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 OF 1934

For the month of ~~September~~October 2025

Commission File Number: 001-41362

Ostin Technology Group Co., Ltd.

(Translation of registrant’s name into English)

Building 2, 101

1 Kechuang Road

Qixia District, Nanjing

Jiangsu Province, China 210046

(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 ☐

OnOstin ~~September~~Technology ~~12,~~Group ~~2025~~Co., ~~the United States Department~~ ofLtd. ~~Justice~~ (the “~~DOJ~~Company”) ~~unsealed~~hereby anfurnishes ~~indictment~~this ofReport ~~two~~on ~~individuals~~Form 6-~~Lai~~K ~~Kui~~to ~~Sen~~report ~~and Yan Zhao (~~the ~~“Indictment”). Mr.~~matters ~~Sen~~considered ~~serves~~and asresolutions ~~Co-Chief~~passed ~~Executive~~at ~~Officer~~the meeting of ~~Ostin~~the ~~Technology~~Board ~~Group~~of ~~Co.,~~Directors ~~Ltd.~~ (the “~~Company~~Meeting”). ~~The~~held ~~indictment~~on ~~alleges~~October ~~that Mr.~~21, ~~Sen and Mr~~2025. ~~Zhao~~The ~~orchestrated~~following is a ~~securities~~summary ~~and~~of ~~wire~~the ~~fraud~~principal ~~scheme~~matters considered ~~using~~and ~~the~~resolutions ~~Company’s~~passed ~~stock~~at (the ~~“Indictment”),~~Meeting.

~~Following~~Removal ~~the unsealing~~ of ~~the~~Director ~~Indictment, the Company received a letter from the Listing Qualifications Department of The Nasdaq Stock Market (“Nasdaq”), requesting the Company to provide certain information~~ and~~/or documents related to the Indictment, as well as the Company’s filings with the U.S.~~ Securities and Exchange Commission (the “SEC”), and its public disclosures and other publicly available information. The trading of Class A ordinary shares of the Company on Nasdaq was halted on September 12, 2025 pending the receipt of the additional requested information and will remain halted until the Company has fully satisfied Nasdaq’s request for additional information.Officer

The ~~Company~~Meeting ~~will~~was ~~form~~duly aconstituted with ~~special~~all ~~committee of independent~~ directors ~~(the~~having ~~“Special~~received ~~Committee”)~~notice, toor ~~investigate~~waived the ~~allegations~~notice ~~set~~period, ~~forth~~and ina ~~the~~quorum ~~Indictment.~~present ~~The~~in ~~Special~~accordance ~~Committee~~with ~~will engage~~the ~~outside~~current ~~counsel~~effective Memorandum toand ~~conduct~~Articles anof ~~independent~~Association ~~internal~~of ~~investigation~~the toCompany ~~review~~(the ~~such~~“Memorandum ~~allegations~~and Articles”). The ~~Company~~Board ~~cannot~~noted ~~predict~~that Yan Zhao and Lai ~~the~~Kui ~~duration~~Sen ofhave ~~the~~been ~~investigation,~~indicted ~~eventual~~for ~~scope~~various offenses, ~~its~~including ~~outcome,~~conspiracy orto ~~its~~commit ~~impact~~securities onfraud ~~the~~and ~~Company’s~~wire ~~financial~~fraud, ~~results.~~in ~~The~~the ~~Company~~United isStates ~~conferring~~District ~~with~~Court for the ~~legal~~Eastern ~~counsel~~District ~~regarding~~of Virginia (the ~~procedure~~“Indictment”). ofAt ~~removal~~the ~~and~~time ~~suspension~~ of the ~~position~~Meeting, ofMr. Lai Kui Sen, ~~who~~served as isa director and Co-Chief Executive Officer ~~and~~of ~~director,~~the ~~pursuant~~Company. toA copy of the ~~current~~Indictment ~~effective~~was ~~memorandum~~tabled and ~~articles~~considered ofin ~~association~~detail ofby the ~~Company~~directors present.

In ~~addition,~~accordance ~~the~~with ~~Company~~Article 29(e) ~~received~~of athe ~~grand~~Memorandum ~~jury subpoena~~and ~~dated~~Articles, ~~July~~the ~~18,~~Board ~~2025,~~resolved ~~issued~~that byMr. ~~United~~Lai ~~States~~Kui ~~Attorney~~Sen ~~for~~be ~~the~~removed ~~Eastern~~as ~~District~~a director of ~~Virginia (~~the ~~“USAO”)~~Company towith ~~produce~~immediate effect. aFurther, ~~range~~pursuant ofto ~~documents~~Article ~~and communications~~34.6 ~~The~~of ~~Company~~the isMemorandum ~~cooperating~~and ~~with~~Articles, ~~the~~Mr. ~~USAO~~Lai ~~and~~Kui ~~will~~Sen ~~submit~~was removed from the ~~requested~~office ~~documents~~of toCo-Chief ~~the~~Executive ~~USAO~~Officer asof ~~soon~~the asCompany, ~~practicable~~also with immediate effect.

The Board authorized Maples Corporate Services Limited to update the Register of Directors and Officers of the Company and to attend to all necessary filings with the Registrar of Companies relating to these removals.

Establishment of Special Committee

A special committee of the Board of Directors (the “Committee”), comprised of the independent directors, was established in accordance with the applicable provisions of the Companies Act (As Revised) of the Cayman Islands (the “Companies Act”) and the Memorandum and Articles. The Committee is tasked with investigating the facts and circumstances outlined in the Indictment and will provide a comprehensive report to the Board.

Heung Ming Wong, John Carl Mein, and Qiang He, each of whom is an independent director, were appointed as members of the Committee, with John Carl Mein appointed as chairman. The Committee will act in accordance with the requirements of the Companies Act and the Memorandum and Articles, and shall provide reports to the Board detailing the powers exercised and the manner of their exercise.

The Board further authorized and directed the Company’s directors and officers to provide the Committee with all information and materials deemed useful or helpful by the Committee in fulfilling its responsibilities. The Committee is empowered to take any other actions it considers necessary or appropriate to carry out its mandate.

Any director is authorized, in their sole discretion, to execute and deliver any agreements, notices, certificates, authorizations, or other ancillary documents necessary or desirable to effect the removal of Mr. Lai Kui Sen and the establishment of the Committee. Any such documents executed by a director shall be valid and binding on the Company. All prior actions taken by any director, officer, or agent in connection with these matters are confirmed, ratified, and approved in all respects.

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.

	Ostin Technology Group Co., Ltd.

	By:	/s/ Tao Ling
	Name:	Tao Ling
	Title:	Chief Executive Officer

Date: ~~September~~October 2621, 2025

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