TLCO Teleconnect Inc (CE)

ING MUTUAL FUNDS

ING SERIES FUND, INC.

(each a “Registrant” and collectively the “Registrants”)

Supplement dated February 28, 2014 to the

Prospectuses, Summary Prospectuses, and Statements of Additional Information

each dated February 28, 2014

for each Series of the above named Registrants

(each a “Fund” and collectively, the “Funds”)

In 2013, ING U.S. announced plans to rebrand as Voya Financial following its initial public offering, which occurred in May 2013. The actual rebranding of the various businesses that comprise ING U.S.—Retirement Solutions, Investment Management and Insurance Solutions — will occur in stages, with ING U.S. Investment Management among the first to rebrand. As of May 1, 2014, ING U.S. Investment Management will be known as Voya Investment Management.  The ING entities do not anticipate that there will be any disruption in services being rendered to the Funds.

In 2014, ING U.S., Inc. will change its name to Voya Financial, Inc. Effective May 1, 2014, ING Investments, LLC, the adviser to the Funds will be renamed Voya Investments, LLC; ING Investment Management Co. LLC, sub-adviser to certain of the Funds, will be renamed Voya Investment Management Co. LLC; ING Investments Distributor, LLC, the distributor for the Funds, will be renamed Voya Investments Distributor, LLC; and ING Funds Services, LLC, the administrator for the Funds, will be renamed Voya Funds Services, LLC. Each Fund as well as each Registrant that each Fund is organized as a series of will also be renamed.

The new Registrant and Fund names will be as follows:

PLEASE RETAIN THIS SUPPLEMENT FOR FUTURE REFERENCE