The company was founded on 28 December 1998 after the separation of the
Croatian Post and Telecommunications () into two entities:
Hrvatska pošta (Croatian Post) and Hrvatski Telekom (Croatian Telecom), which started their business operations on 1 January 1999.
Government of Croatia initiated the
privatization of the state-owned telecommunications company, Hrvatski Telekom, in 1998. By October 1999,
Deutsche Telekom, a German company, purchased a 35% stake in Hrvatski Telekom for $850 million and acquired an additional 16% stake in 2001, becoming the
majority shareholder with 51%. In 2001, Hrvatski Telekom acquired Cronet, which was the second mobile operator in Croatia and the first to offer
GSM network services in the country in 1996. Hrvatski Telekom established HT-mobilne komunikacije d.o.o. in 2002 as a separate entity dedicated to mobile services. The company rebranded as T-HT on October 1, 2004, becoming part of the global T-family of Deutsche Telekom. This included new trademarks for two business units:
T-Com for fixed network operations and
T-Mobile for mobile operations. The Croatian government transferred 7% of its shares in HT to the Fund for Croatian Homeland War Veterans and Their Families on February 17, 2005. Later that year, on October 14, 2005, Hrvatski Telekom acquired a 39.1% stake in JP HT d.d. Mostar, known as
HT Eronet, from the
Government of the Federation of Bosnia and Herzegovina as part of the national telecom company's privatization process. In May 2006, HT acquired
Iskon Internet, a major telecom provider in Croatia. By October 5, 2007, the Croatian government sold 32.5% of HT's shares through an
IPO, reducing its stake to 3.5% by June 2008, with private and institutional investors then holding 38.5%. The T-Com and T-Mobile brands were discontinued, although they remained active for business customers until 2013. HT acquired the IT services company
Combis on May 17, 2010. The Croatian government transferred 3.5% of its shares to the Pensioners’ Fund in December 2010, which transferred them to the Restructuring and Sale Center (CERP) in December 2013. CERP reduced its holding to 2.9% in December 2015. The Croatian competition agency extended HT's management of Optima until 2021. HT acquired a 76.53% stake in
Crnogorski Telekom, the largest telecommunications company in Montenegro, from
Magyar Telekom for €123.5 million in January 2017. Magyar Telekom, like HT, has Deutsche Telekom as a majority stakeholder. Hrvatski Telekom transferred its interests and shares in various subsidiaries, including Iskon Internet and OT-Optima Telekom, to HT holding on March 1, 2018. and acquired
digital terrestrial television provider HP Produkcija in November 2018, renaming it HT Produkcija in April 2019. In January 2020, HT started selling its shares in Optima. By July 2021, HT and
Zagrebačka banka agreed to sell their 54.31% stake in Optima to
Telemach Hrvatska, finalizing the transfer in January 2022. HT merged Kabelsko distributivni sustav (KDS) into HT, completed in December 2021. HT Produkcija was merged into HT in June 2022. The network unit from Ericsson Nikola Tesla Servisi joined HT Servisi, a subsidiary of HT, on January 1, 2024. == Services ==