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Nippon Chemiphar Co., Ltd. 4539

Company
日本ケミファ株式会社Nippon Chemiphar Co., Ltd.
Investors
4
Buys
4
Total Value
¥1000M ($6.4M)
Avg Return
+8.43%
Last Filing
2025-12-05

Nippon Chemiphar Co., Ltd. (4539) has 4 disclosed large-shareholding filings and 1 disclosed disposals on record, filed by 4 distinct investors. Together those filings cover ¥1000M ($6.4M) in reported transaction value. The earliest filing StockDrifts holds for Nippon Chemiphar Co., Ltd. is dated 2025-08-08; the most recent is 2025-12-05. 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 +8.43%, measured from each filing date to the latest available close.

Price & insider activity (12 months)

Recent filings

DateTypeSourceInsiderPurposeSharesPrice at filingReturnValue
2026-08-05BUYnegotiated
豊島薬品株式会社
activist242.1K¥1,564+1.3%¥379M ($2.4M)
2026-08-05BUYMarket Buy
山口一城
activist216.1K¥1,564+1.3%¥666K ($4K)
2026-08-05BUYMarket Buy
ジヤパンソフアルシム株式会社
activist457.0K¥1,564+1.3%¥67M ($434K)
2025-12-05BUYnegotiated
豊島薬品株式会社
activist242.1K¥1,528-10.3%¥408M ($2.6M)
2025-12-05BUYunknown
公益財団法人山口記念科学振興財団
Yamaguchi Scientific Promotion Public Interest Incorporated Foundation
other300.0K¥1,528+10.3%¥458M ($3.0M)
2025-12-05BUYnegotiated
山口一城
activist215.4K¥1,528+10.3%¥363M ($2.3M)
2025-12-05SELLnegotiated
ジヤパンソフアルシム株式会社
activist414.2K¥1,528-10.3%¥698M ($4.5M)
2025-08-08BUYMarket Buy
豊島薬品株式会社
Toyoshima Pharmaceutical Co., Ltd.
activist242.1K¥1,583+6.5%¥383M ($2.5M)
2025-08-08BUYMarket Buy
山口一城
Ichijo Yamaguchi
activist215.1K¥1,583+6.5%¥178M ($1.1M)
2025-08-08BUYMarket Buy
ジヤパンソフアルシム株式会社
Japan Sofalcim Co., Ltd.
activist714.2K¥1,583+6.5%¥13M ($83K)

Frequently asked questions

Who has been buying Nippon Chemiphar Co., Ltd. stock?
4 distinct investors have filed 4 disclosed large-shareholding filings in Nippon Chemiphar Co., Ltd. (4539), most recently on 2025-12-05. 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 Chemiphar Co., Ltd. have?
Nippon Chemiphar Co., Ltd. has 4 buy-side and 1 sell-side disclosures on record, covering ¥1000M ($6.4M) in total reported value, spanning 2025-08-08 to 2025-12-05.
Where does StockDrifts get Nippon Chemiphar 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 Chemiphar Co., Ltd.. For how StockDrifts scores these disclosures, see the Japan insider signal tier research, or browse every Japanese stock we track.