It is Endless's stated intention to merge O2O, owner of the print manager Banner Managed Communication, with multi-channel business supplies firm Vasanta to create a £660m-turnover group.
Endless announced its 51p per share cash offer in August. The deal values O2O, which posted a pre-tax profit of £4.2m on sales of £232m last year, at around £19.1m.
The acquisition, which is still subject to the approval of the Irish Competition Authority, is expected to complete by the end of this month.