Ostin Technology Group Co., Ltd. SEC filings OST
Ostin Technology Group Co., Ltd. has 134 filings in SEC EDGAR's recent list, going back to Sep 28, 2020. Its latest annual report, Form 20-F, was filed on Jan 26, 2026 for the period ended Sep 30, 2025. The most recent current report (Form 6-K) was filed on Jun 18, 2026. The company's fiscal year ends on September 30.
| Form | Description | Filed | Period |
|---|---|---|---|
| 6-K | Current report (foreign issuer) | Jun 18, 2026 | Mar 31, 2026 |
| 3 | Initial insider ownership | Apr 2, 2026 | Mar 18, 2026 |
| 3 | Initial insider ownership | Apr 2, 2026 | Mar 18, 2026 |
| 3 | Initial insider ownership | Apr 2, 2026 | Mar 18, 2026 |
| 6-K | Current report (foreign issuer) | Apr 1, 2026 | Apr 1, 2026 |
| 20-F | Annual report (foreign issuer) | Jan 26, 2026 | Sep 30, 2025 |
| 6-K | Current report (foreign issuer) | Jan 8, 2026 | Jan 8, 2026 |
| 6-K | Current report (foreign issuer) | Nov 13, 2025 | Nov 13, 2025 |
| 6-K | Current report (foreign issuer) | Oct 21, 2025 | Oct 21, 2025 |
| 6-K | Current report (foreign issuer) | Sep 26, 2025 | Sep 26, 2025 |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Aug 14, 2025 | — |
| 6-K | Current report (foreign issuer) | Aug 6, 2025 | Aug 6, 2025 |
| 6-K | Current report (foreign issuer) | Jul 18, 2025 | Jul 18, 2025 |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Jul 15, 2025 | — |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Jul 15, 2025 | — |
| 6-K/A | Amendment no. 1 to form 6-k | Jul 10, 2025 | Jul 10, 2025 |
| 6-K | Current report (foreign issuer) | Jul 3, 2025 | Jul 3, 2025 |
| 6-K | Current report (foreign issuer) | Jul 1, 2025 | Jun 30, 2025 |
| 424B5 | Prospectus supplement | Jun 30, 2025 | — |
| SCHEDULE 13G | Ownership over 5% (passive) | Jun 30, 2025 | — |
| 6-K | Current report (foreign issuer) | Jun 30, 2025 | Mar 31, 2025 |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Jun 25, 2025 | — |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Jun 25, 2025 | — |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Jun 13, 2025 | — |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Jun 13, 2025 | — |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Jun 13, 2025 | — |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Jun 13, 2025 | — |
| SCHEDULE 13G | Ownership over 5% (passive) | May 29, 2025 | — |
| SCHEDULE 13G | Ownership over 5% (passive) | May 29, 2025 | — |
| SCHEDULE 13G | Ownership over 5% (passive) | May 29, 2025 | — |
| SCHEDULE 13G | Ownership over 5% (passive) | May 29, 2025 | — |
| SCHEDULE 13G | Ownership over 5% (passive) | May 29, 2025 | — |
| SCHEDULE 13G | Ownership over 5% (passive) | May 29, 2025 | — |
| SCHEDULE 13G | Ownership over 5% (passive) | May 29, 2025 | — |
| SCHEDULE 13G | Ownership over 5% (passive) | May 29, 2025 | — |
| 6-K | Current report (foreign issuer) | May 12, 2025 | May 12, 2025 |
| 6-K | Current report (foreign issuer) | May 2, 2025 | May 2, 2025 |
| 6-K | Current report (foreign issuer) | Apr 16, 2025 | Apr 16, 2025 |
| 424B5 | Prospectus supplement | Apr 15, 2025 | — |
| 6-K | Current report (foreign issuer) | Apr 9, 2025 | Apr 9, 2025 |
| 6-K | Current report (foreign issuer) | Apr 1, 2025 | Apr 1, 2025 |
| 6-K | Current report (foreign issuer) | Mar 21, 2025 | Mar 21, 2025 |
| 144 | Notice of proposed sale | Mar 4, 2025 | — |
| 6-K | Current report (foreign issuer) | Feb 14, 2025 | Feb 14, 2025 |
| 20-F | Annual report (foreign issuer) | Jan 27, 2025 | Sep 30, 2024 |
| 6-K | Current report (foreign issuer) | Jan 23, 2025 | Jan 23, 2025 |
| 6-K | Current report (foreign issuer) | Jan 21, 2025 | Jan 17, 2025 |
| 6-K/A | Amendment no. 1 to form 6-k | Dec 23, 2024 | Dec 23, 2024 |
| 6-K | Current report (foreign issuer) | Dec 20, 2024 | Dec 20, 2024 |
| 6-K | Current report (foreign issuer) | Nov 27, 2024 | Nov 27, 2024 |
| 424B5 | Prospectus supplement | Nov 19, 2024 | — |
| 6-K | Current report (foreign issuer) | Nov 8, 2024 | Nov 8, 2024 |
| 144 | Notice of proposed sale | Oct 11, 2024 | — |
| 144 | Notice of proposed sale | Oct 11, 2024 | — |
| 6-K | Current report (foreign issuer) | Oct 4, 2024 | Oct 4, 2024 |
| EFFECT | Filing | Sep 5, 2024 | — |
| CORRESP | Letter to the SEC | Sep 3, 2024 | — |
| F-1/A | Amendment no. 1 to form f-1 | Aug 30, 2024 | — |
| 6-K | Current report (foreign issuer) | Aug 26, 2024 | Mar 31, 2024 |
| 6-K | Current report (foreign issuer) | Jul 24, 2024 | Jul 24, 2024 |
| UPLOAD | Letter from the SEC | Jul 3, 2024 | — |
| F-1 | Registration statement (foreign issuer) | Jun 28, 2024 | — |
| 6-K | Current report (foreign issuer) | Jun 27, 2024 | Jun 27, 2024 |
| 424B5 | Prospectus supplement | Jun 21, 2024 | — |
| EFFECT | Filing | May 28, 2024 | — |
| 144 | Notice of proposed sale | May 24, 2024 | — |
| 144 | Notice of proposed sale | May 24, 2024 | — |
| CORRESP | Letter to the SEC | May 24, 2024 | — |
| UPLOAD | Letter from the SEC | May 13, 2024 | — |
| F-3 | Shelf registration (foreign issuer) | May 7, 2024 | — |
| 6-K | Current report (foreign issuer) | Apr 2, 2024 | Apr 2, 2024 |
| 6-K | Current report (foreign issuer) | Mar 14, 2024 | Mar 14, 2024 |
| SC 13D | Ownership over 5% (active) | Feb 20, 2024 | — |
| SC 13G | Ownership over 5% (passive) | Feb 14, 2024 | — |
| SC 13G | Ownership over 5% (passive) | Feb 14, 2024 | — |
| 6-K | Current report (foreign issuer) | Feb 7, 2024 | Feb 7, 2024 |
| 20-F | Annual report (foreign issuer) | Jan 31, 2024 | Sep 30, 2023 |
| D | Filing | Jan 26, 2024 | — |
| 6-K | Current report (foreign issuer) | Jan 26, 2024 | Jan 26, 2024 |
| 6-K | Current report (foreign issuer) | Jan 24, 2024 | Jan 24, 2024 |
| 144 | Notice of proposed sale | Nov 20, 2023 | — |
| 6-K | Current report (foreign issuer) | Oct 4, 2023 | Oct 4, 2023 |
| 6-K | Current report (foreign issuer) | Sep 28, 2023 | Sep 28, 2023 |
| 6-K | Current report (foreign issuer) | Aug 30, 2023 | Aug 30, 2023 |
| 6-K | Current report (foreign issuer) | Aug 15, 2023 | Aug 15, 2023 |
| 6-K | Current report (foreign issuer) | Aug 3, 2023 | Mar 31, 2023 |
| 20-F | Annual report (foreign issuer) | Feb 16, 2023 | Sep 30, 2022 |
| NT 20-F | Notification of late filing | Jan 31, 2023 | Sep 30, 2022 |
| 6-K | Current report (foreign issuer) | Aug 19, 2022 | Aug 19, 2022 |
| 6-K | Current report (foreign issuer) | Jul 26, 2022 | Jul 26, 2022 |
| 6-K | Current report (foreign issuer) | May 5, 2022 | May 5, 2022 |
| 424B4 | Prospectus | Apr 29, 2022 | — |
| EFFECT | Filing | Apr 26, 2022 | — |
| CERT | 8a cert | Apr 26, 2022 | — |
| 8-A12B | For registration of certain classes | Apr 26, 2022 | — |
| CORRESP | Letter to the SEC | Apr 22, 2022 | — |
| CORRESP | Letter to the SEC | Apr 22, 2022 | — |
| F-1/A | Amendment no. 11 to form f-1 | Mar 30, 2022 | — |
| CORRESP | Letter to the SEC | Mar 29, 2022 | — |
| UPLOAD | Letter from the SEC | Mar 16, 2022 | — |
| CORRESP | Letter to the SEC | Feb 23, 2022 | — |
| F-1/A | Amendment no. 10 to form f-1 | Feb 23, 2022 | — |
| UPLOAD | Letter from the SEC | Feb 14, 2022 | — |
| F-1/A | Amendment no. 9 to form f-1 | Jan 31, 2022 | — |
| CORRESP | Letter to the SEC | Jan 28, 2022 | — |
| UPLOAD | Letter from the SEC | Jan 4, 2022 | — |
| F-1/A | Amendment no. 8 to form f-1 | Dec 21, 2021 | — |
| CORRESP | Letter to the SEC | Dec 20, 2021 | — |
| UPLOAD | Letter from the SEC | Dec 17, 2021 | — |
| F-1/A | Amendment no. 7 to form f-1 | Dec 6, 2021 | — |
| CORRESP | Letter to the SEC | Dec 6, 2021 | — |
| UPLOAD | Letter from the SEC | Dec 1, 2021 | — |
| F-1/A | Amendment no. 6 to form f-1 | Nov 4, 2021 | — |
| CORRESP | Letter to the SEC | Nov 3, 2021 | — |
| UPLOAD | Letter from the SEC | Oct 28, 2021 | — |
| CORRESP | Letter to the SEC | Oct 12, 2021 | — |
| F-1/A | Amendment no. 5 to form f-1 | Oct 12, 2021 | — |
| UPLOAD | Letter from the SEC | Oct 8, 2021 | — |
| F-1/A | Amendment no. 4 to form f-1 | Sep 21, 2021 | — |
| CORRESP | Letter to the SEC | Sep 20, 2021 | — |
| UPLOAD | Letter from the SEC | Sep 16, 2021 | — |
| F-1/A | Amendment no. 3 to form f-1 | Aug 30, 2021 | — |
| CORRESP | Letter to the SEC | Aug 30, 2021 | — |
| UPLOAD | Letter from the SEC | Aug 20, 2021 | — |
| CORRESP | Letter to the SEC | Jul 20, 2021 | — |
| F-1/A | Amendment no. 2 to form f-1 | Jul 20, 2021 | — |
| UPLOAD | Letter from the SEC | Jun 25, 2021 | — |
| F-1/A | Amendment no. 1 to form f-1 | Jun 23, 2021 | — |
| CORRESP | Letter to the SEC | Jun 22, 2021 | — |
| UPLOAD | Letter from the SEC | Mar 30, 2021 | — |
| CORRESP | Letter to the SEC | Mar 5, 2021 | — |
| F-1 | Registration statement (foreign issuer) | Mar 5, 2021 | — |
| UPLOAD | Letter from the SEC | Oct 23, 2020 | — |
| DRS | Filing | Sep 28, 2020 | — |
Showing 134 filings. Main filings leave out insider and ownership forms such as Form 4; choose a type above to see them. Each form opens on SEC.gov. Older filings are on SEC EDGAR.
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Company profile
- Industry
- Electronic Components, NEC (SIC 3679)
- Listed as
- OST (Nasdaq)
- Fiscal year ends
- September 30
- Incorporated in
- Cayman Islands
- Headquarters
- Nanjiang Jiangsu, China
- SEC filer status
- Non-accelerated filer, Emerging growth company
- SEC CIK
- 1803407
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Source: SEC EDGAR filings. This is company-reported data, not investment advice.