Who has been buying Collabos Corporation stock?

3 distinct investors have filed 2 disclosed large-shareholding filings in Collabos Corporation (3908), most recently on 2025-12-01. 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 Collabos Corporation have?

Collabos Corporation has 2 buy-side and 11 sell-side disclosures on record, covering ¥302M ($1.9M) in total reported value, spanning 2025-08-27 to 2025-12-01.

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.

Collabos Corporation 3908

Company

株式会社コラボスCollabos Corporation

Investors

Buys

Total Value

¥302M ($1.9M)

Avg Return

-12.40%

Last Filing

2025-12-01

Collabos Corporation (3908) has 2 disclosed large-shareholding filings and 11 disclosed disposals on record, filed by 3 distinct investors. Together those filings cover ¥302M ($1.9M) in reported transaction value. The earliest filing StockDrifts holds for Collabos Corporation is dated 2025-08-27; the most recent is 2025-12-01. Across these filings the average return since disclosure is -12.40%, 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
2025-12-01	SELL	unknown	三菱UFJモルガン・スタンレー証券株式会社 Mitsubishi UFJ Morgan Stanley Securities Co., Ltd.	other	0	¥283	-28.6%	¥104M ($670K)
2025-11-27	SELL	Market Buy	コムテック株式会社 COMTEC INC.	passive	192.6K	¥284	-28.2%	¥55M ($354K)
2025-11-25	SELL	unknown	三菱UFJモルガン・スタンレー証券株式会社 Mitsubishi UFJ Morgan Stanley Securities Co., Ltd.	other	366.0K	¥278	-30.9%	¥16M ($105K)
2025-11-18	BUY	unknown	三菱UFJモルガン・スタンレー証券株式会社 Mitsubishi UFJ Morgan Stanley Securities Co., Ltd.	other	394.3K	¥296	-	¥9M ($60K)
2025-11-18	SELL	unknown	三菱UFJモルガン・スタンレー証券株式会社 Mitsubishi UFJ Morgan Stanley Securities Co., Ltd.	other	394.3K	¥296	-23.0%	¥9M ($60K)
2025-11-10	SELL	unknown	三菱UFJモルガン・スタンレー証券株式会社 Mitsubishi UFJ Morgan Stanley Securities Co., Ltd.	other	425.7K	¥314	-15.9%	¥36M ($232K)
2025-10-30	SELL	unknown	三菱UFJモルガン・スタンレー証券株式会社 Mitsubishi UFJ Morgan Stanley Securities Co., Ltd.	other	539.9K	¥328	-11.0%	¥17M ($113K)
2025-10-15	SELL	unknown	三菱UFJモルガン・スタンレー証券株式会社 Mitsubishi UFJ Morgan Stanley Securities Co., Ltd.	other	593.2K	¥345	-5.5%	¥18M ($113K)
2025-10-08	SELL	unknown	三菱UFJモルガン・スタンレー証券株式会社 Mitsubishi UFJ Morgan Stanley Securities Co., Ltd.	other	643.8K	¥369	+1.4%	¥19M ($122K)
2025-10-08	SELL	unknown	三菱UFJモルガン・スタンレー証券株式会社 Mitsubishi UFJ Morgan Stanley Securities Co., Ltd.	other	695.3K	¥369	+1.4%	¥19M ($121K)
2025-10-08	BUY	unknown	三菱UFJモルガン・スタンレー証券株式会社 Mitsubishi UFJ Morgan Stanley Securities Co., Ltd.	other	746.2K	¥369	-1.4%	¥275M ($1.8M)
2025-09-02	SELL	negotiated	茂木貴雄 Takao Motegi	activist	1.7M	¥399	+8.8%	¥153M ($984K)
2025-08-29	BUY	negotiated	茂木貴雄 Takao Motegi	activist	2.3M	¥422	-	¥26M ($166K)
2025-08-28	SELL	Market Buy	コムテック株式会社 COMTEC INC.	passive	385.6K	¥425	+14.3%	¥92M ($591K)
2025-08-27	BUY	negotiated	茂木貴雄 Takao Motegi	activist	2.3M	¥441	-	¥27M ($173K)
2025-08-27	BUY	Market Buy	茂木貴雄 Takao Motegi	activist	2.3M	¥441	-17.5%	¥27M ($173K)

Frequently asked questions

Who has been buying Collabos Corporation stock?: 3 distinct investors have filed 2 disclosed large-shareholding filings in Collabos Corporation (3908), most recently on 2025-12-01. 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 Collabos Corporation have?: Collabos Corporation has 2 buy-side and 11 sell-side disclosures on record, covering ¥302M ($1.9M) in total reported value, spanning 2025-08-27 to 2025-12-01.
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.