# EDGAR Filing Document

**Accession Number:** 0000933691
**File Stem:** 0000933691-26-000327
**Filing Date:** 2026-4
**Character Count:** 24193
**Document Hash:** ff7a0928ad2d03e191abcd09e5218ea3
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0000933691-26-000327.hdr.sgml**: 20260427

**ACCESSION NUMBER**: 0000933691-26-000327

**CONFORMED SUBMISSION TYPE**: 497K

**PUBLIC DOCUMENT COUNT**: 3

**FILED AS OF DATE**: 20260427

**DATE AS OF CHANGE**: 20260427

**EFFECTIVENESS DATE**: 20260427

**FILER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** JNL SERIES TRUST
- **CENTRAL INDEX KEY:** 0000933691

**ORGANIZATION NAME:**
- **EIN:** 381659835
- **STATE OF INCORPORATION:** MA
- **FISCAL YEAR END:** 1231

**FILING VALUES:**
- **FORM TYPE:** 497K
- **SEC ACT:** 1933 Act
- **SEC FILE NUMBER:** 033-87244
- **FILM NUMBER:** 26897200

**BUSINESS ADDRESS:**
- **STREET 1:** 1 CORPORATE WAY
- **CITY:** LANSING
- **STATE:** MI
- **ZIP:** 48951
- **BUSINESS PHONE:** (517) 367-4336

**MAIL ADDRESS:**
- **STREET 1:** 1 CORPORATE WAY
- **CITY:** LANSING
- **STATE:** MI
- **ZIP:** 48951

## Series and Classes Contracts Data

### JNL/RAFI Multi-Factor U.S. Equity Fund (Series ID: S000064961)

| Class ID   | Class Name                                 | Ticker Symbol   |
|:---|:---|:---|
| C000210332 | JNL/RAFI Multi-Factor U.S. Equity Fund (I) |  |
| C000210333 | JNL/RAFI Multi-Factor U.S. Equity Fund (A) |  |

**Summary Prospectus – April 27, 2026**

**JNL/RAFI<sup>®</sup> Multi-Factor U.S. Equity 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 https://www.jackson.com/fund-literature.html. 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 <u>ProspectusRequest@jackson.com</u>. The current Prospectus and SAI, both dated April 27, 2026, as amended, are incorporated by reference into (which means they legally are a part of) this Summary Prospectus.

**Investment Objective.** The investment objective of the Fund is to track the performance of the RAFI<sup>®</sup> Multi-Factor US Index.

**Expenses.** This table describes the fees and expenses that you may pay if you buy, hold and sell 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.

You may pay other fees, such as brokerage commissions and other fees to financial intermediaries, which are not reflected in the tables and examples below.

**Shareholder Fees<br> (fees paid directly from your investment)**<br> Not Applicable

---

| | |
|:---|:---|
| **Annual Fund Operating Expenses <br> (Expenses that you pay each year as a percentage of the value of your investment)** | **Annual Fund Operating Expenses <br> (Expenses that you pay each year as a percentage of the value of your investment)** |
| | **Class A** |
| Management Fee | 0.17% |
| Distribution and/or Service (12b-1) Fees | 0.30% |
| Other Expenses<sup>1</sup> | 0.20% |
| Total Annual Fund Operating Expenses | 0.67% |

---

<sup>1</sup> "Other Expenses" include an Administrative Fee of 0.15% which is payable to Jackson National Asset Management, LLC ("JNAM" or "Adviser").

---

| | |
|:---|:---|
| **Annual Fund Operating Expenses <br> (Expenses that you pay each year as a percentage of the value of your investment)** | **Annual Fund Operating Expenses <br> (Expenses that you pay each year as a percentage of the value of your investment)** |
| | **Class I** |
| Management Fee | 0.17% |
| Distribution and/or Service (12b-1) Fees | 0.00% |
| Other Expenses<sup>1</sup> | 0.20% |
| Total Annual Fund Operating Expenses | 0.37% |

---

<sup>1</sup> "Other Expenses" include an Administrative Fee of 0.15% which is payable to Jackson National Asset Management, LLC ("JNAM" or "Adviser").

**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/RAFI® Multi-Factor U.S. Equity Fund Class A** | **JNL/RAFI® Multi-Factor U.S. Equity Fund Class A** | **JNL/RAFI® Multi-Factor U.S. Equity Fund Class A** | **JNL/RAFI® Multi-Factor U.S. Equity Fund Class A** |
| 1 year | 3 years | 5 years | 10 years |
| $68 | $214 | $373 | $835 |

---

---

| | | | |
|:---|:---|:---|:---|
| **JNL/RAFI® Multi-Factor U.S. Equity Fund Class I** | **JNL/RAFI® Multi-Factor U.S. Equity Fund Class I** | **JNL/RAFI® Multi-Factor U.S. Equity Fund Class I** | **JNL/RAFI® Multi-Factor U.S. Equity Fund Class I** |
| 1 year | 3 years | 5 years | 10 years |
| $38 | $119 | $208 | $468 |

---

**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** | |
| 1/1/2025 - 12/31/2025 | 40% |

---

**Principal Investment Strategies.** The Fund seeks to achieve its investment objective by investing under normal circumstances at least 80% of its assets (net assets plus the amount of any borrowings for investment purposes) in the component securities ("Component Securities") of the RAFI Multi-Factor US Index (the "Index"). The Fund may invest the remainder of its assets in cash, securities, and instruments that are not Component Securities but which Mellon Investments Corporation, the Fund's sub-adviser ("Sub-Adviser"), believes will help the Fund track its Index. The Index is designed to provide long-only exposure to multiple equity factors that seek to produce attractive long-term returns, and which may lower risk compared to less diversified strategies. The Fund attempts to replicate the Index by investing all or substantially all of its assets in the stocks that make up the Index. Indexing may offer a cost-effective investment approach to gaining diversified market exposure over the long-term.

The Index is constructed by RAFI Indices, LLC (the "Index Provider"). The Index Provider uses a rules-based approach to construct five factor portfolios within the Index. The Index equally weights each of the factor portfolios into a combined portfolio of stocks that are weighted by their fundamental size (e.g., earnings, revenues, book value).

The Index consists of five "factor portfolios," each of which emphasizes one of the following factors: value, low volatility, quality, momentum, and size.

The value factor emphasizes companies with high ratio of company fundamental weight to its market capitalization weight.

The low volatility factor emphasizes companies with low risk measure calculated as the variance of a company's daily excess return over five years explained by global, local country groups, and global industry excess returns.

The quality factor emphasizes companies that are high in profitability and low in investment spending.

The momentum factor emphasizes stocks with high momentum.

The size factor is the equal weight of the small company portions, based on a company's fundamental weight, of the other four factors. A company's fundamental weight may be adjusted by a "free float factor," which is the ratio of the total market capitalization of the shares of the company in free float to the total market capitalization of the company.

For the value, low volatility, and quality "factor portfolios," eligible securities are ranked by their factor score, and the top 25% of companies by fundamental weight are selected for inclusion within that "factor portfolio." For the momentum "factor portfolio," eligible securities are ranked by their momentum score and the top 50% of companies by fundamental weight are selected for inclusion.

The Index is reconstituted on an annual basis and rebalanced on a quarterly basis. As of December 31, 2025, the Index consisted of 837 Component Securities. The Index allocates an equal weight to each factor at each quarterly rebalance. Each factor (other than momentum) is reconstituted annually on the last business day of March and rebalanced on a quarterly staggered basis on the last business day of March, June, and September and the third Friday of December. This staggered rebalancing is intended to diversify risk and decrease market impact. The momentum factor, unlike the other factors, is reconstituted and fully rebalanced quarterly.

The Sub-Adviser uses a "passive" or "indexing" approach to try to achieve the Fund's investment objective. The Fund does not employ traditional methods of active investment management, which involves the buying and selling of securities based upon security analysis.

The Fund may invest in financial futures, a type of derivative that may be used to obtain exposure to a variety of underlying assets, to provide liquidity for cash flows, to hedge dividend accruals or for other purposes that facilitate meeting the Fund's objective. The Fund's use of financial futures is intended to assist replicating the investment performance of the Index.

The Fund may also invest in exchange-traded funds ("ETFs") to assist with index rebalances and to meet redemption or purchase requests. The Fund's holdings are rebalanced on a regular basis to reflect changes in the composition of the Index.

The Fund may invest, without limitation, in U.S. equity and equity-related securities, including common and preferred securities. In addition to futures, as described above, the Fund may also invest in other derivative instruments, such as options or swap agreements.

**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 Fund include:

· *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, including widespread disease and virus epidemics or pandemics, 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 or held by the Fund could decline if the financial condition of the companies the 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.

· *License termination risk* **–** The Fund may rely on licenses from a third party (licensor) that permit the Fund to
use that party's intellectual property in connection with the Fund's name and/or investment strategies. The license may be
terminated by the licensor, and as a result the Fund may lose its ability to use the licensed name or strategy, or receive important data
from the licensor. Accordingly, a license may have a significant effect on the future operation of the Fund, including the need to change
the investment strategy.

· *Passive investment risk* – The Fund is not actively managed. Unlike with an actively managed fund, the Fund does not use
techniques or defensive strategies designed to lessen the effects of market volatility or to reduce the impact of periods of market decline.
This means that, based on market and economic conditions, the Fund's performance could be lower than actively managed funds that
realign their portfolios more frequently based on the real-time market trends.

· *Index investing risk –* The Fund's indexing strategy does not attempt to manage volatility, use defensive strategies,
or reduce the effects of any long-term periods of poor stock performance. Should the Fund engage in index sampling, the performance of
the securities selected will not provide investment performance tracking that of the Index. Fund performance may not exactly correspond
with the performance of the relevant index for a number of reasons, including, but not limited to: the timing of purchases and redemptions
of the Fund's shares, changes in the composition of the index, and the Fund's expenses. Certain regulatory limitations, such
as fund diversification requirements, may limit the ability of the Fund to completely replicate an index.

· *Tracking error risk* – Tracking error is the divergence of the Fund's performance from that of the Index. The Fund's
return may not track the return of the Index for a number of reasons. Tracking error may occur because of differences between the securities
and other instruments held in the Fund's portfolio and those included in the Index, pricing differences, differences in transaction
costs, the Fund's holding of uninvested cash, differences in timing of the accrual of or the valuation of dividends or interest,
tax gains or losses, changes to the Index or the costs to the Fund of complying with various new or existing regulatory requirements.
This risk may be heightened during times of increased market volatility or other unusual market conditions. Tracking error also may result
because the Fund incurs fees and expenses, while the Index does not. However, the Fund may be required to deviate its investments from
the securities and relative weightings of the Index to comply with the 1940 Act, as amended to meet the issuer diversiﬁcation requirements
of the Internal Revenue Code of 1986, as amended, applicable to regulated investment companies, or as a result of local market restrictions,
or other legal reasons, including regulatory limits or other restrictions on securities that may be purchased by the Investment Adviser
and its afﬁliates.

· *Limited management, trading cost and rebalance risk* **–** Investing primarily according to specific, mechanical criteria
applied on a specific date each year may prevent a Fund from responding to market fluctuations or changes in the financial condition or
business prospects of the selected companies during the year.

· *Small-capitalization investing risk* **–** Investing in smaller companies, some of which may be newer companies or
start-ups, generally involves greater risks than investing in larger, more established ones. The securities of companies with smaller
market capitalizations often are less widely held and trade less frequently and in lesser quantities, and their market prices often fluctuate
more, than the securities of companies with larger market capitalizations.

· *Derivatives risk* **–** Investments in derivatives, which are financial instruments whose value depends on, or is derived
from, the value of underlying assets, reference rates, or indices, can be highly volatile and may be subject to transaction costs and
certain risks, such as unanticipated changes in securities prices and global currency investment. Derivatives also are subject to leverage
risk, liquidity risk, interest rate risk, market risk, counterparty risk, and credit risk. They also involve the risk of mispricing or
improper valuation and the risk that changes in the value of the derivative may not correlate perfectly with the underlying asset, interest
rate or index. Gains or losses from derivatives can be substantially greater than the derivatives' original cost.

· *Exchange-traded funds investing risk –* An investment in an ETF generally presents the following risks: (i) the same primary
risks as an investment in a conventional fund (i.e., one that is not exchange-traded) that has the same investment objectives, strategies
and policies; (ii) the risk that an ETF may fail to accurately track the market segment or index that underlies its investment objective;
(iii) price fluctuation, resulting in a loss to the Fund; (iv) the risk that an ETF may trade at a discount to its net asset value; (v)
the risk that an active market for an ETF's shares may not develop or be maintained; and (vi) the risk that an ETF may no longer
meet the listing requirements of any applicable exchanges on which that ETF is listed. When the Fund invests in an ETF, shareholders of
the Fund bear their proportionate share of the ETF's fees and expenses as well as their share of the Fund's fees and expenses.

· *Securities lending risk* – Securities lending involves the risk of loss or delays in recovery of the loaned securities
or loss of rights in the collateral if the borrower fails to return the security loaned or becomes insolvent.

<br> **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 a broad-based securities market index and an additional index that the Adviser believes more closely reflects the market segments in which the Fund invests. 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.

Performance shown below reflects the historical performance of the JNL/Mellon Capital JNL 5 Fund, then a series of JNL Variable Fund LLC, for periods before the Fund's registration statement became effective on June 24, 2019.

**Annual Total Returns as of December 31**

**Class A**

![PerformanceBarChartData(2016:12.18, 2017:16.93, 2018:-9.73, 2019:19.54, 2020:9.95, 2021:26.39, 2022:-8.02, 2023:12.06, 2024:18.64, 2025:16.21)](image_001.jpg)

**Best Quarter (ended 6/30/2020):** 18.64%; **Worst Quarter (ended 3/31/2020):** -24.81%

**Annual Total Returns as of December 31**

**Class I**

![PerformanceBarChartData(2016:12.4, 2017:17.24, 2018:-9.46, 2019:19.76, 2020:10.28, 2021:26.76, 2022:-7.75, 2023:12.42, 2024:19.05, 2025:16.53)](image_002.jpg)

**Best Quarter (ended 6/30/2020):** 18.68%; **Worst Quarter (ended 3/31/2020):** -24.76%

---

| | | | |
|:---|:---|:---|:---|
| **Average Annual Total Returns as of 12/31/2025** | | | |
| | **1 year** | **5 year** | **10 year** |
| JNL/RAFI® Multi-Factor U.S. Equity Fund (Class A) | 16.21% | 12.43% | 10.83% |
| Morningstar US Market Extended Index (reflects no deduction for fees, expenses, or taxes) | 17.21% | 13.13% | 14.31% |
| RAFI Multi-Factor US Index (reflects no deduction for fees, expenses, or taxes) | 16.95% | 13.16% | 12.61% |

---

---

| | | | |
|:---|:---|:---|:---|
| **Average Annual Total Returns as of 12/31/2025** | | | |
| | **1 year** | **5 year** | **10 year** |
| JNL/RAFI® Multi-Factor U.S. Equity Fund (Class I) | 16.53% | 12.77% | 11.13% |
| Morningstar US Market Extended Index (reflects no deduction for fees, expenses, or taxes) | 17.21% | 13.13% | 14.31% |
| RAFI Multi-Factor US Index (reflects no deduction for fees, expenses, or taxes) | 16.95% | 13.16% | 12.61% |

---

**Portfolio Management.**

**Investment Adviser to the Fund:**<br> Jackson National Asset Management, LLC ("JNAM")

**Sub-Adviser:** <br> Mellon Investments Corporation ("Mellon")

**Portfolio Managers:**

---

| | | |
|:---|:---|:---|
| **Name:** | **Joined Fund Management Team In:** | **Title:** |
| Marlene Walker Smith | October 2020 | Senior Director and Chief Investment Officer, Mellon |
| David France, CFA | October 2020 | Senior Vice President and Senior Portfolio Manager, Mellon |
| Todd Frysinger, CFA | October 2020 | Senior Vice President and Senior Portfolio Manager, Mellon |
| Vlasta Sheremeta, CFA | October 2020 | Senior Vice President and Senior Portfolio Manager, Mellon |
| Michael Stoll | October 2020 | Senior Vice President and Senior Portfolio Manager, Mellon |

---

**Purchase and Redemption of Fund Shares** 

Only separate accounts of Jackson National Life Insurance Company ("Jackson National") or Jackson National Life Insurance Company of New York ("Jackson National 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 National or Jackson National 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 National or Jackson National 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.