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Pattern Group

, one of the leading resellers on Amazon

, took the plunge into the public markets on Friday, and saw its stock slip in its Nasdaq debut.

Trading under the ticker “PTRN,” the stock opened at $13.50 after the company sold shares at $14 in its IPO, the middle of the expected range. Pattern’s offering raised $300 million, with half the proceeds going to investors, and valued the company at about $2.5 billion.