Exhibit 99.(j)

CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

We consent to the incorporation by reference in this Post-Effective Amendment to Registration Statement No. 033-58846 on Form N-1A of our report dated December 20, 2024, relating to the financial statements and financial highlights of Lord Abbett Alpha Strategy Fund, Lord Abbett Focused Growth Fund, Lord Abbett Focused Large Cap Value Fund, Lord Abbett Focused Small Cap Value Fund, Lord Abbett Fundamental Equity Fund, Lord Abbett Global Equity Fund, Lord Abbett Growth Leaders Fund, Lord Abbett Health Care Fund, Lord Abbett International Equity Fund, Lord Abbett International Opportunities Fund, Lord Abbett International Value Fund, Lord Abbett Micro Cap Growth Fund, and Lord Abbett Value Opportunities Fund, each a series of Lord Abbett Securities Trust, appearing in Form N-CSR of Lord Abbett Securities Trust for the year ended October 31, 2024, and to the references to us under the headings “Financial Highlights” in the Prospectus and “Independent Registered Public Accounting Firm” and “Financial Statements” in the Statement of Additional Information, which are part of such Registration Statement.

/s/ Deloitte & Touche LLP

New York, New York

February 24, 2025