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

3 distinct investors have filed 2 disclosed large-shareholding filings in Tamagawa Holdings Co., Ltd. (6838), most recently on 2026-04-21. 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 Tamagawa Holdings Co., Ltd. have?

Tamagawa Holdings Co., Ltd. has 2 buy-side and 13 sell-side disclosures on record, covering ¥2.0B ($13.2M) in total reported value, spanning 2021-08-20 to 2026-04-21.

Where does StockDrifts get Tamagawa Holdings 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.

Tamagawa Holdings Co., Ltd. 6838

Company

株式会社多摩川ホールディングスTamagawa Holdings Co., Ltd.

Investors

Buys

Total Value

¥2.0B ($13.2M)

Avg Return

+148.08%

Last Filing

2026-04-21

Tamagawa Holdings Co., Ltd. (6838) has 2 disclosed large-shareholding filings and 13 disclosed disposals on record, filed by 3 distinct investors. Together those filings cover ¥2.0B ($13.2M) in reported transaction value. The earliest filing StockDrifts holds for Tamagawa Holdings Co., Ltd. is dated 2021-08-20; the most recent is 2026-04-21. 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 +148.08%, 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
2026-04-21	SELL	private	キャンターフィッツジェラルドヨーロッパ(Cantor Fitzgerald Europe) Cantor Fitzgerald Europe	passive	504.0K	¥1,808	-10.6%	¥156M ($1.0M)
2026-04-21	SELL	private	キャンターフィッツジェラルドヨーロッパ(Cantor Fitzgerald Europe) Cantor Fitzgerald Europe	passive	410.5K	¥1,808	-10.6%	¥161M ($1.0M)
2026-04-14	SELL	private	キャンターフィッツジェラルドヨーロッパ(Cantor Fitzgerald Europe) Cantor Fitzgerald Europe	passive	596.0K	¥1,282	-51.5%	¥119M ($766K)
2026-04-07	SELL	private	キャンターフィッツジェラルドヨーロッパ(Cantor Fitzgerald Europe) Cantor Fitzgerald Europe	passive	695.0K	¥1,345	-22.6%	¥148M ($956K)
2026-04-02	SELL	private	キャンターフィッツジェラルドヨーロッパ(Cantor Fitzgerald Europe) Cantor Fitzgerald Europe	passive	815.0K	¥1,210	-34.0%	¥101M ($649K)
2026-03-30	SELL	private	キャンターフィッツジェラルドヨーロッパ(Cantor Fitzgerald Europe) Cantor Fitzgerald Europe	passive	907.1K	¥1,276	-27.1%	¥115M ($745K)
2026-03-25	SELL	private	キャンターフィッツジェラルドヨーロッパ(Cantor Fitzgerald Europe) Cantor Fitzgerald Europe	passive	1.0M	¥1,380	-26.8%	¥111M ($715K)
2026-03-23	SELL	private	キャンターフィッツジェラルドヨーロッパ(Cantor Fitzgerald Europe) Cantor Fitzgerald Europe	passive	1.2M	¥1,343	-30.3%	¥118M ($761K)
2026-03-23	SELL	private	キャンターフィッツジェラルドヨーロッパ(Cantor Fitzgerald Europe) Cantor Fitzgerald Europe	passive	1.1M	¥1,343	-30.3%	¥175M ($1.1M)
2026-03-13	SELL	private	キャンターフィッツジェラルドヨーロッパ(Cantor Fitzgerald Europe) Cantor Fitzgerald Europe	passive	1.4M	¥1,046	-67.3%	¥79M ($512K)
2026-03-04	SELL	private	キャンターフィッツジェラルドヨーロッパ(Cantor Fitzgerald Europe) Cantor Fitzgerald Europe	passive	1.4M	¥903	-93.8%	¥111M ($717K)
2026-03-02	SELL	private	キャンターフィッツジェラルドヨーロッパ(Cantor Fitzgerald Europe) Cantor Fitzgerald Europe	passive	1.6M	¥1,048	-67.0%	¥81M ($524K)
2026-01-08	BUY	Market Buy	キャンターフィッツジェラルドヨーロッパ(Cantor Fitzgerald Europe) Cantor Fitzgerald Europe	passive	1.6M	¥746	+134.6%	¥1.2B ($7.8M)
2023-04-06	BUY	Market Buy	PY OPULENCE INVESTMENT PTE.LTD.	passive	1.5M	¥669	+161.6%	¥834M ($5.4M)
2023-04-06	BUY	Market Buy	PY OPULENCE INVESTMENT PTE.LTD.	passive	1.5M	¥669	+161.6%	¥834M ($5.4M)
2021-08-20	SELL	Market Buy	マリリンヒューティアンタン(MARILYN HWEETIANG TANG) MARILYN HWEETIANG TANG	passive	1.8M	¥1,128	-55.1%	¥73M ($468K)

Frequently asked questions

Who has been buying Tamagawa Holdings Co., Ltd. stock?: 3 distinct investors have filed 2 disclosed large-shareholding filings in Tamagawa Holdings Co., Ltd. (6838), most recently on 2026-04-21. 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 Tamagawa Holdings Co., Ltd. have?: Tamagawa Holdings Co., Ltd. has 2 buy-side and 13 sell-side disclosures on record, covering ¥2.0B ($13.2M) in total reported value, spanning 2021-08-20 to 2026-04-21.
Where does StockDrifts get Tamagawa Holdings 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 Tamagawa Holdings Co., Ltd.. For how StockDrifts scores these disclosures, see the Japan insider signal tier research, or browse every Japanese stock we track.