# EDGAR Filing Document

**Accession Number:** 0000831114
**File Stem:** 0001398344-26-010894
**Filing Date:** 2026-6
**Character Count:** 2872
**Document Hash:** 2f55cb55339d50a7a045420f4540516f
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001398344-26-010894.hdr.sgml**: 20260616

**ACCESSION NUMBER**: 0001398344-26-010894

**CONFORMED SUBMISSION TYPE**: 497J

**PUBLIC DOCUMENT COUNT**: 1

**FILED AS OF DATE**: 20260616

**DATE AS OF CHANGE**: 20260616

**EFFECTIVENESS DATE**: 20260616

**FILER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** RBB FUND, INC.
- **CENTRAL INDEX KEY:** 0000831114

**ORGANIZATION NAME:**
- **EIN:** 510312196
- **STATE OF INCORPORATION:** MD
- **FISCAL YEAR END:** 0831

**FILING VALUES:**
- **FORM TYPE:** 497J
- **SEC ACT:** 1933 Act
- **SEC FILE NUMBER:** 033-20827
- **FILM NUMBER:** 261093999

**BUSINESS ADDRESS:**
- **STREET 1:** 615 E. MICHIGAN ST.
- **CITY:** MILWAUKEE
- **STATE:** WI
- **ZIP:** 53202
- **BUSINESS PHONE:** 609-731-6256

**MAIL ADDRESS:**
- **STREET 1:** 615 E. MICHIGAN ST.
- **CITY:** MILWAUKEE
- **STATE:** WI
- **ZIP:** 53202

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** RBB FUND INC
- **DATE OF NAME CHANGE:** 19920703

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** FUND INC /DE/
- **DATE OF NAME CHANGE:** 19600201

## Series and Classes Contracts Data

### F/m Accumulator Ultrashort U.S. Treasury Fund (Series ID: S000105628)

| Class ID   | Class Name                                    | Ticker Symbol   |
|:---|:---|:---|
| C000276406 | F/m Accumulator Ultrashort U.S. Treasury Fund |  |

**Faegre Drinker Biddle & Reath LLP**

1500 K Street NW

Suite 1100

Washington, D.C. 20005

Telephone: (202) 842-8800

<u>www.faegredrinker.com</u>

June 16, 2026

**VIA EDGAR TRANSMISSION**

U.S. Securities and Exchange Commission

Division of Investment Management

100 F Street, N.E.

Washington, D.C. 20549

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| | |
|:---|:---|
| Re: | **The RBB Fund, Inc. (the "Company")** |
|  | **File Nos.: 033-20827 and 811-05518** |
|  | **F/m Accumulator Ultrashort U.S. Treasury Fund** (**the "Fund")** |

---

Dear Sir or Madam:

Pursuant to Rule 497(j) under the Securities Act of 1933, as amended; the Investment Company Act of 1940, as amended; and the regulations thereunder; the Company on behalf of the Fund, hereby certifies that the form of prospectus and statement of additional information that would have been filed under Rule 497(b) or (c) would not have differed from that contained in the most recent amendment for such Fund dated June 10, 2026 and filed electronically as post-effective amendment No. 400 to the Company's registration statement on Form N-1A on June 9, 2026.

If you have any questions or require further information, please do not hesitate to contact the undersigned at (202) 230-5218 or gwendolyn.williamson@faegredrinker.com.

---

| |
|:---|
| Respectfully, |
| /s/ Gwendolyn A. Williamson |
| Gwendolyn A. Williamson |

---

Enclosures

cc: Steven Plump, The RBB Fund, Inc. <br> James Shaw, The RBB Fund, Inc. <br> Jillian L. Bosmann, Faegre Drinker Biddle & Reath LLP