Summary
Updated Aug 31, 2026
Hiroyasu Koike is Head of Investment Management of NOMURA HOLDINGS INC (NMR). 5 SEC Form 4 filings on record, most recently on 26 August 2026.
Recent Transactions
7Every recent SEC Form 4 transaction Hiroyasu Koike has reported, most recent first.
Trading Pattern
InsiderAlpha's records for Hiroyasu Koike go back to 2026: 5 primary Form 4 filings, an average of 5.0 per year. No transaction on record carries a Rule 10b5-1 flag - the filings look discretionary rather than pre-scheduled, which makes their timing more informative as a signal.
Other Insiders Active in the Same Stocks
Insiders who reported open-market trades in the last 12 months at the companies Hiroyasu Koike files at. Multiple unrelated insiders buying the same stock within a short window, cluster buying, has historically been one of the strongest Form 4 signals.
- Masahiro Ishizuka - $2K of NMR open-market activity in the last 12 months
- Shoji Ogawa - $2K of NMR open-market activity in the last 12 months
- Yukiko Ozaki - $64 of NMR open-market activity in the last 12 months
More Notable Insiders
Other corporate insiders with significant SEC Form 4 track records on InsiderAlpha:
Frequently Asked Questions
Who is Hiroyasu Koike?
Hiroyasu Koike is a corporate insider, tracked as Head of Investment Management of NOMURA HOLDINGS INC (NMR). InsiderAlpha holds 5 primary Form 4 filings for them, the earliest from 2026, updated as new SEC EDGAR filings are processed.
How many SEC Form 4 filings has Hiroyasu Koike submitted recently?
3 primary Form 4 filings in the last 90 days, covering 1 company.
Where can I see all of Hiroyasu Koike's SEC filings?
All Form 4 filings, transaction values, and 10b5-1 plan flags are listed on this page and updated in real time as new SEC EDGAR filings are processed.
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