Who has been buying GMO Internet, Inc. stock?

6 distinct investors have filed 17 disclosed large-shareholding filings in GMO Internet, Inc. (9449), most recently on 2026-03-02. 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 GMO Internet, Inc. have?

GMO Internet, Inc. has 17 buy-side and 14 sell-side disclosures on record, covering ¥151.5B ($977.2M) in total reported value, spanning 2021-10-06 to 2026-03-02.

Where does StockDrifts get GMO Internet, 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.

GMO Internet, Inc. 9449

Company

GMOインターネット株式会社GMO Internet, Inc.

Investors

Buys

Total Value

¥151.5B ($977.2M)

Avg Return

+18.99%

Last Filing

2026-03-02

GMO Internet, Inc. (9449) has 17 disclosed large-shareholding filings and 14 disclosed disposals on record, filed by 6 distinct investors. Together those filings cover ¥151.5B ($977.2M) in reported transaction value. The earliest filing StockDrifts holds for GMO Internet, Inc. is dated 2021-10-06; the most recent is 2026-03-02. 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 +18.99%, 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
2026-07-01	BUY	Market Buy	熊谷正寿	activist	9.0M	¥3,370	+26.2%	¥289M ($1.9M)
2026-07-01	BUY	Market Buy	株式会社熊谷正寿事務所	activist	35.7M	¥3,370	+26.2%	¥1.0B ($6.5M)
2026-07-01	BUY	negotiated	熊谷正寿	activist	9.0M	¥3,370	+26.2%	¥30.3B ($195.5M)
2026-07-01	BUY	negotiated	株式会社熊谷正寿事務所	activist	35.7M	¥3,370	+26.2%	¥120.4B ($776.5M)
2026-03-02	BUY	negotiated	齋藤薫	strategic	70.0K	¥2,939	-10.1%	¥227M ($1.5M)
2026-03-02	BUY	negotiated	熊谷正寿	activist	9.0M	¥2,939	+10.1%	¥29.1B ($187.7M)
2026-03-02	BUY	negotiated	株式会社熊谷正寿事務所	activist	35.7M	¥2,939	+10.1%	¥115.6B ($745.7M)
2026-03-02	BUY	Market Buy	齋藤薫	strategic	70.0K	¥2,939	-10.1%	¥227M ($1.5M)
2026-03-02	BUY	Market Buy	熊谷正寿	activist	9.0M	¥2,939	+10.1%	¥29.1B ($187.7M)
2026-03-02	BUY	Market Buy	株式会社熊谷正寿事務所	activist	35.7M	¥2,939	+10.1%	¥115.6B ($745.7M)
2026-02-19	SELL	unknown	ベイリー・ギフォード・オーバーシーズ・リミテッド Baillie Gifford Overseas Limited	other	1.1M	¥3,057	-5.9%	¥3.5B ($22.7M)
2026-02-19	SELL	unknown	ベイリー・ギフォード・アンド・カンパニー Baillie Gifford & Co	other	4.2M	¥3,057	-5.9%	¥13.7B ($88.6M)
2025-05-21	SELL	unknown	ベイリー・ギフォード・オーバーシーズ・リミテッド Baillie Gifford Overseas Limited	other	2.3M	¥3,487	+7.2%	¥1.3B ($8.5M)
2025-05-21	SELL	unknown	ベイリー・ギフォード・アンド・カンパニー Baillie Gifford & Co	other	5.2M	¥3,487	+7.2%	¥2.5B ($16.3M)
2024-11-21	SELL	unknown	ベイリー・ギフォード・オーバーシーズ・リミテッド Baillie Gifford Overseas Limited	other	2.7M	¥2,529.5	-27.9%	¥2.3B ($15.1M)
2024-11-21	SELL	unknown	ベイリー・ギフォード・アンド・カンパニー Baillie Gifford & Co	other	6.0M	¥2,529.5	-27.9%	¥1.8B ($11.4M)
2024-11-08	BUY	Market Buy	オービス・インベストメント・マネジメント・リミテッド(Orbis Investment Management Limited) Orbis Investment Management Limited	other	10.9M	¥2,675.5	+20.9%	¥3.0B ($19.6M)
2024-08-30	BUY	negotiated	齋藤薫 Kaoru Saito	strategic	70.0K	¥2,516.5	+28.6%	¥176M ($1.1M)
2024-08-30	BUY	negotiated	熊谷正寿 Masatoshi Kumagai	activist	9.0M	¥2,516.5	+28.6%	¥22.6B ($146.0M)
2024-08-30	BUY	negotiated	株式会社熊谷正寿事務所 Kumagai Masatoshi Office, Ltd.	activist	35.7M	¥2,516.5	+28.6%	¥89.9B ($579.9M)
2024-08-05	SELL	unknown	ベイリー・ギフォード・オーバーシーズ・リミテッド Baillie Gifford Overseas Limited	other	3.6M	¥1,888	-71.4%	¥1.6B ($10.5M)
2024-08-05	SELL	unknown	ベイリー・ギフォード・アンド・カンパニー Baillie Gifford & Co	other	6.7M	¥1,888	-71.4%	¥989M ($6.4M)
2024-06-21	BUY	Market Buy	オービス・インベストメント・マネジメント・リミテッド(Orbis Investment Management Limited) Orbis Investment Management Limited	other	9.7M	¥2,421.5	+33.6%	¥3.8B ($24.7M)
2024-05-22	BUY	Market Buy	オービス・インベストメント・マネジメント・リミテッド(Orbis Investment Management Limited) Orbis Investment Management Limited	other	8.1M	¥2,579.5	+25.4%	¥3.5B ($22.3M)
2024-04-18	BUY	Market Buy	齋藤薫 Kaoru Saito	strategic	70.0K	¥2,636	+22.8%	¥185M ($1.2M)
2024-04-18	BUY	Market Buy	熊谷正寿 Masatoshi Kumagai	activist	9.0M	¥2,636	+22.8%	¥201M ($1.3M)
2024-04-18	BUY	Market Buy	株式会社熊谷正寿事務所 Kumagai Masatoshi Office, Ltd.	activist	35.7M	¥2,636	+22.8%	¥777M ($5.0M)
2024-04-17	SELL	unknown	ベイリー・ギフォード・オーバーシーズ・リミテッド Baillie Gifford Overseas Limited	other	4.5M	¥2,596.5	-24.6%	¥2.2B ($14.4M)
2024-04-17	SELL	unknown	ベイリー・ギフォード・アンド・カンパニー Baillie Gifford & Co	other	7.2M	¥2,596.5	-24.6%	¥652M ($4.2M)
2024-03-07	BUY	Market Buy	オービス・インベストメント・マネジメント・リミテッド(Orbis Investment Management Limited) Orbis Investment Management Limited	other	6.9M	¥2,891.5	+11.9%	¥3.9B ($25.1M)
2024-02-14	SELL	unknown	ベイリー・ギフォード・オーバーシーズ・リミテッド Baillie Gifford Overseas Limited	other	5.4M	¥2,629.5	-23.1%	¥318M ($2.1M)
2024-02-14	SELL	unknown	ベイリー・ギフォード・アンド・カンパニー Baillie Gifford & Co	other	7.5M	¥2,629.5	-23.1%	¥2.6B ($16.6M)
2024-02-05	BUY	Market Buy	株式会社熊谷正寿事務所 Kumagai Masatoshi Office, Ltd.	activist	35.7M	¥2,676	+20.9%	¥1.5B ($9.9M)
2024-02-05	BUY	Market Buy	齋藤薫 Kaoru Saito	strategic	70.0K	¥2,676	+20.9%	¥187M ($1.2M)
2024-02-05	BUY	Market Buy	熊谷正寿 Masatoshi Kumagai	activist	9.0M	¥2,676	+20.9%	¥383M ($2.5M)
2023-12-22	BUY	unknown	オービス・インベストメント・マネジメント・リミテッド(Orbis Investment Management Limited) Orbis Investment Management Limited	other	5.5M	¥2,484.5	+30.3%	¥13.7B ($88.4M)
2023-06-26	SELL	unknown	ベイリー・ギフォード・オーバーシーズ・リミテッド Baillie Gifford Overseas Limited	other	5.5M	¥2,788	-16.1%	¥3.6B ($23.0M)
2023-06-26	SELL	unknown	ベイリー・ギフォード・アンド・カンパニー Baillie Gifford & Co	other	8.5M	¥2,788	-16.1%	¥307M ($2.0M)
2021-10-06	BUY	negotiated	齋藤薫 Kaoru Saito	strategic	70.0K	¥2,738	+18.2%	¥192M ($1.2M)
2021-10-06	BUY	negotiated	株式会社熊谷正寿事務所 Kumagai Masatoshi Office, Ltd.	activist	35.7M	¥2,738	+18.2%	¥97.8B ($630.9M)
2021-10-06	BUY	negotiated	齋藤薫 Kaoru Saito	strategic	70.0K	¥2,738	+18.2%	¥192M ($1.2M)
2021-10-06	BUY	negotiated	株式会社熊谷正寿事務所 Kumagai Masatoshi Office, Ltd.	activist	35.7M	¥2,738	+18.2%	¥97.8B ($630.9M)
2021-10-06	BUY	negotiated	齋藤薫 Kaoru Saito	strategic	70.0K	¥2,738	+18.2%	¥192M ($1.2M)
2021-10-06	BUY	negotiated	株式会社熊谷正寿事務所 Kumagai Masatoshi Office, Ltd.	activist	35.7M	¥2,738	+18.2%	¥1.2B ($7.5M)
2021-10-06	BUY	negotiated	齋藤薫 Kaoru Saito	strategic	70.0K	¥2,738	+18.2%	¥192M ($1.2M)
2021-10-06	BUY	negotiated	株式会社熊谷正寿事務所 Kumagai Masatoshi Office, Ltd.	activist	35.7M	¥2,738	+18.2%	¥97.8B ($630.9M)
2021-10-06	BUY	negotiated	齋藤薫 Kaoru Saito	strategic	70.0K	¥2,738	+18.2%	¥192M ($1.2M)
2021-10-06	BUY	negotiated	株式会社熊谷正寿事務所 Kumagai Masatoshi Office, Ltd.	activist	35.7M	¥2,738	+18.2%	¥97.8B ($630.9M)
2021-10-06	BUY	Market Buy	齋藤薫 Kaoru Saito	strategic	70.0K	¥2,738	+18.2%	¥192M ($1.2M)
2021-10-06	BUY	Market Buy	株式会社熊谷正寿事務所 Kumagai Masatoshi Office, Ltd.	activist	35.7M	¥2,738	+18.2%	¥1.2B ($7.5M)

Showing the 50 most recent of 56 filings.

Frequently asked questions

Who has been buying GMO Internet, Inc. stock?: 6 distinct investors have filed 17 disclosed large-shareholding filings in GMO Internet, Inc. (9449), most recently on 2026-03-02. 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 GMO Internet, Inc. have?: GMO Internet, Inc. has 17 buy-side and 14 sell-side disclosures on record, covering ¥151.5B ($977.2M) in total reported value, spanning 2021-10-06 to 2026-03-02.
Where does StockDrifts get GMO Internet, 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 GMO Internet, Inc.. For how StockDrifts scores these disclosures, see the Japan insider signal tier research, or browse every Japanese stock we track.