Who has been buying Taiyo Holdings Co., Ltd. stock?

12 distinct investors have filed 14 disclosed large-shareholding filings in Taiyo Holdings Co., Ltd. (4626), most recently on 2026-05-12. 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 Taiyo Holdings Co., Ltd. have?

Taiyo Holdings Co., Ltd. has 14 buy-side and 27 sell-side disclosures on record, covering ¥9.8B ($63.5M) in total reported value, spanning 2021-04-22 to 2026-05-12.

Where does StockDrifts get Taiyo 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.

Taiyo Holdings Co., Ltd. 4626

Company

太陽ホールディングス株式会社Taiyo Holdings Co., Ltd.

Investors

Buys

Total Value

¥9.8B ($63.5M)

Avg Return

+151.37%

Last Filing

2026-05-12

Taiyo Holdings Co., Ltd. (4626) has 14 disclosed large-shareholding filings and 27 disclosed disposals on record, filed by 12 distinct investors. Together those filings cover ¥9.8B ($63.5M) in reported transaction value. The earliest filing StockDrifts holds for Taiyo Holdings Co., Ltd. is dated 2021-04-22; the most recent is 2026-05-12. 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 +151.37%, 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
2026-05-12	BUY	negotiated	川原敬人	strategic	1.6M	¥4,924	+1.2%	¥7.9B ($51.1M)
2026-05-12	BUY	private	株式会社光和	strategic	7.1M	¥4,924	+1.2%	¥34.8B ($224.5M)
2026-04-07	SELL	unknown	オアシスマネジメントカンパニーリミテッド(Oasis Management Company Ltd.) Oasis Management Company Ltd.	other	17.4M	¥4,730	-1.8%	¥55M ($357K)
2026-04-07	BUY	unknown	オアシスマネジメントカンパニーリミテッド(Oasis Management Company Ltd.) Oasis Management Company Ltd.	other	17.4M	¥4,730	+1.8%	¥55M ($357K)
2026-04-06	SELL	private	株式会社光和 KOWA CORPORATION	strategic	7.1M	¥4,720	-2.1%	¥55M ($356K)
2026-04-01	SELL	unknown	DIC株式会社 DIC Corporation	strategic	22.5M	¥4,700	-2.1%	¥1.4B ($8.9M)
2025-06-20	BUY	Market Buy	オアシスマネジメントカンパニーリミテッド(Oasis Management Company Ltd.) Oasis Management Company Ltd.	activist	8.7M	¥3,210	+49.5%	¥3.5B ($22.8M)
2025-06-20	BUY	Market Buy	オアシスマネジメントカンパニーリミテッド(Oasis Management Company Ltd.) Oasis Management Company Ltd.	activist	7.6M	¥3,210	+49.5%	¥4.6B ($29.4M)
2025-04-01	BUY	Market Buy	オアシスマネジメントカンパニーリミテッド(Oasis Management Company Ltd.) Oasis Management Company Ltd.	activist	6.2M	¥2,397.5	+100.2%	¥3.6B ($23.2M)
2025-02-20	SELL	unknown	野村アセットマネジメント株式会社 Nomura Asset Management Co., Ltd.	other	1.5M	¥2,040	-135.3%	¥95M ($615K)
2025-02-20	SELL	unknown	ノムラインターナショナルピーエルシー NOMURA INTERNATIONAL PLC	other	741.9K	¥2,040	-135.3%	¥1.4B ($9.1M)
2025-02-20	BUY	unknown	野村證券株式会社 Nomura Securities Co.,Ltd.	other	20	¥2,040	+135.3%	¥41K ($263)
2025-02-18	BUY	acquisition	オアシスマネジメントカンパニーリミテッド(Oasis Management Company Ltd.) Oasis Management Company Ltd.	activist	4.7M	¥1,915	+150.7%	¥8.9B ($57.7M)
2025-01-20	BUY	unknown	野村アセットマネジメント株式会社 Nomura Asset Management Co., Ltd.	other	1.5M	¥2,135	+124.8%	¥3.3B ($21.0M)
2025-01-20	BUY	unknown	ノムラインターナショナルピーエルシー NOMURA INTERNATIONAL PLC	other	1.4M	¥2,135	+124.8%	¥3.1B ($19.8M)
2025-01-20	BUY	unknown	野村證券株式会社 Nomura Securities Co.,Ltd.	other	2.4K	¥2,135	+124.8%	¥5M ($32K)
2025-01-16	SELL	unknown	みさき投資株式会社 Misaki Capital Inc.	other	2.4M	¥2,092.5	-129.4%	¥2.5B ($16.2M)
2024-08-20	SELL	unknown	野村アセットマネジメント株式会社 Nomura Asset Management Co., Ltd.	other	2.1M	¥1,767.5	-171.6%	¥196M ($1.3M)
2024-08-20	BUY	unknown	ノムラインターナショナルピーエルシー NOMURA INTERNATIONAL PLC	other	61.7K	¥1,767.5	+171.6%	¥21M ($133K)
2024-08-20	SELL	unknown	野村證券株式会社 Nomura Securities Co.,Ltd.	other	681.4K	¥1,767.5	-171.6%	¥939M ($6.1M)
2024-07-19	SELL	unknown	野村アセットマネジメント株式会社 Nomura Asset Management Co., Ltd.	other	2.2M	¥1,770	-171.2%	¥21M ($133K)
2024-07-19	SELL	unknown	ノムラインターナショナルピーエルシー NOMURA INTERNATIONAL PLC	other	52.7K	¥1,770	-171.2%	¥41M ($267K)
2024-07-19	SELL	unknown	野村證券株式会社 Nomura Securities Co.,Ltd.	other	1.2M	¥1,770	-171.2%	¥1.4B ($9.1M)
2024-05-20	BUY	unknown	野村アセットマネジメント株式会社 Nomura Asset Management Co., Ltd.	other	2.2M	¥1,602.5	+199.5%	¥3.5B ($22.7M)
2024-05-20	BUY	unknown	ノムラインターナショナルピーエルシー NOMURA INTERNATIONAL PLC	other	75.4K	¥1,602.5	+199.5%	¥121M ($780K)
2024-05-20	BUY	unknown	野村證券株式会社 Nomura Securities Co.,Ltd.	other	2.0M	¥1,602.5	+199.5%	¥3.2B ($20.8M)
2024-05-17	SELL	negotiated	株式会社光和 KOWA CORPORATION	strategic	3.5M	¥1,607.5	-198.6%	¥3.6B ($23.5M)
2023-12-25	SELL	unknown	みさき投資株式会社 Misaki Capital Inc.	other	3.6M	¥1,525	-214.8%	¥916M ($5.9M)
2023-09-25	SELL	Market Buy	株式会社三井住友銀行 Sumitomo Mitsui Banking Corporation	other	2.2M	¥1,304	-268.1%	¥8M ($49K)
2023-09-25	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	432.9K	¥1,304	-268.1%	¥783M ($5.1M)
2023-08-21	SELL	unknown	日興アセットマネジメント株式会社 Nikko Asset Management Co.,Ltd.	other	1.1M	¥1,281	-274.7%	¥530M ($3.4M)
2023-08-21	SELL	unknown	三井住友トラスト・アセットマネジメント株式会社 Sumitomo Mitsui Trust Asset Management Co.,Ltd.	other	1.2M	¥1,281	-274.7%	¥261M ($1.7M)
2022-11-21	SELL	unknown	野村アセットマネジメント株式会社 Nomura Asset Management Co., Ltd.	other	1.9M	¥1,277	-275.9%	¥89M ($575K)
2022-11-21	BUY	unknown	ノムラインターナショナルピーエルシー NOMURA INTERNATIONAL PLC	other	52.1K	¥1,277	+275.9%	¥67M ($429K)
2022-11-21	SELL	unknown	野村證券株式会社 Nomura Securities Co.,Ltd.	other	384.3K	¥1,277	-275.9%	¥639M ($4.1M)
2022-08-19	SELL	unknown	野村アセットマネジメント株式会社 Nomura Asset Management Co., Ltd.	other	2.0M	¥1,431	-235.4%	¥133M ($859K)
2022-08-19	SELL	unknown	ノムラインターナショナルピーエルシー NOMURA INTERNATIONAL PLC	other	53.2K	¥1,431	-235.4%	¥58M ($376K)
2022-08-19	SELL	unknown	野村證券株式会社 Nomura Securities Co.,Ltd.	other	882.0K	¥1,431	-235.4%	¥658M ($4.2M)
2022-06-06	BUY	unknown	野村アセットマネジメント株式会社 Nomura Asset Management Co., Ltd.	other	2.1M	¥1,557.5	+208.2%	¥3.3B ($21.1M)
2022-06-06	BUY	unknown	ノムラインターナショナルピーエルシー NOMURA INTERNATIONAL PLC	other	92.0K	¥1,557.5	+208.2%	¥143M ($924K)
2022-06-06	BUY	unknown	野村證券株式会社 Nomura Securities Co.,Ltd.	other	1.3M	¥1,557.5	+208.2%	¥2.1B ($13.5M)
2022-05-19	SELL	negotiated	株式会社光和 KOWA CORPORATION	strategic	5.8M	¥1,560	-207.7%	¥2.6B ($16.5M)
2021-12-08	SELL	unknown	みさき投資株式会社 Misaki Capital Inc.	other	4.2M	¥1,690	-184.0%	¥991M ($6.4M)
2021-09-24	SELL	Market Buy	株式会社三井住友銀行 Sumitomo Mitsui Banking Corporation	other	1.1M	¥1,517.5	-216.3%	¥4M ($28K)
2021-09-24	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	515.2K	¥1,517.5	-216.3%	¥441M ($2.8M)
2021-04-22	BUY	Market Buy	株式会社三井住友銀行 Sumitomo Mitsui Banking Corporation	other	1.1M	¥1,447.5	+231.6%	¥1.6B ($10.4M)
2021-04-22	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	803.2K	¥1,447.5	-231.6%	¥449M ($2.9M)

Frequently asked questions

Who has been buying Taiyo Holdings Co., Ltd. stock?: 12 distinct investors have filed 14 disclosed large-shareholding filings in Taiyo Holdings Co., Ltd. (4626), most recently on 2026-05-12. 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 Taiyo Holdings Co., Ltd. have?: Taiyo Holdings Co., Ltd. has 14 buy-side and 27 sell-side disclosures on record, covering ¥9.8B ($63.5M) in total reported value, spanning 2021-04-22 to 2026-05-12.
Where does StockDrifts get Taiyo 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 Taiyo Holdings Co., Ltd.. For how StockDrifts scores these disclosures, see the Japan insider signal tier research, or browse every Japanese stock we track.