DFA INVESTMENT DIMENSIONS GROUP INC.
U.S. Large Cap Equity Portfolio U.S. Large Cap Value Portfolio U.S. Core Equity 1 Portfolio U.S. Core Equity 2 Portfolio U.S. Vector Equity Portfolio U.S. High Relative Profitability Portfolio DFA Real Estate Securities Portfolio	U.S. Large Cap Growth Portfolio U.S. Social Core Equity 2 Portfolio U.S. Sustainability Core 1 Portfolio Tax-Managed U.S. Marketwide Value Portfolio T.A. U.S. Core Equity 2 Portfolio Tax-Managed U.S. Equity Portfolio VA U.S. Large Value Portfolio
DIMENSIONAL INVESTMENT GROUP INC.
U.S. Large Company Portfolio U.S. Large Cap Value Portfolio III Tax-Managed U.S. Marketwide Value Portfolio II DIMENSIONAL ETF TRUST Dimensional US Core Equity Market ETF Dimensional U.S. Equity ETF Dimensional U.S. Core Equity 2 ETF

SUPPLEMENT TO THE SUMMARY AND STATUTORY PROSPECTUSES AND STATEMENTS OF ADDITIONAL INFORMATION OF EACH OF THE PORTFOLIOS LISTED ABOVE

The purpose of this Supplement to the Summary and Statutory Prospectuses and Statements of Additional Information dated February 28, 2021, of the portfolios listed above (collectively, the “Portfolios”), each a series of DFA Investment Dimensions Group Inc., Dimensional Investment Group Inc., or Dimensional ETF Trust, is to notify shareholders that Lukas J. Smart no longer serves as a portfolio manager to each Portfolio. Accordingly, all references to Lukas J. Smart are hereby removed from the respective Summary and Statutory Prospectuses and Statements of Additional Information, as applicable.

The date of this Supplement is March 1, 2021