Lumentum (3450) Announces Completion of Cash Capital Increase for Subsidiary Yuanjie Tech

Announcement Date: 2026/05/20 Reporting Date: 2026/05/19 Reporting Time: 17:03:07 Company Code: 3450 Company Name: Lumentum

Subject: Announcement on behalf of important subsidiary, Yuanjie Technology Co., Ltd., regarding the completion of payment for 2026 cash capital increase and the record date for the capital increase.

Compliance Clause: Article 51 Date of occurrence: 2026/05/19

Explanation: 1. Date of occurrence: 2026/05/19 2. Company name: Yuanjie Technology Co., Ltd. 3. Relationship to the company: Subsidiary 4. Mutual shareholding ratio: Not applicable 5. Reasons for occurrence: Conducted in accordance with Article 9 of the "Regulations Governing the Offering and Issuance of Securities by Securities Issuers." 6. Countermeasures: None 7. Other matters to be specified: (If the subject of the event or resolution is a publicly listed company or higher, this material information also meets the criteria of Article 7, Paragraph 9 of the Enforcement Rules of the Securities and Exchange Act regarding significant impact on shareholders' equity or securities prices): (1) Yuanjie Technology Co., Ltd. issued 1,800,000 common shares for the 2026 cash capital increase at a subscription price of 218 NTD per share. The total paid-in amount of 392,400,000 NTD has been fully collected. (2) Yuanjie Technology Co., Ltd. has set 2026/05/21 as the record date for the cash capital increase.