UNITED STATES

SECURITIES AND EXCHANGECOMMISSION

WASHINGTON, D.C. 20549

FORM 6-K

REPORT OF FOREIGN PRIVATE ISSUER

PURSUANT TO RULE 13a-16 OR 15d-16 UNDER

THE SECURITIES EXCHANGE ACT OF 1934

For the month of August 2025

Commission File Number: 001-38820

Futu Holdings Limited

34/F, United Centre

95 Queensway, Admiralty

Hong Kong S.A.R., People’s Republic ofChina

+852 2523-3588

(Address of principal executive offices)

Indicate by check mark whether the registrant files or will file annualreports under cover of Form 20-F or Form 40-F.

Form 20-F  x                          Form 40-F  ¨

Exhibit Index

SIGNATURE

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

Date: August 20, 2025

Exhibit 99.1

Futu Announces Second Quarter 2025 UnauditedFinancial Results

HONG KONG, August 20, 2025 (GLOBE NEWSWIRE) -- FutuHoldings Limited (“Futu” or the “Company”) (Nasdaq: FUTU), a leading tech-driven online brokerage and wealthmanagement platform, today announced its unaudited financial results for the second quarter ended June 30, 2025.

Second Quarter 2025 Operational Highlights

Second Quarter 2025 Financial Highlights

Mr. LeafHua Li, Futu’s Chairman and Chief Executive Officer, said, “We concluded the second quarter with approximately 2.9 millionfunded accounts, up 40.9% year-over-year and 7.6% quarter-over-quarter. We reached a key milestone in our internationalexpansion – as of quarter end, over half of our total funded accounts are from clients outside of Futu Securities Hong Kong.”

“Duringthe quarter, we added over 204 thousand new funded accounts, growing 31.6% year-over-year. Trade policy-induced market volatility, coupledwith a slate of high-profile IPOs, boosted retail sentiment in Hong Kong, which, for the third quarter in a row, contributed the highestnumber of new funded accounts across all markets. The U.S. market also recorded solid growth. In the second quarter, we became the officialsponsor of the New York Mets, further elevating our brand image in the U.S. and beyond. We also launched crypto trading in most of thestates in June, strengthening our value proposition as a one-stop trading platform. In Malaysia, we continued to enrich localized featuressuch as Malaysian IPO financing services and Malaysian Stock Earnings Calendar. In Japan, we partnered with Nasdaq and the Japan ExchangeGroup to host our inaugural offline investment event, MooFest Japan, which attracted over 12 thousand Tokyo investors to signup, significantly raising our brand recognition among local retail investors. During the second quarter, our funded account quarterlyretention rate again stayed well above 98%, a testament to strong client loyalty.”

¹ The number of funded accounts refersto the number of brokerage accounts with Futu that have a positive account balance. Multiple funded accounts by one client are countedas one funded account.

² Multiple brokerage accounts by oneclient are counted as one brokerage account.

³ The number of users refers to the number of user accountsregistered with Futu.

⁴ Non-GAAP adjusted net income isdefined as net income excluding share-based compensation expenses.

“Bolsteredby robust net asset inflow and favorable mark-to-market gains from Hong Kong and U.S. equities, total client assets climbed to a new highof HK$973.9 billion, up 68.1% year-over-year and 17.4% quarter-over-quarter. Notably, net asset inflow during the first half of 2025 almostdoubled year-over-year. This robust asset inflow was broad-based as average client assets across all markets saw sequential increase.Margin financing and securities lending balance ended the quarter flat at HK$51.4 billion, as clients unwound leveraged positions duringmarket plunge in April but risk appetite recovered subsequently.”

“Totaltrading volume reached HK$3.59 trillion in the second quarter, up 121.2% year-over-year and 11.6% quarter-over-quarter. The market turmoilin April and the surge of crypto names following favorable policy developments sparked trading interests. U.S. stock trading volumegrew 19.7% sequentially to HK$2.70 trillion, led by EV and crypto names. Hong Kong stock trading volume declined 9.0% quarter-over-quarterto HK$833.5 billion, mainly due to softer trading activities in technology names, partly lifted by higher turnover in new consumptionstocks.”

“Totalclient assets in wealth management reached HK$163.2 billion as of quarter end, up 104.4% year-over-year and 17.2% quarter-over-quarter.In Hong Kong and Singapore, we added HKD- and RMB-denominated bonds as well as floating-rate bonds to diversify our fixed income offerings.In Hong Kong, we launched principal-protected structured products, and thus became the first online broker to offer structured productsto retail investors. We also became the first and only online brokerage platform to distribute ChinaAMC (HK)'s tokenized moneymarket funds.”

“Asof quarter end, we served 517 IPO distribution and IR clients, up 14.6% year-over-year. During the quarter, we acted as joint bookrunnersfor several prominent Hong Kong IPOs. In the Haitian Flavouring and Food IPO, we attracted a record 102 thousand subscribers andranked first among all brokers in both subscriber count and total subscription amount. In the first half of 2025, we partnered with sixof the ten largest Hong Kong IPOs by fundraising size and facilitated over HK$10 billion in subscription amount for 12 IPOs each.”

Second Quarter 2025 Financial Results

Revenues

Total revenues were HK$5,310.9 million (US$676.6million), an increase of 69.7% from HK$3,129.0 million in the second quarter of 2024.

Brokerage commission and handling charge incomewas HK$2,578.6 million (US$328.5 million), an increase of 87.4% from the second quarter of 2024. This was mainly due to higher tradingvolume, although blended commission rate was softer compared to the year-ago quarter.

Interest income was HK$2,288.2 million (US$291.5million), an increase of 43.8% from the second quarter of 2024. The increase was mainly driven by higher interest income from securitiesborrowing and lending business, bank deposits and margin financing.

Other income was HK$444.1 million (US$56.6 million),an increase of 175.8% from the second quarter of 2024. The increase was primarily attributable to higher fund distribution service incomeand currency exchange income.

Costs

Total costs were HK$670.9 million (US$85.5 million),an increase of 16.8% from HK$574.3 million in the second quarter of 2024.

Brokerage commission and handling charge expenseswere HK$160.6 million (US$20.5 million), an increase of 84.2% from the second quarter of 2024. This increase was roughly in line withthe growth of our brokerage commission and handling charge income.

Interest expenses were HK$377.6 million (US$48.1million), flat compared to the second quarter of 2024, as higher expenses associated with our securities borrowing and lending businesswere offset by lower margin financing interest expenses.

Processing and servicing costs were HK$132.7 million(US$16.9 million), an increase of 21.3% from the second quarter of 2024. The increase was primarily due to higher data transmission feeas well as higher market information and data fee.

Gross Profit

Total gross profit was HK$4,639.9 million (US$591.1million), an increase of 81.6% from HK$2,554.7 million in the second quarter of 2024. Gross margin was 87.4%, as compared to 81.6% inthe second quarter of 2024.

Operating Expenses

Total operating expenses were HK$1,296.0 million(US$165.1 million), an increase of 20.6% from HK$1,074.4 million in the second quarter of 2024.

Research and development expenses were HK$441.9million (US$56.3 million), an increase of 18.2% from the second quarter of 2024. This increase was primarily driven by greater investmentin AI capabilities.

Selling and marketing expenses were HK$429.1 million(US$54.7 million), an increase of 26.8% from HK$338.3 million in the second quarter of 2024. This was driven by higher new funded accounts,partially offset by lower client acquisition costs.

General and administrative expenses were HK$424.9million (US$54.1 million), an increase of 17.3% from the second quarter of 2024. The increase was primarily due to an increase in generaland administrative personnel.

Income from Operations

Income from operations increased by 125.9% toHK$3,344.0 million (US$426.0 million) from HK$1,480.3 million in the second quarter of 2024. Operating margin increased to 63.0% from47.3% in the second quarter of 2024 mainly due to strong topline growth and operating leverage.

Net Income

Net income increased by 112.7% to HK$2,572.6 million(US$327.7 million) from HK$1,209.3 million in the second quarter of 2024. Net income margin for the second quarter of 2025 increased to48.4% from 38.6% in the year-ago quarter.

Non-GAAP adjusted net income increased by 105.2%to HK$2,659.8 million (US$338.8 million) from the second quarter of 2024. Non-GAAP adjusted net income is defined as net income excludingshare-based compensation expenses. For further information, see "Use of Non-GAAP Financial Measures" at the bottom of this pressrelease.

Net Income per ADS

Basic net income per American Depositary Share(“ADS”) was HK$18.48 (US$2.35), compared with HK$8.79 in the second quarter of 2024. Diluted net income per ADS was HK$18.24(US$2.32), compared with HK$8.66 in the second quarter of 2024. Each ADS represents eight Class A ordinary shares.

Conference Call and Webcast

Futu's management will hold an earnings conferencecall on Wednesday, August 20, 2025, at 7:30 AM U.S. Eastern Time (7:30 PM on the same day, Beijing/Hong Kong Time).

Please note that all participants will need topre-register for the conference call, using the link

https://register-conf.media-server.com/register/BIdb44c44685fb4f95893e105fc2e064cd.

It will automatically lead to the registrationpage of "Futu Holdings Ltd Second Quarter 2025 Earnings Conference Call", where details for RSVP are needed.

Upon registering, all participants will be providedin confirmation emails with participant dial-in numbers and personal PINs to access the conference call. Please dial in 10 minutes priorto the call start time using the conference access information.

Additionally, a live and archived webcast ofthis conference call will be available at https://ir.futuholdings.com/.

About Futu Holdings Limited

Futu Holdings Limited (Nasdaq: FUTU) is an advancedtechnology company transforming the investing experience by offering fully digitalized financial services. Through its proprietary digitalplatforms, Futubull and moomoo, the Company provides a full range of investment services, including trade execution andclearing, margin financing and securities lending, and wealth management. The Company has embedded social media tools to create a networkcentered around its users and provide connectivity to users, investors, companies, analysts, media and key opinion leaders. The Companyalso provides corporate services, including IPO distribution, investor relations and ESOP solution services.

Use of Non-GAAP Financial Measures

In evaluating the business, the Companyconsiders and uses non-GAAP adjusted net income, a non-GAAP measure, as a supplemental measure to review and assess its operatingperformance. The presentation of the non-GAAP financial measure is not intended to be considered in isolation or as a substitute forthe financial information prepared and presented in accordance with U.S. GAAP. The Company defines non-GAAP adjusted net income asnet income excluding share-based compensation expenses. The Company presents the non-GAAP financial measure because it is used bythe management to evaluate the operating performance and formulate business plans. Non-GAAP adjusted net income enables themanagement to assess the Company's operating results without considering the impact of share-based compensation expenses, which arenon-cash charges. The Company also believes that the use of the non-GAAP measure facilitates investors' assessment of its operatingperformance.

Non-GAAP adjusted net income is not defined under U.S. GAAP and is not presented in accordance with U.S. GAAP. Thisnon-GAAP financial measure has limitations as analytical tools. One of the key limitations of using non-GAAP adjusted net income isthat it does not reflect all items of expense that affect the Company's operations. Share-based compensation expenses have been andmay continue to be incurred in the business and is not reflected in the presentation of non-GAAP adjusted net income. Further, thenon-GAAP measure may differ from the non-GAAP information used by other companies, including peer companies, and therefore theircomparability may be limited.

The Company compensates for these limitationsby reconciling the non-GAAP financial measure to the nearest U.S. GAAP performance measure, all of which should be considered when evaluatingthe Company's performance.

For more information on this non-GAAP financialmeasure, please see the table captioned "Unaudited Reconciliations of Non-GAAP and GAAP Results" set forth at the end of thispress release.

Exchange Rate Information

This announcement contains translations of certainHK dollars (“HK$”) amounts into U.S. dollars ("US$") at specified rates solely for the convenience of the reader.Unless otherwise stated, all translations from HK$ to US$ were made at the rate of HK$7.8499 to US$1.00, the noon buying rate in effecton June 30, 2025 in the H.10 statistical release of the Federal Reserve Board. The Company makes no representation that the HK$ orUS$ amounts referred could be converted into US$ or HK$, as the case may be, at any particular rate or at all.

Safe Harbor Statement

This announcement contains forward-looking statements.These statements are made under the "safe harbor" provisions of the United States Private Securities Litigation Reform Act of1995. These forward-looking statements can be identified by terminology such as "will," "expects," "anticipates," "future," "intends," "plans," "believes," "estimates" and similar statements. Amongother things, the quotations from the management team of the Company, contain forward-looking statements. Futu may also make written ororal forward-looking statements in its periodic reports to the SEC, in its annual report to shareholders, in press releases and otherwritten materials and in oral statements made by its officers, directors or employees to third parties. Statements that are not historicalfacts, including statements about Futu's beliefs and expectations, are forward-looking statements. Forward-looking statements involveinherent risks and uncertainties. A number of factors could cause actual results to differ materially from those contained in any forward-lookingstatement, including but not limited to the following: Futu's goal and strategies; Futu's expansion plans; Futu's future business development,financial condition and results of operations; Futu's expectations regarding demand for, and market acceptance of, its credit products;Futu's expectations regarding keeping and strengthening its relationships with borrowers, institutional funding partners, merchandisesuppliers and other parties it collaborates with; general economic and business conditions; and assumptions underlying or related to anyof the foregoing. Further information regarding these and other risks is included in Futu's filings with the SEC. All information providedin this press release and in the attachments is as of the date of this press release, and Futu does not undertake any obligation to updateany forward-looking statement, except as required under applicable law.

For investor inquiries, please contact:

Investor Relations

Futu Holdings Limited

ir@futuholdings.com

FUTU HOLDINGS LIMITED

UNAUDITED CONDENSED CONSOLIDATED BALANCE SHEETS

(In thousands, except for share and per sharedata)

FUTU HOLDINGS LIMITED

UNAUDITED CONDENSED CONSOLIDATED BALANCE SHEETS(Continued)

(In thousands, except for share and per sharedata)

FUTU HOLDINGS LIMITED

UNAUDITED CONDENSED CONSOLIDATED STATEMENTSOF COMPREHENSIVE INCOME

(In thousands, except for share and per sharedata)

FUTUHOLDINGS LIMITED

UNAUDITED CONDENSED CONSOLIDATED STATEMENTSOF COMPREHENSIVE INCOME (Continued)

(In thousands, except for share and per sharedata)

FUTU HOLDINGS LIMITED

UNAUDITED RECONCILIATIONS OF NON-GAAP AND GAAPRESULTS

(In thousands)

Non-GAAP to GAAP reconciling items have no income tax effect.