Who has been buying SERAKU Co., Ltd. stock?

6 distinct investors have filed 5 disclosed large-shareholding filings in SERAKU Co., Ltd. (6199), most recently on 2026-04-07. 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 SERAKU Co., Ltd. have?

SERAKU Co., Ltd. has 5 buy-side and 17 sell-side disclosures on record, covering ¥1.1B ($7.0M) in total reported value, spanning 2021-12-27 to 2026-04-07.

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.

SERAKU Co., Ltd. 6199

Company

株式会社セラクSERAKU Co., Ltd.

Investors

Buys

Total Value

¥1.1B ($7.0M)

Avg Return

-10.67%

Last Filing

2026-04-07

SERAKU Co., Ltd. (6199) has 5 disclosed large-shareholding filings and 17 disclosed disposals on record, filed by 6 distinct investors. Together those filings cover ¥1.1B ($7.0M) in reported transaction value. The earliest filing StockDrifts holds for SERAKU Co., Ltd. is dated 2021-12-27; the most recent is 2026-04-07. Across these filings the average return since disclosure is -10.67%, 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
2026-06-23	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	298.9K	¥1,107	+32.2%	¥94M ($607K)
2026-06-23	BUY	Market Buy	エフアイエーエムエルエルシー FIAM LLC	other	604.5K	¥1,107	+32.2%	¥126M ($813K)
2026-06-09	BUY	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	213.5K	¥1,149	+27.3%	¥245M ($1.6M)
2026-06-09	BUY	unknown	エフアイエーエムエルエルシー FIAM LLC	other	490.3K	¥1,149	+27.3%	¥563M ($3.6M)
2026-05-22	BUY	Market Buy	エフエムアールエルエルシー(FMR LLC) FMR LLC	other	903.4K	¥1,223	+19.6%	¥245M ($1.6M)
2026-05-22	BUY	Market Buy	エフエムアールエルエルシー(FMR LLC) FMR LLC	other	903.4K	¥1,223	+19.6%	¥245M ($1.6M)
2026-04-07	BUY	unknown	エフエムアールエルエルシー(FMR LLC) FMR LLC	other	703.8K	¥1,498	-2.3%	¥1.1B ($6.8M)
2026-04-07	BUY	unknown	エフエムアールエルエルシー(FMR LLC) FMR LLC	other	703.8K	¥1,498	-2.3%	¥1.1B ($6.8M)
2025-05-16	BUY	unknown	株式会社宮崎 Miyazaki Co., Ltd.	activist	952.0K	¥1,540	-	-
2025-05-16	BUY	unknown	宮﨑仁美 Hitomi Miyazaki	strategic	192.0K	¥1,540	-	-
2025-05-16	BUY	unknown	宮﨑龍己 Miyazaki Tatsumi	activist	4.9M	¥1,540	-	-
2025-05-16	BUY	unknown	株式会社ミヤザキ Miyazaki Co., Ltd.	activist	714.0K	¥1,540	-	-
2025-01-27	SELL	unknown	宮﨑龍己 Miyazaki Tatsumi	activist	4.9M	¥1,617	+9.5%	¥1.0B ($6.7M)
2025-01-27	BUY	Market Buy	宮﨑仁美 Hitomi Miyazaki	strategic	192.0K	¥1,617	-9.5%	¥4M ($29K)
2025-01-27	SELL	Market Buy	宮﨑龍己 Miyazaki Tatsumi	activist	4.9M	¥1,617	+9.5%	¥1.0B ($6.7M)
2025-01-27	BUY	unknown	宮﨑仁美 Hitomi Miyazaki	strategic	192.0K	¥1,617	-9.5%	¥4M ($29K)
2025-01-27	BUY	unknown	株式会社宮崎 Miyazaki Co., Ltd.	activist	952.0K	¥1,617	-9.5%	¥18M ($115K)
2025-01-27	BUY	unknown	株式会社ミヤザキ Miyazaki Co., Ltd.	activist	714.0K	¥1,617	-	¥1.2B ($7.4M)
2025-01-27	BUY	Market Buy	株式会社宮崎 Miyazaki Co., Ltd.	activist	952.0K	¥1,617	-9.5%	¥18M ($115K)
2025-01-27	BUY	Market Buy	株式会社ミヤザキ Miyazaki Co., Ltd.	activist	714.0K	¥1,617	-	¥1.2B ($7.4M)
2024-08-23	SELL	unknown	宮﨑龍己 Miyazaki Tatsumi	activist	5.6M	¥1,362	-7.4%	¥210M ($1.4M)
2024-08-23	BUY	unknown	宮﨑仁美 Hitomi Miyazaki	strategic	192.0K	¥1,362	-	-
2024-08-23	SELL	unknown	株式会社宮崎 Miyazaki Co., Ltd.	activist	952.0K	¥1,362	-7.4%	¥2M ($12K)
2023-11-30	SELL	unknown	宮﨑仁美 Hitomi Miyazaki	strategic	192.0K	¥1,339	-9.3%	¥2M ($12K)
2023-11-30	SELL	unknown	株式会社宮崎 Miyazaki Co., Ltd.	activist	952.0K	¥1,339	-9.3%	¥17M ($108K)
2023-11-30	SELL	unknown	宮﨑仁美 Hitomi Miyazaki	strategic	192.0K	¥1,339	-9.3%	¥2M ($12K)
2023-11-30	SELL	unknown	株式会社宮崎 Miyazaki Co., Ltd.	activist	952.0K	¥1,339	-9.3%	¥2M ($12K)
2023-11-30	SELL	unknown	宮﨑仁美 Hitomi Miyazaki	strategic	192.0K	¥1,339	-9.3%	¥4M ($24K)
2023-11-30	SELL	unknown	株式会社宮崎 Miyazaki Co., Ltd.	activist	952.0K	¥1,339	-9.3%	¥21M ($133K)
2023-11-30	SELL	unknown	宮﨑龍己 Miyazaki Tatsumi	activist	5.8M	¥1,339	-9.3%	¥212M ($1.4M)
2023-11-30	SELL	unknown	宮﨑龍己 Miyazaki Tatsumi	activist	5.8M	¥1,339	-9.3%	¥212M ($1.4M)
2023-11-30	SELL	unknown	宮﨑龍己 Miyazaki Tatsumi	activist	5.9M	¥1,339	-9.3%	¥336M ($2.2M)
2023-11-30	SELL	unknown	宮﨑龍己 Miyazaki Tatsumi	activist	6.1M	¥1,339	-9.3%	¥17M ($107K)
2023-11-30	SELL	unknown	宮﨑仁美 Hitomi Miyazaki	strategic	192.0K	¥1,339	-9.3%	¥2M ($12K)
2023-11-30	SELL	unknown	株式会社宮崎 Miyazaki Co., Ltd.	activist	952.0K	¥1,339	-9.3%	¥4M ($24K)
2021-12-27	SELL	unknown	宮崎浩美 Miyazaki Hiromi	strategic	1.2M	¥1,630	+10.3%	¥61M ($395K)

Frequently asked questions

Who has been buying SERAKU Co., Ltd. stock?: 6 distinct investors have filed 5 disclosed large-shareholding filings in SERAKU Co., Ltd. (6199), most recently on 2026-04-07. 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 SERAKU Co., Ltd. have?: SERAKU Co., Ltd. has 5 buy-side and 17 sell-side disclosures on record, covering ¥1.1B ($7.0M) in total reported value, spanning 2021-12-27 to 2026-04-07.
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.

More on this data

Every trade listed above comes from an official regulatory disclosure. For how StockDrifts scores these disclosures, see the Japan insider signal tier research, or browse every Japanese stock we track.