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

6 distinct investors have filed 6 disclosed large-shareholding filings in Microwave Chemical Co., Ltd. (9227), most recently on 2023-12-13. 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 Microwave Chemical Co., Ltd. have?

Microwave Chemical Co., Ltd. has 6 buy-side and 13 sell-side disclosures on record, covering ¥7.8B ($50.5M) in total reported value, spanning 2022-06-30 to 2023-12-13.

Where does StockDrifts get Microwave 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.

Microwave Chemical Co., Ltd. 9227

Company

マイクロ波化学株式会社Microwave Chemical Co., Ltd.

Investors

Buys

Total Value

¥7.8B ($50.5M)

Avg Return

+43.09%

Last Filing

2023-12-13

Microwave Chemical Co., Ltd. (9227) has 6 disclosed large-shareholding filings and 13 disclosed disposals on record, filed by 6 distinct investors. Together those filings cover ¥7.8B ($50.5M) in reported transaction value. The earliest filing StockDrifts holds for Microwave Chemical Co., Ltd. is dated 2022-06-30; the most recent is 2023-12-13. 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 +43.09%, 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
2023-12-13	SELL	negotiated	三井化学株式会社 Mitsui Chemicals, Inc.	strategic	771.7K	¥1,256	+4.8%	¥12M ($74K)
2022-09-30	SELL	Market Buy	株式会社東京大学エッジキャピタルパートナーズ The University of Tokyo Edge Capital Partners Co., Ltd.	passive	301.2K	¥830	-44.1%	¥406M ($2.6M)
2022-09-30	SELL	Market Buy	ジャフコグループ株式会社 JAFCO Group Co., Ltd.	passive	904.7K	¥830	-44.1%	¥302M ($1.9M)
2022-09-30	SELL	Market Buy	ジャフコグループ株式会社 JAFCO Group Co., Ltd.	passive	659.3K	¥830	-44.1%	¥203M ($1.3M)
2022-08-31	SELL	Market Buy	株式会社INCJ INCJ, Ltd.	passive	555.1K	¥861	-38.9%	¥231M ($1.5M)
2022-08-31	SELL	Market Buy	株式会社東京大学エッジキャピタルパートナーズ The University of Tokyo Edge Capital Partners Co., Ltd.	passive	791.0K	¥861	-38.9%	¥183M ($1.2M)
2022-08-26	SELL	Market Buy	株式会社東京大学エッジキャピタルパートナーズ The University of Tokyo Edge Capital Partners Co., Ltd.	passive	1.0M	¥870	-37.5%	¥315M ($2.0M)
2022-08-26	SELL	Market Buy	ジャフコグループ株式会社 JAFCO Group Co., Ltd.	passive	1.3M	¥870	-37.5%	¥252M ($1.6M)
2022-08-25	SELL	Market Buy	株式会社INCJ INCJ, Ltd.	passive	1.2M	¥890	-34.4%	¥182M ($1.2M)
2022-08-25	SELL	Market Buy	株式会社INCJ INCJ, Ltd.	passive	821.9K	¥890	-34.4%	¥299M ($1.9M)
2022-07-22	SELL	Market Buy	ジャフコグループ株式会社 JAFCO Group Co., Ltd.	passive	1.6M	¥771	-55.1%	¥365M ($2.4M)
2022-07-22	SELL	Market Buy	株式会社東京大学エッジキャピタルパートナーズ The University of Tokyo Edge Capital Partners Co., Ltd.	passive	1.4M	¥771	-55.1%	¥424M ($2.7M)
2022-07-20	SELL	Market Buy	株式会社INCJ INCJ, Ltd.	passive	1.4M	¥800	-49.5%	¥336M ($2.2M)
2022-07-01	BUY	Market Buy	株式会社INCJ INCJ, Ltd.	passive	1.8M	¥758	+57.8%	¥1.4B ($8.7M)
2022-07-01	BUY	Market Buy	株式会社東京大学エッジキャピタルパートナーズ The University of Tokyo Edge Capital Partners Co., Ltd.	passive	1.9M	¥758	+57.8%	¥1.5B ($9.4M)
2022-06-30	BUY	negotiated	三井化学株式会社 Mitsui Chemicals, Inc.	strategic	771.7K	¥881	+35.8%	¥680M ($4.4M)
2022-06-30	BUY	unknown	吉野巌 Iwao YOSHINO	activist	1.5M	¥881	+35.8%	¥1.3B ($8.4M)
2022-06-30	BUY	unknown	塚原保徳 Yasunori TSUKAHARA	activist	1.4M	¥881	+35.8%	¥1.3B ($8.1M)
2022-06-30	BUY	Market Buy	ジャフコグループ株式会社 JAFCO Group Co., Ltd.	passive	2.0M	¥881	+35.8%	¥1.8B ($11.5M)

Frequently asked questions

Who has been buying Microwave Chemical Co., Ltd. stock?: 6 distinct investors have filed 6 disclosed large-shareholding filings in Microwave Chemical Co., Ltd. (9227), most recently on 2023-12-13. 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 Microwave Chemical Co., Ltd. have?: Microwave Chemical Co., Ltd. has 6 buy-side and 13 sell-side disclosures on record, covering ¥7.8B ($50.5M) in total reported value, spanning 2022-06-30 to 2023-12-13.
Where does StockDrifts get Microwave 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 Microwave Chemical Co., Ltd.. For how StockDrifts scores these disclosures, see the Japan insider signal tier research, or browse every Japanese stock we track.