Who has been buying Matsuoka Corporation stock?

5 distinct investors have filed 6 disclosed large-shareholding filings in Matsuoka Corporation (3611), most recently on 2025-03-24. 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 Matsuoka Corporation have?

Matsuoka Corporation has 6 buy-side and 16 sell-side disclosures on record, covering ¥2.8B ($17.8M) in total reported value, spanning 2021-08-30 to 2025-03-24.

Where does StockDrifts get Matsuoka 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.

Matsuoka Corporation 3611

Company

株式会社マツオカコーポレーションMatsuoka Corporation

Investors

Buys

Total Value

¥2.8B ($17.8M)

Avg Return

+75.63%

Last Filing

2025-03-24

Matsuoka Corporation (3611) has 6 disclosed large-shareholding filings and 16 disclosed disposals on record, filed by 5 distinct investors. Together those filings cover ¥2.8B ($17.8M) in reported transaction value. The earliest filing StockDrifts holds for Matsuoka Corporation is dated 2021-08-30; the most recent is 2025-03-24. 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 +75.63%, 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
2025-03-24	SELL	Market Buy	株式会社日本政策投資銀行 Development Bank of Japan Inc.	passive	808.1K	¥1,890	-15.9%	¥719M ($4.6M)
2025-03-18	SELL	unknown	合同会社マツオカカンパニー Matsuoka Company LLC	activist	1.8M	¥1,917	-14.2%	¥147M ($950K)
2025-03-18	SELL	unknown	松岡典之 Matsuoka Noriyuki	activist	1.3M	¥1,917	-14.2%	¥103M ($664K)
2025-03-12	SELL	Market Buy	株式会社日本政策投資銀行 Development Bank of Japan Inc.	passive	1.2M	¥1,820	-20.3%	¥468M ($3.0M)
2024-10-01	SELL	unknown	松岡典之 Matsuoka Noriyuki	activist	1.3M	¥1,828	-19.8%	¥2M ($12K)
2024-10-01	SELL	unknown	合同会社マツオカカンパニー Matsuoka Company LLC	activist	1.8M	¥1,828	-19.8%	¥2M ($12K)
2024-10-01	SELL	unknown	合同会社マツオカカンパニー Matsuoka Company LLC	activist	1.8M	¥1,828	-19.8%	¥2M ($12K)
2024-10-01	SELL	unknown	松岡典之 Matsuoka Noriyuki	activist	1.3M	¥1,828	-19.8%	¥2M ($12K)
2024-01-05	SELL	Market Buy	スパークス・アセット・マネジメント株式会社 SPARX Asset Management Co., Ltd.	passive	391.3K	¥1,445	-51.6%	¥184M ($1.2M)
2023-10-13	BUY	unknown	合同会社マツオカカンパニー Matsuoka Company LLC	activist	1.8M	¥1,625	+34.8%	¥2.9B ($18.6M)
2023-10-13	BUY	unknown	松岡典之 Matsuoka Noriyuki	activist	1.3M	¥1,625	+34.8%	¥2.0B ($13.1M)
2023-07-04	BUY	Market Buy	スパークス・アセット・マネジメント株式会社 SPARX Asset Management Co., Ltd.	passive	518.2K	¥1,210	+81.0%	¥627M ($4.0M)
2023-03-13	BUY	unknown	合同会社マツオカカンパニー Matsuoka Company LLC	activist	1.8M	¥1,387	+57.9%	¥417M ($2.7M)
2023-03-13	SELL	unknown	松岡典之 Matsuoka Noriyuki	activist	1.3M	¥1,387	-57.9%	¥415M ($2.7M)
2022-10-04	BUY	subscription	株式会社日本政策投資銀行 Development Bank of Japan Inc.	passive	1.6M	¥962	+127.7%	¥1.5B ($10.0M)
2022-09-20	SELL	Market Buy	スパークス・アセット・マネジメント株式会社 SPARX Asset Management Co., Ltd.	passive	348.1K	¥980	-123.5%	¥159M ($1.0M)
2022-09-02	BUY	unknown	合同会社マツオカカンパニー Matsuoka Company LLC	activist	1.5M	¥935	+134.2%	¥1.4B ($8.9M)
2022-09-02	BUY	unknown	松岡典之 Matsuoka Noriyuki	activist	1.6M	¥935	+134.2%	¥1.5B ($9.4M)
2022-06-17	SELL	Market Buy	イーストスプリング・インベストメンツ(シンガポール)リミテッド(Eastspring Investments (Singapore) Limited) Eastspring Investments (Singapore) Limited	passive	167.7K	¥950	-130.5%	¥321M ($2.1M)
2022-02-16	SELL	unknown	合同会社マツオカカンパニー Matsuoka Company LLC	activist	1.5M	¥1,189	-84.2%	¥4M ($23K)
2022-02-16	SELL	unknown	松岡典之 Matsuoka Noriyuki	activist	1.6M	¥1,189	-84.2%	¥4M ($23K)
2021-12-14	BUY	unknown	合同会社マツオカカンパニー Matsuoka Company LLC	activist	1.5M	¥1,225	+78.8%	¥54M ($350K)
2021-12-14	BUY	unknown	松岡典之 Matsuoka Noriyuki	activist	1.6M	¥1,225	+78.8%	¥1.9B ($12.3M)
2021-08-30	BUY	unknown	合同会社マツオカカンパニー Matsuoka Company LLC	activist	1.5M	¥1,420	+54.2%	¥60M ($388K)
2021-08-30	BUY	unknown	合同会社マツオカカンパニー Matsuoka Company LLC	activist	1.5M	¥1,420	+54.2%	¥60M ($388K)
2021-08-30	SELL	unknown	松岡典之 Matsuoka Noriyuki	activist	1.6M	¥1,420	-54.2%	¥4M ($28K)
2021-08-30	SELL	unknown	松岡典之 Matsuoka Noriyuki	activist	1.6M	¥1,420	-54.2%	¥4M ($28K)

Frequently asked questions

Who has been buying Matsuoka Corporation stock?: 5 distinct investors have filed 6 disclosed large-shareholding filings in Matsuoka Corporation (3611), most recently on 2025-03-24. 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 Matsuoka Corporation have?: Matsuoka Corporation has 6 buy-side and 16 sell-side disclosures on record, covering ¥2.8B ($17.8M) in total reported value, spanning 2021-08-30 to 2025-03-24.
Where does StockDrifts get Matsuoka 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 Matsuoka Corporation. For how StockDrifts scores these disclosures, see the Japan insider signal tier research, or browse every Japanese stock we track.