[6-K] Ostin Technology Group Co., Ltd. Current Report (Foreign Issuer)

Ostin Technology Group Co., Ltd. reported that its Chief Technology Officer, Xiaodong Zhai, has tendered his resignation effective February 28, 2026.

Rhea-AI Filing Summary

Ostin Technology Group Co., Ltd. reported that its Chief Technology Officer, Xiaodong Zhai, has tendered his resignation effective February 28, 2026. The company states that Mr. Zhai is leaving for personal reasons and that his departure does not arise from any disagreement with the company on any matter.

As of this report, Ostin has not yet identified a new CTO, indicating that its technology leadership role remains vacant for now while the company searches for a successor.

Insights

Corporate governance analyst

Ostin loses its CTO for personal reasons, with the role still vacant.

The resignation of the Chief Technology Officer is meaningful because this role typically oversees product development, technology strategy, and R&D. The company clarifies that Xiaodong Zhai is leaving for personal reasons and not due to any dispute with management.

The absence of a named replacement suggests a transitional period for technology leadership. Execution in product and engineering areas may depend on how quickly and effectively a new CTO is appointed and integrated, which future company communications may clarify.

Key Terms

Chief Technology Officer, Form 6-K, foreign private issuer

3 terms

Chief Technology Officer financial

"Resignation of Chief Technology Officer Xiaodong Zhai"

The chief technology officer is the senior executive who sets a company's technology vision and oversees development, engineering, and technical operations—think of them as the lead architect and head mechanic who decides what tools the business builds and how they run. Their choices affect product direction, cost structure, cybersecurity and scalability, so investors watch the CTO to gauge a company’s ability to innovate, compete and manage technical risk.

Form 6-K regulatory

"FORM 6-K REPORT OF FOREIGN PRIVATE ISSUER"

A Form 6-K is a report that companies listed in certain countries file to provide important updates, such as financial results, corporate changes, or other significant information, to regulators and investors. It functions like an official company update or news release, helping investors stay informed about developments that could affect their investment decisions.

foreign private issuer regulatory

"REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16"

A foreign private issuer is a company organized outside the United States that meets tests showing it is primarily foreign-controlled and therefore qualifies for a different set of U.S. reporting rules. For investors, that means the company files less frequent or differently formatted disclosures with U.S. regulators and may follow home-country accounting and governance practices, so buying its stock is like dining at a well-reviewed restaurant that follows its home kitchen’s rules instead of the local menu — you get access but should check what standards apply.

FAQ

Why did Ostin Technology Group (OST) announce its CTO’s resignation?

Ostin Technology Group reported that Chief Technology Officer Xiaodong Zhai resigned effective February 28, 2026. The company states he left for personal reasons and that his resignation was not due to any disagreement with Ostin on any matter.

When is Ostin Technology Group’s CTO resignation effective?

The resignation of Ostin Technology Group’s Chief Technology Officer, Xiaodong Zhai, is effective February 28, 2026. This date marks the end of his service as CTO, after which the technology leadership role will need to be filled by a successor.

Did Ostin Technology Group (OST) report any disagreement with the resigning CTO?

No. Ostin Technology Group explicitly states that CTO Xiaodong Zhai resigned for personal reasons and not because of any disagreement with the company on any matter. This language aims to reassure investors that no reported internal dispute triggered his departure.

Has Ostin Technology Group (OST) named a new Chief Technology Officer?

As of this report, Ostin Technology Group has not identified a new CTO. The company indicates the position remains vacant, implying an ongoing search or interim arrangements until it appoints a successor to lead its technology function.

What does a CTO resignation mean for Ostin Technology Group (OST) investors?

The CTO oversees technology strategy and product development, so a resignation can affect leadership continuity. Ostin Technology Group notes that Xiaodong Zhai left for personal reasons, and a replacement has not yet been identified, leaving short-term uncertainty around technology leadership.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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Accepted by SEC EDGAR 04/01/2026 - 08:50 AM Learn about SEC filing dates

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 February 2026

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 ☐

Resignation of Chief Technology Officer

Xiaodong Zhai (“Mr. Zhai”) tendered his resignation from his position as Chief Technology Officer (“CTO”) of Ostin Technology Group Co., Ltd. (the “Company”), effective February 28, 2026. Mr. Zhai resigned for personal reasons and not as a result of any disagreement with the Company on any matter. As of the date of this report, the Company has not identified a new CTO.

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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: April 1, 2026

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