# EDGAR Filing Document

**Accession Number:** 0000002110
**File Stem:** 9999999995-23-000381
**Filing Date:** 2023-2
**Character Count:** 4438
**Document Hash:** 834a8ee4467e54a974b6a0d8afd52221
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**9999999995-23-000381.hdr.sgml**: 20230213

**ACCESSION NUMBER**: 9999999995-23-000381

**CONFORMED SUBMISSION TYPE**: EFFECT

**PUBLIC DOCUMENT COUNT**: 1

**FILED AS OF DATE**: 20230210

**DATE AS OF CHANGE**: 20230213

**EFFECTIVENESS DATE**: 20230210

**FILER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** COLUMBIA ACORN TRUST
- **CENTRAL INDEX KEY:** 0000002110
- **IRS NUMBER:** 362692100
- **STATE OF INCORPORATION:** MA
- **FISCAL YEAR END:** 1231

**FILING VALUES:**
- **FORM TYPE:** EFFECT
- **SEC ACT:** 1933 Act
- **SEC FILE NUMBER:** 333-269553
- **FILM NUMBER:** 23614380

**BUSINESS ADDRESS:**
- **STREET 1:** 71 S. WACKER DRIVE, SUITE 2500
- **CITY:** CHICAGO
- **STATE:** IL
- **ZIP:** 60606
- **BUSINESS PHONE:** 3126349200

**MAIL ADDRESS:**
- **STREET 1:** 71 S. WACKER DRIVE, SUITE 2500
- **CITY:** CHICAGO
- **STATE:** IL
- **ZIP:** 60606

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** LIBERTY ACORN TRUST
- **DATE OF NAME CHANGE:** 20010424

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** ACORN INVESTMENT TRUST
- **DATE OF NAME CHANGE:** 19940204

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** ACORN FUND INC
- **DATE OF NAME CHANGE:** 19920703
**CENTRAL INDEX KEY**: 0000002110

**CENTRAL INDEX KEY**: 0000002110

**CENTRAL INDEX KEY**: 0000002110

**CENTRAL INDEX KEY**: 0000002110

**CENTRAL INDEX KEY**: 0000002110

**CENTRAL INDEX KEY**: 0000002110

**CENTRAL INDEX KEY**: 0000002110

**CENTRAL INDEX KEY**: 0000002110

**CENTRAL INDEX KEY**: 0000002110

**CENTRAL INDEX KEY**: 0000002110

**CENTRAL INDEX KEY**: 0000002110

**CENTRAL INDEX KEY**: 0000002110

## Series and Classes Contracts Data

### Columbia Acorn Fund (Series ID: S000009184)

| Class ID   | Class Name                  | Ticker Symbol   |
|:---|:---|:---|
| C000024954 | Columbia Acorn Fund Class A | LACAX           |

### Columbia Acorn USA (Series ID: S000009186)

| Class ID   | Class Name                 | Ticker Symbol   |
|:---|:---|:---|
| C000024962 | Columbia Acorn USA Class A | LAUAX           |

### Columbia Acorn Fund (Series ID: S000009184)

| Class ID   | Class Name                  | Ticker Symbol   |
|:---|:---|:---|
| C000024956 | Columbia Acorn Fund Class C | LIACX           |

### Columbia Acorn USA (Series ID: S000009186)

| Class ID   | Class Name                 | Ticker Symbol   |
|:---|:---|:---|
| C000024964 | Columbia Acorn USA Class C | LAUCX           |

### Columbia Acorn Fund (Series ID: S000009184)

| Class ID   | Class Name                              | Ticker Symbol   |
|:---|:---|:---|
| C000024957 | Columbia Acorn Fund Institutional Class | ACRNX           |

### Columbia Acorn USA (Series ID: S000009186)

| Class ID   | Class Name                             | Ticker Symbol   |
|:---|:---|:---|
| C000024965 | Columbia Acorn USA Institutional Class | AUSAX           |

### Columbia Acorn Fund (Series ID: S000009184)

| Class ID   | Class Name                        | Ticker Symbol   |
|:---|:---|:---|
| C000122735 | Columbia Acorn Fund Advisor Class | CEARX           |

### Columbia Acorn USA (Series ID: S000009186)

| Class ID   | Class Name                       | Ticker Symbol   |
|:---|:---|:---|
| C000122740 | Columbia Acorn USA Advisor Class | CUSAX           |

### Columbia Acorn Fund (Series ID: S000009184)

| Class ID   | Class Name                                | Ticker Symbol   |
|:---|:---|:---|
| C000122736 | Columbia Acorn Fund Institutional 2 Class | CRBRX           |

### Columbia Acorn USA (Series ID: S000009186)

| Class ID   | Class Name                               | Ticker Symbol   |
|:---|:---|:---|
| C000122741 | Columbia Acorn USA Institutional 2 Class | CYSRX           |

### Columbia Acorn Fund (Series ID: S000009184)

| Class ID   | Class Name                                | Ticker Symbol   |
|:---|:---|:---|
| C000122737 | Columbia Acorn Fund Institutional 3 Class | CRBYX           |

### Columbia Acorn USA (Series ID: S000009186)

| Class ID   | Class Name                               | Ticker Symbol   |
|:---|:---|:---|
| C000122742 | Columbia Acorn USA Institutional 3 Class | CUSYX           |

### UNITED STATES
### SECURITIES AND EXCHANGE COMMISSION
**Washington, D.C. 20549**

## Notice of Effectiveness

**Date:** February 10, 2023

**Time:** 14:20:00

**Form Type:** N-14

---

**CIK:** 0000002110

**Company Name:** COLUMBIA ACORN TRUST

**File Number:** 333-269553