StockDrifts LogoStockDrifts

The Keiyo Bank, Ltd. 8544

Company
株式会社京葉銀行The Keiyo Bank, Ltd.
Investors
7
Buys
4
Total Value
¥5.5B ($35.8M)
Avg Return
+30.35%
Last Filing
2026-01-20

The Keiyo Bank, Ltd. (8544) has 4 disclosed large-shareholding filings and 5 disclosed disposals on record, filed by 7 distinct investors. Together those filings cover ¥5.5B ($35.8M) in reported transaction value. The earliest filing StockDrifts holds for The Keiyo Bank, Ltd. is dated 2021-05-21; the most recent is 2026-01-20. 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 +30.35%, measured from each filing date to the latest available close.

Price & insider activity (12 months)

Recent filings

DateTypeSourceInsiderPurposeSharesPrice at filingReturnValue
2026-01-20BUYMarket Buy
ウエリントン・マネージメント・インターナショナル・リミテッド
Wellington Management International Ltd
other1.3M¥1,861+19.3%¥2.9B ($18.6M)
2026-01-20BUYMarket Buy
ウエリントン・マネージメント・カンパニー・エルエルピー
Wellington Management Company LLP
other7.2M¥1,861+19.3%¥15.9B ($102.4M)
2025-12-03BUYunknown
ウエリントン・マネージメント・インターナショナル・リミテッド
Wellington Management International Ltd
other1.2M¥1,570+41.4%¥2.7B ($17.2M)
2025-12-03BUYunknown
ウエリントン・マネージメント・カンパニー・エルエルピー
Wellington Management Company LLP
other5.8M¥1,570+41.4%¥12.8B ($82.4M)
2023-03-22SELLnegotiated
日興アセットマネジメント株式会社
Nikko Asset Management Co.,Ltd.
other1.3M¥574-286.8%¥92M ($595K)
2023-03-22SELLnegotiated
三井住友トラスト・アセットマネジメント株式会社
Sumitomo Mitsui Trust Asset Management Co.,Ltd.
other3.5M¥574-286.8%¥792M ($5.1M)
2023-03-22SELLnegotiated
三井住友信託銀行株式会社
Sumitomo Mitsui Trust Bank,Limited
strategic236.0K¥574-286.8%¥123M ($794K)
2021-05-21SELLunknown
三井住友海上火災保険株式会社
Mitsui Sumitomo Insurance Co.,Ltd.
strategic3.8M¥421-427.3%¥427M ($2.8M)
2021-05-21SELLunknown
あいおいニッセイ同和損害保険株式会社
Aioi Nissay Dowa Insurance Co.,Ltd.
strategic1.3M¥421-427.3%¥281M ($1.8M)

Frequently asked questions

Who has been buying The Keiyo Bank, Ltd. stock?
7 distinct investors have filed 4 disclosed large-shareholding filings in The Keiyo Bank, Ltd. (8544), most recently on 2026-01-20. 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 The Keiyo Bank, Ltd. have?
The Keiyo Bank, Ltd. has 4 buy-side and 5 sell-side disclosures on record, covering ¥5.5B ($35.8M) in total reported value, spanning 2021-05-21 to 2026-01-20.
Where does StockDrifts get The Keiyo Bank, Ltd. 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 The Keiyo Bank, Ltd.. For how StockDrifts scores these disclosures, see the Japan insider signal tier research, or browse every Japanese stock we track.