Who has been buying Espec Corp. stock?

10 distinct investors have filed 12 disclosed large-shareholding filings in Espec Corp. (6859), most recently on 2025-10-23. 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 Espec Corp. have?

Espec Corp. has 12 buy-side and 11 sell-side disclosures on record, covering ¥9.1B ($58.5M) in total reported value, spanning 2021-06-21 to 2025-10-23.

Where does StockDrifts get Espec Corp. 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.

Espec Corp. 6859

Company

エスペック株式会社Espec Corp.

Investors

Buys

Total Value

¥9.1B ($58.5M)

Avg Return

+43.00%

Last Filing

2025-10-23

Espec Corp. (6859) has 12 disclosed large-shareholding filings and 11 disclosed disposals on record, filed by 10 distinct investors. Together those filings cover ¥9.1B ($58.5M) in reported transaction value. The earliest filing StockDrifts holds for Espec Corp. is dated 2021-06-21; the most recent is 2025-10-23. 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 +43.00%, 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
2026-07-22	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	686.0K	¥4,340	-2.3%	¥3.0B ($19.2M)
2026-07-22	BUY	unknown	アモーヴァ・アセットマネジメント株式会社	other	513.3K	¥4,340	-2.3%	¥2.2B ($14.4M)
2026-05-21	SELL	Market Buy	シュローダー・インベストメント・マネージメント(シンガポール)リミテッドLtd.) Schroder Investment Management (Singapore	passive	0	¥3,370	-23.3%	¥128M ($827K)
2026-05-21	SELL	Market Buy	シュローダー・インベストメント・マネージメント(ホンコン)リミテッドLimited) Schroder Investment Management (Hong Kong	passive	0	¥3,370	-23.3%	¥88M ($569K)
2026-05-21	BUY	Market Buy	シュローダー・インベストメント・マネジメント株式会社	passive	1.3M	¥3,370	+23.3%	¥481M ($3.1M)
2025-10-23	BUY	Market Buy	エスペック取引先持株会理事長森川智 ESPEC Business Partners Stockholding Association	strategic	2.3M	¥3,460	-3.8%	¥880M ($5.7M)
2025-10-23	SELL	unknown	エスペック取引先持株会理事長森川智 ESPEC Business Partners Stockholding Association	strategic	1.7M	¥3,460	+3.8%	¥2.0B ($13.2M)
2025-06-19	SELL	unknown	日興アセットマネジメント株式会社 Nikko Asset Management Co.,Ltd.	other	407.5K	¥2,912	-14.3%	¥21M ($134K)
2025-06-19	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	648.7K	¥2,912	-14.3%	¥900M ($5.8M)
2025-03-21	BUY	Market Buy	シュローダー・インベストメント・マネージメント(シンガポール)リミテッドLtd.) Schroder Investment Management (Singapore	passive	37.1K	¥2,500	+33.2%	¥93M ($598K)
2025-03-21	BUY	Market Buy	シュローダー・インベストメント・マネージメント(ホンコン)リミテッドLimited) Schroder Investment Management (Hong Kong	passive	27.0K	¥2,500	+33.2%	¥68M ($435K)
2025-03-21	BUY	Market Buy	シュローダー・インベストメント・マネジメント株式会社 Schroder Investment Management(Japan)Limited	passive	1.1M	¥2,500	+33.2%	¥2.8B ($18.2M)
2023-09-06	BUY	unknown	日興アセットマネジメント株式会社 Nikko Asset Management Co.,Ltd.	other	414.4K	¥2,480	+34.3%	¥71M ($457K)
2023-09-06	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	958.0K	¥2,480	-34.3%	¥619M ($4.0M)
2023-07-21	BUY	unknown	日興アセットマネジメント株式会社 Nikko Asset Management Co.,Ltd.	other	385.9K	¥2,302	+44.7%	¥99M ($636K)
2023-07-21	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	¥2,302	-44.7%	¥569M ($3.7M)
2022-09-26	SELL	unknown	アセットマネジメントOne株式会社 Asset Management One Co., Ltd.	other	511.4K	¥1,764	-88.8%	¥373M ($2.4M)
2022-09-26	SELL	unknown	みずほ信託銀行株式会社 Mizuho Trust & Banking Co., Ltd.	other	149.1K	¥1,764	-88.8%	¥50M ($325K)
2022-09-26	BUY	unknown	株式会社みずほ銀行 Mizuho Bank, Ltd.	strategic	513.5K	¥1,764	+88.8%	¥906M ($5.8M)
2022-05-19	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	activist	947.9K	¥1,800	-85.0%	¥454M ($2.9M)
2022-04-21	BUY	Market Buy	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	¥1,752	+90.1%	¥546M ($3.5M)
2022-04-21	SELL	Market Buy	日興アセットマネジメント株式会社 Nikko Asset Management Co.,Ltd.	other	342.0K	¥1,752	-90.1%	¥12M ($81K)
2021-12-24	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	activist	1.2M	¥2,176	+53.0%	¥2.6B ($16.9M)
2021-10-07	SELL	unknown	アセットマネジメントOne株式会社 Asset Management One Co., Ltd.	other	722.2K	¥2,227	-49.5%	¥540M ($3.5M)
2021-10-07	SELL	unknown	みずほ信託銀行株式会社 Mizuho Trust & Banking Co., Ltd.	other	178.4K	¥2,227	-49.5%	¥11M ($68K)
2021-10-07	BUY	unknown	株式会社みずほ銀行 Mizuho Bank, Ltd.	strategic	513.5K	¥2,227	+49.5%	¥1.1B ($7.4M)
2021-09-22	BUY	Market Buy	日興アセットマネジメント株式会社 Nikko Asset Management Co.,Ltd.	other	350.2K	¥2,338	+42.4%	¥72M ($466K)
2021-09-22	BUY	Market Buy	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	1.1M	¥2,338	+42.4%	¥523M ($3.4M)
2021-06-21	BUY	unknown	日興アセットマネジメント株式会社 Nikko Asset Management Co.,Ltd.	other	318.1K	¥2,126	+56.6%	¥676M ($4.4M)
2021-06-21	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	920.1K	¥2,126	+56.6%	¥2.0B ($12.6M)

Frequently asked questions

Who has been buying Espec Corp. stock?: 10 distinct investors have filed 12 disclosed large-shareholding filings in Espec Corp. (6859), most recently on 2025-10-23. 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 Espec Corp. have?: Espec Corp. has 12 buy-side and 11 sell-side disclosures on record, covering ¥9.1B ($58.5M) in total reported value, spanning 2021-06-21 to 2025-10-23.
Where does StockDrifts get Espec Corp. 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 Espec Corp.. For how StockDrifts scores these disclosures, see the Japan insider signal tier research, or browse every Japanese stock we track.