Who has been buying Aidemy Inc. stock?

7 distinct investors have filed 9 disclosed large-shareholding filings in Aidemy Inc. (5577), most recently on 2025-10-27. 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 Aidemy Inc. have?

Aidemy Inc. has 9 buy-side and 9 sell-side disclosures on record, covering ¥14.3B ($92.4M) in total reported value, spanning 2023-06-29 to 2025-10-27.

Where does StockDrifts get Aidemy 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.

Aidemy Inc. 5577

Company

株式会社アイデミーAidemy Inc.

Investors

Buys

Total Value

¥14.3B ($92.4M)

Avg Return

-17.89%

Last Filing

2025-10-27

Aidemy Inc. (5577) has 9 disclosed large-shareholding filings and 9 disclosed disposals on record, filed by 7 distinct investors. Together those filings cover ¥14.3B ($92.4M) in reported transaction value. The earliest filing StockDrifts holds for Aidemy Inc. is dated 2023-06-29; the most recent is 2025-10-27. 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 -17.89%, 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
2025-10-27	SELL	subscription	アクセンチュア株式会社 Accenture Japan Ltd	activist	4.1M	¥1,441	+0.0%	¥5.4B ($35.1M)
2025-10-07	SELL	unknown	野村證券株式会社 Nomura Securities Co.,Ltd.	unknown	0	¥1,439	-0.1%	¥116M ($748K)
2025-10-07	SELL	unknown	ノムラインターナショナルピーエルシー NOMURA INTERNATIONAL PLC	other	29.5K	¥1,439	-0.1%	¥233M ($1.5M)
2025-10-06	SELL	unknown	石川聡彦 Ishikawa Akihiko	unknown	0	¥1,438	-0.2%	¥2.6B ($16.9M)
2025-10-02	BUY	unknown	楽天証券株式会社 Rakuten Securities Inc	other	3.3K	¥1,438	+0.2%	¥13M ($82K)
2025-09-30	BUY	subscription	アクセンチュア株式会社 Accenture Japan Ltd	activist	3.8M	¥1,436	+0.3%	¥5.5B ($35.6M)
2025-09-30	BUY	subscription	アクセンチュア株式会社 Accenture Japan Ltd	activist	3.8M	¥1,436	+0.3%	¥5.5B ($35.6M)
2025-09-18	BUY	unknown	ノムラインターナショナルピーエルシー NOMURA INTERNATIONAL PLC	other	189.8K	¥1,447	-0.4%	¥275M ($1.8M)
2025-09-18	BUY	Market Buy	楽天証券株式会社 Rakuten Securities Inc	other	318.4K	¥1,447	-0.4%	¥58M ($373K)
2025-09-18	BUY	unknown	野村證券株式会社 Nomura Securities Co.,Ltd.	other	80.0K	¥1,447	-0.4%	¥116M ($747K)
2025-09-03	BUY	unknown	楽天証券株式会社 Rakuten Securities Inc	other	278.6K	¥1,444	-0.2%	¥402M ($2.6M)
2025-08-18	BUY	unknown	石川聡彦 Ishikawa Akihiko	activist	1.8M	¥1,444	-0.2%	¥2.6B ($16.7M)
2025-08-15	SELL	unknown	石川聡彦 Ishikawa Akihiko	activist	1.8M	¥1,381	-4.3%	¥18M ($118K)
2024-01-26	SELL	subscription	石川聡彦 Akihiko Ishikawa	activist	1.8M	¥2,166	+33.5%	¥146M ($943K)
2024-01-26	BUY	subscription	石川聡彦 Ishikawa Akihiko	activist	1.8M	¥2,166	-33.5%	¥3.9B ($25.1M)
2024-01-26	BUY	unknown	石川聡彦 Ishikawa Akihiko	activist	1.8M	¥2,166	-33.5%	¥3.9B ($25.1M)
2023-07-05	SELL	Market Buy	株式会社東京大学エッジキャピタルパートナーズ The University of Tokyo Edge Capital Partners Co., Ltd.	passive	151.0K	¥3,520	+59.1%	¥520M ($3.4M)
2023-07-04	SELL	Market Buy	株式会社東京大学エッジキャピタルパートナーズ The University of Tokyo Edge Capital Partners Co., Ltd.	passive	298.6K	¥3,640	+60.4%	¥764M ($4.9M)
2023-07-03	SELL	Market Buy	株式会社東京大学エッジキャピタルパートナーズ The University of Tokyo Edge Capital Partners Co., Ltd.	passive	508.6K	¥3,400	+57.6%	¥391M ($2.5M)
2023-06-29	BUY	subscription	石川聡彦 Akihiko Ishikawa	activist	1.9M	¥3,090	-53.4%	¥5.7B ($37.1M)
2023-06-29	BUY	acquisition	株式会社東京大学エッジキャピタルパートナーズ The University of Tokyo Edge Capital Partners Co., Ltd.	passive	623.9K	¥3,090	-53.4%	¥1.9B ($12.4M)
2023-06-29	BUY	subscription	白井元 Hajime Shirai	activist	320.0K	¥3,090	-53.4%	¥989M ($6.4M)
2023-06-29	BUY	Market Buy	株式会社東京大学エッジキャピタルパートナーズ The University of Tokyo Edge Capital Partners Co., Ltd.	passive	623.9K	¥3,090	-53.4%	¥1.9B ($12.4M)

Frequently asked questions

Who has been buying Aidemy Inc. stock?: 7 distinct investors have filed 9 disclosed large-shareholding filings in Aidemy Inc. (5577), most recently on 2025-10-27. 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 Aidemy Inc. have?: Aidemy Inc. has 9 buy-side and 9 sell-side disclosures on record, covering ¥14.3B ($92.4M) in total reported value, spanning 2023-06-29 to 2025-10-27.
Where does StockDrifts get Aidemy 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 Aidemy Inc.. For how StockDrifts scores these disclosures, see the Japan insider signal tier research, or browse every Japanese stock we track.