Who has been buying System Information Co.,Ltd. stock?

10 distinct investors have filed 8 disclosed large-shareholding filings in System Information Co.,Ltd. (3677), most recently on 2023-11-21. 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 System Information Co.,Ltd. have?

System Information Co.,Ltd. has 8 buy-side and 16 sell-side disclosures on record, covering ¥2.8B ($17.9M) in total reported value, spanning 2021-05-20 to 2023-11-21.

Where does StockDrifts get System Information 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.

System Information Co.,Ltd. 3677

Company

株式会社システム情報System Information Co.,Ltd.

Investors

Buys

Total Value

¥2.8B ($17.9M)

Avg Return

-0.45%

Last Filing

2023-11-21

System Information Co.,Ltd. (3677) has 8 disclosed large-shareholding filings and 16 disclosed disposals on record, filed by 10 distinct investors. Together those filings cover ¥2.8B ($17.9M) in reported transaction value. The earliest filing StockDrifts holds for System Information Co.,Ltd. is dated 2021-05-20; the most recent is 2023-11-21. 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 -0.45%, 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
2023-11-21	BUY	unknown	ノムラインターナショナルピーエルシー NOMURA INTERNATIONAL PLC	other	28.6K	¥927	+0.0%	¥20M ($127K)
2023-11-21	BUY	unknown	野村アセットマネジメント株式会社 Nomura Asset Management Co., Ltd.	other	472.9K	¥927	+0.0%	¥44M ($283K)
2023-11-21	SELL	unknown	野村證券株式会社 Nomura Securities Co.,Ltd.	other	40.1K	¥927	+0.0%	¥2M ($14K)
2023-11-17	BUY	unknown	一般財団法人松原奨学財団 Matsubara Scholarship Foundation	other	1.0M	¥927	+0.0%	¥927M ($6.0M)
2023-11-17	BUY	unknown	株式会社エイチエムティ HMT Co., Ltd.	strategic	2.6M	¥927	+0.0%	¥2.4B ($15.7M)
2023-11-17	BUY	unknown	一般財団法人松原奨学財団 Matsubara Scholarship Foundation	unknown	1.0M	¥927	+0.0%	¥927M ($6.0M)
2023-11-17	BUY	acquisition	一般財団法人松原奨学財団 Matsubara Scholarship Foundation	unknown	1.0M	¥927	+0.0%	¥927M ($6.0M)
2023-11-17	BUY	acquisition	株式会社BCJ-76 K.K. BCJ-76	activist	16.4M	¥927	+0.0%	¥12.7B ($82.1M)
2023-11-17	BUY	unknown	株式会社BCJ-76 K.K. BCJ-76	activist	16.4M	¥927	+0.0%	¥15.2B ($97.8M)
2023-11-17	SELL	unknown	鈴木隆司 Takashi Suzuki	unknown	0	¥927	+0.0%	¥1.2B ($7.9M)
2023-11-17	SELL	unknown	松原春男 Haruo Matsubara	unknown	0	¥927	+0.0%	¥1.6B ($10.3M)
2023-11-16	SELL	unknown	東京中小企業投資育成株式会社 TOKYO SMALL AND MEDIUM BUSINESS INVESTMENT & CONSULTATION CO.,LTD	unknown	0	¥927	+0.0%	¥1.3B ($8.6M)
2023-10-18	BUY	unknown	野村アセットマネジメント株式会社 Nomura Asset Management Co., Ltd.	other	426.3K	¥928	-0.1%	¥396M ($2.6M)
2023-10-18	BUY	unknown	ノムラインターナショナルピーエルシー NOMURA INTERNATIONAL PLC	other	717.5K	¥928	-0.1%	¥666M ($4.3M)
2023-10-18	BUY	unknown	野村證券株式会社 Nomura Securities Co.,Ltd.	other	41.8K	¥928	-0.1%	¥39M ($250K)
2023-10-04	BUY	unknown	松原春男 Haruo Matsubara	strategic	1.7M	¥927	+0.0%	¥1.6B ($10.3M)
2023-10-04	SELL	unknown	株式会社エイチエムティ HMT Co., Ltd.	strategic	2.6M	¥927	+0.0%	¥31M ($198K)
2023-10-04	SELL	unknown	鈴木隆司 Takashi Suzuki	activist	1.3M	¥927	+0.0%	¥195M ($1.3M)
2023-06-05	SELL	Market Buy	グランジャー・ピーク・グローバル・アドバイザーズ・エルエルシー(Grandeur Peak Global Advisors, LLC) Grandeur Peak Global Advisors, LLC	passive	946.8K	¥740	-25.3%	¥175M ($1.1M)
2022-10-12	BUY	Market Buy	グランジャー・ピーク・グローバル・アドバイザーズ・エルエルシー (Grandeur Peak Global Advisors, LLC) Grandeur Peak Global Advisors, LLC	passive	1.2M	¥958	-3.2%	¥1.1B ($7.3M)
2022-06-17	SELL	unknown	株式会社エイチエムティ HMT Co., Ltd.	strategic	2.7M	¥936	+1.0%	¥9M ($57K)
2022-06-17	SELL	unknown	株式会社エイチエムティ HMT Co., Ltd.	strategic	2.7M	¥936	+1.0%	¥9M ($57K)
2022-06-17	SELL	unknown	松原春男 Haruo Matsubara	strategic	1.7M	¥936	+1.0%	¥235M ($1.5M)
2022-06-17	SELL	unknown	松原春男 Haruo Matsubara	strategic	1.7M	¥936	+1.0%	¥235M ($1.5M)
2021-05-25	SELL	unknown	株式会社エイチエムティ HMT Co., Ltd.	strategic	2.7M	¥947	+2.1%	¥96M ($622K)
2021-05-25	SELL	unknown	株式会社エイチエムティ HMT Co., Ltd.	strategic	2.7M	¥947	+2.1%	¥96M ($622K)
2021-05-25	SELL	unknown	松原春男 Haruo Matsubara	strategic	2.0M	¥947	+2.1%	¥188M ($1.2M)
2021-05-25	SELL	unknown	松原春男 Haruo Matsubara	strategic	2.0M	¥947	+2.1%	¥188M ($1.2M)
2021-05-20	SELL	Market Buy	東京中小企業投資育成株式会社 TOKYO SMALL AND MEDIUM BUSINESS INVESTMENT & CONSULTATION CO.,LTD	passive	1.4M	¥946	+2.0%	¥206M ($1.3M)

Frequently asked questions

Who has been buying System Information Co.,Ltd. stock?: 10 distinct investors have filed 8 disclosed large-shareholding filings in System Information Co.,Ltd. (3677), most recently on 2023-11-21. 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 System Information Co.,Ltd. have?: System Information Co.,Ltd. has 8 buy-side and 16 sell-side disclosures on record, covering ¥2.8B ($17.9M) in total reported value, spanning 2021-05-20 to 2023-11-21.
Where does StockDrifts get System Information 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 System Information Co.,Ltd.. For how StockDrifts scores these disclosures, see the Japan insider signal tier research, or browse every Japanese stock we track.