Who has been buying Rinnai Corporation stock?

27 distinct investors have filed 30 disclosed large-shareholding filings in Rinnai Corporation (5947), most recently on 2026-01-30. 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 Rinnai Corporation have?

Rinnai Corporation has 30 buy-side and 17 sell-side disclosures on record, covering ¥136.8B ($882.5M) in total reported value, spanning 2021-08-24 to 2026-01-30.

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.

Rinnai Corporation 5947

Company

リンナイ株式会社Rinnai Corporation

Investors

Buys

Total Value

¥136.8B ($882.5M)

Avg Return

+6.22%

Last Filing

2026-01-30

Rinnai Corporation (5947) has 30 disclosed large-shareholding filings and 17 disclosed disposals on record, filed by 27 distinct investors. Together those filings cover ¥136.8B ($882.5M) in reported transaction value. The earliest filing StockDrifts holds for Rinnai Corporation is dated 2021-08-24; the most recent is 2026-01-30. Across these filings the average return since disclosure is +6.22%, 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
2026-01-30	BUY	Market Buy	ダルトン・インベストメンツ・インク(Dalton Investments, Inc.) Dalton Investments, Inc.	activist	8.9M	¥4,059	-16.8%	¥5.8B ($37.7M)
2025-09-18	SELL	unknown	野村證券株式会社 Nomura Securities Co.,Ltd.	other	87.8K	¥3,695	+8.6%	¥117.0B ($754.6M)
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	470.4K	¥3,695	-	¥1.7B ($11.2M)
2025-09-18	BUY	unknown	野村アセットマネジメント株式会社 Nomura Asset Management Co., Ltd.	other	6.5M	¥3,695	-8.6%	¥23.9B ($154.2M)
2024-11-19	SELL	negotiated	ニッポン・アクティブ・バリュー・ファンド NIPPON ACTIVE VALUE FUND PLC	activist	0	¥3,193	-5.8%	¥3.2B ($20.5M)
2024-11-19	SELL	negotiated	ダルトン・インベストメンツ・インク(Dalton Investments Dalton Investments, Inc.	activist	7.8M	¥3,193	-5.8%	¥1.5B ($10.0M)
2024-06-06	BUY	unknown	野村證券株式会社 Nomura Securities Co.,Ltd.	other	404.5K	¥3,716	-	¥1.5B ($9.7M)
2024-06-06	BUY	unknown	ノムラインターナショナルピーエルシー NOMURA INTERNATIONAL PLC	other	54.3K	¥3,716	-9.1%	¥20.4B ($131.9M)
2024-06-06	BUY	unknown	野村アセットマネジメント株式会社 Nomura Asset Management Co., Ltd.	other	7.8M	¥3,716	-9.1%	¥28.8B ($185.9M)
2024-02-08	BUY	unknown	ニッポン・アクティブ・バリュー・ファンド NIPPON ACTIVE VALUE FUND PLC	activist	1.0M	¥3,287	-	-
2024-02-08	SELL	unknown	ダルトン・インベストメンツ・インク(Dalton Investments Dalton Investments, Inc.	activist	8.3M	¥3,287	-2.7%	¥530M ($3.4M)
2024-01-11	BUY	Market Buy	ニッポン・アクティブ・バリュー・ファンド NIPPON ACTIVE VALUE FUND PLC	activist	1.0M	¥3,345	+1.0%	¥147M ($950K)
2024-01-11	SELL	Market Buy	ダルトン・インベストメンツ・エルエルシー Dalton Investments LLC	activist	0	¥3,345	-1.0%	¥26.2B ($169.0M)
2024-01-11	SELL	Market Buy	エヌエーブイエフ・セレクト・エルエルシー NAVF Select LLC	activist	0	¥3,345	-1.0%	¥1.6B ($10.4M)
2024-01-11	BUY	Market Buy	ダルトン・インベストメンツ・インク(Dalton Investments Dalton Investments, Inc.	activist	8.4M	¥3,345	-	¥28.2B ($181.8M)
2023-12-05	BUY	unknown	野村證券株式会社 Nomura Securities Co.,Ltd.	other	48.9K	¥3,020	+11.8%	¥12.6B ($81.3M)
2023-12-05	SELL	unknown	ノムラインターナショナルピーエルシー NOMURA INTERNATIONAL PLC	other	378.9K	¥3,020	-11.8%	¥3.0B ($19.6M)
2023-12-05	BUY	unknown	野村アセットマネジメント株式会社 Nomura Asset Management Co., Ltd.	other	9.6M	¥3,020	+11.8%	¥4.9B ($31.6M)
2023-10-18	BUY	unknown	ニッポン・アクティブ・バリュー・ファンド NIPPON ACTIVE VALUE FUND PLC	activist	973.8K	¥2,743	-	¥2.7B ($17.2M)
2023-10-18	BUY	unknown	ダルトン・インベストメンツ・エルエルシー Dalton Investments LLC	activist	8.0M	¥2,743	+23.1%	¥1.6B ($10.1M)
2023-10-18	BUY	unknown	エヌエーブイエフ・セレクト・エルエルシー NAVF Select LLC	activist	500.0K	¥2,743	-	-
2023-10-18	BUY	unknown	ダルトン・インベストメンツ・エルエルシー Dalton Investments LLC	activist	8.0M	¥2,743	+23.1%	¥1.6B ($10.1M)
2023-10-18	BUY	unknown	エヌエーブイエフ・セレクト・エルエルシー NAVF Select LLC	activist	500.0K	¥2,743	-	-
2023-10-18	BUY	unknown	ニッポン・アクティブ・バリュー・ファンド NIPPON ACTIVE VALUE FUND PLC	activist	973.8K	¥2,743	-	¥2.7B ($17.2M)
2023-10-04	BUY	acquisition	ダルトン・インベストメンツ・エルエルシー Dalton Investments LLC	activist	7.4M	¥2,773.5	+21.8%	¥20.7B ($133.2M)
2023-10-04	BUY	acquisition	マイケル・ワン・サウザンド・ナイン・ハンドレッド・トゥエンティ・ファイブ・エルエルシー(2023年10月1日付で名称を「エヌエーブイエフ・セレクト・エルエルシーに変更」) Michael 1925 LLC	activist	500.0K	¥2,773.5	+21.8%	¥1.4B ($8.9M)
2023-08-22	SELL	unknown	フィデリティ投信株式会社 FIL Investments (Japan) Limited	other	5.3M	¥2,750.5	-22.8%	¥6.1B ($39.7M)
2023-08-01	BUY	Market Buy	内藤弘康 Hiroyasu Naito	activist	1.5M	¥3,118	+8.3%	¥140M ($906K)
2023-08-01	BUY	Market Buy	内藤ゆき美 Yukimi Naito	activist	1.7M	¥3,118	+8.3%	¥140M ($906K)
2023-08-01	BUY	Market Buy	内藤万琴 Makoto Naito	activist	1.7M	¥3,118	+8.3%	¥3.4B ($22.0M)
2023-08-01	BUY	Market Buy	内藤大祐 Daisuke Naito	activist	798	¥3,118	-	¥2M ($16K)
2023-08-01	BUY	Market Buy	内藤大蔵株式会社 Naito Okura Co., Ltd.	activist	727.6K	¥3,118	+8.3%	¥47M ($302K)
2023-08-01	BUY	Market Buy	錦成株式会社 Kinsei Co., Ltd.	activist	1.4M	¥3,118	+8.3%	¥140M ($906K)
2023-08-01	BUY	Market Buy	内藤株式会社 Naito Corporation	activist	18.6M	¥3,118	+8.3%	¥1.8B ($11.8M)
2023-06-07	SELL	unknown	フィデリティ投信株式会社 FIL Investments (Japan) Limited	other	7.6M	¥3,021	-11.8%	¥4.8B ($31.0M)
2023-05-22	SELL	unknown	フィデリティ投信株式会社 FIL Investments (Japan) Limited	other	9.2M	¥3,240	-4.2%	¥6.5B ($41.7M)
2022-06-07	BUY	unknown	野村證券株式会社 Nomura Securities Co.,Ltd.	other	108.1K	¥2,986.66	-	¥323M ($2.1M)
2022-06-07	BUY	Market Buy	フィデリティ投信株式会社 FIL Investments (Japan) Limited	other	3.7M	¥2,986.66	+13.1%	¥2.6B ($16.7M)
2022-06-07	BUY	unknown	ノムラインターナショナルピーエルシー NOMURA INTERNATIONAL PLC	other	459.1K	¥2,986.66	+13.1%	¥1.0B ($6.5M)
2022-06-07	BUY	unknown	野村アセットマネジメント株式会社 Nomura Asset Management Co., Ltd.	other	2.7M	¥2,986.66	+13.1%	¥777M ($5.0M)
2022-06-06	BUY	Market Buy	ブラックロック・ジャパン株式会社 BlackRock Japan Co., Ltd.	passive	638.2K	¥2,940	+14.9%	¥309M ($2.0M)
2022-06-06	BUY	Market Buy	ブラックロック(ネザーランド)BVBV) BlackRock (Netherlands	passive	50.7K	¥2,940	-	¥149M ($963K)
2022-06-06	SELL	Market Buy	ブラックロック・ファンド・マネジャーズ・リミテッド BlackRock Fund Managers Limited	passive	66.8K	¥2,940	-14.9%	¥44M ($285K)
2022-06-06	BUY	Market Buy	ブラックロック(ルクセンブルグ)エス・エーS.A.) BlackRock (Luxembourg	passive	70.4K	¥2,940	-	¥207M ($1.3M)
2022-06-06	SELL	Market Buy	ブラックロック・ライフ・リミテッド BlackRock Life Limited	passive	27.3K	¥2,940	-14.9%	¥88M ($569K)
2022-06-06	SELL	Market Buy	ブラックロック・アセット・マネジメント・アイルランド・リミテッド BlackRock Asset Management Ireland Limited	passive	60.9K	¥2,940	-14.9%	¥353M ($2.3M)
2022-06-06	SELL	Market Buy	ブラックロック・ファンド・アドバイザーズ BlackRock Fund Advisors	passive	410.6K	¥2,940	-14.9%	¥1.3B ($8.4M)
2022-06-06	SELL	Market Buy	ブラックロック・インスティテューショナル・トラスト・カンパニー、エヌ.エイ.(BlackRock Institutional Trust Company BlackRock Institutional Trust Company, N.A.	passive	236.5K	¥2,940	-14.9%	¥1.1B ($7.3M)
2022-06-06	SELL	Market Buy	ブラックロック・インベストメント・マネジメント(ユーケー)リミテッドLimited) BlackRock Investment Management (UK	passive	49.4K	¥2,940	-14.9%	¥382M ($2.5M)
2022-01-11	BUY	unknown	ノムラインターナショナルピーエルシー NOMURA INTERNATIONAL PLC	other	123.3K	¥3,396.66	-0.6%	¥419M ($2.7M)

Showing the 50 most recent of 61 filings.

Frequently asked questions

Who has been buying Rinnai Corporation stock?: 27 distinct investors have filed 30 disclosed large-shareholding filings in Rinnai Corporation (5947), most recently on 2026-01-30. 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 Rinnai Corporation have?: Rinnai Corporation has 30 buy-side and 17 sell-side disclosures on record, covering ¥136.8B ($882.5M) in total reported value, spanning 2021-08-24 to 2026-01-30.
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.