Who has been buying Aqualine Ltd. stock?

13 distinct investors have filed 22 disclosed large-shareholding filings in Aqualine Ltd. (6173), most recently on 2026-04-22. 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 Aqualine Ltd. have?

Aqualine Ltd. has 22 buy-side and 23 sell-side disclosures on record, covering ¥1.6B ($10.1M) in total reported value, spanning 2022-03-04 to 2026-04-22.

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.

Aqualine Ltd. 6173

Company

株式会社アクアラインAqualine Ltd.

Investors

Buys

Total Value

¥1.6B ($10.1M)

Avg Return

-62.99%

Last Filing

2026-04-22

Aqualine Ltd. (6173) has 22 disclosed large-shareholding filings and 23 disclosed disposals on record, filed by 13 distinct investors. Together those filings cover ¥1.6B ($10.1M) in reported transaction value. The earliest filing StockDrifts holds for Aqualine Ltd. is dated 2022-03-04; the most recent is 2026-04-22. Across these filings the average return since disclosure is -62.99%, 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
2026-05-26	BUY	Market Buy	株式会社SAIAS SAIAS Inc.	passive	500.0K	¥15	-	¥11M ($69K)
2026-05-26	BUY	Market Buy	株式会社SAIAS SAIAS Inc.	passive	500.0K	¥15	-	¥8M ($48K)
2026-05-25	BUY	Market Buy	株式会社SAIAS SAIAS Inc.	passive	1.2M	¥19	-31.6%	¥23M ($149K)
2026-05-25	SELL	Market Buy	綿引一 Hajime Watahiki	passive	0	¥19	+31.6%	¥30M ($196K)
2026-05-18	SELL	unknown	ジャパンベストレスキューシステム株式会社 Japan Best Rescue System Co.,Ltd.	strategic	0	¥24	+45.8%	¥71M ($459K)
2026-04-22	BUY	Market Buy	理研Jテクノロジーズ合同会社 RIKEN J TECHNOLOGIES	passive	1.3M	¥123	-	¥154M ($992K)
2026-04-22	BUY	acquisition	理研Jテクノロジーズ合同会社 RIKEN J TECHNOLOGIES	passive	1.3M	¥123	-89.4%	¥154M ($992K)
2026-04-03	SELL	Market Buy	株式会社クシムインサイト Kushim Insight, Inc.	passive	174.7K	¥130	+90.0%	¥98M ($633K)
2026-04-03	BUY	Market Buy	株式会社クシムインサイト Kushim Insight, Inc.	passive	454.2K	¥130	-	¥62M ($399K)
2026-03-09	BUY	unknown	大垣内剛 Takeshi Okochi	strategic	792.2K	¥149	-	¥37M ($238K)
2026-02-24	BUY	unknown	大垣内剛 Takeshi Okochi	strategic	792.2K	¥180	-	-
2026-02-24	BUY	unknown	大垣内剛 Takeshi Okochi	strategic	792.2K	¥180	-	¥45M ($288K)
2026-02-20	SELL	subscription	ロングコリドーアセットマネジメントリミテッド(Long Corridor Asset Management Limited) Long Corridor Asset Management Limited	passive	140.0K	¥177	+92.7%	¥81M ($525K)
2026-02-17	SELL	subscription	ロングコリドーアセットマネジメントリミテッド(Long Corridor Asset Management Limited) Long Corridor Asset Management Limited	passive	600.0K	¥187	+93.0%	¥12M ($77K)
2026-02-06	SELL	Market Buy	ロング　コリドー　アセット　マネジメント　リミテッド(Long Corridor Asset Management Limited) Long Corridor Asset Management Limited	passive	665.0K	¥168	+92.3%	¥20M ($131K)
2026-02-04	SELL	Market Buy	ロング　コリドー　アセット　マネジメント　リミテッド(Long Corridor Asset Management Limited) Long Corridor Asset Management Limited	passive	795.0K	¥173	+92.5%	¥20M ($130K)
2026-02-02	SELL	Market Buy	ロングコリドーアセットマネジメントリミテッド(Long Corridor Asset Management Limited) Long Corridor Asset Management Limited	passive	920.0K	¥180	+92.8%	¥20M ($130K)
2026-01-29	SELL	Market Buy	ロングコリドーアセットマネジメントリミテッド(Long Corridor Asset Management Limited) Long Corridor Asset Management Limited	passive	1.0M	¥184	+92.9%	¥17M ($110K)
2026-01-27	SELL	Market Buy	ロングコリドーアセットマネジメントリミテッド(Long Corridor Asset Management Limited) Long Corridor Asset Management Limited	passive	1.1M	¥194	+93.3%	¥17M ($111K)
2026-01-27	SELL	Market Buy	ロングコリドーアセットマネジメントリミテッド(Long Corridor Asset Management Limited) Long Corridor Asset Management Limited	passive	1.2M	¥194	+93.3%	¥17M ($112K)
2026-01-22	BUY	Market Buy	榊原暢宏 Nobuhiro Sakakibara	passive	493.5K	¥195	-	¥96M ($621K)
2026-01-22	BUY	Market Buy	ITJ株式会社 ITJ, Inc.	other	815.9K	¥195	-93.3%	¥44M ($283K)
2026-01-22	SELL	Market Buy	ロングコリドーアセットマネジメントリミテッド(Long Corridor Asset Management Limited) Long Corridor Asset Management Limited	passive	1.3M	¥195	+93.3%	¥17M ($111K)
2026-01-22	BUY	unknown	ITJ株式会社代表取締役磯貝真輝 ITJ, Inc.	other	815.9K	¥195	-	¥45M ($288K)
2026-01-22	BUY	Market Buy	榊原暢宏 Nobuhiro Sakakibara	passive	553.5K	¥195	-	¥31M ($198K)
2026-01-14	SELL	Market Buy	ロングコリドーアセットマネジメントリミテッド(Long Corridor Asset Management Limited) Long Corridor Asset Management Limited	passive	1.4M	¥235	+94.5%	¥27M ($173K)
2026-01-13	SELL	Market Buy	ロングコリドーアセットマネジメントリミテッド(Long Corridor Asset Management Limited) Long Corridor Asset Management Limited	passive	1.6M	¥229	+94.3%	¥25M ($158K)
2025-12-25	SELL	Market Buy	株式会社クシムインサイト Kushim Insight, Inc.	passive	624.2K	¥216	+94.0%	¥1M ($8K)
2025-12-24	BUY	Market Buy	金田卓也 KANEDATAKUYA	passive	298.0K	¥223	-	¥18M ($119K)
2025-12-24	SELL	Market Buy	金田卓也 KANEDATAKUYA	passive	298.0K	¥223	+94.2%	¥18M ($119K)
2025-12-24	BUY	Market Buy	ロングコリドーアセットマネジメントリミテッド(Long Corridor Asset Management Limited) Long Corridor Asset Management Limited	passive	1.7M	¥223	-	¥379M ($2.4M)
2025-12-24	BUY	Market Buy	ロングコリドーアセットマネジメントリミテッド(Long Corridor Asset Management Limited) Long Corridor Asset Management Limited	passive	1.7M	¥223	-94.2%	¥248M ($1.6M)
2025-12-24	SELL	Market Buy	ロングコリドーアセットマネジメントリミテッド(Long Corridor Asset Management Limited) Long Corridor Asset Management Limited	passive	1.7M	¥223	+94.2%	¥2M ($12K)
2025-12-17	BUY	Market Buy	株式会社クシムインサイト Kushim Insight, Inc.	passive	704.8K	¥209	-	¥204M ($1.3M)
2025-12-17	BUY	Market Buy	株式会社クシムインサイト Kushim Insight, Inc.	passive	630.2K	¥209	-	¥16M ($101K)
2025-12-16	BUY	Market Buy	株式会社クシムインサイト Kushim Insight, Inc.	passive	704.8K	¥221	-	¥215M ($1.4M)
2025-12-16	SELL	Market Buy	株式会社クシムインサイト Kushim Insight, Inc.	passive	704.8K	¥221	+94.1%	¥215M ($1.4M)
2025-12-16	BUY	Market Buy	株式会社クシムインサイト Kushim Insight, Inc.	passive	630.2K	¥221	-	¥139M ($899K)
2025-12-16	BUY	Market Buy	株式会社クシムインサイト Kushim Insight, Inc.	passive	630.2K	¥221	-	¥17M ($107K)
2025-12-15	SELL	Market Buy	ロングコリドーアセットマネジメントリミテッド(Long Corridor Asset Management Limited) Long Corridor Asset Management Limited	passive	260.0K	¥244	+94.7%	¥44M ($283K)
2025-12-15	BUY	Market Buy	株式会社クシムインサイト Kushim Insight, Inc.	passive	630.2K	¥244	-94.7%	¥154M ($992K)
2025-12-15	BUY	Market Buy	株式会社クシムインサイト Kushim Insight, Inc.	passive	704.8K	¥244	-94.7%	¥172M ($1.1M)
2025-12-15	BUY	Market Buy	株式会社クシムインサイト Kushim Insight, Inc.	passive	704.8K	¥244	-	¥172M ($1.1M)
2025-12-10	BUY	Market Buy	ロングコリドーアセットマネジメントリミテッド(Long Corridor Asset Management Limited) Long Corridor Asset Management Limited	passive	430.0K	¥254	-94.9%	¥109M ($705K)
2025-12-09	SELL	unknown	大垣内剛 Takeshi Okochi	strategic	792.2K	¥238	+94.5%	¥4M ($26K)
2025-12-09	BUY	unknown	大垣内剛 Takeshi Okochi	strategic	792.2K	¥238	-	¥4M ($26K)
2025-12-09	BUY	unknown	大垣内剛 Takeshi Okochi	strategic	792.2K	¥238	-	-
2025-12-05	BUY	Market Buy	金田卓也 KANEDATAKUYA	passive	380.6K	¥198	-	¥26M ($167K)
2025-12-04	BUY	Market Buy	金田卓也 KANEDATAKUYA	passive	351.0K	¥209	-	¥73M ($473K)
2025-12-04	BUY	Market Buy	金田卓也 KANEDATAKUYA	passive	380.6K	¥209	-	¥27M ($175K)

Showing the 50 most recent of 82 filings.

Frequently asked questions

Who has been buying Aqualine Ltd. stock?: 13 distinct investors have filed 22 disclosed large-shareholding filings in Aqualine Ltd. (6173), most recently on 2026-04-22. 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 Aqualine Ltd. have?: Aqualine Ltd. has 22 buy-side and 23 sell-side disclosures on record, covering ¥1.6B ($10.1M) in total reported value, spanning 2022-03-04 to 2026-04-22.
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.

More on this data

Every trade listed above comes from an official regulatory disclosure. For how StockDrifts scores these disclosures, see the Japan insider signal tier research, or browse every Japanese stock we track.