Who has been buying Suzumo Machinery Company Limited stock?

8 distinct investors have filed 4 disclosed large-shareholding filings in Suzumo Machinery Company Limited (6405), most recently on 2026-04-07. 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 Suzumo Machinery Company Limited have?

Suzumo Machinery Company Limited has 4 buy-side and 6 sell-side disclosures on record, covering ¥1.8B ($11.8M) in total reported value, spanning 2022-06-22 to 2026-04-07.

Where does StockDrifts get Suzumo Machinery Company Limited 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.

Suzumo Machinery Company Limited 6405

Company

鈴茂器工株式会社Suzumo Machinery Company Limited

Investors

Buys

Total Value

¥1.8B ($11.8M)

Avg Return

+2.02%

Last Filing

2026-04-07

Suzumo Machinery Company Limited (6405) has 4 disclosed large-shareholding filings and 6 disclosed disposals on record, filed by 8 distinct investors. Together those filings cover ¥1.8B ($11.8M) in reported transaction value. The earliest filing StockDrifts holds for Suzumo Machinery Company Limited is dated 2022-06-22; the most recent is 2026-04-07. 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 +2.02%, 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
2026-04-07	BUY	unknown	みずほ信託銀行株式会社	other	231.9K	¥1,134	-3.6%	¥263M ($1.7M)
2026-04-07	SELL	unknown	アセットマネジメントOne株式会社	other	306.4K	¥1,134	+3.6%	¥150M ($967K)
2025-12-22	BUY	unknown	アセットマネジメントOne株式会社	other	438.4K	¥1,228	-5.7%	¥508M ($3.3M)
2025-12-22	BUY	unknown	みずほ信託銀行株式会社	other	231.9K	¥1,228	-5.7%	¥269M ($1.7M)
2025-08-12	SELL	unknown	ガルフ・ジャパン1(Gulf Japan 1) Gulf Japan 1	other	0	¥1,582	+26.8%	¥2.8B ($18.3M)
2025-08-12	BUY	unknown	ガルフ・ジャパン1(Gulf Japan 1) Gulf Japan 1	other	1.8M	¥1,582	-26.8%	¥2.8B ($18.3M)
2025-06-06	BUY	unknown	合同会社アン・コーポレーション Ann Corporation LLC	strategic	1.2M	¥1,826	-36.6%	¥2.3B ($14.6M)
2025-06-06	BUY	unknown	合同会社アン・コーポレーション Ann Corporation LLC	strategic	1.2M	¥1,826	-36.6%	¥2.3B ($14.6M)
2023-09-04	SELL	unknown	ハイクレア・インターナショナル・インベスターズ・エルエルピー(Highclere International Investors LLP) Highclere International Investors LLP	other	589.3K	¥1,053	-10.0%	¥138M ($889K)
2023-06-20	BUY	unknown	鈴木映子 Akiko Suzuki	strategic	1.6M	¥1,060	+9.3%	¥1.7B ($11.1M)
2022-08-19	SELL	unknown	鈴木節子 Setsuko Suzuki	strategic	0	¥1,014	-14.2%	¥1.3B ($8.4M)
2022-08-19	BUY	unknown	合同会社アン・コーポレーション Ann Corporation LLC	strategic	1.2M	¥1,014	+14.2%	¥1.3B ($8.1M)
2022-07-01	BUY	Market Buy	ガルフ・ジャパン1(Gulf Japan 1) Gulf Japan 1	other	898.5K	¥1,100	+5.3%	¥60M ($386K)
2022-07-01	BUY	unknown	ガルフ・ジャパン1(Gulf Japan 1) Gulf Japan 1	other	898.5K	¥1,100	+5.3%	¥60M ($386K)
2022-06-22	BUY	unknown	鈴木映子 Akiko Suzuki	strategic	813.0K	¥1,105.5	+4.8%	¥899M ($5.8M)
2022-06-22	SELL	unknown	鈴木節子 Setsuko Suzuki	strategic	640.2K	¥1,105.5	-4.8%	¥730M ($4.7M)
2022-06-22	SELL	unknown	鈴木美奈子 Minako Suzuki	strategic	813.0K	¥1,105.5	-4.8%	¥80M ($513K)
2022-06-22	BUY	unknown	鈴木節子 Setsuko Suzuki	strategic	640.2K	¥1,105.5	+4.8%	¥730M ($4.7M)

Frequently asked questions

Who has been buying Suzumo Machinery Company Limited stock?: 8 distinct investors have filed 4 disclosed large-shareholding filings in Suzumo Machinery Company Limited (6405), most recently on 2026-04-07. 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 Suzumo Machinery Company Limited have?: Suzumo Machinery Company Limited has 4 buy-side and 6 sell-side disclosures on record, covering ¥1.8B ($11.8M) in total reported value, spanning 2022-06-22 to 2026-04-07.
Where does StockDrifts get Suzumo Machinery Company Limited 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 Suzumo Machinery Company Limited. For how StockDrifts scores these disclosures, see the Japan insider signal tier research, or browse every Japanese stock we track.