Disclosures

Amkor filed an 8-K under Item 5.07 reporting the outcome of shareholder votes from its annual meeting, typically covering director elections, auditor ratification, and routine governance proposals. Full filing body not analyzed; description inferred from form + item codes. Low PM relevance absent an unusual say-on-pay rejection or contested board outcome.

Park Systems has announced an in-person Investor Relations Day to be held on May 29, 2026, from 15:00 to 16:30 KST at its headquarters in Gwacheon, Gyeonggi-do. The event is open exclusively to domestic investors who pre-register via the provided Google Forms link, with registration closing on May 21 at 18:00. Management will present updates on business performance and outlook, followed by a Q&A session. IR materials will be posted on the Korea Exchange disclosure platform (KRX KIND) on May 28, one day prior to the event. This is a routine transparency-focused engagement with no indication of extraordinary announcements.

Hana Micron Inc., the largest shareholder of Hana Materials, filed an amended large shareholding report triggered by a modification to its stock-backed loan agreement. Total shares held remain unchanged at 8,962,208 shares (44.87% of voting shares). The material change is a reduction in shares subject to the major contract (pledged shares) from 5,091,254 (25.49%) to 4,924,241 (24.66%), a decrease of 167,013 shares. This likely reflects a partial reduction in collateral scope, possibly due to partial loan repayment or restructured pledge terms. There is no change in overall shareholding or corporate governance posture.

Chairman and controlling shareholder Kwak Dong Shin has filed a mandatory trading plan disclosing his intent to purchase 25,240 common shares on June 18, 2026, at ₩317,000 per share (based on the prior day's KRX closing price), for a total of approximately ₩8.0 billion. The stated purpose is to enhance corporate value through direct personal acquisition of company shares. This planned purchase follows three open-market buys over the preceding six months totaling 98,394 shares for approximately ₩14.2 billion, indicating a sustained pattern of insider accumulation. Upon execution, the chairman's stake will increase marginally from 33.57% to 33.60% of total issued shares. Under Korean securities law, the actual transaction size may vary within 70–130% of the disclosed transaction amount.

Techwing has signed a supply contract worth ₩9.72 billion (approx. $7.0M USD) to deliver HBM inspection equipment to Samsung Electronics. The contract represents 6.11% of the company's 2025 consolidated annual revenue of approximately ₩159.1 billion. Delivery is scheduled to begin partially on June 1, 2026, with final delivery completed by July 12, 2026. Payment terms are structured as 90% within 30 days of delivery and 10% within 30 days of customer approval, with the contract formally closing by August 13, 2026. The deal underscores continued demand from Samsung for HBM-related testing infrastructure, consistent with prior-year supply relationships.

Park Young Jun, CEO and de facto controlling shareholder of the company, purchased 3,123 common shares on the open market on May 19, 2026, at a price of 7,433 KRW per share. His total holdings rose from 3,265,347 shares (22.54%) to 3,268,470 shares (22.56%), an increase of 0.02 percentage points. No convertible bonds, warrants, or other equity-linked instruments were involved; the holding consists entirely of ordinary shares. While CEO open-market buying is generally interpreted as a positive signal of management's confidence in the company's outlook, the transaction size is small relative to the total shares outstanding of approximately 14.49 million.

The largest shareholder, Hana Micron, amended its previously disclosed stock pledge agreement that could trigger a change in control if fully executed. Key changes include extending Contract #1 (NH Investment & Securities) by six months to November 16, 2026, and replacing Contract #2 with a new KB Securities pledge that reduces pledged shares from 423,819 to 256,806 while keeping the KRW 10 billion collateral amount unchanged. Total shares that would transfer if all pledges are executed rose slightly to 1,462,495 (7.39% stake), while cumulative pledged shares decreased to 4,966,013. The underlying credit support for Hana Micron Vina's USD 200 million loan was also restructured, switching lenders from KDB/Eximbank to Citibank N.A. and others, with Hana Materials' guarantee reduced from USD 240 million to USD 200 million. Overall, this is a routine refinancing/extension rather than new borrowing.

ISC filed a correction to its semi-annual subcontract payment disclosure for H2 2025 (Jul 1 - Dec 31, 2025), originally submitted on Feb 12, 2026. The only fix is a typo: the 'paid within 10 days' amount was shown as '27,542,' (with a trailing comma) and is corrected to '27,542' (thousand KRW). All substantive figures remain unchanged: total subcontract payments of KRW 30.54 billion, 100% paid in cash, with 93.42% settled within 10-15 days. The filing also reflects the absorption merger of subsidiary I-Semi into ISC. No dispute resolution body has been established.