NPS Cuts Stake to 3.71% from 5.00% After Market Sale

Report on Mass Holdings of Stocks, etc. (Abbreviated Form) Company: Hana Materials Report date: May 29, 2026 (Abbreviated form: Applies to reports under Article 147 of the Financial Investment Services and Capital Markets Act where the purpose is NOT to influence management control, or where the reporter is a professional investor as defined in the latter part of paragraph 1 of the same Article.) To: Financial Services Commission Date reporting obligation arose: May 29, 2026 To: Korea Exchange Report preparation reference date: May 29, 2026 Reporter: National Pension Service (NPS) === Summary === Professional investor classification (special reporting): Professional investor under Article 3-14 of the Regulations on Securities Issuance and Disclosure Issuer: Hana Materials Relationship with issuer: Shareholder Report type: Change Number and ratio of shares held: - Previous report: 989,244 shares (5.00%) - This report: 734,082 shares (3.71%) Voting rights: Not applicable (-) Reason for report: Simple additional acquisition/disposal Purpose of holding: General investment The reporter confirms that the holding status of the reporter and special related parties as of the reference date is accurately stated in accordance with relevant laws and instructions, and that there are no material misstatements or omissions. === Part 1: Overview of Report === 1. Issuer Information - Company name: Hana Materials - Company code: 166090 - Corporate classification: KOSDAQ-listed corporation - Total voting shares issued: 19,777,674 shares 2. Mass Holder Information A. Reporter (1) Reporter Overview - Report type: Change - Joint filing: Yes - Reporter classification: Pension fund / professional investor - Nationality: Republic of Korea - Name (Korean): National Pension Service (NPS) - Name (Chinese/English): 國民年金公團 (National Pension Service) - Address: 180 Giji-ro, Deokjin-gu, Jeonju-si, Jeollabuk-do Special Self-Governing Province (Manseong-dong) - Business registration number: 219-82-01593 - Occupation/business: National pension - Relationship with issuer: Shareholder - Contact: Securities Asset Management Department, Manager Kim Hyun-seo, 063-71****** (2) Detailed Reporter Information - Legal nature: Public corporation - Total assets (or AUM): 1,214,428,200,956,406 KRW - Total liabilities: 1,576,907,885,584 KRW - Total equity: 1,212,851,293,070,822 KRW - Capital: 0 - Representative: Kim Sung-ju - Decision-making body: Board of Directors B. Special Related Parties (1) Overview - No. 1: National Pension Fund — pension fund/professional investor — Other — Business reg. 219-82-01593 — Republic of Korea — 131 Ogong-ro, Deokjin-gu, Jeonju-si (Manseong-dong) — Shareholder of issuer (2) Detailed Information - Legal nature: Fund - Total assets (AUM): 1,214,428,200,956,406 KRW - Total liabilities: 1,576,907,885,584 KRW - Total equity: 1,212,851,293,070,822 KRW - Representative: - - Decision-making body: Fund Management Committee C. Collective Investment Manager: Not applicable 3. Number and Ratio of Shares Held | | Reference Date | Reporter | # Special Related Parties | Shares (#) | Ratio (%) | Common shares | Ratio (%) | Total voting shares | |--|--|--|--|--|--|--|--|--| | Previous | 2026-04-15 | NPS | 1 | 989,244 | 5.00 | 989,244 | 5.00 | 19,777,674 | | Current | 2026-05-29 | NPS | 1 | 734,082 | 3.71 | 734,082 | 3.71 | 19,777,674 | | Change | | | | -255,162 | -1.29 | -255,162 | -1.29 | 0 | 4. Reason for Change - Method of change: On-market purchase/sale - Reason for change: Simple additional acquisition/disposal === Part 2: Mass Holding Details === 1. Holdings by Security Type (Reporter and Special Related Parties) - Reporter (NPS): No direct holdings - Special related party (National Pension Fund): 734,082 common shares (3.71%) - Total voting shares issued (I): 19,777,674 - Potential shares held: 0 - Stock holding ratio: 3.71% - Common share holding ratio (A/I × 100): 3.71% 2. Holdings by Own/Customer Account (Financial Institutions Only): Not applicable === Part 3: Mass Change Details Since Previous Report === 1. Summary of Changes - Special related party (National Pension Fund): -255,162 common shares (-1.29%) 2. Detailed Change Breakdown - Holder: National Pension Fund - Date of change: May 29, 2026 - Acquisition/disposal method: - - Security type: Voting common shares - Before: 989,244 shares - Change: -255,162 shares - After: 734,082 shares - Unit price: - (omitted, as permitted for professional investors under reporting exemption) Note: Under Article 154(4) and (5)(2)-(3) of the Enforcement Decree of the Financial Investment Services and Capital Markets Act, for the State, local governments, the Bank of Korea, and professional investors subject to special reporting whose holding purpose is not to influence management control, change details may be reported in aggregate by each reporting obligation date, and acquisition/disposal method and unit price may be omitted. === Part 4: Additional Reporting for Non-Simple Investment Purposes === 1. Contracts Regarding Held Shares A. Contract status: No trust, collateral, lending, discretionary, or joint holding contracts executed or modified.