SUGP 6-K

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

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 OF1934

For the month of August 2026

Commission File Number: 001-41927

SU Group Holdings Limited

(Registrant’s Name)

7th Floor, The Rays

No. 71 Hung To Road, Kwun Tong

Kowloon, Hong Kong

(Address of Principal Executive Offices)

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

Form 20-F ☒ Form 40-F ☐

AMENDMENT OF OUTSTANDING WARRANTS

On August [●], 2026, SU Group Holdings Limited (the “Company”) entered into amendments (the “Warrant Amendments”) with the holders of certain outstanding purchase warrants to acquire Class A ordinary shares of the Company (the “Warrants”) originally issued in connection with the Company’s public offering completed on May 13, 2026.

The Warrants were originally issued with an exercise price of US$5.50 per Class A ordinary share. Effective June 17, 2026, the Company, with the requisite approval of the holders of the Warrants, reduced the exercise price of the Warrants to US$0.87 per Class A ordinary share. Following the Company’s 1-for-5 reverse share split effective August 6, 2026, the Exercise Price and Exercise Price Floor of the Warrants were adjusted to US$4.35 per Class A ordinary share and the number of Warrant Shares then outstanding was proportionately adjusted in accordance with the terms of the Warrants.

For purposes of the Warrant Amendments, the Company and the holders agreed to use the holder-specific pre-consolidation equivalent Warrant Share balances reflected in the Company’s warrant exercise records as of August 10, 2026. In the aggregate, those balances represented 34,370,035 Warrant Shares at an exercise price of US$0.87 per share, representing aggregate potential cash exercise proceeds of approximately US$29,901,930.45.

Pursuant to the Warrant Amendments, the Exercise Price and Exercise Price Floor of the Warrants were each reduced to US$0.70 per Class A ordinary share. In connection with that reduction, the number of Warrant Shares was adjusted on a holder-by-holder basis so that the aggregate exercise proceeds represented by each holder’s agreed pre-consolidation equivalent Warrant Share balance at US$0.87 per share are substantially preserved. The adjusted Warrant Share amount for each holder is calculated by multiplying the applicable pre-consolidation equivalent Warrant Share balance by US$0.87 and dividing the resulting aggregate exercise proceeds by US$0.70. Applying this methodology, the Warrants are exercisable for approximately 42,717,043.50 Warrant Shares in the aggregate at an Exercise Price of US$0.70 per share, representing aggregate potential cash exercise proceeds of approximately US$29,901,930.45, subject to rounding and the other terms of the Warrants.

The Warrant Amendments acknowledge that the adjusted Warrant Shares are determined by the foregoing economic-preservation mechanic and are not limited to the number of Class A ordinary shares currently covered for resale by the applicable holder under the Company’s existing effective registration statements. Unless the Company and the applicable holder otherwise agree in writing, a holder may not exercise its Warrant, and the Company is not required to issue Warrant Shares upon exercise, to the extent such exercise and issuance would result in Warrant Shares being issued in excess of the registration coverage then available to such holder under an effective registration statement, as determined by the Company in good faith. Any adjusted Warrant Shares that are not then exercisable solely as a result of this limitation remain outstanding under the applicable Warrant and become exercisable when and to the extent sufficient registration coverage becomes effective.

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The Warrant Amendments do not modify the Termination Date of the Warrants. Except for the adjustments expressly effected by the Warrant Amendments, including the adjustments to the Exercise Price, Exercise Price Floor and number of Warrant Shares, the remaining terms of the Warrants remain unchanged and in full force and effect.

The Company’s board of directors approved the Warrant Amendments after considering, among other things, the Company’s capital requirements, prevailing market conditions, the trading price and volume of the Company’s Class A ordinary shares, the potential opportunity to generate additional capital through exercises of the Warrants, the preservation of the aggregate exercise proceeds represented by the remaining Warrants and the potential dilution resulting from the increase in Warrant Shares.

There can be no assurance that any holder will exercise any Warrants or that the Company will receive any proceeds from exercises of the Warrants.

The foregoing description of the Warrant Amendments does not purport to be complete and is qualified in its entirety by reference to the form of Warrant Amendment furnished as Exhibit 4.1 to this Report on Form 6-K.

INCORPORATION BY REFERENCE

The information contained in this Report on Form 6-K, including Exhibit 4.1 hereto, is hereby incorporated by reference into the Company’s Registration Statement on Form F-3 (File No. 333-284868), including the prospectuses contained therein, and shall be deemed to be a part thereof from the date on which this Report on Form 6-K is furnished, to the extent not superseded by documents or reports subsequently filed or furnished.

EXHIBIT INDEX

Exhibit No.	Description of Exhibit
4.1	Form of Amendment to Purchase Warrant

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.

		SU GROUP HOLDINGS LIMITED
Date: August 21, 2026	By:	/s/ Chan Ming Dave
		Chan Ming Dave
		Chief Executive Officer

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Exhibit4.1

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FORMOFAMENDMENT TO PURCHASE WARRANT

SUGROUP HOLDINGS LIMITED

THISAMENDMENT TO PURCHASE WARRANT (this “Amendment”) is made as of August __, 2026 (the “Amendment Date”), by andbetween SU Group Holdings Limited, a Cayman Islands exempt company (the “Company”), and [HOLDER] (the “Holder”).

RECITALS

A.		On May 13, 2026, the Company issued<br> to the Holder a Purchase Warrant (as previously adjusted and as adjusted for the Company’s 1-for-5 reverse share split effective<br> August 6, 2026, the “Warrant”) to purchase Class A Ordinary Shares of the Company.
B.		Section 3(i) of the Warrant permits the Company, subject<br> to the prior written consent of the Holder, to reduce the then-current Exercise Price, subject to Section 3(j) of the Warrant and the<br> rules and regulations of the Trading Market. Section 5(l) of the Warrant permits the Warrant to be modified or amended with the written<br> consent of the Company and the Required Holders.
C.		The Company and the Holder desire to amend the Warrant<br> to (i) set the Exercise Price at US$0.70 per Class A Ordinary Share, (ii) set the Exercise Price Floor at US$0.70 per Class A Ordinary<br> Share, and (iii) make a one-time adjustment to the number of Warrant Shares so that, subject to rounding under the Warrant, the aggregate<br> exercise proceeds represented by the Holder’s remaining Warrant Shares are preserved.
D.		For purposes of determining the one-time adjustment contemplated by this Amendment, the parties agree to use [●] Warrant Shares at an Exercise Price of US$0.87 per share, being the Holder’s pre-consolidation equivalent Warrant Share balance reflected in the Company’s warrant exercise records as of August 10, 2026. Such Warrant Shares represented aggregate exercise proceeds of US$[●]. The parties further desire that any exercise and issuance of the adjusted Warrant Shares remain subject to the registration limitations set forth in Section 5 of this Amendment.

NOW,THEREFORE, in consideration of the mutual covenants contained herein and for other good and valuable consideration, the receipt and sufficiency of which are hereby acknowledged, the parties agree as follows:

1.Defined Terms. Capitalized terms used but not defined in this Amendment have the meanings given to them in the Warrant.

2.Exercise Price. Notwithstanding Section 2(b), Section 3(i) or any other provision of the Warrant, effective as of the Amendment Date, the Exercise Price is hereby set at US$0.70 per Class A Ordinary Share, subject to further adjustment after the Amendment Date in accordance with the Warrant, as amended hereby.

3.Exercise Price Floor. Notwithstanding Section 3(j) or any other provision of the Warrant, effective as of the Amendment Date, the Exercise Price Floor is hereby set at US$0.70 per Class A Ordinary Share, subject to further adjustment after the Amendment Date in accordance with Section 3(l) and the other applicable provisions of the Warrant. The parties acknowledge and agree that the one-time adjustment to the number of Warrant Shares arising from the reductions effected by this Amendment is determined exclusively pursuant to Section 4 below, and no additional adjustment to the number of Warrant Shares shall arise solely by reason of the reductions effected by this Amendment.

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4.One-Time Adjustment to Warrant Shares. In connection with the reductions to the Exercise Price and Exercise Price Floor effected by this Amendment, and in order to preserve substantially the aggregate exercise proceeds represented by the Holder’s remaining Warrant Shares on the agreed pre-consolidation equivalent basis described in Recital D, the parties agree that the number of Warrant Shares purchasable under the Warrant immediately following effectiveness of this Amendment shall be adjusted as set forth below. The Adjusted Warrant Shares were calculated by multiplying the Pre-Consolidation Equivalent Warrant Shares by US$0.87 and dividing the resulting aggregate exercise proceeds by US$0.70, with the resulting Warrant Share amount calculated to the nearest 1/100th of a share in accordance with Section 3(g) of the Warrant:

Warrant Shares immediately prior to this Amendment (post-consolidation)	[●]
Pre-Consolidation Equivalent Warrant Shares used for economic baseline	[●]
Baseline Exercise Price	US$0.87
Baseline Aggregate Exercise Proceeds	US$[●]
Adjusted Warrant Shares immediately following this Amendment	[●]
Increase over Warrant Shares immediately prior to this Amendment	[●]
Exercise Price / Exercise Price Floor	US$0.70<br> / US$0.70

The parties acknowledge and agree that the Adjusted Warrant Shares set forth above at an Exercise Price of US$0.70 per share are intended to represent aggregate exercise proceeds substantially equal, subject to rounding, to the Baseline Aggregate Exercise Proceeds set forth above. The Adjusted Warrant Shares set forth above constitute the full and complete adjustment to the number of Warrant Shares arising solely from the reductions to the Exercise Price and Exercise Price Floor effected by this Amendment. For the avoidance of doubt, this paragraph does not waive or modify any adjustment that may arise after the Amendment Date from a subsequent event or adjustment under the Warrant that is independent of the amendments effected hereby.

5.Registration Matters; Limitation on Exercise of Excess Warrant Shares. The parties acknowledge that the Adjusted Warrant Shares set forth in Section 4 are determined by the economic-preservation mechanic described therein and are not limited to the number of Class A Ordinary Shares currently covered for resale by the Holder under the Company’s Registration Statement on Form F-1 (File No. 333-296734) and the prospectus forming a part thereof (the “Resale Registration Statement”). Notwithstanding the foregoing, unless the Company and the Holder otherwise agree in writing, the Holder shall not exercise this Warrant, and the Company shall not be required to issue Warrant Shares upon exercise, to the extent that such exercise and issuance would result in Warrant Shares being issued in excess of the number of Warrant Shares then covered for resale by the Holder under an effective registration statement, after giving effect to any applicable share split or combination and any prior resales under such registration statement, as determined by the Company in good faith. Any Adjusted Warrant Shares that are not then exercisable solely as a result of the foregoing limitation shall remain outstanding under the Warrant and shall become exercisable when and to the extent sufficient registration coverage becomes effective. Nothing in this Amendment constitutes a representation or warranty that a registration statement or prospectus will be effective or available for any particular exercise or resale. The rights and obligations of the Company and the Holder under the Registration Rights Agreement remain in full force and effect and are not amended or waived by this Amendment.

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6.Holder Consent; Required Holders. The Holder hereby provides the prior written consent contemplated by Section 3(i) of the Warrant and consents to the amendments set forth herein for purposes of Section 5(l) of the Warrant. This Amendment will become effective only upon the Company having received written consent to the amendments contemplated hereby from the Required Holders. By executing this Amendment, the Holder also consents to the Company entering into substantially similar amendments with the other holders of Warrants, with holder-specific differences in the applicable pre-consolidation equivalent Warrant Share balance, aggregate exercise proceeds and Adjusted Warrant Shares.

7.Ratification. Except as expressly amended by this Amendment, the Warrant remains unchanged and in full force and effect. From and after the Amendment Date, each reference in the Warrant to “this Warrant,” “hereunder,” “hereof” or words of similar import shall be deemed to refer to the Warrant as amended by this Amendment. In the event of any conflict between this Amendment and the Warrant, this Amendment controls.

8.Governing Law. This Amendment shall be governed by and construed in accordance with the governing law and jurisdiction provisions set forth in Section 5(e) of the Warrant, which provisions are incorporated herein by reference.

9.Counterparts; Electronic Signatures. This Amendment may be executed in counterparts, each of which will be deemed an original and all of which together will constitute one instrument. Signatures delivered by electronic transmission, including PDF or electronic signature, shall be effective as originals.

[SignaturePage Follows]

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INWITNESS WHEREOF, the parties have executed this Amendment as of the Amendment Date.

SU GROUP HOLDINGS LIMITED<br><br> <br>By: ______________________________<br><br> <br>Name:<br> Chan Ming Dave<br><br> <br>Title:<br> Chief Executive Officer	[HOLDER]<br><br> <br><br> By: ______________________________<br><br> Name: ____________________________<br><br> Title (if applicable): _______________

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