Who has been buying Keio Corporation stock?

18 distinct investors have filed 12 disclosed large-shareholding filings in Keio Corporation (9008), most recently on 2025-09-19. 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 Keio Corporation have?

Keio Corporation has 12 buy-side and 21 sell-side disclosures on record, covering ¥768M ($5.0M) in total reported value, spanning 2021-04-21 to 2025-09-19.

Where does StockDrifts get Keio Corporation 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.

Keio Corporation 9008

Company

京王電鉄株式会社Keio Corporation

Investors

Buys

Total Value

¥768M ($5.0M)

Avg Return

-10.41%

Last Filing

2025-09-19

Keio Corporation (9008) has 12 disclosed large-shareholding filings and 21 disclosed disposals on record, filed by 18 distinct investors. Together those filings cover ¥768M ($5.0M) in reported transaction value. The earliest filing StockDrifts holds for Keio Corporation is dated 2021-04-21; the most recent is 2025-09-19. 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 -10.41%, 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
2026-07-06	BUY	Market Buy	ブラックロック・インベストメント・マネジメント(ユーケー)リミテッドLimited) BlackRock Investment Management (UK	passive	6.5M	¥755.3	-0.3%	¥4.9B ($31.6M)
2026-07-06	BUY	Market Buy	ブラックロック・インスティテューショナル・トラスト・カンパニー、エヌ.エイ. BlackRock Institutional Trust Company, N.A.	passive	5.3M	¥755.3	-0.3%	¥4.0B ($25.9M)
2026-07-06	BUY	Market Buy	ブラックロック・ファンド・アドバイザーズ BlackRock Fund Advisors	passive	7.1M	¥755.3	-0.3%	¥5.4B ($34.7M)
2026-07-06	BUY	Market Buy	ブラックロック・アセット・マネジメント・アイルランド・リミテッド BlackRock Asset Management Ireland Limited	passive	1.3M	¥755.3	-0.3%	¥977M ($6.3M)
2026-07-06	BUY	Market Buy	ブラックロック・ファンド・マネジャーズ・リミテッド BlackRock Fund Managers Limited	passive	732.9K	¥755.3	-0.3%	¥554M ($3.6M)
2026-07-06	BUY	Market Buy	ブラックロック・フィナンシャル・マネジメント・インク BlackRock Financial Management, Inc.	passive	624.7K	¥755.3	-0.3%	¥472M ($3.0M)
2026-07-06	BUY	Market Buy	ブラックロック・ジャパン株式会社	passive	9.5M	¥755.3	-0.3%	¥7.1B ($46.1M)
2026-06-03	BUY	unknown	野村アセットマネジメント株式会社	other	25.8M	¥728.2	+2.8%	¥18.8B ($121.3M)
2026-06-03	BUY	unknown	ノムラインターナショナルピーエルシー NOMURA INTERNATIONAL PLC	other	518.6K	¥728.2	+2.8%	¥378M ($2.4M)
2026-06-03	BUY	unknown	野村證券株式会社	other	3.4M	¥728.2	+2.8%	¥2.5B ($16.1M)
2025-09-19	BUY	Market Buy	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.	other	3.0M	¥778	+1.4%	¥289M ($1.9M)
2025-09-19	BUY	Market Buy	アモーヴァ・アセットマネジメント株式会社 Amova Asset Management Co., Ltd.	other	2.5M	¥778	+1.4%	¥251M ($1.6M)
2025-09-19	BUY	Market Buy	三井住友信託銀行株式会社 Sumitomo Mitsui Trust Bank,Limited	strategic	4.0M	¥778	+1.4%	¥214M ($1.4M)
2024-04-05	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	4.7M	¥822.4	-4.1%	¥21M ($136K)
2024-04-05	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	459.6K	¥822.4	+4.1%	¥1.2B ($7.5M)
2024-04-05	SELL	Market Buy	野村證券株式会社 Nomura Securities Co.,Ltd.	other	115.4K	¥822.4	+4.1%	¥962M ($6.2M)
2024-04-04	SELL	negotiated	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.	other	2.9M	¥811.6	+2.8%	¥981M ($6.3M)
2024-04-04	BUY	negotiated	三井住友信託銀行株式会社 Sumitomo Mitsui Trust Bank,Limited	strategic	4.0M	¥811.6	-2.8%	¥3.2B ($20.9M)
2024-04-04	SELL	negotiated	日興アセットマネジメント株式会社 Nikko Asset Management Co.,Ltd.	other	2.3M	¥811.6	+2.8%	¥73M ($471K)
2023-12-07	BUY	unknown	野村アセットマネジメント株式会社 Nomura Asset Management Co., Ltd.	other	4.7M	¥861.4	-8.4%	¥4.1B ($26.2M)
2023-12-07	BUY	unknown	ノムラインターナショナルピーエルシー NOMURA INTERNATIONAL PLC	other	1.9M	¥861.4	-8.4%	¥1.6B ($10.5M)
2023-12-07	BUY	unknown	野村證券株式会社 Nomura Securities Co.,Ltd.	other	11.2K	¥861.4	-8.4%	¥10M ($62K)
2023-12-06	BUY	Market Buy	ブラックロック・ジャパン株式会社 BlackRock Japan Co., Ltd.	passive	1.8M	¥849.6	-7.2%	¥98M ($634K)
2023-12-06	SELL	Market Buy	ブラックロック・インベストメント・マネジメント(ユーケー)リミテッドLimited) BlackRock Investment Management (UK	passive	0	¥849.6	+7.2%	¥186M ($1.2M)
2023-12-06	SELL	Market Buy	ブラックロック・インスティテューショナル・トラスト・カンパニー、エヌ.エイ.(BlackRock Institutional Trust Company BlackRock Institutional Trust Company, N.A.	passive	817.0K	¥849.6	+7.2%	¥754M ($4.9M)
2023-12-06	SELL	Market Buy	ブラックロック・ファンド・アドバイザーズ BlackRock Fund Advisors	passive	1.2M	¥849.6	+7.2%	¥612M ($3.9M)
2023-12-06	SELL	Market Buy	ブラックロック・アセット・マネジメント・アイルランド・リミテッド BlackRock Asset Management Ireland Limited	passive	179.0K	¥849.6	+7.2%	¥295M ($1.9M)
2023-12-06	SELL	Market Buy	ブラックロック・ライフ・リミテッド BlackRock Life Limited	passive	0	¥849.6	+7.2%	¥240M ($1.6M)
2023-12-06	BUY	Market Buy	ブラックロック・ファンド・マネジャーズ・リミテッド BlackRock Fund Managers Limited	passive	252.9K	¥849.6	-7.2%	¥215M ($1.4M)
2023-12-06	BUY	Market Buy	ブラックロック(ネザーランド)BVBV) BlackRock (Netherlands	passive	145.8K	¥849.6	-7.2%	¥124M ($799K)
2023-12-06	SELL	Market Buy	ブラックロック・インベストメント・マネジメント・エルエルシー BlackRock Investment Management LLC	passive	0	¥849.6	+7.2%	¥109M ($705K)
2023-04-20	SELL	negotiated	日興アセットマネジメント株式会社 Nikko Asset Management Co.,Ltd.	other	2.4M	¥1,004	+21.4%	¥13M ($83K)
2023-04-20	SELL	negotiated	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.	other	4.1M	¥1,004	+21.4%	¥39M ($250K)
2023-04-20	SELL	negotiated	三井住友信託銀行株式会社 Sumitomo Mitsui Trust Bank,Limited	strategic	4.0M	¥1,004	+21.4%	¥1.7B ($10.7M)
2023-04-06	BUY	negotiated	日興アセットマネジメント株式会社 Nikko Asset Management Co.,Ltd.	other	2.4M	¥954	-17.3%	¥2.3B ($15.0M)
2023-04-06	SELL	negotiated	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.	other	4.1M	¥954	+17.3%	¥37M ($237K)
2023-04-06	BUY	negotiated	三井住友信託銀行株式会社 Sumitomo Mitsui Trust Bank,Limited	strategic	5.6M	¥954	-17.3%	¥5.4B ($34.8M)
2023-01-19	BUY	negotiated	日興アセットマネジメント株式会社 Nikko Asset Management Co.,Ltd.	other	2.4M	¥905	-12.8%	¥105M ($676K)
2023-01-19	BUY	negotiated	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.	other	4.1M	¥905	-12.8%	¥163M ($1.1M)
2023-01-19	BUY	negotiated	三井住友信託銀行株式会社 Sumitomo Mitsui Trust Bank,Limited	strategic	5.6M	¥905	-12.8%	¥5.1B ($33.0M)
2022-10-20	SELL	negotiated	日興アセットマネジメント株式会社 Nikko Asset Management Co.,Ltd.	other	2.3M	¥1,082	+27.1%	¥236M ($1.5M)
2022-10-20	SELL	negotiated	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.	other	4.0M	¥1,082	+27.1%	¥250M ($1.6M)
2022-10-20	BUY	negotiated	三井住友信託銀行株式会社 Sumitomo Mitsui Trust Bank,Limited	strategic	5.6M	¥1,082	-27.1%	¥6.1B ($39.4M)
2022-10-03	BUY	negotiated	三菱UFJ国際投信株式会社 Mitsubishi UFJ Financial Group Inc.	passive	1.1M	¥1,050	-24.9%	¥135M ($871K)
2022-10-03	SELL	negotiated	三菱UFJ信託銀行株式会社 Mitsubishi UFJ Financial Group Inc.	passive	2.8M	¥1,050	+24.9%	¥823M ($5.3M)
2022-10-03	SELL	negotiated	株式会社三菱UFJ銀行 Mitsubishi UFJ Financial Group Inc.	strategic	1.5M	¥1,050	+24.9%	¥675M ($4.4M)
2022-02-04	SELL	negotiated	日興アセットマネジメント株式会社 Nikko Asset Management Co.,Ltd.	other	2.5M	¥1,048	+24.7%	¥202M ($1.3M)
2022-02-04	SELL	negotiated	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.	other	4.2M	¥1,048	+24.7%	¥94M ($608K)
2022-02-04	BUY	negotiated	三井住友信託銀行株式会社 Sumitomo Mitsui Trust Bank,Limited	strategic	5.6M	¥1,048	-24.7%	¥5.9B ($38.2M)
2021-04-21	BUY	unknown	日興アセットマネジメント株式会社 Nikko Asset Management Co.,Ltd.	other	2.7M	¥1,358	-41.9%	¥52M ($338K)

Showing the 50 most recent of 52 filings.

Frequently asked questions

Who has been buying Keio Corporation stock?: 18 distinct investors have filed 12 disclosed large-shareholding filings in Keio Corporation (9008), most recently on 2025-09-19. 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 Keio Corporation have?: Keio Corporation has 12 buy-side and 21 sell-side disclosures on record, covering ¥768M ($5.0M) in total reported value, spanning 2021-04-21 to 2025-09-19.
Where does StockDrifts get Keio Corporation 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 Keio Corporation. For how StockDrifts scores these disclosures, see the Japan insider signal tier research, or browse every Japanese stock we track.