Who has been buying Densan System Holdings Co., Ltd. stock?

8 distinct investors have filed 21 disclosed large-shareholding filings in Densan System Holdings Co., Ltd. (4072), most recently on 2026-03-05. 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 Densan System Holdings Co., Ltd. have?

Densan System Holdings Co., Ltd. has 21 buy-side and 13 sell-side disclosures on record, covering ¥14.5B ($93.3M) in total reported value, spanning 2021-07-06 to 2026-03-05.

Where does StockDrifts get Densan System Holdings Co., 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.

Densan System Holdings Co., Ltd. 4072

Company

株式会社電算システムホールディングスDensan System Holdings Co., Ltd.

Investors

Buys

Total Value

¥14.5B ($93.3M)

Avg Return

+2.68%

Last Filing

2026-03-05

Densan System Holdings Co., Ltd. (4072) has 21 disclosed large-shareholding filings and 13 disclosed disposals on record, filed by 8 distinct investors. Together those filings cover ¥14.5B ($93.3M) in reported transaction value. The earliest filing StockDrifts holds for Densan System Holdings Co., Ltd. is dated 2021-07-06; the most recent is 2026-03-05. 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 +2.68%, 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
2026-03-05	SELL	Market Buy	株式会社十六銀行	unknown	0	¥2,965	-1.3%	-
2026-03-05	BUY	Market Buy	株式会社十六フィナンシャルグループ	strategic	1.4M	¥2,965	+1.3%	¥4.1B ($26.4M)
2026-01-15	BUY	unknown	ヒロタ株式会社 Hirota.co.ltd	strategic	890.1K	¥3,630	-17.2%	¥3.2B ($20.8M)
2025-12-26	BUY	unknown	ヒロタ株式会社 Hirota.co.ltd	strategic	100	¥3,635	-17.3%	¥3.2B ($20.9M)
2025-12-26	SELL	unknown	ヒロタ株式会社 HIROTA CO,. LTD	unknown	100	¥3,635	+17.3%	¥3.2B ($20.9M)
2025-12-26	BUY	negotiated	株式会社十六カード	strategic	15.0K	¥3,635	-17.3%	¥45M ($291K)
2025-12-26	BUY	negotiated	十六リース株式会社	strategic	15.0K	¥3,635	-17.3%	¥45M ($291K)
2025-12-26	BUY	negotiated	株式会社十六銀行	strategic	441.9K	¥3,635	-17.3%	¥1.3B ($8.6M)
2025-12-26	BUY	negotiated	株式会社十六フィナンシャルグループ	strategic	890.0K	¥3,635	-17.3%	¥2.7B ($17.3M)
2025-12-26	BUY	negotiated	株式会社十六カード	strategic	15.0K	¥3,635	-17.3%	¥45M ($291K)
2025-12-26	BUY	negotiated	十六リース株式会社	strategic	15.0K	¥3,635	-17.3%	¥45M ($291K)
2025-12-26	BUY	negotiated	株式会社十六銀行	strategic	441.9K	¥3,635	-17.3%	¥1.3B ($8.6M)
2025-12-26	BUY	negotiated	株式会社十六フィナンシャルグループ	strategic	890.0K	¥3,635	-17.3%	¥2.7B ($17.3M)
2023-04-19	BUY	unknown	野村アセットマネジメント株式会社 Nomura Asset Management Co., Ltd.	other	285.4K	¥2,660	+13.0%	¥759M ($4.9M)
2023-04-19	SELL	unknown	ノムラインターナショナルピーエルシー NOMURA INTERNATIONAL PLC	other	55.5K	¥2,660	-13.0%	¥235M ($1.5M)
2023-04-19	SELL	unknown	野村證券株式会社 Nomura Securities Co.,Ltd.	other	123.8K	¥2,660	-13.0%	¥92M ($593K)
2023-02-20	SELL	unknown	野村證券株式会社 Nomura Securities Co.,Ltd.	other	159.1K	¥2,507	-19.9%	¥384M ($2.5M)
2023-02-20	BUY	unknown	野村アセットマネジメント株式会社 Nomura Asset Management Co., Ltd.	other	284.5K	¥2,507	+19.9%	¥713M ($4.6M)
2023-02-20	BUY	unknown	ノムラインターナショナルピーエルシー NOMURA INTERNATIONAL PLC	other	143.8K	¥2,507	+19.9%	¥333M ($2.1M)
2023-01-10	BUY	unknown	野村アセットマネジメント株式会社 Nomura Asset Management Co., Ltd.	other	284.6K	¥2,083	+44.3%	¥47M ($305K)
2023-01-10	SELL	unknown	ノムラインターナショナルピーエルシー NOMURA INTERNATIONAL PLC	other	11.3K	¥2,083	-44.3%	¥153M ($986K)
2023-01-10	SELL	unknown	野村證券株式会社 Nomura Securities Co.,Ltd.	other	311.9K	¥2,083	-44.3%	¥121M ($783K)
2022-06-21	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	262.3K	¥2,222	+35.2%	¥29M ($186K)
2022-06-21	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	84.6K	¥2,222	-35.2%	¥144M ($928K)
2022-06-21	BUY	Market Buy	野村證券株式会社 Nomura Securities Co.,Ltd.	other	370.5K	¥2,222	+35.2%	¥113M ($727K)
2022-04-06	SELL	unknown	野村アセットマネジメント株式会社 Nomura Asset Management Co., Ltd.	other	249.5K	¥2,702	-11.2%	¥26M ($169K)
2022-04-06	SELL	unknown	ノムラインターナショナルピーエルシー NOMURA INTERNATIONAL PLC	other	149.2K	¥2,702	-11.2%	¥1.3B ($8.7M)
2022-04-06	SELL	unknown	野村證券株式会社 Nomura Securities Co.,Ltd.	other	319.0K	¥2,702	-11.2%	¥198M ($1.3M)
2022-01-07	BUY	unknown	野村證券株式会社 Nomura Securities Co.,Ltd.	other	392.8K	¥2,634	+14.1%	¥1.0B ($6.7M)
2022-01-07	BUY	unknown	野村アセットマネジメント株式会社 Nomura Asset Management Co., Ltd.	other	259.2K	¥2,634	+14.1%	¥683M ($4.4M)
2022-01-07	BUY	unknown	ノムラインターナショナルピーエルシー NOMURA INTERNATIONAL PLC	other	6.0K	¥2,634	+14.1%	¥795M ($5.1M)
2021-10-06	SELL	unknown	野村證券株式会社 Nomura Securities Co.,Ltd.	other	-524	¥2,603	-15.4%	¥576M ($3.7M)
2021-10-06	BUY	unknown	野村アセットマネジメント株式会社 Nomura Asset Management Co., Ltd.	other	259.2K	¥2,603	+15.4%	¥3M ($18K)
2021-10-06	BUY	unknown	ノムラインターナショナルピーエルシー NOMURA INTERNATIONAL PLC	other	345.4K	¥2,603	+15.4%	¥584M ($3.8M)
2021-09-21	BUY	unknown	野村アセットマネジメント株式会社 Nomura Asset Management Co., Ltd.	other	257.3K	¥2,955	+1.7%	¥3M ($21K)
2021-09-21	SELL	unknown	ノムラインターナショナルピーエルシー NOMURA INTERNATIONAL PLC	other	120.6K	¥2,955	-1.7%	¥653M ($4.2M)
2021-09-21	BUY	unknown	野村證券株式会社 Nomura Securities Co.,Ltd.	other	221.1K	¥2,955	+1.7%	¥653M ($4.2M)
2021-09-06	BUY	unknown	野村アセットマネジメント株式会社 Nomura Asset Management Co., Ltd.	other	256.7K	¥2,768	+8.6%	¥57M ($366K)
2021-09-06	BUY	unknown	ノムラインターナショナルピーエルシー NOMURA INTERNATIONAL PLC	other	341.5K	¥2,768	+8.6%	¥945M ($6.1M)
2021-07-20	BUY	unknown	野村アセットマネジメント株式会社 Nomura Asset Management Co., Ltd.	other	236.3K	¥2,957	+1.6%	¥699M ($4.5M)
2021-07-20	BUY	unknown	ノムラインターナショナルピーエルシー NOMURA INTERNATIONAL PLC	other	341.4K	¥2,957	+1.6%	¥1.0B ($6.5M)
2021-07-06	BUY	unknown	ヒロタ株式会社 Hirota.co.ltd	strategic	890.1K	¥2,991	+0.5%	¥2.7B ($17.2M)
2021-07-06	BUY	unknown	ヒロタ株式会社 Hirota.co.ltd	strategic	890.1K	¥2,991	+0.5%	¥2.7B ($17.2M)

Frequently asked questions

Who has been buying Densan System Holdings Co., Ltd. stock?: 8 distinct investors have filed 21 disclosed large-shareholding filings in Densan System Holdings Co., Ltd. (4072), most recently on 2026-03-05. 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 Densan System Holdings Co., Ltd. have?: Densan System Holdings Co., Ltd. has 21 buy-side and 13 sell-side disclosures on record, covering ¥14.5B ($93.3M) in total reported value, spanning 2021-07-06 to 2026-03-05.
Where does StockDrifts get Densan System Holdings Co., 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 Densan System Holdings Co., Ltd.. For how StockDrifts scores these disclosures, see the Japan insider signal tier research, or browse every Japanese stock we track.