Who has been buying Mitsui Kinzoku Co., Ltd. stock?

25 distinct investors have filed 70 disclosed large-shareholding filings in Mitsui Kinzoku Co., Ltd. (5706), most recently on 2026-05-11. 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 Mitsui Kinzoku Co., Ltd. have?

Mitsui Kinzoku Co., Ltd. has 70 buy-side and 55 sell-side disclosures on record, covering ¥239.8B ($1.5B) in total reported value, spanning 2021-03-19 to 2026-05-11.

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.

Mitsui Kinzoku Co., Ltd. 5706

Company

三井金属鉱業株式会社Mitsui Kinzoku Co., Ltd.

Investors

Buys

Total Value

¥239.8B ($1.5B)

Avg Return

+683.13%

Last Filing

2026-05-11

Mitsui Kinzoku Co., Ltd. (5706) has 70 disclosed large-shareholding filings and 55 disclosed disposals on record, filed by 25 distinct investors. Together those filings cover ¥239.8B ($1.5B) in reported transaction value. The earliest filing StockDrifts holds for Mitsui Kinzoku Co., Ltd. is dated 2021-03-19; the most recent is 2026-05-11. Across these filings the average return since disclosure is +683.13%, 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
2026-10-07	BUY	Market Buy	野村アセットマネジメント株式会社	other	36.5M	¥2,750.5	-17.8%	¥7.9B ($50.9M)
2026-10-07	BUY	Market Buy	ノムラインターナショナルピーエルシー NOMURA INTERNATIONAL PLC	other	363.2K	¥2,750.5	-17.8%	¥3.3B ($21.4M)
2026-10-07	BUY	Market Buy	野村證券株式会社	other	5.4M	¥2,750.5	-17.8%	¥6.5B ($41.8M)
2026-09-25	SELL	Market Buy	キャピタル・リサーチ・アンド・マネージメント・カンパニー(Capital Research and Management Company) Capital Research and Management Company	passive	2.1M	¥22,795	+90.1%	¥59.2B ($381.7M)
2026-09-07	SELL	Market Buy	キャピタル・リサーチ・アンド・マネージメント・カンパニー(Capital Research and Management Company) Capital Research and Management Company	passive	4.7M	¥25,800	+91.2%	¥15.4B ($99.4M)
2026-08-06	BUY	Market Buy	野村アセットマネジメント株式会社	other	3.4M	¥31,970	-92.9%	¥184M ($1.2M)
2026-08-06	BUY	Market Buy	野村證券株式会社	other	310.6K	¥31,970	-92.9%	¥4.8B ($30.8M)
2026-08-06	SELL	unknown	ノムラインターナショナルピーエルシー NOMURA INTERNATIONAL PLC	other	-84.1K	¥35,380	+0.0%	-
2026-07-22	SELL	unknown	野村證券株式会社	other	159.7K	¥33,600	+93.3%	¥3.7B ($23.6M)
2026-07-22	BUY	unknown	ノムラインターナショナルピーエルシー NOMURA INTERNATIONAL PLC	other	290.4K	¥33,600	-	¥9.8B ($63.0M)
2026-07-22	SELL	unknown	野村アセットマネジメント株式会社	other	3.4M	¥33,600	+93.3%	¥12.9B ($83.4M)
2026-07-07	BUY	Market Buy	キャピタル・リサーチ・アンド・マネージメント・カンパニー(Capital Research and Management Company) Capital Research and Management Company	passive	5.3M	¥35,930	-93.7%	¥77.4B ($499.1M)
2026-06-22	BUY	Market Buy	キャピタル・リサーチ・アンド・マネージメント・カンパニー(Capital Research and Management Company) Capital Research and Management Company	passive	3.2M	¥52,930	-95.7%	¥166.8B ($1.1B)
2026-06-05	SELL	Market Buy	ブラックロック・ジャパン株式会社	passive	982.8K	¥44,490	+94.9%	¥6.9B ($44.5M)
2026-06-05	BUY	Market Buy	ブラックロック・アドバイザーズ・エルエルシー BlackRock Advisers, LLC	passive	61.8K	¥44,490	-	¥2.7B ($17.7M)
2026-06-05	SELL	Market Buy	ブラックロック・フィナンシャル・マネジメント・インク BlackRock Financial Management, Inc.	passive	23.4K	¥44,490	+94.9%	¥2.6B ($16.5M)
2026-06-05	BUY	Market Buy	ブラックロック・インベストメント・マネジメント・エルエルシー BlackRock Investment Management LLC	passive	60.4K	¥44,490	-	¥2.7B ($17.3M)
2026-06-05	SELL	Market Buy	ブラックロック・ファンド・マネジャーズ・リミテッド BlackRock Fund Managers Limited	passive	74.8K	¥44,490	+94.9%	¥2.0B ($13.2M)
2026-06-05	BUY	Market Buy	ブラックロック(ルクセンブルグ)エス・エーS.A.) BlackRock (Luxembourg	passive	101.9K	¥44,490	-94.9%	¥1.0B ($6.6M)
2026-06-05	BUY	Market Buy	ブラックロック・アセット・マネジメント・アイルランド・リミテッド BlackRock Asset Management Ireland Limited	passive	407.3K	¥44,490	-94.9%	¥12.5B ($80.8M)
2026-06-05	BUY	Market Buy	ブラックロック・ファンド・アドバイザーズ BlackRock Fund Advisors	passive	1.3M	¥44,490	-94.9%	¥25.0B ($161.5M)
2026-06-05	BUY	Market Buy	ブラックロック・インベストメント・マネジメント(ユーケー)リミテッドLimited) BlackRock Investment Management (UK	passive	135.9K	¥44,490	-	¥6.0B ($39.0M)
2026-06-05	BUY	Market Buy	ブラックロック・アセット・マネジメント・カナダ・リミテッド BlackRock Asset Management Canada Limited	passive	81.6K	¥44,490	-	¥3.6B ($23.4M)
2026-06-05	BUY	Market Buy	ブラックロック・インスティテューショナル・トラスト・カンパニー、エヌ.エイ. BlackRock Institutional Trust Company, N.A.	passive	718.8K	¥44,490	-94.9%	¥4.1B ($26.4M)
2026-06-05	BUY	Market Buy	ブラックロック(ネザーランド)BVBV) BlackRock (Netherlands	passive	162.8K	¥44,490	-	¥7.2B ($46.7M)
2026-06-04	BUY	Market Buy	野村證券株式会社	other	269.2K	¥46,050	-95.1%	¥12.4B ($80.2M)
2026-06-04	SELL	unknown	野村アセットマネジメント株式会社	other	3.7M	¥46,050	+95.1%	¥3.4B ($22.2M)
2026-06-04	SELL	unknown	ノムラインターナショナルピーエルシー NOMURA INTERNATIONAL PLC	other	-326.4K	¥46,050	+15.9%	¥45.5B ($293.4M)
2026-05-11	BUY	Market Buy	ノムラインターナショナルピーエルシー NOMURA INTERNATIONAL PLC	other	662.4K	¥51,250	-95.6%	¥29.4B ($189.8M)
2026-05-11	SELL	unknown	野村證券株式会社	other	2.8K	¥51,250	+95.6%	¥30.9B ($199.3M)
2026-05-11	BUY	Market Buy	野村アセットマネジメント株式会社	other	3.8M	¥51,250	-95.6%	¥2.1B ($13.3M)
2026-04-06	BUY	Market Buy	野村證券株式会社	other	604.4K	¥31,960	-92.9%	¥14.3B ($92.3M)
2026-04-06	BUY	Market Buy	ノムラインターナショナルピーエルシー NOMURA INTERNATIONAL PLC	other	84.1K	¥31,960	-	¥2.7B ($17.3M)
2026-04-06	BUY	Market Buy	野村アセットマネジメント株式会社	other	3.8M	¥31,960	-92.9%	¥3.5B ($22.5M)
2026-03-23	SELL	unknown	みずほ証券株式会社	other	52.4K	¥29,190	+92.3%	¥8.5B ($55.1M)
2026-03-23	SELL	unknown	アセットマネジメントOne株式会社	other	2.4M	¥29,190	+92.3%	¥16.6B ($107.0M)
2026-03-05	BUY	Market Buy	ノムラセキュリテーズインターナショナル NOMURA SECURITIES INTERNATIONAL,Inc.	unknown	0	¥34,170	-	-
2026-03-05	BUY	Market Buy	野村證券株式会社	other	152.7K	¥34,170	-93.4%	¥4.3B ($27.8M)
2026-03-05	SELL	Market Buy	ノムラインターナショナルピーエルシー NOMURA INTERNATIONAL PLC	other	32.0K	¥34,170	+93.4%	¥16.5B ($106.3M)
2026-03-05	SELL	Market Buy	野村アセットマネジメント株式会社	other	3.7M	¥34,170	+93.4%	¥8.0B ($51.9M)
2025-12-19	SELL	unknown	野村證券株式会社	other	31.3K	¥17,150	+86.8%	¥197M ($1.3M)
2025-12-19	SELL	unknown	野村アセットマネジメント株式会社	other	3.9M	¥17,150	+86.8%	¥13.2B ($85.1M)
2025-12-19	BUY	unknown	ノムラインターナショナルピーエルシー NOMURA INTERNATIONAL PLC	other	514.2K	¥17,150	-86.8%	¥985M ($6.4M)
2025-12-19	BUY	unknown	ノムラセキュリテーズインターナショナル NOMURA SECURITIES INTERNATIONAL,Inc.	other	0	¥17,150	-	-
2025-11-20	SELL	unknown	野村證券株式会社 Nomura Securities Co.,Ltd.	other	41.3K	¥20,850	+89.2%	¥1.4B ($9.3M)
2025-11-20	SELL	unknown	ノムラインターナショナルピーエルシー NOMURA INTERNATIONAL PLC	other	458.2K	¥20,850	+89.2%	¥2.2B ($13.9M)
2025-11-20	BUY	unknown	ノムラセキュリテーズインターナショナル NOMURA SECURITIES INTERNATIONAL,Inc.	other	0	¥20,850	-	-
2025-11-20	SELL	unknown	野村アセットマネジメント株式会社 Nomura Asset Management Co., Ltd.	other	4.7M	¥20,850	+89.2%	¥9.5B ($61.0M)
2025-11-10	BUY	unknown	みずほ証券株式会社 Mizuho Securities Co., Ltd.	other	343.1K	¥15,965	-85.8%	¥5.5B ($35.3M)
2025-11-10	BUY	unknown	アセットマネジメントOne株式会社 Asset Management One Co., Ltd.	other	3.0M	¥15,965	-85.8%	¥48.0B ($309.8M)

Showing the 50 most recent of 161 filings.

Frequently asked questions

Who has been buying Mitsui Kinzoku Co., Ltd. stock?: 25 distinct investors have filed 70 disclosed large-shareholding filings in Mitsui Kinzoku Co., Ltd. (5706), most recently on 2026-05-11. 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 Mitsui Kinzoku Co., Ltd. have?: Mitsui Kinzoku Co., Ltd. has 70 buy-side and 55 sell-side disclosures on record, covering ¥239.8B ($1.5B) in total reported value, spanning 2021-03-19 to 2026-05-11.
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.

More on this data

Every trade listed above comes from an official regulatory disclosure. For how StockDrifts scores these disclosures, see the Japan insider signal tier research, or browse every Japanese stock we track.