Who has been buying Interfactory, Inc. stock?

4 distinct investors have filed 1 disclosed large-shareholding filings in Interfactory, Inc. (4057), most recently on 2025-02-10. 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 Interfactory, Inc. have?

Interfactory, Inc. has 1 buy-side and 18 sell-side disclosures on record, covering ¥837M ($5.4M) in total reported value, spanning 2021-04-06 to 2025-02-10.

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.

Interfactory, Inc. 4057

Company

株式会社インターファクトリーInterfactory, Inc.

Investors

Buys

Total Value

¥837M ($5.4M)

Avg Return

-52.16%

Last Filing

2025-02-10

Interfactory, Inc. (4057) has 1 disclosed large-shareholding filings and 18 disclosed disposals on record, filed by 4 distinct investors. Together those filings cover ¥837M ($5.4M) in reported transaction value. The earliest filing StockDrifts holds for Interfactory, Inc. is dated 2021-04-06; the most recent is 2025-02-10. Across these filings the average return since disclosure is -52.16%, 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
2026-08-31	BUY	unknown	株式会社ケイエイビー	activist	220.0K	¥360	-	-
2026-08-31	BUY	unknown	蕪木有紀	strategic	200.0K	¥360	-	-
2026-08-31	BUY	unknown	蕪木登	activist	1.4M	¥360	-	-
2026-08-28	BUY	unknown	株式会社ケイエイビー	activist	220.0K	¥354	-	-
2026-08-28	BUY	unknown	蕪木有紀	strategic	200.0K	¥354	-	-
2026-08-28	SELL	unknown	蕪木登	activist	1.4M	¥354	+0.6%	¥146K ($942)
2025-02-10	BUY	unknown	株式会社ケイエイビー KAB Co., Ltd.	activist	220.0K	¥494	-	¥109M ($701K)
2025-02-10	SELL	unknown	蕪木登 NOBORU KABURAKI	activist	1.4M	¥494	+28.7%	¥113M ($731K)
2025-02-10	SELL	unknown	蕪木有紀 Yuki Kabuki	activist	200.0K	¥494	+28.7%	¥611K ($4K)
2023-08-30	SELL	unknown	蕪木登 NOBORU KABURAKI	activist	1.6M	¥689	+48.9%	¥10M ($62K)
2023-08-30	SELL	unknown	蕪木有紀 Yuki Kabuki	strategic	200.0K	¥689	+48.9%	¥1M ($7K)
2023-07-13	SELL	unknown	SMBC日興証券株式会社 SMBC Nikko Securities Inc.	other	600	¥760	+53.7%	¥5M ($34K)
2023-07-07	SELL	subscription	SMBC日興証券株式会社 SMBC Nikko Securities Inc.	other	882.3K	¥722	+51.3%	¥43M ($275K)
2023-03-06	SELL	subscription	SMBC日興証券株式会社 SMBC Nikko Securities Inc.	other	947.3K	¥807	+56.4%	¥33M ($212K)
2023-02-17	SELL	unknown	蕪木登 NOBORU KABURAKI	activist	1.6M	¥769	+54.2%	¥18M ($117K)
2023-02-17	SELL	unknown	蕪木登 NOBORU KABURAKI	activist	1.6M	¥769	+54.2%	¥18M ($117K)
2023-02-17	SELL	unknown	蕪木有紀 Yuki Kabuki	strategic	200.0K	¥769	+54.2%	¥2M ($14K)
2023-02-17	SELL	unknown	蕪木有紀 Yuki Kabuki	strategic	200.0K	¥769	+54.2%	¥2M ($14K)
2023-02-03	SELL	subscription	SMBC日興証券株式会社 SMBC Nikko Securities Inc.	other	991.7K	¥788	+55.3%	¥20M ($126K)
2023-01-16	BUY	subscription	SMBC日興証券株式会社 SMBC Nikko Securities Inc.	other	1.0M	¥809	-56.5%	¥837M ($5.4M)
2022-09-15	SELL	unknown	蕪木登 NOBORU KABURAKI	activist	1.6M	¥1,211	+70.9%	¥7M ($47K)
2022-09-15	SELL	unknown	蕪木有紀 Yuki Kabuki	strategic	200.0K	¥1,211	+70.9%	¥970K ($6K)
2022-09-15	SELL	unknown	蕪木有紀 Yuki Kabuki	strategic	200.0K	¥1,211	+70.9%	¥970K ($6K)
2022-09-15	SELL	unknown	蕪木登 NOBORU KABURAKI	activist	1.6M	¥1,211	+70.9%	¥7M ($47K)
2021-04-06	SELL	unknown	蕪木有紀 Yuki Kabuki	strategic	200.0K	¥2,868	+87.7%	¥387M ($2.5M)
2021-04-06	SELL	unknown	蕪木登 NOBORU KABURAKI	activist	1.6M	¥2,868	+87.7%	¥66M ($428K)

Frequently asked questions

Who has been buying Interfactory, Inc. stock?: 4 distinct investors have filed 1 disclosed large-shareholding filings in Interfactory, Inc. (4057), most recently on 2025-02-10. 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 Interfactory, Inc. have?: Interfactory, Inc. has 1 buy-side and 18 sell-side disclosures on record, covering ¥837M ($5.4M) in total reported value, spanning 2021-04-06 to 2025-02-10.
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.