SCHEDULE 13G/A 0002069591 XXXXXXXX LIVE 1 Class A Ordinary Shares, $0.001 par value per share 06/19/2025 0001803407 Ostin Technology Group Co., Ltd. G67927114 Building 2, 101, 1 Kechuang Road, Qixia District, , Nanjing Jiangsu Province F4 210046 Rule 13d-1(c) LIAO YEN-KAI F5 3888517.00 0.00 3888517.00 0.00 3888517.00 N 3.62 IN (1) Represents 3,888,517 Class A Ordinary Shares held by LIAO YEN-KAI. (2) The percentage of the class of securities is calculated by dividing the number of shares beneficially owned by the reporting person by all of the issuer's issued and outstanding Class A ordinary shares as of May 12, 2025, as provided by the issuer in the Form 6-K filed on May 12, 2025 and the Form 20-F filed on January 17, 2025 by the issuer, 107,430,032 Class A ordinary shares and 200,000 Class B ordinary shares are issued and outstanding. The shares beneficially owned by the reporting person represents 3.62% of the total outstanding Class A Ordinary Shares. The shares beneficially owned by the reporting person represents 3.05% of the total outstanding voting power. The percentage of voting power is calculated by dividing the voting power beneficially owned by the reporting person by the voting power beneficially owned by all of the issuer's holders of Class A ordinary shares and Class B ordinary shares as a single class as of May 12, 2025. Each holder of the Class A ordinary share is entitled to one vote per share and each holder of the Class B ordinary share is entitled to 100 votes per share. Ostin Technology Group Co., Ltd. Building 2, 101, 1 Kechuang Road, Qixia District, Nanjing, Jiangsu Province, China 210046 LIAO YEN-KAI NO. 17, LN. 72, SONGJIANG ST., BANQIAO DIST., NEW TAIPEI CITY 220027, TAIWAN Taiwan Y According to the Form 6-K filed on May 12, 2025 by the issuer, 107,430,032 Class A ordinary shares are issued and outstanding. As of the date hereof, LIAO YEN-KAI holds 3,888,517 Class A Ordinary Shares and no longer owns more than five percent of the Class A ordinary shares. This filing represents an exit filing for the reporting person. 3.62% 3,888,517 Class A Ordinary Shares 0 3,888,517 Class A Ordinary Shares 0 N Y Y Y Y Y N By signing below I certify that, to the best of my knowledge and belief, the securities referred to above were not acquired and are not held for the purpose of or with the effect of changing or influencing the control of the issuer of the securities and were not acquired and are not held in connection with or as a participant in any transaction having that purpose or effect, other than activities solely in connection with a nomination under ?? 240.14a-11. LIAO YEN-KAI /s/ LIAO YEN-KAI 06/25/2025