Some 38 people – 30 British and three Irish – were shot dead when a gunman opened fire on holidaymakers in the Tunisian beach resort in June 2015.
A joint statement from Tui and legal firm Irwin Mitchell, which acted on behalf of the claimants, said the tragic events of 26 June 2015 were both shocking and devastating, changing the lives of those affected forever.
"Tui has always expressed heartfelt condolences to the families and friends of those caught up in the terrorist attack that day and continue to extend deepest sympathy," read the statement.