【Yongshen-KY】Announcement on the Results of Price Stabilization Operations for the First Five Business Days After Listing

1. Date of occurrence of the event: 2026/05/07 2. Company name: Yongsheng Biotechnology Co., Ltd. 3. Relationship with the company (please enter "this company" or "subsidiary"): This company 4. Mutual shareholding ratio: Not applicable 5. Reason for occurrence: In accordance with the "Key Points for Underwriting Operations by Securities Underwriters for Initial Public Listings (OTC) Cases" of the Securities Dealers Association of the Republic of China, this announcement provides the results of the company's price stabilization operations for the first five business days after listing. (1) Lead Underwriter: Taishin Securities Co., Ltd. (2) Stock Name, Code: Yongshen-KY (Stock Code: 4178) (3) Actual Overallotment Quantity: 100,000 shares (4) Offering Price: NT$19.15 per share (5) Proceeds from Overallotment: NT$1,915,000 (6) Period of Stabilization Operation: 2026/4/30, 2026/5/4~2026/5/7 (7) Accumulated quantity purchased by the "Price Stabilization Operation Account" of the lead underwriter: 100,000 shares 6. Countermeasures: None 7. Other matters that need to be specified (if the subject of the event or resolution is a public company or above, this material information also complies with Article 7, Paragraph 9 of the Enforcement Rules of the Securities and Exchange Act regarding matters that have a material impact on shareholders' equity or securities prices): None