# EDGAR Filing Document

**Accession Number:** 0000002110
**File Stem:** 0000002110-25-000017
**Filing Date:** 2025-8
**Character Count:** 9599
**Document Hash:** cf0a4df180973f21fad2436fccc32c69
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0000002110-25-000017.hdr.sgml**: 20250822

**ACCESSION NUMBER**: 0000002110-25-000017

**CONFORMED SUBMISSION TYPE**: NPORT-P

**PUBLIC DOCUMENT COUNT**: 1

**CONFORMED PERIOD OF REPORT**: 20250630

**FILED AS OF DATE**: 20250822

**DATE AS OF CHANGE**: 20250822

**PERIOD START**: 20251231

**FILER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** COLUMBIA ACORN TRUST
- **CENTRAL INDEX KEY:** 0000002110

**ORGANIZATION NAME:**
- **EIN:** 362692100
- **STATE OF INCORPORATION:** MA
- **FISCAL YEAR END:** 1231

**FILING VALUES:**
- **FORM TYPE:** NPORT-P
- **SEC ACT:** 1940 Act
- **SEC FILE NUMBER:** 811-01829
- **FILM NUMBER:** 251244721

**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 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           |
| C000122750 | Columbia Thermostat Fund Institutional 2 Class | CQTRX           |
| C000122751 | Columbia Thermostat Fund Institutional 3 Class | CYYYX           |
| C000251062 | Columbia Thermostat Class S                    | COTDX           |

## Form NPORT-P: Monthly Portfolio Investments Report

### NPORT-P: Part A: General Information

**Item A.1. Information about the Registrant.**

- **a. Name of Registrant:** Columbia Acorn Trust

- **b. Investment Company Act file number:** 811-01829

- **c. CIK number of Registrant:** 0000002110

- **d. LEI of Registrant:** 549300DX0CWIN8VE1908

- **e. Address and telephone number of Registrant.**

  - **Street Address 1:** 71 S Wacker Dr.

  - **City:** Chicago

  - **State:** IL

  - **Foreign country:** US

  - **Zip / Postal Code:** 60606

  - **Telephone number:** 312-634-9200

**Item A.2. Information about the Series.**

- **a. Name of Series:** Columbia Thermostat Fund

- **b. EDGAR series identifier (if any):** S000009189

- **c. LEI of Series:** 549300EN4NJA2NPKY702

**Item A.3. Reporting period.**

- **a. Date of fiscal year-end:** 2025-12-31

- **b. Date as of which information is reported:** 2025-06-30

**Item A.4. Final filing**

Does the Fund anticipate that this will be its final filing on Form N-PORT? **No**

### Fund Information

**Total Assets:** $1249507323.43

**Total Liabilities:** $596709.02

**Net Assets:** $1248910614.41

**Currency Risk Metrics (dv01):**

- 

**Credit Spread Risk - Investment Grade (dv01):**

- **3-Month:** 0.000000000000 | **1-Year:** 0.000000000000 | **5-Year:** 0.000000000000 | **10-Year:** 0.000000000000 | **30-Year:** 0.000000000000

**Credit Spread Risk - Non-Investment Grade (dv01):**

- **3-Month:** 313408.356700000000 | **1-Year:** 0.000000000000 | **5-Year:** 0.000000000000 | **10-Year:** 0.000000000000 | **30-Year:** 67.667100000000

**Monthly Return Information**

| Class               | Month 1 Return (%)   | Month 2 Return (%)   | Month 3 Return (%)   |
|:---|:---|:---|:---|
| Class ID C000024974 | 1.59%                | 3.13%                | 3.30%                |
| Class ID C000024976 | 1.52%                | 3.12%                | 3.16%                |
| Class ID C000024977 | 1.62%                | 3.13%                | 3.30%                |
| Class ID C000122750 | 1.61%                | 3.16%                | 3.27%                |
| Class ID C000122751 | 1.61%                | 3.17%                | 3.34%                |
| Class ID C000251062 | 1.62%                | 3.13%                | 3.30%                |

**Monthly Gains & Losses**

| Period   | Net Realized Gain/Loss   | Net Unrealized Appreciation/Depreciation   |
|:---|:---|:---|
| Month 1  | $-7461840.53             | $23815570.84                               |
| Month 2  | $1813505.03              | $32880984.90                               |
| Month 3  | $17696343.99             | $17060972.98                               |

**Designated Index Information**

- **Index Name:** N/A

- **Index Identifier:** N/A

### Schedule of Portfolio Investments

| Name                                             | Title                                            | Identifiers                                   | Payoff Profile   | Asset Category   | Issuer Category   | Country   |   Balance | Units   | Value (USD)   | % of Net Assets   | Maturity Date   | Coupon Type   | Annualized Rate (%)   | Restricted?   |   Fair Value Level | Lending Status   |
|:---|:---|:---|:---|:---|:---|:---|---:|:---|:---|:---|:---|:---|:---|:---|---:|:---|
| COLUMBIA DIVERSIFIED FIXED INCOME ALLOCATION ETF | Columbia Diversified Fixed Income Allocation ETF | CUSIP: 19761L508<br>LEI: 5493000XJTC3ZADRR062 | Long             | EC               | RF                | US        |   4078290 | NS      | $74265660.90  | 5.95%             |  |  |  | No            |                  1 | On Loan: No      |
| COLUMBIA RESEARCH ENHANCED CORE ETF              | Columbia Research Enhanced Core ETF              | CUSIP: 19761L706<br>LEI: 5493007QSD2LFRRLVI83 | Long             | EC               | RF                | US        |   2732920 | NS      | $100544126.80 | 8.05%             |  |  |  | No            |                  1 | On Loan: No      |
| COLUMBIA LARGE CAP ENHANCED CORE FUND            | Columbia Large Cap Enhanced Core Fund            | CUSIP: 19765M221<br>LEI: 4NRO1OG1Z3OAV446QS07 | Long             | EC               | RF                | US        |   4496052 | NS      | $124810395.86 | 9.99%             |  |  |  | No            |                  1 | On Loan: No      |
| COLUMBIA LARGE CAP GROWTH FUND                   | Columbia Large Cap Growth Fund                   | CUSIP: 19765Y365<br>LEI: KG8XSD65WNAI0QHT2D47 | Long             | EC               | RF                | US        |    622897 | NS      | $50448411.43  | 4.04%             |  |  |  | No            |                  1 | On Loan: No      |
| COLUMBIA HIGH YIELD BOND FUND                    | Columbia High Yield Bond Fund                    | CUSIP: 19766C495<br>LEI: D0A8CA0QT3K0EUQM7B46 | Long             | EC               | RF                | US        |   6636426 | NS      | $73929783.49  | 5.92%             |  |  |  | No            |                  1 | On Loan: No      |
| COLUMBIA SHORT TERM CASH FUND                    | COLUMBIA SHORT TERM CASH FUND                    | CUSIP: 19766H239<br>LEI: N/A                  | Long             | STIV             | CORP              | US        |   3950796 | NS      | $3950005.71   | 0.32%             |  |  |  | No            |                  1 | On Loan: No      |
| COLUMBIA US GOVERNMENT MORTGAGE                  | Columbia Quality Income Fund                     | CUSIP: 19766J581<br>LEI: TJ30X3X4Z9WHP6KG4C22 | Long             | EC               | RF                | US        |   6153372 | NS      | $111683694.74 | 8.94%             |  |  |  | No            |                  1 | On Loan: No      |
| COLUMBIA TRUST CONTRARIAN CORE FD                | Columbia Contrarian Core Fund                    | CUSIP: 19766M709<br>LEI: XDPT7NN16OBIUU173D53 | Long             | EC               | RF                | US        |   3234272 | NS      | $125489769.08 | 10.05%            |  |  |  | No            |                  1 | On Loan: No      |
| COLUMBIA INTERMEDIATE BOND FUND                  | Columbia Total Return Bond Fund                  | CUSIP: 19766M758<br>LEI: 7TUF7LZJ7F8AC48WIE77 | Long             | EC               | RF                | US        |   6035102 | NS      | $185579381.64 | 14.86%            |  |  |  | No            |                  1 | On Loan: No      |
| COLUMBIA CORPORATE INCOME FUND                   | Columbia Corporate Income Fund                   | CUSIP: 19766M873<br>LEI: DERHCGZF5QUGBK32WQ53 | Long             | EC               | RF                | US        |  16102449 | NS      | $147981502.40 | 11.85%            |  |  |  | No            |                  1 | On Loan: No      |
| COLUMBIA FUNDS SERIES TRUST - CO                 | Columbia Large Cap Index Fund                    | CUSIP: 19766P736<br>LEI: ORPPOX410PHMRVFIOW55 | Long             | EC               | RF                | US        |   1853125 | NS      | $100439401.12 | 8.04%             |  |  |  | No            |                  1 | On Loan: No      |
| COLUMBIA US TREASURY INDEX FUND                  | Columbia US Treasury Index Fund                  | CUSIP: 19767A381<br>LEI: Z3NLJ4CB2CLTOYV0LQ23 | Long             | EC               | RF                | US        |  14786366 | NS      | $147863664.76 | 11.84%            |  |  |  | No            |                  1 | On Loan: No      |

### Signature

**Date Signed:** 2025-07-23

**Name of Applicant:** Columbia Acorn Trust

**Signature:** Martha Skinner

**Name of Signer:** Martha Skinner

**Title:** Assistant Treasurer