A Central Index Key (CIK) is a unique identifier assigned by the SEC to each filer.

Why are some filings missing?

New filings appear as the SEC updates EDGAR, and older records can vary by availability.

How often is this page updated?

Updates follow new EDGAR submissions and periodic data refreshes.

SEC EDGAR filings, ownership reports, and insider transactions for Son Masayoshi.

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Son Masayoshi has filed 6 SEC EDGAR filings since 10 Jul 1998

Recent SEC filings for Son Masayoshi including 3, 4.

Form type	Document	Filing	Description	Filing date	Reporting date	File number(s)
3	Open 3 document	View SEC filing for 3	FORM 3	18 Mar 2026	18 Mar 2026	001-41800
3	Open 3 document	View SEC filing for 3	FORM 3 SUBMISSION	12 Jul 2013	10 Jul 2013	001-04721

Son Masayoshi files with the SEC under CIK 0001065520. This page aggregates EDGAR filings and related ownership activity.

What is a CIK?: A Central Index Key (CIK) is a unique identifier assigned by the SEC to each filer.
Why are some filings missing?: New filings appear as the SEC updates EDGAR, and older records can vary by availability.
How often is this page updated?: Updates follow new EDGAR submissions and periodic data refreshes.