Who has been buying Nippon Soda Co., Ltd. stock?

8 distinct investors have filed 6 disclosed large-shareholding filings in Nippon Soda Co., Ltd. (4041), most recently on 2025-03-24. 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 Nippon Soda Co., Ltd. have?

Nippon Soda Co., Ltd. has 6 buy-side and 7 sell-side disclosures on record, covering ¥5.1B ($32.7M) in total reported value, spanning 2021-11-05 to 2025-03-24.

Where does StockDrifts get Nippon Soda 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.

Nippon Soda Co., Ltd. 4041

Company

株式会社日本曹達Nippon Soda Co., Ltd.

Investors

Buys

Total Value

¥5.1B ($32.7M)

Avg Return

+67.04%

Last Filing

2025-03-24

Nippon Soda Co., Ltd. (4041) has 6 disclosed large-shareholding filings and 7 disclosed disposals on record, filed by 8 distinct investors. Together those filings cover ¥5.1B ($32.7M) in reported transaction value. The earliest filing StockDrifts holds for Nippon Soda Co., Ltd. is dated 2021-11-05; the most recent is 2025-03-24. 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 +67.04%, 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	unknown	みずほ信託銀行株式会社	other	330.5K	¥3,780	+4.1%	¥1.2B ($8.1M)
2026-07-23	BUY	unknown	みずほ証券株式会社	other	245.3K	¥3,780	+4.1%	¥927M ($6.0M)
2026-07-23	BUY	Market Buy	株式会社みずほ銀行	strategic	1.6M	¥3,780	+4.1%	¥230M ($1.5M)
2026-07-23	SELL	unknown	アセットマネジメントOne株式会社	other	1.3M	¥3,780	-4.1%	¥146M ($944K)
2025-03-24	SELL	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	2.7M	¥2,972	-21.6%	¥759M ($4.9M)
2025-03-07	SELL	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	1.0K	¥2,952	-22.5%	¥168M ($1.1M)
2025-03-07	SELL	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	2.9M	¥2,952	-22.5%	¥2.0B ($12.8M)
2023-08-07	BUY	unknown	アセットマネジメントOne株式会社 Asset Management One Co., Ltd.	other	676.8K	¥2,610	+38.5%	¥1.8B ($11.4M)
2023-08-07	BUY	unknown	株式会社みずほ銀行 Mizuho Bank, Ltd.	strategic	816.6K	¥2,610	+38.5%	¥2.1B ($13.8M)
2023-07-06	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	300.9K	¥2,585	-39.9%	¥134M ($863K)
2023-07-06	SELL	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	721.6K	¥2,585	-39.9%	¥699M ($4.5M)
2023-07-06	BUY	Market Buy	三井住友信託銀行株式会社 Sumitomo Mitsui Trust Bank,Limited	strategic	113.4K	¥2,585	+39.9%	¥22M ($144K)
2022-09-26	SELL	Market Buy	アセットマネジメントOne株式会社 Asset Management One Co., Ltd.	other	536.1K	¥2,205	-64.0%	¥716M ($4.6M)
2022-09-26	SELL	Market Buy	みずほ信託銀行株式会社 Mizuho Trust & Banking Co., Ltd.	unknown	0	¥2,205	-64.0%	¥146M ($941K)
2022-09-26	BUY	Market Buy	株式会社みずほ銀行 Mizuho Bank, Ltd.	strategic	816.6K	¥2,205	+64.0%	¥139M ($900K)
2022-03-23	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	28.9K	¥1,747.5	+106.9%	¥51M ($326K)
2022-03-23	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	1.8M	¥1,747.5	+106.9%	¥519M ($3.3M)
2021-11-05	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	1.6M	¥1,685	+114.5%	¥2.6B ($16.9M)

Frequently asked questions

Who has been buying Nippon Soda Co., Ltd. stock?: 8 distinct investors have filed 6 disclosed large-shareholding filings in Nippon Soda Co., Ltd. (4041), most recently on 2025-03-24. 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 Nippon Soda Co., Ltd. have?: Nippon Soda Co., Ltd. has 6 buy-side and 7 sell-side disclosures on record, covering ¥5.1B ($32.7M) in total reported value, spanning 2021-11-05 to 2025-03-24.
Where does StockDrifts get Nippon Soda 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 Nippon Soda Co., Ltd.. For how StockDrifts scores these disclosures, see the Japan insider signal tier research, or browse every Japanese stock we track.