6-K

UNITEDSTATES

SECURITIESAND EXCHANGE COMMISSION

Washington,D.C. 20549

FORM6-K

REPORTOF FOREIGN PRIVATE ISSUER

PURSUANTTO RULE 13a-16 OR 15d-16

UNDERTHE SECURITIES EXCHANGE ACT OF 1934

Forthe month of September 2025

CommissionFile Number: 001-36896

MercurityFintech Holding Inc.

(Registrant’s name)

1330Avenue of the Americas, Fl 33,

NewYork, NY 10019

(Address of principal executive office)

Indicate by check mark whether the registrant files or will file annual reports under cover of Form 20-F or Form 40-F:

Form 20-F ☒ Form 40-F ☐

On September 29, 2025, the Company issued a press release announcing its inclusion in the S&P Global Broad Market Index (BMI). A copy of the press release is attached herein as Exhibit 99.1.

This report on Form 6-K (including the exhibits hereto) shall not be deemed to be “filed” for purposes of the Securities Exchange Act of 1934, as amended (the “Exchange Act”) and shall not be incorporated by reference into any filing under the Securities Act of 1933, as amended, except as shall be expressly set forth by specific reference in such filing.

Forward-LookingStatements

This Form 6-K includes “forward-looking statements” within the meaning of the “safe harbor” provisions of the Private Securities Litigation Reform Act of 1995. The Company’s actual results may differ from its expectations, estimates and projections and consequently, you should not rely on these forward-looking statements as predictions of future events. Words such as “expect,” “estimate,” “project,” “budget,” “forecast,” “anticipate,” “intend,” “plan,” “may,” “will,” “could,” “should,” “believe,” “hope,” “predict,” “potential,” “continue,” and similar expressions are intended to identify such forward-looking statements. These forward-looking statements include the Company’s expectations with respect to future performance and involve significant risks and uncertainties that could cause the actual results to differ materially from the expected results. Most of these factors are outside the Company’s control and are difficult to predict. Factors that may cause such differences include but are not limited to risks and uncertainties incorporated by reference under “Risk Factors” in the Company’s Form 20-F (SEC File No. 001-36896) filed with the SEC on April 30, 2025 and in the Company’s other filings with the SEC. The Company cautions that the foregoing list of factors is not exclusive. The Company cautions readers not to place undue reliance upon any forward-looking statements, which speak only as of the date made. The Company does not undertake or accept any obligation or undertaking to release publicly any updates or revisions to any forward-looking statements to reflect any change in its expectations or any change in events, conditions, or circumstances on which any such statement is based.

EXHIBITINDEX

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized.

Exhibit 99.1

MercurityFintech Holding Inc. Added to the S&P Global Broad Market Index (BMI)

Index inclusion reflects MFH’s growing market presence and enhances accessibility for global institutional investors

NEW YORK, NY, Sept. 29, 2025 (GLOBE NEWSWIRE) — Mercurity Fintech Holding Inc. (the “Company,” “we,” “us,” “Mercurity Fintech,” or “MFH”) (Nasdaq: MFH), a blockchain-powered fintech group and member of the Russell 2000 Index, today announced its inclusion in the S&P Global Broad Market Index (BMI), effective as of Monday, September 22, 2025. This milestone inclusion also makes the Company eligible for consideration in additional S&P indices that draw from the Global BMI universe.

The S&P Global BMI is designed to capture the global, investable equity universe, spanning 48 developed and emerging market countries and representing over 99% of available market capitalization worldwide. With more than 14,000 companies included, the BMI provides the foundation for institutional investors, ETFs, and strategy indices.

“We are honored that, following our inclusion in the Russell 2000^®^ Index , Mercurity Fintech has now also been successfully added to the S&P Global BMI, another significant milestone for Mercurity Fintech as we continue to innovate at the intersection of blockchain technology and traditional finance,” said Shi Qiu, Chief Executive Officer of Mercurity Fintech Holding Inc. “This recognition reflects our strategic approach to bridging digital assets and capital markets and helps position us for growth as investors increasingly seek exposure to next-generation fintech companies.”

Inclusion in the S&P Global BMI may increase investor interest, enhance liquidity, and broaden market recognition as index-tracking funds and institutional portfolios gain exposure to MFH through passive investment strategies. As of September 2025, around 80 institutional investors, including major index funds and ETFs, are shareholders of MFH, underscoring the Company’s growing visibility among institutional investors.

AboutMercurity Fintech Holding Inc.

Mercurity Fintech Holding Inc. (Nasdaq: MFH) is a fintech group powered by blockchain infrastructure, offering technology and financial services. Through its subsidiaries, including Chaince Securities, LLC, MFH aims to bridge traditional finance and digital innovation, offering services spanning digital assets, financial advisory, and capital markets solutions.

Forward-LookingStatements

This announcement contains forward-looking statements within the meaning of the safe harbor provisions of the Private Securities Litigation Reform Act of 1995. All statements other than statements of historical fact in this announcement are forward-looking statements. These forward-looking statements involve known and unknown risks and uncertainties and are based on current expectations and projections about future events and financial trends that the Company believes may affect its financial condition, results of operations, business strategy and financial needs. Investors can identify these forward-looking statements by words or phrases such as “may,” “will,” “expect,” “anticipate,” “aim,” “estimate,” “intend,” “plan,” “believe,” “potential,” “continue,” “is/are likely to” or other similar expressions. The Company undertakes no obligation to update forward-looking statements to reflect subsequent occurring events or circumstances, or changes in its expectations, except as may be required by law. Although the Company believes that the expectations expressed in these forward-looking statements are reasonable, it cannot assure you that such expectations will turn out to be correct, and the Company cautions investors that actual results may differ materially from the anticipated results.

Contacts:

International Elite Capital Inc.

Annabelle Zhang

Tel: +1(646) 866-7928

Email: mfhfintech@iecapitalusa.com