Deutsche Investment Management Americas Inc.

 One Beacon Street

 Boston, MA 02108

 October 4, 2016

Securities and Exchange Commission

100 F Street, N.E.

Washington, DC 20549

RE: Deutsche Enhanced Commodity Strategy Fund, Deutsche Health and Wellness Fund and Deutsche CROCI® Sector Opportunities Fund (collectively, the “Funds”), each a series of Deutsche Securities Trust (the “Trust”) (Reg. Nos. 002-36238; 811-02021)

Ladies and Gentlemen:

Pursuant to Rule 497(j) under the Securities Act of 1933, as amended, the Trust hereby certifies that the form of Prospectuses and Statements of Additional Information that would have been filed on behalf of the Funds pursuant to Rule 497(c) upon the effectiveness of Post-Effective Amendment No. 162 to the Trust’s Registration Statement on Form N-1A (the “Amendment”) would not have differed from that contained in the Amendment, which is the most recent amendment to such Registration Statement relating to the Funds and was filed electronically on September 28, 2016.

Any comments or questions on this filing should be directed to the undersigned at (617) 295-3681.

Very truly yours,

 /s/ Laura McCollum

 Laura McCollum

Vice President

 Deutsche Investment Management Americas Inc.

cc: John Marten, Esq., Vedder Price P.C.