Who has been buying Sourcenext Corporation stock?

5 distinct investors have filed 2 disclosed large-shareholding filings in Sourcenext Corporation (4344), most recently on 2026-02-24. 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 Sourcenext Corporation have?

Sourcenext Corporation has 2 buy-side and 10 sell-side disclosures on record, covering ¥30M ($195K) in total reported value, spanning 2024-10-25 to 2026-02-24.

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.

Sourcenext Corporation 4344

Company

ソースネクスト株式会社Sourcenext Corporation

Investors

Buys

Total Value

¥30M ($195K)

Avg Return

-32.98%

Last Filing

2026-02-24

Sourcenext Corporation (4344) has 2 disclosed large-shareholding filings and 10 disclosed disposals on record, filed by 5 distinct investors. Together those filings cover ¥30M ($195K) in reported transaction value. The earliest filing StockDrifts holds for Sourcenext Corporation is dated 2024-10-25; the most recent is 2026-02-24. Across these filings the average return since disclosure is -32.98%, 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
2026-02-24	SELL	negotiated	松田憲幸	activist	35.6M	¥127	+18.1%	¥31M ($200K)
2026-02-24	SELL	negotiated	松田里美	strategic	3.2M	¥127	+18.1%	¥20M ($129K)
2026-02-24	SELL	negotiated	リソース株式会社	strategic	680.0K	¥127	+18.1%	¥501K ($3K)
2025-12-22	SELL	negotiated	リソースホールディングズ株式会社	strategic	680.0K	¥152	+31.6%	¥598K ($4K)
2025-12-22	SELL	negotiated	松田里美	strategic	3.1M	¥152	+31.6%	¥15M ($95K)
2025-12-22	BUY	negotiated	リソースホールディングズ株式会社	strategic	680.0K	¥152	-	-
2025-12-22	SELL	negotiated	松田憲幸	activist	35.6M	¥152	+31.6%	¥37M ($239K)
2025-12-22	SELL	negotiated	松田里美	strategic	3.1M	¥152	+31.6%	¥28M ($181K)
2025-12-22	BUY	negotiated	松田憲幸	activist	35.6M	¥152	-	-
2025-03-31	SELL	unknown	ユービーエス・エイ・ジー(銀行) UBS AG	other	18.1M	¥217	+52.1%	¥307M ($2.0M)
2025-03-31	BUY	unknown	UBS証券株式会社 UBS Securities Co., Ltd.	other	0	¥217	-	-
2025-02-19	SELL	unknown	ユービーエス・エイ・ジー(銀行) UBS AG	other	19.7M	¥227	+54.2%	¥320M ($2.1M)
2025-02-19	SELL	unknown	UBS証券株式会社 UBS Securities Co., Ltd.	other	0	¥227	+54.2%	¥3.7B ($24.1M)
2024-10-25	BUY	unknown	ユービーエス・エイ・ジー(銀行) UBS AG	other	21.4M	¥191	-45.5%	¥4.1B ($26.3M)
2024-10-25	BUY	unknown	UBS証券株式会社 UBS Securities Co., Ltd.	other	158.0K	¥191	-45.5%	¥30M ($195K)

Frequently asked questions

Who has been buying Sourcenext Corporation stock?: 5 distinct investors have filed 2 disclosed large-shareholding filings in Sourcenext Corporation (4344), most recently on 2026-02-24. 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 Sourcenext Corporation have?: Sourcenext Corporation has 2 buy-side and 10 sell-side disclosures on record, covering ¥30M ($195K) in total reported value, spanning 2024-10-25 to 2026-02-24.
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.