# EDGAR Filing Document

**Accession Number:** 0000030126
**File Stem:** 0000894189-25-004270
**Filing Date:** 2025-6
**Character Count:** 4542
**Document Hash:** ad42b2d699048868f179f496bfc92173
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0000894189-25-004270.hdr.sgml**: 20250602

**ACCESSION NUMBER**: 0000894189-25-004270

**CONFORMED SUBMISSION TYPE**: 497

**PUBLIC DOCUMENT COUNT**: 1

**FILED AS OF DATE**: 20250602

**DATE AS OF CHANGE**: 20250602

**EFFECTIVENESS DATE**: 20250602

**FILER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** RMB INVESTORS TRUST
- **CENTRAL INDEX KEY:** 0000030126

**ORGANIZATION NAME:**
- **EIN:** 133536115
- **STATE OF INCORPORATION:** DE
- **FISCAL YEAR END:** 1231

**FILING VALUES:**
- **FORM TYPE:** 497
- **SEC ACT:** 1933 Act
- **SEC FILE NUMBER:** 002-17226
- **FILM NUMBER:** 251014653

**BUSINESS ADDRESS:**
- **STREET 1:** ONE NORTH WACKER DRIVE
- **STREET 2:** SUITE 3500
- **CITY:** CHICAGO
- **STATE:** IL
- **ZIP:** 60606
- **BUSINESS PHONE:** 8008743863

**MAIL ADDRESS:**
- **STREET 1:** ONE NORTH WACKER DRIVE
- **STREET 2:** SUITE 3500
- **CITY:** CHICAGO
- **STATE:** IL
- **ZIP:** 60606

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** BURNHAM INVESTORS TRUST
- **DATE OF NAME CHANGE:** 20000327

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** DREXEL BURNHAM FUND
- **DATE OF NAME CHANGE:** 19890706

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** DREXEL EQUITY FUND INC
- **DATE OF NAME CHANGE:** 19751208

## Series and Classes Contracts Data

### RMB Fund (Series ID: S000002997)

---

|  |  |  |
|:---|:---|:---|
| Class Name | Ticker Symbol | Class ID   |
| Class A    | RMBHX         | C000008242 |
| Class C    | RMBJX         | C000008244 |
| Class I    | RMBGX         | C000082356 |

---

### RMB Mendon Financial Services Fund (Series ID: S000002998)

---

|  |  |  |
|:---|:---|:---|
| Class Name | Ticker Symbol | Class ID   |
| Class A    | RMBKX         | C000008245 |
| Class C    | RMBNX         | C000008247 |
| Class I    | RMBLX         | C000082357 |

---

### RMB International Fund (Series ID: S000060194)

---

|  |  |  |
|:---|:---|:---|
| Class Name | Ticker Symbol | Class ID   |
| Class I    | RMBTX         | C000197003 |

---

### RMB Small Cap Fund (Series ID: S000065670)

---

|  |  |  |
|:---|:---|:---|
| Class Name | Ticker Symbol | Class ID   |
| Class I    | RMBBX         | C000212437 |

---

### RMB SMID Cap Fund (Series ID: S000065671)

---

|  |  |  |
|:---|:---|:---|
| Class Name | Ticker Symbol | Class ID   |
| Class I    | RMBMX         | C000212439 |

---

## Series and Classes Contracts Data

### RMB Fund (Series ID: S000002997)

| Class ID   | Class Name   | Ticker Symbol   |
|:---|:---|:---|
| C000008242 | Class A      | RMBHX           |
| C000008244 | Class C      | RMBJX           |
| C000082356 | Class I      | RMBGX           |

### RMB Mendon Financial Services Fund (Series ID: S000002998)

| Class ID   | Class Name   | Ticker Symbol   |
|:---|:---|:---|
| C000008245 | Class A      | RMBKX           |
| C000008247 | Class C      | RMBNX           |
| C000082357 | Class I      | RMBLX           |

### RMB International Fund (Series ID: S000060194)

| Class ID   | Class Name   | Ticker Symbol   |
|:---|:---|:---|
| C000197003 | Class I      | RMBTX           |

### RMB Small Cap Fund (Series ID: S000065670)

| Class ID   | Class Name   | Ticker Symbol   |
|:---|:---|:---|
| C000212437 | Class I      | RMBBX           |

### RMB SMID Cap Fund (Series ID: S000065671)

| Class ID   | Class Name   | Ticker Symbol   |
|:---|:---|:---|
| C000212439 | Class I      | RMBMX           |

**<u>RMB INVESTORS TRUST</u>**

**RMB Fund** 

**RMB Mendon Financial Services Fund**

**RMB International Fund**

**RMB Small Cap Fund**

**RMB SMID Cap Fund**

(each a "Fund" and collectively, the "Funds")

**Supplement Dated June 2, 2025 to the Statement of Additional Information ("SAI") dated May 1, 2025** <br>

*In the section of the SAI entitled "Trust Governance," the table disclosing information regarding the officers of RMB Investors Trust is updated to replace the row related to the Secretary of the Funds with the information set forth below.*

---

| | | | |
|:---|:---|:---|:---|
| **Name, Address and Age** | **Position Held**<br>**with the**<br>**Funds** | **Term of Office**<br>**and Time**<br>**Served** | **Principal Occupation During the Past 5 Years** |
| JENNIFER BOYCE<br>(1973) | Secretary | since 2025 | Senior Vice President, Senior Operations Manager of the Advisor (since 2017), Investment Operations Associate, IronBridge Capital Management (2011-2017) |

---

**Please retain this supplement with your SAI for future reference.**

<br> <br> <br>

VP/#71562326.3