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Muromachi Chemicals Inc. 4885

Company
室町ケミカル株式会社Muromachi Chemicals Inc.
Investors
5
Buys
6
Total Value
¥176M ($1.1M)
Avg Return
-11.31%
Last Filing
2026-04-27

Muromachi Chemicals Inc. (4885) has 6 disclosed large-shareholding filings and 5 disclosed disposals on record, filed by 5 distinct investors. Together those filings cover ¥176M ($1.1M) in reported transaction value. The earliest filing StockDrifts holds for Muromachi Chemicals Inc. is dated 2021-08-12; the most recent is 2026-04-27. 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 -11.31%, measured from each filing date to the latest available close.

Price & insider activity (12 months)

Recent filings

DateTypeSourceInsiderPurposeSharesPrice at filingReturnValue
2026-04-27SELLunknown
村山 哲朗
Tetsuro Murayama
activist410.0K¥984+2.9%¥197M ($1.3M)
2023-06-22SELLunknown
青木 淳一
Junichi Aoki
strategic335.9K¥842-23.9%¥1M ($7K)
2023-02-03SELLunknown
村山 哲朗
Tetsuro Murayama
activist610.0K¥765-36.3%¥100M ($647K)
2022-10-20SELLunknown
村山 哲朗
Tetsuro Murayama
activist741.0K¥898-16.1%¥135M ($871K)
2022-10-20BUYunknown
村山 哲朗
Tetsuro Murayama
activist741.0K¥898+16.1%¥135M ($871K)
2021-11-01SELLunknown
村山 哲朗
Tetsuro Murayama
activist891.0K¥1,234+15.5%¥335M ($2.2M)
2021-08-12BUYunknown
穗苅 久美
Kumi Hokari
other75.0K¥1,176-11.3%¥88M ($569K)
2021-08-12BUYunknown
大辻 正高
Masataka Otsuji
other75.0K¥1,176-11.3%¥88M ($569K)
2021-08-12BUYMarket Buy
穗苅 久美
Kumi Hokari
unknown75.0K¥1,176-11.3%¥88M ($569K)
2021-08-12BUYMarket Buy
大辻 正高
Masataka Otsuji
unknown75.0K¥1,176-11.3%¥88M ($569K)
2021-08-12BUYMarket Buy
室町機械株式会社
Muromachi Machinery Co., Ltd.
passive58.0K¥1,176-11.3%¥68M ($440K)
2021-08-12BUYunknown
室町機械株式会社
Muromachi Machinery Co., Ltd.
other58.0K¥1,176-11.3%¥68M ($440K)

Frequently asked questions

Who has been buying Muromachi Chemicals Inc. stock?
5 distinct investors have filed 6 disclosed large-shareholding filings in Muromachi Chemicals Inc. (4885), most recently on 2026-04-27. 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 Muromachi Chemicals Inc. have?
Muromachi Chemicals Inc. has 6 buy-side and 5 sell-side disclosures on record, covering ¥176M ($1.1M) in total reported value, spanning 2021-08-12 to 2026-04-27.
Where does StockDrifts get Muromachi Chemicals Inc. 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 Muromachi Chemicals Inc.. For how StockDrifts scores these disclosures, see the Japan insider signal tier research, or browse every Japanese stock we track.