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

7 distinct investors have filed 8 disclosed large-shareholding filings in Tripleize Co.,Ltd. (5026), most recently on 2025-05-26. 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 Tripleize Co.,Ltd. have?

Tripleize Co.,Ltd. has 8 buy-side and 8 sell-side disclosures on record, covering ¥9.4B ($60.6M) in total reported value, spanning 2022-06-02 to 2025-05-26.

Where does StockDrifts get Tripleize 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.

Tripleize Co.,Ltd. 5026

Company

株式会社トリプルアイズTripleize Co.,Ltd.

Investors

Buys

Total Value

¥9.4B ($60.6M)

Avg Return

-58.23%

Last Filing

2025-05-26

Tripleize Co.,Ltd. (5026) has 8 disclosed large-shareholding filings and 8 disclosed disposals on record, filed by 7 distinct investors. Together those filings cover ¥9.4B ($60.6M) in reported transaction value. The earliest filing StockDrifts holds for Tripleize Co.,Ltd. is dated 2022-06-02; the most recent is 2025-05-26. 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 -58.23%, 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
2026-07-31	SELL	private	JPE第1号株式会社 JPE No.1 Co.,Ltd.	passive	341.1K	¥562	-5.0%	¥85M ($550K)
2025-05-26	SELL	unknown	福原聖子 Seiko Fukuhara	strategic	2.3M	¥988	+39.3%	¥47M ($305K)
2025-05-26	SELL	unknown	株式会社コスモウエア CosmoWare Inc.	strategic	1.8M	¥988	+39.3%	¥7M ($43K)
2025-05-26	SELL	unknown	福原聖子 Seiko Fukuhara	strategic	2.3M	¥988	+39.3%	¥47M ($305K)
2025-02-27	SELL	Market Buy	トラストアップ株式会社 Trust Up Inc.	passive	372.2K	¥1,218	+50.7%	¥104M ($671K)
2025-02-03	SELL	Market Buy	トラストアップ株式会社 Trust Up Inc.	passive	372.2K	¥1,155	+48.0%	¥99M ($636K)
2024-10-18	SELL	unknown	福原聖子 Seiko Fukuhara	strategic	2.3M	¥1,437	+58.3%	¥773M ($5.0M)
2024-10-18	SELL	unknown	株式会社コスモウエア CosmoWare Inc.	strategic	1.8M	¥1,437	+58.3%	¥589M ($3.8M)
2024-09-09	BUY	unknown	一般社団法人恵那会 Enakai General Incorporated Association	corporate	370.8K	¥1,629	-63.2%	¥604M ($3.9M)
2024-09-09	BUY	acquisition	井口邦 KUNI IGUCHI	unknown	123.6K	¥1,629	-63.2%	¥201M ($1.3M)
2024-09-09	BUY	unknown	井口邦 KUNI IGUCHI	corporate	123.6K	¥1,629	-63.2%	¥201M ($1.3M)
2023-10-05	BUY	acquisition	株式会社ソウデンコー Sawdenco Co., Ltd.	passive	403.7K	¥733	-18.1%	¥296M ($1.9M)
2022-06-09	SELL	Market Buy	Beyond Investment株式会社 Beyond Investment Co., Ltd.	passive	300.2K	¥1,588	+62.2%	¥270M ($1.7M)
2022-06-07	BUY	Market Buy	Beyond Investment株式会社 Beyond Investment Co., Ltd.	passive	470.0K	¥1,680	-64.3%	¥790M ($5.1M)
2022-06-03	BUY	Market Buy	JPE第1号株式会社 JPE No.1 Co., Ltd.	passive	400.0K	¥1,594	-62.4%	¥638M ($4.1M)
2022-06-02	BUY	unknown	福原聖子 Seiko Fukuhara	strategic	2.3M	¥1,753	-65.8%	¥4.1B ($26.5M)
2022-06-02	BUY	unknown	株式会社コスモウエア CosmoWare Inc.	strategic	1.8M	¥1,753	-65.8%	¥3.2B ($20.4M)

Frequently asked questions

Who has been buying Tripleize Co.,Ltd. stock?: 7 distinct investors have filed 8 disclosed large-shareholding filings in Tripleize Co.,Ltd. (5026), most recently on 2025-05-26. 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 Tripleize Co.,Ltd. have?: Tripleize Co.,Ltd. has 8 buy-side and 8 sell-side disclosures on record, covering ¥9.4B ($60.6M) in total reported value, spanning 2022-06-02 to 2025-05-26.
Where does StockDrifts get Tripleize 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 Tripleize Co.,Ltd.. For how StockDrifts scores these disclosures, see the Japan insider signal tier research, or browse every Japanese stock we track.