Who has been buying No.1 Co.,Ltd stock?

8 distinct investors have filed 10 disclosed large-shareholding filings in No.1 Co.,Ltd (3562), most recently on 2026-05-14. 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 No.1 Co.,Ltd have?

No.1 Co.,Ltd has 10 buy-side and 13 sell-side disclosures on record, covering ¥648M ($4.2M) in total reported value, spanning 2021-07-01 to 2026-05-14.

Where does StockDrifts get No.1 Co.,Ltd 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.

No.1 Co.,Ltd 3562

Company

株式会社No.1No.1 Co.,Ltd

Investors

Buys

Total Value

¥648M ($4.2M)

Avg Return

+50.63%

Last Filing

2026-05-14

No.1 Co.,Ltd (3562) has 10 disclosed large-shareholding filings and 13 disclosed disposals on record, filed by 8 distinct investors. Together those filings cover ¥648M ($4.2M) in reported transaction value. The earliest filing StockDrifts holds for No.1 Co.,Ltd is dated 2021-07-01; the most recent is 2026-05-14. 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 +50.63%, 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	SELL	unknown	古川徳厚	other	135.3K	¥1,562	-1.0%	¥57M ($371K)
2026-07-02	SELL	subscription	グロースパートナーズ株式会社	other	135.3K	¥1,562	-1.0%	¥57M ($371K)
2026-06-03	SELL	unknown	古川徳厚	other	172.8K	¥1,459	-8.3%	¥40M ($258K)
2026-06-03	SELL	subscription	グロースパートナーズ株式会社	other	172.8K	¥1,459	-8.3%	¥40M ($258K)
2026-05-22	SELL	unknown	古川徳厚	other	199.5K	¥1,560	+5.8%	¥16M ($101K)
2026-05-22	SELL	subscription	グロースパートナーズ株式会社	other	199.5K	¥1,560	+5.8%	¥16M ($101K)
2026-05-22	SELL	subscription	グロースパートナーズ株式会社	other	199.5K	¥1,560	+5.8%	¥12M ($79K)
2026-05-22	SELL	unknown	古川徳厚	other	199.5K	¥1,560	+5.8%	¥12M ($79K)
2026-05-14	SELL	unknown	古川徳厚	other	206.3K	¥1,600	+7.8%	¥3M ($22K)
2026-05-14	SELL	subscription	グロースパートナーズ株式会社	other	206.3K	¥1,600	+7.8%	¥3M ($22K)
2026-05-14	SELL	subscription	グロースパートナーズ株式会社	other	206.3K	¥1,600	+7.8%	¥3M ($22K)
2026-05-14	SELL	unknown	古川徳厚	other	206.3K	¥1,600	+7.8%	¥3M ($22K)
2025-12-11	SELL	unknown	辰已崇之 Takayuki Tatsumi	other	1.1M	¥2,323	+28.4%	¥5M ($32K)
2025-08-27	BUY	Market Buy	株式会社HCMAアルファ HCMA Alpha, Inc.	passive	65.4K	¥2,384	-30.2%	¥156M ($1.0M)
2025-08-27	SELL	Market Buy	光通信株式会社 Hikari Tsushin K.K.	passive	235.7K	¥2,384	+30.2%	¥169M ($1.1M)
2025-08-12	BUY	Market Buy	株式会社HCMAアルファ HCMA Alpha, Inc.	passive	65.4K	¥2,398	-30.6%	¥157M ($1.0M)
2025-08-12	SELL	Market Buy	株式会社UH Partners 2 UH Partners 2, Inc.	unknown	0	¥2,398	+30.6%	¥64M ($413K)
2025-08-12	SELL	Market Buy	光通信株式会社 Hikari Tsushin K.K.	passive	306.6K	¥2,398	+30.6%	¥104M ($673K)
2025-08-05	SELL	Market Buy	株式会社HCMAアルファ HCMA Alpha, Inc.	passive	65.4K	¥2,424	+31.4%	¥2M ($11K)
2025-08-05	SELL	Market Buy	株式会社UH Partners 2 UH Partners 2, Inc.	passive	26.5K	¥2,424	+31.4%	¥713M ($4.6M)
2025-08-05	BUY	Market Buy	光通信株式会社 Hikari Tsushin K.K.	passive	350.4K	¥2,424	-31.4%	¥150M ($966K)
2025-02-25	SELL	unknown	辰已崇之 Takayuki Tatsumi	other	1.1M	¥1,955	+14.9%	¥30M ($194K)
2024-06-07	BUY	Market Buy	株式会社HCMAアルファ HCMA Alpha, Inc.	passive	65.4K	¥995	+67.2%	¥65M ($420K)
2024-06-07	BUY	Market Buy	株式会社UH Partners 2 UH Partners 2, Inc.	passive	319.2K	¥995	+67.2%	¥318M ($2.0M)
2024-06-07	BUY	Market Buy	光通信株式会社 Hikari Tsushin K.K.	passive	287.1K	¥995	+67.2%	¥3M ($22K)
2024-06-05	BUY	Market Buy	株式会社HCMAアルファ HCMA Alpha, Inc.	passive	65.4K	¥1,003	+65.9%	¥66M ($423K)
2024-06-05	BUY	Market Buy	光通信株式会社 Hikari Tsushin K.K.	passive	284.0K	¥1,003	+65.9%	¥285M ($1.8M)
2024-05-15	BUY	subscription	古川徳厚 Noritsu Furukawa	other	206.3K	¥997	+66.9%	¥206M ($1.3M)
2024-05-15	BUY	subscription	グロースパートナーズ株式会社 Growth Partners Co., Ltd.	other	206.3K	¥997	+66.9%	¥206M ($1.3M)
2023-08-07	SELL	Market Buy	株式会社SBI証券 SBI SECURITIES Co.,Ltd.	other	107.9K	¥1,176	-41.5%	¥3M ($21K)
2023-08-07	BUY	Market Buy	SBIアセットマネジメント株式会社 SBI Asset Management Co., Ltd.	passive	79.2K	¥1,176	+41.5%	¥89M ($575K)
2023-03-23	BUY	Market Buy	株式会社SBI証券 SBI SECURITIES Co.,Ltd.	other	109.2K	¥1,149	+44.8%	¥125M ($809K)
2023-03-23	BUY	Market Buy	SBIアセットマネジメント株式会社 SBI Asset Management Co., Ltd.	passive	330.0K	¥1,149	+44.8%	¥379M ($2.4M)
2023-03-03	SELL	unknown	辰已崇之 Takayuki Tatsumi	other	1.1M	¥1,255	-32.6%	¥862K ($6K)
2023-02-28	SELL	unknown	辰已崇之 Takayuki Tatsumi	other	1.1M	¥1,218	-36.6%	¥19M ($124K)
2022-01-05	BUY	Market Buy	辰已崇之 Takayuki Tatsumi	other	1.1M	¥958	+73.7%	¥8M ($54K)
2021-07-01	SELL	unknown	辰已崇之 Takayuki Tatsumi	other	1.0M	¥1,298	-28.2%	¥79M ($511K)

Frequently asked questions

Who has been buying No.1 Co.,Ltd stock?: 8 distinct investors have filed 10 disclosed large-shareholding filings in No.1 Co.,Ltd (3562), most recently on 2026-05-14. 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 No.1 Co.,Ltd have?: No.1 Co.,Ltd has 10 buy-side and 13 sell-side disclosures on record, covering ¥648M ($4.2M) in total reported value, spanning 2021-07-01 to 2026-05-14.
Where does StockDrifts get No.1 Co.,Ltd 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 No.1 Co.,Ltd. For how StockDrifts scores these disclosures, see the Japan insider signal tier research, or browse every Japanese stock we track.