# EDGAR Filing Document

**Accession Number:** 0000355437
**File Stem:** 0001410368-25-040428
**Filing Date:** 2025-12
**Character Count:** 14745
**Document Hash:** 6968562748b5f622f8a897efe06fe8f0
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001410368-25-040428.hdr.sgml**: 20251222

**ACCESSION NUMBER**: 0001410368-25-040428

**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:** 251590322

**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 Inflation-Protected Securities Portfolio (Series ID: S000013345)

| Class ID   | Class Name                                                         | Ticker Symbol   |
|:---|:---|:---|
| C000036041 | DFA Inflation-Protected Securities Portfolio - 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:** DFA Inflation-Protected Securities Portfolio

- **b. EDGAR series identifier (if any):** S000013345

- **c. LEI of Series:** 549300TG645KDIW1X492

**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:** $5160378202.43

**Total Liabilities:** $612816.89

**Net Assets:** $5159765385.54

**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 C000036041 | 1.71%                | 0.33%                | 0.27%                |

**Monthly Gains & Losses**

| Period   | Net Realized Gain/Loss   | Net Unrealized Appreciation/Depreciation   |
|:---|:---|:---|
| Month 1  | $-1754372.95             | $67022664.34                               |
| Month 2  | $-2102485.27             | $7350261.62                                |
| Month 3  | $889877.15               | $-4860371.60                               |

### 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        |  19192559 | NS      | $19192559.49  | 0.37%             |  |  |  | No            |                  1 | On Loan: No      |
| United States Treasury       | U.S. Treasury Inflation-Indexed Bonds                        | CUSIP: 912810FD5<br>LEI: 254900HROIFWPRGM1V77 | Long             | DBT              | UST               | US        | 385554400 | PA      | $407616713.40 | 7.90%             | 2028-04-15      | Fixed         | 3.63%                 | No            |                  2 | On Loan: No      |
| United States Treasury       | U.S. Treasury Inflation-Indexed Bonds                        | CUSIP: 912810FH6<br>LEI: 254900HROIFWPRGM1V77 | Long             | DBT              | UST               | US        | 440900710 | PA      | $479244592.30 | 9.29%             | 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        | 274670025 | PA      | $306255539.72 | 5.94%             | 2032-04-15      | Fixed         | 3.38%                 | No            |                  2 | On Loan: No      |
| United States Treasury       | U.S. Treasury Inflation-Indexed Bonds                        | CUSIP: 912810PV4<br>LEI: 254900HROIFWPRGM1V77 | Long             | DBT              | UST               | US        |  59842197 | PA      | $60554451.99  | 1.17%             | 2028-01-15      | Fixed         | 1.75%                 | No            |                  2 | On Loan: No      |
| United States Treasury       | U.S. Treasury Inflation-Indexed Bonds                        | CUSIP: 912810PZ5<br>LEI: 254900HROIFWPRGM1V77 | Long             | DBT              | UST               | US        | 471509375 | PA      | $490256979.10 | 9.50%             | 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        | 407668160 | PA      | $411550828.25 | 7.98%             | 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        | 388774345 | PA      | $389583501.09 | 7.55%             | 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        | 283860720 | PA      | $226570078.85 | 4.39%             | 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        | 199374915 | PA      | $152683357.49 | 2.96%             | 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        | 149421775 | PA      | $128880860.71 | 2.50%             | 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        |  46773120 | PA      | $35251646.56  | 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        | 516383350 | PA      | $510690760.60 | 9.90%             | 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        | 152604815 | PA      | $147639124.52 | 2.86%             | 2029-07-15      | Fixed         | 0.25%                 | No            |                  2 | On Loan: No      |
| United States Treasury       | U.S. Treasury Inflation-Indexed Notes                        | CUSIP: 912828UH1<br>LEI: 254900HROIFWPRGM1V77 | Long             | DBT              | UST               | US        |       125 | PA      | $125.45       | 0.00%             | 2023-01-15      | Fixed         | 0.13%                 | No            |                  2 | On Loan: No      |
| United States Treasury       | U.S. Treasury Inflation-Indexed Notes                        | CUSIP: 912828Y38<br>LEI: 254900HROIFWPRGM1V77 | Long             | DBT              | UST               | US        |  52912140 | PA      | $52468118.78  | 1.02%             | 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        | 246783600 | PA      | $235101846.57 | 4.56%             | 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        | 116240160 | PA      | $110294446.76 | 2.14%             | 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        | 211553100 | PA      | $198342708.98 | 3.84%             | 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        | 143830540 | PA      | $134083849.07 | 2.60%             | 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        | 267616270 | PA      | $246061096.12 | 4.77%             | 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        |  62437200 | PA      | $59015817.51  | 1.14%             | 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        |  98964320 | PA      | $95787601.94  | 1.86%             | 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        |  29865920 | PA      | $29384444.63  | 0.57%             | 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        | 148594260 | PA      | $149150535.99 | 2.89%             | 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        |  38198430 | PA      | $38733928.06  | 0.75%             | 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        |  30794700 | PA      | $31682507.51  | 0.61%             | 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