On Sep 26, アリアケ・マスター・ファンド and related parties submitted the Change Report to Ministry of Finance. The report shows that アリアケ・マスター・ファンド and related parties increased their holdings in $Chiba Kogyo Bank (8337.JP)$, with their joint shareholding ratio up from 18.2% to 19.24%.
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.