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

13 distinct investors have filed 29 disclosed large-shareholding filings in Toumei Co.,Ltd. (4439), 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 Toumei Co.,Ltd. have?

Toumei Co.,Ltd. has 29 buy-side and 36 sell-side disclosures on record, covering ¥3.0B ($19.4M) in total reported value, spanning 2021-04-21 to 2026-04-24.

Where does StockDrifts get Toumei 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.

Toumei Co.,Ltd. 4439

Company

株式会社東名Toumei Co.,Ltd.

Investors

Buys

Total Value

¥3.0B ($19.4M)

Avg Return

+100.07%

Last Filing

2026-04-24

Toumei Co.,Ltd. (4439) has 29 disclosed large-shareholding filings and 36 disclosed disposals on record, filed by 13 distinct investors. Together those filings cover ¥3.0B ($19.4M) in reported transaction value. The earliest filing StockDrifts holds for Toumei Co.,Ltd. is dated 2021-04-21; 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 +100.07%, 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
2026-04-24	BUY	Market Buy	株式会社エスアイエル	passive	1.3M	¥868	-12.3%	¥287M ($1.9M)
2026-04-24	SELL	Market Buy	株式会社FTコミュニケーションズ	passive	2.4M	¥868	+12.3%	¥3M ($17K)
2026-04-24	BUY	Market Buy	株式会社UH5	passive	35.3K	¥868	-12.3%	¥31M ($198K)
2026-04-24	BUY	Market Buy	株式会社アイビー	passive	158.4K	¥868	-12.3%	¥137M ($887K)
2026-04-24	BUY	Market Buy	株式会社エヌオーアイ	passive	156.8K	¥868	-12.3%	¥136M ($878K)
2026-04-24	BUY	Market Buy	株式会社UH Partners 3	passive	2.1M	¥868	-12.3%	¥1.8B ($11.8M)
2026-04-24	BUY	Market Buy	株式会社UH Partners 2	passive	2.1M	¥868	-12.3%	¥1.8B ($11.8M)
2026-04-24	BUY	Market Buy	光通信株式会社	passive	2.3M	¥868	-12.3%	¥2.0B ($12.6M)
2026-03-06	SELL	negotiated	株式会社セレッソ	activist	2.2M	¥1,040	+17.4%	¥1.9B ($12.1M)
2026-03-06	SELL	negotiated	山本文彦	activist	11.7M	¥1,040	+17.4%	¥10.0B ($64.8M)
2026-03-06	BUY	Market Buy	株式会社FTコミュニケーションズ	passive	2.4M	¥1,040	+17.4%	¥2.1B ($13.3M)
2026-03-06	BUY	Market Buy	株式会社UH5	passive	35.3K	¥1,040	+17.4%	¥30M ($196K)
2026-03-06	BUY	Market Buy	株式会社アイビー	passive	158.4K	¥1,040	+17.4%	¥136M ($878K)
2026-03-06	BUY	Market Buy	株式会社エヌオーアイ	passive	156.8K	¥1,040	+17.4%	¥135M ($869K)
2026-03-06	BUY	Market Buy	株式会社エスアイエル	passive	1.0M	¥1,040	-17.4%	¥866M ($5.6M)
2026-03-06	BUY	Market Buy	株式会社UH Partners 3	passive	2.1M	¥1,040	+17.4%	¥1.8B ($11.6M)
2026-03-06	BUY	Market Buy	株式会社UH Partners 2	passive	2.1M	¥1,040	+17.4%	¥1.8B ($11.6M)
2026-03-06	BUY	Market Buy	光通信株式会社	passive	2.3M	¥1,040	-17.4%	¥1.9B ($12.5M)
2026-02-06	BUY	Market Buy	光通信株式会社 Hikari Tsushin K.K.	passive	9.9M	¥1,082	-20.6%	¥237M ($1.5M)
2025-12-17	BUY	Market Buy	株式会社エフティグループ	passive	2.4M	¥1,039	+17.3%	¥2.1B ($13.3M)
2025-12-17	BUY	Market Buy	株式会社UH5	passive	35.3K	¥1,039	+17.3%	¥30M ($196K)
2025-12-17	BUY	Market Buy	株式会社アイビー	passive	158.4K	¥1,039	+17.3%	¥136M ($878K)
2025-12-17	BUY	Market Buy	株式会社エヌオーアイ	passive	156.8K	¥1,039	+17.3%	¥135M ($869K)
2025-12-17	BUY	Market Buy	株式会社エスアイエル	passive	523.0K	¥1,039	-17.3%	¥449M ($2.9M)
2025-12-17	BUY	Market Buy	株式会社UH Partners 3	passive	2.1M	¥1,039	+17.3%	¥1.8B ($11.6M)
2025-12-17	BUY	Market Buy	株式会社UH Partners 2	passive	2.1M	¥1,039	+17.3%	¥1.8B ($11.6M)
2025-12-17	BUY	Market Buy	光通信株式会社	passive	2.2M	¥1,039	+17.3%	¥1.9B ($12.2M)
2025-11-20	SELL	Market Buy	株式会社エフティグループ FTGroup Co., Ltd.	passive	2.4M	¥1,009	+14.9%	¥6M ($39K)
2025-11-20	BUY	Market Buy	株式会社UH5 UH5 Co., Ltd.	passive	35.3K	¥1,009	-14.9%	¥36M ($230K)
2025-11-20	BUY	Market Buy	株式会社アイビー IB, Inc.	passive	158.4K	¥1,009	-14.9%	¥160M ($1.0M)
2025-11-20	BUY	Market Buy	株式会社エヌオーアイ NIO Co., Ltd.	passive	156.8K	¥1,009	-14.9%	¥158M ($1.0M)
2025-11-20	BUY	Market Buy	株式会社エスアイエル SIL Co., Ltd.	passive	413.6K	¥1,009	-14.9%	¥294M ($1.9M)
2025-11-20	SELL	Market Buy	株式会社UH Partners 3 UH Partners 3 Co., Ltd.	passive	2.1M	¥1,009	+14.9%	¥6M ($39K)
2025-11-20	SELL	Market Buy	株式会社UH Partners 2 UH Partners 2, Inc.	passive	2.1M	¥1,009	+14.9%	¥6M ($39K)
2025-11-20	SELL	Market Buy	光通信株式会社 Hikari Tsushin K.K.	passive	2.2M	¥1,009	+14.9%	¥6M ($39K)
2025-10-24	BUY	negotiated	株式会社セレッソ Cerezo Co., Ltd.	activist	2.2M	¥993	-13.5%	¥2.2B ($14.0M)
2025-10-24	SELL	negotiated	山本文彦 Yamamto Fumihiko	activist	11.7M	¥993	+13.5%	¥991M ($6.4M)
2025-10-01	SELL	negotiated	株式会社セレッソ Cerezo Co., Ltd.	activist	2.2M	¥1,031	+16.7%	¥3M ($20K)
2025-10-01	SELL	negotiated	株式会社セレッソ Cerezo Co., Ltd.	activist	2.2M	¥1,031	+16.7%	¥3M ($20K)
2025-10-01	SELL	negotiated	山本文彦 Yamamto Fumihiko	activist	12.7M	¥1,031	+16.7%	¥34M ($220K)
2025-10-01	SELL	negotiated	山本文彦 Yamamto Fumihiko	activist	12.7M	¥1,031	+16.7%	¥34M ($220K)
2025-09-29	SELL	Market Buy	株式会社UH Partners 2 UH Partners 2, Inc.	passive	2.1M	¥1,063	+19.2%	¥182M ($1.2M)
2025-09-29	SELL	Market Buy	株式会社エフティグループ FTGroup Co., Ltd.	passive	2.4M	¥1,063	+19.2%	¥13M ($82K)
2025-09-29	BUY	Market Buy	株式会社アイビー IB, Inc.	passive	158.4K	¥1,063	-19.2%	¥168M ($1.1M)
2025-09-29	BUY	Market Buy	株式会社エヌオーアイ NIO Co., Ltd.	passive	156.8K	¥1,063	-19.2%	¥167M ($1.1M)
2025-09-29	SELL	Market Buy	株式会社エスアイエル SIL Co., Ltd.	passive	122.3K	¥1,063	+19.2%	¥3.4B ($21.8M)
2025-09-29	SELL	Market Buy	株式会社UH Partners 3 UH Partners 3 Co., Ltd.	passive	2.1M	¥1,063	+19.2%	¥182M ($1.2M)
2025-09-29	SELL	Market Buy	光通信株式会社 Hikari Tsushin K.K.	passive	2.2M	¥1,063	+19.2%	¥13M ($82K)
2025-07-28	BUY	negotiated	株式会社セレッソ Cerezo Co., Ltd.	activist	1.1M	¥899.5	-4.5%	¥985M ($6.4M)
2025-07-28	SELL	negotiated	山本文彦 Yamamto Fumihiko	activist	6.3M	¥899.5	+4.5%	¥987M ($6.4M)

Showing the 50 most recent of 133 filings.

Frequently asked questions

Who has been buying Toumei Co.,Ltd. stock?: 13 distinct investors have filed 29 disclosed large-shareholding filings in Toumei Co.,Ltd. (4439), 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 Toumei Co.,Ltd. have?: Toumei Co.,Ltd. has 29 buy-side and 36 sell-side disclosures on record, covering ¥3.0B ($19.4M) in total reported value, spanning 2021-04-21 to 2026-04-24.
Where does StockDrifts get Toumei 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 Toumei Co.,Ltd.. For how StockDrifts scores these disclosures, see the Japan insider signal tier research, or browse every Japanese stock we track.