Who has been buying Star seeds Co.,Ltd. stock?

18 distinct investors have filed 27 disclosed large-shareholding filings in Star seeds Co.,Ltd. (3083), 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 Star seeds Co.,Ltd. have?

Star seeds Co.,Ltd. has 27 buy-side and 42 sell-side disclosures on record, covering ¥9.4B ($60.6M) in total reported value, spanning 2021-12-13 to 2026-05-14.

Where does StockDrifts get Star seeds 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.

Star seeds Co.,Ltd. 3083

Company

株式会社シーズメンStar seeds Co.,Ltd.

Investors

Buys

Total Value

¥9.4B ($60.6M)

Avg Return

+33.32%

Last Filing

2026-05-14

Star seeds Co.,Ltd. (3083) has 27 disclosed large-shareholding filings and 42 disclosed disposals on record, filed by 18 distinct investors. Together those filings cover ¥9.4B ($60.6M) in reported transaction value. The earliest filing StockDrifts holds for Star seeds Co.,Ltd. is dated 2021-12-13; 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 +33.32%, 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
2026-07-03	BUY	private	サスティナブルエナジー投資事業有限責任組合無限責任組合員明秀株式会社代表者代表取締役宮城宅矢 Meishu Ltd.	passive	8.6M	¥1,015	-3.9%	¥3.1B ($19.8M)
2026-07-03	BUY	private	サスティナブルエナジー投資事業有限責任組合無限責任組合員明秀株式会社代表者代表取締役宮城宅矢 Meishu Ltd.	passive	8.6M	¥1,015	-3.9%	¥2.8B ($18.0M)
2026-07-02	BUY	private	キャンターフィッツジェラルドヨーロッパ(Cantor Fitzgerald Europe) Cantor Fitzgerald Europe	passive	5.0M	¥991	-1.6%	¥5.0B ($32.0M)
2026-06-26	SELL	subscription	髙桑昌也 TAKAKUWA MASAYA	passive	122.3K	¥995	+3.3%	¥837M ($5.4M)
2026-06-26	SELL	Market Buy	株式会社光輝ENERGY代表者代表取締役村瀬貴保 KOHKI ENERGY Ltd.	passive	652.0K	¥995	+3.3%	¥6M ($39K)
2026-06-12	BUY	Market Buy	株式会社光輝ENERGY代表者代表取締役村瀬貴保 KOHKI ENERGY Ltd.	passive	652.0K	¥992	+0.4%	¥6M ($39K)
2026-06-12	BUY	Market Buy	株式会社光輝ENERGY代表者代表取締役村瀬貴保 KOHKI ENERGY Ltd.	passive	652.0K	¥992	+0.4%	¥6M ($38K)
2026-06-12	BUY	Market Buy	株式会社光輝ENERGY代表者代表取締役村瀬貴保 KOHKI ENERGY Ltd.	passive	652.0K	¥992	+0.4%	¥6M ($38K)
2026-05-21	SELL	Market Buy	髙桑昌也 TAKAKUWA MASAYA	passive	38.6K	¥1,068	+7.1%	¥1.1B ($7.2M)
2026-05-20	BUY	unknown	Maximus合同会社	other	100.0K	¥1,123	-11.7%	¥112M ($725K)
2026-05-20	SELL	unknown	山下卓宏	other	220.0K	¥1,123	+11.7%	¥112M ($722K)
2026-05-20	BUY	unknown	Maximus合同会社	other	100.0K	¥1,123	-11.7%	¥112M ($725K)
2026-05-20	BUY	unknown	山下卓宏	other	220.0K	¥1,123	-11.7%	¥247M ($1.6M)
2026-05-14	BUY	unknown	Maximus合同会社	other	100.0K	¥1,111	-10.0%	¥111M ($717K)
2026-05-14	BUY	unknown	山下卓宏	other	320.0K	¥1,111	-10.0%	¥356M ($2.3M)
2026-05-14	BUY	unknown	Maximus合同会社	other	100.0K	¥1,111	-10.0%	¥111M ($717K)
2026-05-14	BUY	unknown	山下卓宏	other	320.0K	¥1,111	-10.0%	¥356M ($2.3M)
2026-05-11	BUY	unknown	山下卓宏 Takahiro Yamashita	other	320.0K	¥1,150	-13.0%	¥368M ($2.4M)
2026-05-11	BUY	unknown	山下卓宏 Takahiro Yamashita	other	320.0K	¥1,150	-13.0%	¥368M ($2.4M)
2026-04-27	SELL	Market Buy	株式会社 Blue lagoon Blue lagoon Co.,ltd	passive	930.1K	¥1,071	-0.6%	¥2.1B ($13.4M)
2026-04-27	BUY	Market Buy	株式会社 Blue lagoon Blue lagoon Co.,ltd	passive	930.1K	¥1,071	+0.6%	¥412M ($2.7M)
2026-04-07	SELL	subscription	みらい再生支援機構合同会社 Mirai Saisei Shienkikou LLC.	passive	342.6K	¥1,298	+11.3%	¥102M ($660K)
2026-04-02	BUY	Market Buy	株式会社光輝ENERGY代表者代表取締役村瀬貴保 KOHKI ENERGY Ltd.	passive	652.0K	¥1,193	-8.1%	¥7M ($46K)
2026-03-17	SELL	subscription	みらい再生支援機構合同会社 Mirai Saisei Shienkikou LLC.	passive	421.6K	¥995	-7.1%	¥95M ($612K)
2026-03-16	BUY	Market Buy	株式会社光輝ENERGY代表者代表取締役村瀬貴保 KOHKI ENERGY Ltd.	passive	652.0K	¥923	+15.5%	¥6M ($36K)
2026-03-16	BUY	Market Buy	株式会社光輝ENERGY代表者代表取締役村瀬貴保 KOHKI ENERGY Ltd.	passive	652.0K	¥923	+15.5%	¥6M ($36K)
2026-03-12	BUY	subscription	髙桑昌也 TAKAKUWA MASAYA	passive	1.0M	¥882	+20.9%	¥882M ($5.7M)
2026-03-12	SELL	Market Buy	株式会社光輝ENERGY代表者代表取締役村瀬貴保 KOHKI ENERGY Ltd.	passive	652.0K	¥882	-20.9%	¥35M ($229K)
2026-03-12	BUY	subscription	髙桑昌也 TAKAKUWA MASAYA	passive	1.0M	¥882	+20.9%	¥882M ($5.7M)
2026-03-09	BUY	subscription	高桑昌也 TAKAKUWA MASAYA	passive	1.0M	¥784	+36.0%	¥784M ($5.1M)
2026-03-09	BUY	subscription	高桑昌也 TAKAKUWA MASAYA	passive	1.0M	¥784	+36.0%	¥784M ($5.1M)
2026-03-09	BUY	subscription	高桑昌也 TAKAKUWA MASAYA	passive	1.0M	¥784	+36.0%	¥784M ($5.1M)
2026-03-09	BUY	subscription	高桑昌也 TAKAKUWA MASAYA	passive	1.0M	¥784	+36.0%	¥784M ($5.1M)
2026-01-19	SELL	Market Buy	みらい再生支援機構合同会社 Mirai Saisei Shienkikou LLC.	passive	516.6K	¥798	-33.6%	¥283M ($1.8M)
2026-01-07	BUY	Market Buy	株式会社光輝ENERGY代表者代表取締役村瀬貴保 KOHKI ENERGY Ltd.	passive	652.0K	¥813	+31.1%	¥530M ($3.4M)
2025-12-24	BUY	Market Buy	みらい再生支援機構合同会社 Mirai Saisei Shienkikou LLC.	passive	861.6K	¥752	+41.8%	¥67M ($433K)
2025-12-24	SELL	Market Buy	みらい再生支援機構合同会社 Mirai Saisei Shienkikou LLC.	passive	861.6K	¥752	-41.8%	¥67M ($433K)
2025-12-08	BUY	Market Buy	株式会社光輝ENERGY代表者代表取締役村瀬貴保 KOHKI ENERGY Ltd.	passive	652.0K	¥661	+61.3%	¥431M ($2.8M)
2025-12-08	BUY	Market Buy	株式会社光輝ENERGY代表者代表取締役村瀬貴保 KOHKI ENERGY Ltd.	passive	652.0K	¥661	+61.3%	¥431M ($2.8M)
2025-12-08	SELL	Market Buy	サスティナブルエナジー投資事業有限責任組合無限責任組合員明秀株式会社代表者代表取締役宮城宅矢 Meishu Ltd.	passive	1.6M	¥661	-61.3%	¥167M ($1.1M)
2025-12-05	BUY	Market Buy	株式会社光輝ENERGY代表者代表取締役村瀬貴保 KOHKI ENERGY Ltd.	passive	652.0K	¥674	+58.2%	¥152M ($982K)
2025-12-05	BUY	Market Buy	株式会社光輝ENERGY KOHKI ENERGY Ltd.	passive	652.0K	¥674	+58.2%	¥152M ($982K)
2025-12-03	SELL	Market Buy	みらい再生支援機構合同会社 Mirai Saisei Shienkikou LLC.	passive	955.4K	¥687	-55.2%	¥305M ($2.0M)
2025-12-02	BUY	Market Buy	株式会社光輝ENERGY代表者代表取締役村瀬貴保 KOHKI ENERGY Ltd.	passive	400.0K	¥686	+55.4%	¥274M ($1.8M)
2025-12-02	BUY	Market Buy	株式会社光輝ENERGY KOHKI ENERGY Ltd.	passive	400.0K	¥686	+55.4%	¥274M ($1.8M)
2025-12-01	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	300.0K	¥679	+57.0%	¥1.2B ($7.8M)
2025-12-01	SELL	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	300.0K	¥679	-57.0%	¥1.2B ($7.8M)
2025-12-01	SELL	Market Buy	サスティナブルエナジー投資事業有限責任組合無限責任組合員明秀株式会社代表者代表取締役宮城宅矢 Meishu Ltd.	passive	1.9M	¥679	-57.0%	¥157M ($1.0M)
2025-11-07	BUY	Market Buy	サスティナブルエナジー投資事業有限責任組合無限責任組合員明秀株式会社代表者代表取締役宮城宅矢 Meishu Ltd.	passive	2.3M	¥746	+42.9%	¥1.7B ($10.8M)
2025-11-04	BUY	Market Buy	サスティナブルエナジー投資事業有限責任組合無限責任組合員明秀株式会社代表者代表取締役宮城宅矢 Meishu Ltd.	passive	2.3M	¥762	+39.9%	¥275M ($1.8M)

Showing the 50 most recent of 143 filings.

Frequently asked questions

Who has been buying Star seeds Co.,Ltd. stock?: 18 distinct investors have filed 27 disclosed large-shareholding filings in Star seeds Co.,Ltd. (3083), 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 Star seeds Co.,Ltd. have?: Star seeds Co.,Ltd. has 27 buy-side and 42 sell-side disclosures on record, covering ¥9.4B ($60.6M) in total reported value, spanning 2021-12-13 to 2026-05-14.
Where does StockDrifts get Star seeds 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 Star seeds Co.,Ltd.. For how StockDrifts scores these disclosures, see the Japan insider signal tier research, or browse every Japanese stock we track.