Who has been buying Tokuyama Corporation stock?

15 distinct investors have filed 18 disclosed large-shareholding filings in Tokuyama Corporation (4043), most recently on 2026-04-07. 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 Tokuyama Corporation have?

Tokuyama Corporation has 18 buy-side and 21 sell-side disclosures on record, covering ¥41.1B ($264.9M) in total reported value, spanning 2021-05-21 to 2026-04-07.

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.

Tokuyama Corporation 4043

Company

株式会社トクヤマTokuyama Corporation

Investors

Buys

Total Value

¥41.1B ($264.9M)

Avg Return

+50.64%

Last Filing

2026-04-07

Tokuyama Corporation (4043) has 18 disclosed large-shareholding filings and 21 disclosed disposals on record, filed by 15 distinct investors. Together those filings cover ¥41.1B ($264.9M) in reported transaction value. The earliest filing StockDrifts holds for Tokuyama Corporation is dated 2021-05-21; the most recent is 2026-04-07. Across these filings the average return since disclosure is +50.64%, 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
2026-08-12	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.	passive	3.6M	¥4,040	+4.5%	¥14.6B ($94.2M)
2026-04-07	SELL	Market Buy	三井住友DSアセットマネジメント株式会社	passive	2.4M	¥3,709	-13.9%	¥6.1B ($39.7M)
2026-04-07	SELL	Market Buy	SMBC日興証券株式会社	other	54.2K	¥3,709	-13.9%	¥428M ($2.8M)
2025-12-22	BUY	Market Buy	三井住友DSアセットマネジメント株式会社	passive	4.1M	¥4,156	+1.6%	¥3.4B ($21.6M)
2025-12-22	SELL	Market Buy	株式会社三井住友銀行	other	0	¥4,156	-1.6%	¥1.2B ($7.7M)
2025-12-22	BUY	Market Buy	SMBC日興証券株式会社	other	171.8K	¥4,156	+1.6%	¥300M ($1.9M)
2025-10-22	BUY	Market Buy	SMBC日興証券株式会社 SMBC Nikko Securities Inc.	other	99.3K	¥3,705	+14.0%	¥368M ($2.4M)
2025-10-22	BUY	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	3.3M	¥3,705	+14.0%	¥12.1B ($78.2M)
2025-10-22	BUY	Market Buy	株式会社三井住友銀行 Sumitomo Mitsui Banking Corporation	other	287.7K	¥3,705	+14.0%	¥1.1B ($6.9M)
2025-09-19	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	1.5M	¥3,716	-13.6%	¥2.0B ($12.6M)
2025-09-19	BUY	unknown	三井住友信託銀行株式会社 Sumitomo Mitsui Trust Bank,Limited	other	200.0K	¥3,716	-	-
2025-09-19	SELL	unknown	アモーヴァ・アセットマネジメント株式会社 Amova Asset Management Co., Ltd.	other	1.9M	¥3,716	-13.6%	¥241M ($1.6M)
2025-04-21	BUY	Market Buy	野村證券株式会社 Nomura Securities Co.,Ltd.	other	147.4K	¥2,572	+64.2%	¥1.9B ($12.0M)
2025-04-21	BUY	Market Buy	ノムラインターナショナルピーエルシー NOMURA INTERNATIONAL PLC	other	506.8K	¥2,572	-	¥1.3B ($8.4M)
2025-04-21	BUY	Market Buy	野村アセットマネジメント株式会社 Nomura Asset Management Co., Ltd.	other	4.0M	¥2,572	+64.2%	¥56M ($359K)
2025-04-04	BUY	unknown	野村アセットマネジメント株式会社 Nomura Asset Management Co., Ltd.	other	3.9M	¥2,480	+70.3%	¥9.6B ($62.2M)
2025-04-04	SELL	unknown	ノムラインターナショナルピーエルシー NOMURA INTERNATIONAL PLC	other	50.6K	¥2,480	-70.3%	¥54M ($346K)
2025-04-04	BUY	unknown	野村證券株式会社 Nomura Securities Co.,Ltd.	other	140.1K	¥2,480	+70.3%	¥7.2B ($46.1M)
2024-06-06	BUY	unknown	三井住友信託銀行株式会社 Sumitomo Mitsui Trust Bank,Limited	other	200.0K	¥2,925	-	-
2024-06-06	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	2.0M	¥2,925	-44.4%	¥2.1B ($13.7M)
2024-06-06	BUY	unknown	日興アセットマネジメント株式会社 Nikko Asset Management Co.,Ltd.	other	2.0M	¥2,925	+44.4%	¥63M ($408K)
2024-01-10	BUY	unknown	三井住友信託銀行株式会社 Sumitomo Mitsui Trust Bank,Limited	other	200.0K	¥2,477.5	-	-
2024-01-10	BUY	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	2.8M	¥2,477.5	+70.5%	¥1.8B ($11.6M)
2024-01-10	BUY	unknown	日興アセットマネジメント株式会社 Nikko Asset Management Co.,Ltd.	other	2.0M	¥2,477.5	+70.5%	¥18M ($115K)
2022-11-21	BUY	unknown	野村アセットマネジメント株式会社 Nomura Asset Management Co., Ltd.	other	4.3M	¥1,839	+129.6%	¥7.7B ($50.0M)
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	73.1K	¥1,839	-	¥134M ($867K)
2022-11-21	SELL	unknown	野村證券株式会社 Nomura Securities Co.,Ltd.	other	109.6K	¥1,839	-129.6%	¥358M ($2.3M)
2022-06-21	BUY	unknown	三井住友信託銀行株式会社 Sumitomo Mitsui Trust Bank,Limited	other	200.0K	¥1,755	-	-
2022-06-21	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	2.0M	¥1,755	-140.6%	¥354M ($2.3M)
2022-06-21	SELL	unknown	日興アセットマネジメント株式会社 Nikko Asset Management Co.,Ltd.	other	2.0M	¥1,755	-140.6%	¥25M ($163K)
2022-04-21	SELL	unknown	三井住友信託銀行株式会社 Sumitomo Mitsui Trust Bank,Limited	other	200.0K	¥1,694	-149.3%	¥12M ($79K)
2022-04-21	SELL	Market Buy	野村證券株式会社 Nomura Securities Co.,Ltd.	other	301.2K	¥1,694	-149.3%	¥5.6B ($36.1M)
2022-04-21	SELL	Market Buy	ノムラインターナショナルピーエルシー NOMURA INTERNATIONAL PLC	other	63.3K	¥1,694	-149.3%	¥1.1B ($6.8M)
2022-04-21	BUY	Market Buy	野村アセットマネジメント株式会社 Nomura Asset Management Co., Ltd.	other	4.9M	¥1,694	+149.3%	¥110M ($709K)
2022-04-21	SELL	unknown	日興アセットマネジメント株式会社 Nikko Asset Management Co.,Ltd.	other	2.0M	¥1,694	-149.3%	¥769M ($5.0M)
2022-04-21	BUY	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	2.2M	¥1,694	+149.3%	¥867M ($5.6M)
2021-10-18	SELL	unknown	株式会社三菱UFJ銀行 Mitsubishi UFJ Financial Group Inc.	unknown	0	¥2,109	-100.2%	¥1.5B ($9.9M)
2021-10-18	SELL	unknown	三菱UFJ信託銀行株式会社 Mitsubishi UFJ Financial Group Inc.	passive	2.4M	¥2,109	-100.2%	¥912M ($5.9M)
2021-10-18	SELL	unknown	三菱UFJ国際投信株式会社 Mitsubishi UFJ Financial Group Inc.	passive	790.5K	¥2,109	-100.2%	¥502M ($3.2M)
2021-10-18	BUY	unknown	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	436.0K	¥2,109	-	¥919M ($5.9M)
2021-09-22	SELL	Market Buy	ノムラインターナショナルピーエルシー NOMURA INTERNATIONAL PLC	other	683.1K	¥2,183	-93.5%	¥661M ($4.3M)
2021-09-22	BUY	Market Buy	野村アセットマネジメント株式会社 Nomura Asset Management Co., Ltd.	other	4.8M	¥2,183	+93.5%	¥551M ($3.6M)
2021-09-22	BUY	Market Buy	野村證券株式会社 Nomura Securities Co.,Ltd.	other	34.9K	¥2,183	+93.5%	¥4.7B ($30.5M)
2021-06-03	BUY	unknown	野村證券株式会社 Nomura Securities Co.,Ltd.	other	10.9K	¥2,327	-	¥25M ($164K)
2021-06-03	SELL	unknown	野村ホールディングス株式会社 Nomura Holdings, Inc.	unknown	0	¥2,327	-81.5%	¥235M ($1.5M)
2021-06-03	BUY	unknown	ノムラインターナショナルピーエルシー NOMURA INTERNATIONAL PLC	other	985.9K	¥2,327	+81.5%	¥1.5B ($9.5M)
2021-06-03	SELL	unknown	野村アセットマネジメント株式会社 Nomura Asset Management Co., Ltd.	other	4.6M	¥2,327	-81.5%	¥50M ($325K)
2021-05-21	SELL	unknown	アセットマネジメントOne株式会社 Asset Management One Co., Ltd.	other	2.8M	¥2,351	-79.6%	¥1.8B ($11.7M)

Frequently asked questions

Who has been buying Tokuyama Corporation stock?: 15 distinct investors have filed 18 disclosed large-shareholding filings in Tokuyama Corporation (4043), most recently on 2026-04-07. 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 Tokuyama Corporation have?: Tokuyama Corporation has 18 buy-side and 21 sell-side disclosures on record, covering ¥41.1B ($264.9M) in total reported value, spanning 2021-05-21 to 2026-04-07.
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.

More on this data

Every trade listed above comes from an official regulatory disclosure. For how StockDrifts scores these disclosures, see the Japan insider signal tier research, or browse every Japanese stock we track.