Who has been buying Sanwayuka Industry Corporation stock?

7 distinct investors have filed 31 disclosed large-shareholding filings in Sanwayuka Industry Corporation (4125), most recently on 2026-03-03. 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 Sanwayuka Industry Corporation have?

Sanwayuka Industry Corporation has 31 buy-side and 19 sell-side disclosures on record, covering ¥26.3B ($169.5M) in total reported value, spanning 2021-12-27 to 2026-03-03.

Where does StockDrifts get Sanwayuka Industry Corporation 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.

Sanwayuka Industry Corporation 4125

Company

三和油化工業株式会社Sanwayuka Industry Corporation

Investors

Buys

Total Value

¥26.3B ($169.5M)

Avg Return

+2.52%

Last Filing

2026-03-03

Sanwayuka Industry Corporation (4125) has 31 disclosed large-shareholding filings and 19 disclosed disposals on record, filed by 7 distinct investors. Together those filings cover ¥26.3B ($169.5M) in reported transaction value. The earliest filing StockDrifts holds for Sanwayuka Industry Corporation is dated 2021-12-27; the most recent is 2026-03-03. 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 +2.52%, measured from each filing date to the latest available close.

Price & insider activity (12 months)

Recent filings

Date	Type	Source	Insider	Purpose	Shares	Price at filing	Return	Value
2026-03-03	BUY	unknown	有限会社エムエムエス	strategic	900.0K	¥3,195	-2.2%	¥2.9B ($19.0M)
2026-03-03	BUY	unknown	柳均	activist	502.0K	¥3,195	+2.2%	¥1.6B ($10.6M)
2026-03-03	BUY	unknown	有限会社エムエムエス	strategic	1.5M	¥3,195	-2.2%	¥4.9B ($31.7M)
2026-03-03	BUY	unknown	柳均	activist	231.0K	¥3,195	-2.2%	¥754M ($4.9M)
2026-03-03	SELL	unknown	有限会社エムエムエス	strategic	1.5M	¥3,195	-2.2%	¥4.9B ($31.7M)
2026-03-03	BUY	unknown	柳均	activist	231.0K	¥3,195	-2.2%	¥754M ($4.9M)
2026-03-03	BUY	unknown	有限会社エムエムエス	strategic	1.5M	¥3,195	-2.2%	¥4.9B ($31.7M)
2026-03-03	BUY	unknown	柳均	activist	231.0K	¥3,195	-2.2%	¥754M ($4.9M)
2026-03-03	BUY	unknown	有限会社エムエムエス	strategic	1.5M	¥3,195	-2.2%	¥4.9B ($31.7M)
2026-03-03	BUY	unknown	柳均	activist	231.0K	¥3,195	-2.2%	¥754M ($4.9M)
2026-03-03	BUY	Market Buy	有限会社エムエムエス	strategic	1.5M	¥3,195	-2.2%	¥4.9B ($31.7M)
2026-03-03	BUY	Market Buy	柳均	activist	231.0K	¥3,195	+2.2%	¥754M ($4.9M)
2026-03-03	BUY	unknown	有限会社エムエムエス	strategic	1.5M	¥3,195	-2.2%	¥4.9B ($31.7M)
2026-03-03	BUY	unknown	柳均	activist	230.0K	¥3,195	-2.2%	¥751M ($4.8M)
2026-03-03	BUY	unknown	有限会社エムエムエス	strategic	1.5M	¥3,195	+2.2%	¥4.9B ($31.7M)
2026-03-03	SELL	unknown	柳均	activist	230.0K	¥3,195	-2.2%	¥751M ($4.8M)
2026-03-03	BUY	Market Buy	有限会社エムエムエス	strategic	900.0K	¥3,195	-2.2%	¥2.9B ($19.0M)
2026-03-03	BUY	Market Buy	柳均	activist	502.0K	¥3,195	+2.2%	¥1.6B ($10.6M)
2026-02-20	SELL	unknown	有限会社エムエムエス	strategic	1.5M	¥2,913	-12.1%	¥4.9B ($31.7M)
2026-02-20	BUY	unknown	柳均	activist	231.0K	¥2,913	+12.1%	¥754M ($4.9M)
2026-02-20	SELL	Market Buy	有限会社エムエムエス	strategic	1.5M	¥2,913	-12.1%	¥4.9B ($31.7M)
2026-02-20	BUY	Market Buy	柳均	activist	231.0K	¥2,913	+12.1%	¥754M ($4.9M)
2025-05-30	BUY	Market Buy	フォーシーズンズ・アジア・インベストメント FOUR SEASONS ASIA INVESTMENT PTE. LTD.	passive	51.9K	¥1,514	+115.7%	¥273M ($1.8M)
2025-05-30	BUY	Market Buy	フォーシーズンズ・アジア・インベストメント FOUR SEASONS ASIA INVESTMENT PTE. LTD.	passive	51.9K	¥1,514	+115.7%	¥273M ($1.8M)
2025-05-30	BUY	Market Buy	フォーシーズンズ・アジア・インベストメント FOUR SEASONS ASIA INVESTMENT PTE. LTD.	passive	51.9K	¥1,514	+115.7%	¥273M ($1.8M)
2025-05-30	SELL	Market Buy	フォーシーズンズ・アジア・インベストメント FOUR SEASONS ASIA INVESTMENT PTE. LTD.	passive	51.9K	¥1,514	-115.7%	¥273M ($1.8M)
2025-05-22	BUY	Market Buy	フォーシーズンズ・アジア・インベストメント FOUR SEASONS ASIA INVESTMENT PTE. LTD.	passive	231.7K	¥1,487	+119.6%	¥83M ($539K)
2025-03-31	SELL	Market Buy	フォーシーズンズ・アジア・インベストメント FOUR SEASONS ASIA INVESTMENT PTE. LTD.	passive	175.7K	¥1,508	-116.5%	¥72M ($466K)
2025-03-31	BUY	Market Buy	フォーシーズンズ・アジア・インベストメント FOUR SEASONS ASIA INVESTMENT PTE. LTD.	passive	175.7K	¥1,508	+116.5%	¥75M ($483K)
2025-02-28	BUY	Market Buy	フォーシーズンズ・アジア・インベストメント FOUR SEASONS ASIA INVESTMENT PTE. LTD.	passive	225.5K	¥1,484	+120.0%	¥335M ($2.2M)
2025-02-28	BUY	Market Buy	フォーシーズンズ・アジア・インベストメント FOUR SEASONS ASIA INVESTMENT PTE. LTD.	passive	223.6K	¥1,484	+120.0%	¥332M ($2.1M)
2025-02-28	BUY	Market Buy	フォーシーズンズ・アジア・インベストメント FOUR SEASONS ASIA INVESTMENT PTE. LTD.	passive	223.6K	¥1,484	+120.0%	¥332M ($2.1M)
2024-11-15	SELL	unknown	有限会社エムエムエス MMS Ltd.	strategic	1.5M	¥2,065	-58.1%	¥2M ($12K)
2024-11-15	SELL	unknown	有限会社エムエムエス MMS Ltd.	strategic	1.5M	¥2,065	-58.1%	¥2M ($12K)
2024-11-15	BUY	Market Buy	有限会社エムエムエス MMS Ltd.	strategic	1.5M	¥2,065	+58.1%	¥1.2B ($8.0M)
2024-11-15	SELL	unknown	柳至 Itaru Yanagi	strategic	130.0K	¥2,065	-58.1%	¥564M ($3.6M)
2024-11-15	SELL	Market Buy	柳均 Hitoshi Yanagi	activist	230.0K	¥2,065	-58.1%	¥559M ($3.6M)
2024-11-15	BUY	unknown	柳均 Hitoshi Yanagi	activist	231.0K	¥2,065	+58.1%	¥892K ($6K)
2024-11-15	BUY	unknown	柳均 Hitoshi Yanagi	activist	231.0K	¥2,065	+58.1%	¥892K ($6K)
2024-02-05	BUY	unknown	柳均 Hitoshi Yanagi	activist	501.0K	¥2,880	+13.4%	¥1.4B ($9.3M)
2024-02-05	BUY	unknown	有限会社エムエムエス MMS Ltd.	strategic	900.0K	¥2,880	+13.4%	¥2.6B ($16.7M)
2024-02-05	BUY	unknown	有限会社エムエムエス MMS Ltd.	strategic	900.0K	¥2,880	+13.4%	¥287M ($1.9M)
2024-02-05	BUY	unknown	柳均 Hitoshi Yanagi	activist	501.0K	¥2,880	+13.4%	¥1.4B ($9.3M)
2024-02-01	SELL	unknown	豊田通商株式会社 Toyota Tsusho Corporation	other	215.0K	¥2,844	-14.8%	¥351M ($2.3M)
2024-02-01	BUY	unknown	豊田通商株式会社取締役社長貸谷伊知郎 TOYOTA TSUSHO CORPORATION	other	215.0K	¥2,844	+14.8%	¥351M ($2.3M)
2023-08-22	BUY	unknown	有限会社エムエムエス MMS Ltd.	strategic	900.0K	¥3,175	+2.8%	¥317M ($2.0M)
2023-08-22	SELL	unknown	柳忍 Shinobu Yanagi	strategic	196.0K	¥3,175	-2.8%	¥318M ($2.1M)
2023-08-22	BUY	unknown	柳均 Hitoshi Yanagi	activist	501.0K	¥3,175	+2.8%	¥1.6B ($10.3M)
2023-08-22	BUY	unknown	柳忍 Shinobu Yanagi	strategic	196.0K	¥3,175	+2.8%	¥318M ($2.1M)
2023-08-22	BUY	unknown	柳忍 Shinobu Yanagi	strategic	196.0K	¥3,175	+2.8%	¥318M ($2.1M)

Showing the 50 most recent of 83 filings.

Frequently asked questions

Who has been buying Sanwayuka Industry Corporation stock?: 7 distinct investors have filed 31 disclosed large-shareholding filings in Sanwayuka Industry Corporation (4125), most recently on 2026-03-03. 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 Sanwayuka Industry Corporation have?: Sanwayuka Industry Corporation has 31 buy-side and 19 sell-side disclosures on record, covering ¥26.3B ($169.5M) in total reported value, spanning 2021-12-27 to 2026-03-03.
Where does StockDrifts get Sanwayuka Industry Corporation 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 Sanwayuka Industry Corporation. For how StockDrifts scores these disclosures, see the Japan insider signal tier research, or browse every Japanese stock we track.