Who has been buying Double Standard Inc. stock?

6 distinct investors have filed 20 disclosed large-shareholding filings in Double Standard Inc. (3925), most recently on 2025-08-27. 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 Double Standard Inc. have?

Double Standard Inc. has 20 buy-side and 17 sell-side disclosures on record, covering ¥6.7B ($43.4M) in total reported value, spanning 2021-04-05 to 2025-08-27.

Where does StockDrifts get Double Standard Inc. 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.

Double Standard Inc. 3925

Company

株式会社ダブルスタンダードDouble Standard Inc.

Investors

Buys

Total Value

¥6.7B ($43.4M)

Avg Return

-41.89%

Last Filing

2025-08-27

Double Standard Inc. (3925) has 20 disclosed large-shareholding filings and 17 disclosed disposals on record, filed by 6 distinct investors. Together those filings cover ¥6.7B ($43.4M) in reported transaction value. The earliest filing StockDrifts holds for Double Standard Inc. is dated 2021-04-05; the most recent is 2025-08-27. 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 -41.89%, 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
2025-08-27	SELL	negotiated	中島正三 SHOZO NAKAJIMA	activist	3.4M	¥1,775	+21.0%	¥1.1B ($6.9M)
2023-10-06	BUY	Market Buy	SBIファイナンシャルサービシーズ株式会社 SBI FINANCIAL SERVICES Co., Ltd.	passive	2.7M	¥1,531	-8.4%	¥231M ($1.5M)
2023-04-04	BUY	Market Buy	SBIファイナンシャルサービシーズ株式会社 SBI FINANCIAL SERVICES Co., Ltd.	passive	2.5M	¥2,041	-31.3%	¥277M ($1.8M)
2023-01-11	BUY	Market Buy	SBIファイナンシャルサービシーズ株式会社 SBI FINANCIAL SERVICES Co., Ltd.	passive	2.4M	¥2,275	-38.4%	¥337M ($2.2M)
2022-08-29	SELL	Market Buy	SBI損害保険株式会社 SBI General Insurance Co., Ltd.	other	0	¥2,392	+41.4%	¥322M ($2.1M)
2022-08-29	BUY	Market Buy	SBIファイナンシャルサービシーズ株式会社 SBI FINANCIAL SERVICES Co., Ltd.	passive	2.2M	¥2,392	-41.4%	¥409M ($2.6M)
2022-08-18	BUY	unknown	野村アセットマネジメント株式会社 Nomura Asset Management Co., Ltd.	other	196.9K	¥2,610	-46.3%	¥514M ($3.3M)
2022-08-18	BUY	unknown	ノムラインターナショナルピーエルシー NOMURA INTERNATIONAL PLC	other	-500	¥2,610	-46.3%	¥28M ($183K)
2022-08-18	SELL	unknown	野村證券株式会社 Nomura Securities Co.,Ltd.	other	420.2K	¥2,610	+46.3%	¥471M ($3.0M)
2022-07-06	BUY	Market Buy	野村アセットマネジメント株式会社 Nomura Asset Management Co., Ltd.	other	197.3K	¥1,973	-28.9%	¥8M ($52K)
2022-07-06	SELL	Market Buy	ノムラインターナショナルピーエルシー NOMURA INTERNATIONAL PLC	other	-10.4K	¥1,973	+28.9%	¥289M ($1.9M)
2022-07-06	BUY	Market Buy	野村證券株式会社 Nomura Securities Co.,Ltd.	other	600.4K	¥1,973	-28.9%	¥3M ($17K)
2022-04-06	BUY	Market Buy	SBI損害保険株式会社 SBI General Insurance Co., Ltd.	passive	134.0K	¥2,112	-33.6%	¥283M ($1.8M)
2022-04-06	BUY	Market Buy	SBIファイナンシャルサービシーズ株式会社 SBI FINANCIAL SERVICES Co., Ltd.	passive	2.0M	¥2,112	-33.6%	¥304M ($2.0M)
2022-02-03	BUY	unknown	野村アセットマネジメント株式会社 Nomura Asset Management Co., Ltd.	other	192.5K	¥2,482	-43.5%	¥478M ($3.1M)
2022-02-03	BUY	unknown	ノムラインターナショナルピーエルシー NOMURA INTERNATIONAL PLC	other	2.0K	¥2,482	-43.5%	¥135M ($870K)
2022-02-03	SELL	unknown	野村證券株式会社 Nomura Securities Co.,Ltd.	other	599.3K	¥2,482	+43.5%	¥54M ($348K)
2021-12-10	SELL	negotiated	中島正三 SHOZO NAKAJIMA	activist	4.0M	¥3,070	+54.3%	¥1.3B ($8.7M)
2021-12-03	SELL	unknown	野村證券株式会社 Nomura Securities Co.,Ltd.	other	620.5K	¥3,395	+58.7%	¥290M ($1.9M)
2021-12-03	BUY	unknown	野村アセットマネジメント株式会社 Nomura Asset Management Co., Ltd.	other	192.2K	¥3,395	-58.7%	¥148M ($952K)
2021-12-03	SELL	unknown	ノムラインターナショナルピーエルシー NOMURA INTERNATIONAL PLC	other	81.3K	¥3,395	+58.7%	¥55M ($357K)
2021-10-20	SELL	unknown	野村アセットマネジメント株式会社 Nomura Asset Management Co., Ltd.	other	149.0K	¥3,745	+62.6%	¥66M ($427K)
2021-10-20	SELL	unknown	ノムラインターナショナルピーエルシー NOMURA INTERNATIONAL PLC	other	97.4K	¥3,745	+62.6%	¥2.5B ($15.9M)
2021-10-20	BUY	unknown	野村證券株式会社 Nomura Securities Co.,Ltd.	other	705.6K	¥3,745	-62.6%	¥2.6B ($17.0M)
2021-10-06	BUY	unknown	野村アセットマネジメント株式会社 Nomura Asset Management Co., Ltd.	other	166.6K	¥3,415	-59.0%	¥65M ($419K)
2021-10-06	SELL	unknown	ノムラインターナショナルピーエルシー NOMURA INTERNATIONAL PLC	other	756.1K	¥3,415	+59.0%	¥172M ($1.1M)
2021-10-06	BUY	unknown	野村證券株式会社 Nomura Securities Co.,Ltd.	other	8.6K	¥3,415	-59.0%	¥2.7B ($17.5M)
2021-09-06	BUY	unknown	野村アセットマネジメント株式会社 Nomura Asset Management Co., Ltd.	other	74.2K	¥3,875	-63.8%	¥37M ($238K)
2021-09-06	BUY	unknown	ノムラインターナショナルピーエルシー NOMURA INTERNATIONAL PLC	other	403.5K	¥3,875	-63.8%	¥395M ($2.5M)
2021-09-06	SELL	unknown	野村證券株式会社 Nomura Securities Co.,Ltd.	other	9.5K	¥3,875	+63.8%	¥379M ($2.4M)
2021-07-20	BUY	unknown	野村アセットマネジメント株式会社 Nomura Asset Management Co., Ltd.	other	64.3K	¥2,600	-46.1%	¥167M ($1.1M)
2021-07-20	SELL	unknown	ノムラインターナショナルピーエルシー NOMURA INTERNATIONAL PLC	other	301.6K	¥2,600	+46.1%	¥5M ($34K)
2021-07-20	BUY	unknown	野村證券株式会社 Nomura Securities Co.,Ltd.	other	107.0K	¥2,600	-46.1%	¥278M ($1.8M)
2021-07-05	BUY	unknown	野村アセットマネジメント株式会社 Nomura Asset Management Co., Ltd.	other	64.7K	¥2,700	-48.1%	¥29M ($189K)
2021-07-05	BUY	unknown	ノムラインターナショナルピーエルシー NOMURA INTERNATIONAL PLC	other	303.5K	¥2,700	-48.1%	¥306M ($2.0M)
2021-07-05	SELL	unknown	野村證券株式会社 Nomura Securities Co.,Ltd.	other	107.6K	¥2,700	+48.1%	¥291M ($1.9M)
2021-05-27	BUY	Market Buy	SBI損害保険株式会社 SBI General Insurance Co., Ltd.	passive	67.0K	¥2,410	-41.8%	¥161M ($1.0M)
2021-05-27	BUY	Market Buy	SBIファイナンシャルサービシーズ株式会社 SBI FINANCIAL SERVICES Co., Ltd.	passive	951.5K	¥2,410	-41.8%	¥2.3B ($14.6M)
2021-05-24	BUY	Market Buy	SBI損害保険株式会社 SBI General Insurance Co., Ltd.	passive	67.0K	¥2,460	-43.0%	¥165M ($1.1M)
2021-05-24	BUY	Market Buy	SBIファイナンシャルサービシーズ株式会社 SBI FINANCIAL SERVICES Co., Ltd.	passive	1.0M	¥2,460	-43.0%	¥2.5B ($16.1M)
2021-04-21	BUY	Market Buy	野村アセットマネジメント株式会社 Nomura Asset Management Co., Ltd.	other	53.6K	¥1,927.5	-27.3%	¥103M ($667K)
2021-04-21	SELL	Market Buy	ノムラインターナショナルピーエルシー NOMURA INTERNATIONAL PLC	other	190.4K	¥1,927.5	+27.3%	¥292M ($1.9M)
2021-04-21	BUY	Market Buy	野村證券株式会社 Nomura Securities Co.,Ltd.	other	215.1K	¥1,927.5	-27.3%	¥291M ($1.9M)
2021-04-05	BUY	unknown	野村アセットマネジメント株式会社 Nomura Asset Management Co., Ltd.	other	53.7K	¥1,859.985	-24.6%	¥3M ($16K)
2021-04-05	SELL	unknown	ノムラインターナショナルピーエルシー NOMURA INTERNATIONAL PLC	other	341.6K	¥1,859.985	+24.6%	¥20M ($130K)
2021-04-05	SELL	unknown	野村證券株式会社 Nomura Securities Co.,Ltd.	other	64.8K	¥1,859.985	+24.6%	¥11M ($73K)

Frequently asked questions

Who has been buying Double Standard Inc. stock?: 6 distinct investors have filed 20 disclosed large-shareholding filings in Double Standard Inc. (3925), most recently on 2025-08-27. 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 Double Standard Inc. have?: Double Standard Inc. has 20 buy-side and 17 sell-side disclosures on record, covering ¥6.7B ($43.4M) in total reported value, spanning 2021-04-05 to 2025-08-27.
Where does StockDrifts get Double Standard Inc. 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 Double Standard Inc.. For how StockDrifts scores these disclosures, see the Japan insider signal tier research, or browse every Japanese stock we track.