Who has been buying Sk Kaken Co.,Ltd. stock?

5 distinct investors have filed 2 disclosed large-shareholding filings in Sk Kaken Co.,Ltd. (4628), most recently on 2023-09-07. 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 Sk Kaken Co.,Ltd. have?

Sk Kaken Co.,Ltd. has 2 buy-side and 2 sell-side disclosures on record, covering ¥502M ($3.2M) in total reported value, spanning 2021-04-22 to 2023-09-07.

Where does StockDrifts get Sk Kaken 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.

Sk Kaken Co.,Ltd. 4628

Company

エスケー化研株式会社Sk Kaken Co.,Ltd.

Investors

Buys

Total Value

¥502M ($3.2M)

Avg Return

+36.69%

Last Filing

2023-09-07

Sk Kaken Co.,Ltd. (4628) has 2 disclosed large-shareholding filings and 2 disclosed disposals on record, filed by 5 distinct investors. Together those filings cover ¥502M ($3.2M) in reported transaction value. The earliest filing StockDrifts holds for Sk Kaken Co.,Ltd. is dated 2021-04-22; the most recent is 2023-09-07. 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 +36.69%, 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
2026-07-23	SELL	unknown	エフエムアールインベストメントマネジメントユーケーリミテッド (FMR Investment Management (UK) Limited) FMR Investment Management (UK) Limited	other	743.3K	¥8,910	-0.2%	¥922M ($5.9M)
2026-06-19	BUY	unknown	エフエムアールエルエルシー(FMR LLC) FMR LLC	other	238.3K	¥9,680	-8.0%	¥322M ($2.1M)
2026-06-19	BUY	unknown	フィデリティ・マネジメント・アンド・リサーチ・ジャパン株式会社	other	31.7K	¥9,680	-8.0%	¥307M ($2.0M)
2026-06-19	BUY	unknown	エフアイエーエムエルエルシー FIAM LLC	other	15.1K	¥9,680	-8.0%	¥146M ($941K)
2026-06-19	BUY	Market Buy	フィデリティマネジメントアンドリサーチカンパニーエルエルシー Fidelity Management & Research Company LLC	corporate	191.6K	¥9,680	-8.0%	¥191M ($1.2M)
2026-06-19	BUY	unknown	フィデリティマネジメントトラストカンパニー Fidelity Management Trust Company	other	8.3K	¥9,680	-8.0%	¥81M ($521K)
2026-06-19	BUY	unknown	エフアイエーエムエルエルシー FIAM LLC	other	15.1K	¥9,680	-8.0%	¥146M ($944K)
2026-06-19	BUY	Market Buy	フィデリティマネジメントアンドリサーチカンパニーエルエルシー Fidelity Management & Research Company LLC	corporate	212.8K	¥9,680	-8.0%	¥206M ($1.3M)
2026-06-19	SELL	unknown	フィデリティマネジメントトラストカンパニー Fidelity Management Trust Company	other	29.5K	¥9,680	+8.0%	¥121M ($783K)
2026-06-19	SELL	unknown	フィデリティマネジメントアンドリサーチカンパニーエルエルシー Fidelity Management & Research Company LLC	corporate	993.5K	¥9,680	+8.0%	¥683M ($4.4M)
2026-06-19	SELL	unknown	フィデリティマネジメントアンドリサーチカンパニーエルエルシー (Fidelity Management & Research Company LLC) Fidelity Management & Research Company LLC	corporate	845.7K	¥9,680	+8.0%	¥1.7B ($11.1M)
2023-09-07	SELL	unknown	エフエムアールエルエルシー(FMR LLC) FMR LLC	other	857.7K	¥7,070	-53.2%	¥1.2B ($7.6M)
2023-07-07	SELL	unknown	エフエムアールエルエルシー(FMR LLC) FMR LLC	other	1.0M	¥7,820	-38.5%	¥1.3B ($8.5M)
2022-11-15	BUY	unknown	藤井實 Minoru Fujii	other	94.0K	¥7,800	+38.9%	¥733M ($4.7M)
2022-11-15	BUY	unknown	フジサン株式会社 Fujisan Co., Ltd.	other	41.0K	¥7,800	+38.9%	¥320M ($2.1M)
2022-11-15	BUY	unknown	藤井敏子 Toshiko Fujii	other	2.5K	¥7,800	+38.9%	¥20M ($127K)
2022-11-15	BUY	unknown	四国興産有限会社 Shikoku Kosan Co., Ltd.	other	860.2K	¥7,800	+38.9%	¥235M ($1.5M)
2021-04-22	BUY	Market Buy	エフエムアールエルエルシー(FMR LLC) FMR LLC	other	238.3K	¥8,050	+34.5%	¥267M ($1.7M)

Frequently asked questions

Who has been buying Sk Kaken Co.,Ltd. stock?: 5 distinct investors have filed 2 disclosed large-shareholding filings in Sk Kaken Co.,Ltd. (4628), most recently on 2023-09-07. 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 Sk Kaken Co.,Ltd. have?: Sk Kaken Co.,Ltd. has 2 buy-side and 2 sell-side disclosures on record, covering ¥502M ($3.2M) in total reported value, spanning 2021-04-22 to 2023-09-07.
Where does StockDrifts get Sk Kaken 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 Sk Kaken Co.,Ltd.. For how StockDrifts scores these disclosures, see the Japan insider signal tier research, or browse every Japanese stock we track.