Who has been buying The Yokohama Rubber Co., Ltd. stock?

15 distinct investors have filed 81 disclosed large-shareholding filings in The Yokohama Rubber Co., Ltd. (5101), most recently on 2026-03-30. 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 Yokohama Rubber Co., Ltd. have?

The Yokohama Rubber Co., Ltd. has 81 buy-side and 41 sell-side disclosures on record, covering ¥382.3B ($2.5B) in total reported value, spanning 2021-03-19 to 2026-03-30.

Where does StockDrifts get The Yokohama Rubber Co., 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.

The Yokohama Rubber Co., Ltd. 5101

Company

横浜ゴム株式会社The Yokohama Rubber Co., Ltd.

Investors

Buys

Total Value

¥382.3B ($2.5B)

Avg Return

+139.74%

Last Filing

2026-03-30

The Yokohama Rubber Co., Ltd. (5101) has 81 disclosed large-shareholding filings and 41 disclosed disposals on record, filed by 15 distinct investors. Together those filings cover ¥382.3B ($2.5B) in reported transaction value. The earliest filing StockDrifts holds for The Yokohama Rubber Co., Ltd. is dated 2021-03-19; the most recent is 2026-03-30. 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 +139.74%, 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
2026-08-07	BUY	unknown	SMBC日興証券株式会社	other	505.7K	¥7,792	+0.7%	¥3.9B ($25.4M)
2026-08-07	BUY	Market Buy	三井住友DSアセットマネジメント株式会社	passive	7.8M	¥7,792	+0.7%	¥61.0B ($393.8M)
2026-07-23	BUY	Market Buy	三井住友DSアセットマネジメント株式会社	passive	7.8M	¥7,776	+0.9%	¥6.0B ($38.4M)
2026-07-23	SELL	unknown	SMBC日興証券株式会社	other	266.2K	¥7,776	-0.9%	¥16.3B ($105.2M)
2026-07-06	SELL	unknown	アモーヴァ・アセットマネジメント株式会社	other	6.6M	¥7,919	+4.7%	¥395M ($2.6M)
2026-07-06	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	other	3.0M	¥7,919	-4.7%	¥527M ($3.4M)
2026-07-01	BUY	Market Buy	ノムラインターナショナルピーエルシー NOMURA INTERNATIONAL PLC	other	700.8K	¥7,383	+3.9%	¥3.2B ($20.6M)
2026-07-01	BUY	block_purchase	野村アセットマネジメント株式会社	other	17.5M	¥7,383	+3.9%	¥9.0B ($57.9M)
2026-06-05	BUY	unknown	SMBC日興証券株式会社	other	2.4M	¥7,028	+11.4%	¥16.6B ($106.8M)
2026-06-05	BUY	Market Buy	三井住友DSアセットマネジメント株式会社	passive	7.0M	¥7,028	+11.4%	¥49.3B ($318.2M)
2026-06-04	BUY	Market Buy	アモーヴァ・アセットマネジメント株式会社	other	6.6M	¥6,913	+13.3%	¥230M ($1.5M)
2026-06-04	BUY	unknown	三井住友トラスト・アセットマネジメント株式会社	other	2.9M	¥6,913	+13.3%	¥20.2B ($130.1M)
2026-06-04	SELL	unknown	三井住友信託銀行株式会社	unknown	0	¥6,913	-13.3%	¥3.6B ($23.0M)
2026-03-30	SELL	unknown	野村アセットマネジメント株式会社	other	16.3M	¥5,898	-9.8%	¥7.3B ($46.9M)
2026-03-30	SELL	unknown	ノムラインターナショナルピーエルシー NOMURA INTERNATIONAL PLC	other	264.4K	¥5,898	-9.8%	¥1.6B ($10.1M)
2026-03-30	SELL	unknown	野村證券株式会社	other	5.4K	¥5,898	-9.8%	¥883M ($5.7M)
2025-10-17	SELL	unknown	野村アセットマネジメント株式会社 Nomura Asset Management Co., Ltd.	other	17.6M	¥5,335	-26.6%	¥2.8B ($18.3M)
2025-10-17	SELL	unknown	ノムラインターナショナルピーエルシー NOMURA INTERNATIONAL PLC	other	536.8K	¥5,335	-26.6%	¥89M ($573K)
2025-10-17	BUY	unknown	野村證券株式会社 Nomura Securities Co.,Ltd.	other	156.6K	¥5,335	+26.6%	¥836M ($5.4M)
2025-09-25	SELL	unknown	野村アセットマネジメント株式会社 Nomura Asset Management Co., Ltd.	other	18.1M	¥5,686	-18.8%	¥2.2B ($14.0M)
2025-09-25	BUY	unknown	ノムラインターナショナルピーエルシー NOMURA INTERNATIONAL PLC	other	545.7K	¥5,686	+18.8%	¥28.4B ($183.1M)
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	2.9M	¥5,715	+18.2%	¥1.2B ($8.0M)
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	6.6M	¥5,715	+18.2%	¥380M ($2.5M)
2025-09-19	SELL	Market Buy	三井住友信託銀行株式会社 Sumitomo Mitsui Trust Bank,Limited	strategic	508.5K	¥5,715	-18.2%	¥85.6B ($552.2M)
2025-09-12	BUY	Market Buy	アセットマネジメントOneインターナショナル Asset Management One International Ltd.	other	1.2M	¥5,921	+14.1%	¥3.1B ($19.7M)
2025-09-12	BUY	Market Buy	アセットマネジメントOne株式会社 Asset Management One Co., Ltd.	other	12.6M	¥5,921	+14.1%	¥9.9B ($63.6M)
2025-09-12	BUY	Market Buy	みずほ証券株式会社 Mizuho Securities Co., Ltd.	other	138.5K	¥5,921	+14.1%	¥72.1B ($465.3M)
2025-09-12	BUY	Market Buy	株式会社みずほ銀行 Mizuho Bank, Ltd.	strategic	7.9M	¥5,921	+14.1%	¥296M ($1.9M)
2025-09-05	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	18.5M	¥5,781	+16.8%	¥962M ($6.2M)
2025-09-05	BUY	Market Buy	ノムラインターナショナルピーエルシー NOMURA INTERNATIONAL PLC	other	504.4K	¥5,781	+16.8%	¥96.2B ($620.6M)
2025-07-28	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	18.3M	¥4,464	+51.3%	¥1.3B ($8.1M)
2025-07-28	BUY	Market Buy	ノムラインターナショナルピーエルシー NOMURA INTERNATIONAL PLC	other	339.4K	¥4,464	+51.3%	¥1.5B ($9.8M)
2025-04-28	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	18.4M	¥3,140	+115.1%	¥7.2B ($46.4M)
2025-04-28	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	340.6K	¥3,140	-115.1%	¥7.1B ($46.0M)
2025-04-28	BUY	Market Buy	野村證券株式会社 Nomura Securities Co.,Ltd.	other	69.2K	¥3,140	+115.1%	¥21.3B ($137.7M)
2025-04-16	SELL	Market Buy	野村證券株式会社 Nomura Securities Co.,Ltd.	other	-22.4K	¥2,863.5	-135.9%	¥49M ($313K)
2025-04-16	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	16.1M	¥2,863.5	+135.9%	¥874M ($5.6M)
2025-04-16	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	2.6M	¥2,863.5	-135.9%	¥583M ($3.8M)
2025-03-25	BUY	Market Buy	野村證券株式会社 Nomura Securities Co.,Ltd.	other	-875	¥3,606	+87.3%	-
2025-03-25	SELL	Market Buy	野村アセットマネジメント株式会社 Nomura Asset Management Co., Ltd.	other	15.8M	¥3,606	-87.3%	¥4.0B ($25.6M)
2025-03-25	BUY	Market Buy	ノムラインターナショナルピーエルシー NOMURA INTERNATIONAL PLC	other	2.8M	¥3,606	+87.3%	¥4.9B ($31.6M)
2025-03-18	BUY	unknown	野村アセットマネジメント株式会社 Nomura Asset Management Co., Ltd.	other	16.9M	¥3,550	+90.3%	¥59.2B ($382.1M)
2025-03-18	BUY	unknown	ノムラインターナショナルピーエルシー NOMURA INTERNATIONAL PLC	other	1.5M	¥3,550	+90.3%	¥4.4B ($28.3M)
2025-03-18	BUY	unknown	野村證券株式会社 Nomura Securities Co.,Ltd.	other	325	¥3,550	+90.3%	¥1M ($7K)
2025-03-06	BUY	Market Buy	日興アセットマネジメント株式会社 Nikko Asset Management Co.,Ltd.	other	6.7M	¥3,354	+101.4%	¥227M ($1.5M)
2025-03-06	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	2.7M	¥3,354	+101.4%	¥626M ($4.0M)
2025-03-06	BUY	Market Buy	三井住友信託銀行株式会社 Sumitomo Mitsui Trust Bank,Limited	strategic	678.0K	¥3,354	+101.4%	¥2.3B ($14.7M)
2025-01-29	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	18.5M	¥3,433	+96.7%	¥931M ($6.0M)
2025-01-29	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	224.1K	¥3,433	-96.7%	¥64.0B ($413.1M)
2025-01-21	BUY	Market Buy	日興アセットマネジメント株式会社 Nikko Asset Management Co.,Ltd.	other	6.6M	¥3,257	+107.4%	¥1.6B ($10.3M)

Showing the 50 most recent of 182 filings.

Frequently asked questions

Who has been buying The Yokohama Rubber Co., Ltd. stock?: 15 distinct investors have filed 81 disclosed large-shareholding filings in The Yokohama Rubber Co., Ltd. (5101), most recently on 2026-03-30. 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 Yokohama Rubber Co., Ltd. have?: The Yokohama Rubber Co., Ltd. has 81 buy-side and 41 sell-side disclosures on record, covering ¥382.3B ($2.5B) in total reported value, spanning 2021-03-19 to 2026-03-30.
Where does StockDrifts get The Yokohama Rubber Co., 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 Yokohama Rubber Co., Ltd.. For how StockDrifts scores these disclosures, see the Japan insider signal tier research, or browse every Japanese stock we track.