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Sanko Sangyo Co.,Ltd. 7922

Company
三光産業株式会社Sanko Sangyo Co.,Ltd.
Investors
5
Buys
5
Total Value
¥4.6B ($29.5M)
Avg Return
+28.23%
Last Filing
2026-04-28

Sanko Sangyo Co.,Ltd. (7922) has 5 disclosed large-shareholding filings and 3 disclosed disposals on record, filed by 5 distinct investors. Together those filings cover ¥4.6B ($29.5M) in reported transaction value. The earliest filing StockDrifts holds for Sanko Sangyo Co.,Ltd. is dated 2021-06-28; the most recent is 2026-04-28. All of it is parsed from EDINET large-shareholding (5%+) reports, the official disclosure system operated by the Financial Services Agency (Japan). Across these filings the average return since disclosure is +28.23%, measured from each filing date to the latest available close.

Price & insider activity (12 months)

Recent filings

DateTypeSourceInsiderPurposeSharesPrice at filingReturnValue
2026-04-28SELLunknown
株式会社エス・ワイ・エス
SYS INC.
unknown0¥717-0.4%¥610M ($3.9M)
2026-04-27BUYunknown
鮫島 英子
activist190.3K¥717+0.4%¥136M ($880K)
2026-04-27BUYunknown
株式会社バロン
activist5.4M¥717+0.4%¥3.9B ($24.9M)
2026-04-17SELLunknown
三光産業取引先持株会 理事長 吉田 純一
Yoshida Junichi
unknown0¥718-0.1%¥337M ($2.2M)
2026-04-16BUYunknown
鮫島 英子
activist190.3K¥717+0.3%¥136M ($880K)
2026-04-16BUYunknown
株式会社バロン
activist5.4M¥717+0.3%¥3.9B ($24.9M)
2026-04-16BUYunknown
株式会社バロン
BARON Co.,Ltd.
activist5.4M¥717+0.3%¥3.9B ($24.9M)
2026-03-31SELLunknown
三光産業取引先持株会 理事長 吉田 純一
Yoshida Junichi
activist469.7K¥768+6.6%¥2M ($16K)
2026-03-26BUYnegotiated
株式会社エス・ワイ・エス
SYS INC.
strategic851.0K¥756-5.0%¥643M ($4.2M)
2026-02-09BUYnegotiated
株式会社エス・ワイ・エス
SYS INC.
strategic851.0K¥765-6.1%¥651M ($4.2M)
2024-02-14BUYnegotiated
株式会社エツミ光学
ETSUMI OPTICAL Co.,LTD.
strategic500.0K¥421+70.5%¥211M ($1.4M)
2024-02-14BUYnegotiated
株式会社エツミ光学
ETSUMI OPTICAL Co.,LTD.
strategic500.0K¥421+70.5%¥211M ($1.4M)
2024-02-09BUYnegotiated
株式会社エス・ワイ・エス
SYS INC.
strategic851.0K¥423+69.7%¥360M ($2.3M)
2021-06-28BUYunknown
三光産業取引先持株会 理事長 吉田 弘
Yoshida Hiroshi
strategic442.8K¥379+89.5%¥168M ($1.1M)

Frequently asked questions

Who has been buying Sanko Sangyo Co.,Ltd. stock?
5 distinct investors have filed 5 disclosed large-shareholding filings in Sanko Sangyo Co.,Ltd. (7922), most recently on 2026-04-28. Each filer, their role, the number of shares and the price at filing are listed in the table on this page.
How many insider filings does Sanko Sangyo Co.,Ltd. have?
Sanko Sangyo Co.,Ltd. has 5 buy-side and 3 sell-side disclosures on record, covering ¥4.6B ($29.5M) in total reported value, spanning 2021-06-28 to 2026-04-28.
Where does StockDrifts get Sanko Sangyo Co.,Ltd. insider data?
From EDINET large-shareholding (5%+) reports — the official filing system run by the Financial Services Agency (Japan). StockDrifts parses each disclosure and matches it to daily price history; the original filings remain available directly from EDINET.
Do insider buys in Japanese stocks predict returns?
Not uniformly. StockDrifts scored 101,000+ Japanese large-shareholding filings on fixed 12-month forward returns and found the predictive power concentrated in specific filer types and filing patterns rather than spread evenly across all disclosures.

Source filings

Every trade listed above is disclosed in EDINET large-shareholding (5%+) reports, filed with the Financial Services Agency (Japan). View the original EDINET filings for Sanko Sangyo Co.,Ltd.. For how StockDrifts scores these disclosures, see the Japan insider signal tier research, or browse every Japanese stock we track.