Who has been buying Advanex Inc. stock?

17 distinct investors have filed 89 disclosed large-shareholding filings in Advanex Inc. (5998), most recently on 2026-05-08. 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 Advanex Inc. have?

Advanex Inc. has 89 buy-side and 27 sell-side disclosures on record, covering ¥8.1B ($52.0M) in total reported value, spanning 2021-06-17 to 2026-05-08.

Where does StockDrifts get Advanex 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.

Advanex Inc. 5998

Company

株式会社アドバネクスAdvanex Inc.

Investors

Buys

Total Value

¥8.1B ($52.0M)

Avg Return

+38.39%

Last Filing

2026-05-08

Advanex Inc. (5998) has 89 disclosed large-shareholding filings and 27 disclosed disposals on record, filed by 17 distinct investors. Together those filings cover ¥8.1B ($52.0M) in reported transaction value. The earliest filing StockDrifts holds for Advanex Inc. is dated 2021-06-17; the most recent is 2026-05-08. 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 +38.39%, 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
2026-05-08	BUY	Market Buy	三菱UFJアセットマネジメント株式会社	passive	45.0K	¥1,984	+51.7%	¥89M ($576K)
2026-05-08	BUY	negotiated	株式会社三菱UFJ銀行	strategic	165.8K	¥1,984	+51.7%	¥329M ($2.1M)
2025-12-02	BUY	Market Buy	AAA株式会社	unknown	446.2K	¥1,445	-22.8%	¥792M ($5.1M)
2025-12-02	BUY	Market Buy	スマイル株式会社	other	94.1K	¥1,445	-22.8%	¥167M ($1.1M)
2025-12-02	BUY	Market Buy	アーク株式会社	other	205.0K	¥1,445	-22.8%	¥364M ($2.3M)
2025-12-02	BUY	Market Buy	エース株式会社	other	142.1K	¥1,445	-22.8%	¥252M ($1.6M)
2025-12-02	BUY	Market Buy	スマート有限会社	other	417.5K	¥1,445	+22.8%	¥741M ($4.8M)
2025-12-02	BUY	Market Buy	ASADA株式会社	other	331.6K	¥1,445	-22.8%	¥588M ($3.8M)
2025-12-02	BUY	Market Buy	株式会社アサダ	other	130.9K	¥1,445	-22.8%	¥232M ($1.5M)
2025-12-02	BUY	Market Buy	ART株式会社	other	200.0K	¥1,445	-22.8%	¥355M ($2.3M)
2025-12-02	BUY	Market Buy	AAA株式会社	other	446.2K	¥1,445	-22.8%	¥792M ($5.1M)
2025-11-21	BUY	Market Buy	AAA株式会社 AAA	unknown	446.2K	¥1,327	+33.7%	¥592M ($3.8M)
2025-11-21	BUY	Market Buy	スマイル株式会社 Smile Co., Ltd.	other	94.1K	¥1,327	+33.7%	¥125M ($806K)
2025-11-21	BUY	Market Buy	アーク株式会社 Ark Co., Ltd.	other	205.0K	¥1,327	+33.7%	¥272M ($1.8M)
2025-11-21	BUY	Market Buy	エース株式会社 Ace Co., Ltd.	other	142.1K	¥1,327	+33.7%	¥189M ($1.2M)
2025-11-21	BUY	Market Buy	スマート有限会社 Smart Co., Ltd.	other	371.9K	¥1,327	+33.7%	¥60M ($388K)
2025-11-21	BUY	Market Buy	ASADA株式会社 ASADA Co., Ltd.	other	331.6K	¥1,327	+33.7%	¥7M ($43K)
2025-11-21	BUY	Market Buy	株式会社アサダ Asada Co., Ltd.	other	130.9K	¥1,327	+33.7%	¥174M ($1.1M)
2025-11-21	BUY	Market Buy	ART株式会社 ART Co., Ltd.	other	200.0K	¥1,327	+33.7%	¥265M ($1.7M)
2025-11-21	BUY	Market Buy	AAA株式会社 AAA	other	446.2K	¥1,327	+33.7%	¥592M ($3.8M)
2025-11-20	BUY	Market Buy	AAA株式会社 AAA	unknown	446.2K	¥1,182	+50.1%	¥527M ($3.4M)
2025-11-20	BUY	Market Buy	スマイル株式会社 Smile Co., Ltd.	other	94.1K	¥1,182	+50.1%	¥111M ($718K)
2025-11-20	BUY	Market Buy	アーク株式会社 Ark Co., Ltd.	other	205.0K	¥1,182	+50.1%	¥242M ($1.6M)
2025-11-20	BUY	Market Buy	エース株式会社 Ace Co., Ltd.	other	142.1K	¥1,182	+50.1%	¥168M ($1.1M)
2025-11-20	BUY	Market Buy	スマート有限会社 Smart Co., Ltd.	other	326.6K	¥1,182	+50.1%	¥27M ($171K)
2025-11-20	BUY	Market Buy	ASADA株式会社 ASADA Co., Ltd.	other	326.6K	¥1,182	+50.1%	¥32M ($206K)
2025-11-20	BUY	Market Buy	株式会社アサダ Asada Co., Ltd.	other	130.9K	¥1,182	+50.1%	¥155M ($998K)
2025-11-20	BUY	Market Buy	ART株式会社 ART Co., Ltd.	other	200.0K	¥1,182	+50.1%	¥236M ($1.5M)
2025-11-20	BUY	Market Buy	AAA株式会社 AAA	other	446.2K	¥1,182	+50.1%	¥527M ($3.4M)
2025-10-14	SELL	unknown	加藤雄一ホールディングス株式会社 Yuichi Kato Holdings Co., Ltd.	other	123.9K	¥1,460	-21.5%	¥61M ($395K)
2025-10-14	BUY	unknown	加藤祐子 Yuko Kato	other	150	¥1,460	+21.5%	¥219K ($1K)
2025-10-14	BUY	unknown	加藤雄一 Yuichi Kato	other	58.1K	¥1,460	+21.5%	¥85M ($547K)
2025-09-30	SELL	unknown	加藤雄一ホールディングス株式会社 Yuichi Kato Holdings Co., Ltd.	other	165.9K	¥1,585	-11.9%	¥60M ($386K)
2025-09-30	SELL	unknown	加藤祐子 Yuko Kato	other	150	¥1,585	-11.9%	¥21M ($136K)
2025-09-30	SELL	unknown	加藤雄一ホールディングス株式会社 Yuichi Kato Holdings Co., Ltd.	other	165.9K	¥1,585	-11.9%	¥60M ($386K)
2025-09-30	SELL	unknown	加藤祐子 Yuko Kato	other	150	¥1,585	-11.9%	¥21M ($136K)
2025-09-30	BUY	unknown	加藤雄一 Yuichi Kato	other	58.1K	¥1,585	+11.9%	¥92M ($594K)
2025-09-30	BUY	unknown	加藤雄一 Yuichi Kato	other	58.1K	¥1,585	+11.9%	¥32M ($208K)
2025-09-10	BUY	unknown	加藤祐子 Yuko Kato	other	13.3K	¥1,555	+14.1%	¥21M ($134K)
2025-09-10	SELL	unknown	加藤雄一ホールディングス株式会社 Yuichi Kato Holdings Co., Ltd.	other	203.7K	¥1,555	-14.1%	¥103M ($667K)
2025-09-10	BUY	unknown	加藤雄一ホールディングス株式会社 Yuichi Kato Holdings Co., Ltd.	other	203.7K	¥1,555	+14.1%	¥103M ($667K)
2025-09-10	BUY	unknown	加藤祐子 Yuko Kato	other	13.3K	¥1,555	+14.1%	¥21M ($134K)
2025-09-10	BUY	unknown	加藤雄一 Yuichi Kato	other	58.1K	¥1,555	+14.1%	¥5.8B ($37.3M)
2025-09-10	BUY	unknown	加藤雄一 Yuichi Kato	other	58.1K	¥1,555	+14.1%	¥32M ($204K)
2024-06-03	BUY	unknown	スマイル株式会社 Smile Co., Ltd.	other	94.1K	¥1,061	+67.2%	¥100M ($644K)
2024-06-03	BUY	unknown	アーク株式会社 Ark Co., Ltd.	other	205.0K	¥1,061	+67.2%	¥218M ($1.4M)
2024-06-03	BUY	unknown	エース株式会社 Ace Co., Ltd.	other	142.1K	¥1,061	+67.2%	¥151M ($973K)
2024-06-03	BUY	unknown	スマート有限会社 Smart Co., Ltd.	other	304.2K	¥1,061	+67.2%	¥4M ($28K)
2024-06-03	BUY	unknown	ASADA株式会社 ASADA Co., Ltd.	other	299.6K	¥1,061	+67.2%	¥1M ($9K)
2024-06-03	BUY	unknown	株式会社アサダ Asada Co., Ltd.	other	130.9K	¥1,061	+67.2%	¥39M ($253K)

Showing the 50 most recent of 200 filings.

Frequently asked questions

Who has been buying Advanex Inc. stock?: 17 distinct investors have filed 89 disclosed large-shareholding filings in Advanex Inc. (5998), most recently on 2026-05-08. 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 Advanex Inc. have?: Advanex Inc. has 89 buy-side and 27 sell-side disclosures on record, covering ¥8.1B ($52.0M) in total reported value, spanning 2021-06-17 to 2026-05-08.
Where does StockDrifts get Advanex 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 Advanex Inc.. For how StockDrifts scores these disclosures, see the Japan insider signal tier research, or browse every Japanese stock we track.