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

5 distinct investors have filed 16 disclosed large-shareholding filings in NCD Co., Ltd. (4783), 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 NCD Co., Ltd. have?

NCD Co., Ltd. has 16 buy-side and 5 sell-side disclosures on record, covering ¥1.4B ($9.3M) in total reported value, spanning 2021-05-13 to 2026-03-19.

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.

NCD Co., Ltd. 4783

Company

日本コンピュータ・ダイナミクス株式会社NCD Co., Ltd.

Investors

Buys

Total Value

¥1.4B ($9.3M)

Avg Return

+114.06%

Last Filing

2026-03-19

NCD Co., Ltd. (4783) has 16 disclosed large-shareholding filings and 5 disclosed disposals on record, filed by 5 distinct investors. Together those filings cover ¥1.4B ($9.3M) in reported transaction value. The earliest filing StockDrifts holds for NCD Co., Ltd. is dated 2021-05-13; the most recent is 2026-03-19. Across these filings the average return since disclosure is +114.06%, 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
2026-09-08	BUY	Market Buy	株式会社エスアイエル	passive	157.9K	¥2,624	+0.1%	¥9M ($55K)
2026-09-08	BUY	Market Buy	株式会社UH Partners 2	passive	39.7K	¥2,624	-	-
2026-09-08	BUY	Market Buy	光通信株式会社	passive	604.3K	¥2,624	+0.1%	¥30M ($193K)
2026-05-25	SELL	unknown	アセンダー・キャピタル・リミテッド(Ascender Capital Limited) Ascender Capital Limited	activist	446.3K	¥2,450	-7.3%	¥333M ($2.2M)
2026-03-19	BUY	Market Buy	光通信株式会社	passive	604.3K	¥2,904	-9.5%	¥99M ($638K)
2026-03-19	SELL	Market Buy	株式会社UH Partners 2	passive	40.7K	¥2,904	+9.5%	¥243M ($1.6M)
2026-03-19	BUY	Market Buy	株式会社エスアイエル	passive	157.9K	¥2,904	-9.5%	¥27M ($171K)
2026-03-03	SELL	unknown	アセンダー・キャピタル・リミテッド(Ascender Capital Limited) Ascender Capital Limited	activist	617.8K	¥3,360	+21.8%	¥423M ($2.7M)
2026-03-03	BUY	Market Buy	ミリ・キャピタル・マネジメント・エルエルシー (MIRI Capital Management LLC) MIRI Capital Management LLC	activist	739.7K	¥3,360	-21.8%	¥488M ($3.1M)
2026-02-06	BUY	Market Buy	ミリ・キャピタル・マネジメント・エルエルシー (MIRI Capital Management LLC) MIRI Capital Management LLC	activist	629.8K	¥3,265	-19.5%	¥287M ($1.9M)
2026-01-13	BUY	Market Buy	ミリ・キャピタル・マネジメント・エルエルシー (MIRI Capital Management LLC) MIRI Capital Management LLC	activist	541.7K	¥3,225	-18.5%	¥309M ($2.0M)
2026-01-05	BUY	unknown	ミリ・キャピタル・マネジメント・エルエルシー (MIRI Capital Management LLC) MIRI Capital Management LLC	activist	446.5K	¥3,120	-15.8%	¥1.4B ($9.0M)
2026-01-05	BUY	Market Buy	アセンダー・キャピタル・リミテッド(Ascender Capital Limited) Ascender Capital Limited	activist	743.3K	¥3,120	-15.8%	¥286M ($1.8M)
2025-12-11	BUY	Market Buy	アセンダー・キャピタル・リミテッド(Ascender Capital Limited) Ascender Capital Limited	activist	652.2K	¥2,767	-5.0%	¥246M ($1.6M)
2025-09-26	BUY	Market Buy	光通信株式会社 Hikari Tsushin K.K.	passive	604.3K	¥2,972	-	-
2025-09-26	SELL	Market Buy	株式会社UH Partners 2 UH Partners 2, Inc.	passive	131.7K	¥2,972	+11.6%	¥173M ($1.1M)
2025-09-26	BUY	Market Buy	株式会社エスアイエル SIL Co., Ltd.	passive	157.9K	¥2,972	-	-
2025-03-12	BUY	Market Buy	光通信株式会社 Hikari Tsushin K.K.	passive	604.3K	¥2,590	-	-
2025-03-12	SELL	Market Buy	株式会社UH Partners 2 UH Partners 2, Inc.	passive	190.5K	¥2,590	-1.5%	¥235M ($1.5M)
2025-03-12	BUY	Market Buy	株式会社エスアイエル SIL Co., Ltd.	passive	157.9K	¥2,590	-	-
2025-02-28	BUY	Market Buy	アセンダー・キャピタル・リミテッド(Ascender Capital Limited) Ascender Capital Limited	activist	563.4K	¥2,731	-3.8%	¥262M ($1.7M)
2025-02-14	BUY	unknown	アセンダー・キャピタル・リミテッド(Ascender Capital Limited) Ascender Capital Limited	activist	467.7K	¥2,486	+5.7%	¥1.2B ($7.5M)
2022-09-08	BUY	Market Buy	光通信株式会社 Hikari Tsushin K.K.	passive	604.3K	¥695	-	-
2022-09-08	BUY	Market Buy	株式会社UH Partners 2 UH Partners 2, Inc.	passive	281.0K	¥695	+278.1%	¥61M ($395K)
2022-09-08	BUY	Market Buy	株式会社エスアイエル SIL Co., Ltd.	passive	157.9K	¥695	-	-
2022-05-24	BUY	Market Buy	光通信株式会社 Hikari Tsushin K.K.	passive	604.3K	¥630	-	-
2022-05-24	BUY	Market Buy	株式会社UH Partners 2 UH Partners 2, Inc.	passive	193.0K	¥630	+317.1%	¥55M ($358K)
2022-05-24	BUY	Market Buy	株式会社エスアイエル SIL Co., Ltd.	passive	157.9K	¥630	-	-
2022-01-18	SELL	Market Buy	光通信株式会社 Hikari Tsushin K.K.	passive	604.3K	¥631	-316.5%	¥99M ($641K)
2022-01-18	BUY	Market Buy	株式会社UH Partners 2 UH Partners 2, Inc.	passive	104.3K	¥631	+316.5%	¥22M ($140K)
2022-01-18	BUY	Market Buy	株式会社エスアイエル SIL Co., Ltd.	passive	157.9K	¥631	-	¥100M ($643K)
2021-11-29	BUY	Market Buy	株式会社UH Partners 2 UH Partners 2, Inc.	passive	70.1K	¥677	+288.2%	¥12M ($77K)
2021-11-29	BUY	Market Buy	光通信株式会社 Hikari Tsushin K.K.	passive	762.2K	¥677	-	-
2021-10-11	BUY	Market Buy	株式会社UH Partners 2 UH Partners 2, Inc.	passive	52.9K	¥713	-	¥38M ($243K)
2021-10-11	BUY	Market Buy	光通信株式会社 Hikari Tsushin K.K.	passive	762.2K	¥713	+268.6%	¥28M ($178K)
2021-05-13	BUY	Market Buy	光通信株式会社 Hikari Tsushin K.K.	passive	723.0K	¥608	+332.2%	¥54M ($349K)

Frequently asked questions

Who has been buying NCD Co., Ltd. stock?: 5 distinct investors have filed 16 disclosed large-shareholding filings in NCD Co., Ltd. (4783), 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 NCD Co., Ltd. have?: NCD Co., Ltd. has 16 buy-side and 5 sell-side disclosures on record, covering ¥1.4B ($9.3M) in total reported value, spanning 2021-05-13 to 2026-03-19.
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.