Who has been buying Komatsu Ltd. stock?

20 distinct investors have filed 33 disclosed large-shareholding filings in Komatsu Ltd. (6301), most recently on 2025-09-19. 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 Komatsu Ltd. have?

Komatsu Ltd. has 33 buy-side and 12 sell-side disclosures on record, covering ¥289.2B ($1.9B) in total reported value, spanning 2021-07-06 to 2025-09-19.

Where does StockDrifts get Komatsu 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.

Komatsu Ltd. 6301

Company

株式会社小松製作所Komatsu Ltd.

Investors

Buys

Total Value

¥289.2B ($1.9B)

Avg Return

+111.28%

Last Filing

2025-09-19

Komatsu Ltd. (6301) has 33 disclosed large-shareholding filings and 12 disclosed disposals on record, filed by 20 distinct investors. Together those filings cover ¥289.2B ($1.9B) in reported transaction value. The earliest filing StockDrifts holds for Komatsu Ltd. is dated 2021-07-06; the most recent is 2025-09-19. 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 +111.28%, 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
2025-09-19	BUY	Market Buy	アモーヴァ・アセットマネジメント株式会社 Amova Asset Management Co., Ltd.	other	21.4M	¥5,219	+34.1%	¥4.5B ($28.8M)
2025-09-19	BUY	Market Buy	三井住友トラスト・アセットマネジメント株式会社 Sumitomo Mitsui Trust Asset Management Co.,Ltd.	other	30.7M	¥5,219	+34.1%	¥8.4B ($54.4M)
2025-05-20	SELL	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	1.6M	¥4,353	-60.8%	¥1.2B ($8.0M)
2025-05-20	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	233.0K	¥4,353	+60.8%	¥78.2B ($504.8M)
2025-05-20	BUY	Market Buy	ブラックロック(ネザーランド)BVBV) BlackRock (Netherlands	passive	2.7M	¥4,353	+60.8%	¥828M ($5.3M)
2025-05-20	BUY	Market Buy	アペリオ・グループ・エルエルシー(Aperio Group Aperio Group, LLC	passive	1.2M	¥4,353	+60.8%	¥5.2B ($33.8M)
2025-05-20	SELL	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 BlackRock Institutional Trust Company, N.A.	passive	11.3M	¥4,353	-60.8%	¥8.7B ($56.1M)
2025-05-20	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	18.3M	¥4,353	+60.8%	¥17.8B ($114.8M)
2025-05-20	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	6.5M	¥4,353	+60.8%	¥414M ($2.7M)
2025-05-20	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	1.1M	¥4,353	+60.8%	¥4.8B ($30.8M)
2025-05-20	BUY	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	4.3M	¥4,353	+60.8%	¥5.0B ($32.0M)
2025-05-20	SELL	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	889.1K	¥4,353	-60.8%	¥6.2B ($40.1M)
2025-05-20	SELL	Market Buy	ブラックロック・アドバイザーズ・エルエルシー(BlackRock Advisers BlackRock Advisers, LLC	passive	861.7K	¥4,353	-60.8%	¥65.0B ($419.3M)
2025-05-20	BUY	Market Buy	ブラックロック・ジャパン株式会社 BlackRock Japan Co., Ltd.	passive	21.3M	¥4,353	+60.8%	¥17.4B ($112.2M)
2024-11-05	SELL	Market Buy	三菱UFJモルガン・スタンレー証券株式会社 Mitsubishi UFJ Morgan Stanley Securities Co., Ltd.	other	869.3K	¥4,012	-74.5%	¥49.6B ($320.1M)
2024-11-05	BUY	Market Buy	三菱UFJアセットマネジメント株式会社 Mitsubishi UFJ Financial Group Inc.	passive	13.3M	¥4,012	+74.5%	¥781M ($5.0M)
2024-11-05	BUY	Market Buy	三菱UFJ信託銀行株式会社 Mitsubishi UFJ Financial Group Inc.	passive	23.0M	¥4,012	+74.5%	¥1.6B ($10.1M)
2024-10-07	BUY	Market Buy	三菱UFJモルガン・スタンレー証券株式会社 Mitsubishi UFJ Morgan Stanley Securities Co., Ltd.	other	13.2M	¥4,176	+67.6%	¥55.2B ($356.1M)
2024-10-07	BUY	Market Buy	三菱UFJアセットマネジメント株式会社 Mitsubishi UFJ Financial Group Inc.	passive	13.1M	¥4,176	+67.6%	¥54.6B ($352.0M)
2024-10-07	BUY	Market Buy	三菱UFJ信託銀行株式会社 Mitsubishi UFJ Financial Group Inc.	passive	22.6M	¥4,176	+67.6%	¥94.3B ($608.5M)
2022-06-21	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	1.9M	¥3,077	+127.5%	¥599M ($3.9M)
2022-06-21	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 BlackRock Institutional Trust Company, N.A.	passive	13.6M	¥3,077	+127.5%	¥1.8B ($11.6M)
2022-06-21	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	14.6M	¥3,077	+127.5%	¥3.3B ($21.3M)
2022-06-21	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	6.6M	¥3,077	+127.5%	¥1.2B ($7.7M)
2022-06-21	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	1.1M	¥3,077	+127.5%	¥3.4B ($22.0M)
2022-06-21	BUY	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	3.2M	¥3,077	+127.5%	¥1.2B ($7.7M)
2022-06-21	SELL	Market Buy	ブラックロック(ネザーランド)BVBV) BlackRock (Netherlands	passive	2.6M	¥3,077	-127.5%	¥2.1B ($13.5M)
2022-06-21	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	2.3M	¥3,077	+127.5%	¥599M ($3.9M)
2022-06-21	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 BlackRock Advisers, LLC	passive	16.1M	¥3,077	+127.5%	¥12.9B ($83.1M)
2022-06-21	SELL	Market Buy	アペリオ・グループ・エルエルシー(Aperio Group Aperio Group, LLC	passive	920.0K	¥3,077	-127.5%	¥299M ($1.9M)
2022-06-21	BUY	Market Buy	ブラックロック・ジャパン株式会社 BlackRock Japan Co., Ltd.	passive	17.8M	¥3,077	+127.5%	¥11.4B ($73.4M)
2022-05-20	SELL	unknown	ノムラインターナショナルピーエルシー NOMURA INTERNATIONAL PLC	other	25.7K	¥3,211	-118.0%	¥9.4B ($60.5M)
2022-05-20	BUY	unknown	野村アセットマネジメント株式会社 Nomura Asset Management Co., Ltd.	other	50.2M	¥3,211	+118.0%	¥159.4B ($1.0B)
2022-05-20	SELL	unknown	野村證券株式会社 Nomura Securities Co.,Ltd.	other	543.4K	¥3,211	-118.0%	¥4.1B ($26.2M)
2021-08-19	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	1.8M	¥2,668	+162.4%	¥260M ($1.7M)
2021-08-19	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 BlackRock Institutional Trust Company, N.A.	passive	13.1M	¥2,668	+162.4%	¥1.8B ($11.7M)
2021-08-19	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	13.5M	¥2,668	+162.4%	¥1.3B ($8.4M)
2021-08-19	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	6.1M	¥2,668	+162.4%	¥519M ($3.3M)
2021-08-19	BUY	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	2.9M	¥2,668	+162.4%	¥779M ($5.0M)
2021-08-19	SELL	Market Buy	ブラックロック(ネザーランド)BVBV) BlackRock (Netherlands	passive	3.3M	¥2,668	-162.4%	¥260M ($1.7M)
2021-08-19	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	2.1M	¥2,668	+162.4%	¥1.8B ($11.7M)
2021-08-19	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 BlackRock Advisers, LLC	passive	12.0M	¥2,668	+162.4%	¥15.6B ($100.5M)
2021-08-19	BUY	Market Buy	アペリオ・グループ・エルエルシー(Aperio Group Aperio Group, LLC	passive	998.8K	¥2,668	+162.4%	¥2.7B ($17.2M)
2021-08-19	BUY	Market Buy	ブラックロック・ジャパン株式会社 BlackRock Japan Co., Ltd.	passive	14.0M	¥2,668	+162.4%	¥1.0B ($6.7M)
2021-07-06	SELL	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	1.6M	¥2,799	-150.1%	¥8.4B ($54.5M)
2021-07-06	SELL	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 BlackRock Institutional Trust Company, N.A.	passive	12.4M	¥2,799	-150.1%	¥1.9B ($12.3M)
2021-07-06	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	13.1M	¥2,799	+150.1%	¥3.5B ($22.8M)
2021-07-06	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	5.9M	¥2,799	+150.1%	¥4.6B ($29.9M)
2021-07-06	BUY	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	2.6M	¥2,799	+150.1%	¥3.0B ($19.3M)
2021-07-06	BUY	Market Buy	ブラックロック(ネザーランド)BVBV) BlackRock (Netherlands	passive	3.4M	¥2,799	+150.1%	¥9.6B ($61.8M)

Showing the 50 most recent of 54 filings.

Frequently asked questions

Who has been buying Komatsu Ltd. stock?: 20 distinct investors have filed 33 disclosed large-shareholding filings in Komatsu Ltd. (6301), most recently on 2025-09-19. 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 Komatsu Ltd. have?: Komatsu Ltd. has 33 buy-side and 12 sell-side disclosures on record, covering ¥289.2B ($1.9B) in total reported value, spanning 2021-07-06 to 2025-09-19.
Where does StockDrifts get Komatsu 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 Komatsu Ltd.. For how StockDrifts scores these disclosures, see the Japan insider signal tier research, or browse every Japanese stock we track.