Who has been buying OMRON Corporation stock?

21 distinct investors have filed 31 disclosed large-shareholding filings in OMRON Corporation (6645), 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 OMRON Corporation have?

OMRON Corporation has 31 buy-side and 29 sell-side disclosures on record, covering ¥159.0B ($1.0B) in total reported value, spanning 2021-09-06 to 2025-09-19.

Where does StockDrifts get OMRON 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.

OMRON Corporation 6645

Company

オムロン株式会社OMRON Corporation

Investors

Buys

Total Value

¥159.0B ($1.0B)

Avg Return

-12.71%

Last Filing

2025-09-19

OMRON Corporation (6645) has 31 disclosed large-shareholding filings and 29 disclosed disposals on record, filed by 21 distinct investors. Together those filings cover ¥159.0B ($1.0B) in reported transaction value. The earliest filing StockDrifts holds for OMRON Corporation is dated 2021-09-06; 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 -12.71%, 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	10.9M	¥3,953	+28.9%	¥734M ($4.7M)
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	5.8M	¥3,953	+28.9%	¥245M ($1.6M)
2025-09-04	BUY	unknown	日興アセットマネジメント株式会社 Nikko Asset Management Co.,Ltd.	other	10.7M	¥3,851	+32.3%	¥41.3B ($266.6M)
2025-09-04	SELL	unknown	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	5.8M	¥3,851	-32.3%	¥1.1B ($7.2M)
2025-09-03	BUY	Market Buy	野村アセットマネジメント株式会社 Nomura Asset Management Co., Ltd.	other	15.6M	¥3,847	+32.5%	¥4.1B ($26.6M)
2025-09-03	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	339.0K	¥3,847	+32.5%	¥1.3B ($8.4M)
2025-09-03	SELL	Market Buy	ブラックロック・インベストメント・マネジメント(ユーケー)リミテッドLimited) BlackRock Investment Management (UK	passive	150.8K	¥3,847	-32.5%	¥1.4B ($9.2M)
2025-09-03	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 BlackRock Institutional Trust Company, N.A.	passive	1.6M	¥3,847	-32.5%	¥2.5B ($15.9M)
2025-09-03	SELL	Market Buy	ブラックロック・ファンド・アドバイザーズ BlackRock Fund Advisors	passive	2.2M	¥3,847	-32.5%	¥5.3B ($34.3M)
2025-09-03	SELL	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	1.1M	¥3,847	-32.5%	¥4.4B ($28.2M)
2025-09-03	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	75.2K	¥3,847	+32.5%	¥30.6B ($197.6M)
2025-09-03	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	1.1M	¥3,847	-32.5%	¥2.5B ($16.4M)
2025-09-03	SELL	Market Buy	ブラックロック(ネザーランド)BVBV) BlackRock (Netherlands	passive	341.5K	¥3,847	-32.5%	¥1.3B ($8.7M)
2025-09-03	SELL	Market Buy	ブラックロック・インベストメント・マネジメント (オーストラリア)リミテッドLimited) BlackRock Investment Management (Australia	passive	1.1K	¥3,847	-32.5%	¥1.0B ($6.7M)
2025-09-03	SELL	Market Buy	アペリオ・グループ・エルエルシー(Aperio Group Aperio Group, LLC	passive	166.0K	¥3,847	-32.5%	¥635M ($4.1M)
2025-09-03	SELL	Market Buy	ブラックロック・ジャパン株式会社 BlackRock Japan Co., Ltd.	passive	4.5M	¥3,847	-32.5%	¥793M ($5.1M)
2025-09-03	SELL	Market Buy	野村證券株式会社 Nomura Securities Co.,Ltd.	other	80.7K	¥3,847	-32.5%	¥428.4B ($2.8B)
2025-08-22	BUY	unknown	野村アセットマネジメント株式会社 Nomura Asset Management Co., Ltd.	other	14.5M	¥3,783	+34.7%	¥54.2B ($349.4M)
2025-08-22	BUY	unknown	野村證券株式会社 Nomura Securities Co.,Ltd.	other	1.2M	¥3,783	+34.7%	¥4.5B ($29.1M)
2025-07-22	SELL	unknown	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	218.9K	¥3,664	-39.1%	¥76M ($488K)
2025-07-22	BUY	unknown	三菱UFJアセットマネジメント株式会社 Mitsubishi UFJ Financial Group Inc.	passive	4.3M	¥3,664	+39.1%	¥1.7B ($11.2M)
2025-07-22	SELL	unknown	三菱UFJ信託銀行株式会社 Mitsubishi UFJ Financial Group Inc.	passive	4.2M	¥3,664	-39.1%	¥2.6B ($16.6M)
2025-07-22	BUY	Market Buy	日興アセットマネジメント株式会社 Nikko Asset Management Co.,Ltd.	other	10.7M	¥3,664	+39.1%	¥7.6B ($49.2M)
2025-07-22	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	6.1M	¥3,664	-39.1%	¥756M ($4.9M)
2025-07-22	SELL	unknown	株式会社三菱UFJ銀行 Mitsubishi UFJ Financial Group Inc.	unknown	0	¥3,664	-39.1%	¥18.8B ($121.4M)
2025-04-04	BUY	Market Buy	日興アセットマネジメント株式会社 Nikko Asset Management Co.,Ltd.	other	8.6M	¥4,120	+23.7%	¥6.0B ($38.9M)
2025-04-04	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	6.3M	¥4,120	+23.7%	¥4.2B ($26.9M)
2024-11-06	BUY	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 BlackRock Financial Management, Inc.	passive	132.4K	¥5,928	-14.0%	¥713M ($4.6M)
2024-11-06	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	3.6M	¥5,928	-14.0%	¥34M ($221K)
2024-11-06	SELL	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	2.2M	¥5,928	+14.0%	¥9M ($55K)
2024-11-06	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	286.9K	¥5,928	-14.0%	¥4M ($24K)
2024-11-06	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	1.8M	¥5,928	-14.0%	¥55M ($355K)
2024-11-06	SELL	Market Buy	ブラックロック(ネザーランド)BVBV) BlackRock (Netherlands	passive	710.9K	¥5,928	+14.0%	¥17M ($110K)
2024-11-06	BUY	Market Buy	ブラックロック・インベストメント・マネジメント (オーストラリア)リミテッドLimited) BlackRock Investment Management (Australia	passive	274.0K	¥5,928	-14.0%	¥2M ($16K)
2024-11-06	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	125.3K	¥5,928	-14.0%	¥715M ($4.6M)
2024-11-06	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	520.0K	¥5,928	-14.0%	¥3.1B ($19.9M)
2024-11-06	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	2.3M	¥5,928	+14.0%	¥66M ($426K)
2024-11-06	BUY	Market Buy	ブラックロック・ジャパン株式会社 BlackRock Japan Co., Ltd.	passive	4.7M	¥5,928	-14.0%	¥6.5B ($41.8M)
2024-11-06	SELL	Market Buy	アペリオ・グループ・エルエルシー(Aperio Group Aperio Group, LLC	passive	337.7K	¥5,928	+14.0%	¥2M ($16K)
2024-07-29	BUY	negotiated	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	241.8K	¥5,430	-6.2%	¥1.3B ($8.5M)
2024-07-29	SELL	negotiated	三菱UFJアセットマネジメント株式会社 Mitsubishi UFJ Financial Group Inc.	passive	3.8M	¥5,430	+6.2%	¥1.9B ($12.3M)
2024-07-29	SELL	negotiated	三菱UFJ信託銀行株式会社 Mitsubishi UFJ Financial Group Inc.	passive	4.9M	¥5,430	+6.2%	¥7.5B ($48.4M)
2024-07-29	BUY	negotiated	株式会社三菱UFJ銀行 Mitsubishi UFJ Financial Group Inc.	strategic	5.1M	¥5,430	-6.2%	¥27.9B ($180.2M)
2023-11-07	SELL	unknown	日興アセットマネジメント株式会社 Nikko Asset Management Co.,Ltd.	other	7.2M	¥5,780	+11.8%	¥6.6B ($42.3M)
2023-11-07	SELL	unknown	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	5.3M	¥5,780	+11.8%	¥6.8B ($43.8M)
2023-10-16	BUY	negotiated	三菱UFJアセットマネジメント株式会社 Mitsubishi UFJ Financial Group Inc.	passive	4.2M	¥6,299	-19.1%	¥909M ($5.9M)
2023-10-16	SELL	negotiated	三菱UFJ信託銀行株式会社 Mitsubishi UFJ Financial Group Inc.	passive	6.2M	¥6,299	+19.1%	¥2.5B ($15.9M)
2023-10-16	BUY	negotiated	株式会社三菱UFJ銀行 Mitsubishi UFJ Financial Group Inc.	strategic	5.1M	¥6,299	-19.1%	¥32.4B ($209.0M)
2022-12-19	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	87.1K	¥6,727	-24.3%	¥46.2B ($298.1M)
2022-12-19	BUY	Market Buy	株式会社三菱UFJ銀行 Mitsubishi UFJ Financial Group Inc.	strategic	5.1M	¥6,727	-24.3%	¥1.2B ($8.1M)

Showing the 50 most recent of 73 filings.

Frequently asked questions

Who has been buying OMRON Corporation stock?: 21 distinct investors have filed 31 disclosed large-shareholding filings in OMRON Corporation (6645), 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 OMRON Corporation have?: OMRON Corporation has 31 buy-side and 29 sell-side disclosures on record, covering ¥159.0B ($1.0B) in total reported value, spanning 2021-09-06 to 2025-09-19.
Where does StockDrifts get OMRON 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 OMRON Corporation. For how StockDrifts scores these disclosures, see the Japan insider signal tier research, or browse every Japanese stock we track.