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EQ/Common Stock Index Portfolio

EQ/Common Stock Index Portfolio – Class IA, IB and K Shares

Investment Objective:

Seeks to achieve a total return before expenses that approximates the total return performance of the Russell 3000® Index, including reinvestment of dividends, at a risk level consistent with that of the Russell 3000 Index.

FEES AND EXPENSES OF THE PORTFOLIO

The following table describes the fees and expenses that you may pay if you buy, hold, and sell shares of the Portfolio. The table below does not reflect any fees and expenses associated with variable life insurance contracts and variable annuity certificates and contracts (“Contracts”), which would increase overall fees and expenses. See the Contract prospectus for a description of those fees and expenses.

Shareholder Fees (fees paid directly from your investment)

Shareholder Fees - EQ/Common Stock Index Portfolio - USD ($)	Class IA Shares	Class IB Shares	Class K Shares
Shareholder Fees (fees paid directly from your investment)

Annual Portfolio Operating Expenses(expenses that you pay each year as a percentage of thevalue of your investment)

Annual Fund Operating Expenses - EQ/Common Stock Index Portfolio		Class IA Shares	Class IB Shares	Class K Shares
Management Fee		0.32%	0.32%	0.32%
Distribution and/or Service Fees (12b-1 fees)		0.25%	0.25%	none
Other Expenses		0.12%	0.12%	0.12%	[1]
Total Annual Portfolio Operating Expenses		0.69%	0.69%	0.44%
Fee Waiver and/or Expense Reimbursement	[2],[3]	(0.01%)	(0.01%)	(0.01%)
Total Annual Portfolio Operating Expenses After Fee Waiver and/or Expense Reimbursement		0.68%	0.68%	0.43%

Example

This Example is intended to help you compare the cost of investing in the Portfolio with the cost of investing in other portfolios. The Example assumes that you invest $10,000 in the Portfolio for the periods indicated, that your investment has a 5% return each year, that the Portfolio’s operating expenses remain the same, and that the Expense Limitation Arrangement is not renewed. This Example does not reflect any Contract-related fees and expenses including redemption fees (if any) at the Contract level. If such fees and expenses were reflected, the total expenses would be higher. Although your actual costs may be higher or lower, based on these assumptions, whether you redeem or hold your shares, your costs would be:

Expense Example - EQ/Common Stock Index Portfolio - USD ($)	1 Year	3 Years	5 Years	10 Years
Class IA Shares	69	220	383	858
Class IB Shares	69	220	383	858
Class K Shares	44	140	245	554

Expense Example, No Redemption - EQ/Common Stock Index Portfolio - USD ($)	1 Year	3 Years	5 Years	10 Years
Class IA Shares	69	220	383	858
Class IB Shares	69	220	383	858
Class K Shares	44	140	245	554

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 fund operating expenses or in the Example, affect the Portfolio’s performance. During the most recent fiscal year, the Portfolio’s portfolio turnover rate was 4% of the average value of the Portfolio.

INVESTMENTS, RISKS, AND PERFORMANCEPrincipal Investment Strategy:

The Portfolio generally invests at least 80% of its net assets, plus borrowings for investment purposes, in common stocks of companies represented in the Russell 3000® Index (“Russell 3000”). The Russell 3000 is an unmanaged index that measures the performance of the 3,000 largest U.S. companies based on total market capitalizations, which represents approximately 98% of the investable U.S. equity market.

The Portfolio’s investments are selected by a stratified sampling construction process in which the Sub-Adviser selects a subset of the 3,000 companies in the Russell 3000 based on the Sub-Adviser’s analysis of key risk factors and other characteristics. Such factors include industry weightings, market capitalizations, return variability, and yield. This strategy is commonly referred to as an indexing strategy. The Portfolio will concentrate its investments (i.e., invest 25% or more of its total assets) in securities of issuers in a particular industry or group of industries to approximately the same extent that the Russell 3000 is concentrated.

The Portfolio also may lend its portfolio securities to earn additional income.

Principal Risks:

An investment in the Portfolio is not a deposit of a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency. The value of your investment may fall, sometimes sharply, and you could lose money by investing in the Portfolio. There can be no assurance that the Portfolio will achieve its investment objective.

The following risks can negatively affect the Portfolio’s performance. The most significant risks as of the date of this Prospectus are listed first, followed by additional risks in alphabetical order.

Market Risk: The Portfolio is subject to the risk that the securities markets will move down, sometimes rapidly and unpredictably, based on overall economic conditions and other factors, which may negatively affect Portfolio performance. Securities markets also may experience long periods of decline in value. Changes in the financial condition of a single issuer can impact a market as a whole. Geo-political risks, including terrorism, tensions or open conflict between nations, or political or economic dysfunction within some nations that are major players on the world stage, may lead to instability in world economies and markets, may lead to increased market volatility, and may have adverse long-term effects. Events such as natural disasters, public health crises (such as epidemics and pandemics) and social unrest, and governments’ reactions to such events, could cause uncertainty in the markets and may adversely affect the performance of the global economy. Adverse market conditions may not have the same impact on all types of securities. In addition, markets and market participants are increasingly reliant on information data systems. Inaccurate data, software or other technology malfunctions, programming inaccuracies, unauthorized use or access, and similar circumstances may impair the performance of these systems and may have an adverse impact upon a single issuer, a group of issuers, or the market at-large.

Equity Risk: In general, the values of stocks and other equity securities fluctuate, and sometimes widely fluctuate, in response to changes in a company’s financial condition as well as general market, economic and political conditions and other factors.

Large-Cap Company Risk: Larger more established companies may be unable to respond quickly to new competitive challenges such as changes in technology and consumer tastes, which may lead to a decline in their market price. Many larger companies also may not be able to attain the high growth rate of successful smaller companies, especially during extended periods of economic expansion.

Mid-Cap and Small-Cap Company Risk: Mid-cap and small-cap companies carry additional risks because the operating histories of these companies tend to be more limited, their earnings and revenues less predictable (and some companies may be experiencing significant losses), and their share prices more volatile than those of larger, more established companies, all of which can negatively affect their value. In general, these risks are greater for small-cap companies than for mid-cap companies.

Index Strategy Risk: The Portfolio employs an index strategy and generally will not modify its index strategy to respond to changes in market trends or the economy, which means that the Portfolio may be particularly susceptible to a general decline in the market segment relating to the relevant index. In addition, although the index strategy attempts to closely track the relevant index, the Portfolio may not invest in all of the securities in the index. Therefore, there can be no assurance that the performance of the index strategy will match that of the relevant index. To the extent the Portfolio utilizes a representative sampling approach, it may experience tracking error to a greater extent than if the Portfolio sought to replicate the index.

To the extent that the securities of a limited number of companies represent a significant percentage of the relevant index, the Portfolio may be subject to more risk because changes in the value of a single security may have a more significant effect, either positive or negative, on the Portfolio’s net asset value. The Portfolio may experience greater performance volatility than a portfolio that seeks to track the performance of an index that is more broadly diversified.

Sector Risk: From time to time, based on market or economic conditions, the Portfolio may have significant positions in one or more sectors of the market. To the extent the Portfolio invests more heavily in particular sectors, its performance will be especially sensitive to developments that significantly affect those sectors. Individual sectors may be more volatile, and may perform differently, than the broader market. The industries that constitute a sector may all react in the same way to economic, political or regulatory events.

Derivatives Risk: The Portfolio’s investments in derivatives may rise or fall in value more rapidly than other investments and may reduce the Portfolio’s returns and increase the volatility of the Portfolio’s net asset value. Investing in derivatives involves investment techniques and risk analyses different from, and risks in some respects greater than, those associated with investing in more traditional investments, such as stocks and bonds. Derivatives may be leveraged such that a small investment can have a significant impact on the Portfolio’s exposure to stock market values, interest rates, or other investments. As a result, a relatively small price movement in a derivatives contract may cause an immediate and substantial loss, and the Portfolio could lose more than the amount it invested. Some derivatives can have the potential

for unlimited losses. In addition, it may be difficult or impossible for the Portfolio to purchase or sell certain derivatives in sufficient amounts to achieve the desired level of exposure, or to terminate or offset existing arrangements, which may result in a loss or may be costly to the Portfolio. Some derivatives are more sensitive to market price fluctuations and to interest rate changes than other investments. Derivatives may not behave as anticipated by the Portfolio, and derivatives strategies that are successful under certain market conditions may be less successful or unsuccessful under other market conditions. The Portfolio also may be exposed to losses if the counterparty in the transaction is unable or unwilling to fulfill its contractual obligation. In certain cases, the Portfolio may be hindered or delayed in exercising remedies against or closing out derivatives with a counterparty, resulting in additional losses. Derivatives also may be subject to the risk of mispricing or improper valuation. Derivatives can be difficult to value, and valuation may be more difficult in times of market turmoil. Changing regulation may make derivatives more costly, limit their availability, impact the Portfolio’s ability to maintain its investments in derivatives, disrupt markets, or otherwise adversely affect their value or performance.

Portfolio Management Risk: The Portfolio is subject to the risk that strategies used by an investment manager and its securities selections fail to produce the intended results. An investment manager’s judgments or decisions about the quality, relative yield or value of, or market trends affecting, a particular security or issuer, industry, sector, region or market segment, or about the economy or interest rates, may be incorrect or otherwise may not produce the intended results, which may result in losses to the Portfolio. In addition, many processes used in Portfolio management, including security selection, rely, in whole or in part, on the use of various technologies. The Portfolio may suffer losses if there are imperfections, errors or limitations in the quantitative, analytic or other tools, resources, information and data used, or the analyses employed or relied on, by an investment manager, or if such tools, resources, information or data are used incorrectly, fail to produce the desired results, or otherwise do not work as intended. There can be no assurance that the use of these technologies will result in effective investment decisions for the Portfolio.

Securities Lending Risk: The Portfolio may lend its portfolio securities to seek income. There is a risk that a borrower may default on its obligations to return loaned securities. The Portfolio will be responsible for the risks associated with the investment of cash collateral and may lose money on its investment of cash collateral or may fail to earn sufficient income on its investment to meet obligations to the borrower. Securities lending may introduce leverage into the Portfolio. In addition, delays may occur in the recovery of loaned securities from borrowers, which could interfere with the Portfolio’s ability to vote proxies or to settle transactions.

Risk/Return Bar Chart and Table

The bar chart and table below provide some indication of the risks of investing in the Portfolio by showing changes in the Portfolio’s performance from year to year and by showing how the Portfolio’s average annual total returns for the past one, five and ten years through December 31, 2020 compared to the returns of a broad-based securities market index. Past performance is not an indication of future performance.

Class K shares have not commenced operations as of the date of this Prospectus.

The performance results do not reflect any Contract-related fees and expenses, which would reduce the performance results.

Calendar Year Annual Total Returns — Class IB

Best quarter (% and time period)	Worst quarter (% and time period)
21.68% (2020 2nd Quarter)	–20.88% (2020 1st Quarter)

Average Annual Total Returns

Average Annual Total Returns - EQ/Common Stock Index Portfolio	One Year	Five Years	Ten Years
Class IA Shares	19.77%	14.60%	13.07%
Class IB Shares	19.76%	14.61%	13.04%
Russell 3000® Index (reflects no deduction for fees, expenses, or taxes)	20.89%	15.43%	13.79%

[1] Based on estimated amounts for the current fiscal year.

[2] Fee Waiver and/or Expense Reimbursement information has been restated to reflect the current Expense Limitation Arrangement.

[3] Pursuant to a contract, Equitable Investment Management Group, LLC (the “Adviser”) has agreed to make payments or waive its management, administrative and other fees to limit the expenses of the Portfolio through April 30, 2022 (unless the Board of Trustees consents to an earlier revision or termination of this arrangement) (“Expense Limitation Arrangement”) so that the annual operating expenses of the Portfolio (exclusive of taxes, interest, brokerage commissions, capitalized expenses, acquired fund fees and expenses, dividend and interest expenses on securities sold short, and extraordinary expenses not incurred in the ordinary course of the Portfolio’s business) do not exceed an annual rate of average daily net assets of 0.68% for Class IA and Class IB shares and 0.43% for Class K shares of the Portfolio. The Expense Limitation Arrangement may be terminated by the Adviser at any time after April 30, 2022. The Adviser may be reimbursed the amount of any such payments or waivers made after June 30, 2020, in the future provided that the payments or waivers are reimbursed within three years of the payments or waivers being recorded and the Portfolio’s expense ratio, after the reimbursement is taken into account, does not exceed the Portfolio’s expense cap at the time of the waiver or the Portfolio’s expense cap at the time of the reimbursement, whichever is lower.