Who has been buying Sakai Chemical Industry Co., Ltd. stock?

17 distinct investors have filed 47 disclosed large-shareholding filings in Sakai Chemical Industry Co., Ltd. (4078), most recently on 2025-11-07. 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 Sakai Chemical Industry Co., Ltd. have?

Sakai Chemical Industry Co., Ltd. has 47 buy-side and 18 sell-side disclosures on record, covering ¥19.8B ($127.5M) in total reported value, spanning 2021-10-27 to 2025-11-07.

Where does StockDrifts get Sakai Chemical Industry 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.

Sakai Chemical Industry Co., Ltd. 4078

Company

堺化学工業株式会社Sakai Chemical Industry Co., Ltd.

Investors

Buys

Total Value

¥19.8B ($127.5M)

Avg Return

+58.98%

Last Filing

2025-11-07

Sakai Chemical Industry Co., Ltd. (4078) has 47 disclosed large-shareholding filings and 18 disclosed disposals on record, filed by 17 distinct investors. Together those filings cover ¥19.8B ($127.5M) in reported transaction value. The earliest filing StockDrifts holds for Sakai Chemical Industry Co., Ltd. is dated 2021-10-27; the most recent is 2025-11-07. 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 +58.98%, 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
2026-08-13	SELL	Market Buy	エスエイチ・インベストメント・インク(SH Investment, Inc) SH Investment, Inc	passive	1.5M	¥4,055	+1.4%	¥1.1B ($7.2M)
2026-08-06	SELL	Market Buy	三井住友DSアセットマネジメント株式会社 Sumitomo Mitsui DS Asset Management Company, Limited	passive	679.1K	¥4,190	+4.5%	¥837M ($5.4M)
2026-07-29	BUY	Market Buy	エスエイチ・インベストメント・インク(SH Investment, Inc) SH Investment, Inc	passive	1.8M	¥3,780	+5.8%	¥828M ($5.3M)
2026-07-29	SELL	Market Buy	エスエイチ・インベストメント・インク(SH Investment, Inc) SH Investment, Inc	passive	1.8M	¥3,780	-5.8%	¥828M ($5.3M)
2026-07-17	BUY	Market Buy	エスエイチ・インベストメント・インク(SH Investment, Inc) SH Investment, Inc	passive	2.1M	¥3,830	+4.4%	¥919M ($5.9M)
2026-07-17	SELL	Market Buy	エスエイチ・インベストメント・インク(SH Investment, Inc) SH Investment, Inc	passive	2.1M	¥3,830	-4.4%	¥919M ($5.9M)
2026-07-15	SELL	Market Buy	エスエイチ・インベストメント・インク(SH Investment, Inc) SH Investment, Inc	passive	2.3M	¥4,290	+8.2%	¥902M ($5.8M)
2026-07-15	BUY	Market Buy	エスエイチ・インベストメント・インク(SH Investment, Inc) SH Investment, Inc	passive	2.3M	¥4,290	-8.2%	¥902M ($5.8M)
2026-07-07	BUY	Market Buy	エスエイチ・インベストメント・インク(SH Investment, Inc) SH Investment, Inc	passive	2.5M	¥4,165	+5.3%	¥511M ($3.3M)
2026-07-07	BUY	Market Buy	エスエイチ・インベストメント・インク(SH Investment, Inc) SH Investment, Inc	passive	2.5M	¥4,165	+5.3%	¥511M ($3.3M)
2026-06-19	SELL	unknown	野村アセットマネジメント株式会社	other	574.4K	¥4,800	+20.2%	¥1.0B ($6.7M)
2026-06-19	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	144.1K	¥4,800	-20.2%	¥538M ($3.5M)
2026-06-19	BUY	unknown	野村證券株式会社	other	13.7K	¥4,800	-20.2%	¥66M ($424K)
2026-06-11	SELL	unknown	ゼナーアセットマネジメントエルエルピー(Zennor Asset Management LLP) Zennor Asset Management LLP	activist	794.5K	¥4,530	+10.5%	¥1.6B ($10.6M)
2026-06-10	SELL	unknown	ゼナーアセットマネジメントエルエルピー(Zennor Asset Management LLP) Zennor Asset Management LLP	activist	1.2M	¥4,540	+10.7%	¥1.5B ($9.6M)
2026-06-04	SELL	unknown	アモーヴァ・アセットマネジメント株式会社	other	231.5K	¥5,160	+12.5%	¥132M ($852K)
2026-06-04	SELL	unknown	三井住友トラスト・アセットマネジメント株式会社	other	475.7K	¥5,160	+12.5%	¥718M ($4.6M)
2026-05-21	BUY	Market Buy	ゼナーアセットマネジメントエルエルピー(Zennor Asset Management LLP) Zennor Asset Management LLP	activist	1.5M	¥3,365	+37.1%	¥571M ($3.7M)
2025-11-07	BUY	unknown	野村アセットマネジメント株式会社 Nomura Asset Management Co., Ltd.	other	841.5K	¥3,000	+23.8%	¥2.5B ($16.3M)
2025-11-07	BUY	unknown	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	274.4K	¥3,000	+23.8%	¥133M ($855K)
2025-11-07	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	652.2K	¥3,000	-23.8%	¥765M ($4.9M)
2025-11-07	BUY	unknown	ノムラインターナショナルピーエルシー NOMURA INTERNATIONAL PLC	other	34.3K	¥3,000	+23.8%	¥103M ($664K)
2025-09-19	BUY	unknown	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	229.2K	¥2,900	+28.1%	¥5M ($32K)
2025-09-19	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	907.5K	¥2,900	-28.1%	¥291M ($1.9M)
2025-09-19	BUY	Market Buy	三井住友DSアセットマネジメント株式会社 Sumitomo Mitsui DS Asset Management Company, Limited	passive	853.5K	¥2,900	+28.1%	¥2.5B ($16.0M)
2025-09-05	BUY	Market Buy	ゼナーアセットマネジメントエルエルピー(Zennor Asset Management LLP) Zennor Asset Management LLP	activist	1.4M	¥2,956	+25.7%	¥593M ($3.8M)
2025-08-21	SELL	unknown	野村アセットマネジメント株式会社 Nomura Asset Management Co., Ltd.	other	679.5K	¥2,918	-27.3%	¥30M ($192K)
2025-08-21	SELL	unknown	ノムラインターナショナルピーエルシー NOMURA INTERNATIONAL PLC	other	-3.7K	¥2,918	-27.3%	¥243M ($1.6M)
2025-08-21	SELL	unknown	野村證券株式会社 Nomura Securities Co.,Ltd.	other	148.3K	¥2,918	-27.3%	¥496M ($3.2M)
2025-04-21	BUY	unknown	野村アセットマネジメント株式会社 Nomura Asset Management Co., Ltd.	other	690.0K	¥2,420	+53.5%	¥1.7B ($10.8M)
2025-04-21	BUY	unknown	ノムラインターナショナルピーエルシー NOMURA INTERNATIONAL PLC	other	79.9K	¥2,420	+53.5%	¥193M ($1.2M)
2025-04-21	BUY	unknown	野村證券株式会社 Nomura Securities Co.,Ltd.	other	150.0K	¥2,420	+53.5%	¥363M ($2.3M)
2025-02-07	BUY	Market Buy	シンプレクス・アセット・マネジメント株式会社 Simplex Asset Mannagement Co., Ltd	passive	850.0K	¥2,628	+41.4%	¥447M ($2.9M)
2025-02-07	SELL	Market Buy	シンプレクス・アセット・マネジメント株式会社 Simplex Asset Management Co., Ltd.	passive	850.0K	¥2,628	-41.4%	¥447M ($2.9M)
2025-01-10	SELL	Market Buy	シンプレクス・アセット・マネジメント株式会社 Simplex Asset Management Co., Ltd.	passive	1.0M	¥2,523	-47.3%	¥493M ($3.2M)
2024-12-12	SELL	Market Buy	シンプレクス・アセット・マネジメント株式会社 Simplex Asset Management Co., Ltd.	passive	1.2M	¥2,598	-43.0%	¥1.5B ($9.5M)
2024-12-12	BUY	unknown	ゼナーアセットマネジメントエルエルピー(Zennor Asset Management LLP) Zennor Asset Management LLP	activist	1.2M	¥2,598	+43.0%	¥3.1B ($20.1M)
2024-10-22	BUY	unknown	アセットマネジメントOne株式会社 Asset Management One Co., Ltd.	other	603.0K	¥2,634	+41.0%	¥1.6B ($10.1M)
2024-10-22	BUY	unknown	みずほ証券株式会社 Mizuho Securities Co., Ltd.	other	48.9K	¥2,634	+41.0%	¥896M ($5.8M)
2024-09-30	SELL	negotiated	三菱UFJモルガン・スタンレー証券株式会社 Mitsubishi UFJ Morgan Stanley Securities Co., Ltd.	other	10.7K	¥2,561	-45.1%	¥340M ($2.2M)
2024-09-30	SELL	negotiated	三菱UFJアセットマネジメント株式会社 Mitsubishi UFJ Financial Group Inc.	passive	95.9K	¥2,561	-45.1%	¥161M ($1.0M)
2024-09-30	BUY	negotiated	三菱UFJ信託銀行株式会社 Mitsubishi UFJ Financial Group Inc.	passive	513.9K	¥2,561	+45.1%	¥35M ($225K)
2024-09-30	BUY	negotiated	株式会社三菱UFJ銀行 Mitsubishi UFJ Financial Group Inc.	strategic	211.5K	¥2,561	+45.1%	¥542M ($3.5M)
2024-08-22	BUY	Market Buy	アセットマネジメントOne株式会社 Asset Management One Co., Ltd.	other	816.4K	¥2,673	+39.0%	¥2.2B ($13.9M)
2024-08-22	BUY	Market Buy	みずほ証券株式会社 Mizuho Securities Co., Ltd.	other	46.1K	¥2,673	+39.0%	¥64M ($410K)
2024-07-29	BUY	negotiated	三菱UFJモルガン・スタンレー証券株式会社 Mitsubishi UFJ Morgan Stanley Securities Co., Ltd.	other	143.0K	¥2,782	+33.5%	¥147M ($946K)
2024-07-29	BUY	negotiated	三菱UFJアセットマネジメント株式会社 Mitsubishi UFJ Financial Group Inc.	passive	157.7K	¥2,782	+33.5%	¥132M ($854K)
2024-07-29	BUY	negotiated	三菱UFJ信託銀行株式会社 Mitsubishi UFJ Financial Group Inc.	passive	500.1K	¥2,782	+33.5%	¥52M ($336K)
2024-07-29	BUY	negotiated	株式会社三菱UFJ銀行 Mitsubishi UFJ Financial Group Inc.	strategic	211.5K	¥2,782	+33.5%	¥588M ($3.8M)
2024-07-01	BUY	negotiated	三菱UFJモルガン・スタンレー証券株式会社 Mitsubishi UFJ Morgan Stanley Securities Co., Ltd.	other	89.4K	¥2,998	+23.9%	¥268M ($1.7M)

Showing the 50 most recent of 88 filings.

Frequently asked questions

Who has been buying Sakai Chemical Industry Co., Ltd. stock?: 17 distinct investors have filed 47 disclosed large-shareholding filings in Sakai Chemical Industry Co., Ltd. (4078), most recently on 2025-11-07. 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 Sakai Chemical Industry Co., Ltd. have?: Sakai Chemical Industry Co., Ltd. has 47 buy-side and 18 sell-side disclosures on record, covering ¥19.8B ($127.5M) in total reported value, spanning 2021-10-27 to 2025-11-07.
Where does StockDrifts get Sakai Chemical Industry 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 Sakai Chemical Industry Co., Ltd.. For how StockDrifts scores these disclosures, see the Japan insider signal tier research, or browse every Japanese stock we track.