Who has been buying Shinsei Bank, Limited stock?

11 distinct investors have filed 31 disclosed large-shareholding filings in Shinsei Bank, Limited (8303), most recently on 2026-03-26. 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 Shinsei Bank, Limited have?

Shinsei Bank, Limited has 31 buy-side and 12 sell-side disclosures on record, covering ¥2.33T ($15.0B) in total reported value, spanning 2021-03-17 to 2026-03-26.

Where does StockDrifts get Shinsei Bank, Limited 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.

Shinsei Bank, Limited 8303

Company

株式会社新生銀行Shinsei Bank, Limited

Investors

Buys

Total Value

¥2.33T ($15.0B)

Avg Return

-19.20%

Last Filing

2026-03-26

Shinsei Bank, Limited (8303) has 31 disclosed large-shareholding filings and 12 disclosed disposals on record, filed by 11 distinct investors. Together those filings cover ¥2.33T ($15.0B) in reported transaction value. The earliest filing StockDrifts holds for Shinsei Bank, Limited is dated 2021-03-17; the most recent is 2026-03-26. 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 -19.20%, 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
2026-03-26	SELL	Market Buy	SBI地銀ホールディングス株式会社	other	0	¥1,692	+1.0%	-
2026-03-26	BUY	Market Buy	SBIホールディングス株式会社	strategic	631.7M	¥1,692	-1.0%	¥1.1T ($6.8B)
2026-01-19	BUY	unknown	SBI地銀ホールディングス株式会社	strategic	490.0M	¥2,081	+19.5%	¥820.5B ($5.3B)
2026-01-19	SELL	unknown	SBIホールディングス株式会社	strategic	141.7M	¥2,081	+19.5%	¥237.3B ($1.5B)
2025-12-24	BUY	acquisition	SBI地銀ホールディングス株式会社	strategic	490.0M	¥1,746	-4.1%	¥820.5B ($5.3B)
2025-12-24	BUY	acquisition	SBIホールディングス株式会社	strategic	175.0M	¥1,746	-4.1%	¥293.0B ($1.9B)
2023-09-28	BUY	acquisition	株式会社エスグラントコーポレーション S-Grant Corporation Co., Ltd.	activist	20.0M	¥2,766	-39.5%	¥55.3B ($356.9M)
2023-09-08	BUY	unknown	預金保険機構 Deposit Insurance Corporation of Japan	unknown	26.9M	¥2,794	-40.1%	¥75.2B ($485.1M)
2023-09-08	BUY	unknown	預金保険機構 Deposit Insurance Corporation of Japan	other	26.9M	¥2,794	-40.1%	¥75.2B ($485.1M)
2023-09-08	BUY	unknown	株式会社整理回収機構 The Resolution and Collection Corporation	other	20.0M	¥2,794	-40.1%	¥55.9B ($360.5M)
2023-09-08	BUY	unknown	SBI地銀ホールディングス株式会社 SBI Regional Bank Holdings, Co., Ltd.	activist	109.7M	¥2,794	-40.1%	¥306.5B ($2.0B)
2023-06-30	BUY	block_purchase	預金保険機構 Deposit Insurance Corporation of Japan	unknown	26.9M	¥2,810.5	-40.4%	¥75.6B ($488.0M)
2023-06-30	BUY	unknown	預金保険機構 Deposit Insurance Corporation of Japan	other	26.9M	¥2,810.5	-40.4%	¥75.6B ($488.0M)
2023-06-30	BUY	unknown	株式会社整理回収機構 The Resolution and Collection Corporation	other	20.0M	¥2,810.5	-40.4%	¥56.2B ($362.6M)
2023-06-30	BUY	block_purchase	SBI地銀ホールディングス株式会社 SBI Regional Bank Holdings, Co., Ltd.	activist	109.7M	¥2,810.5	-40.4%	¥21.2B ($136.8M)
2023-05-19	BUY	unknown	預金保険機構 Deposit Insurance Corporation of Japan	other	26.9M	¥2,814	-40.5%	¥15.8B ($102.0M)
2023-05-19	BUY	block_purchase	預金保険機構 Deposit Insurance Corporation of Japan	unknown	26.9M	¥2,814	-40.5%	¥75.7B ($488.6M)
2023-05-19	BUY	block_purchase	預金保険機構 Deposit Insurance Corporation of Japan	other	26.9M	¥2,814	-40.5%	¥15.8B ($102.0M)
2023-05-19	BUY	block_purchase	株式会社整理回収機構 The Resolution and Collection Corporation	other	20.0M	¥2,814	-40.5%	¥11.7B ($75.6M)
2023-05-19	BUY	block_purchase	SBI地銀ホールディングス株式会社 SBI Regional Bank Holdings, Co., Ltd.	activist	102.2M	¥2,814	-40.5%	¥59.9B ($386.8M)
2023-05-19	BUY	unknown	株式会社整理回収機構 The Resolution and Collection Corporation	other	20.0M	¥2,814	-40.5%	¥11.7B ($75.6M)
2023-01-11	BUY	block_purchase	預金保険機構 Deposit Insurance Corporation of Japan	other	26.9M	¥2,257	-25.8%	¥3.5B ($22.6M)
2023-01-11	BUY	block_purchase	株式会社整理回収機構 The Resolution and Collection Corporation	other	20.0M	¥2,257	-25.8%	¥2.6B ($17.0M)
2022-10-28	BUY	block_purchase	SBI地銀ホールディングス株式会社 SBI Regional Bank Holdings, Co., Ltd.	activist	102.2M	¥2,234	-25.0%	¥5.6B ($36.2M)
2022-02-08	BUY	unknown	SBI地銀ホールディングス株式会社 SBI Regional Bank Holdings, Co., Ltd.	activist	99.7M	¥2,324	-27.9%	¥99.3B ($640.8M)
2022-02-08	SELL	unknown	SBIホールディングス株式会社 SBI Holdings Co., Ltd.	other	0	¥2,324	+27.9%	¥99.3B ($640.8M)
2021-12-20	SELL	unknown	野村アセットマネジメント株式会社 Nomura Asset Management Co., Ltd.	other	5.4M	¥1,831	+8.6%	¥1.6B ($10.1M)
2021-12-20	BUY	unknown	ノムラセキュリテーズインターナショナル NOMURA SECURITIES INTERNATIONAL,Inc.	other	318.5K	¥1,831	-8.6%	¥569M ($3.7M)
2021-12-20	SELL	unknown	ノムラインターナショナルピーエルシー NOMURA INTERNATIONAL PLC	other	7.0M	¥1,831	+8.6%	¥1.7B ($11.0M)
2021-12-20	BUY	unknown	野村證券株式会社 Nomura Securities Co.,Ltd.	other	81.4K	¥1,831	-8.6%	¥8.5B ($55.1M)
2021-12-17	SELL	unknown	株式会社エスグラントコーポレーション S-Grant Corporation Co., Ltd.	unknown	0	¥1,998	+16.2%	¥10.4B ($67.1M)
2021-12-17	BUY	unknown	SBI地銀ホールディングス株式会社 SBI Regional Bank Holdings, Co., Ltd.	activist	56.9M	¥1,998	-16.2%	¥113.7B ($733.6M)
2021-12-17	BUY	unknown	SBIホールディングス株式会社 SBI Holdings Co., Ltd.	activist	42.7M	¥1,998	-16.2%	¥85.4B ($550.9M)
2021-12-17	SELL	unknown	野村絢 Aya Nomura (Murakami family)	unknown	0	¥1,998	+16.2%	¥10.8B ($69.8M)
2021-12-17	SELL	unknown	株式会社シティインデックスイレブンス City Index Eleven Co., Ltd.	unknown	0	¥1,998	+16.2%	¥26.2B ($169.0M)
2021-12-07	BUY	unknown	株式会社シティインデックスイレブンス City Index Eleven Co., Ltd.	activist	13.1M	¥1,963	-14.7%	¥25.7B ($165.8M)
2021-12-07	SELL	unknown	野村アセットマネジメント株式会社 Nomura Asset Management Co., Ltd.	other	6.3M	¥1,963	+14.7%	¥2.2B ($14.4M)
2021-12-07	BUY	unknown	ノムラセキュリテーズインターナショナル NOMURA SECURITIES INTERNATIONAL,Inc.	other	0	¥1,963	-14.7%	-
2021-12-07	BUY	unknown	ノムラインターナショナルピーエルシー NOMURA INTERNATIONAL PLC	other	7.9M	¥1,963	-14.7%	¥9.3B ($60.0M)
2021-12-07	BUY	unknown	株式会社エスグラントコーポレーション S-Grant Corporation Co., Ltd.	activist	5.2M	¥1,963	-14.7%	¥5.1B ($33.1M)
2021-12-07	BUY	unknown	野村絢 Aya Nomura (Murakami family)	activist	5.4M	¥1,963	-14.7%	¥10.6B ($68.5M)
2021-12-07	SELL	unknown	野村證券株式会社 Nomura Securities Co.,Ltd.	other	3.1M	¥1,963	+14.7%	¥2.3B ($15.1M)
2021-12-06	BUY	unknown	野村絢 Aya Nomura (Murakami family)	activist	5.4M	¥1,966	-14.8%	¥10.6B ($68.6M)
2021-12-06	BUY	unknown	株式会社エスグラントコーポレーション S-Grant Corporation Co., Ltd.	activist	2.6M	¥1,966	-14.8%	¥5.1B ($32.8M)
2021-12-06	SELL	unknown	株式会社シティインデックスイレブンス City Index Eleven Co., Ltd.	activist	13.1M	¥1,966	+14.8%	¥1.5B ($9.5M)
2021-11-19	BUY	Market Buy	野村絢 Aya Nomura (Murakami family)	activist	5.4M	¥1,833	-8.7%	¥9.9B ($63.9M)
2021-11-19	BUY	Market Buy	株式会社シティインデックスイレブンス City Index Eleven Co., Ltd.	activist	13.8M	¥1,833	-8.7%	¥5.4B ($34.6M)
2021-11-16	BUY	Market Buy	株式会社シティインデックスイレブンス City Index Eleven Co., Ltd.	activist	10.9M	¥1,814	-7.7%	¥4.8B ($30.9M)
2021-11-16	BUY	Market Buy	野村絢 Aya Nomura (Murakami family)	activist	5.4M	¥1,814	-7.7%	¥9.8B ($63.3M)
2021-11-12	BUY	acquisition	野村絢 Aya Nomura (Murakami family)	activist	5.4M	¥1,830	-8.5%	¥9.9B ($63.8M)

Showing the 50 most recent of 63 filings.

Frequently asked questions

Who has been buying Shinsei Bank, Limited stock?: 11 distinct investors have filed 31 disclosed large-shareholding filings in Shinsei Bank, Limited (8303), most recently on 2026-03-26. 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 Shinsei Bank, Limited have?: Shinsei Bank, Limited has 31 buy-side and 12 sell-side disclosures on record, covering ¥2.33T ($15.0B) in total reported value, spanning 2021-03-17 to 2026-03-26.
Where does StockDrifts get Shinsei Bank, Limited 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 Shinsei Bank, Limited. For how StockDrifts scores these disclosures, see the Japan insider signal tier research, or browse every Japanese stock we track.