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

12 distinct investors have filed 41 disclosed large-shareholding filings in Gakujo Co., Ltd. (2301), most recently on 2025-12-05. 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 Gakujo Co., Ltd. have?

Gakujo Co., Ltd. has 41 buy-side and 21 sell-side disclosures on record, covering ¥16.3B ($104.9M) in total reported value, spanning 2021-08-03 to 2025-12-05.

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.

Gakujo Co., Ltd. 2301

Company

株式会社学情Gakujo Co., Ltd.

Investors

Buys

Total Value

¥16.3B ($104.9M)

Avg Return

+18.47%

Last Filing

2025-12-05

Gakujo Co., Ltd. (2301) has 41 disclosed large-shareholding filings and 21 disclosed disposals on record, filed by 12 distinct investors. Together those filings cover ¥16.3B ($104.9M) in reported transaction value. The earliest filing StockDrifts holds for Gakujo Co., Ltd. is dated 2021-08-03; the most recent is 2025-12-05. Across these filings the average return since disclosure is +18.47%, 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
2025-12-05	SELL	unknown	三井住友DSアセットマネジメント株式会社	passive	457.2K	¥1,614	-7.9%	¥108M ($697K)
2025-12-05	SELL	unknown	SMBC日興証券株式会社	other	36.3K	¥1,614	-7.9%	¥686M ($4.4M)
2025-11-10	BUY	unknown	中井大志 Taishi Nakai	activist	446.8K	¥1,595	-	¥713M ($4.6M)
2025-11-10	BUY	unknown	中井大志 Taishi Nakai	activist	446.8K	¥1,595	+9.2%	¥10M ($64K)
2025-11-10	BUY	unknown	株式会社アンビシャス Ambitious Co., Ltd.	other	2.3M	¥1,595	-	-
2025-11-10	BUY	unknown	株式会社アンビシャス Ambitious Co., Ltd.	other	2.3M	¥1,595	-	-
2025-10-22	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	524.0K	¥1,738	-0.2%	¥295M ($1.9M)
2025-10-22	BUY	Market Buy	SMBC日興証券株式会社 SMBC Nikko Securities Inc.	other	460.9K	¥1,738	+0.2%	¥16M ($105K)
2025-08-22	BUY	Market Buy	SMBC日興証券株式会社 SMBC Nikko Securities Inc.	other	451.3K	¥1,900	-8.4%	¥287M ($1.9M)
2025-08-22	BUY	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	693.2K	¥1,900	-8.4%	¥62M ($401K)
2025-07-23	BUY	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	660.9K	¥1,810	-3.8%	¥1.2B ($7.7M)
2025-07-23	BUY	Market Buy	SMBC日興証券株式会社 SMBC Nikko Securities Inc.	other	300.4K	¥1,810	-3.8%	¥544M ($3.5M)
2025-02-07	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	641.7K	¥2,137	+18.5%	¥67M ($429K)
2025-02-07	SELL	Market Buy	SMBC日興証券株式会社 SMBC Nikko Securities Inc.	other	14.7K	¥2,137	+18.5%	¥293M ($1.9M)
2024-12-03	BUY	unknown	株式会社アンビシャス Ambitious Co., Ltd.	other	2.3M	¥1,768	-	-
2024-12-03	BUY	Market Buy	中井清和 NAKAI KIYOKAZU	activist	46.1K	¥1,768	-1.5%	¥999M ($6.4M)
2024-12-03	BUY	unknown	中井清和 Kiyokazu Nakai	activist	46.1K	¥1,768	-1.5%	¥1.1B ($7.1M)
2024-12-03	BUY	unknown	中井大志 Taishi Nakai	activist	439.8K	¥1,768	-1.5%	¥778M ($5.0M)
2024-12-03	BUY	unknown	中井大志 Taishi Nakai	activist	439.8K	¥1,768	-1.5%	¥778M ($5.0M)
2024-12-03	BUY	unknown	株式会社アンビシャス Ambitious Co., Ltd.	other	2.3M	¥1,768	-1.5%	-
2024-12-03	BUY	unknown	株式会社アンビシャス Ambitious Co., Ltd.	other	2.3M	¥1,768	-1.5%	-
2024-11-18	BUY	Market Buy	三菱UFJ信託銀行株式会社 Mitsubishi UFJ Financial Group Inc.	passive	428.7K	¥1,691	+3.0%	¥3M ($17K)
2024-11-18	BUY	Market Buy	三菱UFJアセットマネジメント株式会社 Mitsubishi UFJ Financial Group Inc.	passive	49.0K	¥1,691	-	-
2024-11-18	SELL	Market Buy	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	99.6K	¥1,691	-3.0%	¥408M ($2.6M)
2024-10-07	BUY	Market Buy	三菱UFJ信託銀行株式会社 Mitsubishi UFJ Financial Group Inc.	passive	428.2K	¥1,760	-1.1%	¥754M ($4.9M)
2024-10-07	BUY	Market Buy	三菱UFJアセットマネジメント株式会社 Mitsubishi UFJ Financial Group Inc.	passive	48.1K	¥1,760	-1.1%	¥85M ($546K)
2024-10-07	BUY	Market Buy	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	340.7K	¥1,760	-1.1%	¥600M ($3.9M)
2023-11-22	SELL	unknown	SMBC日興証券株式会社 SMBC Nikko Securities Inc.	other	151.0K	¥1,952	+10.8%	¥574M ($3.7M)
2023-11-22	BUY	unknown	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	672.2K	¥1,952	-10.8%	¥49M ($314K)
2023-10-20	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	646.6K	¥1,705	-2.1%	¥273M ($1.8M)
2023-10-20	BUY	Market Buy	SMBC日興証券株式会社 SMBC Nikko Securities Inc.	other	445.4K	¥1,705	+2.1%	¥98M ($633K)
2023-09-07	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	807.4K	¥1,926	+9.6%	¥500M ($3.2M)
2023-09-07	SELL	Market Buy	SMBC日興証券株式会社 SMBC Nikko Securities Inc.	other	387.0K	¥1,926	+9.6%	¥9M ($58K)
2023-06-07	BUY	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	1.1M	¥1,823	-4.5%	¥312M ($2.0M)
2023-06-07	BUY	Market Buy	SMBC日興証券株式会社 SMBC Nikko Securities Inc.	other	392.5K	¥1,823	-4.5%	¥3M ($18K)
2023-04-21	BUY	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	896.9K	¥1,684	+3.4%	¥351M ($2.3M)
2023-04-21	BUY	Market Buy	SMBC日興証券株式会社 SMBC Nikko Securities Inc.	other	390.4K	¥1,684	+3.4%	¥5M ($34K)
2022-12-23	BUY	unknown	中井清和 Kiyokazu Nakai	activist	40.0K	¥1,361	-	-
2022-12-23	BUY	unknown	中井清和 Kiyokazu Nakai	activist	40.0K	¥1,361	-	-
2022-12-23	SELL	unknown	中井洋子 Yoko Nakai	activist	0	¥1,361	-27.9%	¥434M ($2.8M)
2022-12-23	BUY	unknown	株式会社アンビシャス Ambitious Co., Ltd.	activist	2.3M	¥1,361	+27.9%	¥434M ($2.8M)
2022-12-23	SELL	unknown	中井洋子 Yoko Nakai	activist	0	¥1,361	-27.9%	¥434M ($2.8M)
2022-12-23	BUY	unknown	株式会社アンビシャス Ambitious Co., Ltd.	activist	2.3M	¥1,361	+27.9%	¥434M ($2.8M)
2022-11-08	BUY	Market Buy	SMBC日興証券株式会社 SMBC Nikko Securities Inc.	other	388.1K	¥1,512	+15.2%	¥148M ($956K)
2022-11-08	BUY	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	688.4K	¥1,512	+15.2%	¥132M ($850K)
2022-07-13	SELL	unknown	中井清和 Kiyokazu Nakai	activist	40.0K	¥975	-78.6%	¥399M ($2.6M)
2022-07-13	SELL	unknown	中井清和 Kiyokazu Nakai	activist	40.0K	¥975	-78.6%	¥399M ($2.6M)
2022-07-13	SELL	unknown	中井清和 Kiyokazu Nakai	activist	40.0K	¥975	-78.6%	¥399M ($2.6M)
2022-07-13	SELL	unknown	中井清和 Kiyokazu Nakai	activist	40.0K	¥975	-78.6%	¥399M ($2.6M)
2022-07-13	BUY	unknown	株式会社アンビシャス Ambitious Co., Ltd.	unknown	1.9M	¥975	+78.6%	¥405M ($2.6M)

Showing the 50 most recent of 74 filings.

Frequently asked questions

Who has been buying Gakujo Co., Ltd. stock?: 12 distinct investors have filed 41 disclosed large-shareholding filings in Gakujo Co., Ltd. (2301), most recently on 2025-12-05. 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 Gakujo Co., Ltd. have?: Gakujo Co., Ltd. has 41 buy-side and 21 sell-side disclosures on record, covering ¥16.3B ($104.9M) in total reported value, spanning 2021-08-03 to 2025-12-05.
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.