HROIFWPRGM1V77 | Long             | DBT              | UST               | US        |  10491460 | PA      | $10591381.61  | 4.61%             | 2040-02-15      | Fixed         | 2.13%                 | No            |                  2 | On Loan: No      |
| United States Treasury       | U.S. Treasury Inflation-Indexed Bonds                        | CUSIP: 912810QP6<br>LEI: 254900HROIFWPRGM1V77 | Long             | DBT              | UST               | US        |  11538306 | PA      | $11562320.68  | 5.04%             | 2041-02-15      | Fixed         | 2.13%                 | No            |                  2 | On Loan: No      |
| United States Treasury       | U.S. Treasury Inflation-Indexed Bonds                        | CUSIP: 912810QV3<br>LEI: 254900HROIFWPRGM1V77 | Long             | DBT              | UST               | US        |   9318660 | PA      | $7437906.63   | 3.24%             | 2042-02-15      | Fixed         | 0.75%                 | No            |                  2 | On Loan: No      |
| United States Treasury       | U.S. Treasury Inflation-Indexed Bonds                        | CUSIP: 912810RA8<br>LEI: 254900HROIFWPRGM1V77 | Long             | DBT              | UST               | US        |   8454060 | PA      | $6474205.97   | 2.82%             | 2043-02-15      | Fixed         | 0.63%                 | No            |                  2 | On Loan: No      |
| United States Treasury       | U.S. Treasury Inflation-Indexed Bonds                        | CUSIP: 912810RF7<br>LEI: 254900HROIFWPRGM1V77 | Long             | DBT              | UST               | US        |   9173802 | PA      | $7912685.40   | 3.45%             | 2044-02-15      | Fixed         | 1.38%                 | No            |                  2 | On Loan: No      |
| United States Treasury       | U.S. Treasury Inflation-Indexed Bonds                        | CUSIP: 912810RL4<br>LEI: 254900HROIFWPRGM1V77 | Long             | DBT              | UST               | US        |   2063520 | PA      | $1555219.70   | 0.68%             | 2045-02-15      | Fixed         | 0.75%                 | No            |                  2 | On Loan: No      |
| United States Treasury       | U.S. Treasury Inflation-Indexed Notes                        | CUSIP: 9128285W6<br>LEI: 254900HROIFWPRGM1V77 | Long             | DBT              | UST               | US        |  18474336 | PA      | $18270675.66  | 7.96%             | 2029-01-15      | Fixed         | 0.88%                 | No            |                  2 | On Loan: No      |
| United States Treasury       | U.S. Treasury Inflation-Indexed Notes                        | CUSIP: 9128287D6<br>LEI: 254900HROIFWPRGM1V77 | Long             | DBT              | UST               | US        |   3356040 | PA      | $3246835.52   | 1.41%             | 2029-07-15      | Fixed         | 0.25%                 | No            |                  2 | On Loan: No      |
| United States Treasury       | U.S. Treasury Inflation-Indexed Notes                        | CUSIP: 912828Y38<br>LEI: 254900HROIFWPRGM1V77 | Long             | DBT              | UST               | US        |   6259119 | PA      | $6206594.54   | 2.70%             | 2028-07-15      | Fixed         | 0.75%                 | No            |                  2 | On Loan: No      |
| United States Treasury       | U.S. Treasury Inflation-Indexed Notes                        | CUSIP: 912828Z37<br>LEI: 254900HROIFWPRGM1V77 | Long             | DBT              | UST               | US        |  20460375 | PA      | $19491862.28  | 8.49%             | 2030-01-15      | Fixed         | 0.13%                 | No            |                  2 | On Loan: No      |
| United States Treasury       | U.S. Treasury Inflation-Indexed Notes                        | CUSIP: 912828ZZ6<br>LEI: 254900HROIFWPRGM1V77 | Long             | DBT              | UST               | US        |   6822792 | PA      | $6473804.48   | 2.82%             | 2030-07-15      | Fixed         | 0.13%                 | No            |                  2 | On Loan: No      |
| United States Treasury       | U.S. Treasury Inflation-Indexed Notes                        | CUSIP: 91282CBF7<br>LEI: 254900HROIFWPRGM1V77 | Long             | DBT              | UST               | US        |  23039377 | PA      | $21600687.73  | 9.41%             | 2031-01-15      | Fixed         | 0.13%                 | No            |                  2 | On Loan: No      |
| United States Treasury       | U.S. Treasury Inflation-Indexed Notes                        | CUSIP: 91282CCM1<br>LEI: 254900HROIFWPRGM1V77 | Long             | DBT              | UST               | US        |  19036395 | PA      | $17746391.79  | 7.73%             | 2031-07-15      | Fixed         | 0.13%                 | No            |                  2 | On Loan: No      |
| United States Treasury       | U.S. Treasury Inflation-Indexed Notes                        | CUSIP: 91282CDX6<br>LEI: 254900HROIFWPRGM1V77 | Long             | DBT              | UST               | US        |  20451025 | PA      | $18803795.56  | 8.19%             | 2032-01-15      | Fixed         | 0.13%                 | No            |                  2 | On Loan: No      |
| United States Treasury       | U.S. Treasury Inflation-Indexed Notes                        | CUSIP: 91282CEZ0<br>LEI: 254900HROIFWPRGM1V77 | Long             | DBT              | UST               | US        |   1951162 | PA      | $1844244.30   | 0.80%             | 2032-07-15      | Fixed         | 0.63%                 | No            |                  2 | On Loan: No      |
| United States Treasury       | U.S. Treasury Inflation-Indexed Notes                        | CUSIP: 91282CGK1<br>LEI: 254900HROIFWPRGM1V77 | Long             | DBT              | UST               | US        |   4023824 | PA      | $3894660.74   | 1.70%             | 2033-01-15      | Fixed         | 1.13%                 | No            |                  2 | On Loan: No      |
| United States Treasury       | U.S. Treasury Inflation-Indexed Notes                        | CUSIP: 91282CHP9<br>LEI: 254900HROIFWPRGM1V77 | Long             | DBT              | UST               | US        |   2666600 | PA      | $2623611.13   | 1.14%             | 2033-07-15      | Fixed         | 1.38%                 | No            |                  2 | On Loan: No      |
| United States Treasury       | U.S. Treasury Inflation-Indexed Notes                        | CUSIP: 91282CJY8<br>LEI: 254900HROIFWPRGM1V77 | Long             | DBT              | UST               | US        |   6639318 | PA      | $6664172.88   | 2.90%             | 2034-01-15      | Fixed         | 1.75%                 | No            |                  2 | On Loan: No      |
| United States Treasury       | U.S. Treasury Inflation-Indexed Notes                        | CUSIP: 91282CLE9<br>LEI: 254900HROIFWPRGM1V77 | Long             | DBT              | UST               | US        |   4645755 | PA      | $4710883.14   | 2.05%             | 2034-07-15      | Fixed         | 1.88%                 | No            |                  2 | On Loan: No      |
| United States Treasury       | U.S. Treasury Inflation-Indexed Notes                        | CUSIP: 91282CML2<br>LEI: 254900HROIFWPRGM1V77 | Long             | DBT              | UST               | US        |   2566225 | PA      | $2640208.96   | 1.15%             | 2035-01-15      | Fixed         | 2.13%                 | No            |                  2 | On Loan: No      |

### Signature

**Date Signed:** 2025-11-19

**Name of Applicant:** DFA INVESTMENT DIMENSIONS GROUP INC

**Signature:** Randy Olson

**Name of Signer:** Randy Olson

**Title:** Vice President