# EDGAR Filing Document

**Accession Number:** 0000002110
**File Stem:** 0001193125-23-038415
**Filing Date:** 2023-2
**Character Count:** 3308
**Document Hash:** de8335218377b34e57ebb826675ca671
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001193125-23-038415.hdr.sgml**: 20230214

**ACCESSION NUMBER**: 0001193125-23-038415

**CONFORMED SUBMISSION TYPE**: 497J

**PUBLIC DOCUMENT COUNT**: 1

**FILED AS OF DATE**: 20230214

**DATE AS OF CHANGE**: 20230214

**EFFECTIVENESS DATE**: 20230214

**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:** 497J
- **SEC ACT:** 1933 Act
- **SEC FILE NUMBER:** 333-269553
- **FILM NUMBER:** 23626226

**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

## Series and Classes Contracts Data

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

| Class ID   | Class Name                                | Ticker Symbol   |
|:---|:---|:---|
| C000024954 | Columbia Acorn Fund Class A               | LACAX           |
| C000024956 | Columbia Acorn Fund Class C               | LIACX           |
| C000024957 | Columbia Acorn Fund Institutional Class   | ACRNX           |
| C000122735 | Columbia Acorn Fund Advisor Class         | CEARX           |
| C000122736 | Columbia Acorn Fund Institutional 2 Class | CRBRX           |
| C000122737 | Columbia Acorn Fund Institutional 3 Class | CRBYX           |

**COLUMBIA ACORN TRUST** 

(the "Registrant")

**1933 Act Registration No. 002-34223** 

**1940 Act Registration No. 811-01829** 

71 S. Wacker Drive, Suite 2500

Chicago, IL 60606

February 14, 2023

***BY EDGAR***

Securities and Exchange Commission

100 F Street, N.E.

Washington, D.C. 20549

Ladies and Gentlemen:

In accordance with Rule 497(j) of Regulation C under the Securities Act of 1933 (the "Securities Act"), the Registrant certifies that:

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;a. the form of statement of additional information dated February 10, 2023, relating to the issuance of
shares of the Registrant in connection with the reorganization of Columbia Acorn USA into Columbia Acorn Fund, each a series of the Registrant, that would have been filed under paragraph (b) of Rule 497 under the Securities Act would not have
differed from that contained in the most recent pre-effective amendment to the Registrant's registration statement on Form N-14; and

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;b. the text of the most recent pre-effective amendment to the
Registrant's registration statement on Form N-14 was filed with the Commission via EDGAR on February 9, 2023 (File No. 333-269553) and became effective on
February 10, 2023 (Accession No. 9999999995-23-000381).

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| | |
|:---|:---|
| Very truly yours, | Very truly yours, |
| By: | /s/ Ryan C. Larrenaga |
|  | Ryan C. Larrenaga |
|  | Assistant Secretary |

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