# EDGAR Filing Document

**Accession Number:** 0000002110
**File Stem:** 0001410368-26-055109
**Filing Date:** 2026-5
**Character Count:** 93088
**Document Hash:** 706ffcae16559259eb362ef6bdc17c3b
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001410368-26-055109.hdr.sgml**: 20260528

**ACCESSION NUMBER**: 0001410368-26-055109

**CONFORMED SUBMISSION TYPE**: NPORT-P

**PUBLIC DOCUMENT COUNT**: 3

**CONFORMED PERIOD OF REPORT**: 20260331

**FILED AS OF DATE**: 20260528

**DATE AS OF CHANGE**: 20260528

**PERIOD START**: 20261231

**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:** 261033115

**BUSINESS ADDRESS:**
- **STREET 1:** 290 CONGRESS STREET
- **CITY:** BOSTON
- **STATE:** MA
- **ZIP:** 02210
- **BUSINESS PHONE:** 8003456611

**MAIL ADDRESS:**
- **STREET 1:** 290 CONGRESS STREET
- **CITY:** BOSTON
- **STATE:** MA
- **ZIP:** 02210

**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 International Select (Series ID: S000009188)

| Class ID   | Class Name                                                | Ticker Symbol   |
|:---|:---|:---|
| C000024970 | Columbia Acorn International Select Class A               | LAFAX           |
| 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           |
| C000251061 | Columbia Acorn International Select Class S               | ACFEX           |

## Nport-Ex

![](img3c841fa41.jpg)

**First Quarter Report**

March 31, 2026 (Unaudited)

Columbia Acorn<sup>®</sup> Fund

Columbia Acorn International<sup>®</sup>

Columbia Acorn International Select<sup>SM</sup>

Columbia Thermostat Fund<sup>SM</sup>

Columbia Acorn European Fund<sup>SM</sup>

---

| | | |
|:---|:---|:---|
| **Not FDIC or NCUA Insured** | **No Financial Institution Guarantee** | **May Lose Value** |

---

------

Portfolio of Investments

Columbia Acorn<sup>®</sup> Fund, March 31, 2026 (Unaudited)

(Percentages represent value of investments compared to net assets)

**Investments in securities**

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;

---

| | | |
|:---|:---|:---|
| **Common Stocks 97.8%** | **Common Stocks 97.8%** | **Common Stocks 97.8%** |
| **Issuer** | **Shares** | **Value ($)** |
| **Communication Services 0.6%** | **Communication Services 0.6%** | **Communication Services 0.6%** |
| **Media 0.6%** | **Media 0.6%** | **Media 0.6%** |
| NIQ Global Intelligence PLC<sup>(a)</sup> <br>| &nbsp;&nbsp; 1232928 | &nbsp;&nbsp; 14018391 |
| **Total Communication Services** | **Total Communication Services** | &nbsp;&nbsp; **14018391** |
| **Consumer Discretionary 10.4%** | **Consumer Discretionary 10.4%** | **Consumer Discretionary 10.4%** |
| **Automobile Components 1.6%** | **Automobile Components 1.6%** | **Automobile Components 1.6%** |
| Dorman Products, Inc.<sup>(a)</sup> <br>| &nbsp;&nbsp; 344653 | &nbsp;&nbsp; 35967987 |
| **Hotels, Restaurants & Leisure 4.4%** | **Hotels, Restaurants & Leisure 4.4%** | **Hotels, Restaurants & Leisure 4.4%** |
| Churchill Downs, Inc. | &nbsp;&nbsp; 539022 | &nbsp;&nbsp; 48420346 |
| Rush Street Interactive, Inc.<sup>(a)</sup> <br>| &nbsp;&nbsp; 631555 | &nbsp;&nbsp; 13736321 |
| Wingstop, Inc. | &nbsp;&nbsp; 242143 | &nbsp;&nbsp; 37524901 |
| Total |  | &nbsp;&nbsp; 99681568 |
| **Household Durables 4.4%** | **Household Durables 4.4%** | **Household Durables 4.4%** |
| Cavco Industries, Inc.<sup>(a)</sup> <br>| &nbsp;&nbsp; 83379 | &nbsp;&nbsp; 40379616 |
| SharkNinja, Inc.<sup>(a)</sup> <br>| &nbsp;&nbsp; 238583 | &nbsp;&nbsp; 25265940 |
| TopBuild Corp.<sup>(a)</sup> <br>| &nbsp;&nbsp; 92442 | &nbsp;&nbsp; 32474874 |
| Total |  | &nbsp;&nbsp; 98120430 |
| **Total Consumer Discretionary** | **Total Consumer Discretionary** | &nbsp;&nbsp; **233769985** |
| **Consumer Staples 4.9%** | **Consumer Staples 4.9%** | **Consumer Staples 4.9%** |
| **Consumer Staples Distribution & Retail 2.4%** | **Consumer Staples Distribution & Retail 2.4%** | **Consumer Staples Distribution & Retail 2.4%** |
| BJ's Wholesale Club Holdings, Inc.<sup>(a)</sup> <br>| &nbsp;&nbsp; 350621 | &nbsp;&nbsp; 34508119 |
| Sprouts Farmers Market, Inc.<sup>(a)</sup> <br>| &nbsp;&nbsp; 248151 | &nbsp;&nbsp; 19139886 |
| Total |  | &nbsp;&nbsp; 53648005 |
| **Household Products 1.3%** | **Household Products 1.3%** | **Household Products 1.3%** |
| WD-40 Co. | &nbsp;&nbsp; 146352 | &nbsp;&nbsp; 29847027 |
| **Personal Care Products 1.2%** | **Personal Care Products 1.2%** | **Personal Care Products 1.2%** |
| elf Beauty, Inc.<sup>(a)</sup> <br>| &nbsp;&nbsp; 444462 | &nbsp;&nbsp; 26938842 |
| **Total Consumer Staples** | **Total Consumer Staples** | &nbsp;&nbsp; **110433874** |
| **Energy 2.5%** | **Energy 2.5%** | **Energy 2.5%** |
| **Oil, Gas & Consumable Fuels 2.5%** | **Oil, Gas & Consumable Fuels 2.5%** | **Oil, Gas & Consumable Fuels 2.5%** |
| Antero Resources Corp.<sup>(a)</sup> <br>| &nbsp;&nbsp; 355938 | &nbsp;&nbsp; 15106009 |
| Devon Energy Corp. | &nbsp;&nbsp; 421587 | &nbsp;&nbsp; 21214258 |
| EQT Corp. | &nbsp;&nbsp; 311439 | &nbsp;&nbsp; 19819978 |
| Total |  | &nbsp;&nbsp; 56140245 |
| **Total Energy** | **Total Energy** | &nbsp;&nbsp; **56140245** |

---

---

| | | |
|:---|:---|:---|
| **Common Stocks (continued)** | **Common Stocks (continued)** | **Common Stocks (continued)** |
| **Issuer** | **Shares** | **Value ($)** |
| **Financials 10.4%** | **Financials 10.4%** | **Financials 10.4%** |
| **Banks 1.9%** | **Banks 1.9%** | **Banks 1.9%** |
| Lakeland Financial Corp. | &nbsp;&nbsp; 214229 | &nbsp;&nbsp; 12292460 |
| Western Alliance Bancorp | &nbsp;&nbsp; 419941 | &nbsp;&nbsp; 29752820 |
| Total |  | &nbsp;&nbsp; 42045280 |
| **Capital Markets 7.5%** | **Capital Markets 7.5%** | **Capital Markets 7.5%** |
| Blue Owl Capital, Inc. | &nbsp;&nbsp; 1391042 | &nbsp;&nbsp; 12700213 |
| Carlyle Group, Inc. (The) | &nbsp;&nbsp; 950835 | &nbsp;&nbsp; 46010906 |
| GCM Grosvenor, Inc., Class A<sup>(b)</sup> <br>| &nbsp;&nbsp; 4428750 | &nbsp;&nbsp; 43401750 |
| Hamilton Lane, Inc., Class A | &nbsp;&nbsp; 169441 | &nbsp;&nbsp; 16842435 |
| Miami International Holdings, Inc.<sup>(a)</sup> <br>| &nbsp;&nbsp; 426477 | &nbsp;&nbsp; 16598485 |
| StoneX Group, Inc.<sup>(a)</sup> <br>| &nbsp;&nbsp; 413430 | &nbsp;&nbsp; 33343130 |
| Total |  | &nbsp;&nbsp; 168896919 |
| **Insurance 1.0%** | **Insurance 1.0%** | **Insurance 1.0%** |
| Ryan Specialty Holdings, Inc., Class A | &nbsp;&nbsp; 647394 | &nbsp;&nbsp; 21843073 |
| **Total Financials** | **Total Financials** | &nbsp;&nbsp; **232785272** |
| **Health Care 21.8%** | **Health Care 21.8%** | **Health Care 21.8%** |
| **Biotechnology 8.3%** | **Biotechnology 8.3%** | **Biotechnology 8.3%** |
| Absci Corp.<sup>(a)</sup> <br>| &nbsp;&nbsp; 2566842 | &nbsp;&nbsp; 7700526 |
| Annexon, Inc.<sup>(a)</sup> <br>| &nbsp;&nbsp; 975637 | &nbsp;&nbsp; 5405029 |
| BridgeBio Pharma, Inc.<sup>(a)</sup> <br>| &nbsp;&nbsp; 316495 | &nbsp;&nbsp; 23502919 |
| Insmed, Inc.<sup>(a)</sup> <br>| &nbsp;&nbsp; 336411 | &nbsp;&nbsp; 55009927 |
| Ionis Pharmaceuticals, Inc.<sup>(a)</sup> <br>| &nbsp;&nbsp; 148670 | &nbsp;&nbsp; 11163630 |
| Madrigal Pharmaceuticals, Inc.<sup>(a)</sup> <br>| &nbsp;&nbsp; 26454 | &nbsp;&nbsp; 13847875 |
| Neurocrine Biosciences, Inc.<sup>(a)</sup> <br>| &nbsp;&nbsp; 116190 | &nbsp;&nbsp; 15306871 |
| NewAmsterdam Pharma Co. NV<sup>(a)</sup> <br>| &nbsp;&nbsp; 363308 | &nbsp;&nbsp; 11629489 |
| Nuvalent, Inc., Class A<sup>(a)</sup> <br>| &nbsp;&nbsp; 174598 | &nbsp;&nbsp; 17887565 |
| Revolution Medicines, Inc.<sup>(a)</sup> <br>| &nbsp;&nbsp; 135489 | &nbsp;&nbsp; 13176305 |
| Rhythm Pharmaceuticals, Inc.<sup>(a)</sup> <br>| &nbsp;&nbsp; 124824 | &nbsp;&nbsp; 10855943 |
| Total |  | &nbsp;&nbsp; 185486079 |
| **Health Care Equipment & Supplies 2.4%** | **Health Care Equipment & Supplies 2.4%** | **Health Care Equipment & Supplies 2.4%** |
| Glaukos Corp.<sup>(a)</sup> <br>| &nbsp;&nbsp; 311474 | &nbsp;&nbsp; 33533291 |
| iRhythm Holdings, Inc.<sup>(a)</sup> <br>| &nbsp;&nbsp; 169788 | &nbsp;&nbsp; 20038380 |
| Total |  | &nbsp;&nbsp; 53571671 |

---

Columbia Acorn<sup>®</sup> Fund \| 2026

------

Portfolio of Investments (continued)

Columbia Acorn<sup>®</sup> Fund, March 31, 2026 (Unaudited)

---

| | | |
|:---|:---|:---|
| **Common Stocks (continued)** | **Common Stocks (continued)** | **Common Stocks (continued)** |
| **Issuer** | **Shares** | **Value ($)** |
| **Health Care Providers & Services 6.6%** | **Health Care Providers & Services 6.6%** | **Health Care Providers & Services 6.6%** |
| Alignment Healthcare, Inc.<sup>(a)</sup> <br>| &nbsp;&nbsp; 1618094 | &nbsp;&nbsp; 28510816 |
| Billiontoone, Inc., Class A<sup>(a)</sup> <br>| &nbsp;&nbsp; 166205 | &nbsp;&nbsp; 13120223 |
| Encompass Health Corp. | &nbsp;&nbsp; 230244 | &nbsp;&nbsp; 22271502 |
| Guardant Health, Inc.<sup>(a)</sup> <br>| &nbsp;&nbsp; 303784 | &nbsp;&nbsp; 28060528 |
| HealthEquity, Inc.<sup>(a)</sup> <br>| &nbsp;&nbsp; 422315 | &nbsp;&nbsp; 35292865 |
| Pennant Group, Inc. (The)<sup>(a)</sup> <br>| &nbsp;&nbsp; 699307 | &nbsp;&nbsp; 21314877 |
| Total |  | &nbsp;&nbsp; 148570811 |
| **Health Care Technology 0.5%** | **Health Care Technology 0.5%** | **Health Care Technology 0.5%** |
| Doximity, Inc., Class A<sup>(a)</sup> <br>| &nbsp;&nbsp; 432308 | &nbsp;&nbsp; 10072777 |
| **Life Sciences Tools & Services 3.2%** | **Life Sciences Tools & Services 3.2%** | **Life Sciences Tools & Services 3.2%** |
| Adaptive Biotechnologies Corp.<sup>(a)</sup> <br>| &nbsp;&nbsp; 1148404 | &nbsp;&nbsp; 15939847 |
| BioLife Solutions, Inc.<sup>(a)</sup> <br>| &nbsp;&nbsp; 696462 | &nbsp;&nbsp; 13288495 |
| Charles River Laboratories International, Inc.<sup>(a)</sup> <br>| &nbsp;&nbsp; 70538 | &nbsp;&nbsp; 12167805 |
| DNA Script<sup>(a),(c),(d),(e)</sup> <br>| &nbsp;&nbsp; 1139 | &nbsp;&nbsp; 94710 |
| Fortrea Holdings, Inc.<sup>(a)</sup> <br>| &nbsp;&nbsp; 1173131 | &nbsp;&nbsp; 11050894 |
| Repligen Corp.<sup>(a)</sup> <br>| &nbsp;&nbsp; 159623 | &nbsp;&nbsp; 18806782 |
| Total |  | &nbsp;&nbsp; 71348533 |
| **Pharmaceuticals 0.8%** | **Pharmaceuticals 0.8%** | **Pharmaceuticals 0.8%** |
| Crinetics Pharmaceuticals, Inc.<sup>(a)</sup> <br>| &nbsp;&nbsp; 252431 | &nbsp;&nbsp; 9168294 |
| Definium Therapeutics, Inc.<sup>(a)</sup> <br>| &nbsp;&nbsp; 512390 | &nbsp;&nbsp; 9684171 |
| Total |  | &nbsp;&nbsp; 18852465 |
| **Total Health Care** | **Total Health Care** | &nbsp;&nbsp; **487902336** |
| **Industrials 29.4%** | **Industrials 29.4%** | **Industrials 29.4%** |
| **Aerospace & Defense 10.0%** | **Aerospace & Defense 10.0%** | **Aerospace & Defense 10.0%** |
| Aerovironment, Inc.<sup>(a)</sup> <br>| &nbsp;&nbsp; 153583 | &nbsp;&nbsp; 28113368 |
| Astronics Corp.<sup>(a)</sup> <br>| &nbsp;&nbsp; 340163 | &nbsp;&nbsp; 22699077 |
| Axon Enterprise, Inc.<sup>(a)</sup> <br>| &nbsp;&nbsp; 61466 | &nbsp;&nbsp; 26103995 |
| Curtiss-Wright Corp. | &nbsp;&nbsp; 65825 | &nbsp;&nbsp; 44834724 |
| FTAI Aviation Ltd. | &nbsp;&nbsp; 109872 | &nbsp;&nbsp; 26918640 |
| Karman Holdings, Inc.<sup>(a)</sup> <br>| &nbsp;&nbsp; 220172 | &nbsp;&nbsp; 17624769 |
| Kratos Defense & Security Solutions, Inc.<sup>(a)</sup> <br>| &nbsp;&nbsp; 233250 | &nbsp;&nbsp; 16446457 |
| VSE Corp. | &nbsp;&nbsp; 223919 | &nbsp;&nbsp; 41290664 |
| Total |  | &nbsp;&nbsp; 224031694 |
| **Building Products 2.6%** | **Building Products 2.6%** | **Building Products 2.6%** |
| Janus International Group, Inc.<sup>(a)</sup> <br>| &nbsp;&nbsp; 3345300 | &nbsp;&nbsp; 17228295 |
| Modine Manufacturing Co.<sup>(a)</sup> <br>| &nbsp;&nbsp; 189531 | &nbsp;&nbsp; 41073263 |
| Total |  | &nbsp;&nbsp; 58301558 |

---

---

| | | |
|:---|:---|:---|
| **Common Stocks (continued)** | **Common Stocks (continued)** | **Common Stocks (continued)** |
| **Issuer** | **Shares** | **Value ($)** |
| **Commercial Services & Supplies 0.7%** | **Commercial Services & Supplies 0.7%** | **Commercial Services & Supplies 0.7%** |
| Healthcare Services Group, Inc.<sup>(a)</sup> <br>| &nbsp;&nbsp; 784900 | &nbsp;&nbsp; 14559895 |
| **Construction & Engineering 3.8%** | **Construction & Engineering 3.8%** | **Construction & Engineering 3.8%** |
| MasTec, Inc.<sup>(a)</sup> <br>| &nbsp;&nbsp; 131179 | &nbsp;&nbsp; 42205532 |
| Sterling Infrastructure, Inc.<sup>(a)</sup> <br>| &nbsp;&nbsp; 107856 | &nbsp;&nbsp; 43926513 |
| Total |  | &nbsp;&nbsp; 86132045 |
| **Electrical Equipment 2.1%** | **Electrical Equipment 2.1%** | **Electrical Equipment 2.1%** |
| Bloom Energy Corp., Class A<sup>(a)</sup> <br>| &nbsp;&nbsp; 288864 | &nbsp;&nbsp; 39138183 |
| Nextpower, Inc., Class A<sup>(a)</sup> <br>| &nbsp;&nbsp; 71632 | &nbsp;&nbsp; 8635238 |
| Total |  | &nbsp;&nbsp; 47773421 |
| **Ground Transportation 1.1%** | **Ground Transportation 1.1%** | **Ground Transportation 1.1%** |
| Knight-Swift Transportation Holdings, Inc. | &nbsp;&nbsp; 437705 | &nbsp;&nbsp; 25203054 |
| **Machinery 4.7%** | **Machinery 4.7%** | **Machinery 4.7%** |
| Esab Corp. | &nbsp;&nbsp; 372810 | &nbsp;&nbsp; 36035815 |
| Mueller Water Products, Inc., Class A | &nbsp;&nbsp; 483160 | &nbsp;&nbsp; 13282068 |
| SPX Technologies, Inc.<sup>(a)</sup> <br>| &nbsp;&nbsp; 279748 | &nbsp;&nbsp; 55932815 |
| Total |  | &nbsp;&nbsp; 105250698 |
| **Professional Services 2.7%** | **Professional Services 2.7%** | **Professional Services 2.7%** |
| Parsons Corp.<sup>(a)</sup> <br>| &nbsp;&nbsp; 486820 | &nbsp;&nbsp; 26371039 |
| Paylocity Holding Corp.<sup>(a)</sup> <br>| &nbsp;&nbsp; 167076 | &nbsp;&nbsp; 18050891 |
| Willdan Group, Inc.<sup>(a)</sup> <br>| &nbsp;&nbsp; 206119 | &nbsp;&nbsp; 15780471 |
| Total |  | &nbsp;&nbsp; 60202401 |
| **Trading Companies & Distributors 1.7%** | **Trading Companies & Distributors 1.7%** | **Trading Companies & Distributors 1.7%** |
| Applied Industrial Technologies, Inc. | &nbsp;&nbsp; 84867 | &nbsp;&nbsp; 22516913 |
| McGrath Rentcorp | &nbsp;&nbsp; 136694 | &nbsp;&nbsp; 15074614 |
| Total |  | &nbsp;&nbsp; 37591527 |
| **Total Industrials** | **Total Industrials** | &nbsp;&nbsp; **659046293** |
| **Information Technology 17.8%** | **Information Technology 17.8%** | **Information Technology 17.8%** |
| **Communications Equipment 3.9%** | **Communications Equipment 3.9%** | **Communications Equipment 3.9%** |
| InterDigital, Inc. | &nbsp;&nbsp; 140996 | &nbsp;&nbsp; 42580792 |
| Viavi Solutions, Inc.<sup>(a)</sup> <br>| &nbsp;&nbsp; 1333081 | &nbsp;&nbsp; 44364936 |
| Total |  | &nbsp;&nbsp; 86945728 |
| **Electronic Equipment, Instruments & Components 4.4%** | **Electronic Equipment, Instruments & Components 4.4%** | **Electronic Equipment, Instruments & Components 4.4%** |
| Advanced Energy Industries, Inc. | &nbsp;&nbsp; 28789 | &nbsp;&nbsp; 9290498 |
| Celestica, Inc.<sup>(a)</sup> <br>| &nbsp;&nbsp; 172300 | &nbsp;&nbsp; 48533464 |
| Coherent Corp.<sup>(a)</sup> <br>| &nbsp;&nbsp; 172879 | &nbsp;&nbsp; 41181507 |
| Total |  | &nbsp;&nbsp; 99005469 |

---

Columbia Acorn<sup>®</sup> Fund \| 2026

------

Portfolio of Investments (continued)

Columbia Acorn<sup>®</sup> Fund, March 31, 2026 (Unaudited)

---

| | | |
|:---|:---|:---|
| **Common Stocks (continued)** | **Common Stocks (continued)** | **Common Stocks (continued)** |
| **Issuer** | **Shares** | **Value ($)** |
| **IT Services 0.4%** | **IT Services 0.4%** | **IT Services 0.4%** |
| Applied Digital Corp.<sup>(a)</sup> <br>| &nbsp;&nbsp; 439896 | &nbsp;&nbsp; 10443131 |
| **Semiconductors & Semiconductor Equipment 4.9%** | **Semiconductors & Semiconductor Equipment 4.9%** | **Semiconductors & Semiconductor Equipment 4.9%** |
| Credo Technology Group Holding Ltd.<sup>(a)</sup> <br>| &nbsp;&nbsp; 147591 | &nbsp;&nbsp; 13854367 |
| Lattice Semiconductor Corp.<sup>(a)</sup> <br>| &nbsp;&nbsp; 184881 | &nbsp;&nbsp; 17149562 |
| Marvell Technology, Inc. | &nbsp;&nbsp; 298398 | &nbsp;&nbsp; 29556322 |
| Semtech Corp.<sup>(a)</sup> <br>| &nbsp;&nbsp; 421296 | &nbsp;&nbsp; 32393449 |
| SiTime Corp.<sup>(a)</sup> <br>| &nbsp;&nbsp; 48846 | &nbsp;&nbsp; 16868966 |
| Total |  | &nbsp;&nbsp; 109822666 |
| **Software 4.2%** | **Software 4.2%** | **Software 4.2%** |
| Dynatrace, Inc.<sup>(a)</sup> <br>| &nbsp;&nbsp; 695469 | &nbsp;&nbsp; 25718444 |
| Hut 8 Corp.<sup>(a)</sup> <br>| &nbsp;&nbsp; 240717 | &nbsp;&nbsp; 11292034 |
| Monday.com Ltd.<sup>(a)</sup> <br>| &nbsp;&nbsp; 106304 | &nbsp;&nbsp; 7346669 |
| SailPoint, Inc.<sup>(a)</sup> <br>| &nbsp;&nbsp; 944155 | &nbsp;&nbsp; 12500612 |
| Workiva, Inc., Class A<sup>(a)</sup> <br>| &nbsp;&nbsp; 184993 | &nbsp;&nbsp; 11031133 |
| Zeta Global Holdings Corp., Class A<sup>(a)</sup> <br>| &nbsp;&nbsp; 895992 | &nbsp;&nbsp; 14264193 |
| Zscaler, Inc.<sup>(a)</sup> <br>| &nbsp;&nbsp; 83570 | &nbsp;&nbsp; 11724035 |
| Total |  | &nbsp;&nbsp; 93877120 |
| **Total Information Technology** | **Total Information Technology** | &nbsp;&nbsp; **400094114** |
| &nbsp;&nbsp; Total Common Stocks <br>(Cost $1,925,239,900) | &nbsp;&nbsp; Total Common Stocks <br>(Cost $1,925,239,900) | &nbsp;&nbsp; **2194190510** |

---

---

| | | |
|:---|:---|:---|
| **Exchange-Traded Equity Funds 1.6%** | **Exchange-Traded Equity Funds 1.6%** | **Exchange-Traded Equity Funds 1.6%** |
|  | **Shares** | **Value ($)** |
| **Sector 1.6%** | **Sector 1.6%** | **Sector 1.6%** |
| State Street SPDR S&P Biotech ETF | &nbsp;&nbsp; 278004 | &nbsp;&nbsp; 35509451 |
| &nbsp;&nbsp; Total Exchange-Traded Equity Funds <br>(Cost $28,404,882) | &nbsp;&nbsp; Total Exchange-Traded Equity Funds <br>(Cost $28,404,882) | &nbsp;&nbsp; **35509451** |
| **Money Market Funds 0.9%** | **Money Market Funds 0.9%** | **Money Market Funds 0.9%** |
| Columbia Short-Term Cash Fund, 3.790%<sup>(b),(f)</sup> <br>| &nbsp;&nbsp; 19982329 | &nbsp;&nbsp; 19974336 |
| &nbsp;&nbsp; Total Money Market Funds <br>(Cost $19,971,514) | &nbsp;&nbsp; Total Money Market Funds <br>(Cost $19,971,514) | &nbsp;&nbsp; **19974336** |
| **Total Investments in Securities** <br>**(Cost: $1,973,616,296)** | **Total Investments in Securities** <br>**(Cost: $1,973,616,296)** | &nbsp;&nbsp; **2249674297** |
| **Other Assets & Liabilities, Net** |  | &nbsp;&nbsp; **(5875383)**<br>|
| **Net Assets** | **Net Assets** | &nbsp;&nbsp; **2243798914** |

---

**Notes to Portfolio of Investments** 

&nbsp;&nbsp;&nbsp;&nbsp;(a) Non-income producing investment.

&nbsp;&nbsp;&nbsp;&nbsp;(b) Under the Investment Company Act of 1940, an affiliated company is one in which the Fund owns 5% or more of the company's outstanding voting securities, or a company which is under common ownership or control with the Fund. The value of the
 holdings and transactions in these affiliated companies during the period ended March 31, 2026 are as follows:

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;

---

| | | | | | | | | |
|:---|:---|:---|:---|:---|:---|:---|:---|:---|
| **Affiliated issuers** | **Beginning** <br>**of period($)**<br>| **Purchases($)** | **Sales($)** | **Net change in** <br>**unrealized** <br>**appreciation** <br>**(depreciation)($)**<br>| **End of** <br>**period($)**<br>| **Realized gain** <br>**(loss)($)**<br>| **Dividends($)** | **End of** <br>**period shares**<br>|
| Columbia Short-Term Cash Fund, 3.790% | Columbia Short-Term Cash Fund, 3.790% | Columbia Short-Term Cash Fund, 3.790% | Columbia Short-Term Cash Fund, 3.790% | Columbia Short-Term Cash Fund, 3.790% | Columbia Short-Term Cash Fund, 3.790% | Columbia Short-Term Cash Fund, 3.790% | Columbia Short-Term Cash Fund, 3.790% | Columbia Short-Term Cash Fund, 3.790% |
|  | 15279105 | &nbsp;&nbsp; 183720481 | &nbsp;&nbsp; (179024209)<br>| &nbsp;&nbsp; (1041)<br>| &nbsp;&nbsp; 19974336 | &nbsp;&nbsp; (2205)<br>| &nbsp;&nbsp; 261355 | &nbsp;&nbsp; 19982329 |
| GCM Grosvenor, Inc., Class A | GCM Grosvenor, Inc., Class A | GCM Grosvenor, Inc., Class A | GCM Grosvenor, Inc., Class A | GCM Grosvenor, Inc., Class A | GCM Grosvenor, Inc., Class A | GCM Grosvenor, Inc., Class A | GCM Grosvenor, Inc., Class A | GCM Grosvenor, Inc., Class A |
|  | 50133450 | &nbsp;&nbsp; — | &nbsp;&nbsp; — | &nbsp;&nbsp; (6731700)<br>| &nbsp;&nbsp; 43401750 | &nbsp;&nbsp; — | &nbsp;&nbsp; 531450 | &nbsp;&nbsp; 4428750 |
| Total | 65412555 |  |  | &nbsp;&nbsp; (6732741)<br>| &nbsp;&nbsp; 63376086 | &nbsp;&nbsp; (2205)<br>| &nbsp;&nbsp; 792805 |  |

---

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;

Columbia Acorn<sup>®</sup> Fund \| 2026

------

Portfolio of Investments (continued)

Columbia Acorn<sup>®</sup> Fund, March 31, 2026 (Unaudited)

**Notes to Portfolio of Investments (continued)**

&nbsp;&nbsp;&nbsp;&nbsp;(c) Represents fair value as determined in good faith under procedures approved by the
 Board of Trustees. At March 31, 2026, the total value of these securities amounted to $94,710, which represents less than 0.01% of total net assets.

&nbsp;&nbsp;&nbsp;&nbsp;(d) Denotes a restricted security, which is subject to legal or contractual restrictions
 on resale under federal securities laws. Disposal of a restricted investment may involve time-consuming negotiations and expenses, and prompt sale at an acceptable
 price may be difficult to achieve. Private placement securities are generally considered to be restricted, although certain of those securities may be traded between
 qualified institutional investors under the provisions of Section 4(a)(2) and Rule 144A. The Fund will not incur any registration costs upon such a trade. At March
 31, 2026, the total market value of these securities amounted to $94,710, which represents less than 0.01% of total net assets. Additional information on these securities
 is as follows:

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;

---

| | | | | |
|:---|:---|:---|:---|:---|
| **Security** | **Acquisition** <br>**Dates**<br>| **Shares** | **Cost ($)** | **Value ($)** |
| DNA Script | 10/01/2021 | &nbsp;&nbsp; 1139 | &nbsp;&nbsp; 993179 | &nbsp;&nbsp; 94710 |

---

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;

&nbsp;&nbsp;&nbsp;&nbsp;(e) Valuation based on significant unobservable inputs.

&nbsp;&nbsp;&nbsp;&nbsp;(f) The rate shown is the seven-day current annualized yield at March 31, 2026.

Investments are valued using policies described in the Notes to Financial Statements included within the most recent financial statements and additional information.

Columbia Acorn<sup>®</sup> Fund \| 2026

------

Portfolio of Investments

Columbia Acorn International<sup>®</sup>, March 31, 2026 (Unaudited)

(Percentages represent value of investments compared to net assets)

**Investments in securities**

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;

---

| | | |
|:---|:---|:---|
| **Common Stocks 98.5%** | **Common Stocks 98.5%** | **Common Stocks 98.5%** |
| **Issuer** | **Shares** | **Value ($)** |
| **Australia 2.0%** | **Australia 2.0%** | **Australia 2.0%** |
| ALS Ltd. | &nbsp;&nbsp; 763610 | &nbsp;&nbsp; 11209483 |
| CAR Group Ltd. | &nbsp;&nbsp; 245518 | &nbsp;&nbsp; 3919294 |
| **Total** | **Total** | &nbsp;&nbsp; **15128777** |
| **Canada 1.5%** | **Canada 1.5%** | **Canada 1.5%** |
| CCL Industries, Inc., Class B | &nbsp;&nbsp; 64213 | &nbsp;&nbsp; 4023294 |
| Finning International, Inc. | &nbsp;&nbsp; 119677 | &nbsp;&nbsp; 7405504 |
| **Total** | **Total** | &nbsp;&nbsp; **11428798** |
| **China 1.4%** | **China 1.4%** | **China 1.4%** |
| Silergy Corp. | &nbsp;&nbsp; 1138000 | &nbsp;&nbsp; 10371353 |
| **Denmark 1.0%** | **Denmark 1.0%** | **Denmark 1.0%** |
| FLSmidth & Co. A/S | &nbsp;&nbsp; 95384 | &nbsp;&nbsp; 7225956 |
| **Finland 2.8%** | **Finland 2.8%** | **Finland 2.8%** |
| Konecranes OYJ | &nbsp;&nbsp; 307904 | &nbsp;&nbsp; 10105628 |
| Valmet OYJ | &nbsp;&nbsp; 382556 | &nbsp;&nbsp; 10946292 |
| **Total** | **Total** | &nbsp;&nbsp; **21051920** |
| **France 4.3%** | **France 4.3%** | **France 4.3%** |
| Gaztransport Et Technigaz SA | &nbsp;&nbsp; 76782 | &nbsp;&nbsp; 18058645 |
| Lisi SA | &nbsp;&nbsp; 84378 | &nbsp;&nbsp; 5159101 |
| Robertet SA | &nbsp;&nbsp; 4147 | &nbsp;&nbsp; 3874920 |
| Virbac SA | &nbsp;&nbsp; 13867 | &nbsp;&nbsp; 5727256 |
| **Total** | **Total** | &nbsp;&nbsp; **32819922** |
| **Germany 4.5%** | **Germany 4.5%** | **Germany 4.5%** |
| CTS Eventim AG & Co. KGaA | &nbsp;&nbsp; 96909 | &nbsp;&nbsp; 5676029 |
| flatexDEGIRO AG | &nbsp;&nbsp; 262133 | &nbsp;&nbsp; 9039748 |
| Nemetschek SE | &nbsp;&nbsp; 111618 | &nbsp;&nbsp; 8355724 |
| Renk Group AG | &nbsp;&nbsp; 187745 | &nbsp;&nbsp; 11221836 |
| **Total** | **Total** | &nbsp;&nbsp; **34293337** |
| **Greece 1.9%** | **Greece 1.9%** | **Greece 1.9%** |
| National Bank of Greece SA | &nbsp;&nbsp; 914195 | &nbsp;&nbsp; 14122379 |
| **Ireland 2.6%** | **Ireland 2.6%** | **Ireland 2.6%** |
| Bank of Ireland Group PLC | &nbsp;&nbsp; 1089587 | &nbsp;&nbsp; 19768641 |

---

---

| | | |
|:---|:---|:---|
| **Common Stocks (continued)** | **Common Stocks (continued)** | **Common Stocks (continued)** |
| **Issuer** | **Shares** | **Value ($)** |
| **Italy 3.9%** | **Italy 3.9%** | **Italy 3.9%** |
| Carel Industries SpA | &nbsp;&nbsp; 241694 | &nbsp;&nbsp; 6159932 |
| Prysmian SpA | &nbsp;&nbsp; 194146 | &nbsp;&nbsp; 22926912 |
| **Total** | **Total** | &nbsp;&nbsp; **29086844** |
| **Japan 41.0%** | **Japan 41.0%** | **Japan 41.0%** |
| Anritsu Corp. | &nbsp;&nbsp; 207600 | &nbsp;&nbsp; 3769674 |
| Asics Corp. | &nbsp;&nbsp; 566200 | &nbsp;&nbsp; 15222352 |
| BayCurrent, Inc. | &nbsp;&nbsp; 194400 | &nbsp;&nbsp; 5627167 |
| Capcom Co., Ltd. | &nbsp;&nbsp; 714600 | &nbsp;&nbsp; 15100877 |
| Disco Corp. | &nbsp;&nbsp; 31400 | &nbsp;&nbsp; 12798116 |
| DMG Mori Co., Ltd. | &nbsp;&nbsp; 312400 | &nbsp;&nbsp; 4826020 |
| Gunma Bank Ltd. (The) | &nbsp;&nbsp; 748400 | &nbsp;&nbsp; 9973934 |
| Kokusai Electric Corp. | &nbsp;&nbsp; 360100 | &nbsp;&nbsp; 12176672 |
| Konami Holdings Corp. | &nbsp;&nbsp; 47500 | &nbsp;&nbsp; 5853338 |
| Kraftia Corp. | &nbsp;&nbsp; 308900 | &nbsp;&nbsp; 18683980 |
| Kyoritsu Maintenance Co., Ltd. | &nbsp;&nbsp; 607100 | &nbsp;&nbsp; 9422009 |
| MatsukiyoCocokara & Co. | &nbsp;&nbsp; 538300 | &nbsp;&nbsp; 8567756 |
| Modec, Inc. | &nbsp;&nbsp; 87600 | &nbsp;&nbsp; 8292576 |
| Nippon Sanso Holdings Corp. | &nbsp;&nbsp; 432900 | &nbsp;&nbsp; 15349942 |
| Nissin Foods Holdings Co., Ltd. | &nbsp;&nbsp; 629100 | &nbsp;&nbsp; 11940135 |
| Niterra Co., Ltd. | &nbsp;&nbsp; 444100 | &nbsp;&nbsp; 20940012 |
| Nomura Real Estate Holdings, Inc. | &nbsp;&nbsp; 2734500 | &nbsp;&nbsp; 17729907 |
| Omron Corp. | &nbsp;&nbsp; 409300 | &nbsp;&nbsp; 11775190 |
| Open House Co., Ltd. | &nbsp;&nbsp; 175800 | &nbsp;&nbsp; 11267328 |
| Recruit Holdings Co., Ltd. | &nbsp;&nbsp; 105600 | &nbsp;&nbsp; 4600989 |
| Renesas Electronics Corp. | &nbsp;&nbsp; 697200 | &nbsp;&nbsp; 9968029 |
| Sanwa Holdings Corp. | &nbsp;&nbsp; 495050 | &nbsp;&nbsp; 11258555 |
| Sekisui Chemical Co., Ltd. | &nbsp;&nbsp; 720000 | &nbsp;&nbsp; 12087839 |
| Shimadzu Corp. | &nbsp;&nbsp; 299800 | &nbsp;&nbsp; 7124106 |
| Simplex Holdings, Inc. | &nbsp;&nbsp; 2400400 | &nbsp;&nbsp; 12340130 |
| Suntory Beverage & Food Ltd. | &nbsp;&nbsp; 463600 | &nbsp;&nbsp; 13092112 |
| Taisei Corp. | &nbsp;&nbsp; 186800 | &nbsp;&nbsp; 19352806 |
| **Total** | **Total** | &nbsp;&nbsp; **309141551** |
| **Jersey 1.8%** | **Jersey 1.8%** | **Jersey 1.8%** |
| Yellow Cake PLC<sup>(a)</sup> <br>| &nbsp;&nbsp; 1722108 | &nbsp;&nbsp; 13791748 |

---

Columbia Acorn International<sup>®</sup> \| 2026

------

Portfolio of Investments (continued)

Columbia Acorn International<sup>®</sup>, March 31, 2026 (Unaudited)

---

| | | |
|:---|:---|:---|
| **Common Stocks (continued)** | **Common Stocks (continued)** | **Common Stocks (continued)** |
| **Issuer** | **Shares** | **Value ($)** |
| **Netherlands 2.3%** | **Netherlands 2.3%** | **Netherlands 2.3%** |
| BE Semiconductor Industries NV | &nbsp;&nbsp; 79720 | &nbsp;&nbsp; 17075535 |
| **New Zealand 2.3%** | **New Zealand 2.3%** | **New Zealand 2.3%** |
| Fisher & Paykel Healthcare Corp., Ltd. | &nbsp;&nbsp; 819257 | &nbsp;&nbsp; 17764346 |
| **Sweden 2.9%** | **Sweden 2.9%** | **Sweden 2.9%** |
| AddTech AB, B Shares | &nbsp;&nbsp; 315479 | &nbsp;&nbsp; 10825644 |
| Hexagon AB, Class B | &nbsp;&nbsp; 1133858 | &nbsp;&nbsp; 11034839 |
| **Total** | **Total** | &nbsp;&nbsp; **21860483** |
| **Switzerland 5.7%** | **Switzerland 5.7%** | **Switzerland 5.7%** |
| Belimo Holding AG, Registered Shares | &nbsp;&nbsp; 10342 | &nbsp;&nbsp; 8399243 |
| Inficon Holding AG, Registered Shares | &nbsp;&nbsp; 60601 | &nbsp;&nbsp; 7669748 |
| Kardex Holding AG | &nbsp;&nbsp; 24629 | &nbsp;&nbsp; 7410232 |
| SGS SA, Registered Shares | &nbsp;&nbsp; 72936 | &nbsp;&nbsp; 7686652 |
| VAT Group AG | &nbsp;&nbsp; 19160 | &nbsp;&nbsp; 11952808 |
| **Total** | **Total** | &nbsp;&nbsp; **43118683** |
| **United Kingdom 11.9%** | **United Kingdom 11.9%** | **United Kingdom 11.9%** |
| Babcock International Group PLC | &nbsp;&nbsp; 1053570 | &nbsp;&nbsp; 16356265 |
| Baltic Classifieds Group PLC | &nbsp;&nbsp; 2200698 | &nbsp;&nbsp; 5330504 |
| ConvaTec Group PLC | &nbsp;&nbsp; 3120353 | &nbsp;&nbsp; 9000465 |
| Endeavour Mining PLC | &nbsp;&nbsp; 246358 | &nbsp;&nbsp; 14843017 |

---

---

| | | |
|:---|:---|:---|
| **Common Stocks (continued)** | **Common Stocks (continued)** | **Common Stocks (continued)** |
| **Issuer** | **Shares** | **Value ($)** |
| Halma PLC | &nbsp;&nbsp; 409137 | &nbsp;&nbsp; 20878575 |
| ICG PLC | &nbsp;&nbsp; 465471 | &nbsp;&nbsp; 9546474 |
| Rightmove PLC | &nbsp;&nbsp; 754204 | &nbsp;&nbsp; 4315039 |
| Safestore Holdings PLC | &nbsp;&nbsp; 1099285 | &nbsp;&nbsp; 9232062 |
| **Total** | **Total** | &nbsp;&nbsp; **89502401** |
| **United States 4.7%** | **United States 4.7%** | **United States 4.7%** |
| CRH PLC | &nbsp;&nbsp; 138047 | &nbsp;&nbsp; 14442549 |
| Interparfums, Inc. | &nbsp;&nbsp; 93939 | &nbsp;&nbsp; 8533419 |
| Sunbelt Rentals Holdings, Inc. | &nbsp;&nbsp; 201715 | &nbsp;&nbsp; 12867673 |
| **Total** | **Total** | &nbsp;&nbsp; **35843641** |
| &nbsp;&nbsp; Total Common Stocks <br>(Cost $590,592,640) | &nbsp;&nbsp; Total Common Stocks <br>(Cost $590,592,640) | &nbsp;&nbsp; **743396315** |
| **Money Market Funds 0.8%** | **Money Market Funds 0.8%** | **Money Market Funds 0.8%** |
|  | **Shares** | **Value ($)** |
| Columbia Short-Term Cash Fund, 3.790%<sup>(b),(c)</sup> <br>| &nbsp;&nbsp; 5931736 | &nbsp;&nbsp; 5929363 |
| &nbsp;&nbsp; Total Money Market Funds <br>(Cost $5,929,711) | &nbsp;&nbsp; Total Money Market Funds <br>(Cost $5,929,711) | &nbsp;&nbsp; **5929363** |
| **Total Investments in Securities** <br>**(Cost $596,522,351)** | **Total Investments in Securities** <br>**(Cost $596,522,351)** | &nbsp;&nbsp; **749325678** |
| **Other Assets & Liabilities, Net** |  | &nbsp;&nbsp; **5326459** |
| **Net Assets** | **Net Assets** | &nbsp;&nbsp; **$754652137** |

---

**Notes to Portfolio of Investments** 

&nbsp;&nbsp;&nbsp;&nbsp;(a) Non-income producing investment.

&nbsp;&nbsp;&nbsp;&nbsp;(b) The rate shown is the seven-day current annualized yield at March 31, 2026.

&nbsp;&nbsp;&nbsp;&nbsp;(c) Under the Investment Company Act of 1940, an affiliated company is one in which the Fund owns 5% or more of the company's outstanding voting securities, or a company which is under common ownership or control with the Fund. The value of the
 holdings and transactions in these affiliated companies during the period ended March 31, 2026 are as follows:

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;

---

| | | | | | | | | |
|:---|:---|:---|:---|:---|:---|:---|:---|:---|
| **Affiliated issuers** | **Beginning** <br>**of period($)**<br>| **Purchases($)** | **Sales($)** | **Net change in** <br>**unrealized** <br>**appreciation** <br>**(depreciation)($)**<br>| **End of** <br>**period($)**<br>| **Realized gain** <br>**(loss)($)**<br>| **Dividends($)** | **End of** <br>**period shares**<br>|
| Columbia Short-Term Cash Fund, 3.790% | Columbia Short-Term Cash Fund, 3.790% | Columbia Short-Term Cash Fund, 3.790% | Columbia Short-Term Cash Fund, 3.790% | Columbia Short-Term Cash Fund, 3.790% | Columbia Short-Term Cash Fund, 3.790% | Columbia Short-Term Cash Fund, 3.790% | Columbia Short-Term Cash Fund, 3.790% | Columbia Short-Term Cash Fund, 3.790% |
|  | 4175673 | &nbsp;&nbsp; 71937529 | &nbsp;&nbsp; (70183315)<br>| &nbsp;&nbsp; (524)<br>| &nbsp;&nbsp; 5929363 | &nbsp;&nbsp; (680)<br>| &nbsp;&nbsp; 74853 | &nbsp;&nbsp; 5931736 |

---

Investments are valued using policies described in the Notes to Financial Statements included within the most recent financial statements and additional information.

Columbia Acorn International<sup>®</sup> \| 2026

------

Portfolio of Investments

Columbia Acorn International Select<sup>SM</sup>, March 31, 2026 (Unaudited)

(Percentages represent value of investments compared to net assets)

**Investments in securities**

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;

---

| | | |
|:---|:---|:---|
| **Common Stocks 96.9%** | **Common Stocks 96.9%** | **Common Stocks 96.9%** |
| **Issuer** | **Shares** | **Value ($)** |
| **Australia 1.3%** | **Australia 1.3%** | **Australia 1.3%** |
| ALS Ltd. | &nbsp;&nbsp; 157176 | &nbsp;&nbsp; 2307280 |
| **Belgium 1.2%** | **Belgium 1.2%** | **Belgium 1.2%** |
| Anheuser-Busch InBev SA/NV | &nbsp;&nbsp; 32826 | &nbsp;&nbsp; 2271103 |
| **Canada 1.4%** | **Canada 1.4%** | **Canada 1.4%** |
| Alimentation Couche-Tard, Inc. | &nbsp;&nbsp; 32122 | &nbsp;&nbsp; 1820731 |
| Shopify, Inc., Class A<sup>(a)</sup> <br>| &nbsp;&nbsp; 5650 | &nbsp;&nbsp; 670397 |
| **Total** | **Total** | &nbsp;&nbsp; **2491128** |
| **Denmark 2.7%** | **Denmark 2.7%** | **Denmark 2.7%** |
| FLSmidth & Co. A/S | &nbsp;&nbsp; 20204 | &nbsp;&nbsp; 1530584 |
| Novo Nordisk A/S, Class B | &nbsp;&nbsp; 92938 | &nbsp;&nbsp; 3401019 |
| **Total** | **Total** | &nbsp;&nbsp; **4931603** |
| **Finland 0.7%** | **Finland 0.7%** | **Finland 0.7%** |
| Konecranes OYJ | &nbsp;&nbsp; 41950 | &nbsp;&nbsp; 1376829 |
| **France 14.8%** | **France 14.8%** | **France 14.8%** |
| Airbus Group SE | &nbsp;&nbsp; 29167 | &nbsp;&nbsp; 5514691 |
| Cie de Saint-Gobain SA | &nbsp;&nbsp; 36439 | &nbsp;&nbsp; 3016947 |
| EssilorLuxottica SA | &nbsp;&nbsp; 15082 | &nbsp;&nbsp; 3514485 |
| LVMH Moet Hennessy Louis Vuitton SE | &nbsp;&nbsp; 8139 | &nbsp;&nbsp; 4449181 |
| Publicis Groupe SA | &nbsp;&nbsp; 26316 | &nbsp;&nbsp; 2178162 |
| Schneider Electric SE | &nbsp;&nbsp; 20193 | &nbsp;&nbsp; 5500202 |
| TotalEnergies SE | &nbsp;&nbsp; 32861 | &nbsp;&nbsp; 3015790 |
| **Total** | **Total** | &nbsp;&nbsp; **27189458** |
| **Germany 6.2%** | **Germany 6.2%** | **Germany 6.2%** |
| Adidas AG | &nbsp;&nbsp; 15472 | &nbsp;&nbsp; 2504247 |
| Deutsche Telekom AG, Registered Shares | &nbsp;&nbsp; 123264 | &nbsp;&nbsp; 4600615 |
| Nemetschek SE | &nbsp;&nbsp; 25067 | &nbsp;&nbsp; 1876516 |
| Renk Group AG | &nbsp;&nbsp; 41899 | &nbsp;&nbsp; 2504374 |
| **Total** | **Total** | &nbsp;&nbsp; **11485752** |
| **Ireland 2.3%** | **Ireland 2.3%** | **Ireland 2.3%** |
| Bank of Ireland Group PLC | &nbsp;&nbsp; 236857 | &nbsp;&nbsp; 4297354 |
| **Italy 2.4%** | **Italy 2.4%** | **Italy 2.4%** |
| Prysmian SpA | &nbsp;&nbsp; 36742 | &nbsp;&nbsp; 4338903 |

---

---

| | | |
|:---|:---|:---|
| **Common Stocks (continued)** | **Common Stocks (continued)** | **Common Stocks (continued)** |
| **Issuer** | **Shares** | **Value ($)** |
| **Japan 25.1%** | **Japan 25.1%** | **Japan 25.1%** |
| Asics Corp. | &nbsp;&nbsp; 83300 | &nbsp;&nbsp; 2239530 |
| BayCurrent, Inc. | &nbsp;&nbsp; 26300 | &nbsp;&nbsp; 761289 |
| Capcom Co., Ltd. | &nbsp;&nbsp; 212900 | &nbsp;&nbsp; 4498988 |
| Disco Corp. | &nbsp;&nbsp; 9300 | &nbsp;&nbsp; 3790525 |
| Gunma Bank Ltd. (The) | &nbsp;&nbsp; 168500 | &nbsp;&nbsp; 2245601 |
| Kokusai Electric Corp. | &nbsp;&nbsp; 76800 | &nbsp;&nbsp; 2596969 |
| MatsukiyoCocokara & Co. | &nbsp;&nbsp; 129100 | &nbsp;&nbsp; 2054797 |
| Niterra Co., Ltd. | &nbsp;&nbsp; 76900 | &nbsp;&nbsp; 3625956 |
| Nomura Real Estate Holdings, Inc. | &nbsp;&nbsp; 322000 | &nbsp;&nbsp; 2087778 |
| Omron Corp. | &nbsp;&nbsp; 98800 | &nbsp;&nbsp; 2842386 |
| Recruit Holdings Co., Ltd. | &nbsp;&nbsp; 59500 | &nbsp;&nbsp; 2592413 |
| Sekisui Chemical Co., Ltd. | &nbsp;&nbsp; 113400 | &nbsp;&nbsp; 1903835 |
| Shimadzu Corp. | &nbsp;&nbsp; 106600 | &nbsp;&nbsp; 2533121 |
| Suntory Beverage & Food Ltd. | &nbsp;&nbsp; 98100 | &nbsp;&nbsp; 2770354 |
| Taisei Corp. | &nbsp;&nbsp; 49800 | &nbsp;&nbsp; 5159367 |
| Tokyo Electron Ltd. | &nbsp;&nbsp; 18400 | &nbsp;&nbsp; 4571497 |
| **Total** | **Total** | &nbsp;&nbsp; **46274406** |
| **Netherlands 4.8%** | **Netherlands 4.8%** | **Netherlands 4.8%** |
| ASML Holding NV | &nbsp;&nbsp; 6671 | &nbsp;&nbsp; 8870807 |
| **New Zealand 1.1%** | **New Zealand 1.1%** | **New Zealand 1.1%** |
| Fisher & Paykel Healthcare Corp., Ltd. | &nbsp;&nbsp; 89689 | &nbsp;&nbsp; 1944770 |
| **Spain 2.6%** | **Spain 2.6%** | **Spain 2.6%** |
| Industria de Diseno Textil SA | &nbsp;&nbsp; 83602 | &nbsp;&nbsp; 4866371 |
| **Switzerland 8.0%** | **Switzerland 8.0%** | **Switzerland 8.0%** |
| Belimo Holding AG, Registered Shares | &nbsp;&nbsp; 1722 | &nbsp;&nbsp; 1398520 |
| &nbsp;&nbsp; Cie Financiere Richemont SA, Class A, Registered <br> Shares<br>| &nbsp;&nbsp; 7593 | &nbsp;&nbsp; 1340667 |
| Lonza Group AG, Registered Shares | &nbsp;&nbsp; 6512 | &nbsp;&nbsp; 4177569 |
| Nestlé SA, Registered Shares | &nbsp;&nbsp; 36109 | &nbsp;&nbsp; 3541970 |
| SGS SA, Registered Shares | &nbsp;&nbsp; 17926 | &nbsp;&nbsp; 1889203 |
| VAT Group AG | &nbsp;&nbsp; 3930 | &nbsp;&nbsp; 2451698 |
| **Total** | **Total** | &nbsp;&nbsp; **14799627** |

---

Columbia Acorn International Select<sup>SM</sup> \| 2026

------

Portfolio of Investments (continued)

Columbia Acorn International Select<sup>SM</sup>, March 31, 2026 (Unaudited)

---

| | | |
|:---|:---|:---|
| **Common Stocks (continued)** | **Common Stocks (continued)** | **Common Stocks (continued)** |
| **Issuer** | **Shares** | **Value ($)** |
| **United Kingdom 18.7%** | **United Kingdom 18.7%** | **United Kingdom 18.7%** |
| 3i Group PLC | &nbsp;&nbsp; 92270 | &nbsp;&nbsp; 3007172 |
| Babcock International Group PLC | &nbsp;&nbsp; 195921 | &nbsp;&nbsp; 3041597 |
| BT Group PLC | &nbsp;&nbsp; 1857140 | &nbsp;&nbsp; 5204759 |
| ConvaTec Group PLC | &nbsp;&nbsp; 665130 | &nbsp;&nbsp; 1918526 |
| Endeavour Mining PLC | &nbsp;&nbsp; 45050 | &nbsp;&nbsp; 2714253 |
| GSK PLC | &nbsp;&nbsp; 70565 | &nbsp;&nbsp; 1943747 |
| Halma PLC | &nbsp;&nbsp; 44904 | &nbsp;&nbsp; 2291486 |
| ICG PLC | &nbsp;&nbsp; 104163 | &nbsp;&nbsp; 2136308 |
| London Stock Exchange Group PLC | &nbsp;&nbsp; 17675 | &nbsp;&nbsp; 2087201 |
| Reckitt Benckiser Group PLC | &nbsp;&nbsp; 42587 | &nbsp;&nbsp; 2863564 |
| Rightmove PLC | &nbsp;&nbsp; 190972 | &nbsp;&nbsp; 1092611 |
| Rio Tinto PLC | &nbsp;&nbsp; 23486 | &nbsp;&nbsp; 2178884 |
| Standard Chartered PLC | &nbsp;&nbsp; 194338 | &nbsp;&nbsp; 4049975 |
| **Total** | **Total** | &nbsp;&nbsp; **34530083** |

---

---

| | | |
|:---|:---|:---|
| **Common Stocks (continued)** | **Common Stocks (continued)** | **Common Stocks (continued)** |
| **Issuer** | **Shares** | **Value ($)** |
| **United States 3.6%** | **United States 3.6%** | **United States 3.6%** |
| CRH PLC | &nbsp;&nbsp; 31618 | &nbsp;&nbsp; 3307891 |
| Sunbelt Rentals Holdings, Inc. | &nbsp;&nbsp; 52488 | &nbsp;&nbsp; 3348281 |
| **Total** | **Total** | &nbsp;&nbsp; **6656172** |
| &nbsp;&nbsp; Total Common Stocks <br>(Cost $151,714,694) | &nbsp;&nbsp; Total Common Stocks <br>(Cost $151,714,694) | &nbsp;&nbsp; **178631646** |
| **Money Market Funds 2.3%** | **Money Market Funds 2.3%** | **Money Market Funds 2.3%** |
|  | **Shares** | **Value ($)** |
| Columbia Short-Term Cash Fund, 3.790%<sup>(b),(c)</sup> <br>| &nbsp;&nbsp; 4185522 | &nbsp;&nbsp; 4183848 |
| &nbsp;&nbsp; Total Money Market Funds <br>(Cost $4,184,157) | &nbsp;&nbsp; Total Money Market Funds <br>(Cost $4,184,157) | &nbsp;&nbsp; **4183848** |
| **Total Investments in Securities** <br>**(Cost $155,898,851)** | **Total Investments in Securities** <br>**(Cost $155,898,851)** | &nbsp;&nbsp; **182815494** |
| **Other Assets & Liabilities, Net** |  | &nbsp;&nbsp; **1459848** |
| **Net Assets** | **Net Assets** | &nbsp;&nbsp; **$184275342** |

---

**Notes to Portfolio of Investments** 

&nbsp;&nbsp;&nbsp;&nbsp;(a) Non-income producing investment.

&nbsp;&nbsp;&nbsp;&nbsp;(b) The rate shown is the seven-day current annualized yield at March 31, 2026.

&nbsp;&nbsp;&nbsp;&nbsp;(c) Under the Investment Company Act of 1940, an affiliated company is one in which the Fund owns 5% or more of the company's outstanding voting securities, or a company which is under common ownership or control with the Fund. The value of the
 holdings and transactions in these affiliated companies during the period ended March 31, 2026 are as follows:

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;

---

| | | | | | | | | |
|:---|:---|:---|:---|:---|:---|:---|:---|:---|
| **Affiliated issuers** | **Beginning** <br>**of period($)**<br>| **Purchases($)** | **Sales($)** | **Net change in** <br>**unrealized** <br>**appreciation** <br>**(depreciation)($)**<br>| **End of** <br>**period($)**<br>| **Realized gain** <br>**(loss)($)**<br>| **Dividends($)** | **End of** <br>**period shares**<br>|
| Columbia Short-Term Cash Fund, 3.790% | Columbia Short-Term Cash Fund, 3.790% | Columbia Short-Term Cash Fund, 3.790% | Columbia Short-Term Cash Fund, 3.790% | Columbia Short-Term Cash Fund, 3.790% | Columbia Short-Term Cash Fund, 3.790% | Columbia Short-Term Cash Fund, 3.790% | Columbia Short-Term Cash Fund, 3.790% | Columbia Short-Term Cash Fund, 3.790% |
|  | 2432784 | &nbsp;&nbsp; 17846807 | &nbsp;&nbsp; (16095404)<br>| &nbsp;&nbsp; (339)<br>| &nbsp;&nbsp; 4183848 | &nbsp;&nbsp; 556 | &nbsp;&nbsp; 25596 | &nbsp;&nbsp; 4185522 |

---

Investments are valued using policies described in the Notes to Financial Statements included within the most recent financial statements and additional information.

Columbia Acorn International Select<sup>SM</sup> \| 2026

------

Portfolio of Investments

Columbia Thermostat Fund<sup>SM</sup>, March 31, 2026 (Unaudited)

(Percentages represent value of investments compared to net assets)

**Investments in securities**

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;

---

| | | |
|:---|:---|:---|
| **Equity Funds 27.9%** | **Equity Funds 27.9%** | **Equity Funds 27.9%** |
|  | **Shares** | **Value ($)** |
| **U.S. Large Cap 27.9%** | **U.S. Large Cap 27.9%** | **U.S. Large Cap 27.9%** |
| &nbsp;&nbsp; Columbia Contrarian Core Fund, Institutional 3 <br> Class<sup>(a)</sup> <br>| &nbsp;&nbsp; 2907531 | &nbsp;&nbsp; 109672067 |
| &nbsp;&nbsp; Columbia Cornerstone Growth Fund, Institutional <br> 3 Class<sup>(a),(b)</sup> <br>| &nbsp;&nbsp; 587851 | &nbsp;&nbsp; 44094728 |
| &nbsp;&nbsp; Columbia Large Cap Enhanced Core Fund, <br> Institutional 3 Class<sup>(a)</sup> <br>| &nbsp;&nbsp; 4075657 | &nbsp;&nbsp; 109961225 |
| &nbsp;&nbsp; Columbia Large Cap Index Fund, Institutional 3 <br> Class<sup>(a)</sup> <br>| &nbsp;&nbsp; 1766694 | &nbsp;&nbsp; 87822376 |
| **Total** | **Total** | &nbsp;&nbsp; **351550396** |
| &nbsp;&nbsp; Total Equity Funds <br>(Cost $316,007,299) | &nbsp;&nbsp; Total Equity Funds <br>(Cost $316,007,299) | &nbsp;&nbsp; **351550396** |
| **Exchange-Traded Equity Funds 7.0%** | **Exchange-Traded Equity Funds 7.0%** | **Exchange-Traded Equity Funds 7.0%** |
| **U.S. Large Cap 7.0%** | **U.S. Large Cap 7.0%** | **U.S. Large Cap 7.0%** |
| Columbia Research Enhanced Core ETF<sup>(a)</sup> <br>| &nbsp;&nbsp; 2245815 | &nbsp;&nbsp; 87541869 |
| &nbsp;&nbsp; Total Exchange-Traded Equity Funds <br>(Cost $72,933,543) | &nbsp;&nbsp; Total Exchange-Traded Equity Funds <br>(Cost $72,933,543) | &nbsp;&nbsp; **87541869** |
| **Exchange-Traded Fixed Income Funds 6.4%** | **Exchange-Traded Fixed Income Funds 6.4%** | **Exchange-Traded Fixed Income Funds 6.4%** |
| **Multisector 6.4%** | **Multisector 6.4%** | **Multisector 6.4%** |
| &nbsp;&nbsp; Columbia Diversified Fixed Income Allocation <br> ETF<sup>(a)</sup> <br>| &nbsp;&nbsp; 4487194 | &nbsp;&nbsp; 81128467 |
| &nbsp;&nbsp; Total Exchange-Traded Fixed Income Funds <br>(Cost $81,418,234) | &nbsp;&nbsp; Total Exchange-Traded Fixed Income Funds <br>(Cost $81,418,234) | &nbsp;&nbsp; **81128467** |

---

---

| | | |
|:---|:---|:---|
| **Fixed Income Funds 58.2%** | **Fixed Income Funds 58.2%** | **Fixed Income Funds 58.2%** |
|  | **Shares** | **Value ($)** |
| **High Yield 6.5%** | **High Yield 6.5%** | **High Yield 6.5%** |
| &nbsp;&nbsp; Columbia High Yield Bond Fund, Institutional 3 <br> Class<sup>(a)</sup> <br>| &nbsp;&nbsp; 7397286 | &nbsp;&nbsp; 81296177 |
| **Investment Grade 51.7%** | **Investment Grade 51.7%** | **Investment Grade 51.7%** |
| &nbsp;&nbsp; Columbia Quality Income Fund, Institutional 3 <br> Class<sup>(a)</sup> <br>| &nbsp;&nbsp; 6760368 | &nbsp;&nbsp; 122633072 |
| &nbsp;&nbsp; Columbia Select Corporate Income Fund, <br> Institutional 3 Class<sup>(a)</sup> <br>| &nbsp;&nbsp; 17866160 | &nbsp;&nbsp; 163118039 |
| &nbsp;&nbsp; Columbia Total Return Bond Fund, Institutional 3 <br> Class<sup>(a)</sup> <br>| &nbsp;&nbsp; 6667403 | &nbsp;&nbsp; 203822495 |
| &nbsp;&nbsp; Columbia U.S. Treasury Index Fund, Institutional <br> 3 Class<sup>(a)</sup> <br>| &nbsp;&nbsp; 16372094 | &nbsp;&nbsp; 162902339 |
| **Total** | **Total** | &nbsp;&nbsp; **652475945** |
| &nbsp;&nbsp; Total Fixed Income Funds <br>(Cost $716,854,863) | &nbsp;&nbsp; Total Fixed Income Funds <br>(Cost $716,854,863) | &nbsp;&nbsp; **733772122** |
| **Money Market Funds 0.5%** | **Money Market Funds 0.5%** | **Money Market Funds 0.5%** |
| Columbia Short-Term Cash Fund, 3.790%<sup>(a),(c)</sup> <br>| &nbsp;&nbsp; 6775013 | &nbsp;&nbsp; 6772303 |
| &nbsp;&nbsp; Total Money Market Funds <br>(Cost $6,772,408) | &nbsp;&nbsp; Total Money Market Funds <br>(Cost $6,772,408) | &nbsp;&nbsp; **6772303** |
| **Total Investments in Securities** <br>**(Cost: $1,193,986,347)** | **Total Investments in Securities** <br>**(Cost: $1,193,986,347)** | &nbsp;&nbsp; **1260765157** |
| **Other Assets & Liabilities, Net** |  | &nbsp;&nbsp; **500789** |
| **Net Assets** | **Net Assets** | &nbsp;&nbsp; **1261265946** |

---

**Notes to Portfolio of Investments** 

&nbsp;&nbsp;&nbsp;&nbsp;(a) Under the Investment Company Act of 1940, an affiliated company is one in which the Fund owns 5% or more of the company's outstanding voting securities, or a company which is under common ownership or control with the Fund. The value of the
 holdings and transactions in these affiliated companies during the period ended March 31, 2026 are as follows:

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;

---

| | | | | | | | | |
|:---|:---|:---|:---|:---|:---|:---|:---|:---|
| **Affiliated issuers** | **Beginning** <br>**of period($)**<br>| **Purchases($)** | **Sales($)** | **Net change in** <br>**unrealized** <br>**appreciation** <br>**(depreciation)($)**<br>| **End of** <br>**period($)**<br>| **Realized gain** <br>**(loss)($)**<br>| **Dividends($)** | **End of** <br>**period shares**<br>|
| Columbia Contrarian Core Fund, Institutional 3 Class | Columbia Contrarian Core Fund, Institutional 3 Class | Columbia Contrarian Core Fund, Institutional 3 Class | Columbia Contrarian Core Fund, Institutional 3 Class | Columbia Contrarian Core Fund, Institutional 3 Class | Columbia Contrarian Core Fund, Institutional 3 Class | Columbia Contrarian Core Fund, Institutional 3 Class | Columbia Contrarian Core Fund, Institutional 3 Class | Columbia Contrarian Core Fund, Institutional 3 Class |
|  | 97651520 | &nbsp;&nbsp; 34960524 | &nbsp;&nbsp; (18080618)<br>| &nbsp;&nbsp; (4859359)<br>| &nbsp;&nbsp; 109672067 | &nbsp;&nbsp; (62084)<br>| &nbsp;&nbsp; — | &nbsp;&nbsp; 2907531 |
| Columbia Cornerstone Growth Fund, Institutional 3 Class | Columbia Cornerstone Growth Fund, Institutional 3 Class | Columbia Cornerstone Growth Fund, Institutional 3 Class | Columbia Cornerstone Growth Fund, Institutional 3 Class | Columbia Cornerstone Growth Fund, Institutional 3 Class | Columbia Cornerstone Growth Fund, Institutional 3 Class | Columbia Cornerstone Growth Fund, Institutional 3 Class | Columbia Cornerstone Growth Fund, Institutional 3 Class | Columbia Cornerstone Growth Fund, Institutional 3 Class |
|  | 39255313 | &nbsp;&nbsp; 15261770 | &nbsp;&nbsp; (7162411)<br>| &nbsp;&nbsp; (3259944)<br>| &nbsp;&nbsp; 44094728 | &nbsp;&nbsp; (172970)<br>| &nbsp;&nbsp; — | &nbsp;&nbsp; 587851 |
| Columbia Diversified Fixed Income Allocation ETF | Columbia Diversified Fixed Income Allocation ETF | Columbia Diversified Fixed Income Allocation ETF | Columbia Diversified Fixed Income Allocation ETF | Columbia Diversified Fixed Income Allocation ETF | Columbia Diversified Fixed Income Allocation ETF | Columbia Diversified Fixed Income Allocation ETF | Columbia Diversified Fixed Income Allocation ETF | Columbia Diversified Fixed Income Allocation ETF |
|  | 89709310 | &nbsp;&nbsp; 6997689 | &nbsp;&nbsp; (14404920)<br>| &nbsp;&nbsp; (1173612)<br>| &nbsp;&nbsp; 81128467 | &nbsp;&nbsp; (283664)<br>| &nbsp;&nbsp; 799536 | &nbsp;&nbsp; 4487194 |
| Columbia High Yield Bond Fund, Institutional 3 Class | Columbia High Yield Bond Fund, Institutional 3 Class | Columbia High Yield Bond Fund, Institutional 3 Class | Columbia High Yield Bond Fund, Institutional 3 Class | Columbia High Yield Bond Fund, Institutional 3 Class | Columbia High Yield Bond Fund, Institutional 3 Class | Columbia High Yield Bond Fund, Institutional 3 Class | Columbia High Yield Bond Fund, Institutional 3 Class | Columbia High Yield Bond Fund, Institutional 3 Class |
|  | 90648928 | &nbsp;&nbsp; 7239284 | &nbsp;&nbsp; (15215546)<br>| &nbsp;&nbsp; (1376489)<br>| &nbsp;&nbsp; 81296177 | &nbsp;&nbsp; (269067)<br>| &nbsp;&nbsp; 1436032 | &nbsp;&nbsp; 7397286 |

---

Columbia Thermostat Fund<sup>SM</sup> \| 2026

------

Portfolio of Investments (continued)

Columbia Thermostat Fund<sup>SM</sup>, March 31, 2026 (Unaudited)

**Notes to Portfolio of Investments (continued)**

---

| | | | | | | | | |
|:---|:---|:---|:---|:---|:---|:---|:---|:---|
| **Affiliated issuers** | **Beginning**<br> **of period($)**<br>| **Purchases($)** | **Sales($)** | **Net change in** <br> **unrealized** <br> **appreciation** <br> **(depreciation)($)**<br>| **End of** <br> **period($)**<br>| **Realized gain**<br> **(loss)($)**<br>| **Dividends($)** | **End of**<br> **period shares**<br>|
| Columbia Large Cap Enhanced Core Fund, Institutional 3 Class | Columbia Large Cap Enhanced Core Fund, Institutional 3 Class | Columbia Large Cap Enhanced Core Fund, Institutional 3 Class | Columbia Large Cap Enhanced Core Fund, Institutional 3 Class | Columbia Large Cap Enhanced Core Fund, Institutional 3 Class | Columbia Large Cap Enhanced Core Fund, Institutional 3 Class | Columbia Large Cap Enhanced Core Fund, Institutional 3 Class | Columbia Large Cap Enhanced Core Fund, Institutional 3 Class | Columbia Large Cap Enhanced Core Fund, Institutional 3 Class |
|  | 97597120 | &nbsp;&nbsp; 35228683 | &nbsp;&nbsp; (18412492)<br>| &nbsp;&nbsp; (4452086)<br>| &nbsp;&nbsp; 109961225 | &nbsp;&nbsp; (114020)<br>| &nbsp;&nbsp; — | &nbsp;&nbsp; 4075657 |
| Columbia Large Cap Index Fund, Institutional 3 Class | Columbia Large Cap Index Fund, Institutional 3 Class | Columbia Large Cap Index Fund, Institutional 3 Class | Columbia Large Cap Index Fund, Institutional 3 Class | Columbia Large Cap Index Fund, Institutional 3 Class | Columbia Large Cap Index Fund, Institutional 3 Class | Columbia Large Cap Index Fund, Institutional 3 Class | Columbia Large Cap Index Fund, Institutional 3 Class | Columbia Large Cap Index Fund, Institutional 3 Class |
|  | 77979626 | &nbsp;&nbsp; 27819515 | &nbsp;&nbsp; (14996151)<br>| &nbsp;&nbsp; (2980614)<br>| &nbsp;&nbsp; 87822376 | &nbsp;&nbsp; (62135)<br>| &nbsp;&nbsp; — | &nbsp;&nbsp; 1766694 |
| Columbia Quality Income Fund, Institutional 3 Class | Columbia Quality Income Fund, Institutional 3 Class | Columbia Quality Income Fund, Institutional 3 Class | Columbia Quality Income Fund, Institutional 3 Class | Columbia Quality Income Fund, Institutional 3 Class | Columbia Quality Income Fund, Institutional 3 Class | Columbia Quality Income Fund, Institutional 3 Class | Columbia Quality Income Fund, Institutional 3 Class | Columbia Quality Income Fund, Institutional 3 Class |
|  | 134926489 | &nbsp;&nbsp; 11986143 | &nbsp;&nbsp; (23356286)<br>| &nbsp;&nbsp; (923274)<br>| &nbsp;&nbsp; 122633072 | &nbsp;&nbsp; 64440 | &nbsp;&nbsp; 1452469 | &nbsp;&nbsp; 6760368 |
| Columbia Research Enhanced Core ETF | Columbia Research Enhanced Core ETF | Columbia Research Enhanced Core ETF | Columbia Research Enhanced Core ETF | Columbia Research Enhanced Core ETF | Columbia Research Enhanced Core ETF | Columbia Research Enhanced Core ETF | Columbia Research Enhanced Core ETF | Columbia Research Enhanced Core ETF |
|  | 77584688 | &nbsp;&nbsp; 27385576 | &nbsp;&nbsp; (14150554)<br>| &nbsp;&nbsp; (3277841)<br>| &nbsp;&nbsp; 87541869 | &nbsp;&nbsp; 390611 | &nbsp;&nbsp; — | &nbsp;&nbsp; 2245815 |
| Columbia Select Corporate Income Fund, Institutional 3 Class | Columbia Select Corporate Income Fund, Institutional 3 Class | Columbia Select Corporate Income Fund, Institutional 3 Class | Columbia Select Corporate Income Fund, Institutional 3 Class | Columbia Select Corporate Income Fund, Institutional 3 Class | Columbia Select Corporate Income Fund, Institutional 3 Class | Columbia Select Corporate Income Fund, Institutional 3 Class | Columbia Select Corporate Income Fund, Institutional 3 Class | Columbia Select Corporate Income Fund, Institutional 3 Class |
|  | 180248809 | &nbsp;&nbsp; 15265284 | &nbsp;&nbsp; (31579683)<br>| &nbsp;&nbsp; (816371)<br>| &nbsp;&nbsp; 163118039 | &nbsp;&nbsp; (1748372)<br>| &nbsp;&nbsp; 2155735 | &nbsp;&nbsp; 17866160 |
| Columbia Short-Term Cash Fund, 3.790% | Columbia Short-Term Cash Fund, 3.790% | Columbia Short-Term Cash Fund, 3.790% | Columbia Short-Term Cash Fund, 3.790% | Columbia Short-Term Cash Fund, 3.790% | Columbia Short-Term Cash Fund, 3.790% | Columbia Short-Term Cash Fund, 3.790% | Columbia Short-Term Cash Fund, 3.790% | Columbia Short-Term Cash Fund, 3.790% |
|  | 6220261 | &nbsp;&nbsp; 20997882 | &nbsp;&nbsp; (20445420)<br>| &nbsp;&nbsp; (420)<br>| &nbsp;&nbsp; 6772303 | &nbsp;&nbsp; 50 | &nbsp;&nbsp; 47161 | &nbsp;&nbsp; 6775013 |
| Columbia Total Return Bond Fund, Institutional 3 Class | Columbia Total Return Bond Fund, Institutional 3 Class | Columbia Total Return Bond Fund, Institutional 3 Class | Columbia Total Return Bond Fund, Institutional 3 Class | Columbia Total Return Bond Fund, Institutional 3 Class | Columbia Total Return Bond Fund, Institutional 3 Class | Columbia Total Return Bond Fund, Institutional 3 Class | Columbia Total Return Bond Fund, Institutional 3 Class | Columbia Total Return Bond Fund, Institutional 3 Class |
|  | 225428660 | &nbsp;&nbsp; 19764450 | &nbsp;&nbsp; (38847707)<br>| &nbsp;&nbsp; (2522908)<br>| &nbsp;&nbsp; 203822495 | &nbsp;&nbsp; (104258)<br>| &nbsp;&nbsp; 2741823 | &nbsp;&nbsp; 6667403 |
| Columbia U.S. Treasury Index Fund, Institutional 3 Class | Columbia U.S. Treasury Index Fund, Institutional 3 Class | Columbia U.S. Treasury Index Fund, Institutional 3 Class | Columbia U.S. Treasury Index Fund, Institutional 3 Class | Columbia U.S. Treasury Index Fund, Institutional 3 Class | Columbia U.S. Treasury Index Fund, Institutional 3 Class | Columbia U.S. Treasury Index Fund, Institutional 3 Class | Columbia U.S. Treasury Index Fund, Institutional 3 Class | Columbia U.S. Treasury Index Fund, Institutional 3 Class |
|  | 179934702 | &nbsp;&nbsp; 15661956 | &nbsp;&nbsp; (31152943)<br>| &nbsp;&nbsp; (1541376)<br>| &nbsp;&nbsp; 162902339 | &nbsp;&nbsp; (5300)<br>| &nbsp;&nbsp; 1685211 | &nbsp;&nbsp; 16372094 |
| Total | 1297185426 |  |  | &nbsp;&nbsp; (27184294)<br>| &nbsp;&nbsp; 1260765157 | &nbsp;&nbsp; (2366769)<br>| &nbsp;&nbsp; 10317967 |  |

---

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;

&nbsp;&nbsp;&nbsp;&nbsp;(b) Non-income producing investment.

&nbsp;&nbsp;&nbsp;&nbsp;(c) The rate shown is the seven-day current annualized yield at March 31, 2026.

Investments are valued using policies described in the Notes to Financial Statements included within the most recent financial statements and additional information.

Columbia Thermostat Fund<sup>SM</sup> \| 2026

------

Portfolio of Investments

Columbia Acorn European Fund<sup>SM</sup>, March 31, 2026 (Unaudited)

(Percentages represent value of investments compared to net assets)

**Investments in securities**

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;

---

| | | |
|:---|:---|:---|
| **Common Stocks 98.1%** | **Common Stocks 98.1%** | **Common Stocks 98.1%** |
| **Issuer** | **Shares** | **Value ($)** |
| **Austria 3.0%** | **Austria 3.0%** | **Austria 3.0%** |
| BAWAG Group AG | &nbsp;&nbsp; 1258 | &nbsp;&nbsp; 191251 |
| DO & CO AG | &nbsp;&nbsp; 2492 | &nbsp;&nbsp; 466621 |
| Wienerberger AG | &nbsp;&nbsp; 12494 | &nbsp;&nbsp; 332266 |
| **Total** | **Total** | &nbsp;&nbsp; **990138** |
| **Belgium 1.4%** | **Belgium 1.4%** | **Belgium 1.4%** |
| Cenergy Holdings SA | &nbsp;&nbsp; 8678 | &nbsp;&nbsp; 190872 |
| Warehouses De Pauw CVA | &nbsp;&nbsp; 10879 | &nbsp;&nbsp; 283394 |
| **Total** | **Total** | &nbsp;&nbsp; **474266** |
| **Denmark 2.9%** | **Denmark 2.9%** | **Denmark 2.9%** |
| FLSmidth & Co. A/S | &nbsp;&nbsp; 3250 | &nbsp;&nbsp; 246209 |
| NKT A/S<sup>(a)</sup> <br>| &nbsp;&nbsp; 3759 | &nbsp;&nbsp; 489350 |
| Per Aarsleff Holding A/S | &nbsp;&nbsp; 2044 | &nbsp;&nbsp; 236681 |
| **Total** | **Total** | &nbsp;&nbsp; **972240** |
| **Finland 2.0%** | **Finland 2.0%** | **Finland 2.0%** |
| Cargotec OYJ, Class B | &nbsp;&nbsp; 3490 | &nbsp;&nbsp; 165037 |
| Konecranes OYJ | &nbsp;&nbsp; 9642 | &nbsp;&nbsp; 316457 |
| Valmet OYJ | &nbsp;&nbsp; 6095 | &nbsp;&nbsp; 174400 |
| **Total** | **Total** | &nbsp;&nbsp; **655894** |
| **France 16.2%** | **France 16.2%** | **France 16.2%** |
| Elis SA | &nbsp;&nbsp; 35813 | &nbsp;&nbsp; 1014168 |
| Exosens SAS | &nbsp;&nbsp; 3275 | &nbsp;&nbsp; 235828 |
| Gaztransport Et Technigaz SA | &nbsp;&nbsp; 1653 | &nbsp;&nbsp; 388775 |
| Lisi SA | &nbsp;&nbsp; 6279 | &nbsp;&nbsp; 383915 |
| Nexans SA | &nbsp;&nbsp; 5351 | &nbsp;&nbsp; 727944 |
| SCOR SE | &nbsp;&nbsp; 16193 | &nbsp;&nbsp; 578744 |
| SPIE SA | &nbsp;&nbsp; 14283 | &nbsp;&nbsp; 715230 |
| Technip Energies NV | &nbsp;&nbsp; 16727 | &nbsp;&nbsp; 706842 |
| Vallourec SACA | &nbsp;&nbsp; 7926 | &nbsp;&nbsp; 200636 |
| Virbac SA | &nbsp;&nbsp; 1092 | &nbsp;&nbsp; 451011 |
| **Total** | **Total** | &nbsp;&nbsp; **5403093** |
| **Germany 9.2%** | **Germany 9.2%** | **Germany 9.2%** |
| AlzChem Group AG | &nbsp;&nbsp; 1303 | &nbsp;&nbsp; 260789 |
| Bilfinger SE | &nbsp;&nbsp; 3898 | &nbsp;&nbsp; 451350 |
| CTS Eventim AG & Co. KGaA | &nbsp;&nbsp; 1991 | &nbsp;&nbsp; 116614 |
| DEUTZ AG | &nbsp;&nbsp; 18207 | &nbsp;&nbsp; 183060 |

---

---

| | | |
|:---|:---|:---|
| **Common Stocks (continued)** | **Common Stocks (continued)** | **Common Stocks (continued)** |
| **Issuer** | **Shares** | **Value ($)** |
| flatexDEGIRO AG | &nbsp;&nbsp; 17560 | &nbsp;&nbsp; 605563 |
| JOST Werke AG | &nbsp;&nbsp; 2575 | &nbsp;&nbsp; 149942 |
| Nordex SE<sup>(a)</sup> <br>| &nbsp;&nbsp; 4990 | &nbsp;&nbsp; 270420 |
| PVA TePla AG<sup>(a)</sup> <br>| &nbsp;&nbsp; 4693 | &nbsp;&nbsp; 162411 |
| Renk Group AG | &nbsp;&nbsp; 4562 | &nbsp;&nbsp; 272679 |
| SUSS MicroTec SE | &nbsp;&nbsp; 6973 | &nbsp;&nbsp; 414683 |
| Vincorion SE<sup>(a)</sup> <br>| &nbsp;&nbsp; 9150 | &nbsp;&nbsp; 171649 |
| **Total** | **Total** | &nbsp;&nbsp; **3059160** |
| **Greece 2.5%** | **Greece 2.5%** | **Greece 2.5%** |
| Alpha Bank SA | &nbsp;&nbsp; 108416 | &nbsp;&nbsp; 402150 |
| Piraeus Bank SA<sup>(a)</sup> <br>| &nbsp;&nbsp; 52189 | &nbsp;&nbsp; 428785 |
| **Total** | **Total** | &nbsp;&nbsp; **830935** |
| **Ireland 7.5%** | **Ireland 7.5%** | **Ireland 7.5%** |
| Cairn Homes PLC | &nbsp;&nbsp; 207880 | &nbsp;&nbsp; 511190 |
| Glanbia PLC | &nbsp;&nbsp; 36364 | &nbsp;&nbsp; 712431 |
| Irish Continental Group PLC | &nbsp;&nbsp; 56644 | &nbsp;&nbsp; 415092 |
| Permanent TSB Group Holdings PLC<sup>(a)</sup> <br>| &nbsp;&nbsp; 53289 | &nbsp;&nbsp; 178700 |
| Uniphar PLC | &nbsp;&nbsp; 156292 | &nbsp;&nbsp; 697461 |
| **Total** | **Total** | &nbsp;&nbsp; **2514874** |
| **Italy 5.7%** | **Italy 5.7%** | **Italy 5.7%** |
| Buzzi SpA | &nbsp;&nbsp; 4748 | &nbsp;&nbsp; 240045 |
| Carel Industries SpA | &nbsp;&nbsp; 6596 | &nbsp;&nbsp; 168109 |
| De' Longhi SpA | &nbsp;&nbsp; 10153 | &nbsp;&nbsp; 356829 |
| Hera | &nbsp;&nbsp; 149931 | &nbsp;&nbsp; 691584 |
| Intercos SpA | &nbsp;&nbsp; 13946 | &nbsp;&nbsp; 199881 |
| Reply SpA | &nbsp;&nbsp; 1866 | &nbsp;&nbsp; 175608 |
| Sol Spa | &nbsp;&nbsp; 1220 | &nbsp;&nbsp; 83057 |
| **Total** | **Total** | &nbsp;&nbsp; **1915113** |
| **Luxembourg 0.6%** | **Luxembourg 0.6%** | **Luxembourg 0.6%** |
| Tonies SE, Class A<sup>(a)</sup> <br>| &nbsp;&nbsp; 16151 | &nbsp;&nbsp; 192671 |
| **Netherlands 2.8%** | **Netherlands 2.8%** | **Netherlands 2.8%** |
| CTP NV<sup>(b)</sup> <br>| &nbsp;&nbsp; 30147 | &nbsp;&nbsp; 504555 |
| Van Lanschot Kempen NV | &nbsp;&nbsp; 6287 | &nbsp;&nbsp; 417524 |
| **Total** | **Total** | &nbsp;&nbsp; **922079** |

---

Columbia Acorn European Fund<sup>SM</sup> \| 2026

------

Portfolio of Investments (continued)

Columbia Acorn European Fund<sup>SM</sup>, March 31, 2026 (Unaudited)

---

| | | |
|:---|:---|:---|
| **Common Stocks (continued)** | **Common Stocks (continued)** | **Common Stocks (continued)** |
| **Issuer** | **Shares** | **Value ($)** |
| **Norway 3.1%** | **Norway 3.1%** | **Norway 3.1%** |
| SalMar ASA | &nbsp;&nbsp; 5914 | &nbsp;&nbsp; 345084 |
| Storebrand ASA | &nbsp;&nbsp; 38943 | &nbsp;&nbsp; 702912 |
| **Total** | **Total** | &nbsp;&nbsp; **1047996** |
| **Portugal 1.0%** | **Portugal 1.0%** | **Portugal 1.0%** |
| Galp Energia SGPS SA | &nbsp;&nbsp; 14587 | &nbsp;&nbsp; 349761 |
| **Spain 2.2%** | **Spain 2.2%** | **Spain 2.2%** |
| Fluidra SA | &nbsp;&nbsp; 12694 | &nbsp;&nbsp; 294452 |
| Merlin Properties Socimi SA | &nbsp;&nbsp; 14446 | &nbsp;&nbsp; 235359 |
| Viscofan SA | &nbsp;&nbsp; 2852 | &nbsp;&nbsp; 198596 |
| **Total** | **Total** | &nbsp;&nbsp; **728407** |
| **Sweden 2.6%** | **Sweden 2.6%** | **Sweden 2.6%** |
| Hexpol AB | &nbsp;&nbsp; 22265 | &nbsp;&nbsp; 169841 |
| Nordnet AB | &nbsp;&nbsp; 10816 | &nbsp;&nbsp; 352215 |
| SSAB AB, Class B | &nbsp;&nbsp; 42332 | &nbsp;&nbsp; 333708 |
| **Total** | **Total** | &nbsp;&nbsp; **855764** |
| **Switzerland 5.2%** | **Switzerland 5.2%** | **Switzerland 5.2%** |
| Burckhardt Compression Holding AG | &nbsp;&nbsp; 398 | &nbsp;&nbsp; 238211 |
| Cicor Technologies Ltd.<sup>(a)</sup> <br>| &nbsp;&nbsp; 690 | &nbsp;&nbsp; 102548 |
| Comet Holding AG, Registered Shares | &nbsp;&nbsp; 1047 | &nbsp;&nbsp; 333898 |
| Galenica AG | &nbsp;&nbsp; 2895 | &nbsp;&nbsp; 329590 |
| Huber + Suhner AG, Registered Shares | &nbsp;&nbsp; 1111 | &nbsp;&nbsp; 248161 |
| Kardex Holding AG | &nbsp;&nbsp; 884 | &nbsp;&nbsp; 265973 |
| R&S Group Holding AG<sup>(a)</sup> <br>| &nbsp;&nbsp; 8852 | &nbsp;&nbsp; 229167 |
| **Total** | **Total** | &nbsp;&nbsp; **1747548** |
| **United Kingdom 29.7%** | **United Kingdom 29.7%** | **United Kingdom 29.7%** |
| Ashmore Group PLC | &nbsp;&nbsp; 68281 | &nbsp;&nbsp; 191056 |
| Avon Technologies PLC | &nbsp;&nbsp; 8193 | &nbsp;&nbsp; 179798 |
| Babcock International Group PLC | &nbsp;&nbsp; 24931 | &nbsp;&nbsp; 387044 |
| Breedon Group PLC | &nbsp;&nbsp; 63212 | &nbsp;&nbsp; 249329 |
| Bridgepoint Group Ltd., Registered Shares<sup>(b)</sup> <br>| &nbsp;&nbsp; 61540 | &nbsp;&nbsp; 191741 |
| Capital & Counties Properties PLC | &nbsp;&nbsp; 244237 | &nbsp;&nbsp; 412172 |
| Chemring Group PLC | &nbsp;&nbsp; 66020 | &nbsp;&nbsp; 450132 |
| Clarkson PLC | &nbsp;&nbsp; 4702 | &nbsp;&nbsp; 289201 |
| Cohort PLC | &nbsp;&nbsp; 15558 | &nbsp;&nbsp; 252023 |
| ConvaTec Group PLC | &nbsp;&nbsp; 96569 | &nbsp;&nbsp; 278547 |
| Croda International PLC | &nbsp;&nbsp; 7481 | &nbsp;&nbsp; 280932 |

---

---

| | | |
|:---|:---|:---|
| **Common Stocks (continued)** | **Common Stocks (continued)** | **Common Stocks (continued)** |
| **Issuer** | **Shares** | **Value ($)** |
| CVS Group PLC | &nbsp;&nbsp; 45389 | &nbsp;&nbsp; 678444 |
| discoverIE Group PLC | &nbsp;&nbsp; 27711 | &nbsp;&nbsp; 197329 |
| Endeavour Mining PLC | &nbsp;&nbsp; 3150 | &nbsp;&nbsp; 189787 |
| Genus PLC | &nbsp;&nbsp; 6183 | &nbsp;&nbsp; 196072 |
| ICG PLC | &nbsp;&nbsp; 8273 | &nbsp;&nbsp; 169673 |
| IG Group Holdings PLC | &nbsp;&nbsp; 27224 | &nbsp;&nbsp; 518412 |
| IMI PLC | &nbsp;&nbsp; 9205 | &nbsp;&nbsp; 313145 |
| Keller Group PLC | &nbsp;&nbsp; 8648 | &nbsp;&nbsp; 220002 |
| LondonMetric Property PLC | &nbsp;&nbsp; 244406 | &nbsp;&nbsp; 590386 |
| Moonpig Group PLC | &nbsp;&nbsp; 190740 | &nbsp;&nbsp; 528911 |
| Quilter PLC<sup>(b)</sup> <br>| &nbsp;&nbsp; 342811 | &nbsp;&nbsp; 792238 |
| Rotork PLC | &nbsp;&nbsp; 81821 | &nbsp;&nbsp; 340223 |
| Safestore Holdings PLC | &nbsp;&nbsp; 64016 | &nbsp;&nbsp; 537622 |
| Shawbrook Group PLC<sup>(a),(b)</sup> <br>| &nbsp;&nbsp; 91314 | &nbsp;&nbsp; 386762 |
| SigmaRoc PLC<sup>(a)</sup> <br>| &nbsp;&nbsp; 262016 | &nbsp;&nbsp; 408706 |
| Subsea 7 SA | &nbsp;&nbsp; 13087 | &nbsp;&nbsp; 405419 |
| WPP PLC | &nbsp;&nbsp; 89170 | &nbsp;&nbsp; 278876 |
| **Total** | **Total** | &nbsp;&nbsp; **9913982** |
| **United States 0.5%** | **United States 0.5%** | **United States 0.5%** |
| Boku, Inc.<sup>(a)</sup> <br>| &nbsp;&nbsp; 70611 | &nbsp;&nbsp; 153743 |
| &nbsp;&nbsp; Total Common Stocks <br>(Cost $30,061,070) | &nbsp;&nbsp; Total Common Stocks <br>(Cost $30,061,070) | &nbsp;&nbsp; **32727664** |

---

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;

---

| | | |
|:---|:---|:---|
| **Preferred Stocks 0.5%** | **Preferred Stocks 0.5%** | **Preferred Stocks 0.5%** |
| **Issuer** | **Shares** | **Value ($)** |
| **Germany 0.5%** | **Germany 0.5%** | **Germany 0.5%** |
| KSB SE & Co. KGAA | &nbsp;&nbsp; 164 | &nbsp;&nbsp; 174772 |
| &nbsp;&nbsp; Total Preferred Stocks <br>(Cost $212,981) | &nbsp;&nbsp; Total Preferred Stocks <br>(Cost $212,981) | &nbsp;&nbsp; **174772** |

---

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;

---

| | | |
|:---|:---|:---|
| **Money Market Funds 0.8%** | **Money Market Funds 0.8%** | **Money Market Funds 0.8%** |
|  | **Shares** | **Value ($)** |
| Columbia Short-Term Cash Fund, 3.790%<sup>(c),(d)</sup> <br>| &nbsp;&nbsp; 275393 | &nbsp;&nbsp; 275283 |
| &nbsp;&nbsp; Total Money Market Funds <br>(Cost $275,271) | &nbsp;&nbsp; Total Money Market Funds <br>(Cost $275,271) | &nbsp;&nbsp; **275283** |
| **Total Investments in Securities** <br>**(Cost $30,549,322)** | **Total Investments in Securities** <br>**(Cost $30,549,322)** | &nbsp;&nbsp; **33177719** |
| **Other Assets & Liabilities, Net** |  | &nbsp;&nbsp; **194593** |
| **Net Assets** | **Net Assets** | &nbsp;&nbsp; **$33372312** |

---

Columbia Acorn European Fund<sup>SM</sup> \| 2026

------

Portfolio of Investments (continued)

Columbia Acorn European Fund<sup>SM</sup>, March 31, 2026 (Unaudited)

**Notes to Portfolio of Investments** 

&nbsp;&nbsp;&nbsp;&nbsp;(a) Non-income producing investment.

&nbsp;&nbsp;&nbsp;&nbsp;(b) Represents privately placed and other securities and instruments exempt from Securities
 and Exchange Commission registration (collectively, private placements), such as Section 4(a)(2) and Rule 144A eligible securities, which are often sold only
 to qualified institutional buyers. At March 31, 2026, the total value of these securities amounted to $1,875,296, which represents 5.62% of total net assets.

&nbsp;&nbsp;&nbsp;&nbsp;(c) The rate shown is the seven-day current annualized yield at March 31, 2026.

&nbsp;&nbsp;&nbsp;&nbsp;(d) Under the Investment Company Act of 1940, an affiliated company is one in which the Fund owns 5% or more of the company's outstanding voting securities, or a company which is under common ownership or control with the Fund. The value of the
 holdings and transactions in these affiliated companies during the period ended March 31, 2026 are as follows:

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;

---

| | | | | | | | | |
|:---|:---|:---|:---|:---|:---|:---|:---|:---|
| **Affiliated issuers** | **Beginning** <br>**of period($)**<br>| **Purchases($)** | **Sales($)** | **Net change in** <br>**unrealized** <br>**appreciation** <br>**(depreciation)($)**<br>| **End of** <br>**period($)**<br>| **Realized gain** <br>**(loss)($)**<br>| **Dividends($)** | **End of** <br>**period shares**<br>|
| Columbia Short-Term Cash Fund, 3.790% | Columbia Short-Term Cash Fund, 3.790% | Columbia Short-Term Cash Fund, 3.790% | Columbia Short-Term Cash Fund, 3.790% | Columbia Short-Term Cash Fund, 3.790% | Columbia Short-Term Cash Fund, 3.790% | Columbia Short-Term Cash Fund, 3.790% | Columbia Short-Term Cash Fund, 3.790% | Columbia Short-Term Cash Fund, 3.790% |
|  | 326154 | &nbsp;&nbsp; 3939973 | &nbsp;&nbsp; (3990855)<br>| &nbsp;&nbsp; 11 | &nbsp;&nbsp; 275283 | &nbsp;&nbsp; 6 | &nbsp;&nbsp; 2854 | &nbsp;&nbsp; 275393 |

---

Investments are valued using policies described in the Notes to Financial Statements included within the most recent financial statements and additional information.

Columbia Acorn European Fund<sup>SM</sup> \| 2026

------

[THIS PAGE INTENTIONALLY LEFT BLANK]

------

You may at any time request, free of charge, to receive a paper copy of this report by calling 800.345.6611.

1QT110_(05/26)

------

## 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:** 290 Congress Street

  - **City:** Boston

  - **State:** MA

  - **Foreign country:** US

  - **Zip / Postal Code:** 02210

  - **Telephone number:** 1800-345-6611

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

- **a. Name of Series:** Columbia Acorn International Select

- **b. EDGAR series identifier (if any):** S000009188

- **c. LEI of Series:** 549300KTP8INZROJV026

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

- **a. Date of fiscal year-end:** 2026-12-31

- **b. Date as of which information is reported:** 2026-03-31

**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:** $187552446.79

**Total Liabilities:** $3161859.85

**Net Assets:** $184390586.94

**Cash Not Reported:** $196.76

**Monthly Return Information**

| Class               | Month 1 Return (%)   | Month 2 Return (%)   | Month 3 Return (%)   |
|:---|:---|:---|:---|
| Class ID C000024970 | 3.69%                | 2.48%                | -11.26%              |
| Class ID C000024973 | 3.72%                | 2.52%                | -11.24%              |
| Class ID C000122746 | 3.74%                | 2.49%                | -11.20%              |
| Class ID C000122747 | 3.75%                | 2.53%                | -11.24%              |
| Class ID C000251061 | 3.72%                | 2.52%                | -11.24%              |

**Monthly Gains & Losses**

| Period   | Net Realized Gain/Loss   | Net Unrealized Appreciation/Depreciation   |
|:---|:---|:---|
| Month 1  | $1786711.91              | $5777981.23                                |
| Month 2  | $-668709.53              | $5750172.89                                |
| Month 3  | $363106.88               | $-24465840.98                              |

### 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   |
|:---|:---|:---|:---|:---|:---|:---|---:|:---|:---|:---|:---|:---|:---|:---|---:|:---|
| adidas AG                           | adidas AG                           | CUSIP: 000000000<br>LEI: 549300JSX0Z4CW0V5023 | Long             | EC               | CORP              | DE        |     15472 | NS      | $2504247.42   | 1.36%             |  |  |  | No            |                  2 | On Loan: No      |
| Asics Corp                          | Asics Corp                          | CUSIP: 000000000<br>LEI: 3538002LJMRZ83SU0B85 | Long             | EC               | CORP              | JP        |     83300 | NS      | $2239530.14   | 1.21%             |  |  |  | No            |                  2 | On Loan: No      |
| BT Group PLC                        | BT Group PLC                        | CUSIP: 000000000<br>LEI: 213800LRO7NS5CYQMN21 | Long             | EC               | CORP              | GB        |   1857140 | NS      | $5204758.94   | 2.82%             |  |  |  | No            |                  2 | On Loan: No      |
| Babcock International Group PLC     | Babcock International Group PLC     | CUSIP: 000000000<br>LEI: 213800TSKOLX4EU6L377 | Long             | EC               | CORP              | GB        |    195921 | NS      | $3041597.44   | 1.65%             |  |  |  | No            |                  2 | On Loan: No      |
| ASML Holding NV                     | ASML Holding NV                     | CUSIP: 000000000<br>LEI: 724500Y6DUVHQD6OXN27 | Long             | EC               | CORP              | NL        |      6671 | NS      | $8870806.61   | 4.81%             |  |  |  | No            |                  2 | On Loan: No      |
| Cie de Saint-Gobain SA              | Cie de Saint-Gobain SA              | CUSIP: 000000000<br>LEI: NFONVGN05Z0FMN5PEC35 | Long             | EC               | CORP              | FR        |     36439 | NS      | $3016946.49   | 1.64%             |  |  |  | No            |                  2 | On Loan: No      |
| CRH PLC                             | CRH PLC                             | CUSIP: 000000000<br>LEI: 549300MIDJNNTH068E74 | Long             | EC               | CORP              | IE        |     31618 | NS      | $3307891.50   | 1.79%             |  |  |  | No            |                  2 | On Loan: No      |
| Capcom Co Ltd                       | Capcom Co Ltd                       | CUSIP: 000000000<br>LEI: 529900JJWQKXS3TC8744 | Long             | EC               | CORP              | JP        |    212900 | NS      | $4498987.73   | 2.44%             |  |  |  | No            |                  2 | On Loan: No      |
| Cie Financiere Richemont SA         | Cie Financiere Richemont SA         | CUSIP: 000000000<br>LEI: 549300YIPGJ6UX2QPS51 | Long             | EC               | CORP              | CH        |      7593 | NS      | $1340666.68   | 0.73%             |  |  |  | No            |                  2 | On Loan: No      |
| COLUMBIA SHORT TERM CASH FUND       | COLUMBIA SHORT TERM CASH FUND       | CUSIP: 19766H239<br>LEI: N/A                  | Long             | STIV             | RF                | US        |   4185522 | NS      | $4183847.96   | 2.27%             |  |  |  | No            |                  1 | On Loan: No      |
| Deutsche Telekom AG                 | Deutsche Telekom AG                 | CUSIP: 000000000<br>LEI: 549300V9QSIG4WX4GJ96 | Long             | EC               | CORP              | DE        |    123264 | NS      | $4600615.17   | 2.50%             |  |  |  | No            |                  2 | On Loan: No      |
| Disco Corp                          | Disco Corp                          | CUSIP: 000000000<br>LEI: N/A                  | Long             | EC               | CORP              | JP        |      9300 | NS      | $3790524.79   | 2.06%             |  |  |  | No            |                  2 | On Loan: No      |
| EssilorLuxottica SA                 | EssilorLuxottica SA                 | CUSIP: 000000000<br>LEI: 549300M3VH1A3ER1TB49 | Long             | EC               | CORP              | FR        |     15082 | NS      | $3514484.68   | 1.91%             |  |  |  | No            |                  2 | On Loan: No      |
| Airbus SE                           | Airbus SE                           | CUSIP: 000000000<br>LEI: MINO79WLOO247M1IL051 | Long             | EC               | CORP              | NL        |     29167 | NS      | $5514691.27   | 2.99%             |  |  |  | No            |                  2 | On Loan: No      |
| Fisher & Paykel Healthcare Corp Ltd | Fisher & Paykel Healthcare Corp Ltd | CUSIP: 000000000<br>LEI: N/A                  | Long             | EC               | CORP              | NZ        |     89689 | NS      | $1944769.99   | 1.05%             |  |  |  | No            |                  2 | On Loan: No      |
| FLSmidth & Co A/S                   | FLSmidth & Co A/S                   | CUSIP: 000000000<br>LEI: 213800MXXDGQ3ITPXI41 | Long             | EC               | CORP              | DK        |     20204 | NS      | $1530583.93   | 0.83%             |  |  |  | No            |                  2 | On Loan: No      |
| Gunma Bank Ltd/The                  | Gunma Bank Ltd/The                  | CUSIP: 000000000<br>LEI: 54930054A69VC4I5BP89 | Long             | EC               | CORP              | JP        |    168500 | NS      | $2245601.08   | 1.22%             |  |  |  | No            |                  2 | On Loan: No      |
| Halma PLC                           | Halma PLC                           | CUSIP: 000000000<br>LEI: 2138007FRGLUR9KGBT40 | Long             | EC               | CORP              | GB        |     44904 | NS      | $2291485.55   | 1.24%             |  |  |  | No            |                  2 | On Loan: No      |
| 3i Group PLC                        | 3i Group PLC                        | CUSIP: 000000000<br>LEI: 35GDVHRBMFE7NWATNM84 | Long             | EC               | CORP              | GB        |     92270 | NS      | $3007172.20   | 1.63%             |  |  |  | No            |                  2 | On Loan: No      |
| Industria de Diseno Textil SA       | Industria de Diseno Textil SA       | CUSIP: 000000000<br>LEI: 549300TTCXZOGZM2EY83 | Long             | EC               | CORP              | ES        |     83602 | NS      | $4866371.44   | 2.64%             |  |  |  | No            |                  2 | On Loan: No      |
| Konecranes Oyj                      | Konecranes Oyj                      | CUSIP: 000000000<br>LEI: 549300EF0CDEQZBMA096 | Long             | EC               | CORP              | FI        |     41950 | NS      | $1376828.78   | 0.75%             |  |  |  | No            |                  2 | On Loan: No      |
| LVMH Moet Hennessy Louis Vuitton SE | LVMH Moet Hennessy Louis Vuitton SE | CUSIP: 000000000<br>LEI: IOG4E947OATN0KJYSD45 | Long             | EC               | CORP              | FR        |      8139 | NS      | $4449181.26   | 2.41%             |  |  |  | No            |                  2 | On Loan: No      |
| Interroll Holding AG                | Interroll Holding AG                | CUSIP: 000000000<br>LEI: 529900MU4QAEI94TB543 | Long             | EC               | CORP              | CH        |       162 | NS      | $299750.78    | 0.16%             |  |  |  | No            |                  2 | On Loan: No      |
| London Stock Exchange Group PLC     | London Stock Exchange Group PLC     | CUSIP: 000000000<br>LEI: 213800QAUUUP6I445N30 | Long             | EC               | CORP              | GB        |     17675 | NS      | $2087201.23   | 1.13%             |  |  |  | No            |                  2 | On Loan: No      |
| Lonza Group AG                      | Lonza Group AG                      | CUSIP: 000000000<br>LEI: 549300EFW4H2TCZ71055 | Long             | EC               | CORP              | CH        |      6512 | NS      | $4177569.15   | 2.27%             |  |  |  | No            |                  2 | On Loan: No      |
| Nemetschek SE                       | Nemetschek SE                       | CUSIP: 000000000<br>LEI: 529900R0S2IX1S358J38 | Long             | EC               | CORP              | DE        |     25067 | NS      | $1876515.67   | 1.02%             |  |  |  | No            |                  2 | On Loan: No      |
| MatsukiyoCocokara & Co              | MatsukiyoCocokara & Co              | CUSIP: 000000000<br>LEI: N/A                  | Long             | EC               | CORP              | JP        |    129100 | NS      | $2054797.27   | 1.11%             |  |  |  | No            |                  1 | On Loan: No      |
| ALS LTD                             | ALS LTD                             | CUSIP: 000000000<br>LEI: 549300RYCQ8DMIO2J661 | Long             | EC               | CORP              | AU        |    157176 | NS      | $2307279.46   | 1.25%             |  |  |  | No            |                  2 | On Loan: No      |
| Niterra Co Ltd                      | Niterra Co Ltd                      | CUSIP: 000000000<br>LEI: 549300RG3XQGTFM4HH31 | Long             | EC               | CORP              | JP        |     76900 | NS      | $3625955.74   | 1.97%             |  |  |  | No            |                  2 | On Loan: No      |
| Nestle SA                           | Nestle SA                           | CUSIP: 000000000<br>LEI: KY37LUS27QQX7BB93L28 | Long             | EC               | CORP              | CH        |     36109 | NS      | $3541969.83   | 1.92%             |  |  |  | No            |                  2 | On Loan: No      |
| Nomura Real Estate Holdings Inc     | Nomura Real Estate Holdings Inc     | CUSIP: 000000000<br>LEI: 353800UZ91CT24OL9P59 | Long             | EC               | CORP              | JP        |    322000 | NS      | $2087778.42   | 1.13%             |  |  |  | No            |                  2 | On Loan: No      |
| Omron Corp                          | Omron Corp                          | CUSIP: 000000000<br>LEI: 549300ZHW0TR2QZ0NY83 | Long             | EC               | CORP              | JP        |     98800 | NS      | $2842386.43   | 1.54%             |  |  |  | No            |                  2 | On Loan: No      |
| Prysmian SpA                        | Prysmian SpA                        | CUSIP: 000000000<br>LEI: 529900X0H1IO3RS1A464 | Long             | EC               | CORP              | IT        |     36742 | NS      | $4338902.61   | 2.35%             |  |  |  | No            |                  2 | On Loan: No      |
| Publicis Groupe SA                  | Publicis Groupe SA                  | CUSIP: 000000000<br>LEI: 2138004KW8BV57III342 | Long             | EC               | CORP              | FR        |     26316 | NS      | $2178162.49   | 1.18%             |  |  |  | No            |                  2 | On Loan: No      |
| Rio Tinto PLC                       | Rio Tinto PLC                       | CUSIP: 000000000<br>LEI: 213800YOEO5OQ72G2R82 | Long             | EC               | CORP              | GB        |     23486 | NS      | $2178883.49   | 1.18%             |  |  |  | No            |                  2 | On Loan: No      |
| Schneider Electric SE               | Schneider Electric SE               | CUSIP: 000000000<br>LEI: 969500A1YF1XUYYXS284 | Long             | EC               | CORP              | FR        |     20193 | NS      | $5500201.73   | 2.98%             |  |  |  | No            |                  2 | On Loan: No      |
| Sekisui Chemical Co Ltd             | Sekisui Chemical Co Ltd             | CUSIP: 000000000<br>LEI: 529900KQIVT7NWFNMI70 | Long             | EC               | CORP              | JP        |    113400 | NS      | $1903834.63   | 1.03%             |  |  |  | No            |                  2 | On Loan: No      |
| Shimadzu Corp                       | Shimadzu Corp                       | CUSIP: 000000000<br>LEI: 353800Y64Z08WEH8PH97 | Long             | EC               | CORP              | JP        |    106600 | NS      | $2533121.07   | 1.37%             |  |  |  | No            |                  2 | On Loan: No      |
| Standard Chartered PLC              | Standard Chartered PLC              | CUSIP: 000000000<br>LEI: U4LOSYZ7YG4W3S5F2G91 | Long             | EC               | CORP              | GB        |    194338 | NS      | $4049975.11   | 2.20%             |  |  |  | No            |                  2 | On Loan: No      |
| Taisei Corp                         | Taisei Corp                         | CUSIP: 000000000<br>LEI: 529900TF7XJKIOWMLQ79 | Long             | EC               | CORP              | JP        |     49800 | NS      | $5159366.90   | 2.80%             |  |  |  | No            |                  2 | On Loan: No      |
| Tokyo Electron Ltd                  | Tokyo Electron Ltd                  | CUSIP: 000000000<br>LEI: 549300H5LSF8DP3RIJ34 | Long             | EC               | CORP              | JP        |     18400 | NS      | $4571497.53   | 2.48%             |  |  |  | No            |                  2 | On Loan: No      |
| TotalEnergies SE                    | TotalEnergies SE                    | CUSIP: 000000000<br>LEI: 529900S21EQ1BO4ESM68 | Long             | EC               | CORP              | FR        |     32861 | NS      | $3015789.85   | 1.64%             |  |  |  | No            |                  2 | On Loan: No      |
| Suntory Beverage & Food Ltd         | Suntory Beverage & Food Ltd         | CUSIP: 000000000<br>LEI: 549300FONLMVK7YYYH41 | Long             | EC               | CORP              | JP        |     98100 | NS      | $2770354.25   | 1.50%             |  |  |  | No            |                  2 | On Loan: No      |
| Bank of Ireland Group PLC           | Bank of Ireland Group PLC           | CUSIP: 000000000<br>LEI: 635400C8EK6DRI12LJ39 | Long             | EC               | CORP              | IE        |    236857 | NS      | $4297353.92   | 2.33%             |  |  |  | No            |                  2 | On Loan: No      |
| Convatec Group PLC                  | Convatec Group PLC                  | CUSIP: 000000000<br>LEI: 213800LS272L4FIDOH92 | Long             | EC               | CORP              | GB        |    665130 | NS      | $1918526.32   | 1.04%             |  |  |  | No            |                  2 | On Loan: No      |
| Rightmove PLC                       | Rightmove PLC                       | CUSIP: 000000000<br>LEI: 2138001JXGCFKBXYB828 | Long             | EC               | CORP              | GB        |    190972 | NS      | $1092611.02   | 0.59%             |  |  |  | No            |                  2 | On Loan: No      |
| Alimentation Couche-Tard Inc        | Alimentation Couche-Tard Inc        | CUSIP: 01626P148<br>LEI: 549300OSW32RVX8CCZ87 | Long             | EC               | CORP              | CA        |     32122 | NS      | $1820731.58   | 0.99%             |  |  |  | No            |                  1 | On Loan: No      |
| Endeavour Mining PLC                | Endeavour Mining PLC                | CUSIP: 000000000<br>LEI: 529900NI5MXQ91GHXR07 | Long             | EC               | CORP              | GB        |     45050 | NS      | $2714252.93   | 1.47%             |  |  |  | No            |                  2 | On Loan: No      |
| SGS SA                              | SGS SA                              | CUSIP: 000000000<br>LEI: 2138007JNS19JHNA2336 | Long             | EC               | CORP              | CH        |     17926 | NS      | $1889203.14   | 1.02%             |  |  |  | No            |                  2 | On Loan: No      |
| RENK Group AG                       | RENK Group AG                       | CUSIP: 000000000<br>LEI: 894500H8CNSZ53EI6K63 | Long             | EC               | CORP              | DE        |     37027 | NS      | $2213166.48   | 1.20%             |  |  |  | No            |                  2 | On Loan: No      |
| GSK PLC                             | GSK PLC                             | CUSIP: 000000000<br>LEI: 5493000HZTVUYLO1D793 | Long             | EC               | CORP              | GB        |     70565 | NS      | $1943746.65   | 1.05%             |  |  |  | No            |                  2 | On Loan: No      |
| Kokusai Electric Corp               | Kokusai Electric Corp               | CUSIP: 000000000<br>LEI: 549300CDY6N3WKYK2I96 | Long             | EC               | CORP              | JP        |     76800 | NS      | $2596968.69   | 1.41%             |  |  |  | No            |                  2 | On Loan: No      |
| Belimo Holding AG                   | Belimo Holding AG                   | CUSIP: 000000000<br>LEI: 506700339DLX749VEM23 | Long             | EC               | CORP              | CH        |      1722 | NS      | $1398520.26   | 0.76%             |  |  |  | No            |                  2 | On Loan: No      |
| Novo Nordisk A/S                    | Novo Nordisk A/S                    | CUSIP: 000000000<br>LEI: 549300DAQ1CVT6CXN342 | Long             | EC               | CORP              | DK        |     92938 | NS      | $3401019.30   | 1.84%             |  |  |  | No            |                  2 | On Loan: No      |
| Recruit Holdings Co Ltd             | Recruit Holdings Co Ltd             | CUSIP: 000000000<br>LEI: 353800R2LRSMVVC4I806 | Long             | EC               | CORP              | JP        |     59500 | NS      | $2592413.22   | 1.41%             |  |  |  | No            |                  2 | On Loan: No      |
| RECKITT BENCKISER GROUP PLC         | RECKITT BENCKISER GROUP PLC         | CUSIP: 000000000<br>LEI: 5493003JFSMOJG48V108 | Long             | EC               | CORP              | GB        |     42587 | NS      | $2863564.47   | 1.55%             |  |  |  | No            |                  2 | On Loan: No      |
| Sunbelt Rentals Holdings Inc        | Sunbelt Rentals Holdings Inc        | CUSIP: 866966104<br>LEI: 529900W4BQDNMAOSRA49 | Long             | EC               | CORP              | US        |     52488 | NS      | $3348280.69   | 1.82%             |  |  |  | No            |                  2 | On Loan: No      |
| Shopify Inc                         | Shopify Inc                         | CUSIP: 82509L107<br>LEI: 549300HGQ43STJLLP808 | Long             | EC               | CORP              | CA        |      5650 | NS      | $670396.81    | 0.36%             |  |  |  | No            |                  1 | On Loan: No      |
| BayCurrent Inc                      | BayCurrent Inc                      | CUSIP: 000000000<br>LEI: N/A                  | Long             | EC               | CORP              | JP        |     26300 | NS      | $761288.56    | 0.41%             |  |  |  | No            |                  2 | On Loan: No      |
| ICG PLC                             | ICG PLC                             | CUSIP: 000000000<br>LEI: 549300OGASR5WRKJ8R68 | Long             | EC               | CORP              | GB        |    104163 | NS      | $2136307.85   | 1.16%             |  |  |  | No            |                  2 | On Loan: No      |
| Anheuser-Busch InBev SA/NV          | Anheuser-Busch InBev SA/NV          | CUSIP: 000000000<br>LEI: 5493008H3828EMEXB082 | Long             | EC               | CORP              | BE        |     32826 | NS      | $2271102.83   | 1.23%             |  |  |  | No            |                  2 | On Loan: No      |
| VAT Group AG                        | VAT Group AG                        | CUSIP: 000000000<br>LEI: 529900MVFK7NVALR7Y83 | Long             | EC               | CORP              | CH        |      3930 | NS      | $2451698.15   | 1.33%             |  |  |  | No            |                  2 | On Loan: No      |

### Signature

**Date Signed:** 2026-05-04

**Name of Applicant:** COLUMBIA ACORN TRUST

**Signature:** Jennifer Borges

**Name of Signer:** Jennifer Borges

**Title:** Senior Manager