Who has been buying Dkk-Toa Corporation stock?

7 distinct investors have filed 11 disclosed large-shareholding filings in Dkk-Toa Corporation (6848), most recently on 2026-03-24. 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 Dkk-Toa Corporation have?

Dkk-Toa Corporation has 11 buy-side and 5 sell-side disclosures on record, covering ¥16.1B ($104.1M) in total reported value, spanning 2021-12-07 to 2026-03-24.

Where does StockDrifts get Dkk-Toa 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.

Dkk-Toa Corporation 6848

Company

東亜ディーケーケー株式会社Dkk-Toa Corporation

Investors

Buys

Total Value

¥16.1B ($104.1M)

Avg Return

+7.74%

Last Filing

2026-03-24

Dkk-Toa Corporation (6848) has 11 disclosed large-shareholding filings and 5 disclosed disposals on record, filed by 7 distinct investors. Together those filings cover ¥16.1B ($104.1M) in reported transaction value. The earliest filing StockDrifts holds for Dkk-Toa Corporation is dated 2021-12-07; the most recent is 2026-03-24. 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 +7.74%, 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
2026-03-24	BUY	Market Buy	株式会社UH6	passive	1.4M	¥878	-0.1%	¥1.2B ($7.8M)
2026-03-24	SELL	Market Buy	株式会社UH5	unknown	0	¥878	-0.1%	-
2026-03-24	BUY	Market Buy	株式会社UH Partners 2	passive	680.1K	¥878	-0.1%	¥598M ($3.9M)
2026-03-24	BUY	Market Buy	光通信株式会社	passive	362.5K	¥878	+0.1%	¥319M ($2.1M)
2025-09-29	BUY	Market Buy	株式会社UH5 UH5 Co., Ltd.	passive	1.3M	¥850	+3.4%	¥7M ($44K)
2025-09-29	BUY	Market Buy	株式会社UH Partners 2 UH Partners 2, Inc.	passive	680.1K	¥850	+3.4%	¥578M ($3.7M)
2025-09-29	BUY	Market Buy	光通信株式会社 Hikari Tsushin K.K.	passive	300.8K	¥850	+3.4%	¥93M ($600K)
2025-05-20	BUY	Market Buy	株式会社UH5 UH5 Co., Ltd.	passive	1.3M	¥790	+11.3%	¥1.1B ($6.8M)
2025-05-20	BUY	Market Buy	株式会社UH Partners 2 UH Partners 2, Inc.	passive	680.1K	¥790	+11.3%	¥6M ($41K)
2025-05-20	BUY	Market Buy	光通信株式会社 Hikari Tsushin K.K.	passive	191.4K	¥790	+11.3%	¥15.1B ($97.3M)
2025-03-17	BUY	Market Buy	株式会社UH5 UH5 Co., Ltd.	passive	1.3M	¥835	+5.3%	¥1.1B ($7.2M)
2025-03-17	BUY	Market Buy	株式会社UH Partners 2 UH Partners 2, Inc.	passive	671.8K	¥835	+5.3%	¥45M ($289K)
2025-03-17	SELL	Market Buy	光通信株式会社 Hikari Tsushin K.K.	unknown	0	¥835	-5.3%	¥1.1B ($7.2M)
2025-02-06	BUY	Market Buy	株式会社UH Partners 2 UH Partners 2, Inc.	passive	617.7K	¥742	+18.5%	¥257M ($1.7M)
2025-02-06	BUY	Market Buy	光通信株式会社 Hikari Tsushin K.K.	passive	1.3M	¥742	+18.5%	¥987M ($6.4M)
2024-12-05	BUY	Market Buy	株式会社UH Partners 2 UH Partners 2, Inc.	passive	272.3K	¥723	+21.6%	¥147M ($946K)
2024-12-05	BUY	Market Buy	光通信株式会社 Hikari Tsushin K.K.	passive	1.3M	¥723	+21.6%	¥961M ($6.2M)
2023-08-18	BUY	Market Buy	株式会社UH Partners 2 UH Partners 2, Inc.	passive	70.5K	¥841	+4.5%	¥59M ($383K)
2023-08-18	BUY	Market Buy	光通信株式会社 Hikari Tsushin K.K.	passive	1.3M	¥841	+4.5%	¥110M ($712K)
2022-10-06	BUY	Market Buy	光通信株式会社 Hikari Tsushin K.K.	passive	1.2M	¥863	+1.9%	¥173M ($1.1M)
2022-08-25	BUY	Market Buy	光通信株式会社 Hikari Tsushin K.K.	passive	998.5K	¥845	+4.0%	¥844M ($5.4M)
2021-12-07	SELL	unknown	株式会社みずほ銀行 Mizuho Bank, Ltd.	strategic	462.5K	¥870	-1.0%	¥43M ($279K)
2021-12-07	SELL	unknown	アセットマネジメントOne株式会社 Asset Management One Co., Ltd.	other	214.5K	¥870	-1.0%	¥48M ($312K)
2021-12-07	SELL	unknown	みずほ信託銀行株式会社 Mizuho Trust & Banking Co., Ltd.	strategic	209.0K	¥870	-1.0%	¥43M ($279K)

Frequently asked questions

Who has been buying Dkk-Toa Corporation stock?: 7 distinct investors have filed 11 disclosed large-shareholding filings in Dkk-Toa Corporation (6848), most recently on 2026-03-24. 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 Dkk-Toa Corporation have?: Dkk-Toa Corporation has 11 buy-side and 5 sell-side disclosures on record, covering ¥16.1B ($104.1M) in total reported value, spanning 2021-12-07 to 2026-03-24.
Where does StockDrifts get Dkk-Toa 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 Dkk-Toa Corporation. For how StockDrifts scores these disclosures, see the Japan insider signal tier research, or browse every Japanese stock we track.