Who has been buying Tsuchiya Holdings Co., Ltd. stock?

7 distinct investors have filed 7 disclosed large-shareholding filings in Tsuchiya Holdings Co., Ltd. (1840), most recently on 2026-03-27. 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 Tsuchiya Holdings Co., Ltd. have?

Tsuchiya Holdings Co., Ltd. has 7 buy-side and 1 sell-side disclosures on record, covering ¥1.1B ($7.3M) in total reported value, spanning 2022-03-11 to 2026-03-27.

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.

Tsuchiya Holdings Co., Ltd. 1840

Company

株式会社土屋ホールディングスTsuchiya Holdings Co., Ltd.

Investors

Buys

Total Value

¥1.1B ($7.3M)

Avg Return

+15.60%

Last Filing

2026-03-27

Tsuchiya Holdings Co., Ltd. (1840) has 7 disclosed large-shareholding filings and 1 disclosed disposals on record, filed by 7 distinct investors. Together those filings cover ¥1.1B ($7.3M) in reported transaction value. The earliest filing StockDrifts holds for Tsuchiya Holdings Co., Ltd. is dated 2022-03-11; the most recent is 2026-03-27. Across these filings the average return since disclosure is +15.60%, 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
2026-03-27	BUY	unknown	土屋みどり	activist	10.0K	¥234	-	-
2026-03-27	BUY	unknown	土屋昌三	activist	870.9K	¥234	-	-
2026-03-27	BUY	unknown	株式会社土屋経営	activist	2.8M	¥234	-	-
2026-03-27	BUY	unknown	株式会社土屋総合研究所	strategic	3.4M	¥234	-	-
2025-04-03	BUY	unknown	積水ハウス株式会社 Sekisui House, Ltd.	strategic	1.6M	¥226	+11.5%	¥358M ($2.3M)
2022-10-11	BUY	unknown	土屋昌三 tsuchiya syouzou	activist	482.1K	¥198	+27.3%	¥95M ($616K)
2022-10-11	BUY	unknown	土屋昌三 tsuchiya syouzou	activist	482.1K	¥198	+27.3%	-
2022-10-11	BUY	unknown	株式会社土屋経営 Tsuchiya Management Co., Ltd.	activist	2.8M	¥198	+27.3%	-
2022-10-11	BUY	unknown	株式会社土屋総合研究所 Tsuchiya Research Institute Co., Ltd.	strategic	3.4M	¥198	+27.3%	-
2022-10-11	BUY	unknown	株式会社土屋経営 Tsuchiya Management Co., Ltd.	activist	2.8M	¥198	+27.3%	¥548M ($3.5M)
2022-10-11	BUY	unknown	株式会社土屋総合研究所 Tsuchiya Research Institute Co., Ltd.	strategic	3.4M	¥198	+27.3%	¥681M ($4.4M)
2022-03-11	SELL	unknown	土屋公三 Tsuchiya Kouzou	strategic	757.8K	¥175	-44.0%	¥2M ($15K)
2022-03-11	BUY	unknown	土屋博子 Hiroko Tsuchiya	strategic	738.8K	¥175	-	-
2022-03-11	BUY	unknown	株式会社土屋総合研究所 Tsuchiya Research Institute Co., Ltd.	strategic	3.4M	¥175	-	-
2022-03-11	BUY	unknown	株式会社土屋経営 Tsuchiya Management Co., Ltd.	strategic	2.8M	¥175	-	-

Frequently asked questions

Who has been buying Tsuchiya Holdings Co., Ltd. stock?: 7 distinct investors have filed 7 disclosed large-shareholding filings in Tsuchiya Holdings Co., Ltd. (1840), most recently on 2026-03-27. 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 Tsuchiya Holdings Co., Ltd. have?: Tsuchiya Holdings Co., Ltd. has 7 buy-side and 1 sell-side disclosures on record, covering ¥1.1B ($7.3M) in total reported value, spanning 2022-03-11 to 2026-03-27.
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.

More on this data

Every trade listed above comes from an official regulatory disclosure. For how StockDrifts scores these disclosures, see the Japan insider signal tier research, or browse every Japanese stock we track.