Who has been buying The Pack Corporation stock?

11 distinct investors have filed 41 disclosed large-shareholding filings in The Pack Corporation (3950), most recently on 2026-04-08. 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 The Pack Corporation have?

The Pack Corporation has 41 buy-side and 27 sell-side disclosures on record, covering ¥8.6B ($55.3M) in total reported value, spanning 2021-07-21 to 2026-04-08.

Where does StockDrifts get The Pack Corporation 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.

The Pack Corporation 3950

Company

ザ・パック株式会社The Pack Corporation

Investors

Buys

Total Value

¥8.6B ($55.3M)

Avg Return

+22.76%

Last Filing

2026-04-08

The Pack Corporation (3950) has 41 disclosed large-shareholding filings and 27 disclosed disposals on record, filed by 11 distinct investors. Together those filings cover ¥8.6B ($55.3M) in reported transaction value. The earliest filing StockDrifts holds for The Pack Corporation is dated 2021-07-21; the most recent is 2026-04-08. 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 +22.76%, 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
2026-07-02	BUY	negotiated	ダルトン・インベストメンツ・インク Dalton Investments, Inc.	activist	73.2K	¥1,358	+6.8%	¥99M ($641K)
2026-07-02	BUY	Market Buy	エヌエーブイエフ・セレクト・マスター・ファンド・エルピーFund LP) NAVF Select (Master	activist	2.8M	¥1,358	+6.8%	¥357M ($2.3M)
2026-07-02	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	3.1M	¥1,358	+6.8%	¥470M ($3.0M)
2026-07-02	BUY	negotiated	ダルトン・インベストメンツ・インク Dalton Investments, Inc.	activist	73.2K	¥1,358	+6.8%	¥99M ($641K)
2026-07-02	BUY	Market Buy	エヌエーブイエフ・セレクト・マスター・ファンド・エルピーFund LP) NAVF Select (Master	activist	2.8M	¥1,358	+6.8%	¥357M ($2.3M)
2026-07-02	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	3.1M	¥1,358	+6.8%	¥470M ($3.0M)
2026-06-19	SELL	unknown	フィデリティマネジメントアンドリサーチカンパニーエルエルシー Fidelity Management & Research Company LLC	corporate	1.4M	¥1,360	-4.5%	¥41M ($262K)
2026-06-19	BUY	Market Buy	フィデリティマネジメントトラストカンパニー Fidelity Management Trust Company	other	218.2K	¥1,360	+4.5%	¥5M ($35K)
2026-06-19	BUY	unknown	エフアイエーエムエルエルシー FIAM LLC	other	71.6K	¥1,360	+4.5%	¥97M ($628K)
2026-06-19	BUY	unknown	フィデリティマネジメントトラストカンパニー Fidelity Management Trust Company	other	239.7K	¥1,360	+4.5%	¥326M ($2.1M)
2026-06-19	SELL	unknown	フィデリティマネジメントアンドリサーチカンパニーエルエルシー Fidelity Management & Research Company LLC	corporate	1.7M	¥1,360	-4.5%	¥411M ($2.7M)
2026-06-19	SELL	unknown	フィデリティマネジメントトラストカンパニー Fidelity Management Trust Company	other	215.8K	¥1,360	-4.5%	¥32M ($210K)
2026-06-19	SELL	unknown	フィデリティマネジメントアンドリサーチカンパニーエルエルシー Fidelity Management & Research Company LLC	corporate	1.5M	¥1,360	-4.5%	¥303M ($2.0M)
2026-06-19	BUY	unknown	フィデリティマネジメントトラストカンパニー Fidelity Management Trust Company	other	215.6K	¥1,360	+4.5%	¥293M ($1.9M)
2026-06-19	BUY	unknown	エフアイエーエムエルエルシー FIAM LLC	other	71.6K	¥1,360	+4.5%	¥97M ($628K)
2026-06-19	SELL	unknown	フィデリティマネジメントアンドリサーチカンパニーエルエルシー Fidelity Management & Research Company LLC	corporate	1.4M	¥1,360	-4.5%	¥3M ($17K)
2026-06-09	BUY	Market Buy	エヌエーブイエフ・セレクト・マスター・ファンド・エルピーFund LP) NAVF Select (Master	activist	2.6M	¥1,265	+5.5%	¥204M ($1.3M)
2026-06-09	BUY	negotiated	ダルトン・インベストメンツ・インク Dalton Investments, Inc.	activist	73.2K	¥1,265	+5.5%	¥93M ($597K)
2026-06-09	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	2.8M	¥1,265	+5.5%	¥453M ($2.9M)
2026-04-08	BUY	Market Buy	エヌエーブイエフ・セレクト・マスター・ファンド・エルピーFund LP) NAVF Select (Master	activist	2.4M	¥1,378	-3.6%	¥420M ($2.7M)
2026-04-08	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	2.4M	¥1,378	-3.6%	¥420M ($2.7M)
2026-03-13	BUY	Market Buy	エヌエーブイエフ・セレクト・エルエルシー NAVF Select LLC	activist	2.1M	¥1,320	+1.7%	¥2.8B ($18.2M)
2026-03-13	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	2.1M	¥1,320	+1.7%	¥2.8B ($18.2M)
2026-02-04	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） NIPPON ACTIVE VALUE FUND PLC	activist	3.6M	¥1,305	+2.8%	¥787M ($5.1M)
2025-11-13	BUY	unknown	エヌエーブイエフ・セレクト・エルエルシー NAVF Select LLC	activist	1.5M	¥1,244	+7.9%	¥1.9B ($12.0M)
2025-11-13	BUY	unknown	ニッポン・アクティブ・バリュー・ファンド（NIPPON ACTIVE VALUE FUND PLC） NIPPON ACTIVE VALUE FUND PLC	activist	3.0M	¥1,244	+7.9%	¥3.7B ($24.0M)
2025-11-13	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	1.5M	¥1,244	+7.9%	¥1.9B ($12.0M)
2025-09-16	SELL	negotiated	三菱UFJアセットマネジメント株式会社 Mitsubishi UFJ Financial Group Inc.	passive	259.2K	¥1,201	-11.7%	¥29M ($185K)
2025-09-16	SELL	negotiated	三菱UFJ信託銀行株式会社 Mitsubishi UFJ Financial Group Inc.	passive	870.9K	¥1,201	-11.7%	¥645M ($4.2M)
2025-09-16	SELL	unknown	公益財団法人森田記念福祉財団 Public interest incorporated foundation Moritakinenfukushizaidan	other	6.2M	¥1,201	-11.7%	¥208M ($1.3M)
2025-09-16	SELL	negotiated	株式会社三菱UFJ銀行 Mitsubishi UFJ Financial Group Inc.	strategic	558.0K	¥1,201	-11.7%	¥1.1B ($7.2M)
2025-03-21	BUY	negotiated	日興アセットマネジメント株式会社 Nikko Asset Management Co.,Ltd.	other	217.8K	¥1,123.33	+19.5%	¥245M ($1.6M)
2025-03-21	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	360.9K	¥1,123.33	+19.5%	¥393M ($2.5M)
2025-03-21	BUY	negotiated	三井住友信託銀行株式会社 Sumitomo Mitsui Trust Bank,Limited	strategic	42.0K	¥1,123.33	+19.5%	¥47M ($304K)
2025-01-20	BUY	negotiated	株式会社三菱UFJ銀行 Mitsubishi UFJ Financial Group Inc.	strategic	494.9K	¥1,163.33	+15.4%	¥576M ($3.7M)
2025-01-20	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	9.2K	¥1,163.33	+15.4%	¥889M ($5.7M)
2025-01-20	BUY	negotiated	三菱UFJアセットマネジメント株式会社 Mitsubishi UFJ Financial Group Inc.	passive	93.1K	¥1,163.33	+15.4%	¥25M ($164K)
2025-01-20	BUY	negotiated	三菱UFJ信託銀行株式会社 Mitsubishi UFJ Financial Group Inc.	passive	469.8K	¥1,163.33	+15.4%	¥547M ($3.5M)
2025-01-06	BUY	Market Buy	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	230.7K	¥1,205	+11.4%	¥278M ($1.8M)
2025-01-06	SELL	Market Buy	三菱UFJアセットマネジメント株式会社 Mitsubishi UFJ Financial Group Inc.	passive	72.3K	¥1,205	-11.4%	¥26M ($170K)
2025-01-06	BUY	Market Buy	三菱UFJ信託銀行株式会社 Mitsubishi UFJ Financial Group Inc.	passive	468.9K	¥1,205	+11.4%	¥19M ($124K)
2025-01-06	BUY	Market Buy	株式会社三菱UFJ銀行 Mitsubishi UFJ Financial Group Inc.	strategic	494.9K	¥1,205	+11.4%	¥596M ($3.8M)
2024-12-05	SELL	negotiated	日興アセットマネジメント株式会社 Nikko Asset Management Co.,Ltd.	other	216.1K	¥1,203.33	-11.5%	¥19M ($124K)
2024-12-05	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	1.0M	¥1,203.33	-11.5%	¥7M ($46K)
2024-12-05	BUY	negotiated	三井住友信託銀行株式会社 Sumitomo Mitsui Trust Bank,Limited	strategic	42.0K	¥1,203.33	+11.5%	¥51M ($326K)
2024-07-29	BUY	negotiated	株式会社三菱UFJ銀行 Mitsubishi UFJ Financial Group Inc.	strategic	494.9K	¥1,298.33	+3.4%	¥643M ($4.1M)
2024-07-29	BUY	negotiated	三菱UFJアセットマネジメント株式会社 Mitsubishi UFJ Financial Group Inc.	passive	92.8K	¥1,298.33	+3.4%	¥120M ($777K)
2024-07-29	BUY	negotiated	三菱UFJ信託銀行株式会社 Mitsubishi UFJ Financial Group Inc.	passive	454.0K	¥1,298.33	+3.4%	¥3M ($17K)
2024-07-22	BUY	unknown	エフエムアールエルエルシー(FMR LLC) FMR LLC	other	1.7M	¥1,303.33	+3.0%	¥2.2B ($14.5M)
2024-07-16	BUY	negotiated	株式会社三菱UFJ銀行 Mitsubishi UFJ Financial Group Inc.	strategic	494.9K	¥1,326.67	+1.2%	¥657M ($4.2M)

Showing the 50 most recent of 126 filings.

Frequently asked questions

Who has been buying The Pack Corporation stock?: 11 distinct investors have filed 41 disclosed large-shareholding filings in The Pack Corporation (3950), most recently on 2026-04-08. 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 The Pack Corporation have?: The Pack Corporation has 41 buy-side and 27 sell-side disclosures on record, covering ¥8.6B ($55.3M) in total reported value, spanning 2021-07-21 to 2026-04-08.
Where does StockDrifts get The Pack Corporation 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 The Pack Corporation. For how StockDrifts scores these disclosures, see the Japan insider signal tier research, or browse every Japanese stock we track.