CERTIFICATIONS PURSUANT TO SECTION 906 OF THE

SARBANES-OXLEY ACT OF 2002

David P. Butler and Gerard K. O’Reilly, Co-Principal Executive Officers, and Jan Miller, Principal Financial Officer, of Dimensional Investment Group Inc., a Maryland corporation (the “Registrant”), each certify that:

1. The Registrant’s periodic report on Form N-CSR for the period ended October 31, 2023 (the “Report”) fully complies with the requirements of Section 13(a) or Section 15(d) of the Securities Exchange Act of 1934, as amended, as applicable; and

2. The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Registrant.

By:	/s/ David P. Butler
	David P. Butler
	Co-Principal Executive Officer
	Dimensional Investment Group Inc.
Date: January 5, 2024
By:	/s/ Gerard K. O’Reilly
	Gerard K. O’Reilly
	Co-Principal Executive Officer
	Dimensional Investment Group Inc.
Date: January 8, 2024
By:	/s/ Jan Miller
	Jan Miller
	Principal Financial Officer
	Dimensional Investment Group Inc.
Date: January 5, 2024