Federated Alabama Municipal Cash Trust

A Portfolio of Money Market Obligations Trust

(TICKER ALMXX)

SUPPLEMENT TO the summary prospectus and PROSPECTUS DATED February 28, 2013

This Supplement relates to the proposed liquidation of Federated Alabama Municipal Cash Trust (the “Fund”).

Federated Securities Corp. (“ Distributor”), the distributor of the Fund, and Federated Investment Management Company (“Adviser”), the investment adviser of the Fund, recommended that the Board of Trustees (“Board”) of the Money Market Obligations Trust (“Trust”) approve the liquidation of the Fund. On May 17, 2013, based on the recommendation of the Fund's Adviser and Distributor, the Board determined that the liquidation of the Fund was in the best interests of the Fund and its shareholders, and approved a Plan of Liquidation for the Fund. The Fund's Adviser and Distributor recommended the liquidation of the Fund based on a determination that the Fund is no longer economically viable given its asset size, annual maintenance costs, and low prospects for future growth. As required by the Trust's Declaration of Trust, the Board also approved submitting the Plan of Liquidation to the shareholders of the Fund for approval. Unless all shareholders redeem from the Fund prior to July 19, 2013, shareholders of record of the Fund as of such date (the “Record Date”), will receive a proxy statement asking for approval of the Plan of Liquidation at a Special Shareholders Meeting to be held on or about September 10, 2013. In order to satisfy any applicable quorum requirement for the Special Meeting of Shareholders, the Adviser, and/or its affiliates, will make an investment in (i.e., purchasing shares of) the Fund on or prior to July 17, 2013. The Adviser, and/or its affiliates, will vote their shares in proportion to the negative and affirmative votes received from other shareholders of the Fund. If the Plan of Liquidation is approved at the Special Shareholders Meeting, the Fund will be liquidated on or about September 20, 2013 (the “Liquidation Date” ). Any shares outstanding at the close of business on the Liquidation Date will be automatically redeemed. Such redemption will follow the procedures set forth in the Fund's Prospectus, Declaration of Trust and Plan of Liquidation. Income, if any, will continue to accrue until the Fund's liquidation and will be paid upon liquidation. Net capital gains, if any, will be distributed prior to liquidation. Any capital gains distributed to shareholders will be subject to tax.

Effective as of May 21, 2013, the Fund will be closed to new accounts (other than new sweep account investors). Beginning on that date, no person will be able to open a new account with the Fund (other than a new sweep account). Effective July 1, 2013, the Fund will be closed to new sweep account investors as well. Effective as of July 18, 2013, the Fund will be closed to new investments (except for reinvestment of dividends and automatic investment plan programs). Beginning on that date, no shareholder will be able to add new money into their account with, or make any additional investment in, the Fund (except for reinvestment of dividends and automatic investment plan programs).

Any time prior to the Liquidation Date, the shareholders of the Fund may redeem their shares of the Fund pursuant to the procedures set forth in the Fund's Prospectus. Shareholders may also exchange their shares of the Fund for shares of any Federated fund or share class that does not have a stated sales charge or contingent deferred sales charge, except Federated Liberty U.S. Government Money Market Trust and R Class, if the shareholder meets the eligibility criteria and investment minimum for the fund for which the shareholder is exchanging and otherwise complies with the requirements of the Fund's Prospectus applicable to exchanges. FSC, and its affiliates, will be working with the Fund's shareholders and intermediaries to identify other Federated funds and to either redeem or transfer (or exchange) the shareholders' investment to such other Federated funds. It is likely that shareholders of the Fund will redeem or exchange their shares of the Fund prior to the Record Date and/or Liquidation Date. Like other shareholders of the Fund, the Adviser, and/or its affiliates, also may redeem all or any portion of any investment made by them in the Fund at any time after the Record Date and prior to the Liquidation Date.

Given the above, the Adviser may begin positioning the portfolio of the Fund to meet anticipated redemptions and ultimate liquidation, which may cause the Fund to deviate from its stated investment objective and strategies. It is anticipated that the Fund's portfolio will be entirely positioned in cash or cash equivalents at some time prior to the Liquidation Date. The Adviser also anticipates that, in the short term, it, and its affiliates, will continue to waive and/or reimburse certain Fund fees and expenses to maintain the Fund's yield at a level similar to the yield of the Fund over recent periods.

Each investor in the Fund should consult with their tax advisor regarding whether the liquidation of the Fund will be a tax recognition event for the investor and regarding any other tax consequences of this liquidation.

May 20, 2013

Federated Alabama Municipal Cash Trust
Federated Investors Funds
4000 Ericsson Drive
Warrendale, PA 15086-7561

Federated Securities Corp., Distributor

Q451683 (5/13)