Who has been buying Nittoku Co., Ltd. stock?

17 distinct investors have filed 41 disclosed large-shareholding filings in Nittoku Co., Ltd. (6145), 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 Nittoku Co., Ltd. have?

Nittoku Co., Ltd. has 41 buy-side and 27 sell-side disclosures on record, covering ¥16.6B ($107.1M) in total reported value, spanning 2021-03-19 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.

Nittoku Co., Ltd. 6145

Company

NITTОKU株式会社Nittoku Co., Ltd.

Investors

Buys

Total Value

¥16.6B ($107.1M)

Avg Return

+5.70%

Last Filing

2026-02-20

Nittoku Co., Ltd. (6145) has 41 disclosed large-shareholding filings and 27 disclosed disposals on record, filed by 17 distinct investors. Together those filings cover ¥16.6B ($107.1M) in reported transaction value. The earliest filing StockDrifts holds for Nittoku Co., Ltd. is dated 2021-03-19; the most recent is 2026-02-20. Across these filings the average return since disclosure is +5.70%, 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
2026-11-10	BUY	Market Buy	グランサム、マヨ、ヴァンオッテルローアンドカンパニーエルエルシー(Grantham, Mayo, Van Otterloo & Co. LLC) Grantham, Mayo, Van Otterloo & Co. LLC	activist	1.3M	¥2,658	+0.0%	¥505M ($3.3M)
2026-10-28	BUY	Market Buy	グランサム、マヨ、ヴァンオッテルローアンドカンパニーエルエルシー(Grantham, Mayo, Van Otterloo & Co. LLC) Grantham, Mayo, Van Otterloo & Co. LLC	activist	1.1M	¥2,704	-1.7%	¥509M ($3.3M)
2026-10-21	BUY	Market Buy	グランサム、マヨ、ヴァンオッテルローアンドカンパニーエルエルシー(Grantham, Mayo, Van Otterloo & Co. LLC) Grantham, Mayo, Van Otterloo & Co. LLC	activist	921.2K	¥2,644	+0.5%	¥2.4B ($15.7M)
2026-02-20	SELL	unknown	みずほ信託銀行株式会社	strategic	110.6K	¥2,573	-3.3%	¥28M ($180K)
2026-02-20	SELL	unknown	アセットマネジメントOne株式会社	other	660.8K	¥2,573	-3.3%	¥452M ($2.9M)
2025-12-22	BUY	unknown	みずほ信託銀行株式会社	strategic	120.8K	¥2,418	+9.9%	¥96M ($621K)
2025-12-22	SELL	unknown	アセットマネジメントOne株式会社	other	836.4K	¥2,418	-9.9%	¥228M ($1.5M)
2025-12-22	SELL	unknown	アセットマネジメントOneインターナショナル Asset Management One International Ltd.	other	2.0K	¥2,418	-9.9%	¥57M ($367K)
2025-12-04	SELL	unknown	ベイリー・ギフォード・アンド・カンパニー(Baillie Gifford & Co) Baillie Gifford & Co	other	706.5K	¥2,300	-15.6%	¥500M ($3.2M)
2025-11-25	BUY	unknown	株式会社シティインデックスイレブンス	activist	100	¥2,280	-	-
2025-11-25	SELL	unknown	野村絢	activist	796.5K	¥2,280	-16.6%	¥858M ($5.5M)
2025-07-11	BUY	Market Buy	野村絢 Aya Nomura (Murakami family)	activist	1.2M	¥1,894	+40.3%	¥425M ($2.7M)
2025-07-11	BUY	Market Buy	株式会社シティインデックスイレブンス City Index Eleven Co., Ltd.	activist	100	¥1,894	-	-
2025-07-07	BUY	unknown	株式会社シティインデックスイレブンス City Index Eleven Co., Ltd.	activist	100	¥1,953	+36.1%	¥195K ($1K)
2025-07-07	BUY	unknown	野村絢 Aya Nomura (Murakami family)	activist	947.7K	¥1,953	+36.1%	¥1.9B ($11.9M)
2025-05-22	BUY	Market Buy	みずほ信託銀行株式会社 Mizuho Trust & Banking Co., Ltd.	strategic	81.0K	¥1,767	-	-
2025-05-22	SELL	Market Buy	みずほ証券株式会社 Mizuho Securities Co., Ltd.	other	14	¥1,767	-50.4%	¥3.5B ($22.7M)
2025-05-22	BUY	Market Buy	アセットマネジメントOne株式会社 Asset Management One Co., Ltd.	other	930.9K	¥1,767	+50.4%	¥99M ($640K)
2025-05-22	SELL	Market Buy	アセットマネジメントOneインターナショナル Asset Management One International Ltd.	other	25.5K	¥1,767	-50.4%	¥6M ($41K)
2025-04-07	BUY	unknown	みずほ信託銀行株式会社 Mizuho Trust & Banking Co., Ltd.	strategic	81.0K	¥1,800	-	-
2025-04-07	SELL	unknown	みずほ証券株式会社 Mizuho Securities Co., Ltd.	other	20.0K	¥1,800	-47.7%	¥700M ($4.5M)
2025-04-07	BUY	unknown	アセットマネジメントOne株式会社 Asset Management One Co., Ltd.	other	875.0K	¥1,800	+47.7%	¥49M ($315K)
2025-04-07	BUY	unknown	アセットマネジメントOneインターナショナル Asset Management One International Ltd.	other	29.8K	¥1,800	-	-
2025-03-24	BUY	Market Buy	みずほ証券株式会社 Mizuho Securities Co., Ltd.	other	408.6K	¥2,162	+22.9%	¥188M ($1.2M)
2025-03-24	BUY	Market Buy	みずほ信託銀行株式会社 Mizuho Trust & Banking Co., Ltd.	strategic	81.0K	¥2,162	-	-
2025-03-24	BUY	Market Buy	アセットマネジメントOne株式会社 Asset Management One Co., Ltd.	other	847.9K	¥2,162	+22.9%	¥215M ($1.4M)
2025-03-24	BUY	Market Buy	アセットマネジメントOneインターナショナル Asset Management One International Ltd.	other	29.8K	¥2,162	-	-
2025-03-07	BUY	Market Buy	みずほ証券株式会社 Mizuho Securities Co., Ltd.	other	322.3K	¥2,205	+20.5%	¥235M ($1.5M)
2025-03-07	BUY	Market Buy	みずほ信託銀行株式会社 Mizuho Trust & Banking Co., Ltd.	strategic	81.0K	¥2,205	-	-
2025-03-07	BUY	Market Buy	アセットマネジメントOne株式会社 Asset Management One Co., Ltd.	other	747.1K	¥2,205	+20.5%	¥311M ($2.0M)
2025-03-07	BUY	Market Buy	アセットマネジメントOneインターナショナル Asset Management One International Ltd.	other	29.8K	¥2,205	+20.5%	¥4M ($26K)
2025-02-07	BUY	unknown	みずほ証券株式会社 Mizuho Securities Co., Ltd.	other	215.9K	¥2,123	+25.2%	¥458M ($3.0M)
2025-02-07	BUY	unknown	みずほ信託銀行株式会社 Mizuho Trust & Banking Co., Ltd.	strategic	81.0K	¥2,123	+25.2%	¥172M ($1.1M)
2025-02-07	BUY	unknown	アセットマネジメントOne株式会社 Asset Management One Co., Ltd.	other	605.9K	¥2,123	+25.2%	¥1.3B ($8.3M)
2025-02-07	BUY	unknown	アセットマネジメントOneインターナショナル Asset Management One International Ltd.	other	27.8K	¥2,123	+25.2%	¥59M ($381K)
2024-12-27	BUY	unknown	株式会社シティインデックスイレブンス City Index Eleven Co., Ltd.	activist	100	¥2,024	-	-
2024-12-27	BUY	unknown	野村絢 Aya Nomura (Murakami family)	activist	902.8K	¥2,024	+31.3%	¥1.8B ($11.6M)
2024-12-17	SELL	Market Buy	スパークス・アセット・マネジメント株式会社 SPARX Asset Management Co., Ltd.	passive	618.4K	¥2,050	-29.7%	¥646M ($4.2M)
2024-11-15	SELL	negotiated	SMC株式会社 SMC CORPORATION	strategic	840.5K	¥1,829	-45.3%	¥712M ($4.6M)
2024-09-17	BUY	unknown	株式会社シティインデックスイレブンス City Index Eleven Co., Ltd.	activist	100	¥1,584	-	-
2024-09-17	BUY	unknown	野村絢 Aya Nomura (Murakami family)	activist	1.2M	¥1,584	+67.8%	¥364M ($2.3M)
2024-09-10	BUY	unknown	野村絢 Aya Nomura (Murakami family)	activist	931.6K	¥1,538	+72.8%	¥1.4B ($9.2M)
2024-09-10	BUY	unknown	株式会社シティインデックスイレブンス City Index Eleven Co., Ltd.	activist	100	¥1,538	+72.8%	¥154K ($992)
2024-07-05	BUY	unknown	みずほ信託銀行株式会社 Mizuho Trust & Banking Co., Ltd.	strategic	81.0K	¥1,825	-	-
2024-07-05	SELL	unknown	みずほ証券株式会社 Mizuho Securities Co., Ltd.	other	14	¥1,825	-45.6%	¥96M ($618K)
2024-07-05	BUY	unknown	アセットマネジメントOne株式会社 Asset Management One Co., Ltd.	other	712.0K	¥1,825	+45.6%	¥1.3B ($8.2M)
2024-07-04	BUY	Market Buy	シュローダー・インベストメント・マネジメント株式会社 Schroder Investment Management(Japan)Limited	passive	374.4K	¥1,829	+45.3%	¥670M ($4.3M)
2024-07-04	BUY	Market Buy	シュローダー・インベストメント・マネージメント・ノースアメリカ・リミテッド Schroder Investment Management North America Limited	passive	446.5K	¥1,829	-	-
2024-06-06	SELL	Market Buy	シュローダー・インベストメント・マネジメント株式会社 Schroder Investment Management(Japan)Limited	passive	855.0K	¥1,660	-60.1%	¥219M ($1.4M)
2024-06-06	SELL	Market Buy	シュローダー・インベストメント・マネージメント・ノースアメリカ・リミテッド Schroder Investment Management North America Limited	passive	446.5K	¥1,660	-60.1%	¥66M ($426K)

Showing the 50 most recent of 91 filings.

Frequently asked questions

Who has been buying Nittoku Co., Ltd. stock?: 17 distinct investors have filed 41 disclosed large-shareholding filings in Nittoku Co., Ltd. (6145), 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 Nittoku Co., Ltd. have?: Nittoku Co., Ltd. has 41 buy-side and 27 sell-side disclosures on record, covering ¥16.6B ($107.1M) in total reported value, spanning 2021-03-19 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.