Danish telecommunications operator TDC is moving forward with revived plans for an initial public offering in the autumn that would be one of the year's largest transactions, said people familiar with the matter.

It had long been anticipated the company would float this year, after its owners late last year said they were starting a strategic review. But the most likely outcome, an IPO, suffered a setback in April when regulators scuttled its plan to merge its Switzerland business with the Swiss arm of France Telecom.