As filed with the U.S. Securities and Exchange Commission on March 25, 2022

Securities Act File No. 033-47641

Investment Company Act File No. 811-06650

UNITED STATES
SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM N-1A

LORD ABBETT RESEARCH FUND, INC.

(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

John T. Fitzgerald, Esq.
Vice President and Assistant Secretary
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 April 1, 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:

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

Dividend Growth Fund

INVESTMENT OBJECTIVE

The Fund’s investment objective is to seek current income and capital appreciation.

FEES AND EXPENSES

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Example

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Portfolio Turnover. The Fund pays transaction costs, such as commissions, when it buys and sells securities (or “turns over” its portfolio). A higher portfolio turnover rate may indicate higher transaction costs and may result in higher taxes when Fund shares are held in a taxable account. These costs, which are not reflected in the annual fund operating expenses or in the example, affect the Fund’s performance. During the most recent fiscal year, the Fund’s portfolio turnover rate was 39% of the average value of its portfolio.

PRINCIPAL INVESTMENT STRATEGIES

PRINCIPAL RISKS

PERFORMANCE

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MANAGEMENT

Investment Adviser. The Fund’s investment adviser is Lord, Abbett & Co. LLC (“Lord Abbett”).

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Portfolio Managers.

OTHER IMPORTANT INFORMATION REGARDING FUND SHARES

For important information about purchase and sale of Fund shares, taxes, and payments to broker-dealers and other financial intermediaries, please turn to the “Purchase and Sale of Fund Shares,” “Tax Information” and “Payments to Broker-Dealers and Other Financial Intermediaries” sections of the prospectus.

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Growth Opportunities Fund

INVESTMENT OBJECTIVE

The Fund’s investment objective is capital appreciation.

FEES AND EXPENSES

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Example

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Portfolio Turnover. The Fund pays transaction costs, such as commissions, when it buys and sells securities (or “turns over” its portfolio). A higher portfolio turnover rate may indicate higher transaction costs and may result in higher taxes when Fund shares are held in a taxable account. These costs, which are not reflected in the annual fund operating expenses or in the example, affect the Fund’s performance. During the most recent fiscal year, the Fund’s portfolio turnover rate was 68% of the average value of its portfolio.

PRINCIPAL INVESTMENT STRATEGIES

PRINCIPAL RISKS

PERFORMANCE

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MANAGEMENT

Investment Adviser. The Fund’s investment adviser is Lord Abbett.

Portfolio Managers.

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OTHER IMPORTANT INFORMATION REGARDING FUND SHARES

For important information about purchase and sale of Fund shares, taxes, and payments to broker-dealers and other financial intermediaries, please turn to the “Purchase and Sale of Fund Shares,” “Tax Information” and “Payments to Broker-Dealers and Other Financial Intermediaries” sections of the prospectus.

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Small Cap Value Fund

INVESTMENT OBJECTIVE

The Fund’s investment objective is long-term capital appreciation.

FEES AND EXPENSES

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Example

Portfolio Turnover. The Fund pays transaction costs, such as commissions, when it buys and sells securities (or “turns over” its portfolio). A higher portfolio turnover rate may indicate higher transaction costs and may result in higher taxes when Fund

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shares are held in a taxable account. These costs, which are not reflected in the annual fund operating expenses or in the example, affect the Fund’s performance. During the most recent fiscal year, the Fund’s portfolio turnover rate was 78% of the average value of its portfolio.

PRINCIPAL INVESTMENT STRATEGIES

PRINCIPAL RISKS

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PERFORMANCE

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MANAGEMENT

Investment Adviser. The Fund’s investment adviser is Lord, Abbett & Co. LLC (“Lord Abbett”).

Portfolio Managers.

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OTHER IMPORTANT INFORMATION REGARDING FUND SHARES

For important information about purchase and sale of Fund shares, taxes, and payments to broker-dealers and other financial intermediaries, please turn to the “Purchase and Sale of Fund Shares,” “Tax Information” and “Payments to Broker-Dealers and Other Financial Intermediaries” sections of the prospectus.

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PURCHASE AND SALE OF FUND SHARES

The minimum initial and additional amounts shown below vary depending on the class of shares you buy and the type of account. Certain financial intermediaries may impose different restrictions than those described below. For Class I shares, the minimum investment shown below applies to certain types of institutional investors, but does not apply to registered investment advisers or retirement and benefit plans otherwise eligible to invest in Class I shares. Class P shares are closed to substantially all new investors. See “Choosing a Share Class – Investment Minimums” in the prospectus for more information.

You may sell (redeem) shares through your securities broker, financial professional or financial intermediary on any business day the Fund calculates its net asset value (“NAV”). If you have direct account access privileges, you may redeem your shares by contacting the Fund in writing at P.O. Box 219336, Kansas City, MO 64121, by calling 888-522-2388 or by accessing your account online at www.lordabbett.com.

TAX INFORMATION

A Fund’s distributions, if any, generally are taxable to you as ordinary income, capital gains or a combination of the two, unless you are a tax-exempt investor or investing through a tax-advantaged arrangement, such as a 401(k) plan or an IRA. Any withdrawals from such a tax-advantaged arrangement may be taxable to you.

PAYMENTS TO BROKER-DEALERS AND OTHER FINANCIAL INTERMEDIARIES

If you purchase Fund shares through a broker-dealer or other financial intermediary (such as a bank), the Fund and the Fund’s distributor or its affiliates may pay the intermediary for the sale of Fund shares and related services. These payments may create a conflict of interest by influencing the broker-dealer or other financial

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intermediary and your individual financial professional to recommend the Fund over another investment. Ask your individual financial professional or visit your financial intermediary’s website for more information.

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INVESTMENT OBJECTIVES

Dividend Growth Fund

The Fund’s investment objective is to seek current income and capital appreciation.

Growth Opportunities Fund

The Fund’s investment objective is capital appreciation.

Small Cap Value Fund

The Fund’s investment objective is long-term capital appreciation.

PRINCIPAL INVESTMENT STRATEGIES

Dividend Growth Fund

The Fund invests in equity securities of large and mid-sized companies that the Fund’s portfolio management team believes have potential for long-term total return and consistent increases in their dividends over time resulting from their earnings growth. In particular, the Fund focuses on large and mid-sized companies that have a ten-year history of dividend issuance and growth, which represents a narrow investable universe. The Fund may invest in companies of any size, but expects to invest in companies having a market capitalization at the time of purchase of at least $500 million.

Equity securities in which the Fund may invest include common stocks, preferred stocks, equity interests in trusts (including REITs and privately offered trusts), partnerships, joint ventures, limited liability companies and vehicles with similar legal structures, and other instruments with similar economic characteristics. The Fund also considers equity securities to include warrants, rights offerings, convertible securities, and other investments that are convertible or exercisable into the equity securities described above.

The Fund may invest up to 10% of its net assets in securities of foreign companies, including emerging market companies, ADRs, Global Depositary Receipts (“GDRs”), and other similar depositary receipts. The Fund generally defines foreign companies as those whose securities are traded primarily on non-U.S. securities exchanges. Because ADRs represent exposure to foreign companies, the Fund deems them to be foreign investments even though they trade on U.S. exchanges. Foreign securities may be denominated in the U.S. dollar or other currencies. The Fund may invest without limitation in securities of companies that do not meet these criteria but represent economic exposure to foreign markets, including securities of companies that are organized or operated in a foreign country but primarily trade on a U.S. securities exchange.

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In selecting investments, the Fund’s portfolio management team considers the following:

· Dividend Growth. The portfolio management team seeks to invest in equity securities of established companies that the portfolio management team believes have the potential for long-term capital appreciation and consistent growth in dividends. Dividend-paying securities are securities issued by companies that pay out a portion of their profits to shareholders instead of reinvesting all their profits in their businesses. Companies which grow their dividends in a consistent manner show an ability to manage and grow their businesses through economic cycles. The portfolio management team believes the equity securities of these companies have the potential for investment return because they are often underpriced or undervalued according to certain financial measurements of intrinsic worth or business prospects. The Fund focuses on large and mid-sized companies that the portfolio management team identifies as having a ten-year history of dividend issuance and growth, but also may invest in companies not meeting these criteria.

· Fundamental Analysis. The Fund’s investment process analyzes various measures of a company’s financial condition. The Fund’s portfolio management team considers consensus expectations as well as proprietary fundamental analysis regarding near-term earnings, long-term normalized earnings, and earnings growth rates. In addition, the portfolio management team may consider other factors such as changes in economic and financial environment; new or improved products or services; changes in management or structure of the company; price increases for the company’s products or services; and improved efficiencies resulting from new technologies or changes in distribution.

· Quantitative Analysis. The Fund’s portfolio management team employs quantitative analysis, such as valuation and risk models and other quantitative analytical tools. The portfolio management team may do so to analyze the effects of various characteristics of the Fund’s overall portfolio and to assist in individual stock selection. Based on the portfolio management team’s assessment of these portfolio characteristics, the Fund may buy or sell securities as it seeks to optimize overall portfolio performance.

The investment team may also consider the risks and return potential presented by ESG factors in investment decisions.

The Fund may sell a security when the Fund believes the security is less likely to benefit from the current market and economic environment, shows signs of deteriorating fundamentals, no longer meets the Fund’s investment criteria, to increase cash, or to satisfy redemption requests, among other reasons. In considering whether to sell a security, the Fund may evaluate factors including, but not limited to, the condition of the economy, changes in the issuer’s competitive position or financial condition, changes in the outlook for the issuer’s industry, and the Fund’s valuation target for the security.

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Lord Abbett is registered with the U.S. Commodity Futures Trading Commission as a commodity pool operator (“CPO”) under the Commodity Exchange Act (“CEA”).  However, with respect to the Fund, Lord Abbett has filed a claim of exclusion from the definition of the term CPO and therefore, Lord Abbett is not subject to registration or regulation as a pool operator under the CEA.

Temporary Defensive Strategies. The Fund seeks to remain fully invested in accordance with its investment objective. However, in an attempt to respond to adverse market, economic, political, or other conditions, the Fund may take a temporary defensive position that is inconsistent with its principal investment strategies by holding some or all of its assets in short-term investments. These investments include cash, commercial paper, money market instruments, repurchase agreements, and U.S. Government securities. The Fund also may hold these types of investments while looking for suitable investment opportunities or to manage liquidity. Taking a temporary defensive position could prevent the Fund from achieving its investment objective.

Growth Opportunities Fund

The Fund invests in equity securities of mid-sized U.S. companies with growth characteristics. Under normal conditions, the Fund invests at least 65% of its net assets in equity securities of mid-sized companies. A mid-sized company is defined as a company having a market capitalization at the time of purchase that falls within the market capitalization range of companies in the Russell Midcap^® Index, a widely-used benchmark for mid-sized U.S. company stock performance. The market capitalization range of the Russell Midcap^® Index as of June 30, 2021, following its most recent annual reconstitution, was approximately $3.1 billion to $61 billion. This range varies daily.

Equity securities in which the Fund may invest include common stocks, preferred stocks, equity interests in trusts (including REITs) and privately offered trusts), partnerships, joint ventures, limited liability companies and vehicles with similar legal structures, and other instruments with similar economic characteristics. The Fund also considers equity securities to include warrants, rights offerings, convertible securities, and other investments that are convertible or exercisable into the equity securities described above.

The Fund may invest up to 10% of its net assets in securities of foreign companies, including emerging market companies, ADRs, GDRs, and other similar depositary receipts. The Fund generally defines foreign companies as those whose securities are traded primarily on non-U.S. securities exchanges. Because ADRs represent exposure to foreign companies, the Fund deems them to be foreign investments even though they trade on U.S. exchanges. Foreign securities may be denominated in the U.S. dollar or other currencies. The Fund may invest without limitation in securities of companies that do not meet these criteria but represent economic exposure to foreign markets, including securities of companies that are organized or operated in a foreign country but primarily trade on a U.S. securities exchange.

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The Fund’s portfolio management team follows a growth style of investing and seeks to identify companies that show the potential for strong revenue and earnings growth. The portfolio management team uses fundamental research to identify companies it believes are likely to produce superior returns over a two- to five-year period, by analyzing the dynamics in each company within its industry and within the overall economy, and quantitative research to identify companies that it believes have superior growth potential. The investment team may also consider the risks and return potential presented by ESG factors in investment decisions.

The Fund may sell a security when the Fund believes the security is less likely to benefit from the current market and economic environment, shows signs of deteriorating fundamentals, no longer meets the Fund’s investment criteria, to increase cash, or to satisfy redemption requests, among other reasons. In considering whether to sell a security, the Fund may evaluate factors including, but not limited to, the condition of the economy, changes in the issuer’s competitive position or financial condition, changes in the outlook for the issuer’s industry, and the Fund’s valuation target for the security.

Lord Abbett is registered with the U.S. Commodity Futures Trading Commission as a CPO under the CEA.  However, with respect to the Fund, Lord Abbett has filed a claim of exclusion from the definition of the term CPO and therefore, Lord Abbett is not subject to registration or regulation as a pool operator under the CEA.

Temporary Defensive Strategies. The Fund seeks to remain fully invested in accordance with its investment objective. However, in an attempt to respond to adverse market, economic, political, or other conditions, the Fund may take a temporary defensive position that is inconsistent with its principal investment strategies by holding some or all of its assets in short-term investments. These investments include cash, commercial paper, money market instruments, repurchase agreements, and U.S. Government securities. The Fund also may hold these types of investments while looking for suitable investment opportunities or to manage liquidity. Taking a temporary defensive position could prevent the Fund from achieving its investment objective.

Small Cap Value Fund

The Fund invests in equity securities of small companies that the portfolio management team believes are undervalued by the market and are selling at reasonable prices in relation to the portfolio management team’s assessment of their potential or intrinsic value. Under normal circumstances, the Fund invests at least 80% of its net assets, plus the amount of any borrowings for investment purposes, in equity securities of small companies. The Fund will provide shareholders with at least 60 days’ notice of a change in this policy. A small company is defined as a company having a market capitalization at the time of purchase that falls within the market capitalization range of companies in the Russell 2000^® Index, a widely-used benchmark for small U.S. company stock performance. The market capitalization range of the Russell 2000^® Index as of June 30, 2021, following its most recent

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annual reconstitution, was approximately $172 million to $26 billion. This range varies daily.

Equity securities in which the Fund may invest include common stocks, preferred stocks, equity interests in trusts (including REITs) and privately offered trusts), partnerships, joint ventures, limited liability companies and vehicles with similar legal structures, and other instruments with similar economic characteristics. The Fund also considers equity securities to include warrants, rights offerings, convertible securities, and other investments that are convertible or exercisable into the equity securities described above.

The Fund may invest up to 10% of its net assets in securities of foreign companies, including emerging market companies, ADRs, GDRs, and other similar depositary receipts. The Fund generally defines foreign companies as those whose securities are traded primarily on non-U.S. securities exchanges. Because ADRs represent exposure to foreign companies, the Fund deems them to be foreign investments even though they trade on U.S. exchanges. Foreign securities may be denominated in the U.S. dollar or other currencies. The Fund may invest without limitation in securities of companies that do not meet these criteria but represent economic exposure to foreign markets, including securities of companies that are organized or operated in a foreign country but primarily trade on a U.S. securities exchange.

The Fund seeks to invest in securities of companies that the portfolio management team believes are undervalued by the market and are selling at reasonable prices in relation to the portfolio management team’s assessment of their potential or intrinsic value. A security may be undervalued by the market because of a lack of awareness of the company’s intrinsic value or a lack of recognition of the company’s future potential. In addition, a security may be undervalued because it may be temporarily out of favor by the market.

The Fund’s portfolio management team selects securities by, among other things, employing quantitative screening and fundamental research. The quantitative screening process identifies a group of companies for potential investment. The portfolio management team then conducts rigorous fundamental research on those companies with a focus on the long-term outlook of their businesses. The investment team may also consider the risks and return potential presented by ESG factors in investment decisions.

The Fund may sell a security when the Fund believes the security is less likely to benefit from the current market and economic environment, shows signs of deteriorating fundamentals, no longer meets the Fund’s investment criteria, to increase cash, or to satisfy redemption requests, among other reasons. In considering whether to sell a security, the Fund may evaluate factors including, but not limited to, the condition of the economy, changes in the issuer’s competitive position or financial condition, changes in the outlook for the issuer’s industry, and the Fund’s valuation target for the security.

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Lord Abbett is registered with the U.S. Commodity Futures Trading Commission as a CPO under the CEA.  However, with respect to the Fund, Lord Abbett has filed a claim of exclusion from the definition of the term CPO and therefore, Lord Abbett is not subject to registration or regulation as a pool operator under the CEA.

Temporary Defensive Strategies. The Fund seeks to remain fully invested in accordance with its investment objective. However, in an attempt to respond to adverse market, economic, political, or other conditions, the Fund may take a temporary defensive position that is inconsistent with its principal investment strategies by holding some or all of its assets in short-term investments. These investments include cash, commercial paper, money market instruments, repurchase agreements, and U.S. Government securities. The Fund also may hold these types of investments while looking for suitable investment opportunities or to manage liquidity. Taking a temporary defensive position could prevent the Fund from achieving its investment objective.

PRINCIPAL RISKS

As with any investment in a mutual fund, investing in a Fund involves risk, including the risk that you may receive little or no return on your investment. When you redeem your shares, they may be worth more or less than what you paid for them, which means that you may lose a portion or all of the money you invested in a Fund. Before you invest in a Fund, you should carefully evaluate the risks in light of your investment goals. An investment in a Fund held for longer periods over full market cycles typically provides more favorable results.

The principal risks you assume when investing in each Fund are described below. The Funds attempt to manage these risks through careful security selection, portfolio diversification, and continual portfolio review and analysis, but there can be no assurance or guarantee that these strategies will be successful in reducing risk. Please see the SAI for a further discussion of strategies employed by each Fund and the risks associated with an investment in the Fund.

All Funds

· Portfolio Management Risk: The strategies used and investments selected by the Fund’s portfolio management team may fail to produce the intended result and the Fund may not achieve its objective. The securities selected for the Fund may not perform as well as other securities that were not selected for the Fund. As a result, the Fund may suffer losses or underperform other funds with the same investment objective or strategies, and may generate losses even in a favorable market.

· Market Risk: The market values of securities will fluctuate, sometimes sharply and unpredictably, based on overall economic conditions, governmental actions or intervention, market disruptions caused by trade disputes or other factors, political developments, and other factors. Changes in the financial condition of a single issuer can impact a market as a whole. In addition, data imprecision, technology malfunctions, operational errors, and similar factors may adversely

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affect a single issuer, a group of issuers, an industry, or the market as a whole. Prices of equity securities tend to rise and fall more dramatically than those of debt securities. A slower-growth or recessionary economic environment could have an adverse effect on the prices of the various securities held by the Fund. Economies and financial markets throughout the world are becoming increasingly interconnected, which raises the likelihood that events or conditions in one country or region will adversely affect markets or issuers in other countries or regions.

· Equity Securities Risk: Investments in equity securities represent ownership in a company that fluctuates in value with changes in the company’s financial condition. Stock markets may experience significant volatility at times and may fall sharply in response to adverse events. Certain segments of the stock market may react differently than other segments and U.S. markets may react differently than foreign markets. Individual stock prices also may experience dramatic movements in price. Price movements may result from factors affecting individual companies, sectors, or industries selected for the Fund’s portfolio or the securities market as a whole, including periods of slower growth or recessionary economic conditions, future expectations of poor economic conditions, changes in political or social conditions, and lack of investor confidence. In addition, individual stocks may be adversely affected by factors such as reduced sales, increased costs, or a negative outlook for the future performance of the company. As compared with preferred stock and debt, common stock generally involves greater risk and has lower priority when liquidation, bankruptcy, and dividend payments are made. Preferred stock may be subordinated to bonds or other debt instruments in a company’s capital structure and is typically less liquid than common stock. Because convertible securities have certain features that are common to fixed-income securities and may be exchanged for common stock, they are subject to the risks affecting both equity and fixed income securities, including market, credit and interest rate risk.

· Industry and Sector Risk: Although the Fund does not employ an industry or sector focus, the percentage of the Fund’s assets invested in specific industries or sectors will increase from time to time based on the portfolio management team’s perception of investment opportunities. The Fund may be overweight in certain industries and sectors at various times relative to its benchmark index. If the Fund invests a significant portion of its assets in a particular industry or sector, the Fund is subject to the risk that companies in the same industry or sector are likely to react similarly to legislative or regulatory changes, adverse market conditions, increased competition, or other factors generally affecting that market segment. In such cases, the Fund would be exposed to an increased risk that the value of its overall portfolio will decrease because of events that disproportionately affect certain industries and/or sectors. The industries and sectors in which the Fund may be overweighted will vary. Furthermore, investments in particular industries or sectors may be more volatile than the

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broader market as a whole, and the Fund’s investments in these industries and sectors may be disproportionately susceptible to losses even if not overweighted.

· Foreign and Emerging Market Company Risk: Investments in foreign (including emerging market) companies and in U.S. companies with economic ties to foreign markets generally involve special risks that can increase the likelihood that the Fund will lose money. For example, as compared with companies organized and operated in the U.S., these companies may be more vulnerable to economic, political, and social instability and subject to less government supervision, lack of transparency, inadequate regulatory and accounting standards, and foreign taxes. In addition, the securities of foreign companies also may be subject to inadequate exchange control regulations (including limitations on currency movements and exchanges), the imposition of economic sanctions or other government restrictions, higher transaction and other costs, and delays in settlement to the extent they are traded on non-U.S. exchanges or markets. Investments in foreign companies also may be adversely affected by governmental actions such as the nationalization of companies or industries, expropriation of assets, or confiscatory taxation. Foreign company securities also include ADRs, GDRs, and other similar depositary receipts. ADRs, GDRs, and other similar depositary receipts may be less liquid than the underlying shares in their primary trading market.

Foreign company securities also may be subject to thin trading volumes and reduced liquidity, which may lead to greater price fluctuation. A change in the value of a foreign currency relative to the U.S. dollar will change the value of securities held by the Fund that are denominated in that foreign currency, including the value of any income distributions payable to the Fund as a holder of such securities. Currency exchange rates may fluctuate significantly over short periods of time for a number of reasons, including changes in interest rates and the overall economic health of the issuer. Devaluation of a currency by a country’s government or banking authority also will have an adverse impact on the U.S. dollar value of any investments denominated in that currency. These and other factors can materially adversely affect the prices of securities the Fund holds, impair the Fund’s ability to buy or sell securities at their desired price or time, or otherwise adversely affect the Fund’s operations. The Fund may invest in securities of issuers, including emerging market issuers, whose economic fortunes are linked to non-U.S. markets, but which principally are traded on a U.S. securities market or exchange and denominated in U.S. dollars. To the extent the Fund invests in this manner, the percentage of the Fund’s assets that is exposed to the risks associated with foreign companies may exceed the percentage of the Fund’s assets that is invested in foreign securities that are principally traded outside of the U.S.

The Fund’s investments in emerging market companies generally are subject to heightened risks compared to its investments in developed market companies. Investments with economic exposure to emerging markets may be considered

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speculative and generally are riskier than investments in more developed markets because such markets tend to develop unevenly and may never fully develop. Emerging markets are more likely to experience hyperinflation and currency devaluations. Securities of emerging market companies may have far lower trading volumes, tend to be less liquid, subject to greater price volatility, have a smaller market capitalization, have less government regulation and may not be subject to as extensive and frequent accounting, financial and other reporting requirements as securities issued in more developed countries. Further, investing in the securities of issuers with economic exposure to emerging countries may present a greater risk of loss resulting from problems in security registration and custody or substantial economic or political disruptions. The Fund may invest in securities of companies whose economic fortunes are linked to emerging markets but which principally are traded on a non-emerging market exchange. Such investments do not meet the Fund’s definition of an emerging market security. To the extent the Fund invests in this manner, the percentage of the Fund’s portfolio that is exposed to emerging market risks may be greater than the percentage of the Fund’s assets that the Fund defines as representing emerging market securities.

· Foreign Currency Risk: Investments in securities that are denominated or receiving revenues in foreign currencies are subject to the risk that those currencies will decline in value relative to the U.S. dollar, or, in the case of hedged positions, that the U.S. dollar will decline in value relative to the currency being hedged. Foreign currency exchange rates may fluctuate significantly over short periods of time. A decline in the value of foreign currencies relative to the U.S. dollar will reduce the value of securities that are denominated in those currencies. The Fund may engage in foreign currency hedging transactions to attempt to protect the Fund from adverse currency movements. Such transactions include the risk that Lord Abbett will not accurately predict currency movements. As a result, the Fund may experience significant losses or see its return reduced. Also, it may be difficult or impractical to hedge currency risk in many developing or emerging markets. The risks associated with exposure to emerging market currencies may be heightened in comparison to those associated with exposure to developed market currencies.

· Liquidity/Redemption Risk: The Fund may lose money when selling securities at inopportune times to fulfill shareholder redemption requests. The risk of loss may increase depending on the size and frequency of redemption requests, whether the redemption requests occur in times of overall market turmoil or declining prices, and whether the securities the Fund intends to sell have decreased in value or are illiquid. The Fund may be less able to sell illiquid securities at its desired time or price. It may be more difficult for the Fund to value its investments in illiquid securities than more liquid securities. Illiquidity can be caused by a variety of factors, including economic conditions, market events, events relating to the issuer of the securities, a drop in overall market

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trading volume, an inability to find a ready buyer, or legal restrictions on the securities’ resale. Certain securities that are liquid when purchased may later become illiquid, particularly in times of overall economic distress. Liquidity risk may be magnified in circumstances where investor redemptions from the mutual funds may be higher than normal, causing increased supply in the market due to selling activity.

Dividend Growth Fund

· Investment Strategy Risk: The strategies used and securities selected by the Fund’s portfolio management team may fail to produce the intended result and the Fund may not achieve its objective. Through the integration of fundamental research and quantitative analysis, the Fund expects that stock selection is likely to be a primary driver of the Fund’s performance relative to its benchmark index. In addition, there is no guarantee that the Fund’s use of quantitative analytic tools will be successful. Factors that affect a security’s value can change over time and these changes may not be reflected in the Fund’s quantitative models. Investments selected using these models may perform differently than expected as a result of the factors used in the models, the weight placed on each factor, changes from the factors’ historical trends, and technical issues in the construction and implementation of the models. In addition, the Fund’s performance will reflect, in part, the Fund’s portfolio management team’s ability to make active qualitative decisions and timely adjust the quantitative models, including the models’ underlying metrics and data. As a result of the risks associated with the Fund’s investment strategies, the Fund may underperform its benchmark or other funds with the same investment objective and which invest in large and mid-sized companies, even in a favorable market. The Fund’s strategy of focusing on dividend-paying companies means the Fund will be more exposed to risks associated with that particular market segment than a fund that invests more widely.

· Dividend Risk: Depending on market conditions, securities of dividend-paying companies that meet the Fund’s investment criteria may not be widely available. At times, the performance of dividend-paying companies may lag the performance of other companies or the broader market as a whole. In addition, the dividend payments of the Fund’s portfolio companies may vary over time, and there is no guarantee that a company will pay a dividend at all. The reduction or elimination of dividends in the stock market as a whole may limit the Fund’s ability to produce current income. If dividend-paying companies are highly concentrated in only a few market sectors, then the Fund’s portfolio may become less diversified, and the Fund’s return may become more volatile.

· Large Company Risk: Larger, more established companies may be less able to respond quickly to certain market developments. In addition, larger companies may have slower rates of growth as compared to successful, but less well-established, smaller companies, especially during market cycles corresponding to periods of economic expansion. Large companies also may fall out of favor

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relative to smaller companies in certain market cycles, causing the Fund to incur losses or underperform.

· Mid-Sized Company Risk: Investments in mid-sized companies may involve greater risks than investments in larger, more established companies. As compared to larger companies, mid-sized companies may have limited management experience or depth, limited ability to generate or borrow capital needed for growth, and limited products or services, or operate in less established markets. Accordingly, securities of mid-sized companies tend to be more sensitive to changing economic, market, and industry conditions and tend to be more volatile and less liquid than equity securities of larger companies, especially over the short term. The securities of mid-sized companies tend to trade less frequently than those of larger, more established companies, which can adversely affect the pricing of these securities and the ability to sell these securities in the future. Mid-sized companies also may fall out of favor relative to larger companies in certain market cycles, causing the Fund to incur losses or underperform.

· Value Investing Risk: The prices of value stocks may lag the stock market for long periods of time if the market fails to recognize the company’s intrinsic worth. Value investing also is subject to the risk that a company judged to be undervalued may actually be appropriately priced or even overpriced. In addition, different investment styles may shift in and out of favor, depending on market and economic conditions as well as investor sentiment, which may cause the Fund to underperform other funds that employ a different or more diversified style.

· Growth Investing Risk: Growth stocks typically trade at higher multiples of current earnings as compared to other stocks, which may lead to inflated prices. Growth stocks often are more sensitive to market fluctuations than other securities because their market prices are highly sensitive to future earnings expectations. At times when it appears that these expectations may not be met, growth stocks’ prices typically fall. Growth stocks are subject to potentially greater declines in value if, among other things, the stock is subject to significant investor speculation but fails to increase as anticipated. In addition, different investment styles may shift in and out of favor, depending on market and economic conditions as well as investor sentiment, which may cause the Fund to underperform other funds that employ a different or more diversified style. During periods when growth investing is out of favor or when markets are unstable, selling growth stocks at a desired price may be more difficult. Growth stocks may be more volatile than securities of slower-growing issuers.

Growth Opportunities Fund

· Mid-Sized Company Risk: Investments in mid-sized companies may involve greater risks than investments in larger, more established companies. As compared to larger companies, mid-sized companies may have limited management experience or depth, limited ability to generate or borrow capital

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needed for growth, and limited products or services, or operate in less established markets. Accordingly, securities of mid-sized companies tend to be more sensitive to changing economic, market, and industry conditions and tend to be more volatile and less liquid than equity securities of larger companies, especially over the short term. The securities of mid-sized companies tend to trade less frequently than those of larger, more established companies, which can adversely affect the pricing of these securities and the ability to sell these securities in the future. Mid-sized companies also may fall out of favor relative to larger companies in certain market cycles, causing the Fund to incur losses or underperform.

· Growth Investing Risk: Growth stocks typically trade at higher multiples of current earnings as compared to other stocks, which may lead to inflated prices. Growth stocks often are more sensitive to market fluctuations than other securities because their market prices are highly sensitive to future earnings expectations. At times when it appears that these expectations may not be met, growth stocks’ prices typically fall. Growth stocks are subject to potentially greater declines in value if, among other things, the stock is subject to significant investor speculation but fails to increase as anticipated. In addition, different investment styles may shift in and out of favor, depending on market and economic conditions as well as investor sentiment, which may cause the Fund to underperform other funds that employ a different or more diversified style. During periods when growth investing is out of favor or when markets are unstable, selling growth stocks at a desired price may be more difficult. Growth stocks may be more volatile than securities of slower-growing issuers.

· Real Estate Risk: An investment in a REIT generally is subject to the risks that impact the value of the underlying properties or mortgages of the REIT. These risks include loss to casualty or condemnation, and changes in supply and demand, interest rates, zoning laws, regulatory limitations on rents, property taxes and operating expenses. Other factors that may adversely affect REITs include poor performance by management of the REIT, extended vacancies, failure to collect rents, the ability of the company to finance property purchases and renovations, changes to the tax laws, failure by the REIT to qualify for favorable tax treatment under the Code, and changes in local, regional, or general economic conditions. REITs also are subject to default or prepayments by borrowers and self-liquidation, and are heavily dependent on cash flow. Some REITs lack diversification because they invest in a limited number of properties, a narrow geographic area, or a single type of property. Mortgage REITs may be impacted by the quality of the credit extended. REITs may be more volatile and/or more illiquid than other types of equity securities. In addition, the Fund’s shareholders will indirectly bear their proportionate share of the REIT’s fees and expenses, as well as their proportionate share of the Fund’s fees and expenses.

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Small Cap Value Fund

· Value Investing Risk: The prices of value stocks may lag the stock market for long periods of time if the market fails to recognize the company’s intrinsic worth. Value investing also is subject to the risk that a company judged to be undervalued may actually be appropriately priced or even overpriced. In addition, different investment styles may shift in and out of favor, depending on market and economic conditions as well as investor sentiment, which may cause the Fund to underperform other funds that employ a different or more diversified style.

· Real Estate Risk: An investment in a REIT generally is subject to the risks that impact the value of the underlying properties or mortgages of the REIT. These risks include loss to casualty or condemnation, and changes in supply and demand, interest rates, zoning laws, regulatory limitations on rents, property taxes and operating expenses. Other factors that may adversely affect REITs include poor performance by management of the REIT, extended vacancies, failure to collect rents, the ability of the company to finance property purchases and renovations, changes to the tax laws, failure by the REIT to qualify for favorable tax treatment under the Code, and changes in local, regional, or general economic conditions. REITs also are subject to default or prepayments by borrowers and self-liquidation, and are heavily dependent on cash flow. Some REITs lack diversification because they invest in a limited number of properties, a narrow geographic area, or a single type of property. Mortgage REITs may be impacted by the quality of the credit extended. REITs may be more volatile and/or more illiquid than other types of equity securities. In addition, the Fund’s shareholders will indirectly bear their proportionate share of the REIT’s fees and expenses, as well as their proportionate share of the Fund’s fees and expenses.

· Small Company Risk: Investments in small companies may involve greater risks than investments in larger, more established companies. As compared to larger companies, small companies may have limited management experience or depth, limited ability to generate or borrow capital needed for growth, and limited products or services, or operate in less established markets. Accordingly, securities of small companies tend to be more sensitive to changing economic, market, and industry conditions and tend to be more volatile and less liquid than equity securities of larger companies, especially over the short term. The securities of small companies tend to trade less frequently than those of larger, more established companies, which can adversely affect the pricing of these securities and the ability to sell these securities in the future. Small companies also may fall out of favor relative to larger companies in certain market cycles, causing the Fund to incur losses or underperform.

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ADDITIONAL OPERATIONAL RISKS

In addition to the principal investment risks described above, the Fund also may be subject to certain operational risks, including:

· Cyber Security Risk: As the use of technology has become more prevalent in the course of business, Lord Abbett and other service providers have become more susceptible to operational and information security risks. Cyber incidents can result from deliberate attacks or unintentional events and include, but are not limited to, gaining unauthorized access to electronic systems for purposes of misappropriating assets, personally identifiable information (“PII”) or proprietary information (e.g., trading models and algorithms), corrupting data, or causing operational disruption, for example, by compromising trading systems or accounting platforms. Other ways in which the business operations of Lord Abbett, other service providers, or issuers of securities in which Lord Abbett invests a shareholder’s assets may be impacted include interference with a shareholder’s ability to value its portfolio, the unauthorized release of PII or confidential information, and violations of applicable privacy, recordkeeping and other laws. A shareholder and/or its account could be negatively impacted as a result.

While Lord Abbett has established internal risk management security protocols designed to identify, protect against, detect, respond to and recover from cyber security incidents, there are inherent limitations in such protocols including the possibility that certain threats and vulnerabilities have not been identified or made public due to the evolving nature of cyber security threats. Furthermore, Lord Abbett cannot control the cyber security systems of third party service providers or issuers. There currently is no insurance policy available to cover all of the potential risks associated with cyber incidents. Unless specifically agreed by Lord Abbett separately or required by law, Lord Abbett is not a guarantor against, or obligor for, any damages resulting from a cyber security-related incident.

· Large Shareholder Risk: To the extent a large number of shares of the Fund is held by a single shareholder or group of related shareholders (e.g., an institutional investor, another Lord Abbett Fund or multiple accounts advised by a common adviser) or a group of shareholders with a common investment strategy, the Fund is subject to the risk that a redemption by those shareholders of all or a large portion of their Fund shares will adversely affect the Fund’s performance by forcing the Fund to sell portfolio securities, potentially at disadvantageous prices, to raise the cash needed to satisfy the redemption request. In addition, the funds and other accounts over which Lord Abbett has investment discretion that invest in the Fund may not be limited in how often they may purchase or sell Fund shares. Certain Lord Abbett Funds or accounts may hold substantial percentages of the shares of the Fund, and asset allocation decisions by Lord Abbett may result in substantial redemptions from (or investments in) the Fund. These transactions may adversely affect the Fund’s

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performance to the extent that the Fund is required to sell investments (or invest cash) when it would not otherwise do so. Redemptions of a large number of shares also may increase transaction costs or, by necessitating a sale of portfolio securities, have adverse tax consequences for Fund shareholders. Additionally, redemptions by a large shareholder also potentially limit the use of any capital loss carryforwards and other losses to offset future realized capital gains (if any) and may limit or prevent the Fund’s use of tax equalization.

· Operational Risk: The Fund also is subject to the risk of loss as a result of other services provided by Lord Abbett and other service providers, including pricing, administrative, accounting, tax, legal, custody, transfer agency, and other services. Operational risk includes the possibility of loss caused by inadequate procedures and controls, human error, and system failures by a service provider, each of which may negatively affect the Fund’s performance. For example, trading delays or errors could prevent the Fund from benefiting from potential investment gains or avoiding losses. In addition, a service provider may be unable to provide an NAV for the Fund or share class on a timely basis. Similar types of operational risks also are present for issuers of securities in which the Fund invests, which could result in material adverse consequences for such issuers, and may cause the Fund’s investment in such securities to lose value.

· Business Continuity Risk: Lord Abbett has developed a Business Continuity Program (the “Program”) that is designed to minimize the disruption of normal business operations in the event of an adverse incident impacting Lord Abbett, its affiliates, or the Fund. While Lord Abbett believes that the Program should enable it to reestablish normal business operations in a timely manner in the event of an adverse incident, there are inherent limitations in such programs (including the possibility that contingencies have not been anticipated and procedures do not work as intended) and, under some circumstances, Lord Abbett, its affiliates, and any vendors used by Lord Abbett, its affiliates, or the Fund could be prevented or hindered from providing services to the Fund for extended periods of time. These circumstances may include, without limitation, acts of God, acts of governments, any act of declared or undeclared war or of a public enemy (including acts of terrorism), power shortages or failures, utility or communication failure or delays, labor disputes, strikes, shortages, supply shortages, system failures or malfunctions. The Fund’s ability to recover any losses or expenses it incurs as a result of a disruption of business operations may be limited by the liability, standard of care, and related provisions in its contractual arrangements with Lord Abbett and other service providers.

· Market Disruption and Geopolitical Risk: Geopolitical and other events (e.g., wars, terrorism or natural disasters) may disrupt securities markets and adversely affect global economies and markets, thereby decreasing the value of the Fund’s investments. Sudden or significant changes in the supply or prices of commodities or other economic inputs (e.g., the marked decline in oil prices that began in late 2014) may have material and unexpected effects on both global

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securities markets and individual countries, regions, sectors, companies, or industries, which could significantly reduce the value of the Fund’s investments. Wars, terrorist attacks, natural disasters, epidemics or pandemics could result in unplanned or significant securities market closures or declines. Securities markets also may be susceptible to market manipulation (e.g., the manipulation of the London Inter-bank Offered Rate (“LIBOR”)) or other fraudulent trading practices, which could disrupt the orderly functioning of markets, increase overall market volatility, or reduce the value of investments traded in them, including investments of the Fund. Instances of fraud and other deceptive practices committed by senior management of certain companies in which the Fund invests may undermine Lord Abbett’s due diligence efforts with respect to such companies, and if such fraud is discovered, negatively affect the value of the Fund’s investments. Financial fraud also may impact the rates or indices underlying the Fund’s investments.

While the U.S. Government has always honored its credit obligations, a default by the U.S. Government (as has been threatened over the years) would be highly disruptive to the U.S. and global securities markets and could significantly reduce the value of the Fund’s investments. Similarly, political events within the United States at times have resulted, and may in the future result, in a shutdown of government services, which could adversely affect the U.S. economy, decrease the value of many Fund investments, and increase uncertainty in or impair the operation of the U.S. or other securities markets. Uncertainty surrounding the sovereign debt of several European Union (“EU”) countries, as well as the continued existence of the EU itself, has disrupted and may continue to disrupt markets in the United States and around the world. If a country changes its currency or leaves the EU or if the EU dissolves, the world’s securities markets likely will be significantly disrupted. The United Kingdom (“UK”) left the EU (commonly known as “Brexit”) on January 31, 2020. An agreement between the UK and the EU governing their future trade relationship became effective January 1, 2021. The agreement governs the new relationship between the UK and the EU with respect to trading goods and services but critical aspects of the relationship remain unresolved and subject to further negotiation and agreement. There is still considerable uncertainty relating to the potential consequences of the withdrawal and whether the UK’s exit will increase the likelihood of other countries also departing the EU. The world’s securities markets may be significantly disrupted and adversely affected by the withdrawal.

Substantial government interventions (e.g., currency controls) also could adversely affect the Fund. War, terrorism, economic uncertainty, and related geopolitical events have led, and in the future may lead, to increased short-term market volatility and may have adverse long-term effects on U.S. and world economies and markets generally. Likewise, sanctions threated or imposed by jurisdictions, including the United States, against a country or entities or individuals in a certain country (such as sanctions imposed against Russia,

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Russian entities and Russian individuals in 2022) may impair the value and liquidity of securities issued by issuers in such country and may result in the Fund using fair valuation procedures to value such securities. Sanctions, or the threat of sanctions, may cause volatility in regional and global markets and may negatively impact the performance of various sectors and industries, as well as companies in other countries, which could have a negative effect on the performance of the Fund. In addition, natural and environmental disasters, such as the earthquake and tsunami in Japan in early 2011, epidemics or pandemics, such as the COVID-19 outbreak which began in late 2019, and systemic market dislocations of the kind surrounding the insolvency of Lehman Brothers in 2008, have been highly disruptive to economies and markets, adversely affecting individual companies and industries, securities markets, interest rates, credit ratings, inflation, investor sentiment, and other factors affecting the value of the Fund’s investments. During such market disruptions, the Fund’s exposure to the risks described elsewhere in the “Principal Risks” section of the prospectus will likely increase. Market disruptions and sudden government interventions can also prevent the Fund from implementing its investment strategies and achieving its investment objective. To the extent the Fund has focused its investments in the stock index of a particular region, adverse geopolitical and other events in that region could have a disproportionate impact on the Fund.

The transmission of COVID-19 and efforts to contain its spread resulted in, and will continue to result in, for the forseeable future, among other things, border closings and other significant travel restrictions and disruptions, significant disruptions to business operations, supply chains and customer activity, lower consumer demand for goods and services, event cancellations and restrictions, service cancellations, reductions and other changes, significant challenges in healthcare service preparation and delivery, and prolonged quarantines, as well as general concern and uncertainty. The impact of the COVID-19 outbreak has, and could again negatively affect the global economy, the economies of individual countries, and the financial performance of individual issuers, sectors, industries, asset classes, and markets in significant and unforeseen ways. The COVID-19 pandemic and its effects may last for an extended period of time. New variants and low rates of vaccination in certain areas of the world have hampered recovery efforts and continue to create further uncertainty. Even as restrictions have been lifted in certain jurisdictions, they have been reimposed in others, and this pattern is expected to continue for the foreseeable future as certain jurisdictions experience resurgences of COVID-19. Although the long-term economic fallout of COVID-19 is difficult to predict, it has contributed to, and is likely to continue to contribute to, market volatility, inflation and systemic economic weakness. As the world adapts to a new outlook on how to balance the risk of illness against the desire for in person human connection, the COVID-19 pandemic and its effects are expected to continue through 2022 and beyond, and therefore the economic outlook, particularly for certain industries and businesses, remains inherently uncertain. The foregoing could disrupt the

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operations of the Fund and its service providers, adversely affect the value and liquidity of the Fund’s investments, and negatively impact the Fund’s performance and your investment in the Fund. The COVID-19 pandemic and efforts to contain its spread may also exacerbate other risks that apply to the Fund.

· Valuation Risk: The valuation of the Fund’s investments involves subjective judgment. There can be no assurance that the Fund will value its investments in a manner that accurately reflects their current market values or that the Fund will be able to sell any investment at a price equal to the valuation ascribed to that investment for purposes of calculating the Fund’s NAV. Incorrect valuations of the Fund’s portfolio holdings could result in the Fund’s shareholder transactions being effected at an NAV that does not accurately reflect the underlying value of the Fund’s portfolio, resulting in the dilution of shareholder interests.

DISCLOSURE OF PORTFOLIO HOLDINGS

A description of the Funds’ policies and procedures regarding the disclosure of the Funds’ portfolio holdings is available in the SAI. Further information is available at www.lordabbett.com.

MANAGEMENT AND ORGANIZATION OF THE FUNDS

Board of Directors. The Board oversees the management of the business and affairs of the Funds. The Board appoints officers who are responsible for the day-to-day operations of the Funds and who execute policies authorized by the Board. At least 75 percent of the Board members are not “interested persons” (as defined in the Investment Company Act of 1940, as amended) of the Funds.

Investment Adviser. The Funds’ investment adviser is Lord Abbett, which is located at 90 Hudson Street, Jersey City, NJ 07302-3973. Founded in 1929, Lord Abbett manages one of the nation’s oldest mutual fund complexes and manages approximately $242.8 billion in assets across a full range of mutual funds, institutional accounts, and separately managed accounts, including $1.1 billion for which Lord Abbett provides investment models to managed account sponsors as of February 28, 2022.

Portfolio Managers. The Funds are managed by experienced portfolio managers responsible for investment decisions together with a team of investment professionals who provide issuer, industry, sector and macroeconomic research and analysis. The SAI contains additional information about portfolio manager compensation, other accounts managed, and ownership of shares of the Funds.

Dividend Growth Fund. Darnell C. Azeez, Managing Director and Portfolio Manager, heads the Fund’s team. Mr. Azeez joined Lord Abbett in 2002. Additional members of the team are Marc O. Pavese, Partner and Director of Quantitative Research, Jeffrey Rabinowitz, Portfolio Manager, Servesh Tiwari, Portfolio Manager, and Subrata Ghose, Portfolio Manager. Messrs. Pavese, Rabinowitz,

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Tiwari, and Ghose joined Lord Abbett in 2008, 2017, 2015, and 2011, respectively. Mr. Rabinowitz was formerly Managing Director and Portfolio Manager/Technology Analyst at Jennison Associates LLC from 2014 to 2017. Messrs. Azeez, Pavese, Rabinowitz, Tiwari, and Ghose are jointly and primarily responsible for the day-to-day management of the Fund.

Growth Opportunities Fund. Jeffrey Rabinowitz, Portfolio Manager, heads the Fund’s team. Mr. Rabinowitz joined Lord Abbett in 2017 and was formerly Managing Director and Portfolio Manager/Technology Analyst at Jennison Associates LLC from 2014 to 2017. Additional members of the team are Heidi A. Lawrence, Portfolio Manager, and James B. Sullivan, Portfolio Manager. Ms. Lawrence and Mr. Sullivan joined Lord Abbett in 2014. Messrs. Rabinowitz, Sullivan and Ms. Lawrence are jointly and primarily responsible for the day-to-day management of the Fund.

Small Cap Value Fund. John C. Hardy, Portfolio Manager, heads the Fund’s team. Mr. Hardy joined Lord Abbett in 2011. Mr. Hardy is primarily responsible for the day-to-day management of the Fund.

Management Fee. Lord Abbett is entitled to a management fee for Dividend Growth Fund as calculated at the following annual rates:

 0.55% on the first $2 billion of average daily net assets; and

 0.49% on the Fund’s average daily net assets over $2 billion.

For the fiscal year ended November 30, 2021, the effective annual rate of the fee paid to Lord Abbett, net of any applicable waivers or reimbursements, was 0.53% of Dividend Growth Fund’s average daily net assets.

Lord Abbett is entitled to a management fee for Growth Opportunities Fund as calculated at the following annual rates:

 0.75% on the first $1 billion of average daily net assets;

 0.65% on the next $1 billion of average daily net assets;

 0.60% on the next $1 billion of average daily net assets; and

 0.58% on the Fund’s average daily net assets over $3 billion.

For the fiscal year ended November 30, 2021, the effective annual rate of the fee paid to Lord Abbett, net of any applicable waivers or reimbursements, was 0.64% of Growth Opportunities Fund’s average daily net assets.

Lord Abbett is entitled to a management fee for Small Cap Value Fund as calculated at the following annual rates:

0.75% on the first $2 billion of average daily net assets; and
0.70% on the Fund’s average daily net assets over $2 billion.

For the fiscal year ended November 30, 2021, the effective annual rate of the fee paid to Lord Abbett was 0.75% of Small Cap Value Fund’s average daily net assets.

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In addition, Lord Abbett provides certain administrative services to each Fund pursuant to an Administrative Services Agreement in return for a fee at an annual rate of 0.04% of each Fund’s average daily net assets. Each Fund pays all of its expenses not expressly assumed by Lord Abbett.

Each year the Board considers whether to approve the continuation of the existing management and administrative services agreements between the Funds and Lord Abbett. A discussion regarding the basis for the Board’s approval is available in the Funds’ semiannual report to shareholders for the six-month period ended May 31^st.

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CHOOSING A SHARE CLASS

Each class of shares represents an investment in the same portfolio of securities, but each has different availability and eligibility criteria, sales charges, expenses, and dividends, allowing you to choose the available class that best meets your needs. You should read this section carefully to determine which class of shares is best for you and discuss your selection with your financial intermediary. Factors you should consider in choosing a share class include:

· the amount you plan to invest;

· the length of time you expect to hold your investment;

· the total costs associated with your investment, including any sales charges that you may pay when you buy or sell your Fund shares and expenses that are paid out of Fund assets over time;

· whether you qualify for any reduction or waiver of sales charges;

· whether you plan to take any distributions in the near future;

· the availability of the share class;

· the services that will be available to you; and

· the amount of compensation that your financial intermediary will receive.

If you plan to invest a large amount and your investment horizon is five years or more, as between Class A and C shares, Class A shares may be more advantageous than Class C shares. The higher ongoing annual expenses of Class C shares may cost you more over the long term than the front-end sales charge you would pay on larger purchases of Class A shares.

Key Features of Share Classes. The following table compares key features of each share class. You should review the fee table and example at the front of this

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prospectus carefully before choosing your share class. For more information, please see the section of the prospectus titled “Choosing a Share Class – Additional Information about the Availability of Share Classes.” As a general matter, share classes with relatively lower expenses tend to have relatively higher dividends. Your financial intermediary can help you decide which class meets your goals. Not all share classes may be available for purchase in all states or available through your financial intermediary. Please check with your financial intermediary for more information about the availability of share classes. Your financial intermediary may receive different compensation depending upon which class you choose.

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Investment Minimums. The minimum initial and additional amounts shown below vary depending on the class of shares you buy and the type of account. Certain financial intermediaries may impose different restrictions than those described

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below. Consult your financial intermediary for more information. For Class I shares, the minimum investment shown below applies to certain types of institutional investors, but does not apply to registered investment advisers or retirement and benefit plans otherwise eligible to invest in Class I shares. Class P shares are closed to substantially all new investors.

Class I Share Minimum Investment. Unless otherwise provided, the minimum amount of an initial investment in Class I shares is $1 million. There is no minimum initial investment for (i) purchases through or by registered investment advisers, bank trust departments, and other financial intermediaries otherwise eligible to purchase Class I shares that charge a fee for services that include investment advisory or management services or (ii) purchases by retirement and benefit plans meeting the Class I eligibility requirements described below. There is no investment minimum for additional investments in Class I shares. These investment minimums may be suspended, changed, or withdrawn by Lord Abbett Distributor, the Funds’ principal underwriter.

Additional Information about the Availability of Share Classes.

Class A Shares. Class A shares are available for investment by retirement and benefit plans only under the following circumstances: (i) the retirement and benefit plans have previously invested in Class A shares of the Fund as of the close of business on December 31, 2015; (ii) the retirement and benefit plan investments are subject to a front-end sales charge and, with respect to retirement or benefit plans serviced by a recordkeeping platform, such recordkeeping platform is able to apply

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properly a sales charge on such investments by the plan; or (iii) the retirement and benefit plan investments are eligible for a Class A sales charge waiver under Appendix A to this prospectus. Class A shares remain available to retail non-retirement accounts, traditional and Roth IRAs, Coverdell Education Savings Accounts, SEPs, SARSEPs, SIMPLE IRAs, individual 403(b) plans, and 529 college savings plans.

Class C Shares. The Fund will not accept purchases of Class C shares of $500,000 or more, or in any amount that, when combined with the value of all shares of Eligible Funds under the terms of rights of accumulation, would result in the investor holding more than $500,000 of shares of Eligible Funds at the time of such purchase, unless an appropriate representative of the investor’s broker-dealer firm (or other financial intermediary, as applicable) provides written authorization for the transaction. Please contact Lord Abbett Distributor with any questions regarding eligibility to purchase Class C shares based on the prior written authorization from the investor’s broker-dealer firm or other financial intermediary.

With respect to qualified retirement plans, the Fund will not reject a purchase of Class C shares by such a plan in the event that a purchase amount, when combined with the value of all shares of Eligible Funds under the terms of rights of accumulation, would result in the plan holding more than $500,000 of shares of Eligible Funds at the time of the purchase. Any subsequent purchase orders submitted by the plan, however, would be subject to the Class C share purchase limit policy described above. Such subsequent purchases would be considered purchase orders for Class R3 shares.

Class F Shares. Class F shares generally are available (1) to investors participating in fee-based advisory programs that have (or whose trading agents have) an agreement with Lord Abbett Distributor, (2) to investors that are clients of certain registered investment advisers that have an agreement with Lord Abbett Distributor, if it so deems appropriate, and (3) to individual investors through financial intermediaries that offer Class F shares.

Class F3 Shares. Class F3 shares are available (1) for orders made by or on behalf of financial intermediaries for clients participating in fee-based advisory programs that have entered into special arrangements with the Fund and/or Lord Abbett Distributor specifically for such orders, (2) to investors that are clients of certain registered investment advisers that have an agreement with Lord Abbett Distributor, if it so deems appropriate, (3) to individual investors through financial intermediaries that offer Class F3 shares, (4) to state sponsored 529 college savings plans, (5) to institutional investors, including companies, foundations, endowments, municipalities, trusts (other than individual or personal trusts established for estate or financial planning purposes), and other entities determined by Lord Abbett Distributor to be institutional investors, making an initial minimum purchase of Class F3 shares of at least $1 million in the Fund in which the institutional investor purchases Class F3 shares, and (6) to other programs and platforms that have an agreement with the Fund and/or Lord Abbett Distributor.

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Class I Shares. Class I shares are available for purchase by the entities identified below. An investor that is eligible to purchase Class I shares under one of the categories below need not satisfy the requirements of any other category.

· Institutional investors, including companies, foundations, endowments, municipalities, trusts (other than individual or personal trusts established for estate or financial planning purposes), and other entities determined by Lord Abbett Distributor to be institutional investors, making an initial minimum purchase of Class I shares of at least $1 million in the Fund in which the institutional investor purchases Class I shares. Such institutional investors may purchase Class I shares directly or through a registered broker-dealer, provided that such purchases are not made by or on behalf of institutional investors that are participants in a fee-based program the participation in which is available to non-institutional investors, as described below.

· Investors participating in fee-based advisory programs that have (or whose trading agents have) an agreement with Lord Abbett Distributor.

· Financial institutions, on behalf of individual investors, that have an agreement to offer Class I shares across their investment platforms.

· Registered investment advisers investing on behalf of their advisory clients may purchase Class I shares without any minimum initial investment.

· Participants in a bank-offered fee-based program may purchase Class I shares without any minimum initial investment if: (i) the program is part of a research-driven discretionary advisory platform offered through affiliated distribution channels including, at a minimum, private bank, broker-dealer, and independent registered investment advisor channels; and (ii) the program uses institutional mutual fund share classes exclusively.

· Bank trust departments and trust companies purchasing shares for their clients may purchase Class I shares without any minimum initial investment, provided that the bank or trust company (and its trading agent, if any) has entered into a special arrangement with the Fund and/or Lord Abbett Distributor specifically for such purchases. This provision does not extend to bank trust departments acting on behalf of retirement and benefit plans, which are subject to separate eligibility criteria as discussed immediately below.

· Retirement and benefit plans investing directly or through an intermediary may purchase Class I shares without any minimum initial investment, provided that in the case of an intermediary, the intermediary has entered into a special arrangement with the Fund and/or Lord Abbett Distributor specifically for such purchases subject to the following limitations. Class I shares are closed to substantially all new retirement and benefit plans. However, retirement and benefit plans that have invested in Class I shares as of the close of business on December 31, 2015, may continue to hold Class I shares and may make

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additional purchases of Class I shares, including purchases by new plan participants.

· Each registered investment company within the Lord Abbett Family of Funds that operates as a fund-of-funds and, at the discretion of Lord Abbett Distributor, other registered investment companies that are not affiliated with Lord Abbett and operate as funds-of-funds, may purchase Class I shares without any minimum initial investment.

Shareholders who do not meet the above criteria but currently hold Class I shares may continue to hold, purchase, exchange, and redeem Class I shares, provided that there has been no change in the account since purchasing Class I shares. Financial intermediaries should contact Lord Abbett Distributor to determine whether the financial intermediary may be eligible for such purchases.

Class P Shares. Class P shares are closed to substantially all new investors. Existing shareholders holding Class P shares may continue to hold their Class P shares and make additional purchases, redemptions, and exchanges. Class P shares also are available for orders made by or on behalf of a financial intermediary for clients participating in an IRA rollover program sponsored by the financial intermediary that operates the program in an omnibus recordkeeping environment and has entered into special arrangements with the Fund and/or Lord Abbett Distributor specifically for such orders.

Class R2, R3, R4, R5, and R6 (collectively referred to as “Class R”) Shares. Class R shares generally are available through:

· employer-sponsored retirement and benefit plans where the employer, administrator, recordkeeper, sponsor, related person, financial intermediary, or other appropriate party has entered into an agreement with the Fund or Lord Abbett Distributor to make Class R shares available to plan participants; or

· dealers that have entered into certain approved agreements with Lord Abbett Distributor.

Class R shares also are available for orders made by or on behalf of a financial intermediary for clients participating in an IRA rollover program sponsored by the financial intermediary that operates the program in an omnibus recordkeeping environment and has entered into special arrangements with the Fund and/or Lord Abbett Distributor specifically for such orders.

Class R shares generally are not available to retail non-retirement accounts, traditional and Roth IRAs, Coverdell Education Savings Accounts, SEPs, SARSEPs, SIMPLE IRAs, individual 403(b) plans, or 529 college savings plans.

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SALES CHARGES

As an investor in the Fund, you may pay one of two types of sales charges: a front-end sales charge that is deducted from your investment when you buy Fund shares or a CDSC that applies when you sell Fund shares.

Class A Share Front-End Sales Charge. Front-end sales charges are applied only to Class A shares. You buy Class A shares at the offering price, which is the NAV plus a sales charge. You pay a lower rate as the size of your investment increases to certain levels called breakpoints. You do not pay a sales charge on the Fund’s distributions or dividends you reinvest in additional Class A shares. The table below shows the rate of sales charge you pay (expressed as a percentage of the offering price and the net amount you invest), depending on the class and amount you purchase.

CDSC. Regardless of share class, the CDSC is not charged on shares acquired through reinvestment of dividends or capital gain distributions and is charged on the

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original purchase cost or the current market value of the shares at the time they are redeemed, whichever is lower. In addition, repayment of loans under certain retirement and benefit plans will constitute new sales for purposes of assessing the CDSC. To minimize the amount of any CDSC, the Fund redeems shares in the following order:

1. shares acquired by reinvestment of dividends and capital gain distributions (always free of a CDSC);

2. shares held for one year or more (Class A and C); and

3. shares held before the first anniversary of their purchase (Class A and C).

If you acquire Fund shares through an exchange from another Lord Abbett Fund that originally were purchased subject to a CDSC and you redeem before the applicable CDSC period has expired, you will be charged the CDSC (unless a CDSC waiver applies). The CDSC will be remitted to the appropriate party. Class F, F3, I, P, R2, R3, R4, R5, and R6 shares are not subject to a CDSC.

Class A Share CDSC. If you buy Class A shares of the Fund under certain purchases at NAV (without a front-end sales charge) or if you acquire Class A shares of the Fund in exchange for Class A shares of another Lord Abbett Fund subject to a CDSC, and you redeem any of the Class A shares before the first day of the month in which the one-year anniversary of your purchase falls, a CDSC of 1.00% normally will be collected.

Class C Share CDSC. The 1.00% CDSC for Class C shares normally applies if you redeem your shares before the first anniversary of your purchase. The CDSC will be remitted to Lord Abbett Distributor.

SALES CHARGE REDUCTIONS AND WAIVERS

Reducing Your Class A Share Front-End Sales Charge. You may purchase Class A shares at a discount if you qualify under the circumstances outlined below. To receive a reduced front-end sales charge, you must let the Fund or your financial intermediary know at the time of your purchase of Fund shares that you believe you qualify for a discount. If you or a related party have holdings of Eligible Funds in other accounts with your financial intermediary or with other financial intermediaries that may be combined with your current purchase in determining the sales charge as described below, you must let the Fund or your financial intermediary know. You may be asked to provide supporting account statements or other information to allow us or your financial intermediary to verify your eligibility for a discount. If you or your financial intermediary do not notify the Fund or provide the requested information, you may not receive the reduced sales charge for

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which you otherwise qualify. Class A shares may be purchased at a discount if you qualify under any of the following conditions:

· Larger Purchases – You may reduce or eliminate your Class A front-end sales charge by purchasing Class A shares in greater quantities. The breakpoint discounts offered by the Fund are indicated in the table under “Sales Charges – Class A Share Front-End Sales Charge.”

· Rights of Accumulation –A Purchaser (as defined below) may combine the value of Class A, A1, C, F, F3, I, and P shares of any Eligible Fund currently owned with a new purchase of Class A shares of any Eligible Fund in order to reduce the sales charge on the new purchase. Class R2, R3, R4, R5, and R6 share holdings may not be combined for these purposes.

To the extent that your financial intermediary is able to do so, the value of Class A, A1, C, F, F3, I, and P shares of Eligible Funds determined for the purpose of reducing the sales charge of a new purchase under the Rights of Accumulation will be calculated at the higher of: (1) the aggregate current maximum offering price of your existing Class A, A1, C, F, F3, I, and P shares of Eligible Funds; or (2) the aggregate amount you invested in such shares (including dividend reinvestments but excluding capital appreciation) less any redemptions. You should retain any information and account records necessary to substantiate the historical amounts you and any related Purchasers have invested in Eligible Funds. You must inform the Fund and/or your financial intermediary at the time of purchase if you believe your purchase qualifies for a reduced sales charge and you may be requested to provide documentation of your holdings in order to verify your eligibility. If you do not do so, you may not receive all sales charge reductions for which you are eligible.

· Letter of Intention – In order to reduce your Class A front-end sales charge, a Purchaser may combine purchases of Class A, A1, C, F, F3, I, and P shares of any Eligible Fund the Purchaser intends to make over the next 13 months in determining the applicable sales charge. The 13-month Letter of Intention period commences on the day that the Letter of Intention is received by the Fund, and the Purchaser must tell the Fund that later purchases are subject to the Letter of Intention. Purchases submitted prior to the date the Letter of Intention is received by the Fund are not counted toward the sales charge reduction. Current holdings under Rights of Accumulation may be included in a Letter of Intention in order to reduce the sales charge for purchases during the 13-month period covered by the Letter of Intention. Shares purchased through reinvestment of dividends or distributions are not included. Class R2, R3, R4, R5, and R6 share holdings may not be combined for these purposes. Class A and A1 shares valued at up to 5% of the amount of intended purchases are escrowed and may be redeemed to cover the additional sales charges payable if the intended purchases under the Letter of Intention are not completed. The Letter of Intention is neither a binding obligation on you to buy, nor on the Fund to sell, any or all of the intended purchase amount.

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Front-End Sales Charge Waivers. Class A shares may be purchased without a front-end sales charge (at NAV) under any of the following conditions:

· purchases of $1 million or more (may be subject to a CDSC);

· purchases by retirement and benefit plans with at least 100 eligible employees, if such retirement and benefit plan held Class A shares of the Fund as of the close of business on December 31, 2015 (may be subject to a CDSC);

· purchases for retirement and benefit plans made through financial intermediaries that perform participant recordkeeping or other administrative services for the plans, if such retirement and benefit plan held Class A shares of the Fund as of the close of business on December 31, 2015 (may be subject to a CDSC);

· purchases made by or on behalf of financial intermediaries for clients that pay the financial intermediaries fees in connection with a fee-based advisory program;

· purchases by investors maintaining a brokerage account with a registered broker-dealer that has entered into an agreement with Lord Abbett Distributor to offer Class A shares through a load-waived network or platform, which may or may not charge transaction fees;

· purchases by insurance companies and/or their separate accounts to fund variable insurance contracts, provided that the insurance company provides recordkeeping and related administrative services to the contract owners;

· purchases by employees of eligible institutions under Section 403(b)(7) of the Code, maintaining individual custodial accounts held by a broker-dealer that has entered into or is in the process of negotiating a settlement agreement with the Financial Industry Regulatory Authority or another regulatory body regarding the availability of Class A shares for purchase without a front-end sales charge or CDSC;

· purchases made with dividends and distributions on Class A shares of another Eligible Fund;

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· purchases representing repayment under the loan feature of the Lord Abbett prototype 403(b) plan for Class A shares;

· purchases by employees of any consenting securities dealer having a sales agreement with Lord Abbett Distributor;

· purchases by trustees or custodians of any pension or profit sharing plan or payroll deduction IRA for the employees of any consenting securities dealer having a sales agreement with Lord Abbett Distributor;

· purchases involving the concurrent sale of Class C shares of the Fund by a broker-dealer in connection with a settlement agreement or settlement agreement negotiations between the broker-dealer and a regulatory body relating to share class suitability. These sales transactions will be subject to the assessment of any applicable CDSCs (although the broker-dealer may pay on behalf of the investor or reimburse the investor for any such CDSC), and any investor purchases subsequent to the original concurrent transactions will be at the applicable public offering price, which may include a sales charge; and

· purchases by Board members, Fund officers, and employees and partners of Lord Abbett (including retired persons who formerly held such positions and family members of such purchasers).

CDSC Waivers. The CDSC generally will not be assessed on the redemption of Class A or C shares under the circumstances listed in the table below. Documentation may be required and some limitations may apply.

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Concurrent Sales. A broker-dealer may pay on behalf of an investor or reimburse an investor for a CDSC otherwise applicable in the case of transactions involving purchases through such broker-dealer where the investor concurrently is selling his or her holdings in Class C shares of the Fund and buying Class A shares of the Fund, provided that the purchases are related to the requirements of a settlement agreement that the broker-dealer entered into with a regulatory body relating to share class suitability.

Sales Charge Waivers on Transfers between Accounts. Class A shares can be purchased at NAV under the following circumstances:

· Transfers of Lord Abbett Fund shares from an IRA or other qualified retirement plan account to a taxable account in connection with a required minimum distribution; or

· Transfers of Lord Abbett Fund shares held in a taxable account to an IRA or other qualified retirement plan account for the purpose of making a contribution to the IRA or other qualified retirement plan account.

A CDSC will not be imposed at the time of the transaction under such circumstances; instead, the date on which such shares were initially purchased will be used to calculate any applicable CDSC when the shares are redeemed. You must inform the Fund and/or your financial intermediary at the time of purchase if you believe your purchase qualifies for a reduced sales charge and you may be requested to provide documentation of your holdings in order to verify your eligibility. If you

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do not do so, you may not receive all sales charge reductions for which you are eligible.

Reinvestment Privilege. If you redeem Class A or C shares of the Fund, you may reinvest some or all of the proceeds in the same class of any Eligible Fund on or before the 90^th day after the redemption without a sales charge unless the reinvestment would be prohibited by the Fund’s frequent trading policy. Special tax rules may apply. If you paid a CDSC when you redeemed your shares, you will be credited with the amount of the CDSC. All accounts involved must have the same registration. This privilege does not apply to purchases made through Invest-A-Matic or other automatic investment services. The reinvestment privilege only applies to your Fund’s shares if you previously paid a front-end sales charge in connection with your purchase of such shares.

FINANCIAL INTERMEDIARY COMPENSATION

As part of a plan for distributing shares, authorized financial intermediaries that sell the Fund’s shares and service its shareholder accounts receive sales and service compensation. Additionally, authorized financial intermediaries may charge a fee to effect transactions in Fund shares.

Sales compensation originates from sales charges that are paid directly by shareholders and 12b-1 distribution fees that are paid by the Fund out of share class assets. Service compensation originates from 12b-1 service fees. Because 12b-1 fees are paid on an ongoing basis, over time the payment of such fees will increase the cost of an investment in the Fund, which may be more than the cost of other types of sales charges. The Fund accrues 12b-1 fees daily at annual rates shown in the “Fees and Expenses” table above based upon average daily net assets. The portion of the distribution and service (12b-1) fees that Lord Abbett Distributor pays to financial intermediaries for each share class is as follows:

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Lord Abbett Distributor may pay 12b-1 fees to authorized financial intermediaries or use the fees for other distribution purposes, including revenue sharing. The amounts paid by the Fund need not be directly related to expenses. If Lord Abbett Distributor’s actual expenses exceed the fee paid to it, the Fund will not have to pay more than that fee. Conversely, if Lord Abbett Distributor’s expenses are less than the fee it receives, Lord Abbett Distributor will keep the excess amount of the fee.

Sales Activities. The Fund may use 12b-1 distribution fees to pay authorized financial intermediaries to finance any activity that primarily is intended to result in the sale of shares. Lord Abbett Distributor uses its portion of the distribution fees attributable to the shares of a particular class for activities that primarily are intended to result in the sale of shares of such class. These activities include, but are not limited to, printing of prospectuses and statements of additional information and reports for anyone other than existing shareholders, preparation and distribution of advertising and sales material, expenses of organizing and conducting sales seminars, additional payments to authorized financial intermediaries, maintenance of shareholder accounts, the cost necessary to provide distribution-related services or personnel, travel, office expenses, equipment and other allocable overhead.

Service Activities. Lord Abbett Distributor may pay 12b-1 service fees to authorized financial intermediaries for any activity that primarily is intended to result in personal service and/or the maintenance of shareholder accounts or certain retirement and benefit plans. Any portion of the service fees paid to Lord Abbett Distributor will be used to service and maintain shareholder accounts.

Dealer Concessions on Class A Share Purchases With a Front-End Sales Charge. See “Sales Charges – Class A Share Front-End Sales Charge” for more information.

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Dealer Concessions on Class A Share Purchases Without a Front-End Sales Charge. Except as otherwise set forth in the following paragraphs, Lord Abbett Distributor may pay Dealers distribution-related compensation (i.e., concessions) according to the schedule set forth below under the following circumstances (may be subject to a CDSC):

· purchases of $1 million or more;

· purchases by certain retirement and benefit plans with at least 100 eligible employees; or

· purchases for certain retirement and benefit plans made through financial intermediaries that perform participant recordkeeping or other administrative services for the plans in connection with multiple fund family recordkeeping platforms and have entered into special arrangements with the Fund and/or Lord Abbett Distributor specifically for such purchases (“Alliance Arrangements”).

Dealers receive concessions described below on purchases made within a 12-month period beginning with the first NAV purchase of Class A shares for the account. The concession rate resets on each anniversary date of the initial NAV purchase, provided that the account continues to qualify for treatment at NAV. Current holdings of Class C and P shares of Eligible Funds will be included for purposes of calculating the breakpoints in the schedule below and the amount of the concessions payable with respect to the Class A share investment. Concessions may not be paid with respect to Alliance Arrangements unless Lord Abbett Distributor can monitor the applicability of the CDSC.

Financial intermediaries should contact Lord Abbett Distributor for more complete information on the commission structure.

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Dealer Concessions on Class C Shares. Lord Abbett Distributor may pay financial intermediaries selling Class C shares a sales concession of up to 1.00% of the purchase price of the Class C shares and Lord Abbett Distributor will collect and retain any applicable CDSC.

Dealer Concessions on Class F, F3, I, P, R2, R3, R4, R5, and R6 Shares. Class F, F3, I, P, R2, R3, R4, R5, and R6 shares are purchased at NAV with no front-end sales charge and no CDSC when redeemed. Accordingly, there are no dealer concessions on these shares.

Revenue Sharing and Other Payments to Dealers and Financial Intermediaries. Lord Abbett (the term “Lord Abbett” in this section also refers to Lord Abbett Distributor unless the context requires otherwise) may make payments to certain financial intermediaries for marketing and distribution support activities. Lord Abbett makes these payments, at its own expense, out of its own resources (including revenues from advisory fees and 12b-1 fees), and without any additional costs to the Fund or the Fund’s shareholders.

These payments, which may include amounts that sometimes are referred to as “revenue sharing” payments, are in addition to the Fund’s fees and expenses described in this prospectus. In general, these payments are intended to compensate or reimburse financial intermediary firms for certain activities, including: promotion of sales of Fund shares, such as placing the Lord Abbett Family of Funds on a preferred list of fund families; making Fund shares available on certain platforms, programs, or trading venues; educating a financial intermediary firm’s sales force about the Lord Abbett Funds; providing services to shareholders; and various other promotional efforts and/or costs. The payments made to financial intermediaries may be used to cover costs and expenses related to these promotional efforts, including travel, lodging, entertainment, and meals, among other things. In addition, Lord Abbett may provide payments to a financial intermediary in connection with Lord Abbett’s participation in or support of conferences and other events sponsored, hosted, or organized by the financial intermediary. The aggregate amount of these payments may be substantial and may exceed the actual costs incurred by the financial intermediary in engaging in these promotional activities or services and the financial intermediary firm may realize a profit in connection with such activities or services.

Lord Abbett may make such payments on a fixed or variable basis based on Fund sales, assets, transactions processed, and/or accounts attributable to a financial intermediary, among other factors. Lord Abbett determines the amount of these payments in its sole discretion. In doing so, Lord Abbett may consider a number of factors, including: a financial intermediary’s sales, assets, and redemption rates; the nature and quality of any shareholder services provided by the financial intermediary; the quality and depth of the financial intermediary’s existing business relationships with Lord Abbett; the expected potential to expand such relationships; and the financial intermediary’s anticipated growth prospects. Not all financial intermediaries receive revenue sharing payments and the amount of revenue sharing

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payments may vary for different financial intermediaries. Lord Abbett may choose not to make payments in relation to certain of the Lord Abbett Funds or certain classes of shares of any particular Fund.

In some circumstances, these payments may create an incentive for a broker-dealer or its investment professionals to recommend or sell Fund shares to you. Lord Abbett may benefit from these payments to the extent the broker-dealers sell more Fund shares or retain more Fund shares in their clients’ accounts because Lord Abbett receives greater management and other fees as Fund assets increase. For more specific information about these payments, including revenue sharing arrangements, made to your broker-dealer or other financial intermediary and the conflicts of interest that may arise from such arrangements, please contact your investment professional. In addition, please see the SAI for more information regarding Lord Abbett’s revenue sharing arrangements with financial intermediaries.

Payments for Recordkeeping, Networking, and Other Services. In addition to the payments from Lord Abbett or Lord Abbett Distributor described above, from time to time, Lord Abbett and Lord Abbett Distributor may have other relationships with financial intermediaries relating to the provision of services to the Fund, such as providing omnibus account services or executing portfolio transactions for the Fund. The Fund generally may pay recordkeeping fees for services provided to plans where the account is a plan-level or fund-level omnibus account and plan participants have the ability to determine their investments in particular mutual funds. If your financial intermediary provides these services, Lord Abbett or the Fund may compensate the financial intermediary for these services. In addition, your financial intermediary may have other relationships with Lord Abbett or Lord Abbett Distributor that are not related to the Fund.

For example, the Lord Abbett Funds may enter into arrangements with and pay fees to financial intermediaries that provide recordkeeping or other subadministrative services to certain groups of investors in the Lord Abbett Funds, including participants in retirement and benefit plans, investors in mutual fund advisory programs, investors in variable insurance products and clients of financial intermediaries that operate in an omnibus environment (collectively, “Investors”). The recordkeeping services typically include: (a) establishing and maintaining Investor accounts and records; (b) recording Investor account balances and changes thereto; (c) arranging for the wiring of funds; (d) providing statements to Investors; (e) furnishing proxy materials, periodic Lord Abbett Fund reports, prospectuses and other communications to Investors as required; (f) transmitting Investor transaction information; and (g) providing information in order to assist the Lord Abbett Funds in their compliance with state securities laws. The fees that the Lord Abbett Funds pay are designed to compensate financial intermediaries for such services.

The Lord Abbett Funds also may pay fees to broker-dealers for networking services. Networking services may include but are not limited to:

· establishing and maintaining individual accounts and records;

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· providing client account statements; and

· providing 1099 forms and other tax statements.

The networking fees that the Lord Abbett Funds pay to broker-dealers normally result in reduced fees paid by the Fund to the transfer agent, which otherwise would provide these services.

Financial intermediaries may charge additional fees or commissions other than those disclosed in this prospectus, such as a transaction based fee or other fee for its service, and may categorize and disclose these arrangements differently than described in the discussion above and in the SAI. You may ask your financial intermediary about any payments it receives from Lord Abbett or the Fund, as well as about fees and/or commissions it charges.

PURCHASES

Initial Purchases. Lord Abbett Distributor acts as an agent for the Fund to work with financial intermediaries that buy and sell shares of the Fund on behalf of their clients. Generally, Lord Abbett Distributor does not sell Fund shares directly to investors. Initial purchases of Fund shares may be made through any financial intermediary that has a sales agreement with Lord Abbett Distributor. Unless you are investing in the Fund through a retirement and benefit plan, fee-based program or other financial intermediary, you and your investment professional may fill out the application and send it to the Fund at the address below. To open an account through a retirement and benefit plan, fee-based program or other type of financial intermediary, you should contact your financial intermediary for instructions on opening an account.

[Name of Fund]
P.O. Box 219336
Kansas City, MO 64121

Please do not send account applications or purchase, exchange, or redemption orders to Lord Abbett’s offices in Jersey City, NJ.

Additional Purchases. You may make additional purchases of Fund shares by contacting your investment professional or financial intermediary. If you have direct account privileges with the Fund, you may make additional purchases by:

· Telephone. If you have established a bank account of record, you may purchase Fund shares by telephone. You or your investment professional should call the Fund at 888-522-2388.

· Online. If you have established a bank account of record, you may submit a request online to purchase Fund shares by accessing your account online. Please log onto www.lordabbett.com and enter your account information and personal identification data.

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· Mail. You may submit a written request to purchase Fund shares by indicating the name(s) in which the account is registered, the Fund’s name, the class of shares, your account number, and the dollar amount you wish to purchase. Please include a check for the amount of the purchase, which may be subject to a sales charge. If purchasing Fund shares by mail, your purchase order will not be accepted or processed until such orders are received by the Fund at P.O. Box 219336, Kansas City, MO 64121.

· Wire. You may purchase Fund shares via wire by sending your purchase amount to: UMB, N.A., Kansas City, routing number: 101000695, bank account number: 987800033-3, FBO: (your account name) and (your Lord Abbett account number). Specify the complete name of the Fund and the class of shares you wish to purchase.

Good Order. “Good order” generally means that your purchase request includes: (1) the name of the Fund; (2) the class of shares to be purchased; (3) the dollar amount of shares to be purchased; (4) your properly completed account application or investment stub; and (5) a check payable to the name of the Fund or a wire transfer received by the Fund. In addition, for your purchase request to be considered in good order, you must satisfy any eligibility criteria and minimum investment requirements applicable to the Fund and share class you are seeking to purchase. An initial purchase order submitted directly to the Fund, or the Fund’s authorized agent (or the agent’s designee), must contain: (1) an application completed in good order with all applicable requested information; and (2) payment by check or instructions to debit your checking account along with a canceled check containing account information. Additional purchase requests must include all required information and the proper form of payment (i.e., check or wired funds).

See “Account Services and Policies – Procedures Required by the USA PATRIOT Act” for more information.

Initial and additional purchases of Fund shares are executed at the NAV next determined after the Fund or the Fund’s authorized agent receives your purchase request in good order. The Fund reserves the right to modify, restrict or reject any purchase order (including exchanges). All purchase orders are subject to acceptance by the Fund.

Insufficient Funds. If you request a purchase and your bank account does not have sufficient funds to complete the transaction at the time it is presented to your bank, your requested transaction will be reversed and you will be subject to any and all losses, fees and expenses incurred by the Fund in connection with processing the insufficient funds transaction. The Fund reserves the right to liquidate all or a portion of your Fund shares to cover such losses, fees and expenses.

Non-U.S. Investors. The Lord Abbett Family of Funds are not offered to investors resident outside the United States. The Funds may, however, accept purchases from U.S. citizens resident outside the United States who meet applicable eligibility requirements and furnish any requested documentation.

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EXCHANGES

You or your investment professional may instruct the Fund to exchange shares of any class for shares of the same class of any other Lord Abbett Fund (except for Lord Abbett Credit Opportunities Fund and Lord Abbett Special Situations Income Fund), provided that the fund shares to be acquired in the exchange are available to new investors in such other fund. For investors investing through retirement and benefit plans or fee-based programs, you should contact the financial intermediary that administers your plan or sponsors the fee-based program to request an exchange.

If you have direct account privileges with the Fund, you may request an exchange transaction by:

· Telephone. You or your investment professional should call the Fund at 888-522-2388.

· Online. You may submit a request online to exchange your Fund shares by accessing your account online. Please log onto www.lordabbett.com and enter your account information and personal identification data.

· Mail. You may submit a written request to exchange your Fund shares by indicating the name(s) in which the account is registered, the Fund’s name, the class of shares, your account number, the dollar amount or number of shares you wish to exchange, and the name(s) of the Eligible Fund(s) into which you wish to exchange your Fund shares. If submitting a written request to exchange Fund shares, your exchange request will not be processed until the Fund receives the request in good order at P.O. Box 219336, Kansas City, MO 64121.

The Fund may revoke the exchange privilege for all shareholders upon 60 days’ written notice. In addition, there are limitations on exchanging Fund shares for a different class of shares, and moving shares held in certain types of accounts to a different type of account or to a new account maintained by a financial intermediary. Please speak with your financial intermediary if you have any questions.

An exchange of Fund shares for shares of another Lord Abbett Fund will be treated as a sale of Fund shares and any gain on the transaction may be subject to federal income tax. You should read the current prospectus for any Lord Abbett Fund into which you are exchanging.

Conversions at the Request of a Financial Intermediary. Subject to the conditions set forth in this paragraph, shares of one class of the Fund may be converted into (i.e., exchanged for) shares of a different class of the Fund at the request of a shareholder’s financial intermediary. To qualify for a conversion, the shareholder must satisfy the conditions for investing in the class into which the conversion is sought (as described in this prospectus and the SAI). Also, shares are not eligible to be converted until any applicable CDSC period has expired. No sales charge will be imposed on converted shares. The financial intermediary making the conversion request must submit the request in writing. In addition, the financial intermediary or other responsible party must process and report the transaction as a conversion.

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The value of the shares received during a conversion will be based on the relative NAV of the shares being converted and the shares received as a result of the conversion. It generally is expected that conversions will not result in taxable gain or loss.

REDEMPTIONS

You may redeem your Fund shares by contacting your investment professional or financial intermediary. For shareholders investing through retirement and benefit plans or fee-based programs, you should contact the financial intermediary that administers your plan or sponsors the fee-based program to redeem your shares. You may be required to provide the Fund with certain legal or other documents completed in good order before your redemption request will be processed.

If you have direct account privileges with the Fund, you may redeem your Fund shares by:

· Telephone. You may redeem $100,000 or less from your account by telephone. You or your representative should call the Fund at 888-522-2388.

· Online. You may submit a request online to redeem your Fund shares by accessing your account online. Please log onto www.lordabbett.com and enter your account information and personal identification data.

· Mail. You may submit a written request to redeem your Fund shares by indicating the name(s) in which the account is registered, the Fund’s name, your account number, and the dollar amount or number of shares you wish to redeem. If submitting a written request to redeem your shares, your redemption will not be processed until the Fund receives the request in good order at P.O. Box 219336, Kansas City, MO 64121.

Insufficient Account Value. If you request a redemption transaction for a specific amount and your account value at the time the transaction is processed is less than the requested redemption amount, the Fund will deem your request as a request to liquidate your entire account.

Redemption Payments. Redemptions of Fund shares are executed at the NAV next determined after the Fund or your financial intermediary receives your request in good order. Normally, redemption proceeds are paid within three (but no more than seven) days after your redemption request is received in good order. If you redeem shares that were recently purchased, the Fund may delay the payment of the redemption proceeds until your check, bank draft, electronic funds transfer or wire transfer has cleared, which may take several days. This process may take up to 15 calendar days for purchases by check to clear. The Fund may postpone payment for more than seven days or suspend redemptions (i) during any period that the New York Stock Exchange (“NYSE”) is closed, or trading on the NYSE is restricted as determined by the U.S. Securities and Exchange Commission (“SEC”); (ii) during any period when an emergency exists as determined by the SEC as a result of which it is not practicable for the Fund to dispose of securities it owns, or fairly to

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determine the value of its assets; and/or (iii) for such other periods as the SEC may permit.

If you have direct account access privileges, the redemption proceeds will be paid by electronic transfer via an automated clearing house deposit to your bank account on record with the Fund. If there is no bank account on record, your redemption proceeds normally will be paid by check payable to the registered account owner(s) and mailed to the address to which the account is registered.

You may request that your redemption proceeds of at least $1,000 be disbursed by wire to your bank account of record by contacting the Fund and requesting the redemption and wire transfer and providing the proper wiring instructions for your bank account of record.

You may request that redemption proceeds be made payable and disbursed to a person or account other than the shareholder(s) of record, provided that you provide a signature guarantee by an eligible guarantor, including a broker or bank that is a member of the medallion stamp program. Please note that a notary public is not an eligible guarantor.

A guaranteed signature by an eligible guarantor is designed to protect you from fraud. The Fund generally will require a guaranteed signature by an eligible guarantor on requests for redemption that:

· Are signed by you in your legal capacity to sign on behalf of another person or entity (i.e., on behalf of an estate);

· Request a redemption check to be payable to anyone other than the shareholder(s) of record;

· Request a redemption check to be mailed to an address other than the address of record;

· Request redemption proceeds to be payable to a bank other than the bank account of record; or

· Total more than $100,000.

Institutional investors eligible to purchase Class I shares may redeem shares in excess of $100,000 in accounts held directly with the Fund without a guaranteed signature, provided that the proceeds are payable to the bank account of record and the redemption request otherwise is in good order.

Liquidity Management. The Fund has implemented measures designed to enable it to pay redemption proceeds in a timely fashion while maintaining adequate liquidity. The Fund’s portfolio management team continually monitors portfolio liquidity and adjusts the Fund’s cash level based on portfolio composition, redemption rates, market conditions, and other relevant criteria. Under normal circumstances, the Fund’s portfolio management team may meet redemption requests and manage liquidity by selling portfolio securities. Under certain circumstances, including

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stressed market conditions, the Fund’s portfolio management team may meet redemption requests and manage liquidity by (i) borrowing from a bank under a line of credit or from another Lord Abbett Fund (to the extent permitted under any SEC exemptive relief and the Fund’s investment restrictions, in each case as stated in the Fund’s SAI and/or prospectus, as applicable), (ii) transacting in exchange-traded funds and/or derivatives, or (iii) paying redemption proceeds in kind, as discussed below.

Despite the Fund’s reasonable best efforts, however, there can be no assurance that the Fund will manage liquidity successfully in all market environments. As a result, the Fund may not be able to pay redemption proceeds in a timely fashion because of unusual market conditions, an unusually high volume of redemption requests, or other factors.

Redemptions in Kind. The Fund reserves the right to pay redemption proceeds in whole or in part by distributing liquid securities from the Fund’s portfolio. It is not expected that the Fund would pay redemptions by an in kind distribution except in unusual and/or stressed circumstances. If the Fund pays redemption proceeds by distributing securities in kind, you could incur brokerage or other charges, and tax liability, and you will bear market risks until the distributed securities are converted into cash.

You should note that your purchase, exchange, and redemption requests may be subject to review and verification on an ongoing basis.

ACCOUNT SERVICES AND POLICIES