# EDGAR Filing Document

**Accession Number:** 0001016073
**File Stem:** 0001398344-25-020186
**Filing Date:** 2025-11
**Character Count:** 2309
**Document Hash:** ea5e7e07dc115ed4d3aeeb5397aa560e
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001398344-25-020186.hdr.sgml**: 20251103

**ACCESSION NUMBER**: 0001398344-25-020186

**CONFORMED SUBMISSION TYPE**: 497

**PUBLIC DOCUMENT COUNT**: 2

**FILED AS OF DATE**: 20251103

**DATE AS OF CHANGE**: 20251103

**EFFECTIVENESS DATE**: 20251103

**FILER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** DRIEHAUS MUTUAL FUNDS
- **CENTRAL INDEX KEY:** 0001016073

**ORGANIZATION NAME:**
- **EIN:** 000000000
- **STATE OF INCORPORATION:** DE
- **FISCAL YEAR END:** 1231

**FILING VALUES:**
- **FORM TYPE:** 497
- **SEC ACT:** 1933 Act
- **SEC FILE NUMBER:** 333-05265
- **FILM NUMBER:** 251443347

**BUSINESS ADDRESS:**
- **STREET 1:** 25 EAST ERIE ST
- **STREET 2:** 25 EAST ERIE STREET
- **CITY:** CHICAGO
- **STATE:** IL
- **ZIP:** 60611
- **BUSINESS PHONE:** 3125873800

**MAIL ADDRESS:**
- **STREET 1:** 25 E. ERIE STREET
- **CITY:** CHICAGO
- **STATE:** IL
- **ZIP:** 60611

## Series and Classes Contracts Data

### DRIEHAUS EMERGING MARKETS GROWTH FUND (Series ID: S000001909)

---

|  |  |  |
|:---|:---|:---|
| Class Name                | Ticker Symbol | Class ID   |
| Investor Share Class      | DREGX         | C000005025 |
| Institutional Share Class | DIEMX         | C000190956 |

---

## Series and Classes Contracts Data

### DRIEHAUS EMERGING MARKETS GROWTH FUND (Series ID: S000001909)

| Class ID   | Class Name                | Ticker Symbol   |
|:---|:---|:---|
| C000005025 | Investor Share Class      | DREGX           |
| C000190956 | Institutional Share Class | DIEMX           |

![](fp0096058-1_01.jpg)

25 East Erie Street

Chicago, Illinois 60611

1-800-560-6111

**DRIEHAUS EMERGING MARKETS GROWTH FUND**

**Investor Shares: DREGX**

**Institutional Shares: DIEMX**

**(the "Fund")**

SUPPLEMENT DATED NOVEMBER 3, 2025

TO THE PROSPECTUS AND SUMMARY PROSPECTUS FOR THE FUND

DATED APRIL 30, 2025

 

Effective November 3, 2025, Richard Thies and Howard Schwab are co-lead portfolio managers of the Fund. As of the date of this supplement, all references within the Prospectus and Summary Prospectus referring to Mr. Schwab's and Mr. Thies's management of the Fund shall be updated to reflect their new roles.

**PLEASE RETAIN THIS SUPPLEMENT FOR FUTURE REFERENCE.**

For more information, please call the Driehaus Mutual Funds at 1-800-560-6111