Who has been buying Signpost Corporation stock?

4 distinct investors have filed 1 disclosed large-shareholding filings in Signpost Corporation (3996), most recently on 2025-04-21. 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 Signpost Corporation have?

Signpost Corporation has 1 buy-side and 11 sell-side disclosures on record, covering ¥760M ($4.9M) in total reported value, spanning 2021-03-17 to 2025-04-21.

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.

Signpost Corporation 3996

Company

サインポスト株式会社Signpost Corporation

Investors

Buys

Total Value

¥760M ($4.9M)

Avg Return

-81.16%

Last Filing

2025-04-21

Signpost Corporation (3996) has 1 disclosed large-shareholding filings and 11 disclosed disposals on record, filed by 4 distinct investors. Together those filings cover ¥760M ($4.9M) in reported transaction value. The earliest filing StockDrifts holds for Signpost Corporation is dated 2021-03-17; the most recent is 2025-04-21. Across these filings the average return since disclosure is -81.16%, 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
2025-04-21	SELL	unknown	奥井裕介 Okui Yusuke	strategic	590.0K	¥339	+35.7%	¥44M ($285K)
2024-12-26	SELL	unknown	道しるべ株式会社 Michishirube Co.	strategic	1.4M	¥420	+48.1%	¥53M ($340K)
2024-04-22	SELL	unknown	奥井裕介 Okui Yusuke	strategic	720.0K	¥645	+66.2%	¥91M ($585K)
2023-05-17	SELL	negotiated	蒲原寧 Kambara Yasushi	activist	2.9M	¥545	+60.0%	¥229M ($1.5M)
2023-05-15	SELL	unknown	奥井裕介 Okui Yusuke	strategic	860.0K	¥572	+61.9%	¥75M ($481K)
2022-04-22	BUY	unknown	奥井裕介 Okui Yusuke	strategic	990.0K	¥954	-	¥124M ($802K)
2022-04-22	SELL	unknown	奥井裕介 Okui Yusuke	strategic	990.0K	¥954	+77.2%	¥124M ($802K)
2021-07-27	SELL	unknown	道しるべ株式会社 Michishirube Co.	strategic	1.5M	¥717	+69.6%	¥102M ($656K)
2021-07-09	BUY	negotiated	蒲原寧 Kambara Yasushi	activist	3.3M	¥789	-	¥359M ($2.3M)
2021-07-09	SELL	negotiated	蒲原寧 Kambara Yasushi	activist	3.3M	¥789	+72.4%	¥359M ($2.3M)
2021-04-19	SELL	unknown	道しるべ株式会社 Michishirube Co.	strategic	1.6M	¥1,065	+79.5%	¥58M ($374K)
2021-04-07	SELL	negotiated	奥井裕介 Okui Yusuke	activist	1.1M	¥1,074	+79.7%	¥166M ($1.1M)
2021-04-05	SELL	unknown	いちよし証券株式会社 Ichiyoshi Securities Co., Ltd.	other	459.4K	¥1,140	+80.9%	¥215M ($1.4M)
2021-03-17	BUY	unknown	いちよし証券株式会社 Ichiyoshi Securities Co., Ltd.	other	650.3K	¥1,168	-81.3%	¥760M ($4.9M)

Frequently asked questions

Who has been buying Signpost Corporation stock?: 4 distinct investors have filed 1 disclosed large-shareholding filings in Signpost Corporation (3996), most recently on 2025-04-21. 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 Signpost Corporation have?: Signpost Corporation has 1 buy-side and 11 sell-side disclosures on record, covering ¥760M ($4.9M) in total reported value, spanning 2021-03-17 to 2025-04-21.
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.