Who has been buying EcoNaviSta, Inc. stock?

11 distinct investors have filed 22 disclosed large-shareholding filings in EcoNaviSta, Inc. (5585), most recently on 2025-06-03. 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 EcoNaviSta, Inc. have?

EcoNaviSta, Inc. has 22 buy-side and 24 sell-side disclosures on record, covering ¥33.6B ($216.9M) in total reported value, spanning 2023-07-27 to 2025-06-03.

Where does StockDrifts get EcoNaviSta, Inc. 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.

EcoNaviSta, Inc. 5585

Company

エコナビスタ株式会社EcoNaviSta, Inc.

Investors

Buys

Total Value

¥33.6B ($216.9M)

Avg Return

-6.89%

Last Filing

2025-06-03

EcoNaviSta, Inc. (5585) has 22 disclosed large-shareholding filings and 24 disclosed disposals on record, filed by 11 distinct investors. Together those filings cover ¥33.6B ($216.9M) in reported transaction value. The earliest filing StockDrifts holds for EcoNaviSta, Inc. is dated 2023-07-27; the most recent is 2025-06-03. 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 -6.89%, 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
2025-06-03	BUY	unknown	エーザイ株式会社 Eisai Co., Ltd.	activist	7.3M	¥2,184	+0.0%	¥15.2B ($98.1M)
2025-06-03	SELL	unknown	エーザイ株式会社 Eisai Co., Ltd.	activist	7.3M	¥2,184	+0.0%	¥15.2B ($98.1M)
2025-05-22	SELL	unknown	みずほ証券株式会社 Mizuho Securities Co., Ltd.	other	1.1K	¥2,183	-0.1%	¥582M ($3.8M)
2025-05-21	BUY	unknown	ノムラインターナショナルピーエルシー(NOMURA INTERNATIONAL PLC) NOMURA INTERNATIONAL PLC	other	34.8K	¥2,181	+0.1%	¥6.1B ($39.2M)
2025-05-13	BUY	subscription	エーザイ株式会社 Eisai Co., Ltd.	activist	7.1M	¥2,187	-0.1%	¥15.5B ($100.1M)
2025-05-12	SELL	unknown	株式会社GMS GMS Co., Ltd.	unknown	0	¥2,187	+0.1%	¥9.3B ($60.3M)
2025-05-12	SELL	unknown	東京瓦斯株式会社 TOKYO GAS CO.,LTD.	unknown	0	¥2,187	+0.1%	¥1.5B ($9.7M)
2025-05-12	SELL	unknown	株式会社ココアアセット CocoaAsset Inc.	unknown	0	¥2,187	+0.1%	¥4.9B ($31.9M)
2025-05-12	SELL	unknown	渡邉君人 WATANABE Kimihito	unknown	0	¥2,187	+0.1%	¥1.5B ($10.0M)
2025-05-09	SELL	unknown	ヒューリック株式会社 Hulic Co.,Ltd.	unknown	0	¥2,186	+0.1%	¥1.6B ($10.4M)
2025-04-22	BUY	unknown	みずほ証券株式会社 Mizuho Securities Co., Ltd.	other	372.6K	¥2,188	-0.2%	¥212M ($1.4M)
2025-04-22	SELL	Market Buy	野村アセットマネジメント株式会社 Nomura Asset Management Co., Ltd.	unknown	0	¥2,188	+0.2%	¥543M ($3.5M)
2025-04-22	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	636.3K	¥2,188	-0.2%	¥854M ($5.5M)
2025-04-22	SELL	unknown	アセットマネジメントOne株式会社 Asset Management One Co., Ltd.	other	3.9K	¥2,188	+0.2%	¥653M ($4.2M)
2025-04-07	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	245.4K	¥2,184	+0.0%	¥489M ($3.2M)
2025-04-07	BUY	Market Buy	みずほ証券株式会社 Mizuho Securities Co., Ltd.	other	253.6K	¥2,184	+0.0%	¥554M ($3.6M)
2025-04-07	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	248.3K	¥2,184	+0.0%	¥217M ($1.4M)
2025-04-07	BUY	Market Buy	野村證券株式会社 Nomura Securities Co.,Ltd.	other	6.2K	¥2,184	+0.0%	¥1.0B ($6.5M)
2025-04-07	SELL	Market Buy	アセットマネジメントOne株式会社 Asset Management One Co., Ltd.	other	277.7K	¥2,184	+0.0%	¥426M ($2.7M)
2025-03-27	SELL	unknown	渡邉君人 WATANABE Kimihito	activist	700.0K	¥2,183	-0.1%	¥53M ($341K)
2025-03-24	SELL	unknown	アセットマネジメントOne株式会社 Asset Management One Co., Ltd.	other	473.1K	¥2,183	-0.1%	¥256M ($1.7M)
2025-03-21	SELL	unknown	株式会社GMS GMS Co., Ltd.	activist	39.0K	¥2,183	-0.1%	¥13M ($83K)
2025-03-21	SELL	unknown	株式会社GMS GMS Co., Ltd.	activist	39.0K	¥2,183	-0.1%	¥13M ($83K)
2025-03-21	SELL	unknown	株式会社ココアアセット CocoaAsset Inc.	activist	2.1M	¥2,183	-0.1%	¥627M ($4.0M)
2025-03-21	SELL	unknown	ヒューリック株式会社 Hulic Co.,Ltd.	strategic	672.8K	¥2,183	-0.1%	¥206M ($1.3M)
2025-03-21	SELL	unknown	株式会社ココアアセット CocoaAsset Inc.	activist	2.1M	¥2,183	-0.1%	¥627M ($4.0M)
2025-03-21	SELL	unknown	東京瓦斯株式会社 TOKYO GAS CO.,LTD.	strategic	622.8K	¥2,183	-0.1%	¥190M ($1.2M)
2025-02-18	BUY	unknown	アセットマネジメントOne株式会社 Asset Management One Co., Ltd.	other	589.9K	¥1,456	+50.0%	¥850M ($5.5M)
2025-02-18	SELL	unknown	みずほ証券株式会社 Mizuho Securities Co., Ltd.	unknown	0	¥1,456	-50.0%	¥2.2B ($14.2M)
2025-01-09	BUY	unknown	野村アセットマネジメント株式会社 Nomura Asset Management Co., Ltd.	other	347.4K	¥1,453	+50.3%	¥505M ($3.3M)
2025-01-09	BUY	unknown	ノムラインターナショナルピーエルシー NOMURA INTERNATIONAL PLC	other	21.8K	¥1,453	+50.3%	¥32M ($204K)
2025-01-09	BUY	unknown	野村證券株式会社 Nomura Securities Co.,Ltd.	other	1.2K	¥1,453	+50.3%	¥2M ($11K)
2023-12-28	BUY	Market Buy	アセットマネジメントOne株式会社 Asset Management One Co., Ltd.	other	625.6K	¥3,140	-30.4%	¥411M ($2.7M)
2023-12-28	BUY	Market Buy	みずほ証券株式会社 Mizuho Securities Co., Ltd.	other	15.0K	¥3,140	-30.4%	¥6M ($39K)
2023-12-07	BUY	unknown	アセットマネジメントOne株式会社 Asset Management One Co., Ltd.	other	494.5K	¥2,920	-25.2%	¥215M ($1.4M)
2023-12-07	SELL	unknown	みずほ証券株式会社 Mizuho Securities Co., Ltd.	other	13.0K	¥2,920	+25.2%	¥2M ($12K)
2023-10-30	SELL	unknown	渡邉君人 WATANABE Kimihito	activist	700.0K	¥2,494	+12.4%	¥35M ($225K)
2023-10-30	BUY	unknown	渡邉君人 WATANABE Kimihito	activist	700.0K	¥2,494	-12.4%	¥113M ($730K)
2023-10-06	BUY	unknown	アセットマネジメントOne株式会社 Asset Management One Co., Ltd.	other	401.2K	¥3,100	-29.6%	¥259M ($1.7M)
2023-10-06	SELL	unknown	みずほ証券株式会社 Mizuho Securities Co., Ltd.	other	12.8K	¥3,100	+29.6%	¥17M ($110K)
2023-09-01	BUY	unknown	アセットマネジメントOne株式会社 Asset Management One Co., Ltd.	other	318.2K	¥2,759	-20.8%	¥10M ($65K)
2023-09-01	SELL	unknown	みずほ証券株式会社 Mizuho Securities Co., Ltd.	other	18.0K	¥2,759	+20.8%	¥869M ($5.6M)
2023-08-30	BUY	unknown	みずほ証券株式会社 Mizuho Securities Co., Ltd.	other	333.0K	¥2,643	-17.4%	¥880M ($5.7M)
2023-08-30	BUY	unknown	アセットマネジメントOne株式会社 Asset Management One Co., Ltd.	other	314.2K	¥2,643	-17.4%	¥830M ($5.4M)
2023-08-02	BUY	unknown	東京瓦斯株式会社 Tokyo Gas Co., Ltd.	strategic	622.8K	¥3,600	-39.3%	¥2.2B ($14.5M)
2023-08-01	BUY	unknown	渡邉君人 WATANABE Kimihito	activist	700.0K	¥3,355	-34.9%	¥2.3B ($15.2M)
2023-07-31	BUY	unknown	株式会社GMS GMS Co., Ltd.	activist	39.0K	¥3,500	-37.6%	¥137M ($881K)
2023-07-31	BUY	unknown	株式会社ココアアセット CocoaAsset Inc.	activist	2.1M	¥3,500	-37.6%	¥7.2B ($46.4M)
2023-07-27	BUY	unknown	ヒューリック株式会社 Hulic Co.,Ltd.	strategic	672.8K	¥3,190	-31.5%	¥2.1B ($13.8M)

Frequently asked questions

Who has been buying EcoNaviSta, Inc. stock?: 11 distinct investors have filed 22 disclosed large-shareholding filings in EcoNaviSta, Inc. (5585), most recently on 2025-06-03. 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 EcoNaviSta, Inc. have?: EcoNaviSta, Inc. has 22 buy-side and 24 sell-side disclosures on record, covering ¥33.6B ($216.9M) in total reported value, spanning 2023-07-27 to 2025-06-03.
Where does StockDrifts get EcoNaviSta, Inc. 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 EcoNaviSta, Inc.. For how StockDrifts scores these disclosures, see the Japan insider signal tier research, or browse every Japanese stock we track.