CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

We hereby consent to the incorporation by reference in this Registration Statement on Form N-1A of Columbia Acorn Trust of our reports dated February 18, 2022, relating to the financial statements and financial highlights, which appear in the Annual Reports on Form N-CSR of the funds indicated in Appendix A for the year ended December 31, 2021. We also consent to the references to us under the headings “Financial Highlights” and “Independent Registered Public Accounting Firm” in such Registration Statement.

/s/PricewaterhouseCoopers LLP

Minneapolis, Minnesota

April 27, 2022


Appendix A

Fund Name

Columbia Acorn European FundSM

Columbia Acorn® Fund

Columbia Acorn International®

Columbia Acorn International SelectSM

Columbia Acorn USA®

Columbia Thermostat FundSM