Who has been buying Ain Holdings Inc. stock?

14 distinct investors have filed 24 disclosed large-shareholding filings in Ain Holdings Inc. (9627), most recently on 2026-05-12. 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 Ain Holdings Inc. have?

Ain Holdings Inc. has 24 buy-side and 40 sell-side disclosures on record, covering ¥19.8B ($127.9M) in total reported value, spanning 2021-04-05 to 2026-05-12.

Where does StockDrifts get Ain Holdings 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.

Ain Holdings Inc. 9627

Company

株式会社アインホールディングスAin Holdings Inc.

Investors

Buys

Total Value

¥19.8B ($127.9M)

Avg Return

-0.28%

Last Filing

2026-05-12

Ain Holdings Inc. (9627) has 24 disclosed large-shareholding filings and 40 disclosed disposals on record, filed by 14 distinct investors. Together those filings cover ¥19.8B ($127.9M) in reported transaction value. The earliest filing StockDrifts holds for Ain Holdings Inc. is dated 2021-04-05; the most recent is 2026-05-12. 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 -0.28%, 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
2026-08-14	BUY	Market Buy	オアシスマネジメントカンパニーリミテッド(Oasis Management Company Ltd.) Oasis Management Company Ltd.	passive	7.4M	¥6,178	+0.0%	¥2.5B ($16.0M)
2026-08-05	BUY	Market Buy	オアシスマネジメントカンパニーリミテッド(Oasis Management Company Ltd.) Oasis Management Company Ltd.	passive	7.0M	¥5,685	+8.7%	¥2.1B ($13.6M)
2026-07-28	BUY	Market Buy	オアシスマネジメントカンパニーリミテッド(Oasis Management Company Ltd.) Oasis Management Company Ltd.	passive	6.6M	¥6,013	+2.7%	¥2.2B ($13.9M)
2026-06-29	BUY	Market Buy	オアシスマネジメントカンパニーリミテッド(Oasis Management Company Ltd.) Oasis Management Company Ltd.	passive	6.3M	¥5,474	+7.9%	¥2.1B ($13.3M)
2026-06-22	BUY	unknown	野村アセットマネジメント株式会社	other	760.4K	¥5,364	+8.5%	¥4.1B ($26.3M)
2026-06-22	SELL	unknown	ノムラインターナショナルピーエルシー NOMURA INTERNATIONAL PLC	other	-53.2K	¥5,364	-	-
2026-06-22	BUY	Market Buy	野村證券株式会社	other	1.0M	¥5,364	+8.5%	¥627M ($4.0M)
2026-06-03	BUY	unknown	野村アセットマネジメント株式会社	other	761.1K	¥5,763	-3.1%	¥4.4B ($28.3M)
2026-06-03	SELL	unknown	ノムラインターナショナルピーエルシー NOMURA INTERNATIONAL PLC	other	113.7K	¥5,763	+3.1%	¥245M ($1.6M)
2026-06-03	BUY	Market Buy	野村證券株式会社	other	924.0K	¥5,763	-3.1%	¥41M ($263K)
2026-05-21	BUY	Market Buy	野村アセットマネジメント株式会社	other	761.9K	¥5,772	-1.7%	¥20M ($132K)
2026-05-21	BUY	Market Buy	ノムラインターナショナルピーエルシー NOMURA INTERNATIONAL PLC	other	156.2K	¥5,772	-1.7%	¥102M ($660K)
2026-05-21	BUY	Market Buy	野村證券株式会社	other	916.5K	¥5,772	-1.7%	¥82M ($528K)
2026-05-12	BUY	unknown	野村アセットマネジメント株式会社	other	756.5K	¥5,509	+4.9%	¥4.2B ($26.9M)
2026-05-12	BUY	unknown	ノムラインターナショナルピーエルシー NOMURA INTERNATIONAL PLC	other	137.8K	¥5,509	+4.9%	¥759M ($4.9M)
2026-05-12	BUY	unknown	野村證券株式会社	other	903.1K	¥5,509	+4.9%	¥5.0B ($32.1M)
2026-05-08	BUY	Market Buy	オアシスマネジメントカンパニーリミテッド(Oasis Management Company Ltd.) Oasis Management Company Ltd.	activist	5.9M	¥5,511	+4.9%	¥3.5B ($22.5M)
2026-02-24	SELL	unknown	スプラウスグローブ・インベストメント・マネジメント・リミテッド(Sprucegrove Investment Management Ltd.) Sprucegrove Investment Management Ltd.	other	2.1M	¥6,143	+1.5%	¥2.3B ($14.9M)
2025-09-19	SELL	unknown	スプラウスグローブ・インベストメント・マネジメント・リミテッド(Sprucegrove Investment Management Ltd.) Sprucegrove Investment Management Ltd.	other	2.5M	¥6,960	+13.1%	¥2.6B ($17.0M)
2025-06-02	SELL	unknown	スプラウスグローブ・インベストメント・マネジメント・リミテッド(Sprucegrove Investment Management Ltd.) Sprucegrove Investment Management Ltd.	other	2.8M	¥5,630	-7.5%	¥2.1B ($13.4M)
2025-04-24	SELL	unknown	スプラウスグローブ・インベストメント・マネジメント・リミテッド(Sprucegrove Investment Management Ltd.) Sprucegrove Investment Management Ltd.	other	3.2M	¥5,332	-13.5%	¥2.1B ($13.4M)
2025-01-15	SELL	unknown	スプラウスグローブ・インベストメント・マネジメント・リミテッド(Sprucegrove Investment Management Ltd.) Sprucegrove Investment Management Ltd.	other	3.6M	¥4,343	-39.3%	¥2.0B ($12.9M)
2024-11-01	SELL	unknown	スプラウスグローブ・インベストメント・マネジメント・リミテッド(Sprucegrove Investment Management Ltd.) Sprucegrove Investment Management Ltd.	other	4.1M	¥4,900	-23.5%	¥2.0B ($12.8M)
2024-05-01	BUY	Market Buy	オアシスマネジメントカンパニーリミテッド(Oasis Management Company Ltd.) Oasis Management Company Ltd.	activist	5.3M	¥6,125	-1.2%	¥11.5B ($74.1M)
2024-04-22	BUY	unknown	ノムラセキュリテーズインターナショナル NOMURA SECURITIES INTERNATIONAL,Inc.	other	0	¥5,925	+2.1%	-
2024-04-22	BUY	unknown	野村アセットマネジメント株式会社 Nomura Asset Management Co., Ltd.	other	905.0K	¥5,925	+2.1%	¥5.4B ($34.6M)
2024-04-22	SELL	unknown	ノムラインターナショナルピーエルシー NOMURA INTERNATIONAL PLC	other	794.9K	¥5,925	-2.1%	¥735M ($4.7M)
2024-04-05	BUY	unknown	ノムラインターナショナルピーエルシー NOMURA INTERNATIONAL PLC	other	917.4K	¥5,633	+7.4%	¥5.2B ($33.3M)
2024-04-05	BUY	unknown	野村アセットマネジメント株式会社 Nomura Asset Management Co., Ltd.	other	901.7K	¥5,633	+7.4%	¥5.1B ($32.8M)
2024-04-05	BUY	unknown	ノムラセキュリテーズインターナショナル NOMURA SECURITIES INTERNATIONAL,Inc.	other	0	¥5,633	+7.4%	-
2024-03-06	BUY	unknown	オアシスマネジメントカンパニーリミテッド(Oasis Management Company Ltd.) Oasis Management Company Ltd.	activist	3.4M	¥5,246	+15.3%	¥17.8B ($115.1M)
2023-06-16	BUY	Market Buy	スプラウスグローブ・インベストメント・マネジメント・リミテッド(Sprucegrove Investment Management Ltd.) Sprucegrove Investment Management Ltd.	other	4.5M	¥5,050	+19.8%	¥2.0B ($12.8M)
2023-03-09	BUY	Market Buy	スプラウスグローブ・インベストメント・マネジメント・リミテッド(Sprucegrove Investment Management Ltd.) Sprucegrove Investment Management Ltd.	other	4.1M	¥5,810	+4.2%	¥2.4B ($15.4M)
2023-01-23	SELL	unknown	スプラウスグローブ・インベストメント・マネジメント・リミテッド(Sprucegrove Investment Management Ltd.) Sprucegrove Investment Management Ltd.	other	3.6M	¥5,750	-5.2%	¥2.1B ($13.7M)
2022-11-14	SELL	unknown	大谷喜一 Kiichi Otani	other	3.2M	¥6,500	+6.9%	¥2.3B ($15.2M)
2022-09-21	SELL	unknown	スプラウスグローブ・インベストメント・マネジメント・リミテッド(Sprucegrove Investment Management Ltd.) Sprucegrove Investment Management Ltd.	other	4.0M	¥6,320	+4.3%	¥2.4B ($15.7M)
2022-02-22	BUY	Market Buy	スプラウスグローブ・インベストメント・マネジメント・リミテッド(Sprucegrove Investment Management Ltd.) Sprucegrove Investment Management Ltd.	other	4.4M	¥6,400	-5.5%	¥2.4B ($15.4M)
2022-02-07	SELL	negotiated	ファースト・センティア・インベスターズ(オーストラリア)アールイー・リミテッドRE Ltd) First Sentier Investors (Australia	passive	63.8K	¥5,598.693	+0.4%	¥357M ($2.3M)
2022-02-07	SELL	negotiated	ファースト・センティア・インベスターズ(オーストラリア)アイエム・リミテッドIM Ltd) First Sentier Investors (Australia	passive	520.2K	¥5,598.693	+0.4%	¥2.9B ($18.8M)
2022-02-07	SELL	negotiated	ファースト・センティア・インベスターズ(オーストラリア)アールイー・リミテッドRE Ltd) First Sentier Investors (Australia	passive	63.8K	¥5,970	-1.4%	¥169M ($1.1M)
2022-02-07	SELL	negotiated	ファースト・センティア・インベスターズ(オーストラリア)アイエム・リミテッドIM Ltd) First Sentier Investors (Australia	passive	520.2K	¥5,970	-1.4%	¥1.3B ($8.2M)
2022-02-07	BUY	negotiated	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	272.1K	¥5,970	+1.4%	¥465M ($3.0M)
2022-02-07	SELL	negotiated	三菱UFJ国際投信株式会社 Mitsubishi UFJ Financial Group Inc.	passive	103.8K	¥5,970	-1.4%	¥148M ($955K)
2022-02-07	SELL	negotiated	三菱UFJ信託銀行株式会社 Mitsubishi UFJ Financial Group Inc.	passive	727.9K	¥5,970	-1.4%	¥1.2B ($7.5M)
2022-02-07	BUY	negotiated	株式会社三菱UFJ銀行 Mitsubishi UFJ Financial Group Inc.	strategic	60.0K	¥5,970	+1.4%	¥358M ($2.3M)
2022-02-07	SELL	negotiated	ファースト・センティア・インベスターズ(オーストラリア)アールイー・リミテッドRE Ltd) First Sentier Investors (Australia	passive	63.8K	¥5,598.693	+0.4%	¥357M ($2.3M)
2022-02-07	SELL	negotiated	ファースト・センティア・インベスターズ(オーストラリア)アイエム・リミテッドIM Ltd) First Sentier Investors (Australia	passive	520.2K	¥5,598.693	+0.4%	¥2.9B ($18.8M)
2022-02-07	SELL	negotiated	ファースト・センティア・インベスターズ(オーストラリア)アールイー・リミテッドRE Ltd) First Sentier Investors (Australia	passive	63.8K	¥5,970	-1.4%	¥169M ($1.1M)
2022-02-07	SELL	negotiated	ファースト・センティア・インベスターズ(オーストラリア)アイエム・リミテッドIM Ltd) First Sentier Investors (Australia	passive	520.2K	¥5,970	-1.4%	¥1.3B ($8.2M)
2022-01-11	BUY	Market Buy	スプラウスグローブ・インベストメント・マネジメント・リミテッド(Sprucegrove Investment Management Ltd.) Sprucegrove Investment Management Ltd.	other	4.0M	¥5,790	+4.5%	¥2.2B ($14.2M)

Showing the 50 most recent of 83 filings.

Frequently asked questions

Who has been buying Ain Holdings Inc. stock?: 14 distinct investors have filed 24 disclosed large-shareholding filings in Ain Holdings Inc. (9627), most recently on 2026-05-12. 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 Ain Holdings Inc. have?: Ain Holdings Inc. has 24 buy-side and 40 sell-side disclosures on record, covering ¥19.8B ($127.9M) in total reported value, spanning 2021-04-05 to 2026-05-12.
Where does StockDrifts get Ain Holdings 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 Ain Holdings Inc.. For how StockDrifts scores these disclosures, see the Japan insider signal tier research, or browse every Japanese stock we track.