EDGAR Filing Documents for 0001193125-11-350078

Form 497 - Definitive materials:

SEC Accession No. 0001193125-11-350078

Filing Date

2011-12-22

Accepted

2011-12-22 12:02:55

Documents

Effectiveness Date

2011-12-22

Document Format Files

Seq	Description	Document	Type	Size
1	COLUMBIA ACORN TRUST	d268981d497.htm	497	652
	Complete submission text file	0001193125-11-350078.txt		430263

Data Files

Seq	Description	Document	Type	Size
2	XBRL INSTANCE DOCUMENT	cik0000002110-20111212.xml	EX-101.INS	22780
3	XBRL TAXONOMY EXTENSION SCHEMA	cik0000002110-20111212.xsd	EX-101.SCH	3291
4	XBRL TAXONOMY EXTENSION CALCULATION LINKBASE	cik0000002110-20111212_cal.xml	EX-101.CAL	5074
5	XBRL TAXONOMY EXTENSION DEFINITION LINKBASE	cik0000002110-20111212_def.xml	EX-101.DEF	4746
6	XBRL TAXONOMY EXTENSION LABEL LINKBASE	cik0000002110-20111212_lab.xml	EX-101.LAB	148049
7	XBRL TAXONOMY EXTENSION PRESENTATION LINKBASE	cik0000002110-20111212_pre.xml	EX-101.PRE	28591

Series and Classes/Contracts Information:

Existing
	Status	Name	Ticker Symbol
CIK 0000002110
Series S000009189		Columbia Thermostat Fund
Class/Contract C000024974		Columbia Thermostat Fund Class A	CTFAX
Class/Contract C000024975		Columbia Thermostat Fund Class B	CTFBX
Class/Contract C000024976		Columbia Thermostat Fund Class C	CTFDX
Class/Contract C000024977		Columbia Thermostat Fund Class Z	COTZX

Mailing Address 227 W MONROE STE 3000 CHICAGO IL 60606

Business Address 227 W MONROE STE 3000 CHICAGO IL 60606 3126349200

COLUMBIA ACORN TRUST (Filer) CIK: 0000002110 (see all company filings)