Who has been buying DIGITAL HEARTS HOLDINGS Co., Ltd. stock?

16 distinct investors have filed 22 disclosed large-shareholding filings in DIGITAL HEARTS HOLDINGS Co., Ltd. (3676), most recently on 2026-03-03. 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 DIGITAL HEARTS HOLDINGS Co., Ltd. have?

DIGITAL HEARTS HOLDINGS Co., Ltd. has 22 buy-side and 16 sell-side disclosures on record, covering ¥18.6B ($119.7M) in total reported value, spanning 2021-04-26 to 2026-03-03.

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.

DIGITAL HEARTS HOLDINGS Co., Ltd. 3676

Company

株式会社デジタルハーツホールディングスDIGITAL HEARTS HOLDINGS Co., Ltd.

Investors

Buys

Total Value

¥18.6B ($119.7M)

Avg Return

-44.00%

Last Filing

2026-03-03

DIGITAL HEARTS HOLDINGS Co., Ltd. (3676) has 22 disclosed large-shareholding filings and 16 disclosed disposals on record, filed by 16 distinct investors. Together those filings cover ¥18.6B ($119.7M) in reported transaction value. The earliest filing StockDrifts holds for DIGITAL HEARTS HOLDINGS Co., Ltd. is dated 2021-04-26; the most recent is 2026-03-03. Across these filings the average return since disclosure is -44.00%, 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
2026-09-24	BUY	unknown	野村アセットマネジメント株式会社	other	316.1K	¥1,048	+0.2%	¥331M ($2.1M)
2026-09-24	BUY	unknown	ノムラインターナショナルピーエルシー NOMURA INTERNATIONAL PLC	other	916.7K	¥1,048	+0.2%	¥961M ($6.2M)
2026-09-24	BUY	unknown	野村證券株式会社	other	54.0K	¥1,048	+0.2%	¥57M ($365K)
2026-09-07	BUY	unknown	A-1合同会社	activist	1.3M	¥1,057	-	-
2026-09-07	BUY	unknown	宮澤栄一	activist	9.4M	¥1,057	-	-
2026-08-13	BUY	unknown	宮澤栄一	activist	9.4M	¥1,058	-	-
2026-08-13	BUY	unknown	A-1合同会社	activist	1.3M	¥1,058	-	-
2026-03-03	BUY	Market Buy	光通信株式会社 Hikari Tsushin K.K.	passive	1.2M	¥930	+12.9%	¥1.1B ($7.2M)
2025-12-03	SELL	unknown	ジー・ダブル・アンド・ケー・インベストメント・マネジメント・エルエルシー(GW&K INVESTMENT MANAGEMENT, LLC) GW&K INVESTMENT MANAGEMENT, LLC	other	810.4K	¥941	-11.6%	¥542M ($3.5M)
2025-11-04	BUY	Market Buy	宮澤栄一 Eiichi Miyazawa	activist	9.4M	¥956	+9.8%	¥37M ($236K)
2025-11-04	BUY	Market Buy	A-1合同会社 A-1 LLC	activist	1.3M	¥956	-	-
2025-03-07	SELL	unknown	エフエムアールエルエルシー(FMR LLC) FMR LLC	other	1.1M	¥1,056	+0.6%	¥275M ($1.8M)
2025-01-10	SELL	unknown	エフエムアールエルエルシー(FMR LLC) FMR LLC	other	1.3M	¥816	-28.7%	¥199M ($1.3M)
2024-10-22	SELL	unknown	エフエムアールエルエルシー(FMR LLC) FMR LLC	other	1.6M	¥825	-27.3%	¥211M ($1.4M)
2023-12-14	BUY	Market Buy	A-1合同会社 A-1 LLC	activist	1.3M	¥937	-	-
2023-12-14	BUY	Market Buy	宮澤栄一 Eiichi Miyazawa	activist	9.4M	¥937	+12.1%	¥233M ($1.5M)
2023-12-07	SELL	unknown	エフエムアールエルエルシー(FMR LLC) FMR LLC	other	1.8M	¥978	-7.4%	¥262M ($1.7M)
2023-11-24	BUY	Market Buy	宮澤栄一 Eiichi Miyazawa	activist	9.1M	¥952	+10.3%	¥243M ($1.6M)
2023-11-24	BUY	Market Buy	A-1合同会社 A-1 LLC	activist	1.3M	¥952	-	-
2023-11-09	BUY	unknown	宮澤栄一 Eiichi Miyazawa	activist	8.9M	¥951	-	-
2023-11-09	BUY	unknown	A-1合同会社 A-1 LLC	activist	1.3M	¥951	-	-
2023-09-07	SELL	unknown	エフエムアールエルエルシー(FMR LLC) FMR LLC	other	2.1M	¥1,130	+7.1%	¥308M ($2.0M)
2023-09-04	SELL	unknown	宮澤栄一 Eiichi Miyazawa	activist	8.9M	¥1,143	+8.1%	¥123M ($793K)
2023-09-04	BUY	unknown	A-1合同会社 A-1 LLC	activist	1.3M	¥1,143	-	-
2023-08-02	BUY	unknown	ジー・ダブル・アンド・ケー・インベストメント・マネジメント・エルエルシー(GW&K INVESTMENT MANAGEMENT, LLC) GW&K INVESTMENT MANAGEMENT, LLC	other	1.4M	¥1,395	-24.7%	¥1.9B ($12.5M)
2023-07-07	BUY	Market Buy	メリルリンチ・インターナショナル Merrill Lynch International	other	8.7K	¥1,304	-19.5%	¥28M ($181K)
2023-07-07	SELL	Market Buy	BofA証券株式会社 BofA Securities Japan Co Ltd	other	184	¥1,304	+19.5%	¥23M ($151K)
2023-07-07	BUY	Market Buy	ビーオブエー・セキュリティーズ・ヨーロッパ・エスエイ BofA Securities Europe SA	other	0	¥1,304	-	-
2023-07-07	SELL	Market Buy	ビーオブエー・セキュリティーズ・インク(BofA Securities BofA Securities, Inc.	other	0	¥1,304	+19.5%	¥19M ($121K)
2023-05-22	SELL	unknown	アセットマネジメントOne株式会社 Asset Management One Co., Ltd.	other	1.0M	¥1,347	+22.1%	¥354M ($2.3M)
2023-03-07	BUY	unknown	アセットマネジメントOne株式会社 Asset Management One Co., Ltd.	other	1.3M	¥1,548	-32.2%	¥2.0B ($12.9M)
2023-03-07	SELL	unknown	アセットマネジメントOneインターナショナル Asset Management One International Ltd.	unknown	0	¥1,548	+32.2%	¥63M ($406K)
2022-12-01	SELL	unknown	宮澤栄一 Eiichi Miyazawa	activist	9.0M	¥1,890	+44.4%	¥366M ($2.4M)
2022-12-01	BUY	unknown	A-1合同会社 A-1 LLC	activist	1.3M	¥1,890	-	-
2022-11-08	BUY	unknown	BofA証券株式会社 BofA Securities Japan Co Ltd	other	1.9M	¥1,994	-47.3%	¥3.5B ($22.8M)
2022-11-08	BUY	unknown	ビーオブエー・セキュリティーズ・ヨーロッパ・エスエイ BofA Securities Europe SA	other	100	¥1,994	-	-
2022-11-08	BUY	unknown	ビーオブエー・セキュリティーズ・インク(BofA Securities BofA Securities, Inc.	other	14.5K	¥1,994	-47.3%	¥2.9B ($18.4M)
2022-11-08	BUY	unknown	BofA証券株式会社 BofA Securities Japan Co Ltd	other	1.9M	¥1,994	-47.3%	¥3.5B ($22.8M)
2022-11-08	BUY	unknown	ビーオブエー・セキュリティーズ・ヨーロッパ・エスエイ BofA Securities Europe SA	other	100	¥1,994	-	-
2022-11-08	BUY	unknown	ビーオブエー・セキュリティーズ・インク(BofA Securities BofA Securities, Inc.	other	14.5K	¥1,994	-47.3%	¥2.9B ($18.4M)
2022-11-08	SELL	unknown	メリルリンチ・インターナショナル Merrill Lynch International	other	-11.8K	¥1,994	+56.6%	¥71M ($461K)
2022-11-08	SELL	unknown	メリルリンチ・インターナショナル Merrill Lynch International	other	-11.8K	¥1,994	+56.6%	¥71M ($461K)
2022-08-05	BUY	unknown	メリルリンチ・インターナショナル Merrill Lynch International	other	24.0K	¥1,956	-46.3%	¥47M ($303K)
2022-08-05	BUY	unknown	BofA証券株式会社 BofA Securities Japan Co Ltd	other	2.4M	¥1,956	-46.3%	¥4.7B ($30.0M)
2022-08-05	BUY	unknown	ビーオブエー・セキュリティーズ・ヨーロッパ・エスエイ BofA Securities Europe SA	other	400	¥1,956	-46.3%	¥782K ($5K)
2022-07-07	BUY	unknown	アセットマネジメントOne株式会社 Asset Management One Co., Ltd.	other	1.3M	¥1,782	-41.1%	¥2.3B ($15.1M)
2022-07-07	BUY	unknown	アセットマネジメントOneインターナショナル Asset Management One International Ltd.	other	39.9K	¥1,782	-41.1%	¥71M ($459K)
2021-12-10	BUY	Market Buy	宮澤栄一 Eiichi Miyazawa	activist	9.2M	¥2,544	-58.7%	¥24M ($157K)
2021-12-10	BUY	Market Buy	A-1合同会社 A-1 LLC	activist	1.3M	¥2,544	-	-
2021-10-22	BUY	Market Buy	レオス・キャピタルワークス株式会社 RHEOS CAPITAL WORKS Inc.	passive	660.7K	¥1,871	-43.9%	¥1.2B ($7.8M)

Showing the 50 most recent of 58 filings.

Frequently asked questions

Who has been buying DIGITAL HEARTS HOLDINGS Co., Ltd. stock?: 16 distinct investors have filed 22 disclosed large-shareholding filings in DIGITAL HEARTS HOLDINGS Co., Ltd. (3676), most recently on 2026-03-03. 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 DIGITAL HEARTS HOLDINGS Co., Ltd. have?: DIGITAL HEARTS HOLDINGS Co., Ltd. has 22 buy-side and 16 sell-side disclosures on record, covering ¥18.6B ($119.7M) in total reported value, spanning 2021-04-26 to 2026-03-03.
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.