The independent has confirmed 11 of Tailor Made Travel’s shops have been "consolidated", some into existing TMT branches and others into existing Hays branches.
All staff have been retained, working either in the remaining TMT shops or nearby Hays shops.
The eight TMT locations Hays has retained are "operating as usual", and will continue to operate under the Hays Travel brand.
TMT went into administration at 4pm on Thursday (3 September), with Deloitte appointed to handle the process.
Hays subsequently agreed to acquire all 20 TMT shops, retaining around 100 staff.
Former TMT owner Simon Morgan later acquired one of TMT’s 20 shops, Blue Skies Travel in Cardiff, as part of the administration process.
TMT expanded into Cardiff for the first time in April 2019 with the acquisition of Blue Skies, which then became TMT’s 16th branch, and Caerphilly with the acquisition of Morgan Travel.
The business expanded rapidly in recent years, opening several new branches while also taking on four-branch south Wales agency chain Regal Travel.
Tailor Made’s Merthyr Tydfil team took to Facebook at the weekend to update customers on developments following the administration.
"You may have seen the recent news regarding Hays Travel acquiring the Tailor Made Travel branches," the team wrote.
"We are pleased to let you know we have all been offered an opportunity to continue to work together again as a team and provide you with amazing holidays and service.
"We are excited to see what this next chapter brings as we move forward as part of the Hays Travel family.
"Your local Tailor Made Travel branch will be closing, but all of the team will be moving to the Hays Travel branch at 6 Graham Way, Merthyr Tydfil."