Who has been buying SBI Sumishin Net Bank, Ltd. stock?

3 distinct investors have filed 4 disclosed large-shareholding filings in SBI Sumishin Net Bank, Ltd. (7163), most recently on 2025-07-17. 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 SBI Sumishin Net Bank, Ltd. have?

SBI Sumishin Net Bank, Ltd. has 4 buy-side and 2 sell-side disclosures on record, covering ¥400.0B ($2.6B) in total reported value, spanning 2023-04-04 to 2025-07-17.

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.

SBI Sumishin Net Bank, Ltd. 7163

Company

住信SBIネット銀行株式会社SBI Sumishin Net Bank, Ltd.

Investors

Buys

Total Value

¥400.0B ($2.6B)

Avg Return

+129.31%

Last Filing

2025-07-17

SBI Sumishin Net Bank, Ltd. (7163) has 4 disclosed large-shareholding filings and 2 disclosed disposals on record, filed by 3 distinct investors. Together those filings cover ¥400.0B ($2.6B) in reported transaction value. The earliest filing StockDrifts holds for SBI Sumishin Net Bank, Ltd. is dated 2023-04-04; the most recent is 2025-07-17. Across these filings the average return since disclosure is +129.31%, 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
2025-07-17	BUY	unknown	SBIホールディングス株式会社 SBI Holdings Co., Ltd.	strategic	51.6M	¥4,880	-	-
2025-07-17	BUY	unknown	株式会社NTTドコモ NTT DOCOMO, INC.	unknown	37.3M	¥4,880	-	¥181.9B ($1.2B)
2025-07-16	BUY	private	三井住友信託銀行株式会社 Sumitomo Mitsui Trust Bank,Limited	corporate	51.6M	¥4,875	-	-
2025-07-16	BUY	acquisition	株式会社NTTドコモ NTT DOCOMO, INC.	activist	37.3M	¥4,875	+0.0%	¥69.6B ($449.1M)
2025-07-16	BUY	acquisition	SBIホールディングス株式会社 SBI Holdings Co., Ltd.	unknown	51.6M	¥4,875	+0.0%	-
2025-07-16	BUY	private	株式会社NTTドコモ NTT DOCOMO, INC.	unknown	37.3M	¥4,875	-	¥181.7B ($1.2B)
2025-06-05	BUY	unknown	SBIホールディングス株式会社 SBI Holdings Co., Ltd.	strategic	51.6M	¥4,880	-	-
2025-06-04	BUY	private	三井住友信託銀行株式会社 Sumitomo Mitsui Trust Bank,Limited	corporate	51.6M	¥4,880	-	-
2023-05-09	BUY	unknown	三井住友信託銀行株式会社 Sumitomo Mitsui Trust Bank,Limited	corporate	51.6M	¥1,701	-	-
2023-05-08	SELL	Market Buy	SBIホールディングス株式会社 SBI Holdings, Inc.	strategic	51.6M	¥1,697	-187.3%	¥5.3B ($34.0M)
2023-05-08	SELL	unknown	三井住友信託銀行株式会社 Sumitomo Mitsui Trust Bank,Limited	corporate	51.6M	¥1,697	-187.3%	¥5.3B ($34.0M)
2023-04-05	BUY	Market Buy	SBIホールディングス株式会社 SBI Holdings, Inc.	strategic	54.7M	¥1,389	+251.0%	¥75.9B ($489.8M)
2023-04-04	BUY	acquisition	三井住友信託銀行株式会社 Sumitomo Mitsui Trust Bank,Limited	corporate	54.7M	¥1,331	+266.3%	¥72.8B ($469.4M)

Frequently asked questions

Who has been buying SBI Sumishin Net Bank, Ltd. stock?: 3 distinct investors have filed 4 disclosed large-shareholding filings in SBI Sumishin Net Bank, Ltd. (7163), most recently on 2025-07-17. 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 SBI Sumishin Net Bank, Ltd. have?: SBI Sumishin Net Bank, Ltd. has 4 buy-side and 2 sell-side disclosures on record, covering ¥400.0B ($2.6B) in total reported value, spanning 2023-04-04 to 2025-07-17.
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.