13F-HR 1 wat13f-033103.txt 13G UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 13F COVER PAGE REPORT FOR THE CALANDAR YEAR OR QUARTER ENDED: 03/31/2003 CHECK HERE IF AMENDMENT [ ]; AMEMDMENT NUMBER: THIS AMENDMENT (CHECK ONLY ONE): [ ] IS A RESTATMENT. [ ] ADDS NEW HOLDINGS ENTRIES. INSTITUTIONAL INVESTMENT MANAGER FILING THIS REPORT: NAME: WANGER ADVISORS TRUST ADRESS: 227 W MONROE, SUITE 3000 CHICAGO, IL 60606 13F FILE NUMBER: 28-5842 THE INSTITUTIONAL INVESTMENT MANAGER FILING THIS REPORT AND THE PERSON BY WHOM IT IS SIGNED REPRESENT THAT THE PERSON SIGNING THE REPORT IS AUTHORIZED TO SUBMIT IT, THAT ALL INFORMATION CONTAINED HEREIN IS TRUE, CORRECT AND COMPLETE, AND THAT IT IS UNDERSTOOD THAT ALL REQUIRED ITEMS, STATEMENTS, SCHEDULES, LISTS AND TABLES, ARE CONSIDERED INTEGRAL PARTS OF THIS FORM. PERSON SIGNING THIS REPORT ON BEHALF OF REPORTING MANAGER: NAME: BRUCE H. LAUER TITLE: TREASURER PHONE: 312 634 9230 SIGNATURE, PLACE AND DATE OF SIGNING BRUCE H. LAUER, CHICAGO, IL April 22, 2003 REPORT TYPE (CHECK ONLY ONE): [ ] 13F HOLDINGS REPORT [ X ] 13F NOTICE [ ] 13F COMBINATION REPORT LIST OF OTHER MANAGERS REPORTING FOR THIS MANAGER: LIBERTY WANGER ASSET MANAGEMENT, LP, 13F FILE NUMBER: 801-41391 I AM SIGNING THIS REPORT AS IS REQUIRED BY THE SECURITIES EXCHANGE ACT OF 1934.