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ATUM CO., LTD. — Investor Relations & Filings

Ticker · 355690 ISIN · KR7355690009 KO Professional, scientific and technical activities
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Filings indexed 137 across all filing types
Latest filing 2026-06-05 Major Shareholding Noti…
Country KR South Korea
Listing KO 355690

About ATUM CO., LTD.

https://www.atum.bio/

ATUM is an integrated biologics development partner offering a comprehensive suite of services, from virtual DNA sequence to research cell bank. The company's core activities include gene design and synthesis, protein expression and analytics, cell line development, and antibody and protein engineering. Utilizing expertise in machine learning and proprietary platforms like DNA2GO for gene fragments and the lightningHEK and discoCHO expression systems, ATUM facilitates the discovery and optimization processes for its clients. The company operates as a collaborative, one-stop partner for biological engineering projects, providing fully in-house services.

Recent filings

Filing Released Lang Actions
주식등의대량보유상황보고서(약식)
Major Shareholding Notification Classification · 90% confidence The document is a “주식등의 대량보유상황보고서(약식)” – an institutional investor’s report of changes in large shareholdings under the Korean Capital Markets Act. It details the number and percentage of holdings before and after, reasons for change, and transaction-level information. This clearly matches a Major Shareholding Notification. No other category (e.g., share issue, director dealing, earnings release) fits.
2026-06-05 Korean
전환가액의조정 (제5회차, 제6회차)
Capital/Financing Update Classification · 92% confidence The document is a corporate disclosure detailing adjustments to the conversion price of outstanding convertible bonds (5th and 6th tranches), including formulas, pre- and post-adjustment prices, conversion share counts, adjustment reasons, and application dates. This falls under a financing activity and capital structure update rather than a regulatory notice of a report or share issuance proxy. Therefore it best matches Capital/Financing Update (CAP).
2026-05-27 Korean
분기보고서 (2026.03)
Interim / Quarterly Report Classification · 95% confidence The document is titled “분기보고서” (Quarterly Report) covering the period 2026-01-01 to 2026-03-31, includes detailed sections such as company overview, subsidiary information, capital changes, share data, bylaws, and extensive business descriptions. It is a full interim/quarterly report, not merely an announcement or summary. This matches the definition of an Interim / Quarterly Report (Code: IR). Q1 2026
2026-05-15 Korean
임원ㆍ주요주주특정증권등소유상황보고서
Director's Dealing Classification · 87% confidence The document is a formal reporting of an executive’s and major shareholder’s ownership and changes in certain securities (insider holdings, allocations, disposals of warrants and shares). This directly matches an insider trading/Director’s Dealing report. Therefore it is classified as DIRS.
2026-05-12 Korean
주식등의대량보유상황보고서(일반)
Major Shareholding Notification Classification · 94% confidence The document is a statutory "주식등의 대량보유상황보고서" (Large Shareholding Report) filed with the financial regulator and stock exchange, detailing the number of shares held by a major shareholder and related parties, changes in ownership percentages, purpose of acquisition, and transaction history. This matches the definition of a Major Shareholding Notification (crossing significant thresholds).
2026-05-12 Korean
증권발행실적보고서
Capital/Financing Update Classification · 95% confidence The document is titled '증권발행실적보고서' which translates to 'Securities Issuance Performance Report'. It details a capital increase through a rights offering and general public subscription, including issuance amount, subscription and allocation schedules, underwriters, major shareholders' shareholding changes before and after the capital increase, and detailed use of proceeds including facility investment, debt repayment, and operating funds. It also includes detailed information on convertible bonds and short-term borrowings related to the capital increase. The document is comprehensive and contains substantive financial data and analysis related to the capital raising activity. This matches the definition of a Capital/Financing Update (CAP), which covers updates on company fundraising and capital structure changes. It is not an announcement of a report, nor a full annual or interim report, but a detailed report on a financing event. Therefore, the correct classification is CAP with high confidence.
2026-04-30 Korean

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