什么是5%机制？On Sep 18, 株式会社アイエフエム submitted the Large Shareholding Report to Ministry of Finance to disclose its 24.05% ownership of the shares in $ISHII HYOKI (6336.JP)$.
Source: Edinet Announcement
What is the 5% shareholding reporting system?
Shareholders with holding ratio exceeding 5% must submit a Large Shareholding Report within five business days from that day. If the holding ratio increases or decreases by 1% or more after submitting a Large Shareholding Report, the holder must submit a Change Report within five business days from that day.