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Sumiken Mitsui Road Co.,Ltd. 1776

Company
三井住建道路株式会社Sumiken Mitsui Road Co.,Ltd.
Investors
4
Buys
4
Total Value
¥8.2B ($53.1M)
Avg Return
+51.39%
Last Filing
2026-05-14

Sumiken Mitsui Road Co.,Ltd. (1776) has 4 disclosed large-shareholding filings and 6 disclosed disposals on record, filed by 4 distinct investors. Together those filings cover ¥8.2B ($53.1M) in reported transaction value. The earliest filing StockDrifts holds for Sumiken Mitsui Road Co.,Ltd. is dated 2021-08-20; the most recent is 2026-05-14. 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 +51.39%, measured from each filing date to the latest available close.

Price & insider activity (12 months)

Recent filings

DateTypeSourceInsiderPurposeSharesPrice at filingReturnValue
2026-05-14SELLnegotiated
三井住友建設株式会社
Sumitomo Mitsui Construction Co.,Ltd.
activist9.3M¥1,990-0.3%¥17.4B ($112.4M)
2026-04-28SELLunknown
野村絢
unknown0¥1,986-0.4%¥673M ($4.3M)
2026-04-28SELLunknown
株式会社シティインデックスイレブンス
unknown0¥1,986-0.4%¥251M ($1.6M)
2026-04-27BUYnegotiated
三井住友建設株式会社
Sumitomo Mitsui Construction Co.,Ltd.
strategic10.0M¥1,986+0.4%¥19.8B ($127.7M)
2026-04-27BUYMarket Buy
三井住友建設株式会社
Sumitomo Mitsui Construction Co.,Ltd.
activist8.8M¥1,986+0.4%¥7.7B ($49.6M)
2025-04-01BUYunknown
野村絢
Aya Nomura (Murakami family)
activist338.3K¥1,353+46.6%¥458M ($3.0M)
2025-04-01BUYunknown
株式会社シティインデックスイレブンス
City Index Eleven Co., Ltd.
activist126.5K¥1,353+46.6%¥171M ($1.1M)
2022-12-22SELLunknown
エフエムアール エルエルシー(FMR LLC)
FMR LLC
other350.1K¥818-142.4%¥116M ($749K)
2022-11-22SELLunknown
エフエムアール エルエルシー(FMR LLC)
FMR LLC
other491.4K¥816-143.0%¥119M ($767K)
2022-08-22SELLunknown
エフエムアール エルエルシー(FMR LLC)
FMR LLC
other637.0K¥937-111.6%¥96M ($623K)
2021-08-20BUYMarket Buy
エフエムアール エルエルシー(FMR LLC)
FMR LLC
other740.6K¥935+112.1%¥95M ($616K)

Frequently asked questions

Who has been buying Sumiken Mitsui Road Co.,Ltd. stock?
4 distinct investors have filed 4 disclosed large-shareholding filings in Sumiken Mitsui Road Co.,Ltd. (1776), most recently on 2026-05-14. 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 Sumiken Mitsui Road Co.,Ltd. have?
Sumiken Mitsui Road Co.,Ltd. has 4 buy-side and 6 sell-side disclosures on record, covering ¥8.2B ($53.1M) in total reported value, spanning 2021-08-20 to 2026-05-14.
Where does StockDrifts get Sumiken Mitsui Road 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 Sumiken Mitsui Road Co.,Ltd.. For how StockDrifts scores these disclosures, see the Japan insider signal tier research, or browse every Japanese stock we track.