<SEC-DOCUMENT>0001683863-21-001250-index.html : 20210302 <SEC-HEADER>0001683863-21-001250.hdr.sgml : 20210302 <ACCEPTANCE-DATETIME>20210302094420 ACCESSION NUMBER: 0001683863-21-001250 CONFORMED SUBMISSION TYPE: N-CSR PUBLIC DOCUMENT COUNT: 24 CONFORMED PERIOD OF REPORT: 20201231 FILED AS OF DATE: 20210302 DATE AS OF CHANGE: 20210302 EFFECTIVENESS DATE: 20210302 FILER: COMPANY DATA: COMPANY CONFORMED NAME: COLUMBIA ACORN TRUST CENTRAL INDEX KEY: 0000002110 IRS NUMBER: 362692100 STATE OF INCORPORATION: MA FISCAL YEAR END: 1231 FILING VALUES: FORM TYPE: N-CSR SEC ACT: 1940 Act SEC FILE NUMBER: 811-01829 FILM NUMBER: 21701540 BUSINESS ADDRESS: STREET 1: 71 S. WACKER DRIVE, SUITE 2500 CITY: CHICAGO STATE: IL ZIP: 60606 BUSINESS PHONE: 3126349200 MAIL ADDRESS: STREET 1: 71 S. WACKER DRIVE, SUITE 2500 CITY: CHICAGO STATE: IL ZIP: 60606 FORMER COMPANY: FORMER CONFORMED NAME: LIBERTY ACORN TRUST DATE OF NAME CHANGE: 20010424 FORMER COMPANY: FORMER CONFORMED NAME: ACORN INVESTMENT TRUST DATE OF NAME CHANGE: 19940204 FORMER COMPANY: FORMER CONFORMED NAME: ACORN FUND INC DATE OF NAME CHANGE: 19920703 <SERIES-AND-CLASSES-CONTRACTS-DATA> <EXISTING-SERIES-AND-CLASSES-CONTRACTS> <SERIES> <OWNER-CIK>0000002110 <SERIES-ID>S000009184 <SERIES-NAME>Columbia Acorn Fund <CLASS-CONTRACT> <CLASS-CONTRACT-ID>C000024954 <CLASS-CONTRACT-NAME>Columbia Acorn Fund Class A <CLASS-CONTRACT-TICKER-SYMBOL>LACAX </CLASS-CONTRACT> <CLASS-CONTRACT> <CLASS-CONTRACT-ID>C000024956 <CLASS-CONTRACT-NAME>Columbia Acorn Fund Class C <CLASS-CONTRACT-TICKER-SYMBOL>LIACX </CLASS-CONTRACT> <CLASS-CONTRACT> <CLASS-CONTRACT-ID>C000024957 <CLASS-CONTRACT-NAME>Columbia Acorn Fund Institutional Class <CLASS-CONTRACT-TICKER-SYMBOL>ACRNX </CLASS-CONTRACT> <CLASS-CONTRACT> <CLASS-CONTRACT-ID>C000122735 <CLASS-CONTRACT-NAME>Columbia Acorn Fund Advisor Class <CLASS-CONTRACT-TICKER-SYMBOL>CEARX </CLASS-CONTRACT> <CLASS-CONTRACT> <CLASS-CONTRACT-ID>C000122736 <CLASS-CONTRACT-NAME>Columbia Acorn Fund Institutional 2 Class <CLASS-CONTRACT-TICKER-SYMBOL>CRBRX </CLASS-CONTRACT> <CLASS-CONTRACT> <CLASS-CONTRACT-ID>C000122737 <CLASS-CONTRACT-NAME>Columbia Acorn Fund Institutional 3 Class <CLASS-CONTRACT-TICKER-SYMBOL>CRBYX </CLASS-CONTRACT> </SERIES> <SERIES> <OWNER-CIK>0000002110 <SERIES-ID>S000009185 <SERIES-NAME>Columbia Acorn International <CLASS-CONTRACT> <CLASS-CONTRACT-ID>C000024958 <CLASS-CONTRACT-NAME>Columbia Acorn International Class A <CLASS-CONTRACT-TICKER-SYMBOL>LAIAX </CLASS-CONTRACT> <CLASS-CONTRACT> <CLASS-CONTRACT-ID>C000024960 <CLASS-CONTRACT-NAME>Columbia Acorn International Class C <CLASS-CONTRACT-TICKER-SYMBOL>LAICX </CLASS-CONTRACT> <CLASS-CONTRACT> <CLASS-CONTRACT-ID>C000024961 <CLASS-CONTRACT-NAME>Columbia Acorn International Institutional Class <CLASS-CONTRACT-TICKER-SYMBOL>ACINX </CLASS-CONTRACT> <CLASS-CONTRACT> <CLASS-CONTRACT-ID>C000097732 <CLASS-CONTRACT-NAME>Columbia Acorn International Class R <CLASS-CONTRACT-TICKER-SYMBOL>CACRX </CLASS-CONTRACT> <CLASS-CONTRACT> <CLASS-CONTRACT-ID>C000097733 <CLASS-CONTRACT-NAME>Columbia Acorn International Institutional 2 Class <CLASS-CONTRACT-TICKER-SYMBOL>CAIRX </CLASS-CONTRACT> <CLASS-CONTRACT> <CLASS-CONTRACT-ID>C000122738 <CLASS-CONTRACT-NAME>Columbia Acorn International Advisor Class <CLASS-CONTRACT-TICKER-SYMBOL>CCIRX </CLASS-CONTRACT> <CLASS-CONTRACT> <CLASS-CONTRACT-ID>C000122739 <CLASS-CONTRACT-NAME>Columbia Acorn International Institutional 3 Class <CLASS-CONTRACT-TICKER-SYMBOL>CCYIX </CLASS-CONTRACT> </SERIES> <SERIES> <OWNER-CIK>0000002110 <SERIES-ID>S000009186 <SERIES-NAME>Columbia Acorn USA <CLASS-CONTRACT> <CLASS-CONTRACT-ID>C000024962 <CLASS-CONTRACT-NAME>Columbia Acorn USA Class A <CLASS-CONTRACT-TICKER-SYMBOL>LAUAX </CLASS-CONTRACT> <CLASS-CONTRACT> <CLASS-CONTRACT-ID>C000024964 <CLASS-CONTRACT-NAME>Columbia Acorn USA Class C <CLASS-CONTRACT-TICKER-SYMBOL>LAUCX </CLASS-CONTRACT> <CLASS-CONTRACT> <CLASS-CONTRACT-ID>C000024965 <CLASS-CONTRACT-NAME>Columbia Acorn USA Institutional Class <CLASS-CONTRACT-TICKER-SYMBOL>AUSAX </CLASS-CONTRACT> <CLASS-CONTRACT> <CLASS-CONTRACT-ID>C000122740 <CLASS-CONTRACT-NAME>Columbia Acorn USA Advisor Class <CLASS-CONTRACT-TICKER-SYMBOL>CUSAX </CLASS-CONTRACT> <CLASS-CONTRACT> <CLASS-CONTRACT-ID>C000122741 <CLASS-CONTRACT-NAME>Columbia Acorn USA Institutional 2 Class <CLASS-CONTRACT-TICKER-SYMBOL>CYSRX </CLASS-CONTRACT> <CLASS-CONTRACT> <CLASS-CONTRACT-ID>C000122742 <CLASS-CONTRACT-NAME>Columbia Acorn USA Institutional 3 Class <CLASS-CONTRACT-TICKER-SYMBOL>CUSYX </CLASS-CONTRACT> </SERIES> <SERIES> <OWNER-CIK>0000002110 <SERIES-ID>S000009188 <SERIES-NAME>Columbia Acorn International Select <CLASS-CONTRACT> <CLASS-CONTRACT-ID>C000024970 <CLASS-CONTRACT-NAME>Columbia Acorn International Select Class A <CLASS-CONTRACT-TICKER-SYMBOL>LAFAX </CLASS-CONTRACT> <CLASS-CONTRACT> <CLASS-CONTRACT-ID>C000024972 <CLASS-CONTRACT-NAME>Columbia Acorn International Select Class C <CLASS-CONTRACT-TICKER-SYMBOL>LFFCX </CLASS-CONTRACT> <CLASS-CONTRACT> <CLASS-CONTRACT-ID>C000024973 <CLASS-CONTRACT-NAME>Columbia Acorn International Select Institutional Class <CLASS-CONTRACT-TICKER-SYMBOL>ACFFX </CLASS-CONTRACT> <CLASS-CONTRACT> <CLASS-CONTRACT-ID>C000122746 <CLASS-CONTRACT-NAME>Columbia Acorn International Select Institutional 2 Class <CLASS-CONTRACT-TICKER-SYMBOL>CRIRX </CLASS-CONTRACT> <CLASS-CONTRACT> <CLASS-CONTRACT-ID>C000122747 <CLASS-CONTRACT-NAME>Columbia Acorn International Select Institutional 3 Class <CLASS-CONTRACT-TICKER-SYMBOL>CSIRX </CLASS-CONTRACT> <CLASS-CONTRACT> <CLASS-CONTRACT-ID>C000122748 <CLASS-CONTRACT-NAME>Columbia Acorn International Select Advisor Class <CLASS-CONTRACT-TICKER-SYMBOL>CILRX </CLASS-CONTRACT> </SERIES> <SERIES> <OWNER-CIK>0000002110 <SERIES-ID>S000009189 <SERIES-NAME>Columbia Thermostat Fund <CLASS-CONTRACT> <CLASS-CONTRACT-ID>C000024974 <CLASS-CONTRACT-NAME>Columbia Thermostat Fund Class A <CLASS-CONTRACT-TICKER-SYMBOL>CTFAX </CLASS-CONTRACT> <CLASS-CONTRACT> <CLASS-CONTRACT-ID>C000024976 <CLASS-CONTRACT-NAME>Columbia Thermostat Fund Class C <CLASS-CONTRACT-TICKER-SYMBOL>CTFDX </CLASS-CONTRACT> <CLASS-CONTRACT> <CLASS-CONTRACT-ID>C000024977 <CLASS-CONTRACT-NAME>Columbia Thermostat Fund Institutional Class <CLASS-CONTRACT-TICKER-SYMBOL>COTZX </CLASS-CONTRACT> <CLASS-CONTRACT> <CLASS-CONTRACT-ID>C000122749 <CLASS-CONTRACT-NAME>Columbia Thermostat Fund Advisor Class <CLASS-CONTRACT-TICKER-SYMBOL>CTORX </CLASS-CONTRACT> <CLASS-CONTRACT> <CLASS-CONTRACT-ID>C000122750 <CLASS-CONTRACT-NAME>Columbia Thermostat Fund Institutional 2 Class <CLASS-CONTRACT-TICKER-SYMBOL>CQTRX </CLASS-CONTRACT> <CLASS-CONTRACT> <CLASS-CONTRACT-ID>C000122751 <CLASS-CONTRACT-NAME>Columbia Thermostat Fund Institutional 3 Class <CLASS-CONTRACT-TICKER-SYMBOL>CYYYX </CLASS-CONTRACT> </SERIES> <SERIES> <OWNER-CIK>0000002110 <SERIES-ID>S000033621 <SERIES-NAME>Columbia Acorn European Fund <CLASS-CONTRACT> <CLASS-CONTRACT-ID>C000103324 <CLASS-CONTRACT-NAME>Columbia Acorn European Fund Class A <CLASS-CONTRACT-TICKER-SYMBOL>CAEAX </CLASS-CONTRACT> <CLASS-CONTRACT> <CLASS-CONTRACT-ID>C000103325 <CLASS-CONTRACT-NAME>Columbia Acorn European Fund Class C <CLASS-CONTRACT-TICKER-SYMBOL>CAECX </CLASS-CONTRACT> <CLASS-CONTRACT> <CLASS-CONTRACT-ID>C000103327 <CLASS-CONTRACT-NAME>Columbia Acorn European Fund Institutional Class <CLASS-CONTRACT-TICKER-SYMBOL>CAEZX </CLASS-CONTRACT> <CLASS-CONTRACT> <CLASS-CONTRACT-ID>C000122752 <CLASS-CONTRACT-NAME>Columbia Acorn European Fund Institutional 2 Class <CLASS-CONTRACT-TICKER-SYMBOL>CAEEX </CLASS-CONTRACT> <CLASS-CONTRACT> <CLASS-CONTRACT-ID>C000144049 <CLASS-CONTRACT-NAME>Columbia Acorn European Fund Advisor Class <CLASS-CONTRACT-TICKER-SYMBOL>CLOFX </CLASS-CONTRACT> <CLASS-CONTRACT> <CLASS-CONTRACT-ID>C000171393 <CLASS-CONTRACT-NAME>Columbia Acorn European Fund Institutional 3 Class <CLASS-CONTRACT-TICKER-SYMBOL>CAEYX </CLASS-CONTRACT> </SERIES> </EXISTING-SERIES-AND-CLASSES-CONTRACTS> </SERIES-AND-CLASSES-CONTRACTS-DATA> </SEC-HEADER> <DOCUMENT> <TYPE>N-CSR <SEQUENCE>1 <FILENAME>f8205d1.htm <DESCRIPTION>COLUMBIA ACORN TRUST <TEXT> Document 1 - file: f8205d1.htm
</DOCUMENT> <DOCUMENT> <TYPE>EX-99.CODE ETH <SEQUENCE>2 <FILENAME>f8205d2.htm <DESCRIPTION>CODE OF ETHICS <TEXT> Document 2 - file: f8205d2.htm
</DOCUMENT> <DOCUMENT> <TYPE>EX-99.CERT <SEQUENCE>3 <FILENAME>f8205d3.htm <DESCRIPTION>SECTION 302 CERTIFICATION <TEXT> Document 3 - file: f8205d3.htm
</DOCUMENT> <DOCUMENT> <TYPE>EX-99.906 CERT <SEQUENCE>4 <FILENAME>f8205d4.htm <DESCRIPTION>SECTION 906 CERTIFICATION <TEXT> Document 4 - file: f8205d4.htm
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>5 <FILENAME>img098ccc4a1.jpg <DESCRIPTION>GRAPHIC <TEXT> Document 5 - file: img098ccc4a1.jpg
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>6 <FILENAME>img0d9f69b68.jpg <DESCRIPTION>GRAPHIC <TEXT> Document 6 - file: img0d9f69b68.jpg
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>7 <FILENAME>img13544d925.jpg <DESCRIPTION>GRAPHIC <TEXT> Document 7 - file: img13544d925.jpg
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>8 <FILENAME>img20e6c60b9.jpg <DESCRIPTION>GRAPHIC <TEXT> Document 8 - file: img20e6c60b9.jpg
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>9 <FILENAME>img29d4987f12.jpg <DESCRIPTION>GRAPHIC <TEXT> Document 9 - file: img29d4987f12.jpg
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>10 <FILENAME>img33a654332.jpg <DESCRIPTION>GRAPHIC <TEXT> Document 10 - file: img33a654332.jpg
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>11 <FILENAME>img672a46526.jpg <DESCRIPTION>GRAPHIC <TEXT> Document 11 - file: img672a46526.jpg
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>12 <FILENAME>img6926ca9d11.jpg <DESCRIPTION>GRAPHIC <TEXT> Document 12 - file: img6926ca9d11.jpg
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>13 <FILENAME>img7fe46ffa7.jpg <DESCRIPTION>GRAPHIC <TEXT> Document 13 - file: img7fe46ffa7.jpg
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>14 <FILENAME>img9012c28710.jpg <DESCRIPTION>GRAPHIC <TEXT> Document 14 - file: img9012c28710.jpg
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>15 <FILENAME>imgcf267e843.jpg <DESCRIPTION>GRAPHIC <TEXT> Document 15 - file: imgcf267e843.jpg
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>16 <FILENAME>imge345e13b4.jpg <DESCRIPTION>GRAPHIC <TEXT> Document 16 - file: imge345e13b4.jpg
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>17 <FILENAME>g65mbaz0gis1ex6vrrg70.jpg <DESCRIPTION>GRAPHIC <TEXT> Document 17 - file: g65mbaz0gis1ex6vrrg70.jpg
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>18 <FILENAME>gf6z4rkk02i08c68ktwtj.jpg <DESCRIPTION>GRAPHIC <TEXT> Document 18 - file: gf6z4rkk02i08c68ktwtj.jpg
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>19 <FILENAME>ghwljqscdc6hqgqgqg4wn.jpg <DESCRIPTION>GRAPHIC <TEXT> Document 19 - file: ghwljqscdc6hqgqgqg4wn.jpg
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>20 <FILENAME>ghzywc2s7t8pn89aayrl9.jpg <DESCRIPTION>GRAPHIC <TEXT> Document 20 - file: ghzywc2s7t8pn89aayrl9.jpg
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>21 <FILENAME>gm3r787fdy27eqd0lef5k.jpg <DESCRIPTION>GRAPHIC <TEXT> Document 21 - file: gm3r787fdy27eqd0lef5k.jpg
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>22 <FILENAME>gpzzbosh1hmgymqdm137y.jpg <DESCRIPTION>GRAPHIC <TEXT> Document 22 - file: gpzzbosh1hmgymqdm137y.jpg
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>23 <FILENAME>gqf18qealgyvnm9d65bnh.jpg <DESCRIPTION>GRAPHIC <TEXT> Document 23 - file: gqf18qealgyvnm9d65bnh.jpg
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>24 <FILENAME>gsofixqvk0rt8rbpm4ua3.jpg <DESCRIPTION>GRAPHIC <TEXT> Document 24 - file: gsofixqvk0rt8rbpm4ua3.jpg
</DOCUMENT> </SEC-DOCUMENT>