Who has been buying Maruzen Co., Ltd. stock?

11 distinct investors have filed 10 disclosed large-shareholding filings in Maruzen Co., Ltd. (5982), most recently on 2025-09-29. 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 Maruzen Co., Ltd. have?

Maruzen Co., Ltd. has 10 buy-side and 8 sell-side disclosures on record, covering ¥5.8B ($37.1M) in total reported value, spanning 2021-03-26 to 2025-09-29.

Where does StockDrifts get Maruzen 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.

Maruzen Co., Ltd. 5982

Company

株式会社マルゼンMaruzen Co., Ltd.

Investors

Buys

Total Value

¥5.8B ($37.1M)

Avg Return

+53.71%

Last Filing

2025-09-29

Maruzen Co., Ltd. (5982) has 10 disclosed large-shareholding filings and 8 disclosed disposals on record, filed by 11 distinct investors. Together those filings cover ¥5.8B ($37.1M) in reported transaction value. The earliest filing StockDrifts holds for Maruzen Co., Ltd. is dated 2021-03-26; the most recent is 2025-09-29. 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 +53.71%, 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
2026-06-15	BUY	Market Buy	株式会社エフティグループ	passive	544.3K	¥3,830	+6.1%	¥758M ($4.9M)
2026-06-15	BUY	Market Buy	株式会社エスアイエル	passive	21.2K	¥3,830	+6.1%	¥81M ($524K)
2026-06-15	BUY	Market Buy	光通信株式会社	passive	1.2M	¥3,830	+6.1%	¥4.5B ($29.2M)
2026-06-15	BUY	Market Buy	株式会社UH Partners 3	passive	694.0K	¥3,830	+6.1%	¥2.7B ($17.1M)
2026-06-15	BUY	Market Buy	株式会社UH Partners 2	passive	1.3M	¥3,830	+6.1%	¥5.2B ($33.2M)
2025-09-29	BUY	Market Buy	株式会社エフティグループ FTGroup Co., Ltd.	passive	345.3K	¥3,760	+4.3%	¥602M ($3.9M)
2025-09-29	BUY	Market Buy	株式会社エスアイエル SIL Co., Ltd.	passive	21.2K	¥3,760	+4.3%	¥80M ($514K)
2025-09-29	BUY	Market Buy	株式会社UH Partners 3 UH Partners 3 Co., Ltd.	passive	694.0K	¥3,760	+4.3%	¥52M ($336K)
2025-09-29	BUY	Market Buy	株式会社UH Partners 2 UH Partners 2, Inc.	passive	1.3M	¥3,760	+4.3%	¥5.1B ($32.6M)
2025-09-29	BUY	Market Buy	光通信株式会社 Hikari Tsushin K.K.	passive	1.2M	¥3,760	+4.3%	¥4.4B ($28.7M)
2025-02-20	BUY	Market Buy	株式会社エフティグループ FTGroup Co., Ltd.	passive	186.1K	¥3,195	+22.7%	¥595M ($3.8M)
2025-02-20	BUY	Market Buy	光通信株式会社 Hikari Tsushin K.K.	passive	1.2M	¥3,195	+22.7%	¥3.8B ($24.4M)
2025-02-20	BUY	Market Buy	株式会社エスアイエル SIL Co., Ltd.	passive	21.2K	¥3,195	+22.7%	¥68M ($437K)
2025-02-20	BUY	Market Buy	株式会社UH Partners 3 UH Partners 3 Co., Ltd.	passive	692.7K	¥3,195	+22.7%	¥38M ($245K)
2025-02-20	BUY	Market Buy	株式会社UH Partners 2 UH Partners 2, Inc.	passive	1.3M	¥3,195	+22.7%	¥4.3B ($27.7M)
2024-06-13	BUY	Market Buy	株式会社エスアイエル SIL Co., Ltd.	passive	21.2K	¥3,110	+26.1%	¥66M ($425K)
2024-06-13	BUY	Market Buy	株式会社UH Partners 3 UH Partners 3 Co., Ltd.	passive	680.1K	¥3,110	+26.1%	¥615M ($4.0M)
2024-06-13	BUY	Market Buy	株式会社UH Partners 2 UH Partners 2, Inc.	passive	1.3M	¥3,110	+26.1%	¥4.2B ($27.0M)
2024-06-13	BUY	Market Buy	光通信株式会社 Hikari Tsushin K.K.	passive	1.2M	¥3,110	+26.1%	¥3.7B ($23.7M)
2024-02-20	BUY	negotiated	瀬之口和磨 Senokuchi Kazuma	activist	101.6K	¥2,773	+41.4%	¥282M ($1.8M)
2023-12-13	BUY	Market Buy	株式会社エスアイエル SIL Co., Ltd.	passive	21.2K	¥2,475	+58.4%	¥52M ($339K)
2023-12-13	BUY	Market Buy	株式会社UH Partners 3 UH Partners 3 Co., Ltd.	passive	482.0K	¥2,475	+58.4%	¥1.2B ($7.7M)
2023-12-13	BUY	Market Buy	株式会社UH Partners 2 UH Partners 2, Inc.	passive	1.3M	¥2,475	+58.4%	¥3.3B ($21.5M)
2023-12-13	BUY	Market Buy	光通信株式会社 Hikari Tsushin K.K.	passive	1.2M	¥2,475	+58.4%	¥2.9B ($18.9M)
2023-12-12	BUY	Market Buy	株式会社エスアイエル SIL Co., Ltd.	passive	21.2K	¥2,447	+60.2%	¥52M ($335K)
2023-12-12	BUY	Market Buy	株式会社UH Partners 2 UH Partners 2, Inc.	passive	1.3M	¥2,447	+60.2%	¥707M ($4.6M)
2023-12-12	BUY	Market Buy	光通信株式会社 Hikari Tsushin K.K.	passive	1.2M	¥2,447	+60.2%	¥2.9B ($18.7M)
2023-12-07	SELL	unknown	エフエムアールエルエルシー(FMR LLC) FMR LLC	other	513.3K	¥2,401	-63.3%	¥2.3B ($14.9M)
2023-12-04	BUY	Market Buy	株式会社エスアイエル SIL Co., Ltd.	passive	21.2K	¥2,337	+67.7%	¥50M ($320K)
2023-12-04	BUY	Market Buy	株式会社UH Partners 2 UH Partners 2, Inc.	passive	1.1M	¥2,337	+67.7%	¥2.2B ($14.3M)
2023-12-04	BUY	Market Buy	光通信株式会社 Hikari Tsushin K.K.	passive	1.2M	¥2,337	+67.7%	¥2.8B ($17.8M)
2023-10-20	SELL	unknown	エフエムアールエルエルシー(FMR LLC) FMR LLC	other	1.5M	¥2,208	-77.5%	¥563M ($3.6M)
2023-10-06	BUY	Market Buy	光通信株式会社 Hikari Tsushin K.K.	passive	1.2M	¥2,118	+85.1%	¥138M ($892K)
2023-10-06	BUY	Market Buy	株式会社エスアイエル SIL Co., Ltd.	passive	21.2K	¥2,118	+85.1%	¥45M ($290K)
2023-10-06	BUY	Market Buy	株式会社UH Partners 2 UH Partners 2, Inc.	passive	110.5K	¥2,118	+85.1%	¥234M ($1.5M)
2023-10-02	BUY	unknown	株式会社マサトヨ MASATOYO CO.,LTD.	strategic	3.7M	¥2,089	+87.7%	¥7.8B ($50.4M)
2023-10-02	SELL	unknown	一般財団法人マルゼン食みらい創造財団 Maruzen Food Future Creation Foundation	unknown	0	¥2,089	-87.7%	¥942M ($6.1M)
2023-10-02	BUY	unknown	渡邉恵一 Keiichi Watanabe	activist	1.0M	¥2,089	+87.7%	¥950M ($6.1M)
2023-10-02	BUY	unknown	渡邉直子 Naoko Watanabe	strategic	337.0K	¥2,089	+87.7%	¥704M ($4.5M)
2023-09-07	SELL	unknown	エフエムアールエルエルシー(FMR LLC) FMR LLC	other	1.7M	¥2,058	-90.5%	¥509M ($3.3M)
2022-12-09	SELL	unknown	渡邉恵一 Keiichi Watanabe	activist	557.0K	¥1,800	-117.8%	¥798M ($5.1M)
2022-12-09	BUY	unknown	一般財団法人マルゼン食みらい創造財団 Maruzen Food Future Creation Foundation	other	450.0K	¥1,800	+117.8%	¥810M ($5.2M)
2022-12-09	SELL	unknown	渡邉恵一 Keiichi Watanabe	activist	557.0K	¥1,800	-117.8%	¥798M ($5.1M)
2022-12-09	BUY	unknown	渡邉直子 Naoko Watanabe	strategic	337.0K	¥1,800	+117.8%	¥607M ($3.9M)
2022-12-09	BUY	unknown	株式会社マサトヨ MASATOYO CO.,LTD.	strategic	3.7M	¥1,800	+117.8%	¥6.7B ($43.4M)
2022-12-09	BUY	unknown	株式会社マサトヨ MASATOYO CO.,LTD.	strategic	3.7M	¥1,800	+117.8%	¥6.7B ($43.4M)
2022-12-09	BUY	unknown	一般財団法人マルゼン食みらい創造財団 Maruzen Food Future Creation Foundation	other	450.0K	¥1,800	+117.8%	¥810M ($5.2M)
2022-12-09	BUY	unknown	渡邉直子 Naoko Watanabe	strategic	337.0K	¥1,800	+117.8%	¥607M ($3.9M)
2022-12-08	BUY	unknown	渡邉直子 Naoko Watanabe	strategic	337.0K	¥1,797	+118.1%	¥606M ($3.9M)
2022-12-08	BUY	unknown	渡邉恵一 Keiichi Watanabe	activist	557.0K	¥1,797	+118.1%	¥1.0B ($6.5M)

Showing the 50 most recent of 61 filings.

Frequently asked questions

Who has been buying Maruzen Co., Ltd. stock?: 11 distinct investors have filed 10 disclosed large-shareholding filings in Maruzen Co., Ltd. (5982), most recently on 2025-09-29. 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 Maruzen Co., Ltd. have?: Maruzen Co., Ltd. has 10 buy-side and 8 sell-side disclosures on record, covering ¥5.8B ($37.1M) in total reported value, spanning 2021-03-26 to 2025-09-29.
Where does StockDrifts get Maruzen 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 Maruzen Co., Ltd.. For how StockDrifts scores these disclosures, see the Japan insider signal tier research, or browse every Japanese stock we track.