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Aptamer Sciences Inc — Investor Relations & Filings

Ticker · 291650 ISIN · KR7291650000 KO Manufacturing
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Filings indexed 230 across all filing types
Latest filing 2026-04-22 Major Shareholding Noti…
Country KR South Korea
Listing KO 291650

About Aptamer Sciences Inc

https://aptsci.com/en/

Aptamer Sciences Inc. is a clinical-stage biopharmaceutical company specializing in aptamer technology. The company has established a proprietary, integrated platform for the discovery and development of aptamer-based therapeutics and diagnostics. Its primary focus is on oncology, utilizing its Aptamer-Drug Conjugate (ApDC™) platform to create targeted cancer treatments. The lead candidate, AST-201, is an ApDC targeting the GPC3 protein, which is highly expressed in solid tumors such as liver cancer. The company is advancing AST-201 through clinical trials to evaluate its safety and efficacy. The development pipeline also includes other innovative platforms like Aptamer Radioligand Conjugates (ApRC) and Aptamer Immune Stimulator Conjugates (ApIS), aimed at addressing unmet medical needs in hemato-oncology and other areas. Aptamer Sciences leverages its technology to develop novel therapies with the potential for high specificity and efficacy.

Recent filings

Filing Released Lang Actions
주식등의대량보유상황보고서(약식)
Major Shareholding Notification Classification · 1% confidence The document is a Korean “주식등의 대량보유상황보고서(약식)” which translates to a Large Shareholding Status Report (abbreviated) filed under the Capital Markets Act. It details the number and percentage of shares held and the changes due to a third‐party allotment capital increase. This exactly matches the definition of a Major Shareholding Notification (MRQ).
2026-04-22 Korean
주식등의대량보유상황보고서(약식)
Major Shareholding Notification Classification · 1% confidence The document is a Korean-language “주식등의 대량보유상황보고서(약식)” — a report on large shareholdings status under capital markets law, detailing the number of shares held, ownership percentage changes, acquisition method, and reporting thresholds. This matches the definition of a Major Shareholding Notification (MRQ).
2026-04-17 Korean
임원ㆍ주요주주특정증권등소유상황보고서
Director's Dealing Classification · 1% confidence The document is a statutory report disclosing an executive/major shareholder’s ownership and recent transactions in the company’s securities (tables of share counts, acquisition dates, insider details). This matches the definition of a Director’s Dealing (insider trading) report.
2026-04-17 Korean
증권발행결과(자율공시)
Share Issue/Capital Change Classification · 1% confidence The document is a voluntary disclosure titled “증권 발행결과(자율공시)” which details the issuance of new shares (number of shares, amount, subscription method, issuance date, listing plans), and includes related prior issuance decisions. This is a direct announcement of a share issue/capital change, matching the Share Issue/Capital Change category (Code: SHA).
2026-04-14 Korean
증권발행결과(자율공시)
Share Issue/Capital Change Classification · 1% confidence The document is a voluntary disclosure detailing the results of a paid-in capital increase via third-party allotment (12,000,000 shares issued, amount, subscription date, listing plan). This is an announcement of a share issuance and capital change, matching the definition for Share Issue/Capital Change (SHA).
2026-04-09 Korean
[기재정정]주요사항보고서(유상증자결정)
Share Issue/Capital Change Classification · 1% confidence The document is a Korean ‘Major Event Report’ (주요사항보고서) concerning a paid-in capital increase (유상증자) via third-party allotment, including corrected deposit dates, listing dates, allottee information, subscription terms, and capital usage. It is a substantive filing announcing a new share issue and capital change, matching the ‘Share Issue/Capital Change’ category.
2026-04-06 Korean

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