Who has been buying Cosmo Energy Holdings Co., Ltd. stock?

32 distinct investors have filed 115 disclosed large-shareholding filings in Cosmo Energy Holdings Co., Ltd. (5021), most recently on 2025-02-18. 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 Cosmo Energy Holdings Co., Ltd. have?

Cosmo Energy Holdings Co., Ltd. has 115 buy-side and 86 sell-side disclosures on record, covering ¥175.9B ($1.1B) in total reported value, spanning 2021-04-21 to 2025-02-18.

Where does StockDrifts get Cosmo Energy Holdings 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.

Cosmo Energy Holdings Co., Ltd. 5021

Company

コスモエネルギーホールディングス株式会社Cosmo Energy Holdings Co., Ltd.

Investors

Buys

115

Total Value

¥175.9B ($1.1B)

Avg Return

+144.98%

Last Filing

2025-02-18

Cosmo Energy Holdings Co., Ltd. (5021) has 115 disclosed large-shareholding filings and 86 disclosed disposals on record, filed by 32 distinct investors. Together those filings cover ¥175.9B ($1.1B) in reported transaction value. The earliest filing StockDrifts holds for Cosmo Energy Holdings Co., Ltd. is dated 2021-04-21; the most recent is 2025-02-18. 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 +144.98%, 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
2025-02-18	SELL	negotiated	株式会社三菱UFJ銀行 Mitsubishi UFJ Financial Group Inc.	strategic	545.7K	¥3,316.5	-28.7%	¥3.4B ($22.1M)
2025-02-18	SELL	negotiated	三菱UFJローンビジネス株式会社 Mitsubishi UFJ Loan Business Co., Ltd.	other	51.9K	¥3,316.5	-28.7%	¥322M ($2.1M)
2025-02-18	BUY	negotiated	三菱UFJモルガン・スタンレー証券株式会社 Mitsubishi UFJ Morgan Stanley Securities Co., Ltd.	other	123.0K	¥3,316.5	+28.7%	¥408M ($2.6M)
2025-02-18	SELL	negotiated	三菱UFJファクター株式会社 Mitsubishi UFJ Factor Co., Ltd.	strategic	51.9K	¥3,316.5	-28.7%	¥322M ($2.1M)
2025-02-18	BUY	negotiated	三菱UFJアセットマネジメント株式会社 Mitsubishi UFJ Financial Group Inc.	passive	706.3K	¥3,316.5	+28.7%	¥147M ($945K)
2025-02-18	SELL	negotiated	三菱UFJ信託銀行株式会社 Mitsubishi UFJ Financial Group Inc.	passive	1.5M	¥3,316.5	-28.7%	¥1.3B ($8.7M)
2024-07-29	BUY	negotiated	株式会社三菱UFJ銀行 Mitsubishi UFJ Financial Group Inc.	strategic	1.6M	¥4,010	+6.4%	¥6.3B ($40.9M)
2024-07-29	BUY	negotiated	三菱UFJローンビジネス株式会社 Mitsubishi UFJ Loan Business Co., Ltd.	strategic	150.0K	¥4,010	+6.4%	¥602M ($3.9M)
2024-07-29	BUY	negotiated	三菱UFJファクター株式会社 Mitsubishi UFJ Factor Co., Ltd.	strategic	150.0K	¥4,010	+6.4%	¥602M ($3.9M)
2024-07-29	SELL	negotiated	三菱UFJアセットマネジメント株式会社 Mitsubishi UFJ Financial Group Inc.	passive	664.6K	¥4,010	-6.4%	¥673M ($4.3M)
2024-07-29	BUY	negotiated	三菱UFJ信託銀行株式会社 Mitsubishi UFJ Financial Group Inc.	passive	1.9M	¥4,010	+6.4%	¥354M ($2.3M)
2024-04-30	BUY	negotiated	三菱UFJローンビジネス株式会社 Mitsubishi UFJ Loan Business Co., Ltd.	strategic	150.0K	¥3,784.5	+12.8%	¥568M ($3.7M)
2024-04-30	SELL	negotiated	三菱UFJモルガン・スタンレー証券株式会社 Mitsubishi UFJ Morgan Stanley Securities Co., Ltd.	other	7.7K	¥3,784.5	-12.8%	¥67M ($431K)
2024-04-30	BUY	negotiated	株式会社三菱UFJ銀行 Mitsubishi UFJ Financial Group Inc.	strategic	1.6M	¥3,784.5	+12.8%	¥6.0B ($38.6M)
2024-04-30	BUY	negotiated	三菱UFJファクター株式会社 Mitsubishi UFJ Factor Co., Ltd.	strategic	150.0K	¥3,784.5	+12.8%	¥568M ($3.7M)
2024-04-30	BUY	negotiated	三菱UFJアセットマネジメント株式会社 Mitsubishi UFJ Financial Group Inc.	passive	828.3K	¥3,784.5	+12.8%	¥67M ($431K)
2024-04-30	BUY	negotiated	三菱UFJ信託銀行株式会社 Mitsubishi UFJ Financial Group Inc.	passive	1.8M	¥3,784.5	+12.8%	¥134M ($863K)
2024-04-15	BUY	negotiated	三菱UFJローンビジネス株式会社 Mitsubishi UFJ Loan Business Co., Ltd.	strategic	150.0K	¥3,971	+7.5%	¥596M ($3.8M)
2024-04-15	BUY	negotiated	株式会社三菱UFJ銀行 Mitsubishi UFJ Financial Group Inc.	strategic	1.6M	¥3,971	+7.5%	¥6.3B ($40.5M)
2024-04-15	BUY	negotiated	三菱UFJモルガン・スタンレー証券株式会社 Mitsubishi UFJ Morgan Stanley Securities Co., Ltd.	other	896.8K	¥3,971	+7.5%	¥3.6B ($23.0M)
2024-04-15	BUY	negotiated	三菱UFJファクター株式会社 Mitsubishi UFJ Factor Co., Ltd.	strategic	150.0K	¥3,971	+7.5%	¥596M ($3.8M)
2024-04-15	SELL	negotiated	三菱UFJアセットマネジメント株式会社 Mitsubishi UFJ Financial Group Inc.	passive	812.5K	¥3,971	-7.5%	¥947M ($6.1M)
2024-04-15	SELL	negotiated	三菱UFJ信託銀行株式会社 Mitsubishi UFJ Financial Group Inc.	passive	1.8M	¥3,971	-7.5%	¥772M ($5.0M)
2023-12-08	BUY	negotiated	関東プロパン瓦斯株式会社 Kanto Propane Gas Co., Ltd.	strategic	375	¥2,761.5	+54.5%	¥1M ($7K)
2023-12-08	SELL	unknown	株式会社南青山不動産 Minami Aoyama Real Estate Co., Ltd.	unknown	0	¥2,761.5	-54.5%	¥166M ($1.1M)
2023-12-08	SELL	unknown	野村絢 Aya Nomura (Murakami family)	unknown	0	¥2,761.5	-54.5%	¥106M ($686K)
2023-12-08	BUY	acquisition	関東プロパン瓦斯株式会社 Kanto Propane Gas Co., Ltd.	strategic	375	¥2,761.5	+54.5%	¥1M ($7K)
2023-12-08	BUY	acquisition	岩谷産業株式会社 IWATANI CORPORATION	strategic	17.5M	¥2,761.5	+54.5%	¥48.2B ($311.1M)
2023-12-08	BUY	unknown	株式会社シティインデックスイレブンス City Index Eleven Co., Ltd.	activist	280.0K	¥2,761.5	+54.5%	¥565M ($3.6M)
2023-12-08	BUY	negotiated	岩谷産業株式会社 IWATANI CORPORATION	strategic	17.5M	¥2,761.5	+54.5%	¥48.2B ($311.1M)
2023-11-22	SELL	unknown	アセットマネジメントOne株式会社 Asset Management One Co., Ltd.	other	1.6M	¥2,903.5	-47.0%	¥1.5B ($9.4M)
2023-11-22	SELL	unknown	みずほ信託銀行株式会社 Mizuho Trust & Banking Co., Ltd.	strategic	100.0K	¥2,903.5	-47.0%	¥26M ($166K)
2023-11-22	SELL	unknown	みずほ証券株式会社 Mizuho Securities Co., Ltd.	other	162.7K	¥2,903.5	-47.0%	¥1.2B ($7.9M)
2023-11-22	SELL	unknown	株式会社みずほ銀行 Mizuho Bank, Ltd.	strategic	1.6M	¥2,903.5	-47.0%	¥180M ($1.2M)
2023-10-16	BUY	negotiated	三菱UFJローンビジネス株式会社 Mitsubishi UFJ Loan Business Co., Ltd.	strategic	150.0K	¥2,647	+61.2%	¥397M ($2.6M)
2023-10-16	BUY	negotiated	三菱UFJファクター株式会社 Mitsubishi UFJ Factor Co., Ltd.	strategic	150.0K	¥2,647	+61.2%	¥397M ($2.6M)
2023-10-16	BUY	negotiated	三菱UFJアセットマネジメント株式会社 Mitsubishi UFJ Financial Group Inc.	passive	1.0M	¥2,647	+61.2%	¥117M ($754K)
2023-10-16	SELL	negotiated	三菱UFJ信託銀行株式会社 Mitsubishi UFJ Financial Group Inc.	passive	2.0M	¥2,647	-61.2%	¥257M ($1.7M)
2023-10-16	BUY	negotiated	株式会社三菱UFJ銀行 Mitsubishi UFJ Financial Group Inc.	strategic	1.6M	¥2,647	+61.2%	¥4.2B ($27.0M)
2023-09-26	BUY	unknown	株式会社南青山不動産 Minami Aoyama Real Estate Co., Ltd.	activist	6.0M	¥2,790.5	+52.9%	¥16.8B ($108.2M)
2023-09-26	BUY	unknown	野村絢 Aya Nomura (Murakami family)	activist	3.9M	¥2,790.5	+52.9%	¥10.8B ($69.4M)
2023-09-26	BUY	unknown	株式会社シティインデックスイレブンス City Index Eleven Co., Ltd.	activist	7.8M	¥2,790.5	+52.9%	¥21.8B ($140.8M)
2023-09-06	BUY	unknown	株式会社南青山不動産 Minami Aoyama Real Estate Co., Ltd.	activist	6.0M	¥2,760	+54.6%	¥16.6B ($107.0M)
2023-09-06	BUY	unknown	野村絢 Aya Nomura (Murakami family)	activist	3.9M	¥2,760	+54.6%	¥10.6B ($68.6M)
2023-09-06	BUY	unknown	株式会社シティインデックスイレブンス City Index Eleven Co., Ltd.	activist	7.8M	¥2,760	+54.6%	¥21.6B ($139.2M)
2023-07-03	BUY	negotiated	株式会社三菱UFJ銀行 Mitsubishi UFJ Financial Group Inc.	strategic	1.6M	¥1,979	+115.6%	¥3.1B ($20.2M)
2023-07-03	BUY	negotiated	三菱UFJ住宅ローン保証株式会社 Mitsubishi UFJ Housing Loan Guarantee Co., Ltd.	strategic	150.0K	¥1,979	+115.6%	¥297M ($1.9M)
2023-07-03	BUY	negotiated	三菱UFJモルガン・スタンレー証券株式会社 Mitsubishi UFJ Morgan Stanley Securities Co., Ltd.	other	48.2K	¥1,979	+115.6%	¥6.7B ($43.2M)
2023-07-03	BUY	negotiated	三菱UFJファクター株式会社 Mitsubishi UFJ Factor Co., Ltd.	strategic	150.0K	¥1,979	+115.6%	¥297M ($1.9M)
2023-07-03	BUY	negotiated	三菱UFJ国際投信株式会社 Mitsubishi UFJ Financial Group Inc.	passive	1.0M	¥1,979	+115.6%	¥490M ($3.2M)

Showing the 50 most recent of 200 filings.

Frequently asked questions

Who has been buying Cosmo Energy Holdings Co., Ltd. stock?: 32 distinct investors have filed 115 disclosed large-shareholding filings in Cosmo Energy Holdings Co., Ltd. (5021), most recently on 2025-02-18. 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 Cosmo Energy Holdings Co., Ltd. have?: Cosmo Energy Holdings Co., Ltd. has 115 buy-side and 86 sell-side disclosures on record, covering ¥175.9B ($1.1B) in total reported value, spanning 2021-04-21 to 2025-02-18.
Where does StockDrifts get Cosmo Energy Holdings 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 Cosmo Energy Holdings Co., Ltd.. For how StockDrifts scores these disclosures, see the Japan insider signal tier research, or browse every Japanese stock we track.