Before you invest, you may want to review the Portfolio’s Prospectus, which contains more information about the Portfolio and its risks. The Portfolio’s Prospectus and Statement of Additional Information (“SAI”), both dated May 1, 2026 (as revised or supplemented), are incorporated by reference into this Summary Prospectus. You can find the Portfolio’s Prospectus, SAI and other information about the Portfolio online at https://www.lazardassetmanagement.com/us/en_us/investment-solutions/how-to-invest/mutual-funds. You can also get this information at no cost by calling (800) 823-6300 or by sending an e-mail request to Contact.US@Lazard.com.

The Board of Directors of Lazard Retirement Series, Inc. has approved liquidation of the Lazard Retirement US Small Cap Equity Select Portfolio. No further investments are being accepted into the Portfolio.

Lazard Retirement US Small Cap Equity Select Portfolio

Investment Objective

The Portfolio seeks long-term capital appreciation.

Fees and Expenses

This table describes the fees and expenses that you may pay if you buy, hold and sell shares of the Portfolio, a series of Lazard Retirement Series, Inc. (the “Fund”), but does not reflect the fees or charges imposed by the separate accounts of certain insurance companies (the “Participating Insurance Companies”) under variable annuity contracts or variable life insurance policies (the “Policies” and each, a “Policy”). If such fees and charges were reflected, the figures in the table would be higher.

¹ Based on estimated amounts for the current fiscal year, using amounts for Service Shares from the last fiscal year.

² Reflects a contractual agreement by Lazard Asset Management LLC (the “Investment Manager”) to waive its fee and, if necessary, reimburse the Portfolio until May 1, 2027, to the extent Total Annual Portfolio Operating Expenses exceed 1.10% and .95% of the average daily net assets of the Portfolio’s Service Shares and Investor Shares, respectively, exclusive of taxes, brokerage, interest on borrowings, fees and expenses of “Acquired Funds,” fees and expenses related to filing foreign tax reclaims and extraordinary expenses. This expense limitation agreement can only be amended by agreement of the Fund, upon approval by the Fund’s Board of Directors, and the Investment Manager to lower the net amount shown and will terminate automatically in the event of termination of the Management Agreement between the Investment Manager and the Fund, on behalf of the Portfolio.

Example

This Example is intended to help you compare the cost of investing in the Portfolio with the cost of investing in other mutual funds.

The Example assumes that you invest $10,000 in the Portfolio for the time periods indicated and then hold or redeem all of your shares at the end of those periods. The Example also assumes that your investment has a 5% return each year

and that the Portfolio’s operating expenses remain the same, giving effect to the expense limitation agreement in year one only. The Example does not reflect fees and expenses imposed by the Participating Insurance Companies under the Policies; if they were reflected, the figures in the Example would be higher. Although your actual costs may be higher or lower, based on these assumptions your costs would be:

Portfolio Turnover

The Portfolio 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. These costs, which are not reflected in annual portfolio operating expenses or in the Example, affect the Portfolio’s performance. During the most recent fiscal year, the Portfolio’s portfolio turnover rate was 89% of the average value of its portfolio.

Principal Investment Strategies

Under normal circumstances, the Portfolio invests at least 80% of its assets in equity securities of small cap U.S. companies. The Investment Manager considers “small cap companies” to be those companies that, at the time of initial purchase by the Portfolio, have market capitalizations within the range of companies included in the Russell 2000^® Index (ranging from approximately $4.4 million to $38.0 billion as of March 31, 2026). Equity security investments primarily include common stocks. The Portfolio considers a company or issuer to be a “U.S. company” if: (i) the company/issuer is organized under the laws of or is domiciled in the U.S. or maintains its principal place of business in the U.S.; (ii) the security, or security of such company/issuer, is traded principally in the U.S.; or (iii) during the most recent fiscal year of the company/issuer, the company/issuer derived at least 50% of its revenues or profits from goods produced or sold, investments made, or services performed in the U.S. or that has at least 50% of its assets in the U.S.

The Investment Manager, through its bottom-up, fundamental research process, invests in companies it believes have strong and/or improving financial productivity and are undervalued based on their earnings, cash flow or asset values.

The Investment Manager focuses on relative value in seeking to construct a diversified portfolio of investments for the Portfolio that maintains sector and industry balance, using investment opportunities identified through bottom-up fundamental research conducted by the Investment Manager’s small cap and global research analysts.

The Portfolio may invest up to 20% of its assets in the securities of larger or smaller U.S. or non-U.S. companies.

Principal Investment Risks

The value of your investment in the Portfolio will fluctuate, which means you could lose money.

Market Risk: The Portfolio may incur losses due to declines in one or more markets in which it invests. These declines may be the result of, among other things, political, regulatory, market, economic or social developments affecting the relevant market(s). To the extent that such developments impact specific industries, market sectors, countries or geographic regions, the Portfolio’s investments in such industries, market sectors, countries and/or geographic regions can be expected to be particularly affected, especially if such investments are a significant portion of its investment portfolio. In addition, turbulence in financial markets and reduced liquidity in equity, credit and/or fixed income markets may negatively affect many issuers, which could adversely affect the Portfolio. Global economies and financial markets are increasingly interconnected, and conditions and events in one country, region or financial market may adversely impact issuers worldwide. As a result, local, regional or global events such as war or military conflict, acts of terrorism, the spread of infectious illness or other public health issues, social unrest, natural disasters, extreme weather, other geological events, man-made disasters, supply chain disruptions, deflation, inflation, government defaults, government shutdowns, the imposition of sanctions or other similar measures, recessions or other events could have a significant negative impact on global economic and market conditions. For example, a public health or other emergency and aggressive responses taken by many governments or voluntarily imposed by private parties, including closing borders, restricting travel and imposing prolonged quarantines or similar restrictions, as well as the closure of, or operational

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changes to, many retail and other businesses, may have severe negative impacts on markets worldwide. Additionally, general market conditions may affect the value of a Portfolio’s securities, including changes in interest rates, currency rates or monetary policies. Furthermore, the imposition of tariffs, trade restrictions, currency restrictions or similar actions (or retaliatory measures taken in response to such actions), or the threat or potential of one or more such events and developments, could lead to price volatility and overall declines in the U.S. and global investment markets.

Issuer Risk: The value of a security may decline for a number of reasons which directly relate to the issuer, such as management performance, financial leverage and reduced demand for the issuer’s goods or services, as well as the historical and prospective earnings of the issuer and the value of its assets or factors unrelated to the issuer’s value, such as investor perception.

Small and Mid Cap Companies Risk: Small and mid cap companies carry additional risks because their earnings tend to be less predictable, their share prices more volatile and their securities less liquid than larger, more established companies. The shares of small and mid cap companies tend to trade less frequently than those of larger companies, which can have an adverse effect on the pricing of these securities and on the ability to sell these securities when the Investment Manager deems it appropriate.

Value Investing Risk: Value investments are believed by the Investment Manager to be undervalued, but may not realize their perceived value for extended periods of time or may never realize their perceived value. These securities may respond differently to market and other developments than other types of securities.

Securities Selection Risk: Securities and other investments selected by the Investment Manager for the Portfolio may not perform to expectations. This could result in the Portfolio’s underperformance compared to other funds with similar investment objectives or strategies.

Performance Bar Chart and Table
Year-by-Year Total Returns for Service Shares
As of December 31, 2025

The accompanying bar chart and table provide some indication of the risks of investing in Lazard Retirement US Small Cap Equity Select Portfolio by showing the Portfolio’s year-by-year performance and its average annual performance compared to that of a broad measure of market performance and an index that is generally more representative of the types of market sectors and/or types of investments in which the Portfolio invests. The bar chart shows how the performance of the Portfolio’s Service Shares has varied from year to year over the past 10 calendar years. Effective September 1, 2023, certain changes were made to the Portfolio’s principal investments strategies, including removing mid-capitalization companies from its policy with respect to the investment of 80% of its assets. The Portfolio’s performance information prior to September 1, 2023 relates only to the Portfolio’s prior principal investment strategies. Performance information does not reflect the fees or charges imposed by the Participating Insurance Companies under the Policies, and such fees will have the effect of reducing performance. Updated performance information is available at www.lazardassetmanagement.com or by calling (800) 823-6300. The Portfolio’s past performance is not necessarily an indication of how the Portfolio will perform in the future.

Calendar Years ended December 31

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Average Annual Total Returns
(for the periods ended December 31, 2025)

The Russell 3000 Index measures the performance of the largest 3,000 U.S. companies designed to represent approximately 98% of the investable U.S. equity market.

The Russell 2000 Index measures the performance of the small-cap segment of the U.S. equity universe. The Russell 2000 Index is a subset of the Russell 3000 Index which is designed to represent approximately 98% of the investable U.S. equity market. It includes approximately 2,000 of the smallest securities based on a combination of their market cap and current index membership.

Indexes are unmanaged and have no fees. One cannot invest directly in an index.

Management

Investment Manager

Lazard Asset Management LLC

Portfolio Managers/Analysts

Scott Kolar, portfolio manager/analyst on the Investment Manager’s US Small Cap Equity Select and Global Small Cap Equity teams, has been with the Portfolio since December 2023.

Sean Gallagher, portfolio manager/analyst on various of the Investment Manager’s US and global equity strategies and Global Head of the Investment Manager’s Small Cap Equity platform, has been with the Portfolio since December 2023.

Michael DeBernardis, portfolio manager/analyst on the Investment Manager’s US Small Cap Equity Select and Global Small Cap Equity teams, has been with the Portfolio since October 2010.

Martin Flood, portfolio manager/analyst on various of the Investment Manager’s US Equity and Global Equity teams, has been with the Portfolio since December 2014.

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Purchase and Sale of Portfolio Shares

Portfolio shares are currently offered only to Participating Insurance Companies. Portfolio shares may be sold each business day by the separate accounts of the Participating Insurance Companies.

Tax Information

Owners of the Policies offered by the separate accounts of Participating Insurance Companies should consult the prospectuses or other disclosure documents of the separate accounts regarding the federal tax consequences of investing in a Portfolio through a separate account.

Financial Intermediary Compensation
Payments to Participating Insurance Companies and Financial Intermediaries

The Portfolios and the Investment Manager and its affiliates may pay Participating Insurance Companies, or their affiliates, for the sale of Portfolio shares and related services. Participating Insurance Companies, or their affiliates, may pay broker-dealers or other financial intermediaries that sell Policies for the sale of shares of a Portfolio and related services. When received by a Participating Insurance Company, such payments may be a factor that the Participating Insurance Company considers in including a Portfolio as an investment option in its Policies. The prospectus or other disclosure document for the Policies may contain additional information about these payments. When received by a financial intermediary, such payments may create a conflict of interest by influencing the financial intermediary and salespersons to recommend a Portfolio over other mutual funds available as investment options under a Policy. Ask the salesperson or visit the financial intermediary’s website for more information.