- Amazon shares trade as high as $1,004.75.
- Amazon says Prime Day sales rose more than 60 percent from the same 30-hour period last year.
Amazon shares once again crossed the $1,000 mark after the company reported Wednesday that its third annual Prime Day event was its "biggest sales day ever."
While Amazon, didn't disclose any specific sales figures, it said sales rose more than 60 percent from the same 30-hour period last year.
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After the announcement, Amazon shares traded as high as $1,004.75, before falling back around $1,000.
Amazon share prices first crossed that milestone in May, rising as high as $1,017 before retreating.
Amazon shares have split three times since its initial public offering in 1997. In 1998, Amazon issued a 2-for-1 split. In January 1999, it issued a 3-for-1 split, and in September 1999, it split 2-for-1. When Amazon hits $1,000, it's technically the equivalent of a $12,000 share price in today's terms.
— CNBC's Peter Shacknow and Todd Haselton contributed to this report.