Who has been buying Tokyo Seimitsu Co., Ltd. stock?

28 distinct investors have filed 64 disclosed large-shareholding filings in Tokyo Seimitsu Co., Ltd. (7729), most recently on 2026-04-23. 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 Tokyo Seimitsu Co., Ltd. have?

Tokyo Seimitsu Co., Ltd. has 64 buy-side and 50 sell-side disclosures on record, covering ¥258.2B ($1.7B) in total reported value, spanning 2021-06-22 to 2026-04-23.

Where does StockDrifts get Tokyo Seimitsu 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.

Tokyo Seimitsu Co., Ltd. 7729

Company

株式会社東京精密Tokyo Seimitsu Co., Ltd.

Investors

Buys

Total Value

¥258.2B ($1.7B)

Avg Return

+152.76%

Last Filing

2026-04-23

Tokyo Seimitsu Co., Ltd. (7729) has 64 disclosed large-shareholding filings and 50 disclosed disposals on record, filed by 28 distinct investors. Together those filings cover ¥258.2B ($1.7B) in reported transaction value. The earliest filing StockDrifts holds for Tokyo Seimitsu Co., Ltd. is dated 2021-06-22; the most recent is 2026-04-23. 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 +152.76%, 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
2026-08-07	BUY	Market Buy	野村アセットマネジメント株式会社	other	3.4M	¥17,375	+10.2%	¥3.2B ($20.4M)
2026-08-07	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	325.8K	¥17,375	+10.2%	¥3.6B ($23.2M)
2026-08-07	SELL	unknown	野村證券株式会社	other	8.1K	¥17,375	-10.2%	¥955M ($6.2M)
2026-07-30	BUY	unknown	みずほ信託銀行株式会社	strategic	289.7K	¥15,445	+24.0%	¥4.5B ($28.9M)
2026-07-30	SELL	unknown	アセットマネジメントOne株式会社	other	3.4M	¥15,445	-24.0%	¥4.1B ($26.5M)
2026-07-30	SELL	unknown	アセットマネジメントOneインターナショナル Asset Management One International Ltd.	other	26.0K	¥15,445	-24.0%	¥2.1B ($13.5M)
2026-07-30	SELL	unknown	みずほ証券株式会社	other	46.9K	¥15,445	-24.0%	¥588M ($3.8M)
2026-07-30	BUY	unknown	株式会社みずほ銀行	strategic	672.2K	¥15,445	+24.0%	¥10.4B ($67.0M)
2026-07-23	SELL	unknown	ノムラインターナショナルピーエルシー NOMURA INTERNATIONAL PLC	other	117.5K	¥18,445	-3.8%	¥3.2B ($20.6M)
2026-07-23	SELL	unknown	野村アセットマネジメント株式会社	other	3.2M	¥18,445	-3.8%	¥7.3B ($47.3M)
2026-07-23	BUY	Market Buy	野村證券株式会社	other	63.3K	¥18,445	+3.8%	¥2.6B ($16.6M)
2026-04-23	SELL	unknown	野村アセットマネジメント株式会社	other	3.6M	¥16,900	-0.5%	¥2.4B ($15.2M)
2026-04-23	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	292.8K	¥16,900	+0.5%	¥2.9B ($18.9M)
2026-04-23	SELL	unknown	野村證券株式会社	other	-78.0K	¥16,900	-0.5%	¥10.4B ($66.8M)
2026-03-30	SELL	unknown	野村アセットマネジメント株式会社	other	3.7M	¥13,420	-29.3%	¥2.8B ($18.3M)
2026-03-30	SELL	unknown	ノムラインターナショナルピーエルシー NOMURA INTERNATIONAL PLC	other	119.1K	¥13,420	-29.3%	¥1.5B ($9.9M)
2026-03-30	BUY	unknown	野村證券株式会社	other	537.3K	¥13,420	+29.3%	¥7.2B ($46.5M)
2026-02-26	SELL	Market Buy	野村アセットマネジメント株式会社	other	3.9M	¥18,235	+10.9%	¥63.7B ($411.3M)
2026-02-26	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	230.5K	¥18,235	-10.9%	¥3.7B ($24.2M)
2026-02-26	BUY	Market Buy	野村證券株式会社	other	6.5K	¥18,235	-10.9%	¥105M ($680K)
2026-02-05	BUY	block_purchase	株式会社みずほ銀行 Mizuho Bank, Ltd.	strategic	4.9M	¥13,560	+19.8%	¥6.6B ($42.9M)
2026-01-09	BUY	Market Buy	ティー・ロウ・プライス・アソシエイツ	passive	245.4K	¥11,760	+38.2%	¥4.0B ($25.7M)
2026-01-09	BUY	Market Buy	ティー・ロウ・プライス・インターナショナル・リミテッド T. Rowe Price International Ltd.	passive	1.9M	¥11,760	+38.2%	¥30.7B ($197.9M)
2026-01-09	BUY	Market Buy	ティー・ロウ・プライス・ジャパン株式会社	passive	628.3K	¥11,760	+38.2%	¥10.2B ($65.9M)
2025-12-23	SELL	unknown	アセットマネジメントOneインターナショナル Asset Management One International Ltd.	other	161.0K	¥10,970	-48.1%	¥2.6B ($16.9M)
2025-12-23	SELL	unknown	アセットマネジメントOne株式会社	other	3.3M	¥10,970	-48.1%	¥53.1B ($342.3M)
2025-12-23	BUY	unknown	みずほ信託銀行株式会社	strategic	289.9K	¥10,970	-48.1%	¥4.7B ($30.4M)
2025-12-23	BUY	unknown	株式会社みずほ銀行	strategic	672.2K	¥10,970	-48.1%	¥10.9B ($70.5M)
2025-11-21	BUY	Market Buy	ティー・ロウ・プライス・アソシエイツ T. Rowe Price Associates	passive	214.2K	¥10,295	+57.8%	¥2.2B ($14.2M)
2025-11-21	BUY	Market Buy	ティー・ロウ・プライス・インターナショナル・リミテッド T. Rowe Price International Ltd.	passive	1.5M	¥10,295	+57.8%	¥15.4B ($99.6M)
2025-11-21	BUY	Market Buy	ティー・ロウ・プライス・ジャパン株式会社 T. Rowe Price Japan, Inc.	passive	447.1K	¥10,295	+57.8%	¥4.6B ($29.7M)
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	759.9K	¥10,140	-60.3%	¥729M ($4.7M)
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	1.4M	¥10,140	-60.3%	¥943M ($6.1M)
2025-09-18	BUY	Market Buy	アセットマネジメントOneインターナショナル Asset Management One International Ltd.	other	281.0K	¥9,549	+70.2%	¥2.7B ($17.3M)
2025-09-18	BUY	Market Buy	アセットマネジメントOne株式会社 Asset Management One Co., Ltd.	other	3.6M	¥9,549	+70.2%	¥4.1B ($26.6M)
2025-09-18	BUY	Market Buy	みずほ信託銀行株式会社 Mizuho Trust & Banking Co., Ltd.	strategic	289.9K	¥9,549	+70.2%	¥2.8B ($17.9M)
2025-09-18	BUY	Market Buy	株式会社みずほ銀行 Mizuho Bank, Ltd.	strategic	672.2K	¥9,549	+70.2%	¥6.4B ($41.4M)
2025-08-21	BUY	Market Buy	アセットマネジメントOneインターナショナル Asset Management One International Ltd.	other	280.0K	¥8,166	+99.0%	¥311M ($2.0M)
2025-08-21	BUY	Market Buy	アセットマネジメントOne株式会社 Asset Management One Co., Ltd.	other	3.2M	¥8,166	+99.0%	¥3.3B ($21.2M)
2025-08-21	SELL	Market Buy	みずほ信託銀行株式会社 Mizuho Trust & Banking Co., Ltd.	strategic	289.9K	¥8,166	-99.0%	¥69M ($445K)
2025-08-21	BUY	Market Buy	株式会社みずほ銀行 Mizuho Bank, Ltd.	strategic	672.2K	¥8,166	+99.0%	¥5.5B ($35.4M)
2025-06-04	SELL	unknown	野村證券株式会社 Nomura Securities Co.,Ltd.	other	-2.0K	¥8,041	-102.1%	¥71.2B ($459.5M)
2025-06-04	BUY	unknown	野村アセットマネジメント株式会社 Nomura Asset Management Co., Ltd.	other	4.3M	¥8,041	+102.1%	¥33.9B ($218.8M)
2025-06-04	BUY	unknown	ノムラインターナショナルピーエルシー NOMURA INTERNATIONAL PLC	other	44.3K	¥8,041	+102.1%	¥357M ($2.3M)
2025-05-27	BUY	unknown	野村アセットマネジメント株式会社 Nomura Asset Management Co., Ltd.	other	4.6M	¥8,242	+97.2%	¥37.9B ($244.5M)
2025-05-27	SELL	unknown	野村證券株式会社 Nomura Securities Co.,Ltd.	other	89.7K	¥8,242	-97.2%	¥62.6B ($403.6M)
2025-05-09	BUY	Market Buy	アセットマネジメントOneインターナショナル Asset Management One International Ltd.	other	241.8K	¥8,559	+89.9%	¥36M ($233K)
2025-05-09	BUY	Market Buy	アセットマネジメントOne株式会社 Asset Management One Co., Ltd.	other	2.7M	¥8,559	+89.9%	¥3.6B ($23.3M)
2025-05-09	BUY	Market Buy	みずほ信託銀行株式会社 Mizuho Trust & Banking Co., Ltd.	strategic	297.8K	¥8,559	+89.9%	¥2.5B ($16.4M)
2025-05-09	BUY	Market Buy	みずほ証券株式会社 Mizuho Securities Co., Ltd.	other	18.4K	¥8,559	+89.9%	¥14.0B ($90.6M)

Showing the 50 most recent of 177 filings.

Frequently asked questions

Who has been buying Tokyo Seimitsu Co., Ltd. stock?: 28 distinct investors have filed 64 disclosed large-shareholding filings in Tokyo Seimitsu Co., Ltd. (7729), most recently on 2026-04-23. 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 Tokyo Seimitsu Co., Ltd. have?: Tokyo Seimitsu Co., Ltd. has 64 buy-side and 50 sell-side disclosures on record, covering ¥258.2B ($1.7B) in total reported value, spanning 2021-06-22 to 2026-04-23.
Where does StockDrifts get Tokyo Seimitsu 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 Tokyo Seimitsu Co., Ltd.. For how StockDrifts scores these disclosures, see the Japan insider signal tier research, or browse every Japanese stock we track.