Who has been buying EduLab, Inc. stock?

11 distinct investors have filed 13 disclosed large-shareholding filings in EduLab, Inc. (4427), most recently on 2025-06-30. 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 EduLab, Inc. have?

EduLab, Inc. has 13 buy-side and 7 sell-side disclosures on record, covering ¥4.2B ($27.0M) in total reported value, spanning 2021-03-17 to 2025-06-30.

Where does StockDrifts get EduLab, Inc. insider data?

From EDINET large-shareholding (5%+) reports — the official filing system run by the Financial Services Agency (Japan). StockDrifts parses each disclosure and matches it to daily price history; the original filings remain available directly from EDINET.

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.

EduLab, Inc. 4427

Company

株式会社EduLabEduLab, Inc.

Investors

Buys

Total Value

¥4.2B ($27.0M)

Avg Return

-70.47%

Last Filing

2025-06-30

EduLab, Inc. (4427) has 13 disclosed large-shareholding filings and 7 disclosed disposals on record, filed by 11 distinct investors. Together those filings cover ¥4.2B ($27.0M) in reported transaction value. The earliest filing StockDrifts holds for EduLab, Inc. is dated 2021-03-17; the most recent is 2025-06-30. All of it is parsed from EDINET large-shareholding (5%+) reports, the official disclosure system operated by the Financial Services Agency (Japan). Across these filings the average return since disclosure is -70.47%, 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
2025-06-30	BUY	unknown	株式会社旺文社キャピタル Obunsha Capital Co., Ltd.	other	268.4K	¥393	-41.2%	¥105M ($681K)
2025-06-30	BUY	unknown	株式会社旺文社キャピタル Obunsha Capital Co., Ltd.	other	268.4K	¥393	-41.2%	¥105M ($681K)
2025-06-30	SELL	unknown	株式会社旺文社 Obunsha Co., Ltd.	strategic	527.8K	¥393	+41.2%	¥10M ($65K)
2025-06-30	BUY	unknown	株式会社旺文社 Obunsha Co., Ltd.	strategic	527.8K	¥393	-41.2%	¥10M ($65K)
2022-08-05	SELL	Market Buy	松田浩史 Matsuda Hiroshi	passive	482.6K	¥820	+71.8%	¥521M ($3.4M)
2022-08-05	SELL	Market Buy	髙村淳一 Takamura Junichi	passive	484.8K	¥820	+71.8%	¥1.6B ($10.5M)
2022-08-05	SELL	Market Buy	林規生 Hayashi Norio	passive	238.3K	¥820	+71.8%	¥241M ($1.6M)
2022-08-03	BUY	unknown	株式会社ZE1 ZE1 Co., Ltd.	strategic	3.0M	¥756	-69.4%	¥2.3B ($14.7M)
2022-08-03	BUY	unknown	株式会社増進会ホールディングス Zoshinkai Holdings Inc.	activist	311.2K	¥756	-69.4%	¥235M ($1.5M)
2022-03-23	BUY	unknown	UBS証券株式会社 UBS Securities Co., Ltd.	other	130.5K	¥776	-70.2%	¥8M ($50K)
2022-03-23	BUY	unknown	ユービーエス・エイ・ジー(銀行) UBS AG	other	248.9K	¥776	-70.2%	¥190M ($1.2M)
2022-03-04	BUY	unknown	UBS証券株式会社 UBS Securities Co., Ltd.	other	120.1K	¥899	-74.3%	¥41M ($268K)
2022-03-04	SELL	unknown	ユービーエス・エイ・ジー(銀行) UBS AG	other	444.4K	¥899	+74.3%	¥16M ($105K)
2022-02-22	BUY	Market Buy	UBS証券株式会社 UBS Securities Co., Ltd.	other	74.7K	¥560	-58.8%	¥42M ($268K)
2022-02-22	SELL	Market Buy	UBSファンド・マネジメント(ルクセンブルグ)エス・エイ UBS Fund Management (Luxembourg) S.A.	other	0	¥560	+58.8%	¥48M ($308K)
2022-02-22	BUY	Market Buy	ユービーエス・エイ・ジー(銀行) UBS AG	other	462.6K	¥560	-58.8%	¥16M ($105K)
2021-10-21	BUY	Market Buy	UBSファンド・マネジメント(ルクセンブルグ)エス・エイ UBS Fund Management (Luxembourg) S.A.	other	85.7K	¥1,660	-86.1%	¥142M ($918K)
2021-10-21	BUY	Market Buy	ユービーエス・エイ・ジー(銀行) UBS AG	other	433.3K	¥1,660	-86.1%	¥10M ($64K)
2021-10-06	BUY	unknown	UBSファンド・マネジメント(ルクセンブルグ)エス・エイ UBS Fund Management (Luxembourg) S.A.	other	85.7K	¥2,247	-89.7%	¥193M ($1.2M)
2021-10-06	BUY	unknown	ユービーエス・エイ・ジー(銀行) UBS AG	other	427.1K	¥2,247	-89.7%	¥960M ($6.2M)
2021-08-26	SELL	Market Buy	カバウター・マネージメント・エルエルシー (Kabouter Management, LLC) Kabouter Management, LLC	passive	481.9K	¥2,986	+92.3%	¥368M ($2.4M)
2021-03-17	BUY	Market Buy	カバウター・マネージメント・エルエルシー (Kabouter Management, LLC) Kabouter Management, LLC	passive	600.1K	¥7,650	-97.0%	¥776M ($5.0M)

Frequently asked questions

Who has been buying EduLab, Inc. stock?: 11 distinct investors have filed 13 disclosed large-shareholding filings in EduLab, Inc. (4427), most recently on 2025-06-30. 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 EduLab, Inc. have?: EduLab, Inc. has 13 buy-side and 7 sell-side disclosures on record, covering ¥4.2B ($27.0M) in total reported value, spanning 2021-03-17 to 2025-06-30.
Where does StockDrifts get EduLab, Inc. insider data?: From EDINET large-shareholding (5%+) reports — the official filing system run by the Financial Services Agency (Japan). StockDrifts parses each disclosure and matches it to daily price history; the original filings remain available directly from EDINET.
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.

Source filings

Every trade listed above is disclosed in EDINET large-shareholding (5%+) reports, filed with the Financial Services Agency (Japan). View the original EDINET filings for EduLab, Inc.. For how StockDrifts scores these disclosures, see the Japan insider signal tier research, or browse every Japanese stock we track.