Who has been buying Alpha Group Inc. stock?

9 distinct investors have filed 5 disclosed large-shareholding filings in Alpha Group Inc. (3322), most recently on 2024-12-26. 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 Alpha Group Inc. have?

Alpha Group Inc. has 5 buy-side and 10 sell-side disclosures on record, covering ¥1.7B ($10.9M) in total reported value, spanning 2021-03-31 to 2024-12-26.

Where does StockDrifts get Alpha Group 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.

Alpha Group Inc. 3322

Company

アルファグループ株式会社Alpha Group Inc.

Investors

Buys

Total Value

¥1.7B ($10.9M)

Avg Return

+30.95%

Last Filing

2024-12-26

Alpha Group Inc. (3322) has 5 disclosed large-shareholding filings and 10 disclosed disposals on record, filed by 9 distinct investors. Together those filings cover ¥1.7B ($10.9M) in reported transaction value. The earliest filing StockDrifts holds for Alpha Group Inc. is dated 2021-03-31; the most recent is 2024-12-26. 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 +30.95%, 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
2024-12-26	SELL	Market Buy	株式会社キャピタルギャラリー Capital Gallery	passive	235.2K	¥884.03	-0.8%	¥267M ($1.7M)
2024-12-26	SELL	Market Buy	青山浩 Hiroshi Aoyama	passive	0	¥884.03	-0.8%	¥35M ($226K)
2024-07-11	SELL	Market Buy	株式会社エスアイエル SIL Co., Ltd.	unknown	0	¥621.02	-43.5%	¥6M ($39K)
2024-07-11	BUY	Market Buy	光通信株式会社 Hikari Tsushin K.K.	passive	341.8K	¥621.02	+43.5%	¥210M ($1.4M)
2024-03-01	BUY	negotiated	株式会社エクステンド Extend Co., Ltd.	passive	2.4M	¥649.02	+37.3%	¥1.6B ($10.1M)
2024-03-01	BUY	negotiated	吉岡伸一郎 Shinichiro Yoshioka	activist	161.2K	¥649.02	+37.3%	¥105M ($675K)
2023-12-06	BUY	Market Buy	光通信株式会社 Hikari Tsushin K.K.	passive	402.2K	¥567.02	+57.1%	¥228M ($1.5M)
2023-12-06	SELL	Market Buy	株式会社エスアイエル SIL Co., Ltd.	passive	9.4K	¥567.02	-57.1%	¥39M ($255K)
2023-09-14	BUY	negotiated	株式会社エクステンド Extend Co., Ltd.	passive	2.4M	¥656.02	+35.8%	¥1.1B ($7.0M)
2023-09-14	SELL	negotiated	吉岡伸一郎 Shinichiro Yoshioka	activist	161.2K	¥656.02	-35.8%	¥1.1B ($7.0M)
2023-09-07	SELL	Market Buy	株式会社エスアイエル SIL Co., Ltd.	passive	79.7K	¥643.02	-38.6%	¥36M ($234K)
2023-09-07	SELL	Market Buy	光通信株式会社 Hikari Tsushin K.K.	passive	402.2K	¥643.02	-38.6%	¥10M ($66K)
2023-09-05	SELL	unknown	兼松コミュニケーションズ株式会社 KANEMATSU COMMUNICATIONS LTD.	other	0	¥647.02	-37.7%	¥538M ($3.5M)
2023-08-10	BUY	Market Buy	株式会社エクステンド Extend Co., Ltd.	passive	757.6K	¥695.03	+28.2%	¥527M ($3.4M)
2023-08-10	BUY	Market Buy	吉岡伸一郎 Shinichiro Yoshioka	activist	1.8M	¥695.03	+28.2%	¥82M ($531K)
2022-08-02	BUY	negotiated	株式会社エクステンド Extend Co., Ltd.	passive	757.6K	¥710.03	+25.5%	¥538M ($3.5M)
2022-08-02	BUY	negotiated	吉岡伸一郎 Shinichiro Yoshioka	activist	1.7M	¥710.03	+25.5%	¥1.2B ($7.8M)
2022-01-18	BUY	Market Buy	株式会社エスアイエル SIL Co., Ltd.	passive	135.9K	¥735.03	+21.2%	¥100M ($644K)
2022-01-18	BUY	Market Buy	光通信株式会社 Hikari Tsushin K.K.	passive	418.3K	¥735.03	+21.2%	¥303M ($2.0M)
2021-11-29	BUY	Market Buy	光通信株式会社 Hikari Tsushin K.K.	passive	559.2K	¥708.03	+25.8%	¥396M ($2.6M)
2021-07-26	BUY	negotiated	株式会社エクステンド Extend Co., Ltd.	passive	757.6K	¥718.03	+24.1%	¥544M ($3.5M)
2021-07-26	BUY	negotiated	吉岡伸一郎 Shinichiro Yoshioka	activist	1.7M	¥718.03	+24.1%	¥1.2B ($7.9M)
2021-06-01	BUY	negotiated	株式会社エクステンド Extend Co., Ltd.	passive	757.6K	¥745.03	+19.6%	¥564M ($3.6M)
2021-06-01	BUY	negotiated	吉岡伸一郎 Shinichiro Yoshioka	activist	1.7M	¥745.03	+19.6%	¥1.3B ($8.2M)
2021-03-31	SELL	Market Buy	株式会社光通信 HIKARI TSUSHIN, Inc.	unknown	0	¥707.03	-26.0%	¥148M ($953K)
2021-03-31	BUY	Market Buy	光通信株式会社 Hikari Tsushin K.K.	passive	559.2K	¥707.03	+26.0%	¥16M ($102K)
2021-03-31	SELL	Market Buy	株式会社ブロードピーク Broadpeak Co., Ltd.	unknown	0	¥707.03	-26.0%	¥26M ($168K)

Frequently asked questions

Who has been buying Alpha Group Inc. stock?: 9 distinct investors have filed 5 disclosed large-shareholding filings in Alpha Group Inc. (3322), most recently on 2024-12-26. 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 Alpha Group Inc. have?: Alpha Group Inc. has 5 buy-side and 10 sell-side disclosures on record, covering ¥1.7B ($10.9M) in total reported value, spanning 2021-03-31 to 2024-12-26.
Where does StockDrifts get Alpha Group 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 Alpha Group Inc.. For how StockDrifts scores these disclosures, see the Japan insider signal tier research, or browse every Japanese stock we track.