Exhibit 99.(b)

Certification Pursuant to Rule 30a-2(b) under the 1940 Act (17 CFR 270.30a-2(b))

Each of the undersigned hereby certifies that:

1. The Form N-CSR of Old Westbury Funds, Inc. (the “Report”) fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934, as amended; and

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

Date:	January 6, 2025	/s/ David W. Rossmiller
		David W. Rossmiller, President and Chief
		Executive Officer
		(Principal Executive Officer)

Date:	January 6, 2025	/s/ Matthew A. Rizzi
		Matthew A. Rizzi, Treasurer
		(Principal Financial Officer)