# EDGAR Filing Document

**Accession Number:** 0000030126
**File Stem:** 0000894189-23-000161
**Filing Date:** 2023-1
**Character Count:** 12305
**Document Hash:** bd4e5e05d18650c381d4a341cd33e0b4
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0000894189-23-000161.hdr.sgml**: 20230109

**ACCESSION NUMBER**: 0000894189-23-000161

**CONFORMED SUBMISSION TYPE**: 497

**PUBLIC DOCUMENT COUNT**: 1

**FILED AS OF DATE**: 20230109

**DATE AS OF CHANGE**: 20230109

**EFFECTIVENESS DATE**: 20230109

**FILER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** RMB INVESTORS TRUST
- **CENTRAL INDEX KEY:** 0000030126
- **IRS NUMBER:** 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:** 23517958

**BUSINESS ADDRESS:**
- **STREET 1:** 115 SOUTH LASALLE STREET
- **STREET 2:** 34TH FLOOR
- **CITY:** CHICAGO
- **STATE:** IL
- **ZIP:** 60603
- **BUSINESS PHONE:** 8008743863

**MAIL ADDRESS:**
- **STREET 1:** 115 SOUTH LASALLE STREET
- **STREET 2:** 34TH FLOOR
- **CITY:** CHICAGO
- **STATE:** IL
- **ZIP:** 60603

**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 Japan Fund (Series ID: S000060195)

---

|  |  |  |
|:---|:---|:---|
| Class Name | Ticker Symbol | Class ID   |
| Class I    | RMBPX         | C000197005 |

---

### 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 Japan Fund (Series ID: S000060195)

| Class ID   | Class Name   | Ticker Symbol   |
|:---|:---|:---|
| C000197005 | Class I      | RMBPX           |

### 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 Mendon Financial Services Fund** (the "Fund")

**Supplement Dated January 9, 2023 to the Prospectus dated May 1, 2022, as previously supplemented**<br>

*The information below replaces similar disclosure in the section of the Prospectus titled: "Fund Summaries—RMB Mendon Financial Services Fund—Adviser—Portfolio Managers"*

**<u>Portfolio Managers</u>**

Anton Schutz and Dan Goldfarb are primarily responsible for the day-to-day management of the Fund's portfolio. Mr. Schutz is President and Senior Portfolio Manager of Mendon, and has served as portfolio manager of the Fund since its inception in 1999. Mr. Goldfarb is a Portfolio Manager of Mendon, and has served as a portfolio manager of the Fund since May 2022.

*The information below replaces similar disclosure in the section of the Prospectus titled: "The Investment Adviser—Portfolio Management."*

**<u>Portfolio Management</u>**

The Adviser's and the Sub-Adviser's investment and portfolio decision-making process is based on a team approach. For each Fund, one or more portfolio managers from the investment team have primary responsibility for the day-to-day management of the Fund. Information regarding each Fund's portfolio manager(s), including the portfolio manager's title and length of service, is set forth below. The SAI provides additional information about each portfolio manager's compensation, other accounts under management, and ownership of securities in their respective Fund(s).

---

| | | |
|:---|:---|:---|
| **Portfolio Manager** | **Primary Role** | **Title and Recent Biography** |
| Todd Griesbach, CFA<br>*RMB Fund* | Responsible for the day-to-day management of the RMB Fund's investment portfolio since July 2016. | Senior Vice President and Portfolio Manager of the Adviser (since 2011). |
| Christopher C. Faber<br>*RMB Small Cap Fund<br>RMB SMID Cap Fund* | Mr. Faber, Senior Vice President and Portfolio Manager of the Adviser, has had primary day-to-day responsibility for the management of the Fund's portfolio since inception of its predecessor fund in August 2002. Prior to joining the Adviser in 2017, Mr. Faber was the President and a portfolio manager of IronBridge Capital Management, L.P. ("IronBridge") from 1999 to 2017. Mr. Faber was a founding partner of HOLT Value Associates, L.P., the former parent company of IronBridge, from May 1986 to April 1999. | Senior Vice President and Portfolio Manager of the Adviser (since 2017). |

---

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| | | |
|:---|:---|:---|
| Anton Schutz<br>*Financial Services Fund* | Responsible for the day-to-day management of the Financial Services Fund's investment portfolio since inception in 1999. Mr. Schutz is Mendon's Lead Portfolio Manager for the Financial Services Fund and has final decision-making authority with respect to the Fund's other portfolio managers. | President and Portfolio Manager of Mendon (since 1996). |
| Masa Hosomizu, CFA<br>*Japan Fund<br>International Fund* | Responsible for the day-to-day management of the Japan Fund's investment portfolio since inception in December 2017. Responsible for the day-to-day management of the International Fund's investment portfolio since 2019. Mr. Hosomizu is the Adviser's Lead Portfolio Manager for the Japan Fund and International Fund and has final decision-making authority with respect to the Funds' other portfolio managers. | Partner and Portfolio Manager of the Adviser (since 2013). Prior experience includes: Coghill Capital Management (Portfolio Manager) (2009 to 2013), (Research Analyst) (2005 to 2008); Nomura Securities (various roles including Equity Research Sales and Wealth Management Advisor) (1998 to 2005). Mr. Hosomizu received a BA in Law from the University of Tokyo and an MBA from the University of Chicago. |
| IIhwa Lee<br>*Japan Fund* | Responsible for the day-to-day management of the Japan Fund's investment portfolio since May 2022. | Vice President and Portfolio Manager of the Adviser (since 2017). Prior experience includes: Crystal Rock Capital Management, Equity Research Analyst (2016-2017); Cambridge Associates Asia Pte Ltd, Investment Director (2012-2015); Artisan Partners, Equity Research Intern (2011); and Mirae Asset Securities, Quant Analyst (2007-2010). Mr. Lee received a BA in Economics and Psychology from Seoul National University and an MBA from the University of Chicago Booth School of Business. |

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 2

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| | | |
|:---|:---|:---|
| Jim Plumb<br>*International Fund* | Responsible for the day-to-day management of the International Fund's investment portfolio since May 2022. | Vice President and Portfolio Manager of the Adviser (since June 2017). Prior experience includes: IronBridge Capital Management (Senior Equity Analyst) (2005 to 2017). |
| Dan GoldFarb<br>*Financial Services Fund* | Responsible for the day-to-day management of the Financial Services Fund's investment portfolio since May 2022. | Portfolio Manager of the Adviser (since September 2020). Prior experience includes: Self-employed from 2019 to 2020; Portfolio Manager at AlphaOne Micro Cap Fund (2017 to 2019). Mr. GoldFarb received a BA from Hobart College and an MBA from the Owen Graduate School of Management, Vanderbilt University. |

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

 3

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

**RMB Mendon Financial Services Fund** (the "Fund")

**Supplement Dated January 9, 2023 to the Statement of Additional Information ("SAI") dated May 1, 2022**

*The information below replaces the disclosure in the section of the SAI titled: "Portfolio Managers—Other Accounts Managed"*

The following table provides information about funds and accounts, other than the Funds, for which the Funds' portfolio managers were primarily responsible for the day-to-day portfolio management as of December 31, 2021.

---

| | | | | | | |
|:---|:---|:---|:---|:---|:---|:---|
| | **Number of Other Accounts Managed and Total Assets by Account Type** | **Number of Other Accounts Managed and Total Assets by Account Type** | **Number of Other Accounts Managed and Total Assets by Account Type** | **Number of Other Accounts and Total Assets for Which Advisory Fee is Performance Based** | **Number of Other Accounts and Total Assets for Which Advisory Fee is Performance Based** | **Number of Other Accounts and Total Assets for Which Advisory Fee is Performance Based** |
|<br>**Name of Portfolio Manager** | **Registered Investment Companies** | **Other Pooled Investment Vehicles** | **Other Accounts** | **Registered Investment Companies** | **Other Pooled Investment Vehicles** | **Other Accounts** |
| **RMB Fund** | | | | | | |
| Todd Griesbach |  |  | 1,562 accounts with $1,167,679,878 in assets |  |  |  |
| **Financial Services Fund** |  |  |  |  |  |  |
| Anton V. Schutz |  | 2 accounts with $32,810,032 in assets | 1 account with $15,356,665 in assets |  |  |  |
| Dan GoldFarb |  |  |  |  |  |  |
| **International Fund** |  |  |  |  |  |  |
| Masa Hosomizu |  | 1 account with $46,950,875 in assets | 143 accounts with $193,604,637 in assets |  |  |  |
| Jim Plumb |  | 1 account with $46,950,875 in assets | 143 accounts with $193,604,637 in assets |  |  |  |
| **Japan Fund** |  |  |  |  |  |  |
| Masa Hosomizu |  | 1 account with $46,950,875 in assets | 143 accounts with $193,604,637 in assets |  |  |  |
| IIhwa Lee |  |  |  |  |  |  |
| **Small Cap Fund and SMID Cap Fund** |  |  |  |  |  |  |
| Christopher C. Faber |  |  | 580 accounts with $400,188,818 in assets |  |  |  |

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 4

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*The information below replaces the disclosure in the section of the SAI titled: "Portfolio Managers—Ownership of Securities"*

The following table sets forth the dollar range of equity securities of the Funds beneficially owned by each portfolio manager as of December 31, 2021.

---

| | |
|:---|:---|
| | **Dollar Range of Fund Shares Beneficially Owned** |
| **RMB Fund** | |
| Todd Griesbach | $10001 - $50000 |
| **Financial Services Fund** |  |
| Anton Schutz | $100001 - $500000 |
| Dan GoldFarb |  |
| **International Fund** |  |
| Masa Hosomizu | $50001 - $100000 |
| Jim Plumb | $50001 - $100000 |
| **Japan Fund** |  |
| Masa Hosomizu | $50001 - $100000 |
| IIhwa Lee |  |
| **Small Cap Fund** |  |
| Christopher C. Faber | Over $1,000,000 |
| **SMID Cap Fund** |  |
| Christopher C. Faber | Over $1,000,000 |

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

 5

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