[424B3] John Hancock Financial Opportunities Fund Prospectus Filed Pursuant to Rule 424(b)(3)

Rhea-AI Filing Summary

Effective June 30, 2025, the Statement of Additional Information (SAI) for John Hancock Financial Opportunities Fund (ticker BTO), John Hancock Investors Trust and John Hancock Premium Dividend Fund is updated to reflect two governance changes:

• Paul Lorentz has resigned as a non-independent Trustee of each fund.
• Kristie M. Feinberg, already serving as each fund’s President and CEO of John Hancock Investment Management, has been appointed as a non-independent Trustee effective the same date and will stand for shareholder election in 2026.

The SAI now lists Ms. Feinberg’s extensive leadership background, including her roles at Manulife Investment Management, Invesco and Oppenheimer Funds, underscoring her experience in finance, strategy and product distribution. The board-class assignment for the Financial Opportunities Fund and Premium Dividend Fund places her term expiring in 2026. The John Hancock Fund Complex comprises 186 funds as of April 30, 2025.

No portfolio, financial or strategic policy changes are disclosed; the supplement is solely a board-composition update, to be read in conjunction with the current SAI.

Insights

Corporate Governance Expert

TL;DR: Routine trustee rotation; governance impact minimal, investment thesis unchanged.

The filing records a normal board transition: Paul Lorentz exits, Kristie Feinberg joins as non-independent Trustee while retaining her President role. Her deep asset-management résumé adds relevant expertise, but because she is already the funds’ CEO, her new board seat merely formalizes influence she effectively possessed. No disclosure suggests strategic, fee, or policy adjustments. Closed-end fund investors should view the change as administrative; it neither alters distribution policy nor portfolio management. Oversight independence remains intact, as the majority of Trustees are still independent, so regulatory risk is low.

Statement of Additional Information Supplement

John Hancock Financial Opportunities Fund
John Hancock Investors Trust
John Hancock Premium Dividend Fund

Supplement dated June 30, 2025 to the current Statement of Additional Information, as may be supplemented (the SAI)

Effective June 30, 2025, Paul Lorentz no longer serves as a non-independent Trustee of the investment companies listed above (each a “Trust”). Accordingly, all references to Mr. Lorentz as a current non-independent Trustee are removed from the SAI.

In addition, the Board of Trustees of each Trust has appointed Kristie Feinberg, who will continue to serve as each Trust’s President, as a non-independent Trustee effective June 30, 2025. Ms. Feinberg will stand for election in 2026. For John Hancock Financial Opportunities Fund and John Hancock Premium Dividend Income Fund, Ms. Feinberg is a member of a class of Trustees whose term will expire in 2026. As of April 30, 2025, the “John Hancock Fund Complex” consisted of 186 funds (including separate series of series mutual funds). Ms. Feinberg’s Principal Occupation(s) and Other Directorships are as follows:

Head of Retail, Manulife Investment Management (since 2025); Head of Wealth & Asset Management, U.S. and Europe, for John Hancock and Manulife (2023–2025); Director and Chairman, John Hancock Investment Management LLC (since 2023); Director and Chairman, John Hancock Variable Trust Advisers LLC (since 2023); Director and Chairman, John Hancock Investment Management Distributors LLC (since 2023); CFO and Global Head of Strategy, Manulife Investment Management (2021–2023, including prior positions); CFO Americas & Global Head of Treasury, Invesco, Ltd., Invesco US (2019–2020, including prior positions); Senior Vice President, Corporate Treasurer and Business Controller, Oppenheimer Funds (2001–2019, including prior positions); President (Chief Executive Officer and Principal Executive Officer) of various trusts within the John Hancock Fund Complex (since 2023, including prior positions).

Trustee of various trusts within the John Hancock Fund Complex (since 2025).

The section under the heading “Additional Information about the Trustees” is amended to include the following:

Kristie M. Feinberg — As President and CEO of John Hancock Investment Management and of various trusts within the John Hancock Fund Complex, and through prior leadership roles at Manulife Investment Management including Head of Wealth & Asset Management, U.S. and Europe and CFO and Global Head of Strategy, Ms. Feinberg brings deep expertise in financial services. Her strong background in finance, strategy, and leadership, along with a proven track record of expanding product offerings and distribution, enables her to provide strategic insight and management input to the Board.

You should read this supplement in conjunction with the SAI and retain it for your future reference.

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FAQ

Why did John Hancock file this 424B3 supplement for BTO?

To disclose the resignation of Trustee Paul Lorentz and the appointment of Kristie M. Feinberg as a non-independent Trustee effective June 30, 2025.

Who is the new Trustee for John Hancock Financial Opportunities Fund (BTO)?

Kristie M. Feinberg, the funds’ current President and CEO of John Hancock Investment Management, became a non-independent Trustee on June 30, 2025.

When will Kristie Feinberg stand for election by shareholders?

Ms. Feinberg is slated for shareholder election in 2026; her board class term expires the same year.

Does the supplement indicate any changes to fund strategy or distributions?

No. The document only updates board composition; it does not announce changes to investment strategy, fees, or distribution policies.

How many funds are in the John Hancock Fund Complex as of April 30, 2025?

The complex consists of 186 funds, including separate series of series mutual funds.