Who has been buying AI inside Inc. stock?

7 distinct investors have filed 12 disclosed large-shareholding filings in AI inside Inc. (4488), most recently on 2026-03-23. 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 AI inside Inc. have?

AI inside Inc. has 12 buy-side and 14 sell-side disclosures on record, covering ¥1.4B ($8.7M) in total reported value, spanning 2021-04-07 to 2026-03-23.

Where does StockDrifts get AI inside 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.

AI inside Inc. 4488

Company

AI inside株式会社AI inside Inc.

Investors

Buys

Total Value

¥1.4B ($8.7M)

Avg Return

-52.82%

Last Filing

2026-03-23

AI inside Inc. (4488) has 12 disclosed large-shareholding filings and 14 disclosed disposals on record, filed by 7 distinct investors. Together those filings cover ¥1.4B ($8.7M) in reported transaction value. The earliest filing StockDrifts holds for AI inside Inc. is dated 2021-04-07; the most recent is 2026-03-23. 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 -52.82%, 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
2026-03-23	SELL	unknown	楽天証券株式会社 Rakuten Securities Inc	other	243.8K	¥2,191	-9.4%	¥15M ($96K)
2025-07-07	SELL	unknown	アセットマネジメントOneインターナショナル Asset Management One International Ltd.	other	3.5K	¥3,305	+27.5%	¥8M ($51K)
2025-07-07	SELL	unknown	アセットマネジメントOne株式会社 Asset Management One Co., Ltd.	other	148.8K	¥3,305	+27.5%	¥156M ($1.0M)
2025-05-09	BUY	Market Buy	楽天証券株式会社 Rakuten Securities Inc	other	250.8K	¥3,085	-22.3%	¥17M ($111K)
2025-04-22	BUY	Market Buy	楽天証券株式会社 Rakuten Securities Inc	other	245.3K	¥2,888	-17.0%	¥76M ($492K)
2024-09-03	BUY	unknown	楽天証券株式会社 Rakuten Securities Inc	other	218.6K	¥4,250	-43.6%	¥929M ($6.0M)
2024-08-21	SELL	unknown	楽天証券株式会社 Rakuten Securities Inc	other	151.1K	¥3,860	+37.9%	¥190M ($1.2M)
2024-05-21	BUY	unknown	楽天証券株式会社 Rakuten Securities Inc	other	200.5K	¥5,160	-53.5%	¥1.0B ($6.7M)
2024-04-19	SELL	unknown	楽天証券株式会社 Rakuten Securities Inc	other	197.8K	¥6,120	+60.8%	¥24M ($158K)
2024-04-05	BUY	unknown	アセットマネジメントOneインターナショナル Asset Management One International Ltd.	other	5.9K	¥6,810	-64.8%	¥40M ($259K)
2024-04-05	BUY	unknown	アセットマネジメントOne株式会社 Asset Management One Co., Ltd.	other	195.8K	¥6,810	-64.8%	¥1.3B ($8.6M)
2024-04-03	SELL	unknown	楽天証券株式会社 Rakuten Securities Inc	other	202.1K	¥7,030	+65.9%	¥14M ($91K)
2024-03-19	SELL	unknown	楽天証券株式会社 Rakuten Securities Inc	other	203.9K	¥8,150	+70.6%	¥65M ($421K)
2023-08-16	SELL	unknown	楽天証券株式会社 Rakuten Securities Inc	other	212.1K	¥4,190	+42.8%	¥79M ($508K)
2023-08-01	SELL	unknown	楽天証券株式会社 Rakuten Securities Inc	other	230.6K	¥4,475	+46.4%	¥29M ($185K)
2023-07-20	BUY	Market Buy	楽天証券株式会社 Rakuten Securities Inc	other	237.2K	¥4,765	-49.7%	¥30M ($197K)
2023-04-04	BUY	unknown	楽天証券株式会社 Rakuten Securities Inc	other	230.7K	¥4,400	-45.5%	¥1.0B ($6.5M)
2022-12-05	SELL	unknown	楽天証券株式会社 Rakuten Securities Inc	other	193.3K	¥5,140	+53.4%	¥92M ($597K)
2022-11-08	BUY	unknown	楽天証券株式会社 Rakuten Securities Inc	other	211.4K	¥4,185	-42.7%	¥885M ($5.7M)
2021-12-13	SELL	Market Buy	アクサ生命保険株式会社 AXA Life Insurance Co., Ltd.	passive	136.4K	¥6,870	+65.1%	¥421M ($2.7M)
2021-09-22	SELL	unknown	UBS証券株式会社 UBS Securities Co., Ltd.	other	745	¥10,030	+76.1%	¥393M ($2.5M)
2021-09-22	BUY	unknown	ユービーエス・エイ・ジー(銀行) UBS AG	other	130.0K	¥10,030	-76.1%	¥1.3B ($8.3M)
2021-09-06	BUY	unknown	UBS証券株式会社 UBS Securities Co., Ltd.	other	1.1K	¥10,360	-76.9%	¥11M ($70K)
2021-09-06	BUY	unknown	ユービーエス・エイ・ジー(銀行) UBS AG	other	197.6K	¥10,360	-76.9%	¥2.0B ($13.2M)
2021-05-21	SELL	Market Buy	キャピタル・リサーチ・アンド・マネージメント・カンパニー(Capital Research and Management Company) Capital Research and Management Company	passive	0	¥16,110	+85.1%	¥3.5B ($22.4M)
2021-04-07	SELL	Market Buy	キャピタル・リサーチ・アンド・マネージメント・カンパニー(Capital Research and Management Company) Capital Research and Management Company	passive	215.2K	¥36,950	+93.5%	¥3.2B ($20.6M)

Frequently asked questions

Who has been buying AI inside Inc. stock?: 7 distinct investors have filed 12 disclosed large-shareholding filings in AI inside Inc. (4488), most recently on 2026-03-23. 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 AI inside Inc. have?: AI inside Inc. has 12 buy-side and 14 sell-side disclosures on record, covering ¥1.4B ($8.7M) in total reported value, spanning 2021-04-07 to 2026-03-23.
Where does StockDrifts get AI inside 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 AI inside Inc.. For how StockDrifts scores these disclosures, see the Japan insider signal tier research, or browse every Japanese stock we track.