大株主の所有状況（株式数、持株比率）
[{"name":"株式会社SBI証券","value":346000,"percentage":"5.14"},{"name":"岡田民雄","value":328000,"percentage":"4.87"},{"name":"株式会社みずほ銀行（常任代理人 株式会社日本カストディ銀行）","value":325000,"percentage":"4.83"},{"name":"柏屋商事株式会社","value":275000,"percentage":"4.08"},{"name":"美濃窯業株式会社","value":232000,"percentage":"3.44"},{"name":"野村證券株式会社","value":226000,"percentage":"3.36"},{"name":"野村信託銀行株式会社（信託口）","value":216000,"percentage":"3.21"},{"name":"日本坩堝従業員持株会","value":210000,"percentage":"3.12"},{"name":"野間一","value":210000,"percentage":"3.12"},{"name":"日本精鉱株式会社","value":127000,"percentage":"1.88"}]
上位10株主の持株比率合計は37.05%です。
所有者別構成（単元数、持株比率）
[{"name":"個人その他","value":38079,"percentage":"54.07"},{"name":"その他の法人","value":13792,"percentage":"19.59"},{"name":"金融機関","value":10145,"percentage":"14.41"},{"name":"金融商品取引業者","value":7072,"percentage":"10.04"},{"name":"個人以外","value":0,"percentage":"1.88"},{"name":"個人","value":0,"percentage":"0.01"}]