Who has been buying Diamond Electric Holdings Co., Ltd. stock?

15 distinct investors have filed 37 disclosed large-shareholding filings in Diamond Electric Holdings Co., Ltd. (6699), most recently on 2026-05-14. 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 Diamond Electric Holdings Co., Ltd. have?

Diamond Electric Holdings Co., Ltd. has 37 buy-side and 50 sell-side disclosures on record, covering ¥28.3B ($182.8M) in total reported value, spanning 2021-03-24 to 2026-05-14.

Where does StockDrifts get Diamond Electric 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.

Diamond Electric Holdings Co., Ltd. 6699

Company

ダイヤモンドエレクトリックホールディングス株式会社Diamond Electric Holdings Co., Ltd.

Investors

Buys

Total Value

¥28.3B ($182.8M)

Avg Return

-50.76%

Last Filing

2026-05-14

Diamond Electric Holdings Co., Ltd. (6699) has 37 disclosed large-shareholding filings and 50 disclosed disposals on record, filed by 15 distinct investors. Together those filings cover ¥28.3B ($182.8M) in reported transaction value. The earliest filing StockDrifts holds for Diamond Electric Holdings Co., Ltd. is dated 2021-03-24; the most recent is 2026-05-14. 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 -50.76%, 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
2026-08-07	BUY	Market Buy	エボリューション・キャピタル・マネジメント・エルエルシー Evolution Capital Management LLC	passive	0	¥495	+5.3%	-
2026-08-07	SELL	private	エボファンド Evo Fund	engagement	5.0M	¥495	-5.3%	¥78M ($502K)
2026-07-13	BUY	Market Buy	エボリューション・キャピタル・マネジメント・エルエルシー Evolution Capital Management LLC	passive	0	¥481	+5.2%	-
2026-07-13	SELL	private	エボファンド Evo Fund	activist	5.3M	¥481	-5.2%	¥35M ($223K)
2026-07-10	SELL	private	エボファンド Evo Fund	activist	5.4M	¥494	-0.2%	¥76M ($491K)
2026-07-10	BUY	Market Buy	エボリューション・キャピタル・マネジメント・エルエルシー Evolution Capital Management LLC	passive	0	¥494	+0.2%	-
2026-06-22	SELL	unknown	野村アセットマネジメント株式会社	other	301.2K	¥474	-1.3%	¥6M ($37K)
2026-06-22	BUY	unknown	ノムラインターナショナルピーエルシー NOMURA INTERNATIONAL PLC	other	18.0K	¥474	+1.3%	¥9M ($55K)
2026-06-22	SELL	unknown	野村證券株式会社	other	1.4K	¥474	-1.3%	¥157M ($1.0M)
2026-06-22	SELL	unknown	りそなアセットマネジメント株式会社	other	115.5K	¥474	-1.3%	¥16M ($103K)
2026-06-22	SELL	negotiated	株式会社りそな銀行	strategic	787.4K	¥474	-1.3%	¥54M ($345K)
2026-06-19	BUY	unknown	勝野仁視 HITOSHI KATSUNO	strategic	510.7K	¥469	+2.4%	¥63M ($404K)
2026-06-19	BUY	unknown	勝野仁視 HITOSHI KATSUNO	strategic	510.7K	¥469	+2.4%	¥63M ($404K)
2026-06-17	BUY	unknown	勝野仁視 HITOSHI KATSUNO	strategic	510.7K	¥475	+1.1%	¥63M ($409K)
2026-06-17	SELL	unknown	勝野仁視 HITOSHI KATSUNO	strategic	510.7K	¥475	-1.1%	¥63M ($409K)
2026-06-16	BUY	Market Buy	エボリューション・キャピタル・マネジメント・エルエルシー Evolution Capital Management LLC	passive	0	¥471	+1.3%	-
2026-06-16	SELL	private	エボファンド Evo Fund	activist	5.6M	¥471	-1.3%	¥66M ($425K)
2026-06-08	BUY	Market Buy	エボリューション・キャピタル・マネジメント・エルエルシー Evolution Capital Management LLC	passive	0	¥478	+1.5%	-
2026-06-08	SELL	private	エボファンド Evo Fund	activist	5.8M	¥478	-1.5%	¥16M ($103K)
2026-06-05	BUY	unknown	野村アセットマネジメント株式会社	other	313.0K	¥486	-0.2%	¥152M ($981K)
2026-06-05	BUY	unknown	野村證券株式会社	other	332.2K	¥486	-0.2%	¥161M ($1.0M)
2026-06-04	BUY	Market Buy	エボリューション・キャピタル・マネジメント・エルエルシー Evolution Capital Management LLC	passive	0	¥468	+3.6%	-
2026-06-04	SELL	private	エボファンド Evo Fund	activist	5.8M	¥468	-3.6%	¥59M ($380K)
2026-05-14	BUY	Market Buy	エボリューション・キャピタル・マネジメント・エルエルシー Evolution Capital Management LLC	passive	0	¥536	-9.3%	-
2026-05-14	SELL	private	エボファンド Evo Fund	activist	6.0M	¥536	+9.3%	¥18M ($116K)
2026-04-24	BUY	Market Buy	エボリューション・キャピタル・マネジメント・エルエルシー Evolution Capital Management LLC	passive	0	¥538	-13.6%	-
2026-04-24	SELL	private	エボファンド Evo Fund	activist	6.1M	¥538	+13.6%	¥59M ($384K)
2026-04-15	BUY	private	エボリューション・キャピタル・マネジメント・エルエルシー Evolution Capital Management LLC	passive	0	¥575	-16.5%	-
2026-04-15	SELL	private	エボファンド Evo Fund	activist	6.2M	¥575	+16.5%	¥76M ($490K)
2026-04-06	BUY	unknown	大和アセットマネジメント株式会社	other	129.6K	¥567	-5.5%	¥73M ($474K)
2026-04-06	BUY	unknown	大和証券株式会社	other	434.7K	¥567	-5.5%	¥246M ($1.6M)
2026-04-03	SELL	negotiated	りそなアセットマネジメント株式会社	other	130.2K	¥570	+6.0%	¥29M ($186K)
2026-04-03	SELL	negotiated	株式会社りそな銀行	strategic	787.4K	¥570	+6.0%	¥72M ($464K)
2026-03-26	BUY	private	エボリューション・キャピタル・マネジメント・エルエルシー Evolution Capital Management LLC	passive	0	¥610	+4.6%	-
2026-03-26	SELL	private	エボファンド Evo Fund	activist	6.4M	¥610	+4.6%	¥3.7B ($24.1M)
2026-03-25	BUY	private	エボリューション・キャピタル・マネジメント・エルエルシー Evolution Capital Management LLC	passive	0	¥624	+6.7%	-
2026-03-25	SELL	private	エボファンド Evo Fund	activist	7.2M	¥624	+6.7%	¥4.2B ($27.1M)
2026-03-18	BUY	private	エボリューション・キャピタル・マネジメント・エルエルシー Evolution Capital Management LLC	passive	0	¥677	+14.0%	-
2026-03-18	SELL	private	エボファンド Evo Fund	activist	7.5M	¥677	+14.0%	¥4.3B ($28.0M)
2026-03-06	BUY	private	エボリューション・キャピタル・マネジメント・エルエルシー Evolution Capital Management LLC	passive	0	¥633	+8.1%	-
2026-03-06	SELL	private	エボファンド Evo Fund	activist	7.6M	¥633	+8.1%	¥4.4B ($28.7M)
2026-03-03	BUY	private	エボリューション・キャピタル・マネジメント・エルエルシー Evolution Capital Management LLC	passive	0	¥622	+6.4%	-
2026-03-03	SELL	private	エボファンド Evo Fund	activist	7.8M	¥622	+6.4%	¥4.5B ($29.3M)
2026-02-20	BUY	private	エボリューション・キャピタル・マネジメント・エルエルシー Evolution Capital Management LLC	passive	0	¥654	+11.0%	-
2026-02-20	SELL	private	エボファンド Evo Fund	activist	8.0M	¥654	+11.0%	¥4.7B ($30.0M)
2026-02-12	BUY	private	エボリューション・キャピタル・マネジメント・エルエルシー Evolution Capital Management LLC	passive	0	¥635	+8.3%	-
2026-02-12	SELL	private	エボファンド Evo Fund	activist	8.3M	¥635	+8.3%	¥4.8B ($31.0M)
2026-01-26	BUY	Market Buy	エボリューション・キャピタル・マネジメント・エルエルシー Evolution Capital Management LLC	passive	0	¥591	+1.5%	-
2026-01-26	SELL	Market Buy	エボファンド Evo Fund	activist	8.5M	¥591	+1.5%	¥4.9B ($31.8M)
2026-01-20	BUY	Market Buy	エボリューション・キャピタル・マネジメント・エルエルシー Evolution Capital Management LLC	passive	0	¥599	+2.8%	-

Showing the 50 most recent of 132 filings.

Frequently asked questions

Who has been buying Diamond Electric Holdings Co., Ltd. stock?: 15 distinct investors have filed 37 disclosed large-shareholding filings in Diamond Electric Holdings Co., Ltd. (6699), most recently on 2026-05-14. 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 Diamond Electric Holdings Co., Ltd. have?: Diamond Electric Holdings Co., Ltd. has 37 buy-side and 50 sell-side disclosures on record, covering ¥28.3B ($182.8M) in total reported value, spanning 2021-03-24 to 2026-05-14.
Where does StockDrifts get Diamond Electric 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 Diamond Electric Holdings Co., Ltd.. For how StockDrifts scores these disclosures, see the Japan insider signal tier research, or browse every Japanese stock we track.