As filed with the Securities and Exchange Commission on May 14, 2019

Securities Act Registration No. 33-83548

Investment Company Act File No. 811-08748

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, D.C. 20549

FORM N-1A

REGISTRATION STATEMENT UNDER THE SECURITIES ACT OF 1933

Post-Effective Amendment No. 44

and

REGISTRATION STATEMENT UNDER THE INVESTMENT COMPANY ACT OF 1940

Amendment No. 45

WANGER ADVISORS TRUST

(Registrant)

227 West Monroe Street, Suite 3000

Chicago, Illinois 60606

Telephone number: 312.634.9200

Ryan C. Larrenaga c/o Columbia Management Investment Advisers, LLC 225 Franklin Street Boston, MA 02110	Matthew A. Litfin     Louis J. Mendes     Wanger Advisors Trust     227 West Monroe Street,     Suite 3000     Chicago, Illinois 60606	Mary C. Moynihan Perkins Coie LLP 700 13th Street, N.W., Suite 600 Washington, D.C. 20005
	(Agents for service)

It is proposed that this filing will become effective:

☒   immediately upon filing pursuant to rule 485(b)

☐   on              pursuant to rule 485(b)

☐   60 days after filing pursuant to rule 485(a)(1)

☐   on              pursuant to rule 485(a)(1)

☐   75 days after filing pursuant to rule 485(a)(2)

☐   on              pursuant to rule 485(a)(2)

SIGNATURE

Pursuant to the requirements of the Securities Act of 1933 and the Investment Company Act of 1940, the Registrant certifies that it meets all the requirements for effectiveness of this post-effective amendment pursuant to Rule 485(b) under the Securities Act of 1933 and has duly caused this registration statement to be signed on its behalf by the undersigned, thereunto duly authorized, in the City of Chicago and State of Illinois on May 14, 2019.

WANGER ADVISORS TRUST
By:	/s/ Matthew A. Litfin
	Matthew A. Litfin, Co-President
By:	/s/ Louis J. Mendes
	Louis J. Mendes, Co-President

Pursuant to the requirements of the Securities Act of 1933, this amendment to the registration statement has been signed below by the following persons in the capacities and on the dates indicated.

Name	Title		Date
/s/ Laura M. Born	Trustee and Chair	)
Laura M. Born		)
		)
/s/ Maureen M. Culhane	Trustee	)
Maureen M. Culhane		)
		)
/s/ Margaret M. Eisen	Trustee	)
Margaret M. Eisen		)
		)
/s/ Eric Feldstein	Trustee	)
Eric Feldstein		)
		)
/s/ John C. Heaton	Trustee	)
John C. Heaton		)	May 14, 2019
		)
/s/ Charles R. Phillips	Trustee	)
Charles R. Phillips		)
		)
/s/ David J. Rudis	Trustee	)
David J. Rudis		)
		)
/s/ Louis J. Mendes Louis J. Mendes	Co-President and Principal Executive Officer	)
		)
		)
/s/ John M. Kunka	Vice President and Treasurer (Principal Financial Officer)	)
John M. Kunka		)

Exhibit Index

Exhibit No.	Description
EX-101.INS	XBRL Instance Document
EX-101.SCH	XBRL Taxonomy Extension Schema Document
EX-101.CAL	XBRL Taxonomy Extension Calculation Linkbase
EX-101.DEF	XBRL Taxonomy Extension Definition Linkbase
EX-101.LAB	XBRL Taxonomy Extension Labels Linkbase
EX-101.PRE	XBRL Taxonomy Extension Presentation Linkbase