Summary Prospectus by Investment Company (Form 497K)

John Hancock Variable Insurance Trust

Summary prospectus

American Global Growth Trust

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 and most recent reports, online at dfinview.com/johnhancock?site=funds. You can also get this information at no cost by sending an email request to [email protected] or calling 800-344-1029 (for John Hancock Variable Annuities) or 800-732-5543 (for John Hancock Variable Life Insurance), or if your policy is held through another insurance company, please contact that company. The fund's prospectus and Statement of Additional Information, both dated April 27, 2026, as may be supplemented, and most recent financial highlights information included in the shareholder report, dated December 31, 2025, are incorporated by reference into this summary prospectus. This summary prospectus is intended for use in connection with a variable contract as defined in Section 817(d) of the Internal Revenue Code and is not intended for use by other investors. 

Tickers
Series I: JAJQX	Series II: JAHWX	Series III: JAHVX

Investment objective

To seek to provide long-term growth of capital.

Fees and expenses

This table describes the fees and expenses that you may pay if you buy, hold, and sell shares of the fund. The fees and expenses do not reflect fees and expenses of any variable insurance or variable annuities contract that may use the fund as its underlying investment option and would be higher if they did. 

Annual fund operating expenses (%) (expenses that you pay each year as a percentage of the value of your investment)	Series I	Series II	Series III
Management fee	0.47 1	0.47 1	0.47 1
Distribution and service (Rule 12b-1) fees	0.60	0.75	0.25
Other expenses	0.12 1	0.12 1	0.12 1
Total annual fund operating expenses	1.19 1	1.34 1	0.84 1
Contractual expense reimbursement	-0.12 2,3	-0.12 2,3	-0.12 2,3
Total annual fund operating expenses after expense reimbursements	1.07 1	1.22 1	0.72 1

Expense example

The examples are intended to help you compare the cost of investing in the fund with the cost of investing in other mutual funds. The examples assume that $10,000 is invested in the fund for the periods indicated and then all shares are redeemed at the end of those periods. The examples also assume that the investment has a 5% return each year and that the fund's operating expenses remain the same. The expense example does not reflect fees and expenses of any variable insurance contract that may use the fund as its underlying investment option and would be higher if they did. Although your actual costs may be higher or lower, based on these assumptions your costs would be: 

Expenses ($)	Series I	Series II	Series III
1 year	109	124	74
3 years	366	413	256
5 years	643	723	454
10 years	1,433	1,602	1,026

Portfolio turnover

The fund, which operates as a feeder fund, does not pay transaction costs, such as commissions, when it buys and sells shares of the master fund (or "turns over" its portfolio). A master fund does pay transaction costs when it turns over its portfolio, and 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 performance of the master fund and of the fund. During its most recent fiscal year, the master fund's portfolio turnover rate was 45% of the average value of its portfolio.

Principal investment strategies

The fund invests all of its assets in Class 1 shares of its master fund, the Global Growth Fund, a series of American Funds Insurance Series. The Global Growth Fund invests primarily in common stocks of companies  around the world that the advisor believes have potential for growth. As a fund that seeks to invest globally, the Global Growth Fund will allocate its assets among securities of companies in various countries, including the United States and countries with emerging markets (but in no fewer than three countries). Under normal market conditions, the fund will invest a percentage of its net assets outside the United States. That percentage will represent at least (a) 40% of the fund's net assets, unless market conditions are not deemed favorable by the fund's investment adviser, in which case 30%, or (b) the percentage of the MSCI All Country World Index represented by companies outside the United States minus 5%, whichever is lower.

Use of Hedging and Other Strategic Transactions. The fund is authorized to use all of the various investment strategies referred to under "Additional Information About the Funds' Principal Risks - Hedging, derivatives and other strategic transactions risk."

The master fund may invest in other funds managed by the investment advisor or its affiliates to more effectively invest in a diversified set of securities in a specific asset class such as money market instruments, bonds and other securities ("Central Funds"). Shares of Central Funds are only offered for purchase to the master fund's investment advisor and its affiliates and other funds, investment vehicles and accounts managed by the master fund's investment advisor and its affiliates. When investing in Central Funds, the master fund bears its proportionate share of the expenses of the Central Funds in which it invests but does not bear additional management fees through its investment in such Central Funds. The investment results of the portion of the master fund's assets invested in the Central Funds will be based upon the investment results of the Central Funds.

The manager considers environmental, social, and/or governance (ESG) factors, alongside other relevant factors, as part of its investment process. ESG factors may include, but are not limited to, matters regarding board diversity, climate change policies, and supply chain and human rights policies. The ESG characteristics utilized in the fund's investment process may change over time and one or more characteristics may not be relevant with respect to all issuers that are eligible fund investments. Because ESG factors are considered alongside other relevant factors, the manager may determine that an investment is appropriate notwithstanding its relative ESG characteristics.

Principal risks

An investment in the fund is not a bank deposit and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency. Many factors affect performance, and fund shares will fluctuate in price, meaning you could lose money. The fund's investment strategy may not produce the intended results.

The fund's main risks are listed below in alphabetical order, not in order of importance. Before investing, be sure to read the additional descriptions of these risks beginning on page 257 of the prospectus.

Credit and counterparty risk. The counterparty to an over-the-counter derivatives contract or a borrower of fund securities may not make timely payments or otherwise honor its obligations.

Economic and market events risk. Events in the U.S. and global financial markets, including actions taken by the U.S. Federal Reserve or foreign central banks to stimulate or stabilize economic growth, may at times result in unusually high market volatility, which could negatively impact performance. Reduced liquidity in credit and fixed-income markets could adversely affect issuers worldwide. Banks and financial services companies could suffer losses if interest rates rise or economic conditions deteriorate.

Equity securities risk. The price of equity securities may decline due to changes in a company's financial condition or overall market conditions. Growth company securities may fluctuate more in price than other securities because of the greater emphasis on earnings expectations.

ESG integration risk. The manager considers ESG factors that it deems relevant or additive, along with other material factors and analysis, when managing the fund. ESG factors may include, but are not limited to, matters regarding board diversity, climate change policies, and supply chain and human rights policies. The manager may consider these ESG factors on all or a meaningful portion of the fund's investments. Integration of ESG factors into the fund's investment process does not preclude the fund from including companies with low ESG characteristics or excluding companies with high

ESG characteristics in the fund's investments. Incorporating ESG criteria and making investment decisions based on certain ESG characteristics, as determined by the manager, carries the risk that the fund may perform differently, including underperforming, funds that do not utilize ESG criteria, or funds that utilize different ESG criteria.

Foreign securities risk. Less information may be publicly available regarding foreign issuers, including foreign government issuers. Foreign securities may be subject to foreign taxes and may be more volatile than U.S. securities. Currency fluctuations and political and economic developments may adversely impact the value of foreign securities. The risks of investing in foreign securities are magnified in emerging markets.

Hedging, derivatives, and other strategic transactions risk. Hedging, derivatives, and other strategic transactions may increase a fund's volatility and could produce disproportionate losses, potentially more than the fund's principal investment. Risks of these transactions are different from and possibly greater than risks of investing directly in securities and other traditional instruments. Under certain market conditions, derivatives could become harder to value or sell and may become subject to liquidity risk (i.e., the inability to enter into closing transactions). Derivatives and other strategic transactions that the fund intends to utilize include: credit default swaps, foreign currency forward contracts, foreign currency swaps, futures contracts, options on futures, swaptions, interest-rate swaps, options, swaps, equity-linked notes (equity-linked notes generally reflect the risks associated with their underlying securities, depend on the credit of the note's issuer, may be privately placed, and may have a limited secondary market), inverse floating-rate securities, reverse repurchase agreements, and total return swaps. Foreign currency forward contracts, futures contracts, options, and swaps generally are subject to counterparty risk. In addition, swaps may be subject to interest-rate and settlement risk, and the risk of default of the underlying reference obligation. Derivatives associated with foreign currency transactions are subject to currency risk. An event of default or insolvency of the counterparty to a reverse repurchase agreement could result in delays or restrictions with respect to the fund's ability to dispose of the underlying securities. In addition, a reverse repurchase agreement may be considered a form of leverage and may, therefore, increase fluctuations in the fund's net asset value (NAV) per share.

Information technology companies risk. Information technology companies can be significantly affected by rapid obsolescence, short product cycles, competition from new market entrants, and heightened cybersecurity risk, among other factors.

Investment company securities risk. Fund shareholders indirectly bear their proportionate share of the expenses of any investment company in which the fund invests. The total return on such investments will be reduced by the operating expenses and fees of such other investment companies, including advisory fees.

Large company risk. Larger companies may grow more slowly than smaller companies or be slower to respond to business developments. Large-capitalization securities may underperform the market as a whole.

Liquidity risk. The extent (if at all) to which a security may be sold or a derivative position closed without negatively impacting its market value may be impaired by reduced market activity or participation, legal restrictions, or other economic and market impediments.

Operational and cybersecurity risk. Cybersecurity breaches may allow an unauthorized party to gain access to fund assets, customer data, or proprietary information, or cause a fund or its service providers to suffer data corruption or lose operational functionality. Similar incidents affecting issuers of a fund's securities may negatively impact performance. Operational risk may arise from human error, error by third parties, communication errors, or technology failures, among other causes.

Sector risk. When a fund focuses its investments in certain sectors of the economy, its performance may be driven largely by sector performance and could fluctuate more widely than if the fund were invested more evenly across sectors.

Small and mid-sized company risk. Small and mid-sized companies are generally less established and may be more volatile than larger companies. Small and/or mid-capitalization securities may underperform the market as a whole.

Past performance

The following information illustrates the variability of the fund's returns and 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 a broad-based securities market index. Past performance does not indicate future results. All figures assume dividend reinvestment. The performance information below does not reflect fees and expenses of any variable insurance contract which may use JHVIT as its underlying investment option. If such fees and expenses had been reflected, performance would be lower.

Calendar year total returns (%)-Series II   

Best quarter:	Q2 2020	24.15%
Worst quarter:	Q2 2022	-16.69%

 

Average annual total returns (%)-as of 12/31/2025	1 year	5 year	10 year
Series I	21.17	7.81	11.74
Series II	21.08	7.74	11.65
Series III	21.55	8.18	12.12
MSCI ACWI (reflects no deduction for fees, expenses, or taxes, except foreign withholding taxes on dividends)	22.34	11.19	11.72

Investment management

Investment advisor of the master fund Capital Research and Management Company

Portfolio management

The following individuals are jointly and primarily responsible for the day-to-day management of the master fund's portfolio. 

Mathews Cherian	Patrice Collette	Matt Hochstetler
Partner - Capital World Investors Managed fund since 2026	Partner - Capital World Investors Managed fund since 2015	Partner - Capital World Investors Managed fund since 2023
Barbara Burtin Partner - Capital World Investors Managed fund since 2025	Jason B. Smith Partner - Capital World Investors Managed fund since 2025

Purchase and redemption of fund shares

Shares of the fund are not sold directly to the public but generally may be sold only to insurance companies and their separate accounts as the underlying investment options for variable annuity and variable life insurance contracts issued by such companies, to certain entities affiliated with the insurance companies, to those funds of JHVIT that operate as funds of funds and invest in other funds and to certain qualified retirement plans (qualified plans).

Shares of the fund are offered continuously, without sales charge, and are sold and redeemed each business day (which typically is any day the New York Stock Exchange is open) at a price equal to their net asset value (NAV) determined for that business day as set forth under "Valuation of shares" in this prospectus. The Portfolio does not have minimum initial or subsequent investment requirements. Payment for shares redeemed will generally be made within seven days after receipt of a proper notice of redemption.

Taxes

Because shares of the fund may be purchased only through variable insurance contracts and qualified plans, it is expected that any dividends or capital gains distributions made by the fund will be exempt from current federal taxation if left to accumulate within the variable contract or qualified plan. Holders of variable insurance contracts should consult the prospectuses of their respective contracts for information on the federal income tax consequences to such holders.

Compensation of financial intermediaries

The fund is not sold directly to the general public but instead is offered as an underlying investment option for variable insurance contracts. The distributors of these contracts, the insurance companies that issue the contracts and their related companies (Related Parties), may pay compensation to broker-dealers and other intermediaries for distribution and other services and may enter into revenue sharing arrangements with certain intermediaries. The fund pays fees to the Related Parties for management, distribution and other services. Payments by insurance and related companies to intermediaries may create a conflict of interest by influencing them and their salespersons to recommend such contracts over other investments. Ask your salesperson or visit your financial intermediary's website for more information. In addition, payments by the funds to Related Parties may be a factor that an insurance company considers in including the funds as underlying investment options in variable insurance contracts. The prospectus (or other offering document) for your variable insurance contract may contain additional information about these payments.