Who has been buying cotta CO.,LTD stock?

9 distinct investors have filed 12 disclosed large-shareholding filings in cotta CO.,LTD (3359), most recently on 2025-05-02. 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 cotta CO.,LTD have?

cotta CO.,LTD has 12 buy-side and 8 sell-side disclosures on record, covering ¥1.3B ($8.4M) in total reported value, spanning 2022-05-10 to 2025-05-02.

Where does StockDrifts get cotta 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.

cotta CO.,LTD 3359

Company

株式会社cotta(旧名称:株式会社タイセイ)cotta CO.,LTD

Investors

Buys

Total Value

¥1.3B ($8.4M)

Avg Return

+22.00%

Last Filing

2025-05-02

cotta CO.,LTD (3359) has 12 disclosed large-shareholding filings and 8 disclosed disposals on record, filed by 9 distinct investors. Together those filings cover ¥1.3B ($8.4M) in reported transaction value. The earliest filing StockDrifts holds for cotta CO.,LTD is dated 2022-05-10; the most recent is 2025-05-02. 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 +22.00%, 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
2025-05-02	SELL	unknown	不二製油株式会社 FUJI OIL CO., LTD.	other	0	¥383	-39.7%	¥215M ($1.4M)
2024-12-06	BUY	Market Buy	ロングコリドーアセットマネジメントリミテッド(Long Corridor Asset Management Limited) Long Corridor Asset Management Limited	passive	1.8M	¥409	+30.8%	¥736M ($4.7M)
2024-10-02	BUY	unknown	佐藤絵美子 Emiko Sato	unknown	20.0K	¥365	+46.6%	¥7M ($47K)
2024-10-02	BUY	unknown	佐藤嵩大 SATO TAKAHIRO	strategic	610.3K	¥365	+46.6%	¥223M ($1.4M)
2024-10-02	BUY	unknown	佐藤嵩大 SATO TAKAHIRO	strategic	590.3K	¥365	+46.6%	¥215M ($1.4M)
2024-07-30	BUY	negotiated	黒須則彦 Norihiko Kurosu	activist	294.2K	¥431	+24.1%	¥34M ($222K)
2024-07-30	SELL	negotiated	佐藤成一 Seiichi Sato	activist	475.2K	¥431	-24.1%	¥692M ($4.5M)
2024-07-30	BUY	Market Buy	黒須綾希子 Akiko Kurosu	activist	1.1M	¥431	+24.1%	¥40M ($256K)
2024-07-30	BUY	negotiated	黒須綾希子 Akiko Kurosu	activist	1.1M	¥431	+24.1%	¥44M ($284K)
2024-07-30	BUY	Market Buy	黒須則彦 Norihiko Kurosu	activist	294.2K	¥431	+24.1%	¥967K ($6K)
2023-09-20	BUY	negotiated	黒須則彦 Norihiko Kurosu	activist	294.2K	¥537	-0.4%	¥42M ($268K)
2023-09-20	BUY	negotiated	黒須綾希子 Akiko Kurosu	activist	1.1M	¥537	-0.4%	¥5M ($35K)
2023-04-21	BUY	negotiated	黒須則彦 Norihiko Kurosu	activist	214.2K	¥438	+22.1%	¥94M ($605K)
2023-04-21	BUY	Market Buy	黒須則彦 Norihiko Kurosu	activist	214.2K	¥438	+22.1%	¥10M ($63K)
2023-04-21	SELL	negotiated	黒須則彦 Norihiko Kurosu	activist	191.4K	¥438	-22.1%	¥486K ($3K)
2023-04-21	SELL	negotiated	佐藤成一 Seiichi Sato	activist	2.1M	¥438	-22.1%	¥96M ($622K)
2023-04-21	SELL	negotiated	黒須綾希子 Akiko Kurosu	activist	1.1M	¥438	-22.1%	¥2M ($16K)
2023-04-21	BUY	Market Buy	黒須綾希子 Akiko Kurosu	activist	1.1M	¥438	+22.1%	¥2M ($13K)
2023-04-21	BUY	negotiated	黒須綾希子 Akiko Kurosu	activist	1.1M	¥438	+22.1%	¥482M ($3.1M)
2022-12-21	SELL	Market Buy	三井住友DSアセットマネジメント株式会社 Sumitomo Mitsui DS Asset Management Company, Limited	passive	448.8K	¥314	-70.4%	¥64M ($410K)
2022-05-16	SELL	negotiated	児玉佳子 Yoshiko Kodama	activist	145.8K	¥514	-4.1%	¥20M ($129K)
2022-05-16	SELL	negotiated	佐藤成一 Seiichi Sato	activist	2.3M	¥514	-4.1%	¥300M ($1.9M)
2022-05-10	BUY	negotiated	不二製油株式会社 FUJI OIL CO., LTD.	strategic	556.0K	¥535	+0.0%	¥297M ($1.9M)
2022-05-10	BUY	negotiated	不二製油株式会社 FUJI OIL CO., LTD.	strategic	556.0K	¥535	+0.0%	¥297M ($1.9M)

Frequently asked questions

Who has been buying cotta CO.,LTD stock?: 9 distinct investors have filed 12 disclosed large-shareholding filings in cotta CO.,LTD (3359), most recently on 2025-05-02. 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 cotta CO.,LTD have?: cotta CO.,LTD has 12 buy-side and 8 sell-side disclosures on record, covering ¥1.3B ($8.4M) in total reported value, spanning 2022-05-10 to 2025-05-02.
Where does StockDrifts get cotta 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 cotta CO.,LTD. For how StockDrifts scores these disclosures, see the Japan insider signal tier research, or browse every Japanese stock we track.