Who has been buying Fujikura Kasei Co., Ltd. stock?

11 distinct investors have filed 45 disclosed large-shareholding filings in Fujikura Kasei Co., Ltd. (4620), most recently on 2026-05-12. 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 Fujikura Kasei Co., Ltd. have?

Fujikura Kasei Co., Ltd. has 45 buy-side and 22 sell-side disclosures on record, covering ¥7.4B ($47.9M) in total reported value, spanning 2022-06-21 to 2026-05-12.

Where does StockDrifts get Fujikura Kasei 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.

Fujikura Kasei Co., Ltd. 4620

Company

藤倉化成株式会社Fujikura Kasei Co., Ltd.

Investors

Buys

Total Value

¥7.4B ($47.9M)

Avg Return

+101.24%

Last Filing

2026-05-12

Fujikura Kasei Co., Ltd. (4620) has 45 disclosed large-shareholding filings and 22 disclosed disposals on record, filed by 11 distinct investors. Together those filings cover ¥7.4B ($47.9M) in reported transaction value. The earliest filing StockDrifts holds for Fujikura Kasei Co., Ltd. is dated 2022-06-21; the most recent is 2026-05-12. 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 +101.24%, 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
2026-06-18	BUY	unknown	株式会社UESHIMA	activist	2.5K	¥1,138	-16.6%	¥3M ($18K)
2026-06-18	BUY	Market Buy	株式会社ドリームキャリアホールディングス	activist	385.3K	¥1,138	-16.6%	¥7M ($45K)
2026-06-18	BUY	unknown	株式会社ナチュラリ	activist	938.9K	¥1,138	-16.6%	¥1.1B ($6.9M)
2026-06-18	BUY	unknown	植島幹九郎	activist	688.5K	¥1,138	-16.6%	¥784M ($5.1M)
2026-06-18	BUY	unknown	株式会社DOE5パーセント	activist	1.2M	¥1,138	-16.6%	¥1.3B ($8.6M)
2026-06-17	BUY	Market Buy	株式会社UESHIMA	activist	2.5K	¥1,118	-15.1%	¥3M ($22K)
2026-06-17	BUY	Market Buy	株式会社ドリームキャリアホールディングス	activist	380.9K	¥1,118	-15.1%	¥355M ($2.3M)
2026-06-17	SELL	unknown	株式会社ナチュラリ	activist	938.9K	¥1,118	+15.1%	¥286M ($1.8M)
2026-06-17	BUY	unknown	植島幹九郎	activist	688.5K	¥1,118	-15.1%	¥770M ($5.0M)
2026-06-17	BUY	unknown	株式会社DOE5パーセント	activist	1.2M	¥1,118	-15.1%	¥1.3B ($8.5M)
2026-05-26	BUY	unknown	株式会社ドリームキャリアホールディングス	activist	61.7K	¥1,021	+12.3%	¥63M ($406K)
2026-05-26	BUY	Market Buy	株式会社ナチュラリ	activist	1.2M	¥1,021	+12.3%	¥135M ($874K)
2026-05-26	SELL	unknown	植島幹九郎	activist	688.5K	¥1,021	-12.3%	¥954M ($6.2M)
2026-05-26	BUY	Market Buy	株式会社DOE5パーセント	activist	1.2M	¥1,021	+12.3%	¥964M ($6.2M)
2026-05-12	BUY	unknown	株式会社ドリームキャリアホールディングス	activist	61.7K	¥1,174	-8.9%	¥72M ($467K)
2026-05-12	BUY	Market Buy	株式会社ナチュラリ	activist	1.1M	¥1,174	-8.9%	¥355M ($2.3M)
2026-05-12	BUY	Market Buy	植島幹九郎	activist	1.6M	¥1,174	-8.9%	¥18M ($117K)
2026-05-12	BUY	unknown	株式会社DOE5パーセント	activist	229.5K	¥1,174	-8.9%	¥269M ($1.7M)
2026-04-17	BUY	unknown	株式会社ドリームキャリアホールディングス	activist	61.7K	¥1,244	-14.2%	¥77M ($495K)
2026-04-17	BUY	unknown	株式会社ナチュラリ	activist	760.4K	¥1,244	-14.2%	¥384M ($2.5M)
2026-04-17	BUY	unknown	植島幹九郎	activist	1.6M	¥1,244	-14.2%	¥2.0B ($12.9M)
2026-04-17	BUY	unknown	株式会社DOE5パーセント	activist	229.5K	¥1,244	-14.2%	¥42M ($272K)
2026-04-08	BUY	Market Buy	株式会社ナチュラリ	activist	451.7K	¥1,189	+0.7%	¥176M ($1.1M)
2026-04-08	BUY	Market Buy	株式会社ドリームキャリアホールディングス	activist	61.7K	¥1,189	+0.7%	¥4M ($24K)
2026-04-08	BUY	Market Buy	植島幹九郎	activist	1.6M	¥1,189	+0.7%	¥242M ($1.6M)
2026-04-08	BUY	Market Buy	株式会社DOE5パーセント	activist	194.5K	¥1,189	+0.7%	¥26M ($166K)
2026-04-02	BUY	Market Buy	株式会社DOE5パーセント	activist	171.7K	¥1,194	+3.2%	¥206M ($1.3M)
2026-04-02	BUY	Market Buy	株式会社ドリームキャリアホールディングス	activist	57.8K	¥1,194	+3.2%	¥70M ($452K)
2026-04-02	BUY	Market Buy	植島幹九郎	activist	1.4M	¥1,194	+3.2%	¥88M ($570K)
2026-04-02	BUY	Market Buy	株式会社ナチュラリ	activist	303.3K	¥1,194	+3.2%	¥107M ($689K)
2026-03-13	BUY	unknown	株式会社ナチュラリ	activist	213.9K	¥1,115	+8.4%	¥259M ($1.7M)
2026-03-13	BUY	unknown	植島幹九郎	activist	1.3M	¥1,115	+8.4%	¥1.6B ($10.4M)
2025-09-19	SELL	negotiated	三井住友信託銀行株式会社 Sumitomo Mitsui Trust Bank,Limited	strategic	286.0K	¥628	-92.5%	¥401M ($2.6M)
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	453.4K	¥628	-92.5%	¥12M ($75K)
2025-09-19	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	631.3K	¥628	-92.5%	¥4M ($25K)
2025-08-21	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	470.7K	¥610	+98.2%	¥15M ($97K)
2025-08-21	SELL	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	638.3K	¥610	-98.2%	¥2M ($12K)
2025-08-21	BUY	Market Buy	三井住友信託銀行株式会社 Sumitomo Mitsui Trust Bank,Limited	strategic	926.0K	¥610	+98.2%	¥256M ($1.7M)
2025-07-22	BUY	negotiated	日興アセットマネジメント株式会社 Nikko Asset Management Co.,Ltd.	other	447.9K	¥551	+119.4%	¥247M ($1.6M)
2025-07-22	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	640.6K	¥551	+119.4%	¥353M ($2.3M)
2025-07-22	BUY	negotiated	三井住友信託銀行株式会社 Sumitomo Mitsui Trust Bank,Limited	strategic	506.0K	¥551	+119.4%	¥279M ($1.8M)
2024-08-21	SELL	negotiated	三井住友信託銀行株式会社 Sumitomo Mitsui Trust Bank,Limited	strategic	286.0K	¥516	-134.3%	¥103M ($668K)
2024-08-21	SELL	negotiated	日興アセットマネジメント株式会社 Nikko Asset Management Co.,Ltd.	other	463.4K	¥516	-134.3%	¥30M ($195K)
2024-08-21	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	593.4K	¥516	+134.3%	¥2M ($10K)
2024-07-19	BUY	unknown	ノムラインターナショナルピーエルシー NOMURA INTERNATIONAL PLC	other	10.9K	¥544	+122.2%	¥649M ($4.2M)
2024-07-19	BUY	negotiated	日興アセットマネジメント株式会社 Nikko Asset Management Co.,Ltd.	other	520.0K	¥544	+122.2%	¥283M ($1.8M)
2024-07-19	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	588.3K	¥544	+122.2%	¥320M ($2.1M)
2024-07-19	BUY	negotiated	三井住友信託銀行株式会社 Sumitomo Mitsui Trust Bank,Limited	strategic	486.0K	¥544	+122.2%	¥264M ($1.7M)
2024-07-19	BUY	unknown	野村證券株式会社 Nomura Securities Co.,Ltd.	other	53.2K	¥544	+122.2%	¥29M ($187K)
2024-07-19	BUY	unknown	野村アセットマネジメント株式会社 Nomura Asset Management Co., Ltd.	other	1.4M	¥544	+122.2%	¥777M ($5.0M)

Showing the 50 most recent of 90 filings.

Frequently asked questions

Who has been buying Fujikura Kasei Co., Ltd. stock?: 11 distinct investors have filed 45 disclosed large-shareholding filings in Fujikura Kasei Co., Ltd. (4620), most recently on 2026-05-12. 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 Fujikura Kasei Co., Ltd. have?: Fujikura Kasei Co., Ltd. has 45 buy-side and 22 sell-side disclosures on record, covering ¥7.4B ($47.9M) in total reported value, spanning 2022-06-21 to 2026-05-12.
Where does StockDrifts get Fujikura Kasei 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 Fujikura Kasei Co., Ltd.. For how StockDrifts scores these disclosures, see the Japan insider signal tier research, or browse every Japanese stock we track.