Who has been buying Tayca Corporation stock?

10 distinct investors have filed 16 disclosed large-shareholding filings in Tayca Corporation (4027), most recently on 2026-04-24. 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 Tayca Corporation have?

Tayca Corporation has 16 buy-side and 11 sell-side disclosures on record, covering ¥3.6B ($23.0M) in total reported value, spanning 2021-08-12 to 2026-04-24.

Where does StockDrifts get Tayca Corporation 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.

Tayca Corporation 4027

Company

テイカ株式会社Tayca Corporation

Investors

Buys

Total Value

¥3.6B ($23.0M)

Avg Return

+23.07%

Last Filing

2026-04-24

Tayca Corporation (4027) has 16 disclosed large-shareholding filings and 11 disclosed disposals on record, filed by 10 distinct investors. Together those filings cover ¥3.6B ($23.0M) in reported transaction value. The earliest filing StockDrifts holds for Tayca Corporation is dated 2021-08-12; the most recent is 2026-04-24. 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 +23.07%, 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
2026-07-14	BUY	Market Buy	株式会社ドリームキャリアホールディングス	activist	68.2K	¥2,288	+4.8%	¥5M ($34K)
2026-07-14	BUY	Market Buy	株式会社ナチュラリ	activist	666.9K	¥2,288	+4.8%	¥42M ($271K)
2026-07-14	BUY	Market Buy	植島幹九郎	activist	836.5K	¥2,288	+4.8%	¥89M ($575K)
2026-07-14	BUY	Market Buy	株式会社DOE5パーセント	activist	387.0K	¥2,288	+4.8%	¥231M ($1.5M)
2026-07-14	BUY	Market Buy	株式会社UESHIMA	activist	1.6K	¥2,288	+4.8%	¥5M ($34K)
2026-05-26	BUY	unknown	株式会社ドリームキャリアホールディングス	activist	68.2K	¥2,132	+14.7%	¥145M ($938K)
2026-05-26	BUY	Market Buy	株式会社ナチュラリ	activist	677.2K	¥2,132	+14.7%	¥275M ($1.8M)
2026-05-26	BUY	Market Buy	株式会社DOE5パーセント	activist	299.8K	¥2,132	+14.7%	¥459M ($3.0M)
2026-05-26	SELL	unknown	植島幹九郎	activist	832.2K	¥2,132	-14.7%	¥403M ($2.6M)
2026-04-24	BUY	Market Buy	株式会社ドリームキャリアホールディングス	activist	68.2K	¥1,884	+7.3%	¥9M ($58K)
2026-04-24	BUY	Market Buy	株式会社ナチュラリ	activist	548.2K	¥1,884	+7.3%	¥433M ($2.8M)
2026-04-24	BUY	Market Buy	植島幹九郎	activist	1.0M	¥1,884	+7.3%	¥27M ($174K)
2026-04-24	BUY	unknown	株式会社DOE5パーセント	activist	84.1K	¥1,884	+7.3%	¥158M ($1.0M)
2026-04-06	BUY	Market Buy	株式会社ドリームキャリアホールディングス	activist	63.7K	¥1,930	+1.7%	¥125M ($804K)
2026-04-06	BUY	Market Buy	株式会社ナチュラリ	activist	318.4K	¥1,930	+1.7%	¥46M ($298K)
2026-04-06	BUY	Market Buy	植島幹九郎	activist	1.0M	¥1,930	+1.7%	¥189M ($1.2M)
2026-04-06	BUY	Market Buy	株式会社DOE5パーセント	activist	84.1K	¥1,930	+1.7%	¥162M ($1.0M)
2026-03-16	BUY	unknown	株式会社ナチュラリ	activist	293.6K	¥1,720	+10.6%	¥558M ($3.6M)
2026-03-16	BUY	unknown	植島幹九郎	activist	909.6K	¥1,720	+10.6%	¥1.7B ($11.2M)
2026-02-06	SELL	unknown	株式会社みずほ銀行 Mizuho Bank, Ltd.	strategic	1.6M	¥1,503	-26.6%	¥11M ($70K)
2026-01-09	SELL	Market Buy	サマランユーシッツ(SAMARANG UCITS) SAMARANG UCITS	passive	1.1M	¥1,224	-55.4%	¥313M ($2.0M)
2025-12-25	BUY	Market Buy	株式会社アイビー	passive	202.6K	¥1,231	+54.5%	¥385M ($2.5M)
2025-12-25	SELL	Market Buy	光通信株式会社	passive	763.0K	¥1,231	-54.5%	¥1.5B ($9.4M)
2025-11-06	BUY	Market Buy	株式会社アイビー IB, Inc.	passive	190.9K	¥1,302	+46.1%	¥249M ($1.6M)
2025-11-06	BUY	Market Buy	光通信株式会社 Hikari Tsushin K.K.	passive	1.0M	¥1,302	+46.1%	¥1.3B ($8.5M)
2025-10-07	BUY	Market Buy	アセットマネジメントOne株式会社 Asset Management One Co., Ltd.	other	254.1K	¥1,293	+47.1%	¥329M ($2.1M)
2025-10-07	BUY	Market Buy	みずほ証券株式会社 Mizuho Securities Co., Ltd.	strategic	320.4K	¥1,293	+47.1%	¥3M ($20K)
2025-10-07	BUY	Market Buy	株式会社みずほ銀行 Mizuho Bank, Ltd.	strategic	1.0M	¥1,293	+47.1%	¥1.3B ($8.4M)
2025-09-22	SELL	unknown	アセットマネジメントOne株式会社 Asset Management One Co., Ltd.	other	254.3K	¥1,333	-42.7%	¥3M ($21K)
2025-09-22	BUY	unknown	みずほ証券株式会社 Mizuho Securities Co., Ltd.	strategic	317.4K	¥1,333	+42.7%	¥423M ($2.7M)
2025-09-22	BUY	unknown	株式会社みずほ銀行 Mizuho Bank, Ltd.	strategic	1.0M	¥1,333	+42.7%	¥1.3B ($8.7M)
2025-09-05	BUY	Market Buy	アセットマネジメントOne株式会社 Asset Management One Co., Ltd.	other	255.3K	¥1,348	+41.1%	¥3M ($21K)
2025-09-05	BUY	Market Buy	みずほ証券株式会社 Mizuho Securities Co., Ltd.	strategic	318.0K	¥1,348	+41.1%	¥380M ($2.5M)
2025-09-05	BUY	Market Buy	株式会社みずほ銀行 Mizuho Bank, Ltd.	strategic	1.0M	¥1,348	+41.1%	¥93M ($603K)
2025-09-05	SELL	Market Buy	サマランユーシッツ(SAMARANG UCITS) SAMARANG UCITS	passive	1.3M	¥1,348	-41.1%	¥380M ($2.5M)
2025-08-26	SELL	Market Buy	サマランユーシッツ(SAMARANG UCITS) SAMARANG UCITS	passive	1.6M	¥1,303	-46.0%	¥327M ($2.1M)
2025-07-30	SELL	Market Buy	サマランユーシッツ(SAMARANG UCITS) SAMARANG UCITS	passive	1.8M	¥1,237	-53.8%	¥355M ($2.3M)
2025-04-01	SELL	Market Buy	サマランユーシッツ(SAMARANG UCITS) SAMARANG UCITS	passive	2.1M	¥1,320	-44.1%	¥325M ($2.1M)
2022-07-07	SELL	unknown	アセットマネジメントOne株式会社 Asset Management One Co., Ltd.	other	273.8K	¥1,214	-56.7%	¥240M ($1.6M)
2022-07-07	SELL	unknown	みずほ証券株式会社 Mizuho Securities Co., Ltd.	strategic	39.3K	¥1,214	-56.7%	¥112M ($725K)
2022-07-07	BUY	unknown	株式会社みずほ銀行 Mizuho Bank, Ltd.	strategic	1.0M	¥1,214	+56.7%	¥1.2B ($7.9M)
2021-08-12	SELL	Market Buy	サマランユーシッツ(SAMARANG UCITS) SAMARANG UCITS	passive	2.6M	¥1,301	-46.2%	¥365M ($2.4M)

Frequently asked questions

Who has been buying Tayca Corporation stock?: 10 distinct investors have filed 16 disclosed large-shareholding filings in Tayca Corporation (4027), most recently on 2026-04-24. 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 Tayca Corporation have?: Tayca Corporation has 16 buy-side and 11 sell-side disclosures on record, covering ¥3.6B ($23.0M) in total reported value, spanning 2021-08-12 to 2026-04-24.
Where does StockDrifts get Tayca Corporation 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 Tayca Corporation. For how StockDrifts scores these disclosures, see the Japan insider signal tier research, or browse every Japanese stock we track.