Sales on Amazon's (AMZN) - Get Report Prime Day this year surpassed those for last year's Black Friday and Cyber Monday combined, Amazon said in a press release Wednesday morning.

Adobe Analytics estimated that Amazon recorded $6.22 billion in sales last year over Black Friday and Cyber Monday. Estimates from Adobe for this year's Prime Day results should be released later today.

According to the release, Prime members purchased more than 175 million items over the course of the two-day event, and this year's Prime Day also garnered the most two-day sales ever for Amazon's own devices, including the Echo and Fire TV Sticks. Amazon also noted that it signed up more new Prime members over the two-day event than over any other two-day period, and that members in 18 countries shopped for deals, twice the number as did in its first Prime Day in 2014. 

"Members purchased millions of Alexa-enabled devices, received tens of millions of dollars in savings by shopping from Whole Foods Market and bought more than $2 billion of products from independent small and medium-sized businesses," Amazon CEO Jeff Bezos said in the release.

Amazon shares were down 0.2% to $2,004.60 on Wednesday morning and are up 34% so far this year.

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Amazon tweeted on Monday that worldwide sellers on its platform saw the largest sales over a 24-hour period in Amazon's history.

The Wall Street Journal reported on Tuesday that customers were being notified of expected delivery times longer than the usual two-day delivery promise as Prime Day orders flooded its site. 

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