UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

SCHEDULE 14A

(Rule 14a-101)

INFORMATION REQUIRED IN PROXY STATEMENT

SCHEDULE 14A INFORMATION

Proxy Statement Pursuant to Section 14(a) of the Securities

Exchange Act of 1934 (Amendment No.          )

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Check the appropriate box:

[  ] Preliminary Proxy Statement

[  ] Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2))

[  ]Definitive Proxy Statement

[X] Definitive Additional Materials

[  ] Soliciting Material Pursuant to §240.14a-12

CASH RESERVE FUND, INC.

(Name of Registrant as Specified in Its Charter)

Payment of Filing Fee (Check the appropriate box):

[X] No fee required.

[  ] Fee computed on table below per Exchange Act Rules 14a-6(i)(4) and 0-11.

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[  ] Fee paid previously with preliminary materials.

[  ] Check box if any part of the fee is offset as provided by Exchange Act Rule 0-11(a)(2) and identify the filing for which the offsetting fee was paid previously. Identify the previous filing by registration statement number, or the Form or Schedule and the date of its filing.

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DWS MONEY MARKET TRUST

Cash Management Fund

Cash Reserves Fund Institutional

Deutsche Money Market Series

CASH RESERVE FUND, INC.

Prime Series

Special Meeting of Shareholders to be held on

December 21, 2015

Urgent Request   PLEASE SUBMIT YOUR VOTE TODAY!     Dear Shareholder:   A Special Meeting of Shareholders is scheduled for December 21, 2015 at 2:00 p.m. (Eastern time), at the offices of Deutsche Investment Management Americas Inc., 345 Park Avenue, New York, New York 10154. To date, our records indicate that we have not yet received your vote. If you have already voted, please disregard this notice and thank you.   For the reasons set forth in the proxy materials, your Fund’s Board of Trustees/Directors unanimously recommends that you vote "FOR" the proposal. Your vote is important no matter how many shares you own. We urge you to act promptly in order to allow us to obtain a sufficient number of votes to hold the meeting and avoid the cost of additional solicitation.   If you have any questions regarding the proposal, or need duplicate proxy materials, please contact Computershare Fund Services at 1-866-905-8143. Representatives are available Monday through Friday from 9:00 a.m. to 11:00 p.m. and Saturday from 12:00 p.m. to 6:00 p.m. (Eastern time). A copy of the proxy statement is also available on Computershare’s website at www.proxy-direct.com/deu-27106.                 For your convenience, please utilize any of the following methods to submit your vote:   1. By Internet. Log on to the website noted on your proxy card(s) or voting instruction form, enter the control number printed on the voting card(s), and follow the simple online instructions.   2. By Touch-Tone Phone. Call the toll-free number found on your voting card(s) or voting instruction form, and follow the simple instructions.   3. By Speaking to a Proxy Specialist. Call 1-866-905-8143 to speak to a live proxy specialist. We can answer your questions and record your vote.   4. By Mail. Simply return your signed and dated voting card(s) or voting instruction form in the envelope provided.     Please try to utilize one of the options above to vote your shares, so your vote can be received in time for the meeting.  

YOUR VOTE IS VERY IMPORTANT. PLEASE VOTE YOUR SHARES TODAY!

R1 – 27106 /S37505