497 1 marpingva-10_marathonplussup.htm SUPPLEMENT marpingva-10_marathonplussup.htm - Generated by SEC Publisher for SEC Filing
SUPPLEMENT Dated June 14, 2010 
To the Prospectus Dated April 30, 2010 
 
ING Marathon Plus                                    ING Variable Annuity 
 
Issued By ING Life Insurance and Annuity Company 
Through its Variable Annuity Account B 

This supplement updates the prospectus. Please read this supplement carefully and keep it with your 
copy of the prospectus for future reference. If you have any questions, please call our Customer Service 
Center at 1-800-531-4547. 

  The following changes apply to certain investment portfolios that are currently available under your
contract. These changes consist of name changes or subadviser changes. The investment objective of
each portfolio is unchanged. The explanatory parentheticals clarify the specific changes for each
investment portfolio. Appendix III is hereby amended as follows (with the list of available investment
portfolios at the front of the prospectus revised accordingly).

Fund Name and   
Investment Adviser/Subadviser  Investment Objective 
ING Investors Trust   
7337 E. Doubletree Ranch Road, Scottsdale, AZ 85258   
ING Large Cap Growth Portfolio (formerly known as  Seeks long-term capital growth. 
ING Wells Fargo Omega Growth Portfolio)   
 
     Investment Adviser: Directed Services LLC   
     Investment Subadviser: ING Investment Management Co.   
     (formerly, Wells Capital Management Inc.)   
 
ING Partners, Inc.   
7337 East Doubletree Ranch Road, Scottsdale, AZ 85258   
ING Van Kampen Equity and Income Portfolio  Seeks total return, consisting of long-term capital appreciation 
  and current income. 
   Investment Adviser: Directed Services LLC   
   Investment Subadviser: Invesco Advisers, Inc. (formerly   
   known as Van Kampen)   

MARPINGVA-10  06/14/2010