United also said MediaLink had made no response to the offer after almost three months.
United had hoped to merge MediaLink with its PR Newswire news distribution offering, to enhance its video news release service. United said it will not pursue other options, including developing its own infrastructure or a partnership with another company.
Yesterday, MediaLink said it incurred losses of £1m, compared with a profit of £366,000 for the same period last year. Revenue was down to £7.1m from £9.4m.
Charles Gregson, executive director and board member of United and PR Newswire, said, "The new company would have offered customers an even broader array of services.
"However, since mid-August there has been only silence from MediaLink. We have watched instead as that company's board adopted a 'poison pill' purportedly 'to protect and maximise the value of the shareholders interests'."
If you have an opinion on this or any other issue raised on Brand
Republic, join the debate in the .