Dr. Boon Vanasin and a group of doctors founded Thonburi Hospital Co., Ltd. with a paid-up registered capital of 20 million baht on 13 August 1976. He chose Thonburi for the hospital location as there was no private hospital in the area while the only public hospital, Siriraj Hospital, was very crowded and lots of patients had to wait for a long time due to insufficient beds. The birth of Thonburi Hospital, was aimed to provide excellent healthcare services, met demands of the growing number of patients.

Thonburi Hospital opened on 10 May 1977. Located at 34/1, Itsaraphap Road, Ban Chang Lo, Bangkok Noi, Bangkok 10700, the hospital started its operations as a 60 bed-hospital. Medical service were provided by respected and senior physicians from Siriraj Hospital who have shared commitment to providing quality and convenient services to upper-to-high income earners in Thonburi, or west side of the capital.

Thonburi Hospital had been well received and continued to grow to the point that the OPD clinics and beds could not cope with the rising demand in the area. The building extension took place in 1980 – both vertically and Horizontally upon completion. The hospital’s capacity increased to 113 beds and its register capital rose to 60 million baht.

The company was well established and determined to deliver service quality with professional excellence, and trusted by people in Thonburi area. This rapid increase in the service demand resulted in shortage of beds. The company therefore expanded its capacity by building a new12-storey building and opened Thonburi2 Hospital with 300,000,000 baht registered capital.

Thonburi2 Hospital was officially opened. The new 68-bed hospital is located at 43/4 on Borom Ratchonnani Road in Taweewattana District, Bangkok 10170.

Thonburi Hospital Co., Ltd. became a public company and was renamed “Thonburi Hospital Public Company Limited.”

The company started expanding its services through affiliated firms in the provinces. Considering the shortage of medical professionals, Thonburi Healthcare Group Pcl. joined forced with Siam University in offering undergraduate course in medicine to produce qualified medical professionals who can provide high quality service and have the ability to develop themselves and the society.

The company acquired Dental Siam Co., Ltd. which distributes dental products and operates pharmaceutical shop business.

Thonburi Healthcare Group Pcl. entered into an agreement to directly operate Provincial Administration Organization (PAO)’s hospital in Phuket, the first PAO hospital in Thailand with 129 beds.

Thonburi2 Hospital opened its second building on 1 June 2012 to cope with the increasing demand. The two buildings have a combined capacity of 95 beds.
The company also signed an agreement to operate and manage the 110-bed Pattaya City Hospital.

6 January 2014
The company bought a 31.87% stake in Sirivej Chantaburi Pcl. whose registered capital is 585 million baht.

16 July 2014
The company set up a subsidiary called the Thonburi Hospital Heart Centers Co., Ltd. to provide specialized medical and management services to other hospitals by establishing a new or being an integral part of such hospital’s heart center. Thonburi Healthcare Group Pcl. holds 70% shares in the subsidiary with a registered capital of 100 million baht. The subsidiary currently operates the heart centers for Phatara-Thonburi Hospital and Bang Phli Hospital in Samut Prakarn province.

22 September 2014
The company acquired additional shares in Modular Software Expertise Co., Ltd., raising its stakes in the company to 70% of 18 million baht in registered capital.

20 October 2014
The company set up Premiere Home Health Care Co., Ltd. to provide healthcare service at patients’ home and to build a stand-alone elderly care facility. Thonburi Healthcare Group Pcl. holds 99.99% share in the new company with a registered capital of 100 million baht.

15 December 2014
The company acquired 100% stake in Rajthanee Realty Co., Ltd. with registered capital of 700 million to operate a real estate business and to handle land plot allocation in the elderly care service project.

24 December 2014
The company took over a property firm, Thonburi Real Estate Development Co., Ltd. Thonburi Healthcare Group Pcl. holds 99.78% stake in the 800-million-baht company.

30 December 2014
The company increased its stake in Ubonrak Co., Ltd. (Ubonrak Hospital) to 34.04% of the 37.5 million baht registered capital.

January
The Company has been engaged to act as the advisor of Do Life General Hospital in Hanoi, Vietnam (with the size of 22,000 square meters)

26 March 2018
The Company has approved to dispose shares in Rajthanee Rojana Company Limited to Rajthanee Hospital Public Company Limited ( Rajthanee Rojana Hospital, Phra Nakhon Si Ayutthaya Province) and the capital gain from such disposal was approximately Baht 52.5 million.

26 March 2018
the Board of Directors has resolved to appoint the Corporate Governance and Business Ethics Committee as another sub-committee.

31 March 2018
The company completely paid ARYU shares for investment in the total amount of 20 million US dollars.

24 August 2018
The Extraordinary General Meeting of shareholders no.1/2018 resolved to acquire lands and buildings on Pracha Uthit road, Thung Khru District, Bangkok from the connected person to develop the senior home project, namely Thonburi Health Village.

24 August 2018
The Extraordinary General Meeting of shareholders resolved to acquire lands and buildings on Pracha Uthit road to develop the Thonburi Health Village, Pracha Uthi which is the accommodation for the elderly with medical services.

September
The joint venture company, namely ARYU opened Ar Yu International Hospital in Yangon, Myanmar. At the beginning, only the outpatient department (OPD) has been opened however, it will be completely opened by the early 2019.

7 November 2018
The Company invested in Thanarad Thung Song Company Limited which already operated Thonburi Thung Song Hospital. The Company held 51.12 % shares with direct voting and also held 5.31% shares with indirect voting through its subsidiary, namely Rajyindee Hospital Public Company Limited, representing 56.43% in total shareholding.

14 November 2018
the company canceled the investment on building private hospital with Aung Shwe Thee Construction Limited, Myanmar due to it could not secure the suitable land for building hospital.

24 January 2019
Thonburi Bamrungmuang Hospital was officially opened for services. The investment amount for the hospital was over Baht 4,000 million, focusing on providing 6-star personalized care by medical specialists. This was to respond to health trends and aging society and to service medical tourism customers from all over Asia and Middle East.

17 March 2019
Ar Yu International Hospital in Yangon, Myanmar was officially opened. It provides full services, including OPD and IPD services. This hospital is the first private hospital in Myanmar which meets international standards. It is a joint investment between Thonburi Healthcare Group, Ga Mone Pwint Company Limited, local operator and medical personnel in Myanmar.

30 May 2019
Thonburi Hospital was awarded Hospital of the Year Award from ‘Healthcare Asia Awards 2019’ in Singapore. Thonburi Bamrungmuang Hospital was awarded Clinical Service Initiative of the Year Award.

27 June 2019
The Company sold its investment in Rajathanee Hospital Public Company Limited (“RJH”), consisting of 12,000,000 shares. The remaining shareholding in RJH by the Company is 3.07%.

3 July 2019
Notification on change of company name of Premiere Home Health Care Co., Ltd., a subsidiary of THG, in which THG has 99.99% shareholding. The new company name is Thonburi Wellbeing Co., Ltd. which is suitable to its business operations.

2 September 2019
Ramkhamhaeng Hospital Public Company Limited (“RAM”) acquired another 2.217% of the total paid-up capital of THG. As a result, RAM becomes one of the top five major shareholders of THG. As of 30 December 2019, RAM has 10.051% shareholding in THG.

17 September 2019
Thonburi Wellbeing Co., Ltd., a 99.99% subsidiary of THG, incorporated Thonburi Property Management Co., Ltd. to operate senior residence business of Thonburi Wellbeing Co., Ltd. The registered capital of Thonburi Property Management Co., Ltd. is Baht 4,000,000.

18 November 2019
The Company officially opened Thonburi Thung Song Hospital in Thung Song Sub-district, Nakhon Si Thammarat Province for services, In the beginning, 50 hospital beds were registered for services. The hospital will be able to expand its service capacity in the future to 200 hospital beds, 12 examination rooms and 3 operating rooms.

18 December 2019
The Company’s stock (ticker: THG) was listed in SET100 Index by the Stock Exchange of Thailand. The stock is one of the 100 component stocks with market capitalization and high liquidity according to qualifications required by the stock exchange.

21 February 2020
Thonburi Burana Hospital, a rehabilitation hospital for seniors with 55 hospital beds, was officially opened. The hospital is located in Jin Wellbeing County Project.

March 2020
The Company entered into an agreement to sell all shares in the joint venture company, which operated Welly Hospital in the Republic of China, to WEGO Holding Company, the former shareholder, for the consideration of RMB 98.21 million.

13 May 2020
The Board of Directors' Meeting resolved to approve additional investment in subsidiaries, namely Thonburi Realty Development Co., Ltd. from Baht 800 million to Baht 1,270 million, which resulted in increase in shareholding to 99.86%, and Rajthanee Realty Co., Ltd. From Baht 700 million to Baht 1,960 million, maintaining the same shareholding of 100%.

1 June 2020
Thonburi Hospital was ranked the 7th place as the "Best Hospitals – Thailand" among the top hospitals in 20 different countries by Newsweek, a leading news website from the United States. THG was also recognized by Innosight as one of the five 'ASEAN TRANSFORMATION CHAMPIONS' for creating innovation and efficient business expansion through adoption of innovation and having skilled leaders.

21 July 2020
The Company entered into a memorandum of understanding with Srinakharinwirot University to support research on medical cannabis and entered into management service agreement for heart center in Panyananthaphikkhu Chonprathan Medical Center to treat cardiovascular diseases.

10 August 2020
The Company entered into a memorandum of understanding regarding academic cooperation with Mahidol University to jointly establish a research and development center for innovative medical equipment and medical services to support research and development on medical equipment in order to become smart hospital and develop technology and innovative medical technology.

September 2020
THG repurchased shares (Treasury Stock) for financial management according to the resolutions of the Board of Directors' Meeting. The period of repurchase was 6 months, ending on 20 September 2020. THG repurchased a total of 5.28 million shares at the price of Baht 19.00 – 21.30, totaling Baht 105.03 million.

January 2021
THG additionally invested in Thonburi Wellbeing Company Limited in the amount of 200 million baht. As a result, the registered capital of Thonburi Wellbeing Company Limited increased to 1,500 million baht. Such investment did not affect the existing shareholding by THG of 99.99%.

March 2021
Thonburi Hospital, which is the first hospital in THG group, has been opened since 1977. It is ranked as the 5th best hospital in Thailand in the Best Hospital 2021 – Thailand according to a survey by Newsweek, a leading news website from the United States in partnership with Statista Inc, a globally recognized research organization. The ranking is based on a survey of 2,000 hospitals in Thailand and other countries, covering 25 countries. In 2020, Thonburi Hospital was ranked as the 7th best hospital in the Best Hospital 2020 – Thailand.

April 2021
THG incorporated a subsidiary, Med Access Co., Ltd., to procure and distribute medical equipment, medical products and pharmaceuticals with a registered capital of 1 million baht and THG holds 100% of the registered capital.
THG has adjusted its operations to suit the situation by providing screening of Covid-19 patient service at affiliated hospitals so that the public can access testing more conveniently. Thonburi Bamrungmuang Hospital was adjusted to allow all inpatient departments to support treatments for moderate to severe Covid-19 patients
THG opened a hospitel to support Covid-19 patients with mild symptoms. With cooperation from subsidiaries in Bangkok and other provinces, THG subsequently opened additional hospitels to accommodate the increasing number of patients with a total of over 10,000 beds in the Thonburi’s network throughout the year to support the Covid-19 crisis which has been widely spread.

May 2021
THG cooperated with public and private sectors to establish vaccination center and provided vaccination services at communities to help distributing vaccinations to the public more widely.

June 2021
THG invested in ordinary shares of Thai Medical Glove Co., Ltd. with the total consideration of 200 million baht, accounting for 7.40% shareholding in the company.
THG launched booking of alternative vaccine, Moderna, via digital platform for organizations and individuals. Over 1 million people registered their interest in receiving alternative vaccination at 17 network hospitals across the country
THG signed a memorandum of cooperation with Thai Public Broadcasting Service (Thai PBS) to allocate medical and nursing teams to provide Covid-19 vaccination services according to medical standards and as prescribed by the Ministry of Public Health at the Thai PBS television station. The public can register via “Thai Ruam Jai, Safe Bangkok” Project. This allows the public faster access to vaccines and boosts mass immunization in Thailand.

July 2021
THG established special hospitals to accommodate Covid-19 patients with moderate to severe symptoms which was managed by Thonburi Bamrungmuang Hospital. THG invested in medical equipment and provided personnel to take care of patients, particularly in critical care rooms which was necessary at that time. The first hospital was the field hospital at the 11th Military Circle. Subsequently, two additional field hospitals were established, namely Ratchapipat Hospital and Bang Khun Thian Geriatric Hospital, with a total capacity of over 800 beds.

August 2021
THG additionally invested in an associated company, namely Sirivej Chanthaburi Public Company Limited, for the total consideration of 51,797,802 baht. Such investment was not less than the subscription rights entitled by THG. As a result, the shareholding ratio by THG increased from 31.87% to 31.92%.

September 2021
THG additionally invested in Rajthanee Hospital Public Company Limited, which increased THG's shareholding to 5.07%.

November 2021
THG incorporated a subsidiary, Thonburi Canabiz Public Company Limited to operate pharmaceutical products containing herbal extracts for use in medical treatments. THG has 75% shareholding in the company.
THG began offering Moderna vaccination service to the public through 17 affiliated hospitals. The hospitals provided over 200,000 doses of vaccination.
THG was granted a license to operate a health care service at the “Elderly Care Center, Thonburi Health Village, Pracha Uthit”. The center provides elderly care, bedridden patient care, patients recuperating after surgery, patients with chronic non-communicable diseases with a team of doctors, nurses, and physical therapists to provide customer care services.

December 2021
THG invested in 151,019 shares of Thai Longstay Management Co., Ltd. at the price of Baht 28 per share, totalling of 4,228,532 baht. As a result of such investment, THG has 15.10% shareholding in the company.

February 2022
THG has reduced its authorized capital from 849,080,000 baht to 847,467,400 baht from the share repurchase project. As a result, THG's authorized capital was reduced to 847,467,400 shares from the previous 849,080,000 shares

March 2022
THG sold shares of Thonburi Cannabis Public Co., Ltd., a subsidiary that operates in pharmaceuticals containing medicinal plant extracts for use in medical treatment. Selling 610,000 shares, reducing the shareholding proportion to 14 percent from previously held 75 percent of THG. Causing Thonburi Cannabis Public Co., Ltd. to cease being a subsidiary of THG.

May 2022
THG has invested by purchasing shares of the Phatara Hospital Co., Ltd. increased in the amount of 18,000,000 baht, resulting in an increase in shareholding from 16.67 percent to 21.47 percent, resulting in Phatara Hospital Co., Ltd. becoming an associated company of THG.

July 2022
THG jointly invests with partners by establishing Thonburi Rangsit Hospital Co., Ltd. to operate a medical service in the area in front of the Jin Wellbeing County project. Initially, it was established with a registered capital of 1,000,000 baht (10,000 ordinary shares with a par value of 100 baht per share) The total value of investment project is 2,700,000,000 baht. THG will purchase shares in the amount of 300,000,000 baht, representing a 30% shareholding, resulting in Thonburi Rangsit Hospital Co., Ltd. being an associated company of THG.

September 2022
End of the Moderna alternative vaccination program for people through 18 hospitals in the network, providing more than 800,000 doses.

October 2022
THG bought shares in Rajyindee Public Co., Ltd. in the amount of 12,890,000 baht from the existing shareholders. As a result, the shareholding ratio increased from 56.91 percent to 57.41 percent.

November 2022
THG purchased an investment in Trang Medical Trading Co., Ltd., which operates TRPH Hospital, in the amount of 657,600,000 baht from the former shareholders, THG held 55% of shareholding interest. As a result, Trang Medical Trading Co., Ltd. is a subsidiary of THG.

January 2023
THG has established of a subsidiary - Telehealth Care Company Limited. The objective is to help support the company by using telemedicine service. The registered share capital of 200 million Baht (20,000,000 ordinary shares at par value of 10 Baht per share). The company held 85% of the shareholding. The subsidiary called for 25% of registered ordinary shares and the Company already paid for the shares total of 42.50 million Baht.

June 2023
THG has sanctioned an augmentation of its investment stake in Thonburi Rangsit Hospital Co., Ltd. from 30% to 55%, thereby effected THG's shareholding status from associated to subsidiary in the forthcoming shares capital increment. In 2024 the Company will increase this shares capital.

August 2023
THG approved an increase in share capital of a subsidiary - TH Health Company Limited from 1 million Baht (10,000 ordinary shares at par value of 100 Baht per share). To 21 million Baht (210,000 ordinary shares at par value of 100 Baht per share) by issuing 200,000 ordinary shares at par value of 100 Baht per share.

September 2023
THG approved an increase in share capital of a subsidiary – Thonburi Sermrath Company Limited from 100,000,000 Baht (10,000,000 ordinary shares at par value of 10 Baht) to 113,300,000 Baht (11,330,000 ordinary shares at par value of 10 Baht) by issued new shares of 1,330,000 shares with a par value of 10 Baht. THG has relinquished its right to increase capital. This relinquishment resulted in a reduction of the ownership proportion from 99.98% to 88.24%.

December 2023
THG has established of a subsidiary - Thonburi Partners Pte. Limited in Singapore. The objective is to facilitate the company's ongoing investment projects in foreign markets (holding company). THG holds 100% of the shares, on 31 December 2023 no shares have been called for payment.