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TSU — Investor Relations & Filings

Ticker · 6581 ISIN · TW0006581002 TW Water supply; sewerage, waste management and remediation activities
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Filings indexed 30 across all filing types
Latest filing 2026-05-05 Regulatory Filings
Country TW Taiwan
Listing TW 6581

About TSU

https://www.tsutw.com.tw/

Taiwan Steel Union Co., Ltd. (TSU) is a resource recycling enterprise dedicated to the circular economy through "urban mining" and advanced smelting technologies. The company specializes in the treatment of electric arc furnace (EAF) dust and various zinc-containing industrial wastes. Utilizing high-temperature Waelz kiln processes and waste heat recovery, TSU transforms hazardous by-products into valuable resources, primarily crude zinc oxide. It holds the distinction of being the first hazardous waste recycling organization to obtain UL2809 verification for recycled material content. Beyond zinc recovery, the company has expanded its capabilities to process diverse industrial waste streams, converting them into renewable construction materials. With over three decades of operational expertise, TSU provides technical solutions that address waste disposal challenges while promoting resource sustainability and carbon emission reduction.

Recent filings

Filing Released Lang Actions
115年04月內部人持股異動(事後)
Regulatory Filings Classification · 100% confidence The document text indicates an error message stating that the page cannot be accessed due to security reasons. There is no content related to any financial report, announcement, or filing. The text is very short (386 characters) and contains no information about company filings, reports, or announcements. Therefore, it does not fit any specific filing category and should be classified as a Regulatory Filing (RNS) as a fallback category for miscellaneous filings that do not fit elsewhere.
2026-05-05 Chinese
115年04月董事會成員及持股
Director's Dealing Classification · 95% confidence The document is a detailed tabulation of shareholdings and pledged shares by insiders, including directors, managers, and major shareholders of the company. It lists share counts, pledged shares, and relationships of insiders. The content focuses on insider shareholdings and pledges rather than financial results, management changes, or meeting materials. There is no indication of a report or announcement of voting results, nor is it a certification or legal proceeding. The document is a typical insider shareholding disclosure, which corresponds to Director's Dealing filings that report personal share transactions or holdings by company directors and executives. The document length is 3815 characters, which is consistent with a detailed insider shareholding report rather than a brief announcement. Therefore, the best fitting classification is Director's Dealing (DIRS).
2026-05-05 Chinese
115年04月法人說明會簡報 — 658120260429E001.pdf
Investor Presentation Classification · 95% confidence The document is a slide deck for the “2026Q1 Earning Conference” prepared by the Deputy General Manager, showing detailed business overview, technical processes, sustainability, Q1 financial performance (revenue, net income, segment analysis), forecasts, and outlook. It is clearly an investor presentation, not a regulatory report, earnings press release, or transcript. Therefore it fits the Investor Presentation category (IP).
2026-04-29 English
115年04月法人說明會簡報 — 658120260429M001.pdf
Investor Presentation Classification · 95% confidence The document is titled '2026年第1季法人說明會' which translates to '2026 Q1 Institutional Investor Presentation'. It contains detailed financial data for Q1 2026, including revenue, profit, sales volume, and operational outlook. The content includes charts, business segment descriptions, market analysis, and future business prospects. The document is about 12,593 characters long, which is substantial and contains substantive financial and operational information. It is presented by a company officer and is clearly a presentation aimed at investors explaining quarterly results and business outlook. This matches the definition of an Investor Presentation (IP) rather than an Earnings Release (ER) which would be shorter and more summary-focused, or an Interim Report (IR) which would be a formal financial report with full financial statements. There is no indication that this is a regulatory filing, certification, or announcement of a report publication. Therefore, the best classification is Investor Presentation (IP).
2026-04-29 Chinese
115年04月法人說明會簡報
Investor Presentation Classification · 87% confidence The document is a schedule/listing of “法人說明會” (institutional investor briefings) including dates, times, locations, PDF presentation links, and webcast URLs. This aligns with Investor Presentation materials provided to investors rather than a formal earnings release or regulatory filing. Therefore, the appropriate classification is Investor Presentation (IP).
2026-04-29 Chinese
115年第1季財務報告書 — 202601_6581_AI1.pdf
Interim / Quarterly Report Classification · 100% confidence The document is a consolidated financial report for Taiwan Steel Union Co., Ltd. and its subsidiaries for the first quarter of the years 115 and 114 (Taiwanese calendar years). It includes a CPA review report, consolidated balance sheets, income statements, statements of changes in equity, cash flow statements, and detailed notes on accounting policies and company information. The presence of a CPA review report and the reference to IFRS 34 "Interim Financial Reporting" indicates this is a quarterly or interim financial report. The document contains substantive financial data and analysis for a period shorter than a full fiscal year, consistent with an Interim / Quarterly Report. It is not an announcement or a certification letter but the actual financial report itself. Therefore, the correct classification is Interim / Quarterly Report (IR).
2026-04-28 Chinese

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