Q1 2026 Quarterly Report (47th Fiscal Year)

Quarterly Report 6.5 Hanmi Semiconductor Co., Ltd. 1 Y 120111-0038423 Quarterly Report (47th Fiscal Year, Q1) Fiscal Year: From January 1, 2026 to March 31, 2026 To: Financial Services Commission / Korea Exchange Date: May 15, 2026 Filing Entity Type: Listed Stock Corporation Exemption Reason: Not Applicable Company Name: Hanmi Semiconductor Co., Ltd. CEO: Kwak Dong-shin Head Office: 14, Gajwa-ro 30beon-gil, Seo-gu, Incheon (Gajwa-dong) Phone: 032-571-9100 Website: http://www.hanmisemi.com Responsible Preparer: Vice President Kim Jung-young, Phone: 032-571-9100 Table of Contents [CEO Confirmation] I. Company Overview 1. Company Overview 2. Company History 3. Capital Changes 4. Total Number of Shares 5. Articles of Incorporation II. Business Content 1. Business Overview 2. Major Products and Services 3. Raw Materials and Production Facilities 4. Sales and Order Status 5. Risk Management and Derivatives 6. Major Contracts and R&D Activities 7. Other Reference Information III. Financial Matters 1. Summary Financial Information 2. Consolidated Financial Statements 3. Notes to Consolidated Financial Statements 4. Financial Statements 5. Notes to Financial Statements 6. Dividends 7. Capital Raising via Securities Issuance 7-1. Securities Issuance Capital Raising Performance 7-2. Use of Funds Raised 8. Other Financial Matters IV. Directors' Management Diagnosis and Analysis V. Auditor's Opinion 1. External Audit Matters 2. Internal Control Matters VI. Board of Directors and Company Organs 1. Board of Directors 2. Audit System 3. Shareholder Meetings VII. Shareholder Matters VIII. Officers and Employees 1. Status of Officers and Employees 2. Officer Compensation IX. Affiliated Companies X. Transactions with Major Shareholders XI. Other Investor Protection Matters 1. Disclosure Progress and Changes 2. Contingent Liabilities 3. Sanctions 4. Major Post-Balance Sheet Events XII. Detailed Tables 1. Consolidated Subsidiaries (Detail) 2. Affiliated Companies (Detail) 3. Investments in Other Entities (Detail) [Expert Confirmation] [CEO Confirmation] (CEO Confirmation image) I. Company Overview 1. Company Overview 1-1) Status of Consolidated Subsidiaries (Summary) (Unit: companies) Listed: Beginning 0, Increase 0, Decrease 0, Ending 0 Unlisted: Beginning 3, Increase 0, Decrease 0, Ending 3 Total: 3 subsidiaries, none classified as major. 1-2) Changes in Consolidated Companies New Consolidations: None Removed from Consolidation: None 2) Legal and Commercial Name - Korean: 한미반도체 주식회사 (Hanmi Semiconductor Co., Ltd.) - English: HANMI Semiconductor Co., Ltd. 3) Date of Establishment The company was established on December 24, 1980 for the purpose of manufacturing and selling semiconductor automation equipment. 4) Head Office Address, Phone, Website Address: 14, Gajwa-ro 30beon-gil, Seo-gu, Incheon (Gajwa-dong) Phone: 032-571-9100 Website: http://www.hanmisemi.com 5) SME/Venture/Mid-sized Enterprise Status Small and Medium Enterprise: Not Applicable Venture Company: Not Applicable Mid-sized Enterprise: Applicable 6) Major Business Content Hanmi Semiconductor supplies semiconductor manufacturing equipment to major global semiconductor manufacturers based on its differentiated competitiveness. Details are provided in 'II. Business Content' of this report. 7) Credit Rating Information (1) Financial Statement Reference Date: December 31, 2025 (2) Rating Date: April 21, 2026 (3) Rating Agency: NICE D&B Co., Ltd. (4) Credit Rating: AA0 (5) Valid Period: April 21, 2026 - April 20, 2027 The credit rating system of the rating agency and the meaning assigned to each rating are as follows: AAA: Highest level of commercial credit AA: Excellent commercial credit with sufficient capacity to cope with environmental changes A: Good commercial credit with significant capacity to cope with environmental changes BBB: Good commercial credit but with somewhat limited capacity to cope with environmental changes BB: Short-term commercial credit recognized but with limited capacity to cope with environmental changes B: Short-term commercial credit recognized but with insufficient capacity to cope with environmental changes CCC: Credit risk potential at current point CC: High credit risk potential at current point C: Very high credit risk with very low recovery potential D: Commercial transactions impossible or equivalent state NG: No rating - refusal of credit evaluation or insufficient data [Translation truncated]