Who has been buying PIA Corporation stock?

7 distinct investors have filed 1 disclosed large-shareholding filings in PIA Corporation (4337), most recently on 2025-03-10. 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 PIA Corporation have?

PIA Corporation has 1 buy-side and 8 sell-side disclosures on record, covering ¥3.8B ($24.7M) in total reported value, spanning 2023-10-06 to 2025-03-10.

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.

PIA Corporation 4337

Company

ぴあ株式会社PIA Corporation

Investors

Buys

Total Value

¥3.8B ($24.7M)

Avg Return

-2.13%

Last Filing

2025-03-10

PIA Corporation (4337) has 1 disclosed large-shareholding filings and 8 disclosed disposals on record, filed by 7 distinct investors. Together those filings cover ¥3.8B ($24.7M) in reported transaction value. The earliest filing StockDrifts holds for PIA Corporation is dated 2023-10-06; the most recent is 2025-03-10. Across these filings the average return since disclosure is -2.13%, 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
2025-03-10	SELL	unknown	KDDI株式会社 KDDI CORPORATION	strategic	204.5K	¥2,720	+4.4%	¥3.5B ($22.6M)
2025-03-10	SELL	unknown	KDDI株式会社 KDDI CORPORATION	strategic	1.4M	¥2,720	+4.4%	¥28M ($180K)
2025-03-10	SELL	unknown	KDDIパートナーズ株式会社 KDDI Partners Co., Ltd.	strategic	168.4K	¥2,720	+4.4%	¥4M ($26K)
2025-03-10	SELL	unknown	KDDIパートナーズ株式会社 KDDI Partners Co., Ltd.	unknown	0	¥2,720	+4.4%	¥490M ($3.2M)
2025-03-07	SELL	negotiated	株式会社セブン&アイ・ホールディングス Seven & i Holdings Co., Ltd.	strategic	1.4M	¥2,844	+8.6%	¥440M ($2.8M)
2025-03-07	SELL	negotiated	株式会社セブン‐イレブン・ジャパン Seven-Eleven Japan Co., Ltd.	strategic	704.7K	¥2,844	+8.6%	¥218M ($1.4M)
2025-03-07	SELL	negotiated	株式会社セブン&アイ・ネットメディア Seven & i Net Media Co., Ltd.	strategic	704.7K	¥2,844	+8.6%	¥218M ($1.4M)
2023-10-06	BUY	unknown	TOPPAN株式会社 TOPPAN Inc.	strategic	1.1M	¥3,525	-26.2%	¥3.8B ($24.7M)
2023-10-06	SELL	unknown	TOPPANホールディングス株式会社 TOPPAN Holdings Inc.	strategic	0	¥3,525	+26.2%	¥4.2B ($27.0M)

Frequently asked questions

Who has been buying PIA Corporation stock?: 7 distinct investors have filed 1 disclosed large-shareholding filings in PIA Corporation (4337), most recently on 2025-03-10. 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 PIA Corporation have?: PIA Corporation has 1 buy-side and 8 sell-side disclosures on record, covering ¥3.8B ($24.7M) in total reported value, spanning 2023-10-06 to 2025-03-10.
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.