# EDGAR Filing Document

**Accession Number:** 0000002110
**File Stem:** 0001683863-23-002229
**Filing Date:** 2023-3
**Character Count:** 11345
**Document Hash:** 885f06002b947c57193b84533ddd6f22
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001683863-23-002229.hdr.sgml**: 20230316

**ACCESSION NUMBER**: 0001683863-23-002229

**CONFORMED SUBMISSION TYPE**: 24F-2NT

**PUBLIC DOCUMENT COUNT**: 1

**CONFORMED PERIOD OF REPORT**: 20221231

**FILED AS OF DATE**: 20230316

**DATE AS OF CHANGE**: 20230316

**EFFECTIVENESS DATE**: 20230316

**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:** 24F-2NT
- **SEC ACT:** 1933 Act
- **SEC FILE NUMBER:** 002-34223
- **FILM NUMBER:** 23737960

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

---

### Columbia Acorn International (Series ID: S000009185)

---

|  |  |  |
|:---|:---|:---|
| Class Name                                         | Ticker Symbol | Class ID   |
| Columbia Acorn International Class A               | LAIAX         | C000024958 |
| Columbia Acorn International Class C               | LAICX         | C000024960 |
| Columbia Acorn International Institutional Class   | ACINX         | C000024961 |
| Columbia Acorn International Class R               | CACRX         | C000097732 |
| Columbia Acorn International Institutional 2 Class | CAIRX         | C000097733 |
| Columbia Acorn International Advisor Class         | CCIRX         | C000122738 |
| Columbia Acorn International Institutional 3 Class | CCYIX         | C000122739 |

---

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

---

|  |  |  |
|:---|:---|:---|
| Class Name                               | Ticker Symbol | Class ID   |
| Columbia Acorn USA Class A               | LAUAX         | C000024962 |
| Columbia Acorn USA Class C               | LAUCX         | C000024964 |
| Columbia Acorn USA Institutional Class   | AUSAX         | C000024965 |
| Columbia Acorn USA Advisor Class         | CUSAX         | C000122740 |
| Columbia Acorn USA Institutional 2 Class | CYSRX         | C000122741 |
| Columbia Acorn USA Institutional 3 Class | CUSYX         | C000122742 |

---

### Columbia Acorn International Select (Series ID: S000009188)

---

|  |  |  |
|:---|:---|:---|
| Class Name                                                | Ticker Symbol | Class ID   |
| Columbia Acorn International Select Class A               | LAFAX         | C000024970 |
| Columbia Acorn International Select Class C               | LFFCX         | C000024972 |
| Columbia Acorn International Select Institutional Class   | ACFFX         | C000024973 |
| Columbia Acorn International Select Institutional 2 Class | CRIRX         | C000122746 |
| Columbia Acorn International Select Institutional 3 Class | CSIRX         | C000122747 |
| Columbia Acorn International Select Advisor Class         | CILRX         | C000122748 |

---

### Columbia Thermostat Fund (Series ID: S000009189)

---

|  |  |  |
|:---|:---|:---|
| Class Name                                     | Ticker Symbol | Class ID   |
| Columbia Thermostat Fund Class A               | CTFAX         | C000024974 |
| Columbia Thermostat Fund Class C               | CTFDX         | C000024976 |
| Columbia Thermostat Fund Institutional Class   | COTZX         | C000024977 |
| Columbia Thermostat Fund Advisor Class         | CTORX         | C000122749 |
| Columbia Thermostat Fund Institutional 2 Class | CQTRX         | C000122750 |
| Columbia Thermostat Fund Institutional 3 Class | CYYYX         | C000122751 |

---

### Columbia Acorn European Fund (Series ID: S000033621)

---

|  |  |  |
|:---|:---|:---|
| Class Name                                         | Ticker Symbol | Class ID   |
| Columbia Acorn European Fund Class A               | CAEAX         | C000103324 |
| Columbia Acorn European Fund Class C               | CAECX         | C000103325 |
| Columbia Acorn European Fund Institutional Class   | CAEZX         | C000103327 |
| Columbia Acorn European Fund Institutional 2 Class | CAEEX         | C000122752 |
| Columbia Acorn European Fund Advisor Class         | CLOFX         | C000144049 |
| Columbia Acorn European Fund Institutional 3 Class | CAEYX         | C000171393 |

---

## 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 International (Series ID: S000009185)

| Class ID   | Class Name                                         | Ticker Symbol   |
|:---|:---|:---|
| C000024958 | Columbia Acorn International Class A               | LAIAX           |
| C000024960 | Columbia Acorn International Class C               | LAICX           |
| C000024961 | Columbia Acorn International Institutional Class   | ACINX           |
| C000097732 | Columbia Acorn International Class R               | CACRX           |
| C000097733 | Columbia Acorn International Institutional 2 Class | CAIRX           |
| C000122738 | Columbia Acorn International Advisor Class         | CCIRX           |
| C000122739 | Columbia Acorn International Institutional 3 Class | CCYIX           |

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

| Class ID   | Class Name                               | Ticker Symbol   |
|:---|:---|:---|
| C000024962 | Columbia Acorn USA Class A               | LAUAX           |
| C000024964 | Columbia Acorn USA Class C               | LAUCX           |
| C000024965 | Columbia Acorn USA Institutional Class   | AUSAX           |
| C000122740 | Columbia Acorn USA Advisor Class         | CUSAX           |
| C000122741 | Columbia Acorn USA Institutional 2 Class | CYSRX           |
| C000122742 | Columbia Acorn USA Institutional 3 Class | CUSYX           |

### Columbia Acorn International Select (Series ID: S000009188)

| Class ID   | Class Name                                                | Ticker Symbol   |
|:---|:---|:---|
| C000024970 | Columbia Acorn International Select Class A               | LAFAX           |
| C000024972 | Columbia Acorn International Select Class C               | LFFCX           |
| C000024973 | Columbia Acorn International Select Institutional Class   | ACFFX           |
| C000122746 | Columbia Acorn International Select Institutional 2 Class | CRIRX           |
| C000122747 | Columbia Acorn International Select Institutional 3 Class | CSIRX           |
| C000122748 | Columbia Acorn International Select Advisor Class         | CILRX           |

### Columbia Thermostat Fund (Series ID: S000009189)

| Class ID   | Class Name                                     | Ticker Symbol   |
|:---|:---|:---|
| C000024974 | Columbia Thermostat Fund Class A               | CTFAX           |
| C000024976 | Columbia Thermostat Fund Class C               | CTFDX           |
| C000024977 | Columbia Thermostat Fund Institutional Class   | COTZX           |
| C000122749 | Columbia Thermostat Fund Advisor Class         | CTORX           |
| C000122750 | Columbia Thermostat Fund Institutional 2 Class | CQTRX           |
| C000122751 | Columbia Thermostat Fund Institutional 3 Class | CYYYX           |

### Columbia Acorn European Fund (Series ID: S000033621)

| Class ID   | Class Name                                         | Ticker Symbol   |
|:---|:---|:---|
| C000103324 | Columbia Acorn European Fund Class A               | CAEAX           |
| C000103325 | Columbia Acorn European Fund Class C               | CAECX           |
| C000103327 | Columbia Acorn European Fund Institutional Class   | CAEZX           |
| C000122752 | Columbia Acorn European Fund Institutional 2 Class | CAEEX           |
| C000144049 | Columbia Acorn European Fund Advisor Class         | CLOFX           |
| C000171393 | Columbia Acorn European Fund Institutional 3 Class | CAEYX           |

## FORM 24F-2NT: Annual Notice of Securities Sold Pursuant to Rule 24f-2

### 24F-2NT: Filer Information

**Filer CIK:** 2110

**Is this a LIVE or TEST Filing?:** LIVE

**Filer Investment Company Type:** N-1A

### 24F-2NT: Annual Filing Information

**1. Name and address of issuer:**

- **Name of Issuer:** COLUMBIA ACORN TRUST

- **Address:** 227 W Monroe, Chicago, IL 60606

**2. The Name and EDGAR Identifier of each series or class of securities for which this Form is filed:**

- [ ] Check box if the Form is being filed for all series and classes of the issuer.

**3. Investment Company Act File Number:** 811-01829

   **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:** [ ]

**4(c). Check box if this is the last time the issuer will be filing this Form:** [ ]

**5. Calculation of registration fee:**

- **(i) Aggregate sale price of securities sold during the fiscal year:** $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:** $15073149198.26

- **(iv) Total available redemption credits [add Items 5(ii) and 5(iii)]:** $17341604040.02

- **(v) Net sales:** $0.00

- **(vi) Redemption credits available for use in future years:** $-16310539615.79

- **(vii) Multiplier for determining registration fee:** 0.0001102

- **(viii) Registration fee due:** $0.00

- **7. Interest due -- if this Form is being filed more than 90 days after the end of the issuer's fiscal year:** $0.00

- **8. Total of the amount of the registration fee due plus any interest due:** $0.00

**Signatures**

**Name and Title:** Martha A. Skinner Assistant Treasurer

**Date:** 03/16/2023

**Signature:** Martha A. Skinner