大株主の所有状況（株式数、持株比率）
[{"name":"株式会社細沼","value":1287950,"percentage":"45.83"},{"name":"細沼 順人","value":669592,"percentage":"23.83"},{"name":"細沼 菜穂子","value":266276,"percentage":"9.47"},{"name":"株式会社大岳カンパニー","value":196000,"percentage":"6.97"},{"name":"株式会社山崎砂利商店","value":132200,"percentage":"4.7"},{"name":"成友興業従業員持株会","value":71100,"percentage":"2.53"},{"name":"細沼 理恵","value":33582,"percentage":"1.19"},{"name":"西武信用金庫","value":30303,"percentage":"1.07"},{"name":"多摩信用金庫","value":9000,"percentage":"0.32"},{"name":"株式会社日本カストディ銀行（信託口）","value":5100,"percentage":"0.18"}]
上位10株主の持株比率合計は96.09%です。
所有者別構成（単元数、持株比率）
[{"name":"その他の法人","value":16246,"percentage":"57.84"},{"name":"個人その他","value":11335,"percentage":"40.35"},{"name":"金融機関","value":448,"percentage":"1.59"},{"name":"金融商品取引業者","value":32,"percentage":"0.11"},{"name":"個人以外","value":0,"percentage":"0.09"},{"name":"個人","value":0,"percentage":"0.01"}]