Form 485BXT LORD ABBETT SECURITIES

As filed with the U.S. Securities and Exchange Commission on July 7, 2022

Securities Act File No. 033-58846

Investment Company Act File No. 811-07538

UNITED STATES
SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM N-1A

LORD ABBETT SECURITIES TRUST

(Exact Name of Registrant as Specified in Charter)

90 Hudson Street, Jersey City, New Jersey  07302-3973
(Address of Principal Executive Office)  (Zip Code)

Registrant's Telephone Number, including Area Code: (888) 522-2388

Lawrence B. Stoller
Vice President, Secretary, and Chief Legal Officer
90 Hudson Street, Jersey City, New Jersey 07302-3973
(Name and Address of Agent for Service)

It is proposed that this filing will become effective (check appropriate box):

___ immediately upon filing pursuant to paragraph (b)

X on July 18, 2022 pursuant to paragraph (b)

___ 60 days after filing pursuant to paragraph (a)(1)

___ on (date) pursuant to paragraph (a)(1)

___ 75 days after filing pursuant to paragraph (a)(2)

___ on (date) pursuant to paragraph (a)(2) of Rule 485

If appropriate, check the following box:

X This post-effective amendment designates a new effective date for a previously filed post-effective amendment.

EXPLANATORY NOTE

This Post-Effective Amendment No. 175 to the Registrant’s Registration Statement on Form N-1A is being filed pursuant to paragraph (b)(1)(iii) of Rule 485 under the Securities Act of 1933, as amended (the “Securities Act”), solely for the purpose of delaying, until July 18, 2022, the effectiveness of the registration statement for Lord Abbett Global Equity Fund (the “Fund”) filed in Post-Effective Amendment No. 170, which was filed on April 8, 2022 pursuant to paragraph (a) of Rule 485 under the Securities Act. This Post-Effective Amendment No. 175 incorporates by reference the information relating to the Fund contained in Parts A, B, and C of Post-Effective Amendment No. 170. Post-Effective Amendment No. 175 is not intended to amend or supersede information contained in Post-Effective Amendment No. 170, or otherwise affect the effectiveness of any prospectus or statement of additional information contained in Post-Effective Amendment No. 170 that relates to one or more other series of the Registrant.

This filing relates solely to Lord Abbett Global Equity Fund. No information contained herein is intended to amend or supersede any prior filing relating to any other series of the Registrant.

SIGNATURES

Pursuant to the requirements of the Securities Act of 1933, as amended, and the Investment Company Act of 1940, as amended, the Registrant certifies that it meets all of the requirements for effectiveness of this Registration Statement under Rule 485(b) under the Securities Act of 1933, as amended, and has duly caused this Registration Statement to be signed on its behalf by the undersigned, duly authorized, in the City of Jersey City, and State of New Jersey on the 7^th day of July 2022.

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