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 report dated February 22, 2023, relating to the financial statements and financial highlights, which appears in the Annual Report on Form N-CSR of the funds indicated in Appendix A for the year ended December 31, 2022. 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, 2023

Appendix A

Fund Name

Columbia Acorn European Fund^SM

Columbia Acorn^® Fund

Columbia Acorn International^®

Columbia Acorn International Select^SM

Columbia Thermostat Fund^SM