Ericsson shares fell 0.9 percent and traded at 79.10 kronor at 12:05 p.m. local time. They have gained about 3 percent this year, compared with a 16 percent advance for the benchmark OMX Stockholm 30 Index.

The FCPA prohibits American companies and overseas firms with stocks trading on U.S. exchanges from paying bribes to foreign officials.

Ericsson is moving to resolve the probes as it battles Nokia Oyj for 5G network supply contracts and looks to win customers amid a U.S.-led boycott against rival vendor Huawei Technologies Co. Ericsson said in July the first big deployments in Asia will gradually pull down margins, although not enough to jeopardize profitability targets for 2020.

Asked in a phone interview whether the ethics breaches will make it harder for the company to win 5G contracts, Ekholm said that "of course there is a risk" but that the company's "focus on making sure we have a very competitive product portfolio is still in place."

Ekholm took over as CEO in 2017 to turn Ericsson around after fierce competition from Chinese rivals and dwindling carrier spending on fourth-generation wireless gear led to a plunge in the company's shares. The new tech offers a chance to boost sales as companies invest big on equipment in a global market dominated by just three players.

Third-quarter net income is expected to drop about 15 percent, to 2.3 billion kronor, according to the average of analyst estimates compiled before Ericsson's Thursday statement.

Ericsson's announcement has "some clear negative implications" with "meaningful cash outflows down the line," analysts at Citigroup, including Amit Harchandani and Robert Lamb, said in a note. They also see potential risks of prosecution or charges against executives.

"It's very hard for us to assess" the risk of employees getting prosecuted, Ekholm said. "Criminal charges will be decided by the U.S. authorities or authorities in general, and I cannot speculate about that."

Penalties of $1 billion would surpass the $965 million payment imposed on Sweden-based Telia Co. in 2017 after the telecommunications carrier admitted to paying hundreds of millions of dollars in bribes to a government official in Uzbekistan.

Ericsson's estimate of the charges it faces is "within the ballpark" of similar settlements, such as Telia's, the Citigroup analysts said. The "overhang" around the case would probably go away by next year, they said.

The SEC has undertaken 11 enforcement actions under the FCPA this year, including fines against Walmart Inc., Microsoft Corp., Deutsche Bank AG, and Telefonica Brasil SA, according to the regulator's website. Petróleo Brasileiro SA agreed to pay $1.78 billion last year over a bribery and bid-rigging scandal.

See also:

• U.S. Official Signals Era of Big Corporate Penalties Is Ending

Ericsson has acted to address shortcomings after identifying breaches of its code of business ethics and the FCPA, it said in the statement. The company also said it failed to react to red flags, enabling some employees to circumvent internal controls.

"We have over the last two years taken steps to address those gaps and shortcomings, and now we have a program that is much more fit for purpose, and we're ensuring that the company and every employee in the company follow our code of business ethics," Ekholm said in the phone interview.

"And you know the reality is that in a company of 100,000 employees there will be some rogue employees," he said, adding that what's key now is that Ericsson has a program in place to identify any misconduct and then take action quickly and thoroughly.

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