# EDGAR Filing Document

**Accession Number:** 0001618627
**File Stem:** 0001398344-26-010117
**Filing Date:** 2026-6
**Character Count:** 5347
**Document Hash:** 7b2470d2c42dccba3c234a3c60b6d4ba
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001398344-26-010117.hdr.sgml**: 20260601

**ACCESSION NUMBER**: 0001398344-26-010117

**CONFORMED SUBMISSION TYPE**: 497

**PUBLIC DOCUMENT COUNT**: 16

**FILED AS OF DATE**: 20260601

**DATE AS OF CHANGE**: 20260601

**EFFECTIVENESS DATE**: 20260601

**FILER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** RBB Fund Trust
- **CENTRAL INDEX KEY:** 0001618627

**ORGANIZATION NAME:**
- **EIN:** 000000000
- **STATE OF INCORPORATION:** DE
- **FISCAL YEAR END:** 0831

**FILING VALUES:**
- **FORM TYPE:** 497
- **SEC ACT:** 1933 Act
- **SEC FILE NUMBER:** 333-200168
- **FILM NUMBER:** 261051933

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

**MAIL ADDRESS:**
- **STREET 1:** 615 EAST MICHIGAN STREET
- **CITY:** MILWAUKEE
- **STATE:** WI
- **ZIP:** 53202

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** PENN Capital Funds Trust
- **DATE OF NAME CHANGE:** 20140904

## Series and Classes Contracts Data

### MUFG Japan Small Cap Active ETF (Series ID: S000093543)

---

|  |  |  |
|:---|:---|:---|
| Class Name                      | Ticker Symbol | Class ID   |
| MUFG Japan Small Cap Active ETF | MJSC          | C000261884 |

---

## Series and Classes Contracts Data

### MUFG Japan Small Cap Active ETF (Series ID: S000093543)

| Class ID   | Class Name                      | Ticker Symbol   |
|:---|:---|:---|
| C000261884 | MUFG Japan Small Cap Active ETF | MJSC            |

?xml version='1.0' encoding='ASCII'?

**THE RBB FUND TRUST**

**MUFG Japan Small Cap Active ETF (NYSE Arca - MJSC)**

**Supplement dated June 1, 2026 to the Prospectus dated December 31, 2025**

1. The "Fees and Expenses" table and "Example" in the section entitled "SUMMARY
SECTION" of the Prospectus are hereby deleted and replaced with the following:

**Fees and Expenses**

This table describes the fees and expenses that you may pay if you buy, hold, and sell shares of the Fund ("Shares"). **This table and the Example below do not include the brokerage commissions that investors may pay on their purchases and sales of Shares.**

---

| | |
|:---|:---|
| **ANNUAL FUND OPERATING EXPENSES** (expenses that you pay each year as a percentage of the value of your investment): |  |
| Management Fees | 0.75% |
| Distribution (12b-1) Fees | 0.00% |
| Other Expenses<sup>(1)</sup> | 0.93% |
| Total Annual Fund Operating Expenses | 1.68% |
| Fee Waivers and/or Expense Reimbursement | (0.67)% |
| Total Annual Fund Operating Expenses After Fee Waivers and/or Expense Reimbursement<sup>(2)</sup> | 1.01% |

---

<sup>(1)</sup> "Other Expenses" are estimated for the current fiscal year. "Other Expenses" include acquired fund fees and expenses ("AFFE") of 0.01%, which are indirect fees and expenses that the Fund incurs from holding the shares of other mutual funds, including money market funds and exchange traded funds. AFFE is estimated for the current fiscal year.

<sup>(2)</sup> Effective June 1, 2026, The RBB Fund Trust (the "Trust") and Clearbrook Investment Consulting, LLC (the "Adviser") entered into an expense limitation agreement under which the Adviser has agreed to waive management fees and/or pay Fund expenses to the extent necessary so that the Fund's total annual operating expenses (excluding acquired fund fees and expenses, 12b-1 fees (if any), brokerage commissions, extraordinary items, interest or taxes) through the period ending December 31, 2027 do not exceed 1.00% of Shares. The expense limitation agreement may be terminated by the Board of Trustees of the Trust (the "Board" or "Trustees") at any time and also will terminate automatically upon the expiration or termination of the Fund's advisory contract with the Adviser.

*Example*

 

This Example is intended to help you compare the cost of investing in the Fund with the cost of investing in other funds. The Example assumes that you invest $10,000 in the Fund for the time periods indicated and then hold or redeem all of your Shares at the end of those periods. The Example also assumes that: (1) your investment has a 5% return each year, and (2) the Fund's operating expenses remain the same (taking into account the contractual expense limitation for the first year). Although your actual costs may be higher or lower, based on these assumptions your costs would be:

---

| | | | |
|:---|:---|:---|:---|
| **<u>1 Year</u>** | **<u>3 Years</u>** | **<u>5 Years</u>** | **<u>10 Years</u>** |
| $103 | $464 | $850 | $1931 |

---

&nbsp;&nbsp;&nbsp;&nbsp;2. The following paragraph is added to the section entitled "MANAGEMENT OF THE FUND – Investment Adviser" of the Prospectus:

The Adviser has agreed to waive management fees and/or pay Fund expenses to the extent necessary so that the Fund's total annual operating expenses (excluding acquired fund fees and expenses, 12b-1 fees (if any), brokerage commissions, extraordinary items, interest or taxes) through the period ending December 31, 2027 do not exceed 1.00% of Shares. The expense limitation agreement may be terminated by the Board at any time and also will terminate automatically upon the expiration or termination of the Fund's advisory contract with the Adviser.

**\* \* \* \* \***

**Investors should retain this supplement for future reference.**