Disclosures

The company will hold one-on-one and group meetings with major overseas institutional investors on June 23, 2026 in Seoul as part of the 2026 CITIC CLSA Northeast Asia Forum, sponsored by CLSA Securities. Key talking points include entry into the AI system semiconductor market (foundry, OSAT) via the launch of 2.5D Package TC Bonders (40/120), supply of new HBF (High Bandwidth Flash) TC Bonders to customers in response to expanding AI memory demand, and expansion into the US semiconductor market including TeraFab to address AI and aerospace packaging equipment demand. The agenda signals continued diversification of the TC Bonder product portfolio beyond HBM into adjacent high-growth packaging niches. The schedule is subject to change.

Outside director Han Chan-sik voluntarily resigned on June 21, 2026, citing personal reasons. He was originally appointed in March 2023 and most recently reappointed in March 2026 for a three-year term. Following his departure, the board shrinks from 5 to 4 registered directors, and outside directors drop from 3 to 2, reducing the outside director ratio from 60% to 50%. As a large-scale corporation, the company is required to maintain a majority of outside directors, so the 50% ratio brings governance compliance into a narrower margin pending a replacement.

The largest shareholder, Lee Sang-ryul, and related parties increased their combined holdings from 7,938,704 shares (54.20%) to 7,998,894 shares (54.61%), an increase of 60,190 shares (+0.41pp). Voting-right shares rose from 5,543,093 (45.24%) to 5,603,283 (45.73%). The stated purpose is to influence management control, with stock price stabilization and enhancing shareholder value cited as the rationale. The reporting party explicitly affirms substantive influence over board appointments, capital actions, dividends, and M&A. The 14-member special-related-party group includes family members, executives, and affiliates Cheonbo Precision and Solique Investment.

CEO and 10%+ shareholder Lee Sang-ryul reported acquiring 39,720 common shares of Cheonbo via on-market purchases on June 19, 2026, lifting his direct stake from 3,300,000 to 3,339,720 shares. Purchase prices ranged approximately KRW 42,500-43,700 per share, suggesting roughly KRW 1.7 billion deployed. Including convertible/warrant-linked instruments (958,244 units), his total beneficial holding rose to 4,297,964 securities. However, his ownership ratio fell to 27.26% (common stock) and 29.34% (including derivatives) from 33.00%/34.35% previously, reflecting share count dilution since the prior November 2024 report. Insider buying by the founder-CEO at current price levels is typically read as a confidence signal.

Major shareholder LAPIS Semiconductor (Japan), holding 15.16% of the company, filed a trading plan to dispose of 1,547,367 subscription rights certificates (신주인수권증서) from the ongoing rights offering. The off-market sale is scheduled between July 20-23, 2026, with an indicative price of KRW 4,125 per certificate, totaling approximately KRW 6.38 billion. The actual price will be determined by the 5-day arithmetic mean closing price during the warrant listing period (July 10-16, 2026). After completion, LAPIS will retain its 7,489,645 common shares (12.89% stake) but forgo participation in the rights offering, signaling it does not intend to inject additional capital.

Holders of the company's 5th unregistered private exchangeable bond exercised exchange rights for KRW 2.3 billion across three dates (May 14, May 26, and June 19, 2026) at an exchange price of KRW 16,047 per share. The cumulative exchanged shares total 143,327, equal to 1.11% of total shares outstanding. All delivered shares come from treasury stock held at the Korea Securities Depository, so there is no new share issuance or direct dilution. Remaining unexchanged bond balance stands at KRW 6.0 billion, equivalent to a potential 373,901 additional shares if fully exercised.

Kim Jae-hong, a non-registered executive (Vice President) in the MX Support Team, reported a change in his beneficial ownership of company securities. On June 15, 2026, he sold 410 common shares on the open market at 336,000 won per share, reducing his holdings from 552 shares to 142 shares. His total reported holdings (including the previously held 2,400 securities) moved from 2,400 to 1,990 units, still representing essentially 0.00% of the 6.65 billion shares outstanding. Given the trivial size relative to the company's float, the transaction is not financially material but is disclosed under insider reporting rules.

This is an amendment to a previously disclosed single supply contract for the Maseokwoori 2 Regional Housing Association apartment construction and infrastructure project. The contract end date has been revised from April 17, 2030 to July 18, 2030, reflecting an approximately three-month extension. The original disclosure (March 18, 2026) noted the end date was tentative because the actual construction start date had not been confirmed; the amendment now appears to lock in the 49-month timeline from a confirmed start. The contract value remains 155.6 billion KRW (12.91% of 2024 revenue), and no change to scope or counterparty was disclosed.

Non-executive director Koo Bon-cheon filed a pre-trade disclosure to sell 919,950 new share subscription rights certificates via off-market transaction between July 20-23, 2026. The estimated transaction value is approximately KRW 3.79 billion based on the indicative price of KRW 4,125 per certificate, though the actual price will be determined by the 5-day average closing price during the rights certificates' listing period (July 10-16, 2026). After the sale, the reporter's holdings will decrease from 9.11% to 7.67%, representing only the underlying common shares (4,452,789 shares). The rights certificates are being issued in connection with an ongoing rights offering with general public subscription for forfeited shares. This represents an insider choosing not to exercise subscription rights in the capital raise, which can signal personal liquidity needs but does not reduce the insider's underlying equity stake.

Director Koo Bon-wan, a non-standing board member, plans to dispose of 659,024 preemptive rights certificates via off-market sale between July 20 and July 23, 2026. The estimated transaction value is approximately KRW 2.72 billion, based on a provisional unit price of KRW 4,125 (the first issue price of the ongoing rights offering); the actual price will be determined as the 5-day arithmetic average of closing prices during the rights certificate listing period (July 10-16, 2026). The reporter is choosing to sell the rights certificates rather than subscribe to new shares in the company's rights offering. After the transaction, the director's ownership will decline from 6.55% (3,848,866 securities) to 5.49% (3,189,842 common shares), reflecting the disposal of the rights but retention of underlying common stock.