RALEIGH – Bandwith has disclosed a expected much bigger revenue loss from a recent series of hacking attacks, sending the company’s stock down more than 4% in overnight trading.

In a preliminary third quarters earning announcement issued Tuesday after the markets closed, the Raleigh-based provider of telecommunications services said losses from the attack could be as much as $12 million by year’s end. In the third quarter ending this month Bandwidth said it was taking a loss of some $700,000.

Bandwidth (Nasdaq: BAND) stock already was in a nose-dive, having dropped more than 47% over the past year to $85.81 at Tuesday’s close, according to Nasdaq data. BAND fell to a 52-week low of $87.77 in the wake of the attack then slid to a new low of $77.74 on Oct. 12. Shares recovered to more than $91 less than two weeks later but have since fallen under $80.

The so-called distributed denial of service (“DDoS”) attack hit Bandwidth last month, and the company described it as “a series of sophisticated DDoS attacks aimed at Bandwidth and our industry.”

Bandwidth has not responded to questions as to whether the incidents were ransomware attacks.

Bandwidth says network ‘back to normal’ after cyber attack; stock hits 52-week low

In Thursday’s announcement, Bandwidth CEO David Morken said the company had diverted traffic from some of its customers during the attacks. Bandwidth provides services related to 911 and other traffic as a CPaaS [communications platform as a service] provider.

Bandwidth’s customers include Microsoft, Google, Zoom and many others that utilize internet-based services in Bandwidth’s product portfolio.

“Consistent with our ethos to do the right thing for our customers, we helped some of our customers divert traffic from our platform during the attack to mitigate impacts to their businesses,” Morken said. “While that traffic is beginning to come back, we believe we will see a top-line impact of that lost volume primarily in the fourth quarter. We believe we are now stronger than ever, and are focused on serving our customers.”

Bandwidth revenues for the third quarter were up 54% year over year to some $131 million, according to the firm’s preliminary report. That’s higher than the $123.6-$124.6 million range the company had estimated.

However, by year’s end Bandwith expects a drop of “between $9 million and $12 million,” including the already declared $700,000 impact.

Bandwidth formally discloses third-quarter earnings on Nov. 8.