大株主の所有状況（株式数、持株比率）
[{"name":"(有)プラスファイブ","value":4659000,"percentage":"36.63"},{"name":"DAIWA CM SINGAPORE LTD-NOMINEE PLUS SEVEN PTE. LTD.（常任代理人 大和証券(株)）","value":1395000,"percentage":"10.97"},{"name":"(株)昭和螺旋管製作所","value":247000,"percentage":"1.94"},{"name":"東芳工業(株)","value":206000,"percentage":"1.62"},{"name":"光通信(株)","value":191000,"percentage":"1.5"},{"name":"槇田 重夫","value":189000,"percentage":"1.49"},{"name":"吉田 均","value":175000,"percentage":"1.38"},{"name":"島 亜紀","value":175000,"percentage":"1.37"},{"name":"松栄金属(株)","value":166000,"percentage":"1.3"},{"name":"ヨシタケ社員持株会","value":145000,"percentage":"1.14"}]
上位10株主の持株比率合計は59.34%です。
所有者別構成（単元数、持株比率）
[{"name":"その他の法人","value":68312,"percentage":"49.0"},{"name":"個人その他","value":52014,"percentage":"37.3"},{"name":"個人以外","value":0,"percentage":"11.9"},{"name":"金融機関","value":1416,"percentage":"1.0"},{"name":"金融商品取引業者","value":848,"percentage":"0.6"},{"name":"個人","value":0,"percentage":"0.0"}]