Who has been buying DAIHEN Corporation stock?

11 distinct investors have filed 19 disclosed large-shareholding filings in DAIHEN Corporation (6622), most recently on 2026-02-20. 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 DAIHEN Corporation have?

DAIHEN Corporation has 19 buy-side and 12 sell-side disclosures on record, covering ¥54.7B ($353.0M) in total reported value, spanning 2021-03-22 to 2026-02-20.

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.

DAIHEN Corporation 6622

Company

株式会社ダイヘンDAIHEN Corporation

Investors

Buys

Total Value

¥54.7B ($353.0M)

Avg Return

+86.43%

Last Filing

2026-02-20

DAIHEN Corporation (6622) has 19 disclosed large-shareholding filings and 12 disclosed disposals on record, filed by 11 distinct investors. Together those filings cover ¥54.7B ($353.0M) in reported transaction value. The earliest filing StockDrifts holds for DAIHEN Corporation is dated 2021-03-22; the most recent is 2026-02-20. Across these filings the average return since disclosure is +86.43%, 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
2026-07-23	BUY	Market Buy	みずほ証券株式会社	other	86.1K	¥15,020	-15.3%	¥75M ($483K)
2026-07-23	SELL	unknown	アセットマネジメントOne株式会社	other	884.4K	¥15,020	+15.3%	¥4.8B ($30.9M)
2026-06-22	BUY	Market Buy	三井住友DSアセットマネジメント株式会社	passive	1.2M	¥19,450	-34.6%	¥7.2B ($46.6M)
2026-06-22	BUY	unknown	株式会社三井住友銀行	other	542.9K	¥19,450	-	-
2026-06-05	BUY	Market Buy	野村證券株式会社	other	100.1K	¥16,200	-21.5%	¥1.2B ($7.5M)
2026-06-05	SELL	unknown	ノムラインターナショナルピーエルシー NOMURA INTERNATIONAL PLC	other	22.0K	¥16,200	+21.5%	¥202M ($1.3M)
2026-06-05	SELL	unknown	野村アセットマネジメント株式会社	other	1.1M	¥16,200	+21.5%	¥4.1B ($26.5M)
2026-02-20	BUY	Market Buy	三井住友DSアセットマネジメント株式会社	passive	794.2K	¥14,450	-12.0%	¥11.5B ($74.0M)
2026-02-20	BUY	Market Buy	株式会社三井住友銀行	other	542.9K	¥14,450	-12.0%	¥7.8B ($50.6M)
2025-12-05	BUY	unknown	みずほ証券株式会社	other	83.5K	¥9,490	+34.0%	¥792M ($5.1M)
2025-12-05	BUY	unknown	アセットマネジメントOne株式会社	other	1.2M	¥9,490	+34.0%	¥11.5B ($74.5M)
2025-12-05	SELL	unknown	株式会社三井住友銀行	other	542.9K	¥9,490	-34.0%	¥5.2B ($33.3M)
2025-12-05	BUY	unknown	SMBC日興証券株式会社	other	146.2K	¥9,490	-	¥1.4B ($8.9M)
2025-12-05	BUY	unknown	三井住友DSアセットマネジメント株式会社	passive	419.5K	¥9,490	+34.0%	¥2.2B ($14.2M)
2025-12-04	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	721.7K	¥9,280	-37.1%	¥351M ($2.3M)
2025-12-04	SELL	negotiated	アモーヴァ・アセットマネジメント株式会社	other	282.2K	¥9,280	-37.1%	¥23M ($151K)
2025-12-04	SELL	negotiated	三井住友信託銀行株式会社	strategic	328.6K	¥9,280	-37.1%	¥3.1B ($19.8M)
2025-10-06	SELL	unknown	野村アセットマネジメント株式会社 Nomura Asset Management Co., Ltd.	other	1.4M	¥8,520	-49.3%	¥2.4B ($15.8M)
2025-10-06	BUY	unknown	野村證券株式会社 Nomura Securities Co.,Ltd.	other	27.3K	¥8,520	-	¥233M ($1.5M)
2025-10-06	BUY	unknown	ノムラインターナショナルピーエルシー NOMURA INTERNATIONAL PLC	other	35.4K	¥8,520	-	¥302M ($1.9M)
2025-09-19	BUY	negotiated	三井住友信託銀行株式会社 Sumitomo Mitsui Trust Bank,Limited	strategic	658.6K	¥8,300	+53.3%	¥84M ($540K)
2025-09-19	SELL	negotiated	三井住友トラスト・アセットマネジメント株式会社 Sumitomo Mitsui Trust Asset Management Co.,Ltd.	other	757.5K	¥8,300	-53.3%	¥377M ($2.4M)
2025-09-19	SELL	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	284.1K	¥8,300	-53.3%	¥188M ($1.2M)
2025-04-22	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	400	¥5,810	-118.9%	¥67.4B ($434.6M)
2025-04-22	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	1.7M	¥5,810	+118.9%	¥1.6B ($10.4M)
2025-03-24	BUY	Market Buy	三井住友DSアセットマネジメント株式会社 Sumitomo Mitsui DS Asset Management Company, Limited	passive	185.4K	¥6,920	+83.8%	¥1.3B ($8.3M)
2025-03-24	BUY	Market Buy	株式会社三井住友銀行 Sumitomo Mitsui Banking Corporation	other	1.1M	¥6,920	+83.8%	¥7.5B ($48.5M)
2024-11-08	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	117.5K	¥7,260	-75.2%	¥44.6B ($287.8M)
2024-11-08	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	1.4M	¥7,260	+75.2%	¥2.1B ($13.6M)
2024-10-21	BUY	Market Buy	三井住友信託銀行株式会社 Sumitomo Mitsui Trust Bank,Limited	strategic	658.6K	¥6,470	+96.6%	¥232M ($1.5M)
2024-10-21	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	815.5K	¥6,470	+96.6%	¥1.2B ($7.5M)
2024-10-21	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	312.7K	¥6,470	+96.6%	¥480M ($3.1M)
2024-09-06	SELL	Market Buy	三井住友DSアセットマネジメント株式会社 Sumitomo Mitsui DS Asset Management Company, Limited	passive	172.7K	¥6,100	-108.5%	¥2.5B ($15.9M)
2024-09-06	BUY	Market Buy	株式会社三井住友銀行 Sumitomo Mitsui Banking Corporation	other	1.1M	¥6,100	+108.5%	¥359M ($2.3M)
2024-05-09	BUY	unknown	ノムラインターナショナルピーエルシー NOMURA INTERNATIONAL PLC	other	180.5K	¥9,930	+28.1%	¥1.8B ($11.6M)
2024-05-09	BUY	unknown	野村アセットマネジメント株式会社 Nomura Asset Management Co., Ltd.	other	1.1M	¥9,930	+28.1%	¥11.2B ($72.4M)
2022-11-07	BUY	negotiated	三井住友信託銀行株式会社 Sumitomo Mitsui Trust Bank,Limited	strategic	658.6K	¥3,885	-	-
2022-11-07	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	675.4K	¥3,885	-227.4%	¥663M ($4.3M)
2022-11-07	SELL	negotiated	日興アセットマネジメント株式会社 Nikko Asset Management Co.,Ltd.	other	252.8K	¥3,885	-227.4%	¥748M ($4.8M)
2021-07-21	BUY	negotiated	三井住友信託銀行株式会社 Sumitomo Mitsui Trust Bank,Limited	strategic	658.6K	¥4,775	-	-
2021-07-21	BUY	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	845.1K	¥4,775	+166.4%	¥738M ($4.8M)
2021-07-21	BUY	negotiated	日興アセットマネジメント株式会社 Nikko Asset Management Co.,Ltd.	other	443.5K	¥4,775	+166.4%	¥673M ($4.3M)
2021-03-22	SELL	Market Buy	三井住友DSアセットマネジメント株式会社 Sumitomo Mitsui DS Asset Management Company, Limited	passive	609.9K	¥4,218.391	-201.5%	¥1.7B ($10.7M)
2021-03-22	BUY	Market Buy	株式会社三井住友銀行 Sumitomo Mitsui Banking Corporation	other	1.1M	¥4,218.391	-	-

Frequently asked questions

Who has been buying DAIHEN Corporation stock?: 11 distinct investors have filed 19 disclosed large-shareholding filings in DAIHEN Corporation (6622), most recently on 2026-02-20. 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 DAIHEN Corporation have?: DAIHEN Corporation has 19 buy-side and 12 sell-side disclosures on record, covering ¥54.7B ($353.0M) in total reported value, spanning 2021-03-22 to 2026-02-20.
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.