Who has been buying THK Co., Ltd. stock?

33 distinct investors have filed 80 disclosed large-shareholding filings in THK Co., Ltd. (6481), most recently on 2026-05-07. 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 THK Co., Ltd. have?

THK Co., Ltd. has 80 buy-side and 53 sell-side disclosures on record, covering ¥143.9B ($928.5M) in total reported value, spanning 2021-06-04 to 2026-05-07.

Where does StockDrifts get THK 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.

THK Co., Ltd. 6481

Company

THK株式会社THK Co., Ltd.

Investors

Buys

Total Value

¥143.9B ($928.5M)

Avg Return

+86.57%

Last Filing

2026-05-07

THK Co., Ltd. (6481) has 80 disclosed large-shareholding filings and 53 disclosed disposals on record, filed by 33 distinct investors. Together those filings cover ¥143.9B ($928.5M) in reported transaction value. The earliest filing StockDrifts holds for THK Co., Ltd. is dated 2021-06-04; the most recent is 2026-05-07. 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 +86.57%, 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
2026-07-23	BUY	Market Buy	野村アセットマネジメント株式会社	other	6.3M	¥7,155	+3.8%	¥7.2B ($46.2M)
2026-07-23	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	823.1K	¥7,155	+3.8%	¥4.0B ($25.8M)
2026-07-23	BUY	Market Buy	野村證券株式会社	other	573.8K	¥7,155	+3.8%	¥767M ($4.9M)
2026-06-05	BUY	unknown	SMBC日興証券株式会社	other	728.9K	¥7,609	+2.3%	¥5.5B ($35.8M)
2026-06-05	BUY	Market Buy	三井住友DSアセットマネジメント株式会社	passive	5.7M	¥7,609	+2.3%	¥43.1B ($278.1M)
2026-06-04	BUY	unknown	野村アセットマネジメント株式会社	other	5.3M	¥7,807	-0.3%	¥41.6B ($268.4M)
2026-06-04	BUY	unknown	ノムラインターナショナルピーエルシー NOMURA INTERNATIONAL PLC	other	265.2K	¥7,807	-0.3%	¥2.1B ($13.4M)
2026-06-04	BUY	unknown	野村證券株式会社	other	462.7K	¥7,807	-0.3%	¥3.6B ($23.3M)
2026-05-21	BUY	Market Buy	野村アセットマネジメント株式会社	other	5.1M	¥7,126	-0.7%	¥934M ($6.0M)
2026-05-21	SELL	unknown	ノムラインターナショナルピーエルシー NOMURA INTERNATIONAL PLC	other	-199.1K	¥7,126	+0.7%	¥16.5B ($106.2M)
2026-05-21	BUY	unknown	野村證券株式会社	other	898.4K	¥7,126	-0.7%	¥6.4B ($41.3M)
2026-05-07	BUY	unknown	野村アセットマネジメント株式会社	other	5.0M	¥6,244	+21.9%	¥31.3B ($201.8M)
2026-05-07	BUY	unknown	ノムラインターナショナルピーエルシー NOMURA INTERNATIONAL PLC	other	2.1M	¥6,244	+21.9%	¥13.2B ($85.1M)
2026-03-18	BUY	Market Buy	ラザード・ジャパン・アセット・マネージメント株式会社	passive	872.5K	¥4,990	+14.6%	¥5.0B ($32.2M)
2026-03-18	BUY	Market Buy	ラザード・アセット・マネージメント・エルエルシー Lazard Asset Management LLC	passive	5.5M	¥4,990	+14.6%	¥31.5B ($203.5M)
2026-03-05	BUY	unknown	アモーヴァ・アセットマネジメント株式会社	other	1.8M	¥5,107	+12.0%	¥10.4B ($67.4M)
2026-03-05	BUY	unknown	三井住友トラスト・アセットマネジメント株式会社	other	4.3M	¥5,107	+12.0%	¥24.4B ($157.5M)
2025-10-17	SELL	Market Buy	ラザード・ジャパン・アセット・マネージメント株式会社 Lazard Japan Asset Management Co., Ltd.	passive	1.2M	¥4,272	-33.9%	¥10.3B ($66.3M)
2025-10-17	BUY	Market Buy	ラザード・アセット・マネージメント・エルエルシー Lazard Asset Management LLC	passive	4.6M	¥4,272	+33.9%	¥509M ($3.3M)
2025-08-15	BUY	Market Buy	ラザード・ジャパン・アセット・マネージメント株式会社 Lazard Japan Asset Management Co., Ltd.	passive	3.9M	¥4,056	+41.0%	¥1.5B ($9.9M)
2025-08-15	BUY	Market Buy	ラザード・アセット・マネージメント・エルエルシー Lazard Asset Management LLC	passive	4.9M	¥4,056	+41.0%	¥158M ($1.0M)
2025-05-09	SELL	unknown	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	4.9M	¥3,395	-68.4%	¥88M ($569K)
2025-05-09	SELL	unknown	株式会社三井住友銀行 Sumitomo Mitsui Banking Corporation	other	0	¥3,395	-68.4%	¥529M ($3.4M)
2025-05-09	SELL	unknown	SMBC日興証券株式会社 SMBC Nikko Securities Inc.	other	27.3K	¥3,395	-68.4%	¥5.2B ($33.6M)
2025-04-07	BUY	Market Buy	SMBC日興証券株式会社 SMBC Nikko Securities Inc.	other	1.6M	¥2,981	+91.8%	¥4.7B ($30.1M)
2025-04-07	BUY	Market Buy	株式会社三井住友銀行 Sumitomo Mitsui Banking Corporation	other	149.5K	¥2,981	+91.8%	¥446M ($2.9M)
2025-04-07	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	4.9M	¥2,981	+91.8%	¥14.5B ($93.8M)
2025-03-18	BUY	Market Buy	ラザード・アセット・マネージメント・エルエルシー Lazard Asset Management LLC	passive	4.8M	¥3,873	+47.6%	¥2.0B ($13.0M)
2025-03-18	BUY	Market Buy	ラザード・ジャパン・アセット・マネージメント株式会社 Lazard Japan Asset Management Co., Ltd.	passive	3.6M	¥3,873	+47.6%	¥3.3B ($21.1M)
2025-01-21	BUY	unknown	ウエリントン・マネージメント・インターナショナル・リミテッド Wellington Management International Ltd	other	197.2K	¥3,803	+50.4%	¥99M ($637K)
2025-01-21	SELL	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	1.0M	¥3,803	-50.4%	¥395M ($2.5M)
2025-01-21	SELL	unknown	ウエリントン・マネージメント・カンパニー・エルエルピー Wellington Management Company LLP	other	2.9M	¥3,803	-50.4%	¥10.1B ($65.0M)
2024-12-04	SELL	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	77.8K	¥3,640	-57.1%	¥1.2B ($7.9M)
2024-12-04	BUY	unknown	ウエリントン・マネージメント・インターナショナル・リミテッド Wellington Management International Ltd	other	174.4K	¥3,640	+57.1%	¥95M ($610K)
2024-12-04	SELL	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	1.1M	¥3,640	-57.1%	¥1.0B ($6.7M)
2024-12-04	SELL	unknown	ウエリントン・マネージメント・カンパニー・エルエルピー Wellington Management Company LLP	other	5.5M	¥3,640	-57.1%	¥3.2B ($20.7M)
2024-11-22	SELL	unknown	フィデリティ投信株式会社 FIL Investments (Japan) Limited	other	4.3M	¥3,590	-59.3%	¥8.0B ($51.7M)
2024-08-21	SELL	Market Buy	ウエリントン・マネージメント・インターナショナル・リミテッド Wellington Management International Ltd	other	140.7K	¥2,706	-111.3%	¥949M ($6.1M)
2024-08-21	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	420.7K	¥2,706	+111.3%	¥1.1B ($7.3M)
2024-08-21	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	1.4M	¥2,706	+111.3%	¥1.6B ($10.4M)
2024-08-21	BUY	Market Buy	ウエリントン・マネージメント・カンパニー・エルエルピー Wellington Management Company LLP	other	6.4M	¥2,706	+111.3%	¥2.4B ($15.2M)
2024-07-19	BUY	unknown	日興アセットマネジメント株式会社 Nikko Asset Management Co.,Ltd.	other	2.2M	¥3,035	+88.4%	¥434M ($2.8M)
2024-07-19	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	3.2M	¥3,035	-88.4%	¥4.1B ($26.2M)
2024-05-22	BUY	unknown	アセットマネジメントOne株式会社 Asset Management One Co., Ltd.	other	3.8M	¥3,065	+86.6%	¥11.8B ($76.0M)
2024-05-22	BUY	unknown	株式会社みずほ銀行 Mizuho Bank, Ltd.	strategic	2.8M	¥3,065	+86.6%	¥8.6B ($55.5M)
2023-12-19	SELL	Market Buy	ラザード・ジャパン・アセット・マネージメント株式会社 Lazard Japan Asset Management Co., Ltd.	passive	2.7M	¥2,835.5	-101.7%	¥1.5B ($9.7M)
2023-12-19	SELL	Market Buy	ラザード・アセット・マネージメント・エルエルシー Lazard Asset Management LLC	passive	4.3M	¥2,835.5	-101.7%	¥3.4B ($21.6M)
2023-12-06	BUY	unknown	日興アセットマネジメント株式会社 Nikko Asset Management Co.,Ltd.	other	2.1M	¥2,949.5	+93.9%	¥6.1B ($39.4M)
2023-12-06	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	4.5M	¥2,949.5	+93.9%	¥13.3B ($86.0M)
2023-10-18	BUY	unknown	ウエリントン・マネージメント・インターナショナル・リミテッド Wellington Management International Ltd	other	497.0K	¥2,799	+104.3%	¥1.4B ($9.0M)

Showing the 50 most recent of 160 filings.

Frequently asked questions

Who has been buying THK Co., Ltd. stock?: 33 distinct investors have filed 80 disclosed large-shareholding filings in THK Co., Ltd. (6481), most recently on 2026-05-07. 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 THK Co., Ltd. have?: THK Co., Ltd. has 80 buy-side and 53 sell-side disclosures on record, covering ¥143.9B ($928.5M) in total reported value, spanning 2021-06-04 to 2026-05-07.
Where does StockDrifts get THK 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 THK Co., Ltd.. For how StockDrifts scores these disclosures, see the Japan insider signal tier research, or browse every Japanese stock we track.