Who has been buying TOA Corporation stock?

14 distinct investors have filed 85 disclosed large-shareholding filings in TOA Corporation (1885), most recently on 2026-03-26. 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 TOA Corporation have?

TOA Corporation has 85 buy-side and 54 sell-side disclosures on record, covering ¥17.2B ($110.9M) in total reported value, spanning 2021-03-17 to 2026-03-26.

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.

TOA Corporation 1885

Company

東亜建設工業株式会社TOA Corporation

Investors

Buys

Total Value

¥17.2B ($110.9M)

Avg Return

+337.38%

Last Filing

2026-03-26

TOA Corporation (1885) has 85 disclosed large-shareholding filings and 54 disclosed disposals on record, filed by 14 distinct investors. Together those filings cover ¥17.2B ($110.9M) in reported transaction value. The earliest filing StockDrifts holds for TOA Corporation is dated 2021-03-17; the most recent is 2026-03-26. Across these filings the average return since disclosure is +337.38%, 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
2026-03-26	BUY	unknown	株式会社みずほ銀行	strategic	1.0M	¥3,300	-	-
2026-03-26	BUY	unknown	みずほ証券株式会社	other	304.3K	¥3,300	-34.6%	¥406M ($2.6M)
2026-03-26	BUY	unknown	みずほ信託銀行株式会社	strategic	5.5M	¥3,300	-34.6%	¥5.6B ($36.2M)
2026-03-26	SELL	unknown	アセットマネジメントOne株式会社	other	2.7M	¥3,300	+34.6%	¥2.4B ($15.7M)
2026-01-09	BUY	Market Buy	アセットマネジメントOne株式会社	other	3.4M	¥3,060	-29.5%	¥2.5B ($16.3M)
2026-01-09	BUY	Market Buy	株式会社みずほ銀行	strategic	1.0M	¥3,060	-	-
2026-01-09	BUY	Market Buy	みずほ証券株式会社	other	181.9K	¥3,060	-	¥557M ($3.6M)
2026-01-09	SELL	Market Buy	みずほ信託銀行株式会社	strategic	3.8M	¥3,060	+29.5%	¥269M ($1.7M)
2025-06-20	BUY	unknown	株式会社みずほ銀行 Mizuho Bank, Ltd.	strategic	1.0M	¥1,510	-	-
2025-06-20	BUY	unknown	みずほ信託銀行株式会社 Mizuho Trust & Banking Co., Ltd.	strategic	3.9M	¥1,510	+42.9%	¥266M ($1.7M)
2025-06-20	SELL	unknown	アセットマネジメントOne株式会社 Asset Management One Co., Ltd.	other	2.6M	¥1,510	-42.9%	¥1.4B ($8.7M)
2025-02-04	SELL	unknown	株式会社みずほ銀行 Mizuho Bank, Ltd.	strategic	1.0M	¥1,152	-87.3%	¥1.4B ($8.9M)
2025-02-04	BUY	unknown	みずほ信託銀行株式会社 Mizuho Trust & Banking Co., Ltd.	strategic	3.7M	¥1,152	+87.3%	¥507M ($3.3M)
2025-02-04	SELL	unknown	アセットマネジメントOne株式会社 Asset Management One Co., Ltd.	other	3.5M	¥1,152	-87.3%	¥436M ($2.8M)
2024-02-26	BUY	unknown	株式会社みずほ銀行 Mizuho Bank, Ltd.	strategic	572.4K	¥1,280	-	-
2024-02-26	BUY	unknown	みずほ証券株式会社 Mizuho Securities Co., Ltd.	other	12.8K	¥1,280	+68.6%	¥1.5B ($10.0M)
2024-02-26	BUY	unknown	みずほ信託銀行株式会社 Mizuho Trust & Banking Co., Ltd.	strategic	841.0K	¥1,280	-	-
2024-02-26	SELL	unknown	アセットマネジメントOne株式会社 Asset Management One Co., Ltd.	other	990.2K	¥1,280	-68.6%	¥107M ($687K)
2024-01-15	BUY	unknown	株式会社みずほ銀行 Mizuho Bank, Ltd.	strategic	572.4K	¥972.5	-	-
2024-01-15	BUY	unknown	みずほ証券株式会社 Mizuho Securities Co., Ltd.	other	144.1K	¥972.5	-	¥140M ($904K)
2024-01-15	BUY	unknown	みずほ信託銀行株式会社 Mizuho Trust & Banking Co., Ltd.	strategic	841.0K	¥972.5	-	-
2024-01-15	BUY	unknown	アセットマネジメントOne株式会社 Asset Management One Co., Ltd.	other	1.1M	¥972.5	+121.9%	¥79M ($508K)
2023-12-05	SELL	unknown	株式会社シティインデックスイレブンス City Index Eleven Co., Ltd.	activist	1.1M	¥886.25	-143.5%	¥205M ($1.3M)
2023-11-06	SELL	unknown	株式会社シティインデックスイレブンス City Index Eleven Co., Ltd.	activist	1.3M	¥920	-134.6%	¥224M ($1.4M)
2023-10-26	BUY	Market Buy	株式会社みずほ銀行 Mizuho Bank, Ltd.	strategic	572.4K	¥908.75	+137.5%	¥4M ($26K)
2023-10-26	BUY	Market Buy	みずほ証券株式会社 Mizuho Securities Co., Ltd.	other	1.5K	¥908.75	+137.5%	¥114M ($739K)
2023-10-26	SELL	Market Buy	みずほ信託銀行株式会社 Mizuho Trust & Banking Co., Ltd.	strategic	841.9K	¥908.75	-137.5%	¥4M ($26K)
2023-10-26	BUY	Market Buy	アセットマネジメントOne株式会社 Asset Management One Co., Ltd.	other	991.0K	¥908.75	+137.5%	¥213M ($1.4M)
2023-10-26	BUY	Market Buy	みずほインターナショナル Mizuho International plc	unknown	0	¥908.75	-	-
2023-09-26	SELL	unknown	株式会社シティインデックスイレブンス City Index Eleven Co., Ltd.	activist	1.6M	¥931.25	-131.7%	¥203M ($1.3M)
2023-09-06	BUY	unknown	株式会社シティインデックスイレブンス City Index Eleven Co., Ltd.	activist	1.8M	¥913.75	+136.2%	¥1.6B ($10.4M)
2023-09-06	SELL	unknown	野村絢 Aya Nomura (Murakami family)	unknown	0	¥913.75	-136.2%	¥109M ($703K)
2023-08-23	BUY	unknown	株式会社シティインデックスイレブンス City Index Eleven Co., Ltd.	activist	1.9M	¥877.5	-	-
2023-08-23	SELL	unknown	野村絢 Aya Nomura (Murakami family)	activist	119.5K	¥877.5	-145.9%	¥211M ($1.4M)
2023-08-15	BUY	Market Buy	株式会社シティインデックスイレブンス City Index Eleven Co., Ltd.	activist	1.9M	¥871.25	+147.7%	¥6M ($38K)
2023-08-15	SELL	Market Buy	野村絢 Aya Nomura (Murakami family)	activist	360.1K	¥871.25	-147.7%	¥206M ($1.3M)
2023-07-10	BUY	unknown	株式会社シティインデックスイレブンス City Index Eleven Co., Ltd.	activist	1.9M	¥775	-	-
2023-07-10	SELL	unknown	野村絢 Aya Nomura (Murakami family)	activist	596.4K	¥775	-178.4%	¥180M ($1.2M)
2023-05-26	BUY	unknown	株式会社シティインデックスイレブンス City Index Eleven Co., Ltd.	activist	1.9M	¥783.75	-	-
2023-05-26	SELL	unknown	野村絢 Aya Nomura (Murakami family)	activist	826.8K	¥783.75	-175.3%	¥182M ($1.2M)
2023-05-22	SELL	unknown	株式会社シティインデックスイレブンス City Index Eleven Co., Ltd.	activist	1.9M	¥771.25	-179.8%	¥17M ($112K)
2023-05-22	SELL	unknown	野村絢 Aya Nomura (Murakami family)	activist	1.1M	¥771.25	-179.8%	¥229M ($1.5M)
2023-03-03	BUY	unknown	株式会社みずほ銀行 Mizuho Bank, Ltd.	strategic	572.4K	¥675	-	-
2023-03-03	BUY	unknown	みずほ信託銀行株式会社 Mizuho Trust & Banking Co., Ltd.	strategic	852.5K	¥675	+219.7%	¥208M ($1.3M)
2023-03-03	SELL	unknown	アセットマネジメントOne株式会社 Asset Management One Co., Ltd.	other	764.9K	¥675	-219.7%	¥23M ($147K)
2023-03-03	BUY	unknown	みずほインターナショナル Mizuho International plc	other	0	¥675	-	-
2023-03-03	SELL	unknown	みずほ証券株式会社 Mizuho Securities Co., Ltd.	other	100.6K	¥675	-219.7%	¥91M ($588K)
2023-01-05	BUY	Market Buy	株式会社シティインデックスイレブンス City Index Eleven Co., Ltd.	activist	1.9M	¥585.75	+268.4%	¥142M ($918K)
2023-01-05	BUY	Market Buy	野村絢 Aya Nomura (Murakami family)	activist	1.4M	¥585.75	-	-
2022-11-22	BUY	Market Buy	株式会社シティインデックスイレブンス City Index Eleven Co., Ltd.	activist	1.7M	¥581.75	+270.9%	¥133M ($861K)

Showing the 50 most recent of 200 filings.

Frequently asked questions

Who has been buying TOA Corporation stock?: 14 distinct investors have filed 85 disclosed large-shareholding filings in TOA Corporation (1885), most recently on 2026-03-26. 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 TOA Corporation have?: TOA Corporation has 85 buy-side and 54 sell-side disclosures on record, covering ¥17.2B ($110.9M) in total reported value, spanning 2021-03-17 to 2026-03-26.
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.