Summary Prospectus – April 27, 2020

JNL Conservative Allocation Fund

Class A

Class I

Before you invest, you may want to review the Fund’s Prospectus, which contains more information about the Fund and its risks. You can find the Fund’s Prospectus and other information about the Fund, including the Statement of Additional Information (“SAI”) and most recent reports to shareholders, online at http://hosted.rightprospectus.com/Jackson/JNLSeriesTrust. You can also get this information at no cost by calling 1-800-644-4565 (Annuity and Life Service Center), 1-800-599-5651 (NY Annuity and Life Service Center), 1-800-777-7779 (for contracts purchased through a bank or financial institution) or 1-888-464-7779 (for NY contracts purchased through a bank or financial institution), or by sending an email request to ProspectusRequest@jackson.com. The current Prospectus and SAI, both dated April 27, 2020, as amended, are incorporated by reference into (which means they legally are a part of) this Summary Prospectus.

Beginning on January 1, 2021, as permitted by regulations adopted by the Securities and Exchange Commission, paper copies of the Funds’ annual and semi annual shareholder reports will no longer be sent by mail, unless you specifically request paper copies of the reports from Jackson. Instead, the reports will be made available on Jackson’s website (www.jackson.com), and you will be notified by mail each time a report is posted and provided with a website link to access the report.

If you already elected to receive shareholder reports electronically, you will not be affected by this change and you need not take any action. You may elect to receive shareholder reports and other communications from Jackson electronically by doing one of the following:

•	Mailing in the postage-paid card on the cover of this report;

•	Calling 1-866-349-4564; or

•	Signing up on www.jackson.com

Beginning on January 1, 2019, you may elect to receive all future reports in paper free of charge. You can inform Jackson that you wish to continue receiving paper copies of your shareholder reports by contacting the appropriate Jackson Service Center. Your election to receive reports in paper will apply to all Funds held in each variable contract you purchased from Jackson.

Investment Objective. The investment objective of the Fund is to seek the generation of income through investment in other funds (the “Underlying Funds”).

Expenses. This table describes the fees and expenses that you may pay if you buy and hold shares of the Fund.

The expenses do not reflect the expenses of the variable insurance contracts or the separate account through which you indirectly invest in the Fund, whichever may be applicable, and the total expenses would be higher if they were included.

Shareholder Fees
(fees paid directly from your investment)
Not Applicable

Annual Fund Operating Expenses (Expenses that you pay each year as a percentage of the value of your investment)
	Class A
Management Fee	0.13%
Distribution and/or Service (12b-1) Fees	0.30%
Other Expenses¹	0.05%
Acquired Fund Fees and Expenses²	0.70%
Total Annual Fund Operating Expenses³	1.18%

¹	"Other Expenses" include an Administrative Fee of 0.05% which is payable to Jackson National Asset Management, LLC ("JNAM" or "Adviser").
²	Acquired Fund Fees and Expenses are the indirect expenses of investing in other investment companies. Accordingly, the expense ratio presented in the Financial Highlights section of the prospectus will not correlate to the Total Annual Fund Operating Expenses disclosed above.
³	Expense information has been restated to reflect current fees.

Annual Fund Operating Expenses (Expenses that you pay each year as a percentage of the value of your investment)
	Class I
Management Fee	0.13%
Distribution and/or Service (12b-1) Fees	0.00%
Other Expenses¹	0.06%
Acquired Fund Fees and Expenses²	0.70%
Total Annual Fund Operating Expenses³	0.89%

¹	"Other Expenses" include an Administrative Fee of 0.05% which is payable to Jackson National Asset Management, LLC ("JNAM" or "Adviser").
²	Acquired Fund Fees and Expenses are the indirect expenses of investing in other investment companies. Accordingly, the expense ratio presented in the Financial Highlights section of the prospectus will not correlate to the Total Annual Fund Operating Expenses disclosed above.
³	Expense information has been restated to reflect current fees.

Expense Example. This example is intended to help you compare the cost of investing in the Fund with the cost of investing in other mutual funds. Also, this example does not reflect the expenses of the variable insurance contracts or the separate account through which you indirectly invest in the Fund, whichever may be applicable, and the total expenses would be higher if they were included. The table below shows the expenses you would pay on a $10,000 investment, assuming (1) 5% annual return; (2) redemption at the end of each time period; and (3) that the Fund operating expenses remain the same. Although your actual costs may be higher or lower, based on these assumptions, your costs would be:

JNL Conservative Allocation Fund Class A
1 year	3 years	5 years	10 years
$120	$375	$649	$1,432

JNL Conservative Allocation Fund Class I
1 year	3 years	5 years	10 years
$91	$284	$493	$1,096

Portfolio Turnover (% of average value of portfolio). 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. These costs, which are not reflected in Annual Fund Operating Expenses or in the Expense Example above, affect the Fund’s performance.

Period
1/1/2019 - 12/31/2019	32	%

Principal Investment Strategies. The Fund seeks to achieve its objective by investing in Class I shares of the Underlying Funds. The Fund allocates its assets to Underlying Funds that invest primarily in fixed income and other income-oriented securities (including high-yield (“junk”) bonds) of issuers in the U.S. and foreign countries, including emerging markets. The Underlying Funds in which the Fund may invest each are a separate series of the JNL Series Trust and JNL Investors Series Trust. Not all Funds of the JNL Series Trust and JNL Investors Series Trust are available as Underlying Funds. Please refer to the “Additional Information About Each Fund” section of the Prospectus for a list of available Underlying Funds.

Under normal circumstances, the Fund allocates approximately 0% to 40% of its assets to Underlying Funds that invest primarily in equity securities, 60% to 100% to Underlying Funds that invest primarily in fixed-income securities and 0% to 20% of its assets to Underlying Funds that invest primarily in money market securities.

The Fund allocates its assets among Underlying Funds categorized by the Adviser into the following investment categories:

•	Alternative Assets

•	Alternative Strategies

•	Domestic/Global Equity

•	Domestic/Global Fixed-income

•	International

•	International Fixed-Income

•

Sector

•	Tactical Management

The Fund considers the Underlying Funds in the Domestic/Global Fixed Income and International Fixed Income investment categories to be funds that invest primarily in fixed income securities, and the Underlying Funds in the Domestic/Global Equity, International, Sector, and Specialty investment categories to be funds that invest primarily in equity securities. The Underlying Funds in the Risk Management and Tactical Management investment categories include funds that can invest in a variety of asset classes in various proportions, may take measures to manage risk and/or adapt to prevailing market conditions and may have significant exposure to both fixed income and equity securities. To the extent the Fund invests in one of these Underlying Funds, the Fund’s exposure to fixed income securities and equity securities will be allocated according to the Underlying Fund’s relative exposure to these asset classes. The Fund considers the Underlying Funds in the Alternative Assets and Alternative Strategies investment categories to be funds that invest primarily in alternative assets and employ alternative strategies.

Each Underlying Fund has its own investment objective and invests in certain types of securities or other assets in order to implement its investment strategy and seek to achieve its investment objective. Those types of securities or other assets include, but are not limited to: equity securities (such as common stock, preferred stock, and convertible securities), equity futures, equity swaps, currency forwards, currency futures, commodity futures and swaps, bond futures, fixed income swaps, interest rate swaps, and inflation swaps; U.S. and foreign government bonds, including inflation protected bonds (such as Treasury Inflation Protected Securities); bank loans; cash and cash equivalents, including but not limited to money market fund shares. These holdings can include investment exposure to both developed and emerging markets, and may be illiquid or thinly traded. Securities held by the Underlying Funds may be denominated in U.S. and/or non-U.S. currencies.

An Underlying Fund may be leveraged and therefore could be subject to a heightened risk of loss. The leverage involved in certain derivative transactions may result in an Underlying Fund’s net asset value being more sensitive to changes in the value of the related investment.

Some of the Underlying Funds, particularly those classified as fixed-income strategies, may hold a significant amount of asset-backed securities, mortgage-backed securities, derivatives, and/or junk bonds in order to execute their investment strategies.

In determining allocations to any particular Underlying Fund, the Adviser considers, among other things, long-term market and economic conditions, historical performance of each Underlying Fund, and expected long-term performance of each Underlying Fund, as well as diversification to control overall portfolio risk exposure.

The Adviser may change the Underlying Funds in which the Fund invests from time to time at its discretion without notice or shareholder approval. Therefore, the Fund may invest in Underlying Funds that are not listed in the statutory prospectus.

Principal Risks of Investing in the Fund. An investment in the Fund is not guaranteed. As with any mutual fund, the value of the Fund’s shares will change, and you could lose money by investing in the Fund. The principal risks associated with investing in the Underlying Funds include:

•

Allocation risk – The Fund’s ability to achieve its investment objective depends upon the investment manager’s analysis of such factors as macroeconomic trends, outlooks for various industries and asset class valuations, and its ability to select an appropriate mix of asset classes and Underlying Funds based on its analysis of such factors. The Fund is subject to the risk of changes in market, investment, and economic conditions in the selection and percentages of allocations among Underlying Funds.

•	Underlying funds risk – The ability of the Fund to achieve its investment objective will depend in part upon the allocations of investments in the Underlying Funds and their ability to achieve their investment objectives.

•

Market risk – Portfolio securities may decline in value due to factors affecting securities markets generally, such as real or perceived adverse economic, political, or regulatory conditions, inflation, changes in interest or currency rates or adverse investor sentiment, public health issues, war, terrorism or natural disasters, among others. Adverse market conditions may be prolonged and may not have the same impact on all types of securities. The values of securities may fall due to factors affecting a particular issuer, industry or the securities market as a whole.

•

Equity securities risk – Common and preferred stocks represent equity ownership in a company. Stock markets are volatile, and equity securities generally have greater price volatility than fixed-income securities. The price of equity or equity-related securities will fluctuate and can decline and reduce the value of a portfolio investing in equity or equity-related securities. The value of equity or equity-related securities purchased by an Underlying Fund could decline if the financial condition of the companies an Underlying Fund invests in decline or if overall market and economic conditions deteriorate. They may also decline due to factors that affect a particular industry or industries, such as labor shortages or an increase in production costs and competitive conditions within an industry. In addition, they may decline due to general market conditions that are not specifically related to a company or industry, such as real or perceived adverse economic conditions, changes in the general outlook for corporate earnings, changes in interest or currency rates or generally adverse investor sentiment.

•

Mid-capitalization and small-capitalization investing risk – The securities of mid-capitalization and small-capitalization companies involve greater risks than those associated with larger, more established companies and may be subject to more abrupt or erratic price movements. Securities of such issuers may lack sufficient market liquidity to enable a Fund to effect sales at an advantageous time or without a substantial drop in price. Both mid-capitalization and small-capitalization companies often have narrower markets and more limited managerial and financial resources than larger, more established companies. As a result, their performance can be more volatile and they face greater risk of business failure, which could increase the volatility of a Fund’s portfolio. Generally, the smaller the company size, the greater these risks become.

•

Fixed-income risk – The price of fixed-income securities responds to economic developments, particularly interest rate changes, as well as to perceptions about the credit risk of individual issuers. Rising interest rates generally will cause the price of bonds and other fixed-income debt securities to fall. Falling interest rates may cause an issuer to redeem, call or refinance a security before its stated maturity, which may result in the Fund having to reinvest the proceeds in lower yielding securities. Bonds and other fixed-income debt securities are subject to credit risk, which is the possibility that the credit strength of an issuer will weaken and/or an issuer of a fixed-income security will fail to make timely payments of principal or interest and the security will go into default.

•

Interest rate risk – When interest rates increase, fixed-income securities generally will decline in value. Long-term fixed income securities normally have more price volatility than short-term fixed income securities. The value of certain equity investments, such as utilities and real estate-related securities, may also be sensitive to interest rate changes.

•

Credit risk – The price of a debt instrument can decline in response to changes in the financial condition of the issuer, borrower, guarantor, counterparty, or other entity responsible for payment. An Underlying Fund could lose money if the issuer or guarantor of a fixed-income security, or the counterparty to a derivatives contract, repurchase agreement or a loan of portfolio securities, is unable or unwilling to make timely principal and/or interest payments, or to otherwise honor its obligations.

•

Emerging markets and less developed countries risk – Emerging market and less developed countries generally are located in Asia, the Middle East, Eastern Europe, Central and South America and Africa. Investments in, or exposure to, securities that are tied economically to emerging market and less developed countries are subject to all of the risks of investments in, or exposure to, foreign securities, generally to a greater extent than in developed markets, among other risks. Investments in securities that are tied economically to emerging markets involve greater risk from economic and political systems that typically are less developed, and likely to be less stable, than those in more advanced countries. The Fund also will be subject to the risk of adverse foreign currency rate fluctuations. Emerging market and less developed countries may also have economies that are predominantly based on only a few industries or dependent on revenues from particular commodities. The risks of nationalization, expropriation or other confiscation of assets of non-U.S. issuers is also greater in emerging and less developed countries. As a result of these risks, investments in securities tied economically to emerging markets tend to be more volatile than investments in securities of developed countries.

•

High-yield bonds, lower-rated bonds, and unrated securities risk – High-yield bonds, lower-rated bonds, and unrated securities are broadly referred to as “junk bonds,” and are considered below “investment-grade” by national ratings agencies. Junk bonds are subject to the increased risk of an issuer’s inability to meet principal and interest payment obligations. As a result, an investment in junk bonds is considered speculative. High-yield bonds may be subject to liquidity risk, and the Fund may not be able to sell a high-yield bond at the price at which it is currently valued.

•

Investment in other investment companies risk – As with other investments, investments in other investment companies are subject to market and selection risk. In addition, if the Fund acquires shares of investment companies, including ones affiliated with the Fund, shareholders bear both their proportionate share of expenses in the Fund (including management and advisory fees) and, indirectly, the expenses of the investment companies in which the Fund invests. To the extent that shares of the Fund are held by an affiliated fund, the ability of the Fund itself to invest in other investment companies may be limited.

•

Foreign regulatory risk – The Adviser is an indirect wholly owned subsidiary of Prudential plc, a publicly traded company incorporated in the United Kingdom and is not affiliated in any manner with Prudential Financial Inc., a company whose principal place of business is in the United States of America or with The Prudential Assurance Company Ltd, a subsidiary of M&G plc, a company incorporated in the United Kingdom. Through its ownership structure, the Adviser has a number of global financial industry affiliates. As a result of this structure, and the asset management and financial industry business activities of the Adviser and its affiliates, the Adviser and the Fund may be prohibited or limited in effecting transactions in certain securities. Additionally, the Adviser and the Fund may encounter trading limitations or restrictions because of aggregation issues or other foreign regulatory requirements. Foreign regulators or foreign laws may impose position limits on securities held by the Fund, and the Fund may be limited as to which securities it may purchase or sell, as well as the timing of such purchases or sales. These foreign regulatory limits may increase the Fund’s expenses and may limit the Fund’s performance.

Performance. The performance information shown provides some indication of the risks of investing in the Fund by showing changes in the Fund’s performance from year to year and by showing how the Fund’s average annual returns compared with those of broad-based securities market indices and a composite index which have investment characteristics similar to those of the Fund. The Fund’s past performance is not necessarily an indication of how the Fund will perform in the future.

The returns shown in the bar chart and table do not include charges that will be imposed by variable insurance products. If these amounts were reflected, returns would be less than those shown.

The performance data includes the performance of the Fund, then a series of the Jackson Variable Series Trust for periods before the Fund’s registration statement became effective. Effective April 27, 2020, the Fund will be combined with JNL/Nicholas Convertible Arbitrage Fund (the “Acquired Fund”), a series of Jackson Variable Series Trust, with the Fund as the surviving Fund. The performance shown is the Fund's historic performance and does not reflect the performance of the Acquired Fund.

Effective June 24, 2019, for consistency with the Fund's principal investment strategies, the Fund replaced the Dow Jones Conservative Index with the Morningstar Conservative Target Risk Index as the Fund's primary benchmark.

Consistent with the Fund's principal investment strategies, the Fund uses the 20% MSCI All Country World Index (Net), 80% Bloomberg Barclays U.S. Aggregate Bond Index as the Fund's secondary benchmark.

Annual Total Returns as of December 31

Class A

Best Quarter (ended 3/31/2019): 6.01%; Worst Quarter (ended 6/30/2013): -3.23%

Annual Total Returns as of December 31

Class I

Best Quarter (ended 3/31/2019): 6.08%; Worst Quarter (ended 12/31/2018): -3.03%

Average Annual Total Returns as of 12/31/2019
	1 year		5 year		Life of Fund (February 06, 2012)
JNL Conservative Allocation Fund (Class A)	12.46	%	3.84	%	3.79	%
Morningstar Conservative Target Risk Index (reflects no deduction for fees, expenses, or taxes)	11.22	%	4.05	%	3.97	%
20% MSCI All Country World Index (Net), 80% Bloomberg Barclays U.S. Aggregate Bond Index (reflects no deduction for fees, expenses, or taxes)	12.26	%	4.23	%	4.26	%
Dow Jones Conservative Index (reflects no deduction for fees, expenses, or taxes)	8.13	%	3.07	%	3.00	%
MSCI All Country World Index (Net) (reflects no deduction for fees, expenses, or taxes)	26.60	%	8.41	%	9.49	%
Bloomberg Barclays U.S. Aggregate Bond Index (reflects no deduction for fees, expenses, or taxes)	8.72	%	3.05	%	2.85	%

Average Annual Total Returns as of 12/31/2019
	1 year		Life of Class (September 25, 2017)
JNL Conservative Allocation Fund (Class I)	12.76	%	4.76	%
Morningstar Conservative Target Risk Index (reflects no deduction for fees, expenses, or taxes)	11.22	%	4.88	%
20% MSCI All Country World Index (Net), 80% Bloomberg Barclays U.S. Aggregate Bond Index (reflects no deduction for fees, expenses, or taxes)	12.26	%	5.04	%
Dow Jones Conservative Index (reflects no deduction for fees, expenses, or taxes)	8.13	%	3.81	%
MSCI All Country World Index (Net) (reflects no deduction for fees, expenses, or taxes)	26.60	%	8.92	%
Bloomberg Barclays U.S. Aggregate Bond Index (reflects no deduction for fees, expenses, or taxes)	8.72	%	3.89	%

Portfolio Management.

Investment Adviser to the Fund:
Jackson National Asset Management, LLC (“JNAM”)

Portfolio Managers:

Name:	Joined Fund Management Team In:	Title:
William Harding, CFA	April 2015	Senior Vice President, Chief Investment Officer and Portfolio Manager, JNAM
Sean Hynes, CFA, CAIA	April 2015	Assistant Vice President and Portfolio Manager, JNAM
Mark Pliska, CFA	April 2015	Portfolio Manager, JNAM

Purchase and Redemption of Fund Shares

Only separate accounts of Jackson National Life Insurance Company (“Jackson”) or Jackson National Life Insurance Company of New York (“Jackson NY”) and series, including fund of funds, of registered investment companies in which either or both of those insurance companies invest may purchase shares of the Fund. You may invest indirectly in the Fund through your purchase of a variable annuity or life insurance contract issued by a separate account of Jackson or Jackson NY that invests directly, or through a fund of funds, in this Fund. Any minimum initial or subsequent investment requirements and redemption procedures are governed by the applicable separate account through which you invest indirectly.

This Fund serves as an underlying investment by insurance companies, affiliated investment companies, and retirement plans for funding variable annuity and life insurance contracts and retirement plans.

Tax Information

The Fund expects to be treated as a partnership for U.S. federal income tax purposes, and does not expect to make regular distributions (other than in redemption of Fund shares) to shareholders, which generally are the participating insurance companies investing in the Fund through separate accounts of Jackson or Jackson NY and mutual funds owned directly or indirectly by such separate accounts. You should consult the prospectus of the appropriate separate account or description of the plan for a discussion of the U.S. federal income tax consequences to you of your contract, policy, or plan.

Payments to Broker-Dealers and Financial Intermediaries

If you invest in the Fund under a variable insurance contract or a plan that offers a variable insurance contract as a plan option through a broker-dealer or other financial intermediary (such as a financial institution), the Fund and its related companies 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 intermediary and your salesperson to recommend the Fund over another investment. Ask your salesperson or visit your financial intermediary’s Website for more information.