EDGAR Filing Documents for 0000898432-10-000511

Form 497 - Definitive materials:

SEC Accession No. 0000898432-10-000511

Filing Date

2010-04-07

Accepted

2010-04-07 14:12:24

Documents

Effectiveness Date

2010-04-07

Document Format Files

Seq	Description	Document	Type	Size
1		a497.htm	497	43920
3		kl-logo.gif	GRAPHIC	7432
	Complete submission text file	0000898432-10-000511.txt		60349

Series and Classes/Contracts Information:

Existing
	Status	Name	Ticker Symbol
CIK 0000002110
Series S000009184		Columbia Acorn Fund
Class/Contract C000024954		Columbia Acorn Fund Class A	LACAX
Class/Contract C000024955		Columbia Acorn Fund Class B	LACBX
Class/Contract C000024956		Columbia Acorn Fund Class C	LIACX
Class/Contract C000024957		Columbia Acorn Fund Class Z	ACRNX
	Status	Name	Ticker Symbol
CIK 0000002110
Series S000009185		Columbia Acorn International
Class/Contract C000024958		Columbia Acorn International Class A	LAIAX
Class/Contract C000024959		Columbia Acorn International Class B	LIABX
Class/Contract C000024960		Columbia Acorn International Class C	LAICX
Class/Contract C000024961		Columbia Acorn International Class Z	ACINX
	Status	Name	Ticker Symbol
CIK 0000002110
Series S000009186		Columbia Acorn USA
Class/Contract C000024962		Columbia Acorn USA Class A	LAUAX
Class/Contract C000024963		Columbia Acorn USA Class B	LAUBX
Class/Contract C000024964		Columbia Acorn USA Class C	LAUCX
Class/Contract C000024965		Columbia Acorn USA Class Z	AUSAX
	Status	Name	Ticker Symbol
CIK 0000002110
Series S000009187		Columbia Acorn Select
Class/Contract C000024966		Columbia Acorn Select Class A	LTFAX
Class/Contract C000024967		Columbia Acorn Select Class B	LTFBX
Class/Contract C000024968		Columbia Acorn Select Class C	LTFCX
Class/Contract C000024969		Columbia Acorn Select Class Z	ACTWX
	Status	Name	Ticker Symbol
CIK 0000002110
Series S000009188		Columbia Acorn International Select
Class/Contract C000024970		Columbia Acorn International Select Class A	LAFAX
Class/Contract C000024971		Columbia Acorn International Select Class B	LFFBX
Class/Contract C000024972		Columbia Acorn International Select Class C	LFFCX
Class/Contract C000024973		Columbia Acorn International Select Class Z	ACFFX
	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)