Who has been buying ニッコー株式会社 stock?

6 distinct investors have filed 11 disclosed large-shareholding filings in ニッコー株式会社 (5343), most recently on 2026-01-26. 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 ニッコー株式会社 have?

ニッコー株式会社 has 11 buy-side and 7 sell-side disclosures on record, spanning 2021-07-26 to 2026-01-26.

Where does StockDrifts get ニッコー株式会社 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.

ニッコー株式会社 5343

Company

ニッコー株式会社

Investors

Buys

Total Value

—

Avg Return

—

Last Filing

2026-01-26

ニッコー株式会社 (5343) has 11 disclosed large-shareholding filings and 7 disclosed disposals on record, filed by 6 distinct investors. The earliest filing StockDrifts holds for ニッコー株式会社 is dated 2021-07-26; the most recent is 2026-01-26. All of it is parsed from EDINET large-shareholding (5%+) reports, the official disclosure system operated by the Financial Services Agency (Japan).

Price & insider activity (12 months)

No price data available

Recent filings

Date	Type	Source	Insider	Purpose	Shares	Price at filing	Return	Value
2026-06-03	SELL	unknown	TDK株式会社 TDK Corporation	other	1.7M	-	-	-
2026-01-26	SELL	unknown	TDK株式会社 TDK Corporation	other	2.0M	-	-	-
2025-04-04	BUY	unknown	株式会社三谷サービスエンジン Mitani Service Engine Co., Ltd.	other	746.0K	-	-	-
2025-04-04	BUY	unknown	株式会社アテナ Athena Co., Ltd.	other	140.0K	-	-	-
2025-04-04	BUY	unknown	三谷株式会社 Mitani Co., Ltd.	other	594.7K	-	-	-
2025-04-04	BUY	Market Buy	株式会社三谷サービスエンジン Mitani Service Engine Co., Ltd.	other	746.0K	-	-	-
2025-04-04	BUY	Market Buy	三谷明子 Akiko Mitani	other	164.1K	-	-	-
2025-04-04	BUY	Market Buy	株式会社アテナ Athena Co., Ltd.	other	140.0K	-	-	-
2025-04-04	BUY	Market Buy	三谷株式会社 Mitani Co., Ltd.	other	594.7K	-	-	-
2025-04-04	BUY	Market Buy	三谷充 mitani mituru	other	8.8M	-	-	-
2025-04-04	BUY	unknown	三谷充 mitani mituru	other	8.8M	-	-	-
2025-04-04	BUY	unknown	三谷明子 Akiko Mitani	other	164.1K	-	-	-
2024-10-07	SELL	unknown	TDK株式会社 TDK Corporation	strategic	2.4M	-	-	-
2024-09-17	BUY	Market Buy	三谷明子 Akiko Mitani	other	157.1K	-	-	-
2024-09-17	BUY	unknown	株式会社三谷サービスエンジン Mitani Service Engine Co., Ltd.	other	746.0K	-	-	-
2024-09-17	SELL	unknown	有限会社北都代行社 Hokuto Agent Co., Ltd.	other	140.0K	-	-	-
2024-09-17	SELL	unknown	三谷株式会社 Mitani Co., Ltd.	other	594.7K	-	-	-
2024-09-17	BUY	Market Buy	株式会社三谷サービスエンジン Mitani Service Engine Co., Ltd.	other	746.0K	-	-	-
2024-09-17	SELL	Market Buy	有限会社北都代行社 Hokuto Agent Co., Ltd.	other	140.0K	-	-	-
2024-09-17	SELL	Market Buy	三谷株式会社 Mitani Co., Ltd.	other	594.7K	-	-	-
2024-09-17	BUY	Market Buy	三谷充 mitani mituru	other	8.7M	-	-	-
2024-09-17	BUY	unknown	三谷充 mitani mituru	other	8.7M	-	-	-
2024-09-17	BUY	unknown	三谷明子 Akiko Mitani	other	157.1K	-	-	-
2021-07-26	BUY	Market Buy	三谷充 mitani mituru	other	5.7M	-	-	-
2021-07-26	SELL	Market Buy	三谷明子 Akiko Mitani	other	119.4K	-	-	-
2021-07-26	BUY	Market Buy	有限会社北都代行社 Hokuto Agent Co., Ltd.	other	140.0K	-	-	-
2021-07-26	BUY	Market Buy	三谷株式会社 Mitani Co., Ltd.	other	594.7K	-	-	-

Frequently asked questions

Who has been buying ニッコー株式会社 stock?: 6 distinct investors have filed 11 disclosed large-shareholding filings in ニッコー株式会社 (5343), most recently on 2026-01-26. 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 ニッコー株式会社 have?: ニッコー株式会社 has 11 buy-side and 7 sell-side disclosures on record, spanning 2021-07-26 to 2026-01-26.
Where does StockDrifts get ニッコー株式会社 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 ニッコー株式会社. For how StockDrifts scores these disclosures, see the Japan insider signal tier research, or browse every Japanese stock we track.