EX-28.a.2

DFA INVESTMENT DIMENSIONS GROUP INC.

ARTICLES SUPPLEMENTARY TO THE CHARTER

DFA INVESTMENT DIMENSIONS GROUP INC., a Maryland corporation having its principal office in Baltimore, Maryland (hereinafter called the “Corporation”) and registered under the Investment Company Act of 1940, as amended (the “1940 Act”), as an open-end management investment company, hereby certifies, in accordance with the requirements of Section 2-208 and/or 2-208.1 of the Maryland General Corporation Law (the “MGCL”), to the State Department of Assessments and Taxation of Maryland that:

FIRST: The total number of shares of common stock which the Corporation is authorized to issue is Eighteen Billion One Hundred Forty-Five Million (18,145,000,000) shares of stock, with a par value of One Cent ($0.01) per share, having an aggregate par value of One Hundred Eighty-One Million Four Hundred Fifty Thousand Dollars ($181,450,000), all of which shall be considered common stock. The allocation of shares of common stock to each of its fifty-nine existing classes of common stock (each a “Class” and collectively the “Classes”) is as follows:

Class Designation	Number of Shares of Common Stock (per value $0.01 per share) Allocated
The U.S. Large Company Portfolio Shares	250,000,000
U.S. Micro Cap Portfolio Institutional Shares	650,000,000
The DFA One-Year Fixed Income Portfolio Shares	750,000,000
The DFA Five-Year Government Portfolio Shares	300,000,000
The United Kingdom Small Company Portfolio Institutional Shares	70,000,000
The Japanese Small Company Portfolio Institutional Shares	50,000,000
The Continental Small Company Portfolio Institutional Shares	50,000,000
The DFA Intermediate Government Fixed Income Portfolio Shares	300,000,000
The DFA Five-Year Global Fixed Income Portfolio Shares	700,000,000
Asia Pacific Small Company Portfolio Institutional Shares	50,000,000
The Large Cap International Portfolio Shares	250,000,000
U.S. Small Cap Portfolio Shares	450,000,000
U.S. Small Cap Value Portfolio Institutional Shares	650,000,000

Class Designation	Number of Shares of Common Stock (per value $0.01 per share) Allocated
The U.S. Large Cap Value Portfolio Shares	850,000,000
The DFA Real Estate Securities Portfolio Shares	300,000,000
LWAS/DFA International High Book to Market Portfolio Shares	100,000,000
The Emerging Markets Portfolio Shares	300,000,000
DFA International Small Cap Value Portfolio Institutional Shares	900,000,000
VA U.S. Large Value Portfolio Shares	50,000,000
VA Global Bond Portfolio Shares	50,000,000
VA U.S. Targeted Value Portfolio Shares	50,000,000
VA International Value Portfolio Shares	50,000,000
VA International Small Portfolio Shares	50,000,000
VA Short-Term Fixed Portfolio Shares	50,000,000
Enhanced U.S. Large Company Portfolio Shares	200,000,000
DFA Two-Year Global Fixed Income Portfolio Shares	600,000,000
International Small Company Portfolio Shares	700,000,000
Emerging Markets Small Cap Portfolio Institutional Shares	150,000,000
U.S. Targeted Value Portfolio Shares	300,000,000
Emerging Markets Value Portfolio Shares	550,000,000
Tax-Managed U.S. Targeted Value Portfolio Shares	300,000,000
Tax-Managed U.S. Small Cap Portfolio Shares	200,000,000
Tax-Managed U.S. Marketwide Value Portfolio Shares	350,000,000
Tax-Managed DFA International Value Portfolio Shares	300,000,000
Tax-Managed U.S. Equity Portfolio Shares	250,000,000
DFA Short-Term Municipal Bond Portfolio Institutional Shares	200,000,000
Emerging Markets Core Equity Portfolio Shares	450,000,000
U.S. Core Equity 1 Portfolio Shares	700,000,000
U.S. Core Equity 2 Portfolio Shares	1,125,000,000

2

Class Designation	Number of Shares of Common Stock (per value $0.01 per share) Allocated
U.S. Vector Equity Portfolio Shares	350,000,000
International Core Equity Portfolio Shares	1,025,000,000
Emerging Markets Social Core Equity Portfolio Shares	100,000,000
DFA Inflation-Protected Securities Portfolio Shares	150,000,000
DFA International Real Estate Securities Portfolio Shares	400,000,000
DFA California Short-Term Municipal Bond Portfolio Institutional Shares	100,000,000
T.A. U.S. Core Equity 2 Portfolio Institutional Shares	550,000,000
CSTG&E U.S. Social Core Equity 2 Portfolio Shares	100,000,000
CSTG&E International Social Core Equity Portfolio Shares	100,000,000
U.S. Social Core Equity 2 Portfolio Shares	100,000,000
U.S. Sustainability Core 1 Portfolio	100,000,000
International Sustainability Core 1 Portfolio	100,000,000
DFA Selectively Hedged Global Fixed Income Portfolio Institutional Shares	100,000,000
T.A. World ex U.S. Core Equity Portfolio Institutional Shares	200,000,000
DFA Global Real Estate Securities Portfolio	100,000,000
DFA International Value ex Tobacco Portfolio	100,000,000
International Vector Equity Portfolio	100,000,000
DFA Short-Term Extended Quality Portfolio Institutional Shares	100,000,000
DFA Intermediate-Term Extended Quality Portfolio Institutional Shares	100,000,000
DFA VA Global Moderate Allocation Portfolio Shares	25,000,000

In addition, 500,000,000 shares of common stock of the Corporation remain unallocated and undesignated.

The shares of common stock of the Corporation with a par value of One Cent ($0.01) per share allocated to the following Classes:

The U.S. Large Company Portfolio Shares;

The DFA One-Year Fixed Income Portfolio Shares;

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The DFA Five-Year Government Portfolio Shares;

The DFA Intermediate Government Fixed Income Portfolio Shares;

The DFA Five-Year Global Fixed Income Portfolio Shares;

The Large Cap International Portfolio Shares;

U.S. Small Cap Portfolio Shares;

The U.S. Large Cap Value Portfolio Shares;

The DFA Real Estate Securities Portfolio Shares;

The Emerging Markets Portfolio Shares;

Enhanced U.S. Large Company Portfolio Shares;

DFA Two-Year Global Fixed Income Portfolio Shares;

International Small Company Portfolio Shares;

U.S. Targeted Value Portfolio Shares;

Emerging Markets Value Portfolio Shares;

Emerging Markets Core Equity Portfolio Shares;

U.S. Core Equity 1 Portfolio Shares;

U.S. Core Equity 2 Portfolio Shares;

U.S. Vector Equity Portfolio Shares;

International Core Equity Portfolio Shares;

DFA Inflation-Protected Securities Portfolio Shares; and

DFA International Real Estate Securities Portfolio Shares;

have been further classified into the following Sub-Classes:

Class Designation	Number of Shares of Common Stock (per value $0.01 per share) Allocated
The U.S. Large Company Portfolio Shares – Institutional Class	200,000,000
The U.S. Large Company Portfolio Shares – Class R1	25,000,000
The U.S. Large Company Portfolio Shares – Class R2	25,000,000
The DFA One-Year Fixed Income Portfolio Shares – Institutional Class	650,000,000
The DFA One-Year Fixed Income Portfolio Shares – Class R1	50,000,000
The DFA One-Year Fixed Income Portfolio Shares – Class R2	50,000,000
The DFA Five-Year Government Portfolio Shares – Institutional Class	250,000,000
The DFA Five-Year Government Portfolio Shares – Class R1	25,000,000
The DFA Five-Year Government Portfolio Shares – Class R2	25,000,000

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Class Designation	Number of Shares of Common Stock (per value $0.01 per share) Allocated
The DFA Intermediate Government Fixed Income Portfolio Shares – Institutional Class	250,000,000
The DFA Intermediate Government Fixed Income Portfolio Shares – Class R1	25,000,000
The DFA Intermediate Government Fixed Income Portfolio Shares – Class R2	25,000,000
The DFA Five-Year Global Fixed Income Portfolio Shares – Institutional Class	600,000,000
The DFA Five-Year Global Fixed Income Portfolio Shares – Class R1	50,000,000
The DFA Five-Year Global Fixed Income Portfolio Shares – Class R2	50,000,000
The Large Cap International Portfolio Shares – Institutional Class	200,000,000
The Large Cap International Portfolio Shares – Class R1	25,000,000
The Large Cap International Portfolio Shares – Class R2	25,000,000
U.S. Small Cap Portfolio Shares – Institutional Class	400,000,000
U.S. Small Cap Portfolio Shares – Class R1	25,000,000
U.S. Small Cap Portfolio Shares – Class R2	25,000,000
The U.S. Large Cap Value Portfolio Shares – Institutional Class	750,000,000
The U.S. Large Cap Value Portfolio Shares – Class R1	50,000,000
The U.S. Large Cap Value Portfolio Shares – Class R2	50,000,000
The DFA Real Estate Securities Portfolio Shares – Institutional Class	250,000,000
The DFA Real Estate Securities Portfolio Shares – Class R1	25,000,000
The DFA Real Estate Securities Portfolio Shares – Class R2	25,000,000
The Emerging Markets Portfolio Shares – Institutional Class	250,000,000
The Emerging Markets Portfolio Shares – Class R1	25,000,000
The Emerging Markets Portfolio Shares – Class R2	25,000,000

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Class Designation	Number of Shares of Common Stock (per value $0.01 per share) Allocated
Enhanced U.S. Large Company Portfolio Shares – Institutional Class	150,000,000
Enhanced U.S. Large Company Portfolio Shares – Class R1	25,000,000
Enhanced U.S. Large Company Portfolio Shares – Class R2	25,000,000
DFA Two-Year Global Fixed Income Portfolio Shares – Institutional Class	550,000,000
DFA Two-Year Global Fixed Income Portfolio Shares – Class R1	25,000,000
DFA Two-Year Global Fixed Income Portfolio Shares – Class R2	25,000,000
International Small Company Portfolio Shares – Institutional Class	600,000,000
International Small Company Portfolio Shares – Class R1	50,000,000
International Small Company Portfolio Shares – Class R2	50,000,000
U.S. Targeted Value Portfolio Shares – Institutional Class	250,000,000
U.S. Targeted Value Portfolio Shares – Class R1	25,000,000
U.S. Targeted Value Portfolio Shares – Class R2	25,000,000
Emerging Markets Value Portfolio Shares – Institutional Class	500,000,000
Emerging Markets Value Portfolio Shares – Class R1	25,000,000
Emerging Markets Value Portfolio Shares – Class R2	25,000,000
Emerging Markets Core Equity Portfolio Shares – Institutional Class	400,000,000
Emerging Markets Core Equity Portfolio Shares – Class R1	25,000,000
Emerging Markets Core Equity Portfolio Shares – Class R2	25,000,000
U.S. Core Equity 1 Portfolio Shares – Institutional Class	600,000,000
U.S. Core Equity 1 Portfolio Shares – Class R1	50,000,000
U.S. Core Equity 1 Portfolio Shares – Class R2	50,000,000
U.S. Core Equity 2 Portfolio Shares – Institutional Class	1,025,000,000
U.S. Core Equity 2 Portfolio Shares – Class R1	50,000,000
U.S. Core Equity 2 Portfolio Shares – Class R2	50,000,000
U.S. Vector Equity Portfolio Shares – Institutional Class	300,000,000

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Class Designation	Number of Shares of Common Stock (per value $0.01 per share) Allocated
U.S. Vector Equity Portfolio Shares – Class R1	25,000,000
U.S. Vector Equity Portfolio Shares – Class R2	25,000,000
International Core Equity Portfolio Shares – Institutional Class	925,000,000
International Core Equity Portfolio Shares – Class R1	50,000,000
International Core Equity Portfolio Shares – Class R2	50,000,000
DFA Inflation-Protected Securities Portfolio Shares – Institutional Class	100,000,000
DFA Inflation-Protected Securities Portfolio Shares – Class R1	25,000,000
DFA Inflation-Protected Securities Portfolio Shares – Class R2	25,000,000
DFA International Real Estate Securities Portfolio Shares – Institutional Class	350,000,000
DFA International Real Estate Securities Portfolio Shares – Class R1	25,000,000
DFA International Real Estate Securities Portfolio Shares – Class R2	25,000,000

SECOND: The Board of Directors of the Corporation has adopted a resolution increasing the total number of shares that the Corporation has the authority to issue from Eighteen Billion One Hundred Forty-Five Million (18,145,000,000) shares of stock, with a par value of $0.01 per share, having an aggregate par value of One Hundred Eighty One Million Four Hundred Fifty Thousand Dollars ($181,450,000), to Sixty Billion (60,000,000,000) shares of stock, with a par value of One Cent ($0.01) per share, having an aggregate par value of Six Hundred Million Dollars ($600,000,000), all of which shall be considered common stock, and further classifying and allocating Twenty-Eight Billion Seven Hundred Fifty-Five Million (28,755,000,000) shares of the unallocated and unissued common stock (par value $0.01 per share), as follows:

U.S. Large Company Portfolio – Institutional Sub-Class	300,000,000
U.S. Large Company Portfolio – Class R1 Sub-Class	75,000,000
U.S. Large Company Portfolio – Class R2 Sub-Class	75,000,000
U.S. Micro Cap Portfolio – Institutional Class	850,000,000
DFA One-Year Fixed Income Portfolio – Institutional Sub-Class	1,350,000,000

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DFA One-Year Fixed Income Portfolio – Class R1 Sub-Class	50,000,000
DFA One-Year Fixed Income Portfolio – Class R2 Sub-Class	50,000,000
DFA Five-Year Government Portfolio – Institutional Sub-Class	250,000,000
DFA Five-Year Government Portfolio – Class R1 Sub-Class	75,000,000
DFA Five-Year Government Portfolio – Class R2 Sub-Class	75,000,000
United Kingdom Small Company Portfolio – Institutional Class	30,000,000
Japanese Small Company Portfolio – Institutional Class	50,000,000
Continental Small Company Portfolio – Institutional Class	50,000,000
DFA Intermediate Government Fixed Income Portfolio – Institutional Sub-Class	450,000,000
DFA Intermediate Government Fixed Income Portfolio – Class R1 Sub-Class	75,000,000
DFA Intermediate Government Fixed Income Portfolio – Class R2 Sub-Class	75,000,000
DFA Five-Year Global Fixed Income Portfolio – Institutional Sub-Class	900,000,000
DFA Five-Year Global Fixed Income Portfolio – Class R1 Sub-Class	50,000,000
DFA Five-Year Global Fixed Income Portfolio – Class R2 Sub-Class	50,000,000
Asia Pacific Small Company Portfolio – Institutional Class	50,000,000
Large Cap International Portfolio – Institutional Sub-Class	300,000,000
Large Cap International Portfolio – Class R1 Sub-Class	75,000,000
Large Cap International Portfolio – Class R2 Sub-Class	75,000,000
U.S. Small Cap Portfolio – Institutional Sub-Class	600,000,000
U.S. Small Cap Portfolio – Class R1 Sub-Class	75,000,000
U.S. Small Cap Portfolio – Class R2 Sub-Class	75,000,000
U.S. Small Cap Value Portfolio – Institutional Sub-Class	1,050,000,000
U.S. Large Cap Value Portfolio – Institutional Sub-Class	1,250,000,000
U.S. Large Cap Value Portfolio – Class R1 Sub-Class	50,000,000

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U.S. Large Cap Value Portfolio – Class R2 Sub-Class	50,000,000
DFA Real Estate Securities Portfolio – Institutional Sub-Class	450,000,000
DFA Real Estate Securities Portfolio – Class R1 Sub-	75,000,000
DFA Real Estate Securities Portfolio – Class R2 Sub-Class	75,000,000
LWAS/DFA International High Book to Market Portfolio	100,000,000
Emerging Markets Portfolio – Institutional Sub-Class	250,000,000
Emerging Markets Portfolio – Class R1 Sub-Class	75,000,000
Emerging Markets Portfolio – Class R2 Sub-Class	75,000,000
DFA International Small Cap Value Portfolio – Institutional Class	1,400,000,000
VA U.S. Large Value Portfolio	50,000,000
VA Global Bond Portfolio	50,000,000
VA U.S. Targeted Value Portfolio	50,000,000
VA International Value Portfolio	50,000,000
VA International Small Portfolio	50,000,000
VA Short-Term Fixed Portfolio	50,000,000
Enhanced U.S. Large Company Portfolio – Institutional Sub-Class	150,000,000
Enhanced U.S. Large Company Portfolio – Class R1 Sub-Class	75,000,000
Enhanced U.S. Large Company Portfolio – Class R2 Sub-Class	75,000,000
DFA Two-Year Global Fixed Income Portfolio – Institutional Sub-Class	1,450,000,000
DFA Two-Year Global Fixed Income Portfolio – Class R1 Sub-Class	75,000,000
DFA Two-Year Global Fixed Income Portfolio – Class R2 Sub-Class	75,000,000
International Small Company Portfolio – Institutional Sub-Class	900,000,000
International Small Company Portfolio – Class R1 Sub-Class	50,000,000
International Small Company Portfolio – Class R2 Sub-Class	50,000,000
Emerging Markets Small Cap Portfolio – Institutional Class	350,000,000

9

U.S. Targeted Value Portfolio – Institutional Class	450,000,000
U.S. Targeted Value Portfolio – Class R1 Sub-Class	75,000,000
U.S. Targeted Value Portfolio – Class R2 Sub-Class	75,000,000
Emerging Markets Value Portfolio – Institutional Sub-Class	1,000,000,000
Emerging Markets Value Portfolio – Class R1 Sub-Class	75,000,000
Emerging Markets Value Portfolio – Class R2 Sub-Class	75,000,000
Tax-Managed U.S. Targeted Value Portfolio	400,000,000
Tax-Managed U.S. Small Cap Portfolio	300,000,000
Tax-Managed U.S. Marketwide Value Portfolio	350,000,000
Tax-Managed DFA International Value Portfolio	400,000,000
Tax-Managed U.S. Equity Portfolio	250,000,000
DFA Short-Term Municipal Bond Portfolio – Institutional Class	300,000,000
Emerging Markets Core Equity Portfolio – Institutional Sub-Class	600,000,000
Emerging Markets Core Equity Portfolio – Class R1 Sub-Class	75,000,000
Emerging Markets Core Equity Portfolio – Class R2 Sub-Class	75,000,000
U.S. Core Equity 1 Portfolio – Institutional Sub-Class	900,000,000
U.S. Core Equity 1 Portfolio – Class R1 Sub-Class	50,000,000
U.S. Core Equity 1 Portfolio – Class R2 Sub-Class	50,000,000
U.S. Core Equity 2 Portfolio – Institutional Sub-Class	1,275,000,000
U.S. Core Equity 2 Portfolio – Class R1 Sub-Class	50,000,000
U.S. Core Equity 2 Portfolio – Class R2 Sub-Class	50,000,000
U.S. Vector Equity 1 Portfolio – Institutional Sub-Class	700,000,000
U.S. Vector Equity 1 Portfolio – Class R1 Sub-Class	75,000,000
U.S. Vector Equity 1 Portfolio – Class R2 Sub-Class	75,000,000
International Core Equity Portfolio – Institutional Sub-Class	1,075,000,000

10

International Core Equity Portfolio – Class R1 Sub-Class	50,000,000
International Core Equity Portfolio – Class R2 Sub-Class	50,000,000
Emerging Markets Social Core Equity Portfolio	400,000,000
DFA Inflation-Protected Securities Portfolio – Institutional Sub-Class	400,000,000
DFA Inflation-Protected Securities Portfolio – Class R1 Sub-Class	75,000,000
DFA Inflation-Protected Securities Portfolio – Class R2 Sub-Class	75,000,000
DFA International Real Estate Securities Portfolio – Institutional Sub-Class	350,000,000
DFA International Real Estate Securities Portfolio – Class R1 Sub-Class	75,000,000
DFA International Real Estate Securities Portfolio – Class R2 Sub-Class	75,000,000
DFA California Short-Term Municipal Bond Portfolio – Institutional Class	200,000,000
T.A. U.S. Core Equity 2 Portfolio – Institutional Class	450,000,000
CSTG&E U.S. Social Core Equity 2 Portfolio	200,000,000
CSTG&E International Social Core Equity 2 Portfolio	200,000,000
U.S. Social Core Equity 2 Portfolio	200,000,000
U.S. Sustainability Core 1 Portfolio	200,000,000
International Sustainability Core 1 Portfolio	200,000,000
DFA Selectively Hedged Global Fixed Income Portfolio – Institutional Class	200,000,000
T.A. World ex U.S. Core Equity Portfolio – Institutional Class	300,000,000
DFA Global Real Estate Securities Portfolio	400,000,000
DFA International Value ex Tobacco Portfolio	200,000,000
International Vector Equity Portfolio	400,000,000
DFA Short-Term Extended Quality Portfolio – Institutional Class	400,000,000
DFA Intermediate-Term Extended Quality Portfolio – Institutional Class	200,000,000
VA Global Moderate Allocation Portfolio	75,000,000

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THIRD: Following the aforesaid classifications, allocations and designations, the total number of shares of common stock which the Corporation is authorized to issue is Sixty Billion (60,000,000,000), having an aggregate par value of Six Hundred Million Dollars ($600,000,000). The allocation of shares of common stock to each of the fifty-nine Classes is as follows:

Class Designation	Number of Shares of Common Stock (per value $0.01 per share) Allocated
The U.S. Large Company Portfolio Shares	700,000,000
U.S. Micro Cap Portfolio Institutional Shares	1,500,000,000
The DFA One-Year Fixed Income Portfolio Shares	2,200,000,000
The DFA Five-Year Government Portfolio Shares	700,000,000
The United Kingdom Small Company Portfolio Institutional Shares	100,000,000
The Japanese Small Company Portfolio Institutional Shares	100,000,000
The Continental Small Company Portfolio Institutional Shares	100,000,000
The DFA Intermediate Government Fixed Income Portfolio Shares	900,000,000
The DFA Five-Year Global Fixed Income Portfolio Shares	1,700,000,000
Asia Pacific Small Company Portfolio Institutional Shares	100,000,000
The Large Cap International Portfolio Shares	700,000,000
U.S. Small Cap Portfolio Shares	1,200,000,000
U.S. Small Cap Value Portfolio Institutional Shares	1,700,000,000
The U.S. Large Cap Value Portfolio Shares	2,200,000,000
The DFA Real Estate Securities Portfolio Shares	900,000,000
LWAS/DFA International High Book to Market Portfolio Shares	200,000,000
The Emerging Markets Portfolio Shares	700,000,000
DFA International Small Cap Value Portfolio Institutional Shares	2,300,000,000
VA U.S. Large Value Portfolio Shares	100,000,000
VA Global Bond Portfolio Shares	100,000,000
VA U.S. Targeted Value Portfolio Shares	100,000,000
VA International Value Portfolio Shares	100,000,000
VA International Small Portfolio Shares	100,000,000
VA Short-Term Fixed Portfolio Shares	100,000,000

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Class Designation	Number of Shares of Common Stock (per value $0.01 per share) Allocated
Enhanced U.S. Large Company Portfolio Shares	500,000,000
DFA Two-Year Global Fixed Income Portfolio Shares	2,200,000,000
International Small Company Portfolio Shares	1,700,000,000
Emerging Markets Small Cap Portfolio Institutional Shares	500,000,000
U.S. Targeted Value Portfolio Shares	900,000,000
Emerging Markets Value Portfolio Shares	1,700,000,000
Tax-Managed U.S. Targeted Value Portfolio Shares	700,000,000
Tax-Managed U.S. Small Cap Portfolio Shares	500,000,000
Tax-Managed U.S. Marketwide Value Portfolio Shares	700,000,000
Tax-Managed DFA International Value Portfolio Shares	700,000,000
Tax-Managed U.S. Equity Portfolio Shares	500,000,000
DFA Short-Term Municipal Bond Portfolio Institutional Shares	500,000,000
Emerging Markets Core Equity Portfolio Shares	1,200,000,000
U.S. Core Equity 1 Portfolio Shares	1,700,000,000
U.S. Core Equity 2 Portfolio Shares	2,500,000,000
U.S. Vector Equity Portfolio Shares	1,200,000,000
International Core Equity Portfolio Shares	2,200,000,000
Emerging Markets Social Core Equity Portfolio Shares	500,000,000
DFA Inflation-Protected Securities Portfolio Shares	700,000,000
DFA International Real Estate Securities Portfolio Shares	900,000,000
DFA California Short-Term Municipal Bond Portfolio Institutional Shares	300,000,000
T.A. U.S. Core Equity 2 Portfolio Institutional Shares	1,000,000,000
CSTG&E U.S. Social Core Equity 2 Portfolio Shares	300,000,000
CSTG&E International Social Core Equity Portfolio Shares	300,000,000
U.S. Social Core Equity 2 Portfolio Shares	300,000,000

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Class Designation	Number of Shares of Common Stock (per value $0.01 per share) Allocated
U.S. Sustainability Core 1 Portfolio	300,000,000
International Sustainability Core 1 Portfolio	300,000,000
DFA Selectively Hedged Global Fixed Income Portfolio Institutional Shares	300,000,000
T.A. World ex U.S. Core Equity Portfolio Institutional Shares	500,000,000
DFA Global Real Estate Securities Portfolio	500,000,000
DFA International Value ex Tobacco Portfolio	300,000,000
International Vector Equity Portfolio	500,000,000
DFA Short-Term Extended Quality Portfolio Institutional Shares	500,000,000
DFA Intermediate-Term Extended Quality Portfolio Institutional Shares	300,000,000
DFA VA Global Moderate Allocation Portfolio Shares	100,000,000

In addition, 13,600,000,000 shares of common stock of the Corporation remain unallocated and undesignated.

The shares of common stock of the Corporation with a par value of One Cent ($0.01) per share allocated to the following Classes:

The U.S. Large Company Portfolio Shares;

The DFA One-Year Fixed Income Portfolio Shares;

The DFA Five-Year Government Portfolio Shares;

The DFA Intermediate Government Fixed Income Portfolio Shares;

The DFA Five-Year Global Fixed Income Portfolio Shares;

The Large Cap International Portfolio Shares;

U.S. Small Cap Portfolio Shares;

The U.S. Large Cap Value Portfolio Shares;

The DFA Real Estate Securities Portfolio Shares;

The Emerging Markets Portfolio Shares;

Enhanced U.S. Large Company Portfolio Shares;

DFA Two-Year Global Fixed Income Portfolio Shares;

International Small Company Portfolio Shares;

U.S. Targeted Value Portfolio Shares;

Emerging Markets Value Portfolio Shares;

Emerging Markets Core Equity Portfolio Shares;

U.S. Core Equity 1 Portfolio Shares;

U.S. Core Equity 2 Portfolio Shares;

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U.S. Vector Equity Portfolio Shares;

International Core Equity Portfolio Shares;

DFA Inflation-Protected Securities Portfolio Shares; and

DFA International Real Estate Securities Portfolio Shares;

have been further classified into the following Sub-Classes:

Class Designation	Number of Shares of Common Stock (per value $0.01 per share) Allocated
The U.S. Large Company Portfolio Shares – Institutional Class	500,000,000
The U.S. Large Company Portfolio Shares – Class R1	100,000,000
The U.S. Large Company Portfolio Shares – Class R2	100,000,000
The DFA One-Year Fixed Income Portfolio Shares – Institutional Class	2,000,000,000
The DFA One-Year Fixed Income Portfolio Shares – Class R1	100,000,000
The DFA One-Year Fixed Income Portfolio Shares – Class R2	100,000,000
The DFA Five-Year Government Portfolio Shares – Institutional Class	500,000,000
The DFA Five-Year Government Portfolio Shares – Class R1	100,000,000
The DFA Five-Year Government Portfolio Shares – Class R2	100,000,000
The DFA Intermediate Government Fixed Income Portfolio Shares – Institutional Class	700,000,000
The DFA Intermediate Government Fixed Income Portfolio Shares – Class R1	100,000,000
The DFA Intermediate Government Fixed Income Portfolio Shares – Class R2	100,000,000
The DFA Five-Year Global Fixed Income Portfolio Shares – Institutional Class	1,500,000,000
The DFA Five-Year Global Fixed Income Portfolio Shares – Class R1	100,000,000
The DFA Five-Year Global Fixed Income Portfolio Shares – Class R2	100,000,000

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Class Designation	Number of Shares of Common Stock (per value $0.01 per share) Allocated
The Large Cap International Portfolio Shares – Institutional Class	500,000,000
The Large Cap International Portfolio Shares – Class R1	100,000,000
The Large Cap International Portfolio Shares – Class R2	100,000,000
U.S. Small Cap Portfolio Shares – Institutional Class	1,000,000,000
U.S. Small Cap Portfolio Shares – Class R1	100,000,000
U.S. Small Cap Portfolio Shares – Class R2	100,000,000
The U.S. Large Cap Value Portfolio Shares – Institutional Class	2,000,000,000
The U.S. Large Cap Value Portfolio Shares – Class R1	100,000,000
The U.S. Large Cap Value Portfolio Shares – Class R2	100,000,000
The DFA Real Estate Securities Portfolio Shares – Institutional Class	700,000,000
The DFA Real Estate Securities Portfolio Shares – Class R1	100,000,000
The DFA Real Estate Securities Portfolio Shares – Class R2	100,000,000
The Emerging Markets Portfolio Shares – Institutional Class	500,000,000
The Emerging Markets Portfolio Shares – Class R1	100,000,000
The Emerging Markets Portfolio Shares – Class R2	100,000,000
Enhanced U.S. Large Company Portfolio Shares – Institutional Class	300,000,000
Enhanced U.S. Large Company Portfolio Shares – Class R1	100,000,000
Enhanced U.S. Large Company Portfolio Shares – Class R2	100,000,000
DFA Two-Year Global Fixed Income Portfolio Shares – Institutional Class	2,000,000,000
DFA Two-Year Global Fixed Income Portfolio Shares – Class R1	100,000,000
DFA Two-Year Global Fixed Income Portfolio Shares – Class R2	100,000,000
International Small Company Portfolio Shares – Institutional Class	1,500,000,000
International Small Company Portfolio Shares – Class R1	100,000,000
International Small Company Portfolio Shares – Class R2	100,000,000
U.S. Targeted Value Portfolio Shares – Institutional Class	700,000,000

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Class Designation	Number of Shares of Common Stock (per value $0.01 per share) Allocated
U.S. Targeted Value Portfolio Shares – Class R1	100,000,000
U.S. Targeted Value Portfolio Shares – Class R2	100,000,000
Emerging Markets Value Portfolio Shares – Institutional Class	1,500,000,000
Emerging Markets Value Portfolio Shares – Class R1	100,000,000
Emerging Markets Value Portfolio Shares – Class R2	100,000,000
Emerging Markets Core Equity Portfolio Shares – Institutional Class	1,000,000,000
Emerging Markets Core Equity Portfolio Shares – Class R1	100,000,000
Emerging Markets Core Equity Portfolio Shares – Class R2	100,000,000
U.S. Core Equity 1 Portfolio Shares – Institutional Class	1,500,000,000
U.S. Core Equity 1 Portfolio Shares – Class R1	100,000,000
U.S. Core Equity 1 Portfolio Shares – Class R2	100,000,000
U.S. Core Equity 2 Portfolio Shares – Institutional Class	2,300,000,000
U.S. Core Equity 2 Portfolio Shares – Class R1	100,000,000
U.S. Core Equity 2 Portfolio Shares – Class R2	100,000,000
U.S. Vector Equity Portfolio Shares – Institutional Class	1,000,000,000
U.S. Vector Equity Portfolio Shares – Class R1	100,000,000
U.S. Vector Equity Portfolio Shares – Class R2	100,000,000
International Core Equity Portfolio Shares – Institutional Class	2,000,000,000
International Core Equity Portfolio Shares – Class R1	100,000,000
International Core Equity Portfolio Shares – Class R2	100,000,000
DFA Inflation-Protected Securities Portfolio Shares – Institutional Class	500,000,000
DFA Inflation-Protected Securities Portfolio Shares – Class R1	100,000,000
DFA Inflation-Protected Securities Portfolio Shares – Class R2	100,000,000
DFA International Real Estate Securities Portfolio Shares – Institutional Class	700,000,000

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Class Designation	Number of Shares of Common Stock (per value $0.01 per share) Allocated
DFA International Real Estate Securities Portfolio Shares – Class R1	100,000,000
DFA International Real Estate Securities Portfolio Shares – Class R2	100,000,000

FOURTH: A description of the shares of the following Classes:

The U.S. Large Company Portfolio Shares;

The DFA One-Year Fixed Income Portfolio Shares;

The DFA Five-Year Government Portfolio Shares;

The DFA Intermediate Government Fixed Income Portfolio Shares;

The DFA Five-Year Global Fixed Income Portfolio Shares;

The Large Cap International Portfolio Shares;

U.S. Small Cap Portfolio Shares;

The U.S. Large Cap Value Portfolio Shares;

The DFA Real Estate Securities Portfolio Shares;

The Emerging Markets Portfolio Shares;

Enhanced U.S. Large Company Portfolio Shares;

DFA Two-Year Global Fixed Income Portfolio Shares;

International Small Company Portfolio Shares;

U.S. Targeted Value Portfolio Shares;

Emerging Markets Value Portfolio Shares;

Emerging Markets Core Equity Portfolio Shares;

U.S. Core Equity 1 Portfolio Shares;

U.S. Core Equity 2 Portfolio Shares;

U.S. Vector Equity Portfolio Shares;

International Core Equity Portfolio Shares;

DFA Inflation-Protected Securities Portfolio Shares; and

DFA International Real Estate Securities Portfolio Shares;

and the Sub-Classes thereof, as well as any other Class hereafter divided into Sub-Classes, unless otherwise provided in the Articles Supplementary creating Sub-Classes with respect to one or more Classes of Shares, with the preferences, conversion and other rights, voting powers, restrictions, limitations as to dividends, qualifications and terms and conditions of redemption as set or changed by the Board of Directors of the Corporation, is as follows:

The holder of each share of each Class and Sub-Class shall be entitled to one vote for each full share, and a fractional vote for each fractional share of stock then standing in his or her name on the books of the Corporation. All shares of the Classes and Sub-Classes then issued and outstanding and entitled to vote, irrespective of Class or Sub-Class, shall be voted in the aggregate and not by Class or Sub-Class, except: (1) when otherwise expressly provided by the Maryland General Corporation Law; (2) when required by the 1940 Act, shares shall be voted by

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Class or Sub-Class; and (3) when a matter to be voted upon does not affect any interest of a particular Class or Sub-Class, then only shareholders of the affected Class(es) or Sub-Class(es) shall be entitled to vote thereon.

Each share of each Class and Sub-Class shall have the following preferences and special rights, restrictions, and limitations:

(1) All consideration received by the Corporation for the issue or sale of stock of a Class (or a Sub-Class), together with all income, earnings, profits, and proceeds thereof, and any funds or payments derived from any reinvestment of such proceeds in whatever form the same may be, shall irrevocably belong to the Class (or Sub-Class) of stock with respect to which such assets, payments or funds were received by the Corporation for all purposes, subject only to the rights of creditors.

(2) Dividends or distributions on shares of a Class (or a Sub-Class) and redemptions of any Class (or Sub-Class) shall be paid only out of earnings, surplus, or other lawfully available assets belonging to such Class (or Sub-Class).

(3) The Corporation may deduct from the proceeds of redemption of shares of each Class (or Sub-Class) (other than shares of The DFA One-Year Fixed Income Portfolio Shares) the cost incurred in liquidating investment securities to pay redemptions in cash as set forth in the By-Laws.

(4) In the event of the liquidation or dissolution of the Corporation, holders of each Class (or Sub-Class) shall be entitled to receive, as a Class (or a Sub-Class), out of the assets of the Corporation available for distribution to shareholders, but other than general assets not belonging to any particular Class (or Sub-Class), the assets belonging to such Class (or Sub-Class); and the assets so distributable to the shareholders of any Class (or Sub-Class) shall be distributed among such shareholders in proportion to the asset value of the respective Classes (or Sub-Classes). In addition such holders shall be entitled to receive their proportionate share of assets of the Corporation which do not belong solely to any particular Class (or Sub-Class), as determined by the Board of Directors.

(5) The assets belonging to each Class (or Sub-Class) shall be charged with the liabilities in respect to such Class (or Sub-Class), and shall also be charged with their share of the general liabilities of the Corporation as determined by the Board of Directors, and such determination shall be conclusive for all purposes.

FIFTH: The shares aforesaid have been duly classified by the Board of Directors pursuant to authority contained in the Charter of the Corporation and, to the extent applicable, in accordance with Sections 2-105(c), 2-208 and/or 2-208.1 of the MGCL.

SIXTH: These Articles Supplementary shall become effective upon filing.

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[signatures begin on next page]

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IN WITNESS WHEREOF, DFA Investment Dimensions Group Inc. has caused these Articles Supplementary to be signed and acknowledged in its name and on its behalf by its Vice President and attested to by its Assistant Secretary on this 22nd day of September, 2009; and its Vice President acknowledges that these Articles Supplementary are the act of DFA Investment Dimensions Group Inc., and he further acknowledges that, as to all matters or facts set forth herein which are required to be verified under oath, such matters and facts are true in all material respects to the best of his knowledge, information and belief, and that this statement is made under the penalties for perjury.

ATTEST:		DFA INVESTMENT DIMENSIONS GROUP INC.
By:	/s/ Valerie A. Brown	By:	/s/ Jeff J. Jeon
	Valerie A. Brown, Assistant Secretary		Jeff J. Jeon, Vice President

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