Who has been buying Internet Initiative Japan Inc. stock?

10 distinct investors have filed 11 disclosed large-shareholding filings in Internet Initiative Japan Inc. (3774), most recently on 2026-05-13. 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 Internet Initiative Japan Inc. have?

Internet Initiative Japan Inc. has 11 buy-side and 8 sell-side disclosures on record, covering ¥130.7B ($843.2M) in total reported value, spanning 2022-11-10 to 2026-05-13.

Where does StockDrifts get Internet Initiative Japan 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.

Internet Initiative Japan Inc. 3774

Company

株式会社インターネットイニシアティブInternet Initiative Japan Inc.

Investors

Buys

Total Value

¥130.7B ($843.2M)

Avg Return

+7.00%

Last Filing

2026-05-13

Internet Initiative Japan Inc. (3774) has 11 disclosed large-shareholding filings and 8 disclosed disposals on record, filed by 10 distinct investors. Together those filings cover ¥130.7B ($843.2M) in reported transaction value. The earliest filing StockDrifts holds for Internet Initiative Japan Inc. is dated 2022-11-10; the most recent is 2026-05-13. 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 +7.00%, 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
2026-07-01	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	16.6M	¥3,161	+10.8%	¥6.0B ($38.5M)
2026-06-19	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	1.2M	¥2,998	+16.3%	¥55M ($355K)
2026-06-19	SELL	unknown	野村アセットマネジメント株式会社	other	6.1M	¥2,998	-16.3%	¥5.6B ($36.2M)
2026-06-19	SELL	unknown	野村證券株式会社	other	885.9K	¥2,998	-16.3%	¥275M ($1.8M)
2026-05-13	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.	other	14.8M	¥3,008	+7.2%	¥3.1B ($19.9M)
2026-05-07	BUY	acquisition	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	13.7M	¥2,770.5	+16.4%	¥38.0B ($245.3M)
2026-03-05	BUY	unknown	野村アセットマネジメント株式会社	other	8.0M	¥2,191	+22.7%	¥21.5B ($138.9M)
2026-03-05	BUY	unknown	ノムラインターナショナルピーエルシー NOMURA INTERNATIONAL PLC	other	1.2M	¥2,191	+22.7%	¥3.3B ($21.1M)
2026-03-05	BUY	unknown	野村證券株式会社	other	979.2K	¥2,191	+22.7%	¥2.6B ($17.0M)
2025-11-10	SELL	negotiated	NTTドコモビジネス株式会社 NTT Docomo Business Co., Ltd.	strategic	8.2M	¥2,864	+6.1%	¥52M ($338K)
2025-11-10	SELL	negotiated	NTT株式会社 NTT, Inc.	strategic	12.2M	¥2,864	+6.1%	¥52M ($338K)
2025-04-22	BUY	Market Buy	グローバル・アルファ・キャピタル・マネージメント・エルティーディー(Global Alpha Capital Management Ltd.) Global Alpha Capital Management Ltd.	passive	7.4M	¥2,645.5	+1.6%	¥5.0B ($32.2M)
2025-04-22	SELL	Market Buy	グローバル・アルファ・キャピタル・マネージメント・エルティーディー(Global Alpha Capital Management Ltd.) Global Alpha Capital Management Ltd.	passive	7.4M	¥2,645.5	-1.6%	¥5.0B ($32.2M)
2024-10-15	SELL	Market Buy	グローバル・アルファ・キャピタル・マネージメント・エルティーディー(Global Alpha Capital Management Ltd.) Global Alpha Capital Management Ltd.	passive	9.3M	¥2,986.5	+10.0%	¥5.5B ($35.3M)
2024-08-09	BUY	Market Buy	グローバル・アルファ・キャピタル・マネージメント・エルティーディー(Global Alpha Capital Management Ltd.) Global Alpha Capital Management Ltd.	passive	11.1M	¥2,550	+5.4%	¥4.9B ($31.6M)
2024-08-09	BUY	Market Buy	グローバル・アルファ・キャピタル・マネージメント・エルティーディー(Global Alpha Capital Management Ltd.) Global Alpha Capital Management Ltd.	passive	11.1M	¥2,550	+5.4%	¥4.9B ($31.6M)
2023-10-27	BUY	acquisition	グローバル・アルファ・キャピタル・マネージメント・エルティーディー(Global Alpha Capital Management Ltd.) Global Alpha Capital Management Ltd.	passive	9.2M	¥2,425	+10.9%	¥22.2B ($143.4M)
2023-05-26	BUY	negotiated	エヌ・ティ・ティ・コミュニケーションズ株式会社 NTT Communications Co., Ltd.	strategic	8.2M	¥2,728	-1.4%	¥500M ($3.2M)
2023-05-26	SELL	negotiated	日本電信電話株式会社 NIPPON TELEGRAPH AND TELEPHONE CORPORATION	strategic	12.2M	¥2,728	+1.4%	¥14.0B ($90.6M)
2023-05-25	BUY	negotiated	エヌ・ティ・ティ・コミュニケーションズ株式会社 NTT Communications Co., Ltd.	strategic	8.2M	¥2,710	-0.8%	¥22.1B ($142.7M)
2023-05-25	SELL	negotiated	日本電信電話株式会社 NIPPON TELEGRAPH AND TELEPHONE CORPORATION	strategic	17.7M	¥2,710	+0.8%	¥10.6B ($68.7M)
2023-05-24	SELL	negotiated	エヌ・ティ・ティ・コミュニケーションズ株式会社 NTT Communications Co., Ltd.	strategic	8.2M	¥2,757	+2.5%	¥52M ($333K)
2023-05-24	BUY	negotiated	日本電信電話株式会社 NIPPON TELEGRAPH AND TELEPHONE CORPORATION	strategic	21.7M	¥2,757	-2.5%	¥58.7B ($378.5M)
2023-05-19	BUY	acquisition	KDDI株式会社 KDDI CORPORATION	strategic	20.4M	¥2,965	-9.3%	¥60.4B ($390.0M)
2023-04-14	BUY	Market Buy	株式会社KS Holdings KS Holdings Co., Ltd.	strategic	3.2M	¥2,753	-2.3%	¥8.9B ($57.5M)
2023-04-14	BUY	Market Buy	鈴木幸一 Koichi Suzuki	activist	7.6M	¥2,753	-2.3%	¥464M ($3.0M)
2022-11-10	SELL	Market Buy	グローバル・アルファ・キャピタル・マネージメント・エルティーディー(Global Alpha Capital Management Ltd.) Global Alpha Capital Management Ltd.	passive	7.4M	¥2,340	-14.9%	¥4.6B ($29.7M)

Frequently asked questions

Who has been buying Internet Initiative Japan Inc. stock?: 10 distinct investors have filed 11 disclosed large-shareholding filings in Internet Initiative Japan Inc. (3774), most recently on 2026-05-13. 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 Internet Initiative Japan Inc. have?: Internet Initiative Japan Inc. has 11 buy-side and 8 sell-side disclosures on record, covering ¥130.7B ($843.2M) in total reported value, spanning 2022-11-10 to 2026-05-13.
Where does StockDrifts get Internet Initiative Japan 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 Internet Initiative Japan Inc.. For how StockDrifts scores these disclosures, see the Japan insider signal tier research, or browse every Japanese stock we track.