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

9 distinct investors have filed 14 disclosed large-shareholding filings in JASTEC Co., Ltd. (9717), most recently on 2024-06-07. 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 JASTEC Co., Ltd. have?

JASTEC Co., Ltd. has 14 buy-side and 7 sell-side disclosures on record, covering ¥33.5B ($216.1M) in total reported value, spanning 2021-09-24 to 2024-06-07.

Where does StockDrifts get JASTEC 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.

JASTEC Co., Ltd. 9717

Company

株式会社ジャステックJASTEC Co., Ltd.

Investors

Buys

Total Value

¥33.5B ($216.1M)

Avg Return

+4.60%

Last Filing

2024-06-07

JASTEC Co., Ltd. (9717) has 14 disclosed large-shareholding filings and 7 disclosed disposals on record, filed by 9 distinct investors. Together those filings cover ¥33.5B ($216.1M) in reported transaction value. The earliest filing StockDrifts holds for JASTEC Co., Ltd. is dated 2021-09-24; the most recent is 2024-06-07. 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 +4.60%, 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
2024-06-07	BUY	unknown	野村アセットマネジメント株式会社 Nomura Asset Management Co., Ltd.	other	374.4K	¥1,933.85	+0.0%	¥11M ($68K)
2024-06-07	BUY	unknown	ノムラインターナショナルピーエルシー NOMURA INTERNATIONAL PLC	other	43.0K	¥1,933.85	+0.0%	¥69M ($444K)
2024-06-07	SELL	unknown	アセットマネジメントOne株式会社 Asset Management One Co., Ltd.	other	55.9K	¥1,933.85	-0.0%	¥258M ($1.7M)
2024-06-07	BUY	unknown	みずほ証券株式会社 Mizuho Securities Co., Ltd.	other	163.9K	¥1,933.85	+0.0%	¥297M ($1.9M)
2024-06-07	BUY	unknown	野村證券株式会社 Nomura Securities Co.,Ltd.	other	1.8K	¥1,933.85	+0.0%	¥42M ($274K)
2024-05-30	SELL	subscription	有限会社サスヤマ Sasyama Co., Ltd.	other	0	¥1,933.85	-0.0%	¥2.3B ($15.0M)
2024-05-30	SELL	subscription	神山茂 Shigeru Kamiyama	other	0	¥1,933.85	-0.0%	¥5.7B ($36.8M)
2024-05-29	BUY	subscription	株式会社NTTデータ NTT DATA JAPAN CORPORATION	activist	15.3M	¥1,936.84	-0.1%	¥29.6B ($190.9M)
2024-05-21	SELL	Market Buy	野村アセットマネジメント株式会社 Nomura Asset Management Co., Ltd.	other	368.6K	¥1,937.84	+0.2%	¥322M ($2.1M)
2024-05-21	BUY	Market Buy	ノムラインターナショナルピーエルシー NOMURA INTERNATIONAL PLC	other	833.9K	¥1,937.84	-0.2%	¥574M ($3.7M)
2024-05-21	BUY	Market Buy	野村證券株式会社 Nomura Securities Co.,Ltd.	other	161.2K	¥1,937.84	-0.2%	¥14M ($91K)
2024-05-09	BUY	unknown	みずほ証券株式会社 Mizuho Securities Co., Ltd.	other	1.1M	¥1,940.84	-0.3%	¥2.2B ($14.1M)
2024-05-09	BUY	unknown	アセットマネジメントOne株式会社 Asset Management One Co., Ltd.	other	191.0K	¥1,940.84	-0.3%	¥371M ($2.4M)
2024-04-22	BUY	unknown	野村アセットマネジメント株式会社 Nomura Asset Management Co., Ltd.	other	535.2K	¥1,936.84	-0.1%	¥1.0B ($6.7M)
2024-04-22	BUY	unknown	ノムラインターナショナルピーエルシー NOMURA INTERNATIONAL PLC	other	538.1K	¥1,936.84	-0.1%	¥1.0B ($6.7M)
2024-04-22	BUY	unknown	野村證券株式会社 Nomura Securities Co.,Ltd.	other	153.4K	¥1,936.84	-0.1%	¥297M ($1.9M)
2024-04-22	SELL	unknown	エフエムアールエルエルシー(FMR LLC) FMR LLC	other	361.7K	¥1,936.84	+0.1%	¥1.5B ($9.7M)
2024-04-12	BUY	subscription	有限会社サスヤマ Sasyama Co., Ltd.	other	1.2M	¥1,936.84	-0.1%	¥2.3B ($15.0M)
2024-04-12	SELL	subscription	神山茂 Shigeru Kamiyama	other	3.0M	¥1,936.84	+0.1%	¥290M ($1.9M)
2024-03-07	BUY	Market Buy	エフエムアールエルエルシー(FMR LLC) FMR LLC	other	1.1M	¥1,403.89	+37.8%	¥308M ($2.0M)
2023-12-07	BUY	unknown	エフエムアールエルエルシー(FMR LLC) FMR LLC	other	915.5K	¥1,507.88	+28.3%	¥1.4B ($8.9M)
2021-09-24	SELL	unknown	エフエムアールエルエルシー(FMR LLC) FMR LLC	other	794.0K	¥1,274.9	-51.7%	¥303M ($2.0M)

Frequently asked questions

Who has been buying JASTEC Co., Ltd. stock?: 9 distinct investors have filed 14 disclosed large-shareholding filings in JASTEC Co., Ltd. (9717), most recently on 2024-06-07. 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 JASTEC Co., Ltd. have?: JASTEC Co., Ltd. has 14 buy-side and 7 sell-side disclosures on record, covering ¥33.5B ($216.1M) in total reported value, spanning 2021-09-24 to 2024-06-07.
Where does StockDrifts get JASTEC 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 JASTEC Co., Ltd.. For how StockDrifts scores these disclosures, see the Japan insider signal tier research, or browse every Japanese stock we track.