<SEC-DOCUMENT>0001193125-24-114294-index.html : 20240425 <SEC-HEADER>0001193125-24-114294.hdr.sgml : 20240425 <ACCEPTANCE-DATETIME>20240425171057 ACCESSION NUMBER: 0001193125-24-114294 CONFORMED SUBMISSION TYPE: 497K PUBLIC DOCUMENT COUNT: 7 FILED AS OF DATE: 20240425 DATE AS OF CHANGE: 20240425 EFFECTIVENESS DATE: 20240425 FILER: COMPANY DATA: COMPANY CONFORMED NAME: COLUMBIA ACORN TRUST CENTRAL INDEX KEY: 0000002110 ORGANIZATION NAME: IRS NUMBER: 362692100 STATE OF INCORPORATION: MA FISCAL YEAR END: 1231 FILING VALUES: FORM TYPE: 497K SEC ACT: 1933 Act SEC FILE NUMBER: 002-34223 FILM NUMBER: 24877425 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>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> <CLASS-CONTRACT> <CLASS-CONTRACT-ID>C000251062 <CLASS-CONTRACT-NAME>Columbia Thermostat Class S </CLASS-CONTRACT> </SERIES> </EXISTING-SERIES-AND-CLASSES-CONTRACTS> </SERIES-AND-CLASSES-CONTRACTS-DATA> </SEC-HEADER> <DOCUMENT> <TYPE>497K <SEQUENCE>1 <FILENAME>d799558d497k.htm <DESCRIPTION>COLUMBIA ACORN TRUST - THERMOSTAT FUND <TEXT> Document 1 - file: d799558d497k.htm
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>2 <FILENAME>g607054acorn_cticyanc.gif <DESCRIPTION>GRAPHIC <TEXT> Document 2 - file: g607054acorn_cticyanc.gif
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>3 <FILENAME>g607054acorns_sized.gif <DESCRIPTION>GRAPHIC <TEXT> Document 3 - file: g607054acorns_sized.gif
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>4 <FILENAME>g607054bg_655.jpg <DESCRIPTION>GRAPHIC <TEXT> Document 4 - file: g607054bg_655.jpg
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>5 <FILENAME>g607054coltnlogospot.gif <DESCRIPTION>GRAPHIC <TEXT> Document 5 - file: g607054coltnlogospot.gif
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>6 <FILENAME>g607054cyanblocks.gif <DESCRIPTION>GRAPHIC <TEXT> Document 6 - file: g607054cyanblocks.gif
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>7 <FILENAME>g607054imgca13f5fd1.gif <DESCRIPTION>GRAPHIC <TEXT> Document 7 - file: g607054imgca13f5fd1.gif
</DOCUMENT> </SEC-DOCUMENT>