Who has been buying Sankyu Inc. stock?

15 distinct investors have filed 21 disclosed large-shareholding filings in Sankyu Inc. (9065), most recently on 2025-10-21. 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 Sankyu Inc. have?

Sankyu Inc. has 21 buy-side and 16 sell-side disclosures on record, covering ¥59.5B ($383.7M) in total reported value, spanning 2021-06-21 to 2025-10-21.

Where does StockDrifts get Sankyu Inc. 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.

Sankyu Inc. 9065

Company

山九株式会社Sankyu Inc.

Investors

Buys

Total Value

¥59.5B ($383.7M)

Avg Return

+73.61%

Last Filing

2025-10-21

Sankyu Inc. (9065) has 21 disclosed large-shareholding filings and 16 disclosed disposals on record, filed by 15 distinct investors. Together those filings cover ¥59.5B ($383.7M) in reported transaction value. The earliest filing StockDrifts holds for Sankyu Inc. is dated 2021-06-21; the most recent is 2025-10-21. 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 +73.61%, 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	アモーヴァ・アセットマネジメント株式会社	other	1.3M	¥8,831	-0.9%	¥3.0B ($19.3M)
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	1.9M	¥8,831	-0.9%	¥3.0B ($19.3M)
2026-07-06	BUY	Market Buy	三井住友信託銀行株式会社	strategic	208.6K	¥8,831	-0.9%	¥47M ($301K)
2025-10-21	SELL	unknown	野村アセットマネジメント株式会社 Nomura Asset Management Co., Ltd.	other	2.8M	¥7,799	-11.3%	¥4.4B ($28.5M)
2025-10-21	BUY	unknown	ノムラインターナショナルピーエルシー NOMURA INTERNATIONAL PLC	other	112.2K	¥7,799	+11.3%	¥875M ($5.6M)
2025-09-19	SELL	negotiated	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	994.8K	¥8,155	-6.5%	¥317M ($2.0M)
2025-09-19	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	1.6M	¥8,155	+6.5%	¥90M ($584K)
2025-09-19	BUY	negotiated	三井住友信託銀行株式会社 Sumitomo Mitsui Trust Bank,Limited	strategic	208.6K	¥8,155	+6.5%	¥18.1B ($116.7M)
2025-03-07	BUY	unknown	アセットマネジメントOne株式会社 Asset Management One Co., Ltd.	other	1.7M	¥5,916	+46.8%	¥10.2B ($66.1M)
2025-03-07	BUY	unknown	株式会社みずほ銀行 Mizuho Bank, Ltd.	strategic	1.2M	¥5,916	+46.8%	¥7.2B ($46.3M)
2023-09-25	BUY	unknown	野村アセットマネジメント株式会社 Nomura Asset Management Co., Ltd.	other	3.7M	¥5,273	+64.7%	¥3.5B ($22.7M)
2023-09-25	SELL	unknown	ノムラインターナショナルピーエルシー NOMURA INTERNATIONAL PLC	other	14.6K	¥5,273	-64.7%	¥9.8B ($63.0M)
2023-09-25	BUY	unknown	野村證券株式会社 Nomura Securities Co.,Ltd.	other	12.8K	¥5,273	+64.7%	¥6.1B ($39.3M)
2023-07-06	SELL	Market Buy	シュローダー・インベストメント・マネージメント・リミテッド Schroder Investment Management Limited	passive	46.4K	¥4,778	-81.7%	¥89M ($571K)
2023-07-06	BUY	Market Buy	シュローダー・インベストメント・マネジメント株式会社 Schroder Investment Management(Japan)Limited	passive	2.3M	¥4,778	+81.7%	¥10.7B ($69.1M)
2023-06-22	BUY	unknown	野村アセットマネジメント株式会社 Nomura Asset Management Co., Ltd.	other	3.0M	¥4,831	+79.7%	¥14.7B ($95.1M)
2023-06-22	BUY	unknown	ノムラインターナショナルピーエルシー NOMURA INTERNATIONAL PLC	other	33.2K	¥4,831	+79.7%	¥160M ($1.0M)
2023-06-22	BUY	unknown	野村證券株式会社 Nomura Securities Co.,Ltd.	other	77.5K	¥4,831	+79.7%	¥374M ($2.4M)
2023-06-06	BUY	Market Buy	シュローダー・インベストメント・マネージメント・リミテッド Schroder Investment Management Limited	passive	66.8K	¥4,874	+78.1%	¥326M ($2.1M)
2023-06-06	BUY	Market Buy	シュローダー・インベストメント・マネジメント株式会社 Schroder Investment Management(Japan)Limited	passive	3.2M	¥4,874	+78.1%	¥15.5B ($100.0M)
2023-04-20	SELL	Market Buy	シュローダー・インベストメント・マネージメント・リミテッド Schroder Investment Management Limited	passive	66.8K	¥4,745	-83.0%	¥5.0B ($32.0M)
2023-04-20	BUY	Market Buy	シュローダー・インベストメント・マネジメント株式会社 Schroder Investment Management(Japan)Limited	passive	4.5M	¥4,745	+83.0%	¥2.4B ($15.5M)
2023-04-03	BUY	negotiated	三菱UFJ国際投信株式会社 Mitsubishi UFJ Financial Group Inc.	passive	366.9K	¥4,950	+75.4%	¥183M ($1.2M)
2023-04-03	SELL	negotiated	三菱UFJ信託銀行株式会社 Mitsubishi UFJ Financial Group Inc.	passive	1.7M	¥4,950	-75.4%	¥2.3B ($14.6M)
2023-04-03	SELL	negotiated	株式会社三菱UFJ銀行 Mitsubishi UFJ Financial Group Inc.	strategic	517.4K	¥4,950	-75.4%	¥1.2B ($7.5M)
2023-01-06	BUY	Market Buy	シュローダー・インベストメント・マネージメント・リミテッド Schroder Investment Management Limited	passive	1.1M	¥4,565	+90.2%	¥113M ($728K)
2023-01-06	BUY	Market Buy	シュローダー・インベストメント・マネジメント株式会社 Schroder Investment Management(Japan)Limited	passive	3.9M	¥4,565	+90.2%	¥2.7B ($17.6M)
2022-04-06	BUY	Market Buy	シュローダー・インベストメント・マネージメント・リミテッド Schroder Investment Management Limited	passive	1.1M	¥3,885	+123.5%	¥1.4B ($9.1M)
2022-04-06	BUY	Market Buy	シュローダー・インベストメント・マネジメント株式会社 Schroder Investment Management(Japan)Limited	passive	3.3M	¥3,885	+123.5%	¥1.3B ($8.5M)
2022-03-07	SELL	unknown	みずほ信託銀行株式会社 Mizuho Trust & Banking Co., Ltd.	unknown	0	¥3,855	-125.2%	¥738M ($4.8M)
2022-03-07	SELL	unknown	株式会社みずほ銀行 Mizuho Bank, Ltd.	strategic	1.2M	¥3,855	-125.2%	¥1.4B ($9.1M)
2022-03-07	SELL	unknown	アセットマネジメントOne株式会社 Asset Management One Co., Ltd.	other	1.6M	¥3,855	-125.2%	¥262M ($1.7M)
2021-11-19	BUY	negotiated	日興アセットマネジメント株式会社 Nikko Asset Management Co.,Ltd.	other	1.2M	¥4,685	+85.3%	¥5.4B ($34.8M)
2021-11-19	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	1.8M	¥4,685	+85.3%	¥8.3B ($53.9M)
2021-11-19	BUY	negotiated	三井住友信託銀行株式会社 Sumitomo Mitsui Trust Bank,Limited	strategic	208.6K	¥4,685	+85.3%	¥977M ($6.3M)
2021-10-06	SELL	Market Buy	シュローダー・インベストメント・マネージメント・ノースアメリカ・リミテッド Schroder Investment Management North America Limited	passive	59.4K	¥5,120	-69.6%	¥100M ($646K)
2021-10-06	SELL	Market Buy	シュローダー・インベストメント・マネージメント・リミテッド Schroder Investment Management Limited	passive	766.1K	¥5,120	-69.6%	¥3.4B ($21.8M)
2021-10-06	BUY	Market Buy	シュローダー・インベストメント・マネジメント株式会社 Schroder Investment Management(Japan)Limited	passive	3.2M	¥5,120	+69.6%	¥100M ($646K)
2021-09-22	SELL	negotiated	日興アセットマネジメント株式会社 Nikko Asset Management Co.,Ltd.	other	1.1M	¥5,270	-64.7%	¥172M ($1.1M)
2021-09-22	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	1.8M	¥5,270	-64.7%	¥3.7B ($23.9M)
2021-09-22	BUY	negotiated	三井住友信託銀行株式会社 Sumitomo Mitsui Trust Bank,Limited	strategic	208.6K	¥5,270	+64.7%	¥1.1B ($7.1M)
2021-06-21	SELL	unknown	日興アセットマネジメント株式会社 Nikko Asset Management Co.,Ltd.	other	1.1M	¥4,650	-86.7%	¥2.9B ($18.6M)
2021-06-21	SELL	unknown	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	2.5M	¥4,650	-86.7%	¥273M ($1.8M)
2021-06-21	BUY	unknown	三井住友信託銀行株式会社 Sumitomo Mitsui Trust Bank,Limited	strategic	208.6K	¥4,650	+86.7%	¥970M ($6.3M)

Frequently asked questions

Who has been buying Sankyu Inc. stock?: 15 distinct investors have filed 21 disclosed large-shareholding filings in Sankyu Inc. (9065), most recently on 2025-10-21. 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 Sankyu Inc. have?: Sankyu Inc. has 21 buy-side and 16 sell-side disclosures on record, covering ¥59.5B ($383.7M) in total reported value, spanning 2021-06-21 to 2025-10-21.
Where does StockDrifts get Sankyu Inc. 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 Sankyu Inc.. For how StockDrifts scores these disclosures, see the Japan insider signal tier research, or browse every Japanese stock we track.