# EDGAR Filing Document

**Accession Number:** 0000355437
**File Stem:** 0001410368-26-065006
**Filing Date:** 2026-6
**Character Count:** 15131
**Document Hash:** 7a51d2532225ed27679a22670109b5f8
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001410368-26-065006.hdr.sgml**: 20260624

**ACCESSION NUMBER**: 0001410368-26-065006

**CONFORMED SUBMISSION TYPE**: NPORT-P

**PUBLIC DOCUMENT COUNT**: 1

**CONFORMED PERIOD OF REPORT**: 20260430

**FILED AS OF DATE**: 20260624

**DATE AS OF CHANGE**: 20260624

**PERIOD START**: 20261031

**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:** 261114376

**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:** 2026-10-31

- **b. Date as of which information is reported:** 2026-04-30

**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:** $5140306006.19

**Total Liabilities:** $591263.25

**Net Assets:** $5139714742.94

**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 | 1.25%                | -1.41%               | 1.17%                |

**Monthly Gains & Losses**

| Period   | Net Realized Gain/Loss   | Net Unrealized Appreciation/Depreciation   |
|:---|:---|:---|
| Month 1  | $0.00                    | $63766716.42                               |
| Month 2  | $763258.29               | $-95083926.40                              |
| Month 3  | $1656087.97              | $26258430.94                               |

### 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   |
|:---|:---|:---|:---|:---|:---|:---|---:|:---|:---|:---|:---|:---|:---|:---|---:|:---|
| United States Treasury       | U.S. Treasury Inflation-Indexed Notes                        | CUSIP: 91282CCM1<br>LEI: 254900HROIFWPRGM1V77 | Long             | DBT              | UST               | US        | 175544640 | PA      | $165326971.19 | 3.22%             | 2031-07-15      | Fixed         | 0.13%                 | No            |                  2 | On Loan: No      |
| United States Treasury       | U.S. Treasury Inflation-Indexed Notes                        | CUSIP: 9128287D6<br>LEI: 254900HROIFWPRGM1V77 | Long             | DBT              | UST               | US        | 153918265 | PA      | $150551970.96 | 2.93%             | 2029-07-15      | Fixed         | 0.25%                 | No            |                  2 | On Loan: No      |
| United States Treasury       | U.S. Treasury Inflation-Indexed Notes                        | CUSIP: 91282CJY8<br>LEI: 254900HROIFWPRGM1V77 | Long             | DBT              | UST               | US        | 162628290 | PA      | $163196365.25 | 3.18%             | 2034-01-15      | Fixed         | 1.75%                 | No            |                  2 | On Loan: No      |
| United States Treasury       | U.S. Treasury Inflation-Indexed Notes                        | CUSIP: 91282CGK1<br>LEI: 254900HROIFWPRGM1V77 | Long             | DBT              | UST               | US        |  99816080 | PA      | $96948669.46  | 1.89%             | 2033-01-15      | Fixed         | 1.13%                 | No            |                  2 | On Loan: No      |
| United States Treasury       | U.S. Treasury Inflation-Indexed Bonds                        | CUSIP: 912810FQ6<br>LEI: 254900HROIFWPRGM1V77 | Long             | DBT              | UST               | US        | 295440375 | PA      | $327711758.50 | 6.38%             | 2032-04-15      | Fixed         | 3.38%                 | No            |                  2 | On Loan: No      |
| United States Treasury       | U.S. Treasury Inflation-Indexed Bonds                        | CUSIP: 912810RL4<br>LEI: 254900HROIFWPRGM1V77 | Long             | DBT              | UST               | US        | 102675740 | PA      | $73918880.38  | 1.44%             | 2045-02-15      | Fixed         | 0.75%                 | No            |                  2 | On Loan: No      |
| United States Treasury       | U.S. Treasury Inflation-Indexed Bonds                        | CUSIP: 912810QP6<br>LEI: 254900HROIFWPRGM1V77 | Long             | DBT              | UST               | US        | 407039980 | PA      | $395905653.71 | 7.70%             | 2041-02-15      | Fixed         | 2.13%                 | No            |                  2 | On Loan: No      |
| United States Treasury       | U.S. Treasury Inflation-Indexed Bonds                        | CUSIP: 912810PZ5<br>LEI: 254900HROIFWPRGM1V77 | Long             | DBT              | UST               | US        | 475568750 | PA      | $494882110.55 | 9.63%             | 2029-01-15      | Fixed         | 2.50%                 | No            |                  2 | On Loan: No      |
| United States Treasury       | U.S. Treasury Inflation-Indexed Notes                        | CUSIP: 912828Y38<br>LEI: 254900HROIFWPRGM1V77 | Long             | DBT              | UST               | US        |  36445920 | PA      | $36461739.35  | 0.71%             | 2028-07-15      | Fixed         | 0.75%                 | No            |                  2 | On Loan: No      |
| United States Treasury       | U.S. Treasury Inflation-Indexed Bonds                        | CUSIP: 912810FD5<br>LEI: 254900HROIFWPRGM1V77 | Long             | DBT              | UST               | US        | 229283620 | PA      | $241330431.31 | 4.70%             | 2028-04-15      | Fixed         | 3.63%                 | No            |                  2 | On Loan: No      |
| United States Treasury       | U.S. Treasury Inflation-Indexed Bonds                        | CUSIP: 912810RA8<br>LEI: 254900HROIFWPRGM1V77 | Long             | DBT              | UST               | US        | 229512495 | PA      | $169692004.85 | 3.30%             | 2043-02-15      | Fixed         | 0.63%                 | No            |                  2 | On Loan: No      |
| United States Treasury       | U.S. Treasury Inflation-Indexed Bonds                        | CUSIP: 912810RR1<br>LEI: 254900HROIFWPRGM1V77 | Long             | DBT              | UST               | US        |  16547400 | PA      | $12298377.49  | 0.24%             | 2046-02-15      | Fixed         | 1.00%                 | No            |                  2 | On Loan: No      |
| United States Treasury       | U.S. Treasury Inflation-Indexed Notes                        | CUSIP: 912828Z37<br>LEI: 254900HROIFWPRGM1V77 | Long             | DBT              | UST               | US        | 248908240 | PA      | $239719468.74 | 4.66%             | 2030-01-15      | Fixed         | 0.13%                 | No            |                  2 | On Loan: No      |
| United States Treasury       | U.S. Treasury Inflation-Indexed Bonds                        | CUSIP: 912810QV3<br>LEI: 254900HROIFWPRGM1V77 | Long             | DBT              | UST               | US        | 289196000 | PA      | $223744851.84 | 4.35%             | 2042-02-15      | Fixed         | 0.75%                 | No            |                  2 | On Loan: No      |
| State Street Global Advisors | State Street Institutional U.S. Government Money Market Fund | CUSIP: 857492706<br>LEI: 549300BZ5TGIFZUZDZ37 | Long             | STIV             | RF                | US        |  26815176 | NS      | $26815176.13  | 0.52%             |  |  |  | No            |                  1 | On Loan: No      |
| United States Treasury       | U.S. Treasury Inflation-Indexed Notes                        | CUSIP: 91282CLE9<br>LEI: 254900HROIFWPRGM1V77 | Long             | DBT              | UST               | US        |  45815880 | PA      | $46370425.33  | 0.90%             | 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        |  31059600 | PA      | $31818655.63  | 0.62%             | 2035-01-15      | Fixed         | 2.13%                 | No            |                  2 | On Loan: No      |
| United States Treasury       | U.S. Treasury Inflation-Indexed Notes                        | CUSIP: 91282CBF7<br>LEI: 254900HROIFWPRGM1V77 | Long             | DBT              | UST               | US        | 213373800 | PA      | $202185713.36 | 3.93%             | 2031-01-15      | Fixed         | 0.13%                 | No            |                  2 | On Loan: No      |
| United States Treasury       | U.S. Treasury Inflation-Indexed Bonds                        | CUSIP: 912810RF7<br>LEI: 254900HROIFWPRGM1V77 | Long             | DBT              | UST               | US        | 159120190 | PA      | $132055589.64 | 2.57%             | 2044-02-15      | Fixed         | 1.38%                 | No            |                  2 | On Loan: No      |
| United States Treasury       | U.S. Treasury Inflation-Indexed Notes                        | CUSIP: 91282CHP9<br>LEI: 254900HROIFWPRGM1V77 | Long             | DBT              | UST               | US        |  30122960 | PA      | $29686221.36  | 0.58%             | 2033-07-15      | Fixed         | 1.38%                 | No            |                  2 | On Loan: No      |
| United States Treasury       | U.S. Treasury Inflation-Indexed Notes                        | CUSIP: 9128285W6<br>LEI: 254900HROIFWPRGM1V77 | Long             | DBT              | UST               | US        | 510475110 | PA      | $509100650.66 | 9.91%             | 2029-01-15      | Fixed         | 0.88%                 | No            |                  2 | On Loan: No      |
| United States Treasury       | U.S. Treasury Inflation-Indexed Bonds                        | CUSIP: 912810FH6<br>LEI: 254900HROIFWPRGM1V77 | Long             | DBT              | UST               | US        | 444695425 | PA      | $480910753.29 | 9.36%             | 2029-04-15      | Fixed         | 3.88%                 | 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: 91282CEZ0<br>LEI: 254900HROIFWPRGM1V77 | Long             | DBT              | UST               | US        |  68596940 | PA      | $65283593.24  | 1.27%             | 2032-07-15      | Fixed         | 0.63%                 | No            |                  2 | On Loan: No      |
| United States Treasury       | U.S. Treasury Inflation-Indexed Notes                        | CUSIP: 91282CDX6<br>LEI: 254900HROIFWPRGM1V77 | Long             | DBT              | UST               | US        | 279347160 | PA      | $259474640.48 | 5.05%             | 2032-01-15      | Fixed         | 0.13%                 | No            |                  2 | On Loan: No      |
| United States Treasury       | U.S. Treasury Inflation-Indexed Bonds                        | CUSIP: 912810QF8<br>LEI: 254900HROIFWPRGM1V77 | Long             | DBT              | UST               | US        | 411176960 | PA      | $404775942.12 | 7.88%             | 2040-02-15      | Fixed         | 2.13%                 | No            |                  2 | On Loan: No      |
| United States Treasury       | U.S. Treasury Inflation-Indexed Notes                        | CUSIP: 91282CNS6<br>LEI: 254900HROIFWPRGM1V77 | Long             | DBT              | UST               | US        |  33579150 | PA      | $33693993.72  | 0.66%             | 2035-07-15      | Fixed         | 1.88%                 | No            |                  2 | On Loan: No      |
| United States Treasury       | U.S. Treasury Inflation-Indexed Notes                        | CUSIP: 912828ZZ6<br>LEI: 254900HROIFWPRGM1V77 | Long             | DBT              | UST               | US        | 117241120 | PA      | $112410162.13 | 2.19%             | 2030-07-15      | Fixed         | 0.13%                 | No            |                  2 | On Loan: No      |

### Signature

**Date Signed:** 2026-05-19

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

**Signature:** Randy Olson

**Name of Signer:** Randy Olson

**Title:** Vice President