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

8 distinct investors have filed 0 disclosed large-shareholding filings in Cominix Co.,Ltd. (3173), most recently on 2026-02-20. 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 Cominix Co.,Ltd. have?

Cominix Co.,Ltd. has 0 buy-side and 18 sell-side disclosures on record, spanning 2021-04-02 to 2026-02-20.

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.

Cominix Co.,Ltd. 3173

Company

株式会社CominixCominix Co.,Ltd.

Investors

Buys

Total Value

—

Avg Return

—

Last Filing

2026-02-20

Cominix Co.,Ltd. (3173) has 0 disclosed large-shareholding filings and 18 disclosed disposals on record, filed by 8 distinct investors. The earliest filing StockDrifts holds for Cominix Co.,Ltd. is dated 2021-04-02; the most recent is 2026-02-20.

Price & insider activity (12 months)

Recent filings

Date	Type	Source	Insider	Purpose	Shares	Price at filing	Return	Value
2026-08-17	SELL	unknown	林祐介	activist	571.2K	¥1,480	+1.9%	¥443M ($2.9M)
2026-08-17	BUY	Market Buy	大阪ビジネスプラニング有限会社	activist	792.0K	¥1,480	-1.9%	¥444M ($2.9M)
2026-02-20	BUY	unknown	柳川修一	activist	425.6K	¥992	-	-
2026-02-20	BUY	unknown	有限会社柳川住宅	activist	350.0K	¥992	-	¥347M ($2.2M)
2026-02-20	SELL	unknown	柳川重昌	activist	172.0K	¥992	-46.4%	¥199M ($1.3M)
2026-02-20	SELL	unknown	柳川妙子	activist	183.6K	¥992	-46.4%	¥217M ($1.4M)
2026-02-20	BUY	unknown	柳川修一	activist	425.6K	¥992	-	-
2026-02-20	BUY	unknown	有限会社柳川住宅	activist	350.0K	¥992	-	¥347M ($2.2M)
2026-02-20	SELL	unknown	柳川重昌	activist	172.0K	¥992	-46.4%	¥199M ($1.3M)
2026-02-20	SELL	unknown	柳川妙子	activist	183.6K	¥992	-46.4%	¥217M ($1.4M)
2025-04-01	BUY	unknown	柳川修一 SYUICHI YANAGAWA	activist	425.6K	¥875	-	-
2023-04-06	SELL	unknown	柳川十糸久 Yanagawa Toshihisa	activist	306.1K	¥756	-92.1%	¥54M ($348K)
2023-04-06	SELL	unknown	柳川十糸久 Yanagawa Toshihisa	activist	94.3K	¥756	-92.1%	¥160M ($1.0M)
2023-04-06	BUY	unknown	柳川歩 Ayumu Yanagawa	activist	247.1K	¥756	-	-
2023-04-06	BUY	unknown	柳川歩 Ayumu Yanagawa	activist	247.1K	¥756	-	-
2023-01-05	SELL	unknown	柳川十糸久 Yanagawa Toshihisa	activist	377.6K	¥729	-99.2%	¥26M ($165K)
2023-01-05	BUY	unknown	柳川歩 Ayumu Yanagawa	activist	247.1K	¥729	-	-
2022-10-04	SELL	unknown	柳川十糸久 Yanagawa Toshihisa	activist	412.6K	¥716	-102.8%	¥3M ($22K)
2022-10-04	BUY	unknown	柳川歩 Ayumu Yanagawa	activist	247.1K	¥716	-	-
2022-08-19	SELL	unknown	林祐介 YUSUKE HAYASHI	activist	871.2K	¥720	-101.7%	¥42M ($268K)
2022-08-19	BUY	unknown	大阪ビジネスプラニング有限会社 Osaka Business Planning Co., Ltd.	activist	492.0K	¥720	-	-
2022-07-27	BUY	unknown	柳川修一 SYUICHI YANAGAWA	activist	425.6K	¥720	-	-
2022-07-27	BUY	unknown	柳川修一 SYUICHI YANAGAWA	activist	425.6K	¥720	-	-
2022-07-05	SELL	unknown	柳川十糸久 Yanagawa Toshihisa	activist	417.6K	¥723	-100.8%	¥3M ($22K)
2022-07-05	BUY	unknown	柳川歩 Ayumu Yanagawa	activist	247.1K	¥723	-	-
2022-05-13	SELL	unknown	柳川十糸久 Yanagawa Toshihisa	activist	442.6K	¥730	-98.9%	¥52M ($333K)
2022-05-13	BUY	unknown	柳川歩 Ayumu Yanagawa	activist	247.1K	¥730	-	-
2022-04-04	SELL	unknown	柳川十糸久 Yanagawa Toshihisa	activist	422.6K	¥728	-99.5%	¥15M ($94K)
2022-04-04	SELL	unknown	柳川十糸久 Yanagawa Toshihisa	activist	422.6K	¥728	-99.5%	¥66M ($426K)
2022-04-04	BUY	unknown	柳川歩 Ayumu Yanagawa	activist	247.1K	¥728	-	-
2022-04-04	BUY	unknown	柳川歩 Ayumu Yanagawa	activist	247.1K	¥728	-	-
2022-01-05	SELL	unknown	柳川十糸久 Yanagawa Toshihisa	activist	512.9K	¥736	-97.3%	¥13M ($82K)
2022-01-05	BUY	unknown	柳川歩 Ayumu Yanagawa	activist	247.1K	¥736	-	-
2021-10-04	SELL	unknown	柳川十糸久 Yanagawa Toshihisa	activist	530.1K	¥729	-99.2%	¥23M ($149K)
2021-10-04	SELL	unknown	柳川十糸久 Yanagawa Toshihisa	activist	530.1K	¥729	-99.2%	¥23M ($149K)
2021-10-04	BUY	unknown	柳川歩 Ayumu Yanagawa	activist	247.1K	¥729	-	-
2021-10-04	BUY	unknown	柳川歩 Ayumu Yanagawa	activist	247.1K	¥729	-	-
2021-07-06	SELL	negotiated	柳川十糸久 Yanagawa Toshihisa	activist	561.9K	¥744	-95.2%	¥16M ($102K)
2021-07-06	SELL	negotiated	柳川十糸久 Yanagawa Toshihisa	activist	561.9K	¥744	-95.2%	¥16M ($102K)
2021-07-06	BUY	negotiated	柳川歩 Ayumu Yanagawa	activist	247.1K	¥744	-	-
2021-07-06	BUY	negotiated	柳川歩 Ayumu Yanagawa	activist	247.1K	¥744	-	-
2021-04-02	BUY	negotiated	柳川十糸久 Yanagawa Toshihisa	activist	583.3K	¥646.158	-	-
2021-04-02	BUY	negotiated	柳川歩 Ayumu Yanagawa	activist	247.1K	¥646.158	-	-

Frequently asked questions

Who has been buying Cominix Co.,Ltd. stock?: 8 distinct investors have filed 0 disclosed large-shareholding filings in Cominix Co.,Ltd. (3173), most recently on 2026-02-20. 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 Cominix Co.,Ltd. have?: Cominix Co.,Ltd. has 0 buy-side and 18 sell-side disclosures on record, spanning 2021-04-02 to 2026-02-20.
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.