Who has been buying Nippon Paper Industries Co., Ltd. stock?

24 distinct investors have filed 48 disclosed large-shareholding filings in Nippon Paper Industries Co., Ltd. (3863), 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 Nippon Paper Industries Co., Ltd. have?

Nippon Paper Industries Co., Ltd. has 48 buy-side and 35 sell-side disclosures on record, covering ¥55.2B ($356.1M) in total reported value, spanning 2021-04-05 to 2026-05-12.

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.

Nippon Paper Industries Co., Ltd. 3863

Company

日本製紙株式会社Nippon Paper Industries Co., Ltd.

Investors

Buys

Total Value

¥55.2B ($356.1M)

Avg Return

+36.98%

Last Filing

2026-05-12

Nippon Paper Industries Co., Ltd. (3863) has 48 disclosed large-shareholding filings and 35 disclosed disposals on record, filed by 24 distinct investors. Together those filings cover ¥55.2B ($356.1M) in reported transaction value. The earliest filing StockDrifts holds for Nippon Paper Industries Co., Ltd. is dated 2021-04-05; the most recent is 2026-05-12. Across these filings the average return since disclosure is +36.98%, 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
2026-07-23	BUY	unknown	野村絢	activist	2.5M	¥1,590	-	-
2026-07-23	BUY	unknown	株式会社シティインデックスイレブンス	activist	100	¥1,590	-	-
2026-07-23	BUY	Market Buy	株式会社Mホールディングス	activist	6.8M	¥1,590	-16.2%	¥776M ($5.0M)
2026-07-23	BUY	Market Buy	株式会社C&I Holdings	activist	2.1M	¥1,590	-16.2%	¥1.2B ($7.5M)
2026-07-06	BUY	Market Buy	ブラックロック・ジャパン株式会社	passive	2.1M	¥1,337	-0.3%	¥2.8B ($18.1M)
2026-07-06	BUY	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	623.3K	¥1,337	-0.3%	¥833M ($5.4M)
2026-07-06	BUY	Market Buy	ブラックロック・ファンド・アドバイザーズ BlackRock Fund Advisors	passive	2.5M	¥1,337	-0.3%	¥3.4B ($21.6M)
2026-07-06	BUY	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, N.A.	passive	1.0M	¥1,337	-0.3%	¥1.4B ($8.8M)
2026-06-15	BUY	unknown	野村絢	activist	2.5M	¥1,235	-	-
2026-06-15	BUY	unknown	株式会社C&I Holdings	activist	1.4M	¥1,235	-	¥1.7B ($10.9M)
2026-06-15	BUY	unknown	株式会社Mホールディングス	activist	6.3M	¥1,235	-	-
2026-06-15	BUY	unknown	株式会社シティインデックスイレブンス	activist	100	¥1,235	-	-
2026-06-09	BUY	unknown	株式会社シティインデックスイレブンス	activist	100	¥1,237	-	-
2026-06-09	BUY	unknown	野村絢	activist	2.5M	¥1,237	-	-
2026-06-09	BUY	Market Buy	株式会社Mホールディングス	activist	6.3M	¥1,237	+7.8%	¥1.6B ($10.3M)
2026-06-03	BUY	Market Buy	野村絢	activist	2.5M	¥1,198	+11.3%	¥14M ($90K)
2026-06-03	BUY	Market Buy	株式会社Mホールディングス	activist	5.0M	¥1,198	+11.3%	¥1.8B ($11.9M)
2026-06-03	BUY	unknown	株式会社シティインデックスイレブンス	activist	100	¥1,198	-	-
2026-05-12	BUY	unknown	株式会社シティインデックスイレブンス	activist	100	¥1,510	-11.7%	¥151K ($974)
2026-05-12	BUY	unknown	野村絢	activist	2.5M	¥1,510	-11.7%	¥3.7B ($24.1M)
2026-05-12	BUY	unknown	株式会社Mホールディングス	activist	3.5M	¥1,510	-11.7%	¥5.2B ($33.8M)
2025-12-22	BUY	Market Buy	日本生命保険相互会社	passive	2.5M	¥1,141	-	-
2025-12-22	BUY	Market Buy	ニッセイアセットマネジメント株式会社	other	1.2M	¥1,141	+16.8%	¥146M ($941K)
2025-12-22	SELL	Market Buy	大樹生命保険株式会社	passive	2.3M	¥1,141	-16.8%	¥13M ($86K)
2025-12-19	SELL	negotiated	三井住友信託銀行株式会社	strategic	449.7K	¥1,116	-19.4%	¥65M ($419K)
2025-12-19	SELL	negotiated	三井住友トラスト・アセットマネジメント株式会社	other	3.0M	¥1,116	-19.4%	¥26M ($167K)
2025-12-19	SELL	negotiated	アモーヴァ・アセットマネジメント株式会社	other	1.8M	¥1,116	-19.4%	¥1.2B ($8.0M)
2025-09-19	BUY	negotiated	三井住友信託銀行株式会社 Sumitomo Mitsui Trust Bank,Limited	strategic	508.2K	¥1,248	-	-
2025-09-19	SELL	negotiated	三井住友トラスト・アセットマネジメント株式会社 Sumitomo Mitsui Trust Asset Management Co.,Ltd.	other	3.0M	¥1,248	-6.8%	¥348M ($2.2M)
2025-09-19	SELL	negotiated	アモーヴァ・アセットマネジメント株式会社 Amova Asset Management Co., Ltd.	other	3.0M	¥1,248	-6.8%	¥87M ($562K)
2025-04-21	SELL	Market Buy	三井住友信託銀行株式会社 Sumitomo Mitsui Trust Bank,Limited	strategic	508.2K	¥1,110	-20.1%	¥9.0B ($58.3M)
2025-04-21	BUY	Market Buy	三井住友トラスト・アセットマネジメント株式会社 Sumitomo Mitsui Trust Asset Management Co.,Ltd.	other	3.3M	¥1,110	+20.1%	¥245M ($1.6M)
2025-04-21	BUY	Market Buy	日興アセットマネジメント株式会社 Nikko Asset Management Co.,Ltd.	other	3.0M	¥1,110	+20.1%	¥77M ($500K)
2025-03-06	SELL	Market Buy	ブラックロック・ジャパン株式会社 BlackRock Japan Co., Ltd.	passive	1.8M	¥1,059	-25.9%	¥332M ($2.1M)
2025-03-06	BUY	Market Buy	ブラックロック・フィナンシャル・マネジメント・インク(BlackRock Financial Management BlackRock Financial Management, Inc.	passive	28.6K	¥1,059	+25.9%	¥2.3B ($14.9M)
2025-03-06	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	599.8K	¥1,059	-25.9%	¥616M ($4.0M)
2025-03-06	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	1.6M	¥1,059	-25.9%	¥246M ($1.6M)
2025-03-06	BUY	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	897.0K	¥1,059	+25.9%	¥98M ($635K)
2025-02-07	BUY	unknown	株式会社みずほ銀行 Mizuho Bank, Ltd.	strategic	2.0M	¥919	-	-
2025-02-07	SELL	unknown	みずほ証券株式会社 Mizuho Securities Co., Ltd.	other	99.9K	¥919	-45.0%	¥545M ($3.5M)
2025-02-07	SELL	unknown	みずほ信託銀行株式会社 Mizuho Trust & Banking Co., Ltd.	other	264.8K	¥919	-45.0%	¥844M ($5.4M)
2025-02-07	SELL	unknown	アセットマネジメントOne株式会社 Asset Management One Co., Ltd.	other	2.6M	¥919	-45.0%	¥256M ($1.7M)
2024-11-21	BUY	negotiated	三井住友信託銀行株式会社 Sumitomo Mitsui Trust Bank,Limited	strategic	597.9K	¥846	-	-
2024-11-21	BUY	negotiated	三井住友トラスト・アセットマネジメント株式会社 Sumitomo Mitsui Trust Asset Management Co.,Ltd.	other	3.1M	¥846	+57.6%	¥89M ($571K)
2024-11-21	SELL	negotiated	日興アセットマネジメント株式会社 Nikko Asset Management Co.,Ltd.	other	2.9M	¥846	-57.6%	¥561M ($3.6M)
2024-10-03	BUY	Market Buy	ブラックロック・ファンド・アドバイザーズ BlackRock Fund Advisors	passive	1.9M	¥965	+38.1%	¥1.8B ($11.6M)
2024-10-03	BUY	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	801.7K	¥965	+38.1%	¥774M ($5.0M)
2024-10-03	BUY	Market Buy	ブラックロック・ジャパン株式会社 BlackRock Japan Co., Ltd.	passive	2.2M	¥965	+38.1%	¥2.1B ($13.4M)
2024-10-03	BUY	Market Buy	ブラックロック・フィナンシャル・マネジメント・インク(BlackRock Financial Management BlackRock Financial Management, Inc.	passive	154.9K	¥965	+38.1%	¥149M ($964K)
2024-10-03	BUY	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	1.2M	¥965	+38.1%	¥1.1B ($7.4M)

Showing the 50 most recent of 133 filings.

Frequently asked questions

Who has been buying Nippon Paper Industries Co., Ltd. stock?: 24 distinct investors have filed 48 disclosed large-shareholding filings in Nippon Paper Industries Co., Ltd. (3863), 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 Nippon Paper Industries Co., Ltd. have?: Nippon Paper Industries Co., Ltd. has 48 buy-side and 35 sell-side disclosures on record, covering ¥55.2B ($356.1M) in total reported value, spanning 2021-04-05 to 2026-05-12.
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.