Who has been buying Mitsui O.S.K. Lines, Ltd. stock?

32 distinct investors have filed 128 disclosed large-shareholding filings in Mitsui O.S.K. Lines, Ltd. (9104), most recently on 2026-03-19. 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 Mitsui O.S.K. Lines, Ltd. have?

Mitsui O.S.K. Lines, Ltd. has 128 buy-side and 109 sell-side disclosures on record, covering ¥1.13T ($7.3B) in total reported value, spanning 2021-03-22 to 2026-03-19.

Where does StockDrifts get Mitsui O.S.K. Lines, 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.

Mitsui O.S.K. Lines, Ltd. 9104

Company

株式会社商船三井Mitsui O.S.K. Lines, Ltd.

Investors

Buys

128

Total Value

¥1.13T ($7.3B)

Avg Return

+70.75%

Last Filing

2026-03-19

Mitsui O.S.K. Lines, Ltd. (9104) has 128 disclosed large-shareholding filings and 109 disclosed disposals on record, filed by 32 distinct investors. Together those filings cover ¥1.13T ($7.3B) in reported transaction value. The earliest filing StockDrifts holds for Mitsui O.S.K. Lines, Ltd. is dated 2021-03-22; the most recent is 2026-03-19. 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 +70.75%, 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
2026-06-03	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.	unknown	0	¥5,459	-4.9%	-
2026-06-03	BUY	Market Buy	野村アセットマネジメント株式会社	other	18.6M	¥5,459	-4.9%	¥1.4B ($8.9M)
2026-06-03	SELL	unknown	ノムラインターナショナルピーエルシー NOMURA INTERNATIONAL PLC	other	392.2K	¥5,459	+4.9%	¥15.5B ($99.7M)
2026-06-03	BUY	Market Buy	野村證券株式会社	other	331.8K	¥5,459	-4.9%	¥793M ($5.1M)
2026-05-22	BUY	Market Buy	BlackRock Investment ManagementLimited UK	passive	772.3K	¥5,650	-6.8%	¥4.4B ($28.2M)
2026-05-22	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.	passive	4.7M	¥5,650	-6.8%	¥2.3B ($14.6M)
2026-05-22	BUY	Market Buy	ブラックロック・ファンド・アドバイザーズ	passive	8.0M	¥5,650	-6.8%	¥4.1B ($26.5M)
2026-05-22	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	passive	3.1M	¥5,650	-6.8%	¥205M ($1.3M)
2026-05-22	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	passive	369.4K	¥5,650	-6.8%	¥2.1B ($13.5M)
2026-05-22	SELL	Market Buy	BlackRock Fund Managers Limited	passive	1.1M	¥5,650	+6.8%	¥2.5B ($15.9M)
2026-05-22	BUY	Market Buy	BlackRockBV Netherlands	passive	647.1K	¥5,650	-6.8%	¥3.7B ($23.6M)
2026-05-22	BUY	Market Buy	BlackRock Financial Management,Inc.	passive	446.8K	¥5,650	-6.8%	¥2.5B ($16.3M)
2026-05-22	SELL	Market Buy	ブラックロック・ジャパン株式会社	passive	7.7M	¥5,650	+6.8%	¥3.9B ($25.1M)
2026-03-19	SELL	negotiated	アモーヴァ・アセットマネジメント株式会社	other	9.4M	¥6,976	+12.5%	¥57.6B ($371.8M)
2026-03-19	BUY	negotiated	三井住友トラスト・アセットマネジメント株式会社	other	8.9M	¥6,976	-12.5%	¥54.5B ($351.5M)
2026-03-19	BUY	negotiated	三井住友信託銀行株式会社	strategic	3.8M	¥6,976	+12.5%	¥23.4B ($151.2M)
2026-02-19	SELL	negotiated	アモーヴァ・アセットマネジメント株式会社	other	9.7M	¥5,415	-12.8%	¥59.2B ($381.6M)
2026-02-19	SELL	negotiated	三井住友トラスト・アセットマネジメント株式会社	other	8.7M	¥5,415	-12.8%	¥53.2B ($343.4M)
2026-02-19	SELL	negotiated	三井住友信託銀行株式会社	strategic	3.8M	¥5,415	-12.8%	¥23.4B ($151.2M)
2026-02-05	SELL	negotiated	三井住友信託銀行株式会社 Sumitomo Mitsui Trust Bank,Limited	strategic	23.2M	¥5,011	-21.9%	¥6.2B ($39.9M)
2026-01-08	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.	other	0	¥4,849	-25.9%	-
2026-01-08	BUY	Market Buy	野村アセットマネジメント株式会社	other	18.4M	¥4,849	+25.9%	¥112.1B ($723.2M)
2026-01-08	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	3.2M	¥4,849	+25.9%	¥19.8B ($127.4M)
2026-01-08	SELL	Market Buy	野村證券株式会社	other	185.5K	¥4,849	-25.9%	¥1.1B ($7.3M)
2025-12-03	SELL	Market Buy	アイ・シェアーズ(デーエー)・アインツ・インベストメントアクティエンゲゼルシャフト・ミット・タイルゲゼルシャフツフェアメーゲンI Investmentaktiengesellschaft mit Teilgesellschaftsvermogen) iShares (DE	passive	0	¥4,380	-39.4%	-
2025-12-03	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	764.4K	¥4,380	+39.4%	¥4.7B ($30.1M)
2025-12-03	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	passive	4.3M	¥4,380	-39.4%	¥26.3B ($169.9M)
2025-12-03	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	7.3M	¥4,380	+39.4%	¥44.3B ($285.9M)
2025-12-03	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	3.1M	¥4,380	+39.4%	¥18.8B ($121.0M)
2025-12-03	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	1.5M	¥4,380	+39.4%	¥9.3B ($60.3M)
2025-12-03	BUY	Market Buy	ブラックロック(ネザーランド)BVBV) BlackRock (Netherlands	passive	656.5K	¥4,380	+39.4%	¥4.0B ($25.9M)
2025-12-03	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	333.5K	¥4,380	-39.4%	¥2.0B ($13.1M)
2025-12-03	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	passive	252.9K	¥4,380	-39.4%	¥1.5B ($10.0M)
2025-12-03	SELL	Market Buy	ブラックロック・ジャパン株式会社	passive	8.3M	¥4,380	-39.4%	¥50.9B ($328.1M)
2025-10-21	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	10.3M	¥4,391	+39.1%	¥956M ($6.2M)
2025-10-21	SELL	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	9.5M	¥4,391	-39.1%	¥319M ($2.1M)
2025-10-21	BUY	Market Buy	三井住友信託銀行株式会社 Sumitomo Mitsui Trust Bank,Limited	strategic	4.5M	¥4,391	+39.1%	¥19.7B ($127.4M)
2025-10-06	BUY	unknown	野村アセットマネジメント株式会社 Nomura Asset Management Co., Ltd.	other	17.4M	¥4,434	+37.7%	¥965M ($6.2M)
2025-10-06	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	38.0K	¥4,434	+37.7%	¥16.1B ($103.8M)
2025-10-06	SELL	unknown	ノムラインターナショナルピーエルシー NOMURA INTERNATIONAL PLC	other	-577.6K	¥4,434	-37.7%	¥15.3B ($98.6M)
2025-10-06	BUY	negotiated	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	10.1M	¥4,434	+37.7%	¥322M ($2.1M)
2025-10-06	SELL	negotiated	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	9.6M	¥4,434	-37.7%	¥4.5B ($29.1M)
2025-10-06	BUY	negotiated	三井住友信託銀行株式会社 Sumitomo Mitsui Trust Bank,Limited	strategic	4.5M	¥4,434	+37.7%	¥19.9B ($128.6M)
2025-10-06	BUY	unknown	野村證券株式会社 Nomura Securities Co.,Ltd.	other	2.6M	¥4,434	+37.7%	¥595.3B ($3.8B)
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	10.1M	¥4,776	+27.9%	¥2.1B ($13.4M)
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	10.6M	¥4,776	+27.9%	¥3.8B ($24.6M)
2025-09-19	BUY	Market Buy	三井住友信託銀行株式会社 Sumitomo Mitsui Trust Bank,Limited	strategic	4.5M	¥4,776	+27.9%	¥21.5B ($138.5M)
2025-07-07	SELL	unknown	野村アセットマネジメント株式会社 Nomura Asset Management Co., Ltd.	other	17.2M	¥4,706	-29.8%	¥9.6B ($61.7M)
2025-07-07	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	¥4,706	+29.8%	-
2025-07-07	BUY	unknown	野村證券株式会社 Nomura Securities Co.,Ltd.	other	1.2M	¥4,706	+29.8%	¥273.2B ($1.8B)

Showing the 50 most recent of 200 filings.

Frequently asked questions

Who has been buying Mitsui O.S.K. Lines, Ltd. stock?: 32 distinct investors have filed 128 disclosed large-shareholding filings in Mitsui O.S.K. Lines, Ltd. (9104), most recently on 2026-03-19. 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 Mitsui O.S.K. Lines, Ltd. have?: Mitsui O.S.K. Lines, Ltd. has 128 buy-side and 109 sell-side disclosures on record, covering ¥1.13T ($7.3B) in total reported value, spanning 2021-03-22 to 2026-03-19.
Where does StockDrifts get Mitsui O.S.K. Lines, 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 Mitsui O.S.K. Lines, Ltd.. For how StockDrifts scores these disclosures, see the Japan insider signal tier research, or browse every Japanese stock we track.