Form 24F-2 Annual Filing Filers submitting a 24F-2 where the total fee due is based upon the aggregate net sales of all series and classes with the same fiscal year should only complete one copy of the form. To begin the form select "Add 24F-2 Form".

Filers calculating fees on a class-by-class or series-by-series basis must complete a separate Form 24F-2 for each class or series. The application will allow you to create a separate form for each series or class within a single submission. Simply select "Add 24F-2 Form" to begin each additional form.

Read instructions at end of Form before preparing Form. See "INSTRUCTIONS" link above.

Annual Filing Information Record:1

1. Name and address of issuer:

Name of Issuer	COLUMBIA ACORN TRUST
Street 1	227 W Monroe
Street 2	Suite 3000
City	Chicago
State	ILLINOIS
Country	UNITED STATES
Zip code and zip code extension or foreign postal code	60606

2. The name and EDGAR identifier of each series or class of securities for which this Form is filed (if the Form is being filed for all series and classes of securities of the issuer, check the box but do not list series or classes):

Series ID Record:1

Series Name	COLUMBIA ACORN FUND
Series ID	S000009184

Class ID Record:1

Class Name	Columbia Acorn Fund Class A
Class ID	C000024954

Class ID Record:2

Class Name	Columbia Acorn Fund Class C
Class ID	C000024956

Class ID Record:3

Class Name	Columbia Acorn Fund Institutional Class
Class ID	C000024957

Class ID Record:4

Class Name	Columbia Acorn Fund Advisor Class
Class ID	C000122735

Class ID Record:5

Class Name	Columbia Acorn Fund Institutional 2 Class
Class ID	C000122736

Class ID Record:6

Class Name	Columbia Acorn Fund Institutional 3 Class
Class ID	C000122737

Series ID Record:2

Series Name	COLUMBIA ACORN INTERNATIONAL
Series ID	S000009185

Class ID Record:1

Class Name	Columbia Acorn International Class A
Class ID	C000024958

Class ID Record:2

Class Name	Columbia Acorn International Class C
Class ID	C000024960

Class ID Record:3

Class Name	Columbia Acorn International Institutional Class
Class ID	C000024961

Class ID Record:4

Class Name	Columbia Acorn International Class R
Class ID	C000097732

Class ID Record:5

Class Name	Columbia Acorn International Institutional 2 Class
Class ID	C000097733

Class ID Record:6

Class Name	Columbia Acorn International Advisor Class
Class ID	C000122738

Class ID Record:7

Class Name	Columbia Acorn International Institutional 3 Class
Class ID	C000122739

Series ID Record:3

Series Name	COLUMBIA ACORN USA
Series ID	S000009186

Class ID Record:1

Class Name	Columbia Acorn USA Class A
Class ID	C000024962

Class ID Record:2

Class Name	Columbia Acorn USA Class C
Class ID	C000024964

Class ID Record:3

Class Name	Columbia Acorn USA Institutional Class
Class ID	C000024965

Class ID Record:4

Class Name	Columbia Acorn USA Advisor Class
Class ID	C000122740

Class ID Record:5

Class Name	Columbia Acorn USA Institutional 2 Class
Class ID	C000122741

Class ID Record:6

Class Name	Columbia Acorn USA Institutional 3 Class
Class ID	C000122742

Series ID Record:4

Series Name	COLUMBIA ACORN INTERNATIONAL SELECT
Series ID	S000009188

Class ID Record:1

Class Name	Columbia Acorn International Select Class A
Class ID	C000024970

Class ID Record:2

Class Name	Columbia Acorn International Select Class C
Class ID	C000024972

Class ID Record:3

Class Name	Columbia Acorn International Select Institutional Class
Class ID	C000024973

Class ID Record:4

Class Name	Columbia Acorn International Select Institutional 2 Class
Class ID	C000122746

Class ID Record:5

Class Name	Columbia Acorn International Select Institutional 3 Class
Class ID	C000122747

Class ID Record:6

Class Name	Columbia Acorn International Select Advisor Class
Class ID	C000122748

Series ID Record:5

Series Name	COLUMBIA THERMOSTAT FUND
Series ID	S000009189

Class ID Record:1

Class Name	Columbia Thermostat Fund Class A
Class ID	C000024974

Class ID Record:2

Class Name	Columbia Thermostat Fund Class C
Class ID	C000024976

Class ID Record:3

Class Name	Columbia Thermostat Fund Institutional Class
Class ID	C000024977

Class ID Record:4

Class Name	Columbia Thermostat Fund Advisor Class
Class ID	C000122749

Class ID Record:5

Class Name	Columbia Thermostat Fund Institutional 2 Class
Class ID	C000122750

Class ID Record:6

Class Name	Columbia Thermostat Fund Institutional 3 Class
Class ID	C000122751

Series ID Record:6

Series Name	COLUMBIA ACORN EUROPEAN FUND
Series ID	S000033621

Class ID Record:1

Class Name	Columbia Acorn European Fund Class A
Class ID	C000103324

Class ID Record:2

Class Name	Columbia Acorn European Fund Class C
Class ID	C000103325

Class ID Record:3

Class Name	Columbia Acorn European Fund Institutional Class
Class ID	C000103327

Class ID Record:4

Class Name	Columbia Acorn European Fund Institutional 2 Class
Class ID	C000122752

Class ID Record:5

Class Name	Columbia Acorn European Fund Advisor Class
Class ID	C000144049

Class ID Record:6

Class Name	Columbia Acorn European Fund Institutional 3 Class
Class ID	C000171393

3. Investment Company Act File Number:

811-01829

Securities Act File Number Record:1

Securities Act File Number:

002-34223

4(a). Last day of fiscal year for which this Form is filed:	12/31/2022
4(b). Check box if this Form is being filed late (i.e., more than 90 calendar days after the end of the issuer’s fiscal year). (See Instruction A.2) Note: If the Form is being filed late, interest must be paid on the registration fee due.
4(c). Check box if this is the last time the issuer will be filing this Form.

5. Calculation of registration fee (if calculating on a class-by-class or series-by- series basis, provide the EDGAR identifier for each such class or series):

Series or Class (Contract) ID
(i) Aggregate sale price of securities sold during the fiscal year pursuant to section 24(f):	1031064424.23
(ii) Aggregate price of securities redeemed or repurchased during the fiscal year:	2268454841.76
(iii) Aggregate price of securities redeemed or repurchased during any prior fiscal year ending no earlier than October 11, 1995 that were not previously used to reduce registration fees payable to the Commission:	15073149198.26
(iv) Total available redemption credits [add Items 5(ii) and 5(iii)]:	17341604040.02
(v) Net sales -- if Item 5(i) is greater than Item 5(iv) [subtract Item 5(iv) from Item 5(i)]:	0.00
vi) Redemption credits available for use in future years -- if Item 5(i) is less than Item 5(iv) [subtract Item 5(iv) from Item 5(i)]:	(16310539615.79)
(vii) Multiplier for determining registration fee (See Instruction C.9):	0.0001102
viii) Registration fee due [multiply Item 5(v) by Item 5(vii)] (enter "0" if no fee is due):	0.00

6. Prepaid Shares

If the response to Item 5(i) was determined by deducting an amount of securities that were registered under the Securities Act of 1933 pursuant to rule 24e-2 as in effect before October 11, 1997, then report the amount of securities (number of shares or other units) deducted here:
If there is a number of shares or other units that were registered pursuant to rule 24e-2 remaining unsold at the end of the fiscal year for which this form is filed that are available for use by the issuer in future fiscal years, then state that number here:

7. Interest due -- if this Form is being filed more than 90 days after the end of the issuer’s fiscal year (see Instruction D):

0

8. Total of the amount of the registration fee due plus any interest due [line 5(viii) plus line 7]:

0.00

9. Explanatory Notes (if any):

Signatures

This report has been signed below by the following persons on behalf of the issuer and in the capacities and on the dates indicated. By (Signature and Title)*

Name and Title	Martha A. Skinner Assistant Treasurer
Date	03/16/2023
Signature	Martha A. Skinner