Who has been buying BroadBand Security, Inc. stock?

8 distinct investors have filed 4 disclosed large-shareholding filings in BroadBand Security, Inc. (4398), most recently on 2025-01-27. 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 BroadBand Security, Inc. have?

BroadBand Security, Inc. has 4 buy-side and 12 sell-side disclosures on record, covering ¥3.9B ($25.0M) in total reported value, spanning 2021-07-26 to 2025-01-27.

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.

BroadBand Security, Inc. 4398

Company

株式会社ブロードバンドセキュリティBroadBand Security, Inc.

Investors

Buys

Total Value

¥3.9B ($25.0M)

Avg Return

-2.54%

Last Filing

2025-01-27

BroadBand Security, Inc. (4398) has 4 disclosed large-shareholding filings and 12 disclosed disposals on record, filed by 8 distinct investors. Together those filings cover ¥3.9B ($25.0M) in reported transaction value. The earliest filing StockDrifts holds for BroadBand Security, Inc. is dated 2021-07-26; the most recent is 2025-01-27. Across these filings the average return since disclosure is -2.54%, 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
2025-01-27	BUY	Market Buy	SBIインキュベーション株式会社 SBI Incubation Co., Ltd.	passive	698.6K	¥1,452	-	-
2025-01-27	SELL	Market Buy	SBI FinTech Solutions株式会社 SBI FinTech Solutions Co., Ltd.	other	0	¥1,452	+9.2%	¥14M ($90K)
2025-01-23	BUY	unknown	株式会社IDホールディングス ID Holdings Corporation	strategic	964.0K	¥1,460	-9.7%	¥1.4B ($9.1M)
2024-11-21	SELL	Market Buy	SBIインキュベーション株式会社 SBI Incubation Co., Ltd.	passive	698.6K	¥1,495	+11.8%	¥683K ($4K)
2024-11-21	SELL	Market Buy	SBI FinTech Solutions株式会社 SBI FinTech Solutions Co., Ltd.	strategic	964.0K	¥1,495	+11.8%	¥683K ($4K)
2024-08-15	SELL	unknown	兼松エレクトロニクス株式会社 KANEMATSU ELECTRONICS LTD.	strategic	439.5K	¥1,484	+11.1%	¥678K ($4K)
2024-08-09	SELL	unknown	グローバルセキュリティエキスパート株式会社 Global Security Experts Inc.	strategic	1.0M	¥1,460	+9.7%	¥667K ($4K)
2023-11-17	SELL	Market Buy	SBIインキュベーション株式会社 SBI Incubation Co., Ltd.	passive	698.6K	¥1,195	-10.4%	¥816M ($5.3M)
2023-11-17	BUY	unknown	グローバルセキュリティエキスパート株式会社 Global Security Experts Inc.	strategic	1.0M	¥1,195	+10.4%	¥1.2B ($7.8M)
2023-11-17	BUY	unknown	兼松エレクトロニクス株式会社 KANEMATSU ELECTRONICS LTD.	strategic	439.5K	¥1,195	+10.4%	¥525M ($3.4M)
2023-11-17	SELL	Market Buy	SBI FinTech Solutions株式会社 SBI FinTech Solutions Co., Ltd.	strategic	964.0K	¥1,195	-10.4%	¥1M ($7K)
2023-11-17	SELL	Market Buy	SBIホールディングス株式会社 SBI Holdings Co., Ltd.	other	0	¥1,195	-10.4%	¥666M ($4.3M)
2022-03-01	SELL	Market Buy	SBI FinTech Solutions株式会社 SBI FinTech Solutions Co., Ltd.	strategic	964.0K	¥1,530	+13.8%	¥209M ($1.3M)
2022-03-01	BUY	Market Buy	SBIホールディングス株式会社 SBI Holdings Co., Ltd.	passive	556.8K	¥1,530	-	¥852M ($5.5M)
2022-03-01	SELL	Market Buy	SBIインキュベーション株式会社 SBI Incubation Co., Ltd.	passive	1.4M	¥1,530	+13.8%	¥298M ($1.9M)
2022-02-25	SELL	Market Buy	モーニングスター株式会社 Morningstar Japan K.K.	passive	44	¥1,150	-14.7%	¥640M ($4.1M)
2021-11-02	BUY	unknown	持塚朗(相続人代表持塚千乃) Akira Mochizuka	unknown	0	¥1,384	-	¥490M ($3.2M)
2021-11-02	SELL	unknown	持塚朗(相続人代表持塚千乃) Akira Mochizuka	unknown	0	¥1,384	+4.7%	¥500M ($3.2M)
2021-07-26	BUY	Market Buy	モーニングスター株式会社 Morningstar Japan K.K.	passive	556.8K	¥1,307	-	¥728M ($4.7M)
2021-07-26	BUY	Market Buy	モーニングスター株式会社 Morningstar Japan K.K.	passive	556.8K	¥1,307	+0.9%	¥728M ($4.7M)

Frequently asked questions

Who has been buying BroadBand Security, Inc. stock?: 8 distinct investors have filed 4 disclosed large-shareholding filings in BroadBand Security, Inc. (4398), most recently on 2025-01-27. 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 BroadBand Security, Inc. have?: BroadBand Security, Inc. has 4 buy-side and 12 sell-side disclosures on record, covering ¥3.9B ($25.0M) in total reported value, spanning 2021-07-26 to 2025-01-27.
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.