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

4 distinct investors have filed 2 disclosed large-shareholding filings in Socialwire Co., Ltd. (3929), most recently on 2026-04-13. 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 Socialwire Co., Ltd. have?

Socialwire Co., Ltd. has 2 buy-side and 8 sell-side disclosures on record, covering ¥3.1B ($19.8M) in total reported value, spanning 2021-04-06 to 2026-04-13.

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.

Socialwire Co., Ltd. 3929

Company

ソーシャルワイヤー株式会社Socialwire Co., Ltd.

Investors

Buys

Total Value

¥3.1B ($19.8M)

Avg Return

+21.35%

Last Filing

2026-04-13

Socialwire Co., Ltd. (3929) has 2 disclosed large-shareholding filings and 8 disclosed disposals on record, filed by 4 distinct investors. Together those filings cover ¥3.1B ($19.8M) in reported transaction value. The earliest filing StockDrifts holds for Socialwire Co., Ltd. is dated 2021-04-06; the most recent is 2026-04-13. Across these filings the average return since disclosure is +21.35%, 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
2026-04-13	SELL	Market Buy	ユナイテッド株式会社 UNITED, Inc.	passive	315.1K	¥325	+20.0%	¥97M ($626K)
2026-02-26	SELL	unknown	矢田峰之 Mineyuki Yata	activist	1.2M	¥309	+15.9%	¥38M ($246K)
2026-02-26	SELL	unknown	矢田峰之 Mineyuki Yata	activist	1.2M	¥309	+15.9%	¥38M ($246K)
2024-07-03	SELL	unknown	矢田峰之 Mineyuki Yata	activist	1.3M	¥264	+1.5%	¥314M ($2.0M)
2024-07-02	BUY	unknown	株式会社ジーニー Geniee, Inc.	corporate	5.7M	¥267	-2.6%	¥1.5B ($9.9M)
2024-07-02	BUY	unknown	株式会社ジーニー Geniee, Inc.	corporate	5.7M	¥267	-2.6%	¥1.5B ($9.9M)
2024-05-01	BUY	private	矢田峰之 Mineyuki Yata	activist	1.3M	¥259	-	-
2024-03-14	BUY	Market Buy	ユナイテッド株式会社 UNITED, Inc.	passive	316.4K	¥256	-	¥30M ($197K)
2024-03-14	SELL	Market Buy	ユナイテッド株式会社 UNITED, Inc.	passive	316.4K	¥256	-1.6%	¥30M ($197K)
2023-11-16	SELL	private	矢田峰之 Mineyuki Yata	activist	1.3M	¥238	-9.2%	¥12M ($76K)
2023-09-22	SELL	private	矢田峰之 Mineyuki Yata	activist	1.3M	¥292	+11.0%	¥14M ($93K)
2021-04-06	SELL	Market Buy	三井住友DSアセットマネジメント株式会社 Sumitomo Mitsui DS Asset Management Company, Limited	passive	255.5K	¥795	+67.3%	¥60M ($385K)

Frequently asked questions

Who has been buying Socialwire Co., Ltd. stock?: 4 distinct investors have filed 2 disclosed large-shareholding filings in Socialwire Co., Ltd. (3929), most recently on 2026-04-13. 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 Socialwire Co., Ltd. have?: Socialwire Co., Ltd. has 2 buy-side and 8 sell-side disclosures on record, covering ¥3.1B ($19.8M) in total reported value, spanning 2021-04-06 to 2026-04-13.
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.