Top shareholders according to the share registration book closing on 23 March 2022 are as follows:

No. Major Shareholders # Shares % Shares
1.  Ramkhamhaeng Hospital Public Company Limited 178,489,544 21.06
2.  Mrs. Charuwan Vanasin 121,939,119 14.39
3.  Dr. Amnuay Unnanuntana 43,882,670 5.18
4.  บริษัท ราชธานีพัฒนาการ (2014) จำกัด 41,029,200 4.84
5.  Mrs. Nawara Vanasin 40,800,363 4.81
6.  Thai NVDR Company Limited 29,856,066 3.52
7.  Mr. Arsa Meksawan, PHD 28,664,737 3.38
8.  SOUTH EAST ASIA UK (TYPE C) NOMINEES LIMITED 16,143,350 1.90
9.  Mr. Aurchart Kanjanapitak, MD 14,259,500 1.68
10.  F&S 79 Co., Ltd. 8,695,656 1.03