CenturyLink Inc. is in advanced talks to merge with Level 3 Communications Inc., a deal that would give the telecommunications companies greater heft in a brutally competitive industry.

A deal could be announced in the coming weeks, according to people familiar with the matter. As always, there is a possibility the talks could fall apart.

Terms of the deal couldn't be learned. As of Thursday afternoon before the Journal's report of the talks, Level 3, based in Broomfield, Colo., had a market value of $16.8 billion. CenturyLink, based in Monroe, La., was worth $15.2 billion.

Shares of Level 3 rose 6.1%, while CenturyLink shares jumped 14% in midday trading after the Journal's report.

Level 3, which traditionally focused on so-called enterprise customers, was one of the biggest telecom operators to survive the dot-com bust. The company runs one of the largest internet backbones in the world but has turned its focus increasingly to small and midsize business in an attempt to reverse slowing sales growth in its core business.

Year to date, the company's stock had fallen more than 14% before the talks were reported. Singapore state investment firm Temasek Holdings Pte. is Level 3's largest shareholder, with 18% of its stock, according to FactSet. Level 3 is scheduled to report third-quarter earnings next week.

CenturyLink, traditionally a rural local-phone service provider, has sought to upgrade its network with fiber-optic lines in a bid to compete with AT&T Inc., Verizon Communications Inc. and rivals in the cable industry. The company has also branched into hosting and cloud services though lately it has been looking to sell some of its data centers. CenturyLink operates more than 55 data centers, according to its website.

The so-called wireline business of running telephone and internet lines has suffered from brutal competition over the past 15 years, hurt by plummeting prices for network bandwidth and high capital costs.

The possible deal also illustrates both companies' dwindling acquisition opportunities in the sector after years of consolidation.

Both companies have historically been acquisitive. In 2014, Level 3 bought TW Telecom for about $6 billion. In 2011, it bought rival Global Crossing Ltd. for around $2 billion.

CenturyLink, formerly called CenturyTel, has also been a voracious acquirer. In 2011, it bought Qwest Communications International for $11 billion and Savvis Inc. for about $2 billion, two years after it purchased Embarq Corp. for about $6 billion.

Drew FitzGerald contributed to this article

Write to Dana Mattioli at dana.mattioli@wsj.com and Dana Cimilluca at dana.cimilluca@wsj.com

(END) Dow Jones Newswires

October 27, 2016 13:45 ET (17:45 GMT)

Copyright (c) 2016 Dow Jones & Company, Inc.
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