ING Investors Trust

ING Limited Maturity Bond Portfolio (“Portfolio”)

Supplement dated June 10, 2013

to the Portfolio’s Adviser Class (“Class ADV”) Prospectus, Institutional Class (“Class I”) Prospectus, and
Service Class (“Class S”) Prospectus dated April 30, 2013; and

(each a “Prospectus” and collectively “Prospectuses”)

On May 22, 2013, the Portfolio’s Board of Trustees (“Board”) approved a clarification of how the Portfolio’s average dollar-weighted maturity is calculated effective May 31, 2013.  The Portfolio’s Prospectuses are hereby revised as follows:

The section entitled “Principal Investment Strategies” of the Portfolio’s Prospectuses is hereby deleted in its entirety and replaced with the following:

PRINCIPAL INVESTMENT STRATEGIES

Under normal market conditions, the Portfolio invests at least 80% of its net assets (plus borrowing for investment purposes) in a diversified portfolio of bonds that are limited maturity debt instruments. The Portfolio will provide shareholders with at least 60 days’ prior notice of any change in this investment policy. These short- to intermediate-term debt instruments have remaining maturities of seven years or less. The dollar-weighted average maturity of the Portfolio generally will not exceed five years and in periods of rising interest rates may be shortened to one year or less. Because of the Portfolio’s holdings in asset-backed, mortgage-backed, and similar securities, the Portfolio’s average dollar-weighted maturity is equivalent to the average weighted maturity of the cash flows in the securities held by the Portfolio given prepayment assumptions (also known as weighted average life). Under normal market conditions, the Portfolio maintains significant exposure to government securities.

The Portfolio invests in non-government securities, issued by companies of all sizes, only if rated investment-grade by a nationally recognized statistical rating organization (e.g., Baa3 or better by Moody’s Investors Service, Inc. (“Moody’s”) or BBB- or better by Standard & Poor’s Ratings Services (“S&P”) or BBB- or better by Fitch Ratings (“Fitch”)) or, if not rated by Moody’s, S&P or Fitch, if the sub-adviser (“Sub-Adviser”) determines at the time of purchase that they are of comparable quality. Money market securities must be rated in the two highest rating categories by Moody’s (P-1 or P-2), S&P (A-1+, A-1 or A-2) or Fitch (A-1+, A-1 or A-2), or determined, at the time of purchase, to be of comparable quality by the Sub-Adviser.

The Portfolio may also invest in: preferred stocks; U.S. government securities, securities of foreign governments, and supranational organizations; mortgage bonds; municipal bonds, notes, and commercial paper; and debt instruments of foreign issuers. The Portfolio may engage in dollar roll transactions and swap agreements, including credit default swaps. The Portfolio may use options and futures contracts involving securities, securities indices and interest rates to hedge against market risk, to enhance returns and as a substitute for conventional securities. A portion of the Portfolio’s assets may be invested in mortgage-backed and asset-backed debt instruments.

In addition, private placements of debt instruments (which are often restricted securities) are eligible for purchase along with other illiquid securities, subject to appropriate limits.

The Portfolio may borrow up to 10% of the value of its net assets. This amount may be increased to 25% for temporary purposes.

The Portfolio may invest in other investment companies, including exchange-traded funds, to the extent permitted under the Investment Company Act of 1940, as amended, and the rules, regulations, and exemptive orders thereunder (“1940 Act”). The Sub-Adviser utilizes the following decision making process to achieve the Portfolio’s objectives:

Active Duration Management. The average duration of the Portfolio is actively managed relative to the benchmark’s average duration. In rising interest rate environments, the average duration will tend to be equal to or less than the benchmark and in falling interest rate environments, the average duration will tend to be greater than the benchmark;

Yield Curve Analysis. The yield curve shape is assessed to identify the risk/reward trade-off of maturity decisions and market expectations of future interest rates;

Sector Selection. Sectors are overweighted or underweighted relative to the benchmark based on sector analysis and market opportunities. Sectors are broadly defined to include U.S. Treasury securities, U.S. government agency securities, corporate securities, mortgage-backed securities, asset-backed securities, and money market securities. The Sub-Adviser may further evaluate groupings within sectors such as various industry groups within the corporate securities sector (e.g., finance, industrials, utilities, etc.); and

Security Selection. The Sub-Adviser emphasizes individual securities with positive credit fundamentals, liquidity, and relative value within their respective sectors.

The Sub-Adviser may sell securities for a variety of reasons, such as to secure gains, limit losses, or redeploy assets into opportunities believed to be more promising, among others.

The Portfolio may lend portfolio securities on a short-term or long-term basis, up to 331/3% of its total assets.

PLEASE RETAIN THIS SUPPLEMENT FOR FUTURE REFERENCE

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