Who has been buying Eiken Chemical Co., Ltd. stock?

14 distinct investors have filed 71 disclosed large-shareholding filings in Eiken Chemical Co., Ltd. (4549), most recently on 2026-04-08. 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 Eiken Chemical Co., Ltd. have?

Eiken Chemical Co., Ltd. has 71 buy-side and 10 sell-side disclosures on record, covering ¥34.3B ($221.0M) in total reported value, spanning 2021-03-19 to 2026-04-08.

Where does StockDrifts get Eiken Chemical 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.

Eiken Chemical Co., Ltd. 4549

Company

栄研化学株式会社Eiken Chemical Co., Ltd.

Investors

Buys

Total Value

¥34.3B ($221.0M)

Avg Return

+50.48%

Last Filing

2026-04-08

Eiken Chemical Co., Ltd. (4549) has 71 disclosed large-shareholding filings and 10 disclosed disposals on record, filed by 14 distinct investors. Together those filings cover ¥34.3B ($221.0M) in reported transaction value. The earliest filing StockDrifts holds for Eiken Chemical Co., Ltd. is dated 2021-03-19; the most recent is 2026-04-08. 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 +50.48%, 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
2026-07-24	SELL	negotiated	ダルトン・インベストメンツ・インク Dalton Investments, Inc.	activist	6.2M	¥2,580	+11.4%	¥1.6B ($10.5M)
2026-07-24	BUY	unknown	エヌエーブイエフ・セレクト・マスター・ファンド・エルピーFund LP) NAVF Select (Master	activist	1.3M	¥2,580	-11.4%	¥3.2B ($20.8M)
2026-07-24	BUY	unknown	ニッポン・アクティブ・バリュー・ファンド NIPPON ACTIVE VALUE FUND PLC	activist	3.3M	¥2,580	-11.4%	¥8.4B ($54.4M)
2026-07-24	BUY	unknown	エヌエーブイエフ・セレクト・マスター・ファンド・エルピーFund LP) NAVF Select (Master	activist	1.3M	¥2,580	-11.4%	¥3.2B ($20.8M)
2026-07-24	BUY	unknown	ニッポン・アクティブ・バリュー・ファンド NIPPON ACTIVE VALUE FUND PLC	activist	3.3M	¥2,580	-11.4%	¥8.4B ($54.4M)
2026-07-24	SELL	negotiated	ダルトン・インベストメンツ・インク Dalton Investments, Inc.	activist	6.2M	¥2,580	+11.4%	¥1.6B ($10.5M)
2026-06-30	BUY	unknown	ニッポン・アクティブ・バリュー・ファンド NIPPON ACTIVE VALUE FUND PLC	activist	3.3M	¥2,546	-0.6%	¥8.3B ($53.7M)
2026-06-30	BUY	negotiated	ダルトン・インベストメンツ・インク Dalton Investments, Inc.	activist	6.8M	¥2,546	-0.6%	¥17.4B ($112.1M)
2026-06-30	BUY	unknown	エヌエーブイエフ・セレクト・マスター・ファンド・エルピーFund LP) NAVF Select (Master	activist	1.3M	¥2,546	-0.6%	¥3.2B ($20.5M)
2026-06-19	BUY	unknown	ニッポン・アクティブ・バリュー・ファンド NIPPON ACTIVE VALUE FUND PLC	activist	3.3M	¥2,634	-3.4%	¥8.6B ($55.6M)
2026-06-19	BUY	negotiated	ダルトン・インベストメンツ・インク Dalton Investments, Inc.	activist	6.8M	¥2,634	-3.4%	¥18.0B ($116.0M)
2026-06-19	BUY	unknown	エヌエーブイエフ・セレクト・マスター・ファンド・エルピーFund LP) NAVF Select (Master	activist	1.3M	¥2,634	-3.4%	¥3.3B ($21.2M)
2026-04-08	BUY	unknown	ダルトン・インベストメンツ・インク(Dalton Investments	activist	6.8M	¥3,380	-9.6%	¥23.1B ($148.8M)
2026-04-08	BUY	unknown	エヌエーブイエフ・セレクト・マスター・ファンド・エルピーFund LP) NAVF Select (Master	activist	1.3M	¥3,380	-9.6%	¥58M ($377K)
2026-04-08	BUY	unknown	ニッポン・アクティブ・バリュー・ファンド NIPPON ACTIVE VALUE FUND PLC	activist	3.3M	¥3,380	-9.6%	¥11.1B ($71.3M)
2025-12-03	BUY	Market Buy	アセット・バリュー・インベスターズ・リミテッド (Asset Value Investors Limited) Asset Value Investors Limited	activist	2.7M	¥2,450	+28.8%	¥1.5B ($9.7M)
2025-12-03	BUY	Market Buy	アセット・バリュー・インベスターズ・リミテッド (Asset Value Investors Limited) Asset Value Investors Limited	activist	2.5M	¥2,450	+28.8%	¥1.2B ($7.4M)
2025-11-21	BUY	Market Buy	ダルトン・インベストメンツ・インク(Dalton Investments Dalton Investments, Inc.	activist	6.8M	¥2,343	+34.7%	¥1.7B ($10.7M)
2025-11-21	BUY	Market Buy	エヌエーブイエフ・セレクト・エルエルシー NAVF Select LLC	activist	1.2M	¥2,343	+34.7%	¥680M ($4.4M)
2025-11-21	BUY	Market Buy	ニッポン・アクティブ・バリュー・ファンド NIPPON ACTIVE VALUE FUND PLC	activist	3.3M	¥2,343	+34.7%	¥793M ($5.1M)
2025-11-13	BUY	Market Buy	ダルトン・インベストメンツ・インク(Dalton Investments Dalton Investments, Inc.	activist	6.8M	¥2,340	+34.8%	¥487M ($3.1M)
2025-11-13	BUY	Market Buy	エヌエーブイエフ・セレクト・エルエルシー NAVF Select LLC	activist	1.1M	¥2,340	+34.8%	¥415M ($2.7M)
2025-11-13	BUY	Market Buy	ニッポン・アクティブ・バリュー・ファンド NIPPON ACTIVE VALUE FUND PLC	activist	3.3M	¥2,340	+34.8%	¥72M ($465K)
2025-09-19	SELL	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	877.9K	¥2,453	-28.6%	¥378M ($2.4M)
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	824.4K	¥2,453	-28.6%	¥397M ($2.6M)
2025-09-16	BUY	Market Buy	アセット・バリュー・インベスターズ・リミテッド (Asset Value Investors Limited) Asset Value Investors Limited	activist	2.3M	¥2,434	+29.6%	¥938M ($6.1M)
2025-07-17	BUY	Market Buy	ニッポン・アクティブ・バリュー・ファンド NIPPON ACTIVE VALUE FUND PLC	activist	3.2M	¥2,100	+50.2%	¥16M ($104K)
2025-07-17	BUY	Market Buy	ダルトン・インベストメンツ・インク(Dalton Investments Dalton Investments, Inc.	activist	6.6M	¥2,100	+50.2%	¥817M ($5.3M)
2025-07-17	BUY	Market Buy	エヌエーブイエフ・セレクト・エルエルシー NAVF Select LLC	activist	876.5K	¥2,100	+50.2%	¥16M ($104K)
2025-06-30	SELL	Market Buy	三菱UFJ信託銀行株式会社 Mitsubishi UFJ Financial Group Inc.	passive	1.1M	¥2,131	-48.0%	¥1.1B ($6.8M)
2025-06-30	SELL	Market Buy	三菱UFJアセットマネジメント株式会社 Mitsubishi UFJ Financial Group Inc.	passive	295.0K	¥2,131	-48.0%	¥25M ($159K)
2025-06-03	BUY	Market Buy	ダルトン・インベストメンツ・インク(Dalton Investments Dalton Investments, Inc.	activist	6.2M	¥1,986	+58.9%	¥666M ($4.3M)
2025-06-03	BUY	Market Buy	エヌエーブイエフ・セレクト・エルエルシー NAVF Select LLC	activist	865.9K	¥1,986	+58.9%	¥46M ($296K)
2025-06-03	BUY	Market Buy	ニッポン・アクティブ・バリュー・ファンド NIPPON ACTIVE VALUE FUND PLC	activist	3.2M	¥1,986	+58.9%	¥61M ($395K)
2025-03-03	BUY	Market Buy	ダルトン・インベストメンツ・インク(Dalton Investments Dalton Investments, Inc.	activist	5.9M	¥2,197	+43.6%	¥906M ($5.8M)
2025-03-03	BUY	Market Buy	エヌエーブイエフ・セレクト・エルエルシー NAVF Select LLC	activist	842.9K	¥2,197	+43.6%	¥8M ($55K)
2025-03-03	BUY	Market Buy	ニッポン・アクティブ・バリュー・ファンド NIPPON ACTIVE VALUE FUND PLC	activist	3.2M	¥2,197	+43.6%	¥7.0B ($45.4M)
2025-02-10	BUY	Market Buy	ダルトン・インベストメンツ・インク(Dalton Investments Dalton Investments, Inc.	activist	5.5M	¥2,145	+47.1%	¥843M ($5.4M)
2025-02-10	BUY	Market Buy	エヌエーブイエフ・セレクト・エルエルシー NAVF Select LLC	activist	839.8K	¥2,145	+47.1%	¥8M ($53K)
2025-02-10	BUY	Market Buy	ニッポン・アクティブ・バリュー・ファンド NIPPON ACTIVE VALUE FUND PLC	activist	3.2M	¥2,145	+47.1%	¥6.9B ($44.3M)
2025-01-10	BUY	Market Buy	ニッポン・アクティブ・バリュー・ファンド NIPPON ACTIVE VALUE FUND PLC	activist	3.2M	¥2,153	+46.5%	¥6.9B ($44.4M)
2025-01-10	BUY	Market Buy	ダルトン・インベストメンツ・インク(Dalton Investments Dalton Investments, Inc.	activist	5.1M	¥2,153	+46.5%	¥75M ($482K)
2025-01-10	BUY	Market Buy	エヌエーブイエフ・セレクト・エルエルシー NAVF Select LLC	activist	836.3K	¥2,153	+46.5%	¥1.8B ($11.6M)
2024-12-20	BUY	Market Buy	ダルトン・インベストメンツ・インク(Dalton Investments Dalton Investments, Inc.	activist	5.0M	¥2,150	+46.7%	¥854M ($5.5M)
2024-12-20	BUY	Market Buy	エヌエーブイエフ・セレクト・エルエルシー NAVF Select LLC	activist	836.1K	¥2,150	+46.7%	¥75M ($481K)
2024-12-20	BUY	Market Buy	ニッポン・アクティブ・バリュー・ファンド NIPPON ACTIVE VALUE FUND PLC	activist	3.2M	¥2,150	+46.7%	¥6.9B ($44.4M)
2024-11-28	BUY	Market Buy	ダルトン・インベストメンツ・インク(Dalton Investments Dalton Investments, Inc.	activist	4.7M	¥2,159	+46.1%	¥10.0B ($64.8M)
2024-11-28	BUY	Market Buy	エヌエーブイエフ・セレクト・エルエルシー NAVF Select LLC	activist	800.0K	¥2,159	+46.1%	¥649M ($4.2M)
2024-11-28	BUY	Market Buy	ニッポン・アクティブ・バリュー・ファンド NIPPON ACTIVE VALUE FUND PLC	activist	3.2M	¥2,159	+46.1%	¥433M ($2.8M)
2024-11-14	BUY	Market Buy	ダルトン・インベストメンツ・インク(Dalton Investments Dalton Investments, Inc.	activist	4.7M	¥2,169	+45.5%	¥1.0B ($6.6M)

Showing the 50 most recent of 117 filings.

Frequently asked questions

Who has been buying Eiken Chemical Co., Ltd. stock?: 14 distinct investors have filed 71 disclosed large-shareholding filings in Eiken Chemical Co., Ltd. (4549), most recently on 2026-04-08. 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 Eiken Chemical Co., Ltd. have?: Eiken Chemical Co., Ltd. has 71 buy-side and 10 sell-side disclosures on record, covering ¥34.3B ($221.0M) in total reported value, spanning 2021-03-19 to 2026-04-08.
Where does StockDrifts get Eiken Chemical 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 Eiken Chemical Co., Ltd.. For how StockDrifts scores these disclosures, see the Japan insider signal tier research, or browse every Japanese stock we track.