Who has been buying Global Communication Planning Co.,Ltd. stock?

7 distinct investors have filed 10 disclosed large-shareholding filings in Global Communication Planning Co.,Ltd. (4073), most recently on 2025-08-22. 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 Global Communication Planning Co.,Ltd. have?

Global Communication Planning Co.,Ltd. has 10 buy-side and 13 sell-side disclosures on record, covering ¥3.9B ($24.9M) in total reported value, spanning 2021-09-29 to 2025-08-22.

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.

Global Communication Planning Co.,Ltd. 4073

Company

株式会社ジィ・シィ企画Global Communication Planning Co.,Ltd.

Investors

Buys

Total Value

¥3.9B ($24.9M)

Avg Return

-63.68%

Last Filing

2025-08-22

Global Communication Planning Co.,Ltd. (4073) has 10 disclosed large-shareholding filings and 13 disclosed disposals on record, filed by 7 distinct investors. Together those filings cover ¥3.9B ($24.9M) in reported transaction value. The earliest filing StockDrifts holds for Global Communication Planning Co.,Ltd. is dated 2021-09-29; the most recent is 2025-08-22. Across these filings the average return since disclosure is -63.68%, 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
2026-08-27	SELL	unknown	金子京子	activist	84.4K	¥495	-28.7%	¥628K ($4K)
2026-08-27	SELL	unknown	株式会社コミューン	activist	229.4K	¥495	-28.7%	¥31M ($203K)
2025-08-22	SELL	unknown	株式会社コミューン COMMUNE CO.LTD.	activist	289.4K	¥610	-4.4%	¥73M ($474K)
2025-08-22	BUY	unknown	金子京子 Kyoko Kaneko	activist	84.4K	¥610	-	-
2025-08-21	BUY	Market Buy	株式会社トランザクション・メディア・ネットワークス Transaction Media Networks Inc.	other	628.0K	¥597	+6.7%	¥71M ($461K)
2025-03-19	BUY	Market Buy	株式会社トランザクション・メディア・ネットワークス代表取締役社長大高敦 Transaction Media Networks Inc.	other	508.0K	¥738	-13.7%	¥100M ($642K)
2025-03-17	SELL	unknown	矢ヶ部啓一 Yakabe Keiichi	strategic	120.0K	¥1,076	+40.8%	¥52M ($334K)
2025-03-17	SELL	unknown	小坂大輔 Kosaka Daisuke	strategic	73.0K	¥1,076	+40.8%	¥57M ($367K)
2024-08-27	SELL	unknown	金子京子 Kyoko Kaneko	activist	84.4K	¥681	+6.5%	¥171K ($1K)
2024-08-27	SELL	unknown	株式会社コミューン COMMUNE CO.LTD.	activist	409.4K	¥681	+6.5%	¥35M ($226K)
2024-03-01	SELL	unknown	金子哲司 Kaneko Tetsuji	unknown	0	¥923	+31.0%	¥213M ($1.4M)
2024-03-01	BUY	negotiated	株式会社トランザクション・メディア・ネットワークス Transaction Media Networks Inc.	strategic	372.0K	¥923	-31.0%	¥343M ($2.2M)
2024-03-01	SELL	unknown	金子京子 Kyoko Kaneko	activist	84.4K	¥923	+31.0%	¥3M ($16K)
2024-03-01	BUY	unknown	株式会社コミューン COMMUNE CO.LTD.	activist	459.4K	¥923	-31.0%	¥418M ($2.7M)
2021-11-26	SELL	unknown	金子哲司 Kaneko Tetsuji	activist	224.0K	¥1,351	+52.9%	¥14M ($93K)
2021-11-26	SELL	unknown	金子哲司 Kaneko Tetsuji	activist	224.0K	¥1,351	+52.9%	¥14M ($93K)
2021-11-26	SELL	unknown	金子京子 Kyoko Kaneko	activist	84.4K	¥1,351	+52.9%	¥7M ($42K)
2021-11-26	SELL	unknown	株式会社コミューン COMMUNE CO.LTD.	activist	607.4K	¥1,351	+52.9%	¥47M ($306K)
2021-11-26	SELL	unknown	金子京子 Kyoko Kaneko	activist	84.4K	¥1,351	+52.9%	¥7M ($42K)
2021-11-26	SELL	unknown	株式会社コミューン COMMUNE CO.LTD.	activist	607.4K	¥1,351	+52.9%	¥47M ($306K)
2021-10-04	BUY	unknown	小坂大輔 Kosaka Daisuke	strategic	115.4K	¥2,202	-71.1%	¥254M ($1.6M)
2021-09-30	BUY	Market Buy	株式会社アイネット I-NET CORP.	other	160.0K	¥2,800	-77.3%	¥448M ($2.9M)
2021-09-29	BUY	unknown	矢ヶ部啓一 Yakabe Keiichi	activist	153.6K	¥3,500	-81.8%	¥538M ($3.5M)
2021-09-29	BUY	unknown	金子哲司 Kaneko Tetsuji	activist	224.0K	¥3,500	-81.8%	¥784M ($5.1M)
2021-09-29	BUY	unknown	金子京子 Kyoko Kaneko	activist	84.4K	¥3,500	-81.8%	¥295M ($1.9M)
2021-09-29	BUY	unknown	株式会社コミューン COMMUNE CO.LTD.	activist	607.4K	¥3,500	-81.8%	¥2.1B ($13.7M)

Frequently asked questions

Who has been buying Global Communication Planning Co.,Ltd. stock?: 7 distinct investors have filed 10 disclosed large-shareholding filings in Global Communication Planning Co.,Ltd. (4073), most recently on 2025-08-22. 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 Global Communication Planning Co.,Ltd. have?: Global Communication Planning Co.,Ltd. has 10 buy-side and 13 sell-side disclosures on record, covering ¥3.9B ($24.9M) in total reported value, spanning 2021-09-29 to 2025-08-22.
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.