大株主の所有状況（株式数、持株比率）
[{"name":"大日本印刷株式会社","value":51078000,"percentage":"55.19"},{"name":"株式会社フォルトウナ","value":4383000,"percentage":"4.73"},{"name":"株式会社講談社","value":3620000,"percentage":"3.91"},{"name":"有限会社淳久堂","value":3470000,"percentage":"3.74"},{"name":"株式会社トーハン","value":3294000,"percentage":"3.55"},{"name":"株式会社小学館","value":2203000,"percentage":"2.38"},{"name":"石井 昭","value":1306000,"percentage":"1.41"},{"name":"MSIP CLIENT SECURITIES（常任代理人 モルガン・スタンレーMUFG証券株式会社）","value":1124000,"percentage":"1.21"},{"name":"丸善CHIホールディングス従業員持株会","value":1107000,"percentage":"1.19"},{"name":"公益財団法人図書館振興財団","value":919000,"percentage":"0.99"}]
上位10株主の持株比率合計は78.3%です。
所有者別構成（単元数、持株比率）
[{"name":"その他の法人","value":713508,"percentage":"77.14"},{"name":"個人その他","value":176884,"percentage":"19.12"},{"name":"個人以外","value":0,"percentage":"1.84"},{"name":"金融機関","value":9635,"percentage":"1.04"},{"name":"金融商品取引業者","value":7552,"percentage":"0.82"},{"name":"個人","value":0,"percentage":"0.04"}]