Who has been buying Tri Chemical Laboratories Inc. stock?

16 distinct investors have filed 70 disclosed large-shareholding filings in Tri Chemical Laboratories Inc. (4369), most recently on 2026-05-13. 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 Tri Chemical Laboratories Inc. have?

Tri Chemical Laboratories Inc. has 70 buy-side and 48 sell-side disclosures on record, covering ¥133.9B ($864.1M) in total reported value, spanning 2021-06-22 to 2026-05-13.

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.

Tri Chemical Laboratories Inc. 4369

Company

株式会社トリケミカル研究所Tri Chemical Laboratories Inc.

Investors

Buys

Total Value

¥133.9B ($864.1M)

Avg Return

+2.49%

Last Filing

2026-05-13

Tri Chemical Laboratories Inc. (4369) has 70 disclosed large-shareholding filings and 48 disclosed disposals on record, filed by 16 distinct investors. Together those filings cover ¥133.9B ($864.1M) in reported transaction value. The earliest filing StockDrifts holds for Tri Chemical Laboratories Inc. is dated 2021-06-22; the most recent is 2026-05-13. Across these filings the average return since disclosure is +2.49%, 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
2026-08-28	SELL	unknown	野村アセットマネジメント株式会社	other	3.2M	¥3,135	+4.6%	¥234M ($1.5M)
2026-08-28	BUY	Market Buy	野村證券株式会社	other	150.8K	¥3,135	-4.6%	¥194M ($1.2M)
2026-08-20	BUY	Market Buy	野村證券株式会社	other	87.7K	¥3,225	-7.2%	¥231M ($1.5M)
2026-08-20	BUY	Market Buy	野村アセットマネジメント株式会社	other	3.3M	¥3,225	-7.2%	¥10M ($68K)
2026-08-20	SELL	unknown	ノムラインターナショナルピーエルシー NOMURA INTERNATIONAL PLC	other	23.0K	¥3,225	+7.2%	¥115M ($744K)
2026-08-10	SELL	unknown	野村證券株式会社	other	15.9K	¥3,335	+10.3%	¥98M ($629K)
2026-08-10	SELL	unknown	ノムラインターナショナルピーエルシー NOMURA INTERNATIONAL PLC	other	60.1K	¥3,335	+10.3%	¥715M ($4.6M)
2026-08-10	BUY	Market Buy	野村アセットマネジメント株式会社	other	3.3M	¥3,335	-10.3%	¥271M ($1.7M)
2026-08-05	BUY	Market Buy	ウエリントン・マネージメント・ジャパン・ピーティーイー・リミテッド Wellington Management Japan Pte Ltd	other	2.5M	¥3,670	-18.5%	¥1.8B ($11.7M)
2026-08-05	BUY	Market Buy	ウエリントン・マネージメント・シンガポール・ピーティーイー・リミテッド Wellington Management Singapore Pte. Ltd.	other	368.1K	¥3,670	-18.5%	¥12M ($77K)
2026-07-22	BUY	unknown	野村證券株式会社	other	44.7K	¥3,340	-	-
2026-07-22	SELL	unknown	ノムラインターナショナルピーエルシー NOMURA INTERNATIONAL PLC	other	274.1K	¥3,340	+10.4%	¥814M ($5.3M)
2026-07-22	BUY	unknown	野村アセットマネジメント株式会社	other	3.2M	¥3,340	-	-
2026-07-21	BUY	Market Buy	ウエリントン・マネージメント・ジャパン・ピーティーイー・リミテッド Wellington Management Japan Pte Ltd	other	2.0M	¥3,275	-8.6%	¥1.3B ($8.6M)
2026-07-21	BUY	Market Buy	ウエリントン・マネージメント・シンガポール・ピーティーイー・リミテッド Wellington Management Singapore Pte. Ltd.	other	362.4K	¥3,275	-8.6%	¥319M ($2.1M)
2026-07-10	BUY	Market Buy	野村證券株式会社	other	44.6K	¥3,325	-10.0%	¥54M ($349K)
2026-07-10	SELL	unknown	ノムラインターナショナルピーエルシー NOMURA INTERNATIONAL PLC	other	518.1K	¥3,325	+10.0%	¥1.2B ($7.8M)
2026-07-10	BUY	Market Buy	野村アセットマネジメント株式会社	other	3.2M	¥3,325	-10.0%	¥22M ($139K)
2026-07-06	SELL	unknown	三井住友トラスト・アセットマネジメント株式会社	other	927.0K	¥3,440	+13.0%	¥973M ($6.3M)
2026-07-06	BUY	unknown	アモーヴァ・アセットマネジメント株式会社	other	485.7K	¥3,440	-	-
2026-06-23	SELL	unknown	野村證券株式会社	other	30.7K	¥3,680	+18.7%	¥1.0B ($6.7M)
2026-06-23	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	882.1K	¥3,680	-18.7%	¥1.2B ($7.9M)
2026-06-23	BUY	Market Buy	野村アセットマネジメント株式会社	other	3.2M	¥3,680	-18.7%	¥12M ($77K)
2026-06-16	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	544.9K	¥3,765	-20.5%	¥147M ($947K)
2026-06-16	BUY	unknown	野村アセットマネジメント株式会社	other	3.2M	¥3,765	-	-
2026-06-16	BUY	Market Buy	野村證券株式会社	other	312.1K	¥3,765	-20.5%	¥1.1B ($6.8M)
2026-06-15	BUY	Market Buy	野村證券株式会社	other	32.2K	¥3,800	-21.3%	¥25M ($159K)
2026-06-15	SELL	unknown	ノムラインターナショナルピーエルシー NOMURA INTERNATIONAL PLC	other	506.6K	¥3,800	+21.3%	¥1.2B ($7.8M)
2026-06-15	SELL	unknown	野村アセットマネジメント株式会社	other	3.2M	¥3,800	+21.3%	¥99M ($637K)
2026-06-04	SELL	unknown	三井住友トラスト・アセットマネジメント株式会社	other	1.2M	¥4,105	+27.1%	¥987M ($6.4M)
2026-06-04	SELL	unknown	アモーヴァ・アセットマネジメント株式会社	other	485.6K	¥4,105	+27.1%	¥400M ($2.6M)
2026-05-29	SELL	unknown	野村證券株式会社	other	25.9K	¥3,770	+20.6%	¥12M ($79K)
2026-05-29	SELL	unknown	ノムラインターナショナルピーエルシー NOMURA INTERNATIONAL PLC	other	826.5K	¥3,770	+20.6%	¥25M ($158K)
2026-05-29	BUY	unknown	ノムラセキュリテーズインターナショナル NOMURA SECURITIES INTERNATIONAL,Inc.	unknown	0	¥3,770	-	-
2026-05-29	BUY	Market Buy	野村アセットマネジメント株式会社	other	3.2M	¥3,770	-20.6%	¥821M ($5.3M)
2026-05-21	SELL	negotiated	竹中潤平 Jumpei Takenaka	activist	3.5M	¥3,335	+10.3%	¥1.1B ($7.3M)
2026-05-20	BUY	unknown	ウエリントン・マネージメント・ジャパン・ピーティーイー・リミテッド Wellington Management Japan Pte Ltd	other	1.6M	¥3,255	-8.1%	¥5.1B ($33.0M)
2026-05-20	BUY	unknown	ウエリントン・マネージメント・シンガポール・ピーティーイー・リミテッド Wellington Management Singapore Pte. Ltd.	other	267.9K	¥3,255	-8.1%	¥872M ($5.6M)
2026-05-13	SELL	negotiated	竹中潤平 Jumpei Takenaka	activist	3.8M	¥3,510	+14.8%	¥1.3B ($8.2M)
2026-05-12	SELL	unknown	みずほ証券株式会社	other	21.0K	¥3,485	+14.2%	¥136M ($877K)
2026-05-12	SELL	unknown	アセットマネジメントOne株式会社	other	1.3M	¥3,485	+14.2%	¥1.1B ($7.0M)
2026-05-08	SELL	Market Buy	三菱UFJ信託銀行株式会社	passive	729.3K	¥3,330	+10.2%	¥1.0B ($6.8M)
2026-05-08	BUY	Market Buy	三菱UFJアセットマネジメント株式会社	passive	866.1K	¥3,330	-	-
2026-05-08	SELL	unknown	三菱UFJモルガン・スタンレー証券株式会社	other	2.9K	¥3,330	+10.2%	¥260M ($1.7M)
2026-04-20	BUY	Market Buy	野村證券株式会社	other	27.8K	¥3,110	-3.8%	¥91M ($587K)
2026-04-20	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	833.1K	¥3,110	-3.8%	¥293M ($1.9M)
2026-04-20	BUY	Market Buy	ノムラセキュリテーズインターナショナル NOMURA SECURITIES INTERNATIONAL,Inc.	other	0	¥3,110	-	-
2026-04-20	BUY	Market Buy	野村アセットマネジメント株式会社	other	3.0M	¥3,110	-3.8%	¥10M ($65K)
2026-04-09	SELL	unknown	野村證券株式会社	other	-1.6K	¥2,900	-16.2%	¥132M ($851K)
2026-04-09	BUY	unknown	ノムラインターナショナルピーエルシー NOMURA INTERNATIONAL PLC	other	736.1K	¥2,900	+3.2%	¥980M ($6.3M)

Showing the 50 most recent of 175 filings.

Frequently asked questions

Who has been buying Tri Chemical Laboratories Inc. stock?: 16 distinct investors have filed 70 disclosed large-shareholding filings in Tri Chemical Laboratories Inc. (4369), most recently on 2026-05-13. 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 Tri Chemical Laboratories Inc. have?: Tri Chemical Laboratories Inc. has 70 buy-side and 48 sell-side disclosures on record, covering ¥133.9B ($864.1M) in total reported value, spanning 2021-06-22 to 2026-05-13.
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.