Q1 2026 Revised Related-Party Transactions with Samsung C&T

Change in Goods and Service Transactions with Affiliates Invested by the Same Person Business Group: Samsung Company Name: Samsung Electronics Co., Ltd. Disclosure Date: 2026.05.15 Related Regulation: Article 26 of the Fair Trade Act (Unit: KRW million) 1. Revenue of the Relevant Company for the Immediately Preceding Fiscal Year (A): 238,043,009 2. Transaction Period: Q1 2026 (2026.01.01 ~ 2026.03.31) 3. Date of Board Resolution: - Outside Director Attendance: Attended (persons): - Auditor (Audit Committee Member) Attendance: -; Absent (persons): - 4. Transaction Amounts of Goods/Services with Same-Person-Invested Affiliates Counterparty: Samsung C&T Corporation - Sales (B): 736 - Purchases (C): 728,253 - Total (D = B + C): 728,989 - Ratio to Revenue (D/A, %): 0.31 5. Details of Goods/Service Transactions (Purchases from Samsung C&T; all under "externally secured loan, etc." terms) - Other sales — Other — Negotiated contract: 28 - Other sales — Other — Competitive bid: 0.5 - Other sales — Other — Negotiated contract: 708 - Plant construction work — Construction, etc. — Negotiated contract: 1,768 - Plant construction work — Construction, etc. — Negotiated contract: 5,000 - Plant construction work — Construction, etc. — Negotiated contract: 573,000 - Plant construction work — Construction, etc. — Negotiated contract: 40,000 - Plant construction work — Construction, etc. — Negotiated contract: 80,860 - Goods purchase — Other — Competitive bid: 3,559 - Plant construction work — Construction, etc. — Negotiated contract: 1,500 - Plant construction work — Construction, etc. — Negotiated contract: 633 - Plant construction work — Construction, etc. — Negotiated contract: 467 - Goods purchase — Other — Competitive bid: 3,217 - Landscape management — Landscape mgmt, etc. — Competitive bid: 3,650 - Goods purchase — Other — Competitive bid: 5 - Goods purchase — Other — Competitive bid: 1,773 - Other purchases — Other — Negotiated contract: 846 - Landscape management — Landscape mgmt, etc. — Competitive bid: 3,605 - Goods purchase — Other — Competitive bid: 982 - Other purchases — Other — Negotiated contract: 2,557 - Goods purchase — Other — Competitive bid: 5 - Landscape management — Landscape mgmt, etc. — Competitive bid: 224 - Other purchases — Other — Negotiated contract: 0.3 - Goods purchase — Other — Competitive bid: 1 - Goods purchase — Other — Competitive bid: 12 - Landscape management — Landscape mgmt, etc. — Competitive bid: 553 - Landscape management — Landscape mgmt, etc. — Competitive bid: 188 - Other purchases — Other — Negotiated contract: 1 - Other purchases — Other — Negotiated contract: 2 - Other purchases — Other — Negotiated contract: 165 - Other purchases — Other — Negotiated contract: 11 - Other purchases — Other — Negotiated contract: 3,179 - Other purchases — Other — Negotiated contract: 250 - Other purchases — Other — Negotiated contract: 240 6. Bulk Disclosure by Contract Method (per Disclosure Regulation Article 9-2 (4)): Competitive bid / Limited competitive bid / Designated competitive bid / Negotiated contract — no aggregate figures provided. 7. Related Disclosure Date: 2025.11.28 8. Other: Reflects changes versus the originally disclosed Q1 2026 transaction plan.