<SEC-DOCUMENT>0001193125-18-064116-index.html : 20180724 <SEC-HEADER>0001193125-18-064116.hdr.sgml : 20180724 <ACCEPTANCE-DATETIME>20180228164422 <PRIVATE-TO-PUBLIC> ACCESSION NUMBER: 0001193125-18-064116 CONFORMED SUBMISSION TYPE: 485APOS PUBLIC DOCUMENT COUNT: 12 FILED AS OF DATE: 20180228 DATE AS OF CHANGE: 20180719 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: 485APOS SEC ACT: 1933 Act SEC FILE NUMBER: 002-34223 FILM NUMBER: 18651882 BUSINESS ADDRESS: STREET 1: 227 W MONROE STE 3000 CITY: CHICAGO STATE: IL ZIP: 60606 BUSINESS PHONE: 3126349200 MAIL ADDRESS: STREET 1: 227 W MONROE STE 3000 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 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: 485APOS SEC ACT: 1940 Act SEC FILE NUMBER: 811-01829 FILM NUMBER: 18651884 BUSINESS ADDRESS: STREET 1: 227 W MONROE STE 3000 CITY: CHICAGO STATE: IL ZIP: 60606 BUSINESS PHONE: 3126349200 MAIL ADDRESS: STREET 1: 227 W MONROE STE 3000 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>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> </EXISTING-SERIES-AND-CLASSES-CONTRACTS> </SERIES-AND-CLASSES-CONTRACTS-DATA> </SEC-HEADER> <DOCUMENT> <TYPE>485APOS <SEQUENCE>1 <FILENAME>d508591d485apos.htm <DESCRIPTION>COLUMBIA ACORN TRUST <TEXT> Document 1 - file: d508591d485apos.htm
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>3 <FILENAME>g508591g83h77.jpg <DESCRIPTION>GRAPHIC <TEXT> Document 3 - file: g508591g83h77.jpg
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</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>11 <FILENAME>g607110imgb8433dca2.jpg <DESCRIPTION>GRAPHIC <TEXT> Document 11 - file: g607110imgb8433dca2.jpg
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>12 <FILENAME>g607110logocolor_1.jpg <DESCRIPTION>GRAPHIC <TEXT> Document 12 - file: g607110logocolor_1.jpg
</DOCUMENT> <DOCUMENT> <TYPE>CORRESP <SEQUENCE>13 <FILENAME>filename13.htm <TEXT> Document 13 - file: filename13.htm
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