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Aptamer Sciences Inc — Investor Relations & Filings

Ticker · 291650 ISIN · KR7291650000 KO Manufacturing
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Filings indexed 233 across all filing types
Latest filing 2026-05-21 Proxy Solicitation & In…
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
주주총회소집결의 (임시주주총회)
Proxy Solicitation & Information Statement Classification · 82% confidence The document is a formal convocation notice for an extraordinary shareholders’ meeting (date/time/location, record date, agenda items to be confirmed). It constitutes meeting materials sent to shareholders to provide information and solicit votes, matching the Proxy Solicitation & Information Statement category (PSI) rather than a report or post‐meeting result.
2026-05-21 Korean
주주명부폐쇄기간또는기준일설정
Declaration of Voting Results & Voting Rights Announcements Classification · 72% confidence The document is an official announcement of the shareholder register closure and record date for an upcoming extraordinary general meeting, i.e., setting the entitlement date for voting rights. This falls under “Voting Rights Announcements” in our Declaration of Voting Results & Voting Rights category.
2026-05-21 Korean
분기보고서 (2026.03)
Interim / Quarterly Report Classification · 96% confidence The document is titled “분기보고서 (제 16기 1분기)” covering 2026-01-01 to 2026-03-31 and includes detailed financial tables, segment disclosures, historical data, and corporate narrative. It is a comprehensive quarterly report containing actual financial statements and analysis, matching the definition of an Interim / Quarterly Report. Q1 2026
2026-05-15 Korean
주식등의대량보유상황보고서(약식)
Major Shareholding Notification Classification · 90% 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 · 95% 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 · 91% 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

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