|
（単位：千株）
|
2016/03
|
2017/03
|
2018/03
|
2019/03
|
2020/03
|
2021/03
|
2022/03
|
2023/03
|
2024/03
|
2025/03
|
|
公益財団法人博報堂教育財団
|
|
|
|
|
18.91%
|
18.9%
|
19%
|
19.24%
|
19.34%
|
19.32%
|
|
日本マスタートラスト信託銀行
|
|
|
|
|
4.33%
|
5.44%
|
10.42%
|
9.5%
|
9.63%
|
8.86%
|
|
一般社団法人博政会
|
|
|
|
|
4.98%
|
4.98%
|
4.98%
|
4.96%
|
4.99%
|
4.98%
|
|
STATE STREET BANKAND TRUST COMPANY
|
|
|
|
|
-
|
-
|
-
|
-
|
-
|
3.26%
|
|
朝日新聞社
|
|
|
|
|
3%
|
3%
|
3%
|
3.04%
|
3.05%
|
3.05%
|
|
一般社団法人フラタニテ
|
|
|
|
|
2.94%
|
2.94%
|
2.94%
|
2.98%
|
2.99%
|
2.99%
|
|
日本カストディ銀行
|
|
|
|
|
-
|
2.85%
|
3.04%
|
2.93%
|
4.08%
|
2.82%
|
|
日本テレビ放送網
|
|
|
|
|
2.3%
|
2.3%
|
2.3%
|
2.33%
|
2.34%
|
2.34%
|
|
博報堂DYホールディングス社員持株会
|
|
|
|
|
2.18%
|
2.21%
|
2.13%
|
2.14%
|
2.25%
|
2.29%
|
|
第一生命保険
|
|
|
|
|
1.85%
|
1.85%
|
1.85%
|
1.87%
|
1.88%
|
1.88%
|
|
読売新聞東京本社
|
|
|
|
|
1.84%
|
1.84%
|
1.83%
|
1.86%
|
1.87%
|
-
|
|
日本トラスティ・サービス信託銀行
|
|
|
|
|
2.59%
|
-
|
-
|
-
|
-
|
-
|
|
公益財団法人博報児童教育振興会
|
|
|
|
|
-
|
-
|
-
|
-
|
-
|
-
|
|
博報堂DYホールディングス
|
|
|
|
|
-
|
-
|
-
|
-
|
-
|
-
|
|
中本基子
|
|
|
|
|
-
|
-
|
-
|
-
|
-
|
-
|
|
計
|
|
|
|
|
44.97%
|
46.35%
|
51.54%
|
50.88%
|
52.46%
|
51.82%
|