Who has been buying Kamei Corporation stock?

5 distinct investors have filed 5 disclosed large-shareholding filings in Kamei Corporation (8037), 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 Kamei Corporation have?

Kamei Corporation has 5 buy-side and 3 sell-side disclosures on record, covering ¥1.8B ($11.4M) in total reported value, spanning 2023-04-07 to 2026-05-12.

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.

Kamei Corporation 8037

Company

カメイ株式会社Kamei Corporation

Investors

Buys

Total Value

¥1.8B ($11.4M)

Avg Return

+43.23%

Last Filing

2026-05-12

Kamei Corporation (8037) has 5 disclosed large-shareholding filings and 3 disclosed disposals on record, filed by 5 distinct investors. Together those filings cover ¥1.8B ($11.4M) in reported transaction value. The earliest filing StockDrifts holds for Kamei Corporation is dated 2023-04-07; the most recent is 2026-05-12. Across these filings the average return since disclosure is +43.23%, 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
2026-09-08	BUY	Market Buy	株式会社UH Partners 2	passive	125.0K	¥4,365	-	¥546M ($3.5M)
2026-09-08	BUY	Market Buy	光通信株式会社	passive	2.2M	¥4,365	+16.4%	¥346M ($2.2M)
2026-05-12	BUY	Market Buy	光通信株式会社 Hikari Tsushin K.K.	passive	2.1M	¥3,345	+51.9%	¥1.1B ($7.4M)
2025-09-29	BUY	Market Buy	光通信株式会社 Hikari Tsushin K.K.	passive	1.7M	¥2,937	+73.0%	¥233M ($1.5M)
2025-08-07	BUY	Market Buy	光通信株式会社 Hikari Tsushin K.K.	passive	1.7M	¥2,688	+89.0%	¥4.4B ($28.6M)
2024-07-08	SELL	negotiated	カメイ不動産株式会社 Kamei Real Estate Co., Ltd.	activist	1.6M	¥2,255	-125.3%	¥1.8B ($11.6M)
2024-07-08	BUY	negotiated	亀井文行 Fumiyuki Kamei	activist	2.5M	¥2,255	-	-
2024-07-08	BUY	negotiated	有限会社亀井興産 Kamei Kosan Ltd.	activist	3.0M	¥2,255	-	-
2024-06-14	BUY	Market Buy	亀井文行 Fumiyuki Kamei	activist	2.5M	¥2,150	+136.3%	¥8M ($52K)
2024-06-14	BUY	Market Buy	カメイ不動産株式会社 Kamei Real Estate Co., Ltd.	activist	2.4M	¥2,150	-	-
2024-06-14	BUY	Market Buy	有限会社亀井興産 Kamei Kosan Ltd.	activist	3.0M	¥2,150	-	-
2023-08-22	SELL	unknown	エフエムアールエルエルシー(FMR LLC) FMR LLC	other	1.6M	¥1,439	-253.0%	¥1.0B ($6.8M)
2023-07-07	SELL	unknown	エフエムアールエルエルシー(FMR LLC) FMR LLC	other	2.3M	¥1,465	-246.8%	¥661M ($4.3M)
2023-04-07	BUY	Market Buy	エフエムアールエルエルシー(FMR LLC) FMR LLC	other	2.8M	¥1,429	+255.5%	¥618M ($4.0M)

Frequently asked questions

Who has been buying Kamei Corporation stock?: 5 distinct investors have filed 5 disclosed large-shareholding filings in Kamei Corporation (8037), 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 Kamei Corporation have?: Kamei Corporation has 5 buy-side and 3 sell-side disclosures on record, covering ¥1.8B ($11.4M) in total reported value, spanning 2023-04-07 to 2026-05-12.
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.