Major Shareholder LB Corp Plans KRW 9.37B Rights Offering Subscription via OTC Warrant Purchase — LB Semicon

Summary

LB Corp, the de facto controlling shareholder, filed a trading plan to purchase 2,271,295 subscription warrants (신주인수권증서) through off-exchange (OTC) acquisition between July 20-23, 2026, at an indicative price of KRW 4,125 per share, totaling approximately KRW 9.37 billion. The purpose is to participate in the rights offering (shareholder allocation plus public offering of forfeited shares). Following completion, LB Corp's holdings (common shares + warrants) would rise from 5,823,200 shares (9.86%) to 8,094,495 shares (13.19%) of the issued share count. The actual price will be determined by the 5-business-day average closing price during warrant trading (July 10-16, 2026) and may differ from the indicative figure; actual transaction size can vary within ±30% per regulation.

Historical Impact

3 past Insider Ownership Change · ≈ Form 4 events at LB Semicon

Median +5d

-19.25%

Range

-19.47% to -19.25%

Positive outcomes

0/3

Filed	P₀	P₊₅	+5d
Jun 19, 2026	₩5,110	₩4,115	-19.47%
Jun 18, 2026	₩5,300	₩4,280	-19.25%

Full Translation

Report on Trading Plan of Specified Securities by Executives and Major Shareholders (v6.0) LB Semicon Co., Ltd. Report on Trading Plan of Specified Securities by Executives and Major Shareholders To: Securities and Futures Commission To: Korea Exchange Trading start date (settlement date): July 20, 2026 Reporting obligation arising date: June 19, 2026 Report preparation reference date: June 17, 2026 * The reporter certifies that, as of the report preparation reference date, the trading plan for specified securities was prepared accurately in accordance with relevant laws and instructions, with no false statements or omissions of material matters. Reporter: LB Co., Ltd. 1. Information on Issuing Company - Company name: LB Semicon Co., Ltd. - Corporate classification: KOSDAQ-listed corporation - Company code: 061970 - Total issued shares: 58,083,006 2. Information on Reporter - Reporter category: Domestic corporation - Name (Korean): 주식회사 엘비 - Name (English): LB Corp - Business registration number: 120-87-62897 - Address: 12F, 512 Teheran-ro, Gangnam-gu, Seoul (Daechi-dong, Shinan Bldg.) - Relationship with issuer: Major shareholder, de facto controlling shareholder (not a registered executive) - Business contact: Jisoo Lee, Deputy General Manager, Finance Office, LB Co., Ltd. — Tel: 02-3467-0528, Fax: 02-3467-0543, Email: jslee@lb-holdings.com 3. Ownership and Trading Plan of Specified Securities A. Ownership status at time of trading plan submission, by type of specified securities: - Common shares: 4,826,120 - Warrants (subscription rights certificates): 997,080 - CB / BW / participating bonds / EB / DR / Other: none - Total: 5,823,200 shares (9.86%) - Total issued shares (J): 58,083,006 - Non-common-share specified securities (I): 997,080 - Ownership ratio of specified securities [(A+I)/(J+I-(F+G+H))] × 100 = 9.86% - Common share ownership ratio (A/J) × 100 = 8.31% B. Detailed transaction history for the 6 months prior to trading start date: None. C. Trading Plan (1) Purpose: Off-exchange purchase of subscription warrants in order for the reporter to participate in the public offering of forfeited shares following the shareholder allocation rights offering. (2) Trading volume and amount: - Trading start date (settlement): July 20, 2026 - Trading end date (settlement): July 23, 2026 - Trading period: 4 days - Method: Off-exchange purchase (+) - Type: Subscription warrants (신주인수권증서) - Number of specified securities: 2,271,295 shares - Acquisition/disposal unit price: KRW 4,125 - Trading amount: KRW 9,369,091,875 - Note: Per the disclosure form, the unit price is shown as the first issue price of the rights offering with public offering of forfeited shares. The actual final issue price will be confirmed three trading days before the first day of the existing shareholder subscription. The actual acquisition/disposal price will be determined as the arithmetic average of the closing prices over 5 business days of the warrant listing trading period (July 10–16, 2026), and may differ from the price shown in this disclosure. (3) Basis for unit price calculation: The unit price is shown as the first issue price of the rights offering with public offering of forfeited shares per disclosure form requirements. The actual price will be set as the 5-business-day arithmetic average of closing prices during the warrant listing trading period (July 10–16, 2026) and is not yet known. (4) Contracts related to planned trading of specified securities: None. D. Assessment of trading scale: - 6-month prior trading: none - Trading plan: 2,271,295 warrants @ KRW 4,125 = KRW 9,369,091,875 - Total: 2,271,295 shares / KRW 9,369,091,875 - Total issued shares (J): 58,083,006 - Number of traded specified securities (P): 2,271,295 - Trading ratio of specified securities (P/(J+P)) × 100 = 3.76% E. Expected ownership status by type of specified securities after completion of trading plan: - Common shares: 4,826,120 - Warrants: 3,268,375 - Other types: none - Total: 8,094,495 shares (13.19%) - Total issued shares (J): 58,083,006 - Non-common-share specified securities (I): 3,268,375 - Ownership ratio of specified securities = 13.19% - Common share ownership ratio = 8.31% Note: Pursuant to Article 173-3(3) of the FSCMA, the reporter may execute trades that differ from the plan within a range of 70%–130% of the trading amount (unit price × quantity), so the actual unit price and quantity may vary.