# EDGAR Filing Document

**Accession Number:** 0000909994
**File Stem:** 0000930413-25-003555
**Filing Date:** 2025-12
**Character Count:** 3622
**Document Hash:** 52fc415c8f4f2694330271457d8651ff
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0000930413-25-003555.hdr.sgml**: 20251202

**ACCESSION NUMBER**: 0000930413-25-003555

**CONFORMED SUBMISSION TYPE**: 497

**PUBLIC DOCUMENT COUNT**: 1

**FILED AS OF DATE**: 20251202

**DATE AS OF CHANGE**: 20251202

**EFFECTIVENESS DATE**: 20251202

**FILER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** OLD WESTBURY FUNDS INC
- **CENTRAL INDEX KEY:** 0000909994

**ORGANIZATION NAME:**
- **EIN:** 232874698
- **STATE OF INCORPORATION:** MD
- **FISCAL YEAR END:** 1031

**FILING VALUES:**
- **FORM TYPE:** 497
- **SEC ACT:** 1933 Act
- **SEC FILE NUMBER:** 033-66528
- **FILM NUMBER:** 251542984

**BUSINESS ADDRESS:**
- **STREET 1:** 103 BELLEVUE PARKWAY
- **CITY:** WILMINGTON
- **STATE:** DE
- **ZIP:** 19809
- **BUSINESS PHONE:** 3027914394

**MAIL ADDRESS:**
- **STREET 1:** 103 BELLEVUE PARKWAY
- **CITY:** WILMINGTON
- **STATE:** DE
- **ZIP:** 19809

## Series and Classes Contracts Data

### Old Westbury Small & Mid Cap Strategies Fund (Series ID: S000001857)

---

|  |  |  |
|:---|:---|:---|
| Class Name                                   | Ticker Symbol | Class ID   |
| Old Westbury Small & Mid Cap Strategies Fund | OWSMX         | C000004834 |

---

## Series and Classes Contracts Data

### Old Westbury Small & Mid Cap Strategies Fund (Series ID: S000001857)

| Class ID   | Class Name                                   | Ticker Symbol   |
|:---|:---|:---|
| C000004834 | Old Westbury Small & Mid Cap Strategies Fund | OWSMX           |

**OLD WESTBURY FUNDS, INC.**

(the "Corporation")

**Old Westbury Small & Mid Cap Strategies Fund**

(the "Fund")

*Supplement dated December 2, 2025 to the* 

*Prospectus dated February 15, 2025, as supplemented*

 

This Supplement updates, and should be read in conjunction with, the information provided in the Fund's Prospectus dated February 15, 2025, as supplemented.

**Important Notice Regarding a Sub-Adviser**

At a meeting held on December 2, 2025, the Board of Directors of the Corporation approved the termination of the sub-advisory agreement among Champlain Investment Partners, LLC ("Champlain"), Bessemer Investment Management LLC, and the Corporation, on behalf of the Fund.

Effective immediately, Champlain will no longer serve as a sub-adviser to the Fund. Accordingly, effective immediately, all references and information with regard to Champlain with respect to the Fund, including Champlain's portfolio managers for the Fund, are deleted.

**INVESTORS SHOULD RETAIN THIS SUPPLEMENT FOR FUTURE REFERENCE**

Old Westbury Funds, Inc.

OWF-A21-SUPP1225

**OLD WESTBURY FUNDS, INC.**

(the "Corporation")

**Old Westbury Small & Mid Cap Strategies Fund**

(the "Fund")

*Supplement dated December 2, 2025 to the* 

*Statement of Additional Information ("SAI") dated February 15, 2025, as supplemented*

 

This Supplement updates, and should be read in conjunction with, the information provided in the Fund's SAI dated February 15, 2025, as supplemented.

**Important Notice Regarding a Sub-Adviser**

At a meeting held on December 2, 2025, the Board of Directors of the Corporation approved the termination of the sub-advisory agreement among Champlain Investment Partners, LLC ("Champlain"), Bessemer Investment Management LLC, and the Corporation, on behalf of the Fund.

Effective immediately, Champlain will no longer serve as a sub-adviser to the Fund. Accordingly, effective immediately, all references and information with regard to Champlain with respect to the Fund, including Champlain's portfolio managers for the Fund, are deleted.

**INVESTORS SHOULD RETAIN THIS SUPPLEMENT FOR FUTURE REFERENCE**