LORD ABBETT AFFILIATED FUND
LORD ABBETT DEVELOPING GROWTH FUND
LORD ABBETT MID CAP STOCK FUND
LORD ABBETT RESEARCH FUND
Lord Abbett Dividend Growth Fund
Lord Abbett Growth
Opportunities Fund
Lord Abbett Small Cap Value Fund
LORD ABBETT SECURITIES TRUST
Lord Abbett Focused Growth Fund
Lord Abbett Fundamental Equity Fund
Lord Abbett Growth Leaders Fund
Lord Abbett Micro Cap Growth Fund
Lord Abbett Value Opportunities Fund
LORD ABBETT SERIES FUND
Lord Abbett Developing Growth Portfolio
Lord Abbett Dividend Growth Portfolio
Lord Abbett Fundamental Equity Portfolio
Lord Abbett Growth and Income Portfolio
Lord Abbett Growth Opportunities Portfolio
Lord Abbett Mid Cap Stock Port
folio
Supplement dated
February
10
,
2025
to
all currently effective
Summary
Prospectus
es
and
Prospectus
es
for the aforementioned Funds
Effective
February
10
,
2025,
the Principal Investment Strategies for each Fund listed above will be revised as follows
.
Please review this important
information
carefully.
The
first
sentence
of
the fourth paragraph under
the
section
titled
“More Information About the Funds
–
Principal Investment Strategies”
relating to
the
Lord Abbett Fundamental Equity Fund
,
Lord Abbett
Fundamental Equity Portfolio, and
Lord Abbett Mic
r
o Cap Growth Fund
will
be
replaced
with
the
following:
The Fund may invest up to 20% of its net assets in securities of foreign companies, including emerging market
companies,
ADRs, Global Depositary Receip
ts (“GDRs”), and other similar depositary receipts.
The
first
sentence
of
the
third
paragraph
under
the
section
titled
“More Information About the Funds
–
Principal Investment Strategies”
for
each
of the remaining
Fund’s
will
be
replaced
with
the
following:
The Fund may invest up to 20% of its net assets in securities of foreign companies, including emerging market
companies,
ADRs, Global Depositary Receipts (“GDRs”), and other similar depositary receipts.
Corresponding changes will be made in the
Fund Summary section for each Fund.
Capitalized terms used in this Supplement shall, unless otherwise defined herein, have the same meaning as given
in the Prospectus.
Please retain this document for your future reference.
SUMMARY PROSPECTUS
Lord Abbett Developing Growth Fund
DECEMBER 1, 2024
CLASS/TICKER
CLASS A ............
LAGWX
CLASS I...........
LADYX
CLASS R4 .......
LADSX
CLASS C............
LADCX
CLASS P .........
LADPX
CLASS R5 .......
LADTX
CLASS F ............
LADFX
CLASS R2 .......
LADQX
CLASS R6 .......
LADVX
CLASS F3 ..........
LOGWX
CLASS R3 .......
LADRX
Before you invest, you may want to review the Fund’s prospectus and statement of additional
information, which contain more information about the Fund and its risks. You can find the
Fund’s prospectus, statement of additional information and other information about the Fund at
www.lordabbett.com/documentsandliterature. You can also get this information at no cost by
calling 888-522-2388 (Option #2) or by sending an email request to literature@lordabbett.com.
The current prospectus and statement of additional information dated December 1, 2024 as may
be supplemented from time to time, are incorporated by reference into this summary prospectus.