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Sanyo Engineering & Construction Inc. 1960

Company
株式会社サンテックSanyo Engineering & Construction Inc.
Investors
6
Buys
5
Total Value
¥2.6B ($16.7M)
Avg Return
+56.05%
Last Filing
2026-05-13

Sanyo Engineering & Construction Inc. (1960) has 5 disclosed large-shareholding filings and 1 disclosed disposals on record, filed by 6 distinct investors. Together those filings cover ¥2.6B ($16.7M) in reported transaction value. The earliest filing StockDrifts holds for Sanyo Engineering & Construction Inc. is dated 2023-10-19; the most recent is 2026-05-13. 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 +56.05%, measured from each filing date to the latest available close.

Price & insider activity (12 months)

Recent filings

DateTypeSourceInsiderPurposeSharesPrice at filingReturnValue
2026-05-13BUYunknown
株式会社Sunsハウジング
strategic231.7K¥1,630-12.0%¥378M ($2.4M)
2026-05-13BUYMarket Buy
八幡 信孝
activist805.2K¥1,630-12.0%¥8M ($50K)
2026-05-13BUYunknown
八幡不動産株式会社
strategic119.8K¥1,630-12.0%¥195M ($1.3M)
2026-05-13BUYunknown
株式会社Sunsハウジング
strategic231.7K¥1,630-12.0%¥378M ($2.4M)
2026-05-13BUYMarket Buy
八幡 信孝
activist805.2K¥1,630-12.0%¥8M ($50K)
2026-05-13BUYunknown
八幡不動産株式会社
strategic119.8K¥1,630-12.0%¥195M ($1.3M)
2025-08-19BUYunknown
双栄興業株式会社
SOUEIKOUGYOU
other1.7M¥996+34.3%¥515M ($3.3M)
2025-08-19BUYunknown
双栄興業株式会社
SOUEIKOUGYOU
other1.7M¥996+34.3%¥515M ($3.3M)
2025-08-19BUYunknown
双栄興業株式会社
SOUEIKOUGYOU
other1.7M¥996+34.3%¥515M ($3.3M)
2024-07-09BUYunknown
双栄興業株式会社
SOUEIKOUGYOU KABUSIKIKAISYA
other1.2M¥754+77.5%¥883M ($5.7M)
2024-06-07BUYnegotiated
八幡 信孝
Nobutaka Yahata
activist800.2K¥751+78.2%¥601M ($3.9M)
2024-04-04SELLunknown
株式会社SBI証券
SBI SECURITIES Co.,Ltd.
other493.4K¥802-66.8%¥286M ($1.8M)
2023-10-19BUYunknown
株式会社SBI証券
SBI SECURITIES Co.,Ltd.
other850.2K¥677+97.6%¥576M ($3.7M)

Frequently asked questions

Who has been buying Sanyo Engineering & Construction Inc. stock?
6 distinct investors have filed 5 disclosed large-shareholding filings in Sanyo Engineering & Construction Inc. (1960), most recently on 2026-05-13. 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 Sanyo Engineering & Construction Inc. have?
Sanyo Engineering & Construction Inc. has 5 buy-side and 1 sell-side disclosures on record, covering ¥2.6B ($16.7M) in total reported value, spanning 2023-10-19 to 2026-05-13.
Where does StockDrifts get Sanyo Engineering & Construction Inc. 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 Sanyo Engineering & Construction Inc.. For how StockDrifts scores these disclosures, see the Japan insider signal tier research, or browse every Japanese stock we track.